WO2023098878A1 - 电池组、电池组的制造方法及用电设备 - Google Patents

电池组、电池组的制造方法及用电设备 Download PDF

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Publication number
WO2023098878A1
WO2023098878A1 PCT/CN2022/136212 CN2022136212W WO2023098878A1 WO 2023098878 A1 WO2023098878 A1 WO 2023098878A1 CN 2022136212 W CN2022136212 W CN 2022136212W WO 2023098878 A1 WO2023098878 A1 WO 2023098878A1
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WO
WIPO (PCT)
Prior art keywords
hole
battery pack
circuit board
wall
cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/136212
Other languages
English (en)
French (fr)
Inventor
彭芳桂
杨典
胡成东
杨鹏程
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongguan Poweramp Technology Ltd
Original Assignee
Dongguan Poweramp Technology Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongguan Poweramp Technology Ltd filed Critical Dongguan Poweramp Technology Ltd
Priority to EP22900682.0A priority Critical patent/EP4439802A4/en
Priority to AU2022400919A priority patent/AU2022400919B2/en
Publication of WO2023098878A1 publication Critical patent/WO2023098878A1/zh
Priority to US18/679,961 priority patent/US20240405317A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6562—Gases with free flow by convection only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the technical field of energy storage, and in particular to a battery pack, a method for manufacturing the battery pack, and electrical equipment.
  • the circuit board in the battery When the battery is in use, the circuit board in the battery will emit a lot of heat. In order to avoid the battery temperature from being too high, the battery needs to be dissipated.
  • the traditional heat dissipation method is to add heat sinks between the cells, but this heat dissipation method has limited heat dissipation for the circuit board. .
  • An embodiment of the present application provides a battery pack, including a housing assembly, a cell assembly, a first circuit board, a first heat sink, a first structural member, and a first insulating member.
  • the cell assembly is arranged in the shell assembly.
  • the cell assembly includes a cell.
  • the cell includes a cell casing, an electrode assembly disposed in the cell casing, and an electrode terminal connected to the electrode assembly and drawn out from the cell casing.
  • the first circuit board is arranged in the casing component and connected to the electrode terminals.
  • the first heat sink is disposed in the housing assembly.
  • the first structural component is disposed between the first circuit board and the first heat sink.
  • the outer surface of the first structural member is provided with insulating material.
  • the first insulating part is at least partially disposed between the first structural part and the first heat dissipation part, and the first structural part and the first heat dissipation part are bonded through the first insulating part.
  • the heat dissipation of the battery pack is improved by bonding the first insulating member between the first structural member and the first heat dissipation member and bonding the first structural member and the first heat dissipation member.
  • the first insulating member is formed by injecting flowing insulating material into the battery pack and curing it.
  • the housing assembly, the battery core assembly, the first circuit board, the first structural member, and the first heat dissipation member are adhesively connected through the first insulating member.
  • the first insulator can enhance the protection of the battery pack, and the first insulator has a better thermal conductivity, which is beneficial to improving heat dissipation of the battery pack.
  • the first insulator covers the part of the electrode terminal located outside the cell casing, so as to strengthen the fixing of the electrode terminal and improve the heat dissipation of the electrode terminal.
  • the cell casing includes a first part and a second part.
  • the first part houses the electrode assembly.
  • the second part connects to the first part. Electrode terminals protrude from the second portion.
  • the first insulator covers at least a part of the second part to strengthen the protection of the second part and improve the heat dissipation of the battery case.
  • the housing assembly is provided with a first through hole and a second through hole.
  • the first cooling element is provided with a first channel.
  • the first channel communicates with the first through hole and the second through hole.
  • the first heat sink dissipates the heat of the first circuit board and the battery cell assembly from the first through hole and the second through hole to the external environment through the first channel, thereby improving the heat dissipation of the first circuit board and the battery cell assembly, and reducing the battery life. group temperature.
  • the first heat sink is provided with a first insulating portion.
  • the first insulating part is disposed between the inner surface of the casing component and the first heat sink.
  • the gap between the shell assembly and the first heat sink can be filled, the flow of the first insulating piece between the shell assembly and the first heat sink can be reduced, and the shell assembly and the first heat sink can also be insulated.
  • the housing assembly includes a first housing.
  • the first case is formed with a first space.
  • the first heat sink is disposed in the first space.
  • the first housing includes a first wall, a second wall, a third wall and a fourth wall.
  • the first wall and the second wall are oppositely arranged along the first direction.
  • the third wall and the fourth wall are oppositely arranged along the second direction.
  • the first heat sink connects inner surfaces of the first wall, the second wall, the third wall and the fourth wall.
  • the first through hole is disposed on the first wall.
  • the second through hole is disposed on the second wall.
  • the cell assembly includes a plurality of cells. Multiple electric cores are stacked along the first direction.
  • the third wall is provided with the first region.
  • the first region is provided with a first housing insulator.
  • the third wall and the first heat sink are adhesively connected by the first housing insulating member, which can reduce the distance between the first insulating member between the first region and the first side wall when the first housing is poured into the first insulating member upside down. flow in the gap.
  • the fourth wall is provided with a second area.
  • the second area is provided with a second housing insulator.
  • the fourth wall and the first heat sink are bonded and connected through the second housing insulating member, which can reduce the gap between the first insulating member between the second region and the second side wall when the first housing is poured into the first insulating member upside down. flow in the gap.
  • the battery pack further includes a compressible first insulating part and a second insulating part.
  • the first insulating part is disposed between the first wall and the first heat sink.
  • the first insulating part is in a compressed state, which can strengthen and seal the gap between the third side wall and the first wall
  • the second insulating part is arranged between the second wall and the first heat sink.
  • the first insulating part is in a compressed state, which can strengthen and seal the gap between the fourth side wall and the second wall.
  • the first insulating part includes foam.
  • the surface of the foam connecting the first cooling element and the first wall has glue, which can be bonded to the first cooling element and the first wall.
  • the second insulating part includes foam.
  • the surface of the foam connecting the first heat sink and the second wall has glue, which can be bonded to the first heat sink and the second wall.
  • the battery pack further includes a connection bracket.
  • the housing assembly also includes a second housing.
  • a second circuit board is arranged in the second casing.
  • the first shell and the second shell are connected to the connecting bracket.
  • the connecting bracket is arranged between the second circuit board and the first heat sink. The risk of short circuit between the second circuit board and the first heat sink can be reduced.
  • the connecting bracket is provided with bracket through holes, and a second space is formed between the connecting bracket and the first heat sink.
  • the bracket through hole communicates with the second space. It is beneficial to heat dissipation of the second circuit board.
  • the embodiment of the present application also provides a battery pack, including a casing assembly, a cell assembly and two second heat sinks.
  • the cell assembly is arranged in the shell assembly.
  • the cell assembly includes a plurality of cells stacked along a first direction.
  • the cell includes a cell casing, an electrode assembly disposed in the cell casing, and an electrode terminal connected to the electrode assembly and drawn out from the cell casing.
  • the two second heat sinks are disposed between adjacent battery cells.
  • Each second heat sink includes a first component and a first recess.
  • the projection of the first component at least partially overlaps the projection of the cell housing.
  • the first component is arranged between the adjacent electric cores along the first direction, and can dissipate heat to the adjacent electric cores.
  • the two first recesses are oppositely arranged to form a second channel, which is convenient for injecting the first insulating member into the battery pack from the bottom of the battery cell.
  • some battery cells are stacked and arranged in a first row along the first direction.
  • Part of the cells are stacked in a second column along the first direction.
  • the first row and the second row are arranged along a second direction perpendicular to the first direction.
  • the second heat sink includes two first components.
  • One of the first components is located between adjacent cells in the first column.
  • Another first component is located between adjacent cells in the second column, and the first recess connects the two first components.
  • the first row of batteries and the second row of batteries are simultaneously dissipated through the two first components.
  • the first recess is located between the cell casings of the first row of cells and the cell casings of the second row of cells.
  • the cell casing includes a first part and a second part.
  • the first part houses the electrode assembly.
  • the second part connects to the first part.
  • Electrode terminals protrude from the second portion.
  • the second part includes a first sealing portion and a second sealing portion.
  • the electrode terminal extends out of the first part from the first sealing part.
  • the projection of the first concave portion overlaps with the projection of the second sealing portion close to the first concave portion.
  • the second sealing portion and the first concave portion close to the second sealing portion are bent toward the same direction.
  • the projection of the second sealing portion is separated from the projection of the first concave portion.
  • the third direction is perpendicular to both the first direction and the second direction.
  • the second heat sink further includes a second component.
  • the second part connects the sides of the first part.
  • the second part protrudes from between the adjacent electric cores and is bent toward the electric cores.
  • the second part is connected to the battery case.
  • the second heat sink further includes two second components arranged along the second direction.
  • the second part is connected to the two sides of the cell casing arranged along the second direction, so that the periphery of the cell casing is provided with the second part, further improving the heat dissipation effect of the cell.
  • the second component and the electrode terminals are arranged along a third direction. Viewed along the third direction, the second component covers at least part of the cell casing.
  • an elastic member is provided between adjacent first components.
  • the elastic member can be compressed to provide expansion space for the cell.
  • the cell casing includes a first casing and a second casing.
  • the first shell is connected to the second shell.
  • the first shell and the second shell can be folded along the connecting position, so that the first shell and the second shell overlap to form a first part to cover the electrode assembly.
  • a peripheral side of the first shell extends outward to form a plurality of first extensions.
  • the peripheral side of the second shell extends outward to form a plurality of second extensions. After the first shell and the second shell are folded along the connection position, the first extension part and the second extension part are overlapped and sealed to form the second part.
  • a first insulating member is further included.
  • the first insulating member is formed by injecting flowing insulating material into the battery pack through the second channel and curing it. The heat dissipation of the battery pack is improved by the first insulating member.
  • An embodiment of the present application also provides a battery pack, including a housing assembly, a cell assembly, a first circuit board, a first heat sink, a first electrical connection part, and a first structural member.
  • the battery cell assembly is arranged in the casing assembly, the battery cell assembly includes a plurality of battery cells stacked along the first direction, and the battery cell includes the battery cell casing, the electrode assembly arranged in the battery cell casing, and the electrode assembly connected to the electrode assembly and from the Electrode terminals drawn from the battery case.
  • the first circuit board is arranged in the casing component and connected to the electrode terminals.
  • the first heat sink is connected to the inner surface of the shell assembly.
  • the first electrical connection part includes a first conductive part and a first insulating part, the first conductive part includes a first segment and a second segment, the first segment is connected to the first circuit board, and the second segment is exposed to the first insulating part. department.
  • the first structural component includes a first main body, the first main body is disposed between the first circuit board and the first heat sink, the first structural component is provided with a first opening, the first opening penetrates the surface of the first main body, and the first electrical connection After passing through the first opening, it extends to the side of the first structural member away from the first circuit board, the first structural member is provided with a first convex portion, the first convex portion is arranged on the edge of the first opening, and the second section accommodates In the first protrusion, the bend of the second section is insulated by the first protrusion, reducing the risk of short circuit occurring at the bend of the second section.
  • the first insulating part is at least partially accommodated in the first protrusion, increasing the length of the first protrusion, and further improving the insulation of the bending part of the second section.
  • the first heat sink is provided with a fourth opening.
  • the first protrusion is disposed in the fourth opening.
  • the first electrical connection part passes through the fourth opening.
  • the battery pack further includes a second circuit board.
  • the first electrical connection part is connected to the second circuit board after passing through the fourth opening.
  • the second circuit board includes a circuit board with a battery management system.
  • the housing assembly includes a first wall and a second wall arranged in a row along a first direction.
  • the first wall is provided with a first through hole.
  • the second wall is provided with a second through hole.
  • the first cooling element is provided with a first channel.
  • the first channel communicates with the first through hole and the second through hole.
  • the first heat sink dissipates the heat of the first circuit board and the battery cell assembly from the first through hole and the second through hole to the external environment through the first channel, thereby improving the heat dissipation of the first circuit board and the battery cell assembly, and reducing the battery life. group temperature.
  • a fourth insulator is provided in the fourth opening to close the fourth opening, which can reduce the outflow of the first insulator from the fourth opening when injecting the first insulator.
  • the first heat sink is provided with a plurality of first channels arranged along the second direction.
  • the second direction is perpendicular to the first direction.
  • Fourth protrusions are arranged in the two outermost first passages arranged along the second direction.
  • the fourth convex portion is in contact with the first convex portion.
  • the first convex part can be positioned, and then the first electrical connection part can be positioned, and a space can be reserved to facilitate the injection of the fourth insulating part.
  • An embodiment of the present application also provides a battery pack, including a casing assembly, a battery cell assembly, a first circuit board, a first heat sink, and a first electrical connection part.
  • the cell assembly is arranged in the shell assembly.
  • the cell assembly includes a plurality of cells stacked along a first direction.
  • the cell includes a cell casing, an electrode assembly disposed in the cell casing, and an electrode terminal connected to the electrode assembly and drawn out from the cell casing.
  • the first circuit board is arranged in the casing component and connected to the electrode terminals.
  • the first heat sink is connected to the inner surface of the housing assembly.
  • the first electrical connection part is soldered to the first circuit board.
  • the first electrical connection part includes a first conductive part and a first insulating part.
  • the first conductive portion includes a first section and a second section.
  • the first section is connected to the first circuit board.
  • the second section is exposed from the first insulating part.
  • the second section includes a plurality of monoliths arranged in a stack. The heat dissipation of the battery pack is improved through the first heat sink, and the second section is set as a soft structure, which facilitates bending of the first electrical connection part, reduces the length of the energy circuit, and reduces the weight of the first electrical connection part.
  • the monolith includes a soft copper bar monolith.
  • the second section includes a third structure and a fourth structure.
  • the third structural member extends in a direction opposite to the third direction and bends in a second direction.
  • the fourth structural member is connected to an end of the third structural member away from the first section, and is folded in a direction opposite to the first direction, and the first direction is perpendicular to the second direction and the third direction at the same time.
  • a second circuit board is also included.
  • the second circuit board is provided with a first connecting portion.
  • An end of the fourth structural member away from the first section protrudes from the first insulating part for connecting with the first connecting part.
  • the first heat sink is provided with a fourth opening.
  • the first electrical connection part passes through the fourth opening.
  • the first electrical connection part is connected to the second circuit board after passing through the fourth opening.
  • the second circuit board includes a circuit board with a battery management system.
  • a first insulating member is further included.
  • the first insulating member is located between the first heat dissipation member and the cell shell, and the heat dissipation of the battery pack is improved through the first insulating member.
  • An embodiment of the present application also provides a battery pack, including a housing assembly, a battery cell assembly, a first circuit board, a first heat sink, and a first structural member.
  • the housing assembly includes a first wall and a second wall arranged along a first direction.
  • the cell assembly is arranged in the shell assembly.
  • the cell assembly includes a plurality of cells stacked along a first direction.
  • the cell includes a cell casing, an electrode assembly disposed in the cell casing, and an electrode terminal connected to the electrode assembly and drawn out from the cell casing.
  • the first circuit board is arranged in the casing component and connected to the electrode terminals.
  • the first heat sink is connected to the inner surface of the housing assembly.
  • the first structural component includes a fourth protrusion connecting the first body to an edge of the first body.
  • the first body is disposed between the first circuit board and the first heat sink.
  • the fourth protrusion is arranged on the side of the first circuit board, the projection of the fourth protrusion overlaps with the projection of the first circuit board, and the connection of the first structural member to the first circuit board is limited by the fourth protrusion location for easy assembly.
  • the projection of the first circuit board is located within the projection of the fourth protrusion.
  • the first circuit board is disposed in the notch.
  • At least one electrode terminal is connected to the first circuit board after passing through the gap.
  • the fourth protrusion covers at least part of the electrode terminal.
  • the projection of the fourth protrusion covers the part of the electrode terminal outside the cell casing, which can insulate the electrode terminal.
  • some battery cells are stacked and arranged in a first row along the first direction. Part of the cells are stacked in a second column along the first direction. The first column and the second column are arranged along the second direction. The second direction is perpendicular to the first direction.
  • the first circuit board is also provided with a second conductive sheet. The second conductive sheet connects the two electrode terminals of the two electric cores arranged along the second direction, and is used to transfer current from the first column to the second column, and the two electrode terminals pass through the gap.
  • the projection of the fourth protrusion covers the projection of the second conductive sheet to insulate the second conductive sheet.
  • the battery pack further includes a first electrical connection part and a second electrical connection part.
  • the first electrical connection part and the second electrical connection part are soldered to the first circuit board.
  • the electrode terminals include first and second terminals with opposite polarities.
  • the first electrical connection part is connected to one of the first terminal and the second terminal of the electric core.
  • the second electrical connection part is connected to another one of the adjacent electric cores.
  • the first terminal and the second terminal are connected to the first circuit board after passing through the gap.
  • the first body covers the area where the first electrical connection part is welded to the first circuit board.
  • the first body covers the area where the second electrical connection part is welded to the first circuit board.
  • the area where the second electrical connection part is connected to the first circuit board is insulated.
  • the projection of the fourth protrusion covers the part of the first terminal located outside the cell casing to insulate the first terminal.
  • the projection of the fourth protrusion covers the part of the second terminal located outside the cell casing to insulate the second terminal.
  • the first circuit board is provided with multiple groups of holes.
  • Each set of holes includes a first hole and a second hole.
  • the first circuit board is provided with a plurality of first conductive sheets.
  • the first terminal of the adjacent electric core passes through the first hole.
  • the second terminal of the other electric core passes through the second hole.
  • the welding part of the first terminal and the welding part of the second terminal are stacked on each other and welded on the first conductive sheet.
  • a side of the first structural member opposite to the first circuit board is provided with a third protrusion.
  • the projection of the third convex part is located between adjacent first conductive sheets arranged along the second direction, and the third direction is perpendicular to the first direction and the second direction at the same time, and is used for positioning the first structural member position, so that there is a gap between the first structural component and the first circuit board, so that the first insulating component can flow in.
  • a first insulating member is further included.
  • the first insulator is formed by setting a flowable insulating material in the housing assembly and curing it.
  • the first insulator is located between the first heat sink and the battery case, and covers the first circuit board, the first structural member and the electrode terminal, and the first circuit board, the first structural member and the electrode terminal are connected by the first insulator Fix and insulate.
  • An embodiment of the present application also provides a battery pack, including a casing assembly, a cell assembly, a first circuit board, a first heat sink, a first structural member, and a first insulating member.
  • the cell assembly is arranged in the shell assembly.
  • the cell assembly includes a plurality of cells.
  • the cell includes a cell casing, an electrode assembly disposed in the cell casing, and an electrode terminal connected to the electrode assembly and drawn out from the cell casing.
  • the electrode terminal includes a welded portion. The welding parts of adjacent electric cores are overlapped.
  • the first circuit board is arranged in the casing component and connected with the welding part.
  • the first heat sink is connected to the inner surface of the housing assembly.
  • the first circuit board and the first heat sink are arranged along the third direction.
  • the first structural component is disposed between the first circuit board and the first heat sink.
  • the outer surface of the first structural member is provided with insulating material, and the first structural member is provided with a fourth communication hole.
  • the first insulating part is at least partially located between the first structural part and the first heat dissipation part, and in the fourth communication hole.
  • the first insulating part flows between the first structural part and the first heat dissipation part through the fourth communicating hole. The heat is transferred to the first heat dissipation element through the first insulating element, so as to improve the heat dissipation of the battery pack.
  • the flowable insulating material flows into between the first structural member and the first heat dissipation member through the fourth communication hole to form the first insulating member.
  • the first circuit board is further provided with a plurality of first communication holes.
  • the first communication hole penetrates the first circuit board. The first communication hole allows the first insulating member to flow into the battery pack, thereby improving the efficiency of injecting the first insulating member into the battery pack.
  • the electrode terminals include a first terminal and a second terminal with opposite polarities.
  • One of the first terminal and the second terminal is a positive terminal.
  • the other is the negative terminal.
  • the first circuit board is provided with multiple groups of holes. Each set of holes includes a first hole and a second hole arranged along a first direction. The first hole and the second hole extend along the second direction.
  • the first terminal of the adjacent electric core passes through the first hole.
  • the second terminal of the other electric core passes through the second hole.
  • the soldering portion of the first terminal and the soldering portion of the second terminal are stacked and connected to the first circuit board.
  • the first direction is perpendicular to both the second direction and the third direction.
  • the first circuit board is provided with a plurality of first conductive sheets.
  • the first conductive sheet is connected to the first circuit board and is arranged in the first hole and the second hole.
  • the first terminal of the adjacent electric core passes through the first hole.
  • the second terminal of the other electric core passes through the second hole.
  • the welding part of the first terminal and the welding part of the second terminal are stacked on each other and then welded to the first conductive sheet.
  • each set of holes further includes a third hole.
  • the third hole is located between the first hole and the second hole.
  • the projection of the third hole is located within the projection of the first conductive sheet, which facilitates the flow of the first insulator from the third hole into the battery pack.
  • the housing assembly is provided with a first through hole and a second through hole.
  • the first cooling element is provided with a first channel.
  • the first channel communicates with the first through hole and the second through hole.
  • the first heat sink dissipates the heat of the first circuit board and the battery cell assembly from the first through hole and the second through hole to the external environment through the first channel, thereby improving the heat dissipation of the first circuit board and the battery cell assembly, and reducing the battery life. group temperature.
  • the projection of the fourth communication hole is away from the projection of the first communication hole.
  • the first insulating member includes potting compound.
  • An embodiment of the present application also provides an electric device, including the battery pack in any of the above embodiments.
  • An embodiment of the present application also provides a method for manufacturing a battery pack, including the following steps: installing the battery cell, the first circuit board, and the first heat sink on the first casing, and connecting the first heat sink to the first casing.
  • the fourth insulator is injected into the opening on the first heat sink to close the first heat sink. After the fourth insulator is cured, the first shell is turned upside down and the first insulator is injected. After the first insulating member is cured, the first electrical connection part is connected to the second circuit board, and the second casing is installed on the first casing.
  • the step of installing the second housing on the first housing further includes injecting a third insulating member between the second circuit board and the second housing, and covering the second circuit board.
  • the first insulating member is placed in the shell assembly from the side of the cell assembly facing away from the first heat sink, and covers the first circuit board, the first structural member and the electrode terminal, and is glued through the first insulating member.
  • the casing assembly, the electric core assembly, the first circuit board, the first structural part and the first heat dissipation part are connected to improve the heat dissipation of the battery pack.
  • Fig. 1 shows a schematic structural diagram of a battery pack in some embodiments.
  • Fig. 2 shows a structural schematic diagram of another viewing angle of the battery pack in some embodiments.
  • Fig. 3 shows a structural schematic diagram of another viewing angle of the battery pack in some embodiments.
  • Figure 4 shows an exploded schematic view of a battery pack in some embodiments.
  • Fig. 5 shows a sectional view along III-III of the battery pack in Fig. 1 .
  • FIG. 6 shows a schematic view of the battery pack in FIG. 5 provided with a first insulating member.
  • Fig. 7 shows a schematic diagram of the structure of the third wall in some embodiments.
  • Figure 8 shows a schematic diagram of a second housing and a second circuit board in some embodiments.
  • Figure 9 shows an exploded schematic view of the second housing and the second circuit board in some embodiments.
  • Fig. 10 shows a schematic structural diagram of a single cell in some embodiments.
  • Fig. 11 shows a schematic view of the structure of a single cell in some embodiments from another perspective.
  • Figure 12 shows an exploded schematic view of a single cell in some embodiments.
  • Fig. 13 shows a schematic structural diagram of multiple electric cores in some embodiments.
  • Figure 14 shows an exploded schematic view of multiple cells in some embodiments.
  • Fig. 15 shows a schematic structural diagram of a second heat sink in some embodiments.
  • Fig. 16 shows a structural schematic diagram of multiple electric cores from another perspective in some embodiments.
  • Fig. 17 shows a schematic structural view of the battery cell and the first circuit board in some embodiments.
  • Fig. 18 shows a schematic structural diagram of the first circuit board in some embodiments.
  • Fig. 19 shows a schematic diagram of the exploded structure of the first circuit board in some embodiments.
  • Fig. 20 shows a schematic structural diagram of the first electrical connection part in some embodiments.
  • Fig. 21 shows a schematic structural view of the battery pack in an open state in some embodiments.
  • Fig. 22 shows a schematic structural view of the first structural member in some embodiments.
  • Fig. 23 shows a schematic structural diagram of a battery cell, a first circuit board and a first structural member in some embodiments.
  • Fig. 24 shows a structural schematic view of the battery cell, the first circuit board and the first structural member from another perspective in some embodiments.
  • FIG. 26 shows a schematic cross-sectional view along II-II of the battery pack in FIG. 25 with the first casing and the second casing removed.
  • FIG. 27 shows a schematic view of the structure in FIG. 23 provided with the first insulating member.
  • Fig. 28 shows a sectional view along III-III of the battery pack in another embodiment.
  • Fig. 31 shows a schematic structural diagram of the first heat sink from another viewing angle in some embodiments.
  • Fig. 34 shows a schematic view of the structure of the first heat sink viewed along the first direction in some embodiments.
  • Fig. 37 shows a schematic structural view of the first heat sink in some other embodiments.
  • Fig. 44 shows a schematic flowchart of a method for manufacturing a battery pack in an embodiment.
  • the first terminal 212b The first terminal 212b
  • the first structural member 40 is the first structural member 40
  • the first radiator 50 The first radiator 50
  • the first channel 50a The first channel 50a
  • a component When a component is said to be “set on” another component, it can be set directly on another component or there may be an intervening component at the same time.
  • a component When a component is said to be “connected” to another component, it may be directly connected to the other component or there may be an intervening component at the same time.
  • the angle between the two components is allowed to have a tolerance of 0- ⁇ 5%.
  • the tolerance range between the two components is greater than 0° and less than or equal to 4.5°.
  • an embodiment of the present application provides a battery pack 100 , including a case assembly 10 , a cell assembly 20 , a first circuit board 30 , a first structural member 40 and a first heat sink 50 .
  • the cell assembly 20 is disposed in the casing assembly 10 .
  • the first circuit board 30 is disposed in the casing assembly 10 and connected to the cell assembly 20 .
  • the first structural component 40 is disposed between the first circuit board 30 and the first heat sink 50 .
  • the housing assembly 10 is provided with a first through hole 10a and a second through hole 10b, and the first through hole 10a and the second through hole 10b communicate with the outside.
  • the first heat sink 50 is provided with a first passage 50a, and the first passage 50a communicates with the first through hole 10a and the second through hole 10b.
  • the first heat sink 50 dissipates the heat of the first circuit board 30 and the electric core assembly 20 from the first through hole 10a and the second through hole 10b to the external environment through the first channel 50a, and improves the heat dissipation of the first circuit board 30 and the electric core assembly 20.
  • the heat dissipation of the core assembly 20 lowers the temperature of the battery pack 100 .
  • the battery pack 100 can use external air to remove heat from the first circuit board 30 and the battery cell assembly 20 through the flow of air.
  • the battery pack 100 can be used on a device that is in a static state during use. When the battery pack 100 is in a static state, natural wind or an external air cooling device can be used to dissipate heat.
  • the battery pack 100 can be used on a device that is in motion during use, such as a drone, an electric moped, etc. Since the air flow speed is faster when the device is moving, rapid heat dissipation of the battery pack 100 can be achieved.
  • the housing assembly 10 includes a first housing 11 and a second housing 12 , and the first housing 11 is connected to the second housing 12 .
  • the first housing 11 includes a first wall 111 , a second wall 112 , a third wall 113 , a fourth wall 114 and a fifth wall 115 .
  • the first wall 111 is opposite to the second wall 112
  • the third wall 113 is opposite to the fourth wall 114 .
  • the fifth wall 115 is opposite to the second housing 12 .
  • the first wall 111 connects the third wall 113 and the fourth wall 114
  • the second wall 112 connects the third wall 113 and the fourth wall 114
  • the fifth wall 115 connects the first wall 111, the second wall 112, the third wall 113 and the third wall 113.
  • the fourth wall 114 forms a first space for accommodating at least one of the battery cell assembly 20 , the first circuit board 30 , the first structural component 40 and the first heat sink 50 .
  • the cell assembly 20 , the first circuit board 30 , the first structural component 40 and the first heat sink 50 are all accommodated in the first space.
  • the battery cell assembly 20 , the first circuit board 30 , the first structural component 40 are accommodated in the first space, and part of the first heat sink 50 is accommodated in the first space.
  • the cell assembly 20 is accommodated in the first space, and the cell assembly 20 , the first circuit board 30 , the first structural component 40 and the first heat sink 50 are disposed outside the first space.
  • the structure of the battery pack 100 will be described in conjunction with the X, Y, and Z coordinate axes.
  • the X, Y, and Z coordinate axes are perpendicular to each other, and the X direction is defined as the first direction.
  • the Y direction is the second direction
  • the Z direction is the third direction
  • the first direction X is the direction in which the first wall 111 and the second wall 112 are oppositely arranged
  • the second direction Y is the third wall 113 and the fourth wall 114 Relative to the installation direction
  • the third direction Z is the relative installation direction of the second casing 12 and the fifth wall 115
  • the first direction X is perpendicular to the second direction Y and the third direction Z at the same time.
  • the first through hole 10 a is provided on the first wall 111
  • the second through hole 10 b is provided on the second wall 112 .
  • the first heat sink 50 connects the inner surfaces of the first wall 111 , the second wall 112 , the third wall 113 and the fourth wall 114 , and the first passage 50 a communicates with the first through hole 10 a and the second through hole 10 b.
  • the first through hole 10a is the air inlet
  • the second through hole 10b is the air outlet
  • the first through hole 10a is the air outlet
  • the second through hole 10b is the air inlet.
  • the first through hole 10 a may also be provided on the third wall 113
  • the second through hole 10 b may also be provided on the fourth wall 114
  • the second through hole 10b is disposed on the second wall 112
  • the first through hole 10a may also be disposed on the third wall 113 .
  • the projection of the first through hole 10 a overlaps with the projection of the second through hole 10 b. It can be understood that, along the first direction X, the projection of the first through hole 10a partially overlaps the projection of the second through hole 10b, or the projection of the first through hole 10a completely covers the projection of the second through hole 10b, or the projection of the second through hole 10b completely overlaps. The projection of the second through hole 10b completely covers the projection of the first through hole 10a. In a specific implementation manner of the present application, along the first direction X, the projection of the first through hole 10 a is larger than and covers the projection of the second through hole 10 b.
  • the first through hole 10a is an air inlet
  • the second through hole 10b is an air outlet.
  • the hole diameter of the hole 10a is larger than the hole diameter of the second through hole 10b, which enhances air convection and further improves heat dissipation.
  • the battery pack 100 further includes a first insulator 60 , and the first insulator 60 connects the housing assembly 10 , the cell assembly 20 , the first circuit board 30 , the first structural member 40 and the first heat sink 50 Adhesive connection.
  • the first insulating member 60 can enhance the protection of the battery pack 100 .
  • the first insulating member 60 has better thermal conductivity, which is beneficial to improve the heat dissipation of the battery pack 100 .
  • the thermal conductivity of the first insulating member 60 is B, where 0.8w/mk ⁇ B ⁇ 3.0w/mk.
  • the first insulating member 60 is formed by injecting flowing insulating material into the battery pack 100 and curing it.
  • the first insulating member 60 includes one of potting glue, foam glue and adhesive.
  • the first insulating member 60 includes a resin, which is formed by setting the flowable resin in the battery pack 100 in a pouring manner after being heated and melted.
  • the first insulating member 60 includes a potting glue, and the flowable potting glue is set on the battery pack 100 by pouring and then cured to form. The hardness of the encapsulant after curing is 55-70A.
  • the temperature range of the potting compound is 40-120°C, which can be any one of 40°C, 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, 110°C, and 120°C.
  • the cell assembly 20, the first circuit board 30, the first structural member 40 and the first heat sink 50 are installed in the first housing 11, and the first heat sink 50 is connected to the first housing 11. Then turn the first housing 11 upside down, inject flowing resin or potting compound into the battery pack 100, and after turning upside down, set up the first heat sink 50, the first structural component 40, and the first circuit board 30 in sequence.
  • flowing resin or potting glue is injected into the battery pack 100 along the third direction Z from the bottom of the cell assembly 20 .
  • the cell assembly 20 includes a cell 21, and the cell 21 includes a cell casing 211, an electrode assembly 213 disposed in the cell casing 211, and an electrode assembly 213 connected to the electrode assembly 213 and connected to the cell casing 211.
  • the battery case 211 includes a first part 211a and a second part 211b, the first part 211a accommodates the electrode assembly 213, the second part 211b connects the first part 211a, and the electrode terminal 212 protrudes from the second part 211b.
  • the first insulator 60 is disposed between the first heat sink 50 and the battery case 211 , and the first insulator 60 covers the first circuit board 30 , the first structural member 40 and parts of the battery assembly 20 .
  • the cell housing 211 includes a first shell 2111 and a second shell 2112, and the first shell 2111 is connected to the second shell 2112.
  • the first shell 2111 and the second shell 2112 can be folded along the connection position, so that the first shell 2111 and the second shell 2112 overlap to form a first part 211 a to cover the electrode assembly 213 .
  • a peripheral side of the first casing 2111 extends outward to form a plurality of first extensions 2113
  • a peripheral side of the second casing 2112 extends outward to form a plurality of second extensions 2114 .
  • the second part 211b includes a first sealing part 2115 and a second sealing part 2116, the first sealing part 2115 is disposed opposite to the connection position, and the electrode terminal 212 protrudes from the first sealing part 2115 to the first part 211a.
  • the second part 211b includes two second sealing parts 2116, and the two second sealing parts 2116 are arranged opposite to each other along the second direction Y.
  • the second part 211b includes a first sealing portion 2115
  • the battery cell 21 includes two electrode terminals 212
  • the two electrode terminals 212 extend out of the battery cell case 211 from the first sealing portion 2115 .
  • the first housing 2111 and the second housing 2112 are separated
  • the second part 211b includes two first sealing parts 2115
  • the two first sealing parts 2115 are arranged opposite to each other along the third direction Z
  • the electric core 21 includes Two electrode terminals 212, wherein one electrode terminal 212 extends out of the cell casing 211 from one of the first sealing parts 2115, and the other electrode terminal 212 extends out of the cell casing 211 from the other first sealing part 2115, and the two The electrode terminals 212 are oppositely arranged along the third direction Z. As shown in FIG.
  • the first insulator 60 covers the part of the electrode terminal 212 extending out of the battery case 211 , so as to strengthen the fixing of the electrode terminal 212 and improve the heat dissipation of the electrode terminal 212 .
  • the first insulator 60 covers the part of the electrode terminal 212 extending out of the cell casing 211 and at least a part of the first sealing portion 2115 to strengthen the protection of the first sealing portion 2115 and improve the protection of the cell casing 211. heat dissipation.
  • the electrode assembly 213 includes a wound structure formed by winding a positive electrode sheet, a negative electrode sheet, and a separator.
  • the electrode assembly 213 can also be a laminated structure, that is, the positive electrode sheet, the separator and the negative electrode sheet are stacked in sequence to form an electrode assembly 213 unit, and multiple electrode assembly 213 units are laminated to form an electrode assembly 213 .
  • the battery case 211 includes an aluminum-plastic film.
  • the cell 21 includes a pouch cell.
  • the cell assembly 20 includes a plurality of cells 21 stacked along the first direction X.
  • the battery cell assembly 20 includes a plurality of battery cells 21, wherein some of the battery cells 21 are stacked along the first direction X to form a first column 21a, and some of the battery cells 21 are stacked along the first direction X to form a second column 21b.
  • the first row 21a and the second row 21b are arranged along the second direction Y.
  • the first row 21a includes at least battery cells 21a-1 and battery cells 21a-2 arranged in sequence.
  • the second column 21b at least includes battery cells 21b-1 and 21b-2 arranged in sequence, the battery cells 21a-1 and 21b-1 are arranged along the second direction Y, and the battery cells 21a-2 and 21b-2 are arranged along the second direction Y.
  • Direction Y alignment setting is
  • the battery cell assembly 20 includes a plurality of battery cells 21, and the multiple battery cells 21 are stacked along the first direction X to form a first column 21a, and the battery cell assembly 20 only includes one column of battery cells.
  • the first column 21a may further include a battery cell 21a-3, a battery cell 21a-4, a battery cell 21a-5, a battery cell 21a-6, and a battery cell 21a-7.
  • the second column 21b may also include a battery cell 21b-3, a battery cell 21b-4, a battery cell 21b-5, a battery cell 21b-6, and a battery cell 21b-7.
  • the third wall 113 has a first region 113a, the first region 113a is provided with a first housing insulator 1130, and the first heat sink 50 is provided oppositely along the second direction Y
  • the first side wall 50b and the second side wall 50c, the third wall 113 connects the first side wall 50b
  • the first housing insulator 1130 is located between the first area 113a and the first side wall 50b
  • the first housing insulator 1130 is set in the gap between the first region 113a and the first side wall 50b, which can reduce the gap between the first insulator 60 and the first region 113a and the first side wall when the first shell 11 is poured into the first insulator 60 upside down.
  • the first shell insulating member 1130 has thermal conductivity, and can transfer the heat on the first heat sink 50 to the third wall 113 .
  • the first housing insulator 1130 includes glue.
  • the glue includes thermally conductive glue.
  • the range of thermal conductivity of the thermal conductive adhesive is A, where 2.5w/mk ⁇ A ⁇ 5.0w/mk.
  • the first housing insulator 1130 can also prevent external impurities and dust from entering the cell assembly 20 .
  • the fourth wall 114 has a second area 114a, and the second area 114a is provided with a second housing insulator 1140, the fourth wall 114 is connected to the second side wall 50c, and the second housing insulator 1140 is located in the second area 114a and the second side wall 50c to connect the first heat sink 50 and the fourth wall 114, the second housing insulator 1140 is provided in the gap between the second area 114a and the second side wall 50c, and can be When the casing 11 is poured into the first insulating member 60 upside down, the flow of the first insulating member 60 in the gap between the second region 114 a and the second side wall 50 c is reduced.
  • the second housing insulator 1140 is located in the second area 114a and the second side wall 50c to connect the first heat sink 50 and the fourth wall 114
  • the second housing insulator 1140 is provided in the gap between the second area 114a and the second side wall 50c
  • the second housing insulating member 1140 has thermal conductivity, and can transfer the heat on the first heat sink 50 to the fourth wall 114 .
  • the second housing insulator 1140 includes glue.
  • the glue includes thermally conductive glue.
  • the range of thermal conductivity of the thermal conductive adhesive is A, where 2.5w/mk ⁇ A ⁇ 5.0w/mk.
  • the second housing insulator 1140 can also prevent foreign impurities and dust from entering the cell assembly 20 .
  • first through holes 10 a there are multiple first through holes 10 a and the same number of second through holes 10 b, and along the first direction X, the projection of the first through hole 10 a overlaps with the projection of the second through hole 10 b.
  • the battery pack 100 includes a second fastener 1112 .
  • a plurality of first through holes 10a are arranged at intervals, a third connection hole 1111 is provided between adjacent first through holes 10a, and a fourth connection hole 502 is provided on the first heat sink 50, along the first direction X , the projection of the third connection hole 1111 overlaps with the projection of the fourth connection hole 502 .
  • the second fastener 1112 is disposed in the third connection hole 1111 and the fourth connection hole 502 for connecting the first heat sink 50 and the first wall 111 .
  • a first sub-through hole 101 is provided between adjacent first through holes 10a.
  • the projection of the first sub-through hole 101 overlaps with the projection of the first channel 50a, which can increase the The air inlet or outlet of a channel 50a improves heat dissipation.
  • the projection of the first sub-through hole 101 overlaps with the projection of the third connection hole 1111 .
  • the first sub-through hole 101 and the third connection hole 1111 are disposed between adjacent first through holes 10a, and the area of the first wall 111 can be utilized to improve heat dissipation efficiency.
  • the battery pack 100 includes a third fastener 1113 .
  • a plurality of second through holes 10b are arranged at intervals, a fifth connection hole 1114 is provided between adjacent second through holes 10b, and a fourth connection hole is provided on the side of the first heat sink 50 connected to the second wall 112
  • the projection of the fifth connection hole 1114 overlaps with the projection of the fourth connection hole 502 .
  • the third fastener 1113 is disposed in the fifth connection hole 1114 and the fourth connection hole 502 for connecting the first heat sink 50 and the second wall 112 .
  • a second sub-through hole 101b is provided between adjacent second through holes 10b.
  • the projection of the second sub-through hole 101b overlaps with the projection of the first channel 50a, which can increase the The air inlet or outlet of a channel 50a improves heat dissipation.
  • the projection of the second sub-through hole 101 b overlaps with the projection of the fifth connection hole 1114 .
  • the second sub-through hole 101b and the fifth connection hole 1114 are disposed between adjacent second through holes 10b, and the area of the second wall 112 can be utilized to improve heat dissipation efficiency.
  • the battery pack 100 further includes a second circuit board 13 .
  • the second housing 12 has a second housing recess 12 a , and the second circuit board 13 is disposed in the second housing recess 12 a and is insulated from the second housing 12 .
  • the second circuit board 13 is provided with a first connection portion 131 and a second connection portion 132 , and the first connection portion 131 and the second connection portion 132 are electrically connected to the first circuit board 30 .
  • the second circuit board 13 can be a circuit board with a battery management system, which is used to intelligently manage and maintain each battery unit, reduce overcharging and overdischarging of the battery, prolong the service life of the battery, and monitor the state of the battery.
  • the second housing 12 has a second housing recess 12 a, and the second circuit board 13 is disposed in the second housing recess 12 a.
  • the second housing recess 12a includes a bottom 12a-1 and a side 12a-2, and the side 12a-2 is connected to an edge of the bottom 12a-1.
  • the bottom 12a-1 is provided with a plurality of connecting posts 121.
  • the second circuit board 13 is connected to one end of the connecting posts 121 away from the bottom 12a-1. There is a first gap 13a between the second circuit board 13 and the bottom 12a-1.
  • a second insulating member 122 is provided between the second circuit board 13 and the bottom 12 a - 1 , which can insulate the second circuit board 13 and between the second circuit board 13 and the second casing 12 .
  • the second insulating member 122 includes foam.
  • the first gap 13 a is provided with a third insulating member 123 , and the third insulating member 123 covers the second circuit board 13 .
  • the second circuit board 13 includes a first surface 13b and a second surface 13c arranged along the third direction Z.
  • the third insulator 123 can be arranged between the first surface 13b and the bottom 12a-1, which can insulate the second circuit board 13 and the second housing 12, and reduce impurities from entering the second circuit board 13 and the second housing 12.
  • the third insulator 123 covers the second surface 13c, which can further insulate the second circuit board 13 and the second housing 12, and further reduce impurities from entering the second circuit board 13 and the second housing 12.
  • the third insulator 123 is provided in the gap between the second circuit board 13 and the recessed portion 12a of the second housing, further strengthening the insulation between the second circuit board 13 and the second housing 12, and reducing the second circuit board 13. The risk of short circuit between the board 13 and the second housing 12 is further strengthened to reduce impurities entering between the second circuit board 13 and the second housing 12 .
  • the first connecting portion 131 and the second connecting portion 132 protrude from the surface of the third insulating member 123 to facilitate electrical connection to the first circuit board 30 during assembly.
  • the third insulating member 123 includes one of potting glue, foam glue and adhesive.
  • the third insulator 123 includes resin, and after the resin is heated and melted, the flowable third insulator 123 is placed in the concave portion 12a of the second casing by pouring and then cured.
  • the third insulating member 123 includes potting glue, and the hardness of the potting glue after curing is 40-50A, which can be any of 41A, 42A, 43A, 44A, 45A, 46A, 47A, 48A, 49A, and 50A. one.
  • the temperature range of potting glue is 40-200°C, which can be 40°C, 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, 110°C, 120°C, 130°C, 140°C, 150°C , 160°C, 170°C, 180°C, 190°C, 200°C.
  • the battery pack 100 further includes a connection bracket 14 , and the first casing 11 and the second casing 12 are connected to the connection bracket 14 .
  • the connection bracket 14 is disposed between the second circuit board 13 and the first heat sink 50 to reduce the risk of short circuit between the second circuit board 13 and the first heat sink 50 .
  • the connecting bracket 14 is made of insulating material.
  • a second space 10c is formed between the connecting bracket 14 and the first heat sink 50, the connecting bracket 14 is provided with a bracket through hole 141, and the bracket through hole 141 communicates with the second space 10c, which is beneficial to the second circuit Plate 13 dissipates heat.
  • the first housing 11 and the second housing 12 include heat-conducting materials, which can improve heat dissipation performance.
  • the first housing 11 and the second housing 12 include a metal heat conducting material and a heat conducting insulating material, and the insulating material may cover the outer surface of the metal heat conducting material.
  • the metal heat conducting material of the first housing 11 and the second housing 12 includes aluminum.
  • the outer wall of the second housing 12 is provided with fins 124 , and the fins 124 are arranged along the second direction Y and connected to the second housing 12 to further improve the heat dissipation performance.
  • the electric core 21 is in contact with the first housing 11 , and the heat of the electric core 21 is dissipated to the external environment through the first housing 11 .
  • the electrode terminal 212 has a welding portion 212 a extending out of the cell casing 211 , and the welding portion 212 a is formed by bending the electrode terminal 212 .
  • the electrode terminals 212 of adjacent battery cells 21 are bent towards each other and connected to the first circuit board 30 .
  • the electrode terminal 212 includes a first terminal 212b and a second terminal 212c, the first terminal 212b and the second terminal 212c have opposite polarities, one of the first terminal 212b and the second terminal 212c is a positive terminal, and the other One is the negative terminal.
  • the projection of the welding portion 212a of the first terminal 212b of the cell 21 at least partially overlaps the projection of the welding portion 212a of the second terminal 212c of the adjacent cell 21 .
  • the first terminal 212b and the second terminal 212c of adjacent cells are bent towards each other, and the welding portion 212a of the first terminal 212b and the welding portion 212a of the second terminal 212c are stacked and connected to each other.
  • the projection of the first terminal 212b of the cell 21 may at least partially overlap with the projection of the first terminal 212b of the adjacent cell 21, and be connected through the first circuit board 30, The parallel connection between the battery cells 21 is realized.
  • the cell assembly 20 further includes a plurality of second heat sinks 22, and the second heat sinks 22 are arranged on adjacent cells 21. between.
  • the second heat sink 22 contacts and connects to the battery cell 21 to dissipate heat from the battery cell 21 .
  • the second heat sink 22 is in contact with the first casing 11 , transfers the heat of the battery cell 21 to the first casing 11 , and dissipates heat from the battery cell 21 through the first casing 11 .
  • the second heat sink 22 includes a first component 221 , and the first component 221 is disposed between adjacent battery cells 21 along the first direction X, and can dissipate heat to the adjacent battery cells 21 .
  • the projection of the first component 221 at least partially overlaps with the projection of the battery case 211 .
  • the projection of the first component 221 is located within the projection of the battery case 211.
  • the first part 221 covers the cell 21a-1, and the first part 221 is provided with a first recess 221a.
  • the projection of the first recess 221a is consistent with the cell case of the cell 21a-1.
  • the projections of volume 211 overlap.
  • the first concave portion 221a is located on the same side as a second sealing portion 2116.
  • the projection of the first concave portion 221a overlaps with the projection of the second sealing portion 2116 of the cell 21a-1.
  • the second sealing portion 2116 of the battery cell 21a-1 is bent and arranged in a direction away from the first concave portion 221a.
  • the projection of the second sealing portion 2116 is separated from the projection of the first concave portion 221a.
  • the first concave portion 221a is in contact with the battery case 211 connected to the battery cell 21a-1, which can improve the heat dissipation of the battery cell 21a-1.
  • the first component 221 is provided with a first concave portion 221a, and along the first direction X, the projection of the first concave portion 221a overlaps with the projection of the cell casing 211 of the cell 21a-2.
  • the first concave portion 221a is located on the same side as a second sealing portion 2116.
  • the projection of the first concave portion 221a overlaps with the projection of the second sealing portion 2116 of the cell 21a-2.
  • the second sealing portion 2116 of the battery cell 21a-2 is bent and arranged in a direction away from the first concave portion 221a.
  • the projection of the second sealing portion 2116 is separated from the projection of the first concave portion 221a.
  • the first concave portion 221a is in contact with the battery case 211 connected to the battery cell 21a-2, which can improve the heat dissipation of the battery cell 21a-2.
  • the first recess 221a close to the cell 21a-1 and the first recess 221a close to the cell 21a-2 face opposite directions, and the flowing resin or potting glue flows from between the two first recesses 221a along the Injecting into the battery pack 100 is beneficial to improve the injection efficiency, and further reduce the flow of resin or potting compound from adhering to the first component 221 during the injection process.
  • the second heat sink 22 includes two first parts 221, one of the first parts 221 is located between the adjacent batteries 21a in the first row, and the other first part 221 is located in the second row of batteries.
  • the core 2b is between adjacent electric cores.
  • the first component 221 is provided with a first concave portion 221 a, and the first concave portion 221 a connects the two first components 221 .
  • the first component 221 covers the battery cell 21a-1 and the battery cell 21b-1.
  • the projection of the first concave portion 221 a overlaps with the projections of the cell case 211 of the cell 21 a - 1 and the cell case 211 of the cell 21 b - 1 .
  • the first concave portion 221a is located between the cell case 211 of the cell 21a-1 and the cell case 211 of the cell 21b-1.
  • the projection of the first concave portion 221a overlaps with the projection of the cell casing 211 of the battery cell 21a-1, and the first concave portion 221a and a second sealing portion 2116 of the battery cell 21a-1 are located on the same side
  • the projection of the first concave portion 221a overlaps with the projection of the second sealing portion 2116 of the cell 21a-1.
  • the second sealing portion 2116 of the battery cell 21a-1 is bent and arranged in a direction away from the first concave portion 221a.
  • the projection of the second sealing portion 2116 of the cell 21a-1 is separated from the projection of the first concave portion 221a.
  • the first concave portion 221a is in contact with the battery case 211 connected to the battery cell 21a-1, which can improve the heat dissipation of the battery cell 21a-1.
  • the projection of the first concave portion 221 a overlaps with the projection of the cell case 211 of the cell 21 b - 1 .
  • the first concave portion 221a is located on the same side as a second sealing portion 2116 of the cell 21b-1.
  • the projection of the first concave portion 221a is the same as the second sealing portion 2116 of the cell 21b-1.
  • the projections overlap.
  • the second sealing portion 2116 of the battery cell 21b-1 is bent and arranged in a direction away from the first concave portion 221a.
  • the projection of the second sealing portion 2116 of the cell 21b-1 is separated from the projection of the first concave portion 221a.
  • the first concave portion 221a is in contact with the battery case 211 connected to the battery cell 21b-1, which can improve the heat dissipation of the battery cell 21b-1.
  • the second heat sink 22 utilizes the space between the battery cell 21a-1 and the battery cell 21b-1 to increase the area of the first recess 221a and form a channel for filling the first insulating member 60, so as to facilitate the flow of resin or potting glue from the The bottom of the battery cell 21 is injected into the battery pack 100 to form the first insulating member 60 , and the flow-reducing resin or potting compound is bonded to the first member 221 during the injection process.
  • the second heat sink 22 includes two first parts 221, one of the first parts 221 is located between the adjacent batteries 21a in the first row, and the other first part 221 is located in the second row of batteries.
  • the core 2b is between adjacent electric cores.
  • the first component 221 is provided with a first concave portion 221 a, and the first concave portion 221 a connects the two first components 221 .
  • the first component 221 covers the battery cell 21a-2 and the battery cell 21b-2.
  • the projection of the first concave portion 221 a overlaps with the projections of the cell case 211 of the cell 21 a - 2 and the cell case 211 of the cell 21 b - 2 .
  • the first concave portion 221a is located between the cell case 211 of the cell 21a-2 and the cell case 211 of the cell 21b-2.
  • the projection of the first concave portion 221a overlaps with the projection of the cell casing 211 of the battery cell 21a-2, and the first concave portion 221a and a second sealing portion 2116 of the battery cell 21a-2 are located on the same side
  • the projection of the first concave portion 221a overlaps with the projection of the second sealing portion 2116 of the cell 21a-2.
  • the second sealing portion 2116 of the battery cell 21a-2 is bent and arranged in a direction away from the first concave portion 221a.
  • the projection of the second sealing portion 2116 of the cell 21a-2 is separated from the projection of the first concave portion 221a.
  • the first concave portion 221a is in contact with the battery case 211 connected to the battery cell 21a-2, which can improve the heat dissipation of the battery cell 21a-2.
  • the projection of the first concave portion 221 a overlaps with the projection of the cell case 211 of the cell 21 b - 2 .
  • the first concave portion 221a is located on the same side as a second sealing portion 2116 of the cell 21b-2.
  • the projection of the first concave portion 221a is the same as the second sealing portion 2116 of the cell 21b-2.
  • the projections overlap.
  • the second sealing portion 2116 of the battery cell 21b-2 is bent in a direction away from the first concave portion 221a.
  • the projection of the second sealing portion 2116 of the cell 21b-2 is separated from the projection of the first concave portion 221a.
  • the first concave portion 221a is in contact with the battery case 211 connected to the battery cell 21b-2, which can improve the heat dissipation of the battery cell 21b-2.
  • the first concave portion 221a close to the cell 21a-1 and the first concave portion 221a close to the cell 21a-2 are arranged in opposite directions.
  • the second heat sink 22 utilizes the space between the battery cell 21a-2 and the battery cell 21b-2 to increase the area of the first recess 221a, so that the flowing resin or potting glue can be injected into the battery pack 100 from the bottom of the battery cell 21
  • Forming the first insulating member 60 reduces the adhesion of the flowing resin or potting compound and the first component 221 during the injection process.
  • the first recess 221a is extended along the third direction Z, and the first recess 221a forms the second channel 221b, so as to facilitate injecting the first insulating member 60 into the battery pack 100 from the bottom of the battery cell 21 along the third direction Z.
  • a second structural member 221c is provided between adjacent first components 221, and there is a second gap 2211 between adjacent first components 221, which can increase the width of the second channel 221b along the first direction X, The area of the injection port of the second channel 221b can be enlarged, so that the external injection equipment can be aligned with the second channel 221b, and the efficiency of injecting into the first insulating member 60 can be improved.
  • the second structural member 221c includes an elastic member. When the electric core 21 expands, the second structural member 221c can be compressed to provide an expansion space for the electric core 21.
  • the second structural member 221c includes foam.
  • the surface of the first part 211a in contact with the first concave portion 221a is arranged in an arc shape, so that the first concave portion 221a is arranged between the two electric cores 21 arranged along the second direction Y, and the edge of the first concave portion 221a is increased. The distance in the second direction Y.
  • the second sealing portion 2116 is located in the middle of the first portion 211a and is bent to reserve a space for placing the first concave portion 221a.
  • the second heat sink 22 further includes a second part 222 connected to a side of the first part 221 .
  • the second part 222 protrudes from between adjacent battery cells 21 and is bent towards the battery cells 21 , so that the second part 222 is connected to the battery case 211 .
  • the second component 222 is in contact with the battery case 211 .
  • the second component 222 is connected to the battery case 211 through other structural members, such as thermal pads or thermal adhesives.
  • the projection of the second component 222 and the projection of the electric core 21 at least partially overlap.
  • the contact area between the second heat sink 22 and the cell case 211 is increased, and the heat is conducted to the second part 222 through the cell case 211, and then the second part 222 is conducted to the first casing 11 to improve the heat dissipation effect on the battery cell 21 .
  • two cells 21 arranged along the second direction Y are used as the first group of cells 21c
  • the first group of cells 21c includes a first side 21c-1, a second side 21c-2 and a third side.
  • Side 21c-3 The first side 21c-1 and the second side 21c-2 are arranged along the second direction Y, and the third side 21c-3 is the bottom of the first group of cells 21c.
  • the side of the first part 221 is provided with a plurality of second parts 222, and the plurality of second parts 222 protrude from between the adjacent cells 21, and are bent towards the cells 21, so that the second parts 222 are in contact with the second part.
  • a first heat conduction pad 222a is provided between the third side 21c-3 and the second part 222, and a second heat conduction pad is provided between adjacent first parts 221, so as to further improve the heat dissipation effect on the battery cell 21 .
  • the first part 221 and the second part 222 are integrally bent to increase the structural strength of the second heat sink 22 .
  • the second heat sink 22 is an aluminum shell.
  • the first circuit board 30 is provided with multiple groups of holes 31, and each group of holes 31 includes a first hole arranged along the first direction X 311 and the second hole 312.
  • the first hole 311 and the second hole 312 extend along the second direction Y.
  • the first terminal 212b of the adjacent cell 21 passes through the first hole 311
  • the second terminal 212c of the other cell 21 passes through the second hole 312
  • the welding portion 212a of the first terminal 212b and the welding portion of the second terminal 212c 212a are stacked on each other and connected to the first circuit board 30 .
  • each group of holes 31 further includes a third hole 313 , viewed along the third direction Z, the third hole 313 is located between the first hole 311 and the second hole 312 .
  • the projection of the third hole 313 overlaps with the projection of the first conductive sheet 32 .
  • the projection of the third hole 313 is located within the projection of the first conductive sheet 32 .
  • the first circuit board 30 is further provided with a second conductive sheet 33 .
  • the second conductive sheet 33 connects the electrode terminals 212 of the two battery cells 21 arranged along the second direction Y, and is used to transmit the current from the first column 21a to the second column 21b, realizing the first column 21a and the second column 21b connection in series or in parallel.
  • the thickness of the second conductive sheet 33 is greater than the thickness of the first conductive sheet 32 .
  • the first circuit board 30 is further provided with a plurality of first communication holes 34 , and along the third direction Z, the first communication holes 34 penetrate the first circuit board 30 . Some of the first communication holes 34 are arranged in a row along the second direction Y, and some of the first communication holes 34 are arranged in a row along the first direction X.
  • the first communication hole 34 allows the first insulating member 60 to flow into the battery pack 100 , so as to improve the efficiency of injecting the first insulating member 60 into the battery pack 100 .
  • the first circuit board 30 is further provided with a plurality of second communication holes 35, the plurality of second communication holes 35 are arranged in a row along the first direction X, and along the second direction Y, the plurality of second communication holes 35 It is located in the middle of the first circuit board 30 .
  • the battery pack 100 further includes a sampling wire harness 100a, and the sampling wire harness 100a is connected to the first circuit board 30 through a plurality of second communication holes 35 .
  • the battery pack 100 further includes a first electrical connection part 100b and a second electrical connection part 100c.
  • the first electrical connection part 100b and the second electrical connection part 100c are soldered to the first circuit board 30 .
  • the first circuit board 30 has a third area 30d and a fourth area 30e, the first electrical connection part 100b is soldered to the third area 30d, and the second electrical connection part 100c is soldered to the fourth area 30e.
  • the first circuit board 30 has a plurality of third communication holes 36 , and the first electrical connection part 100 b and the second electrical connection part 100 c can be connected to the first circuit board 30 through the third communication holes 36 .
  • the first electrical connection part 100b is connected to one of the first terminal 212b and the second terminal 212c, and the second electrical connection part 100c is connected to the other.
  • the first electrical connection part 100b and the second electrical connection part 100c are connected to the second circuit board 13, and the energy of the battery cell 21 is transmitted to the external device through the first electrical connection part 100b and the second electrical connection part 100c.
  • the first electrical connection part 100b and the second electrical connection part 100c include copper bars.
  • the first electrical connection part 100 b includes a first conductive part 102 and a first insulating part 103 .
  • the first conductive portion 102 includes a first section 102 a and a second section 102 b, and the first section 102 a is connected to the first circuit board 30 .
  • the first section 102a is welded to the third region 30d.
  • the first section 102 a is provided with a first connecting protrusion 1021 and a second connecting protrusion 1022 , and the first connecting protrusion 1021 and the second connecting protrusion 1022 are disposed in the third communication hole 36 .
  • the second section 102b may be a flexible structure.
  • the second section 102b includes a plurality of single sheets 1023 stacked.
  • the thickness of the second section 102b is 2 mm, and the thickness of each single piece 1023 is 0.1 mm.
  • the monolith 1023 includes a soft copper bus monolith.
  • the second section 102b includes a third structural member 1024 and a fourth structural member 1025, the third structural member 1024 extends in a direction opposite to the third direction Z and bends in a second direction Y, and the fourth structural member 1025 is connected to an end of the third structural member 1024 away from the first section 102a, and is folded in a direction opposite to the first direction X.
  • the first insulating part 103 covers the surface of the second section 102 b , and the end of the fourth structure 1025 away from the first section 102 a protrudes from the first insulating part 103 for connecting with the first connecting part 131 .
  • the first electrical connection part 100b and the second circuit board 13 are first assembled, specifically, the fourth structural member 1025 is first bent to roughly the third direction Z, then connect the fourth structural member 1025 to the first connecting part 131, connect the second housing 12 to the first housing 11, and drive the second housing 12 during the process of covering the first housing 11
  • the four structural members 1025 are bent from the third direction Z to a direction substantially opposite to the first direction X, and then the assembly of the first housing 11 and the second housing 12 is completed.
  • the state of the first electrical connection part 100b after the assembly of the first housing 11 and the second housing 12 is the initial state of the first electrical connection part 100b, which can reduce the length of the first electrical connection part 100b , thereby reducing the length of the energy circuit and reducing the weight of the first electrical connection part 100b.
  • the structure of the second electrical connection part 100c is the same as that of the first electrical connection part 100b, except that the bending direction is different.
  • the three directions extend in the direction opposite to Z and bend along the second direction Y, while the second electrical connection part 100c extends in the direction opposite to the third direction Z and bend in the direction opposite to the second direction Y.
  • the first circuit board 30 is further provided with a plurality of notches, and at least one electrode terminal 212 passes through the notches and is connected to the first circuit board 30 .
  • the first circuit board 30 includes a first side 301 and a second side 302 arranged along the first direction X
  • the notch 30a includes a first notch 301a and a second notch 301b
  • the two notches 301b are disposed on the first side 301 along the second direction Y.
  • the electrode terminal 212 adjacent to the battery cell 21a-1 and the battery cell 21b-1 passes through the first gap 301a and connects to the second conductive sheet 33
  • the electrode terminal 212 adjacent to the battery cell 21b-1 and the battery cell 21a-1 passes through
  • the second notch 301b is connected to the second conductive sheet 33 .
  • the first notch 301a and the second notch 301b are communicated with each other.
  • the notch 30a further includes a third notch 301c, the third notch 301c is disposed on the second side 302, and the electrode terminal 212 of the cell 21a-7 away from the cell 21b-7 passes through the third notch 301c and is connected to The first electrical connection part 100b.
  • the notch 30a further includes a fourth notch 301d, the fourth notch 301d is disposed on the second side 302, and the third notch 301c and the fourth notch 301d are disposed on both sides of the second side 302 along the second direction Y. end.
  • the electrode terminal 212 of the cell 21b-7 away from the cell 21a-7 passes through the fourth gap 301d and connects to the second electrical connection portion 100c.
  • the first structural member 40 has insulation.
  • the first structural member 40 is made of insulating material.
  • the first structural member 40 is made of metal material and insulating material, and the insulating material may cover the outer surface of the metal material.
  • the first structural member 40 includes a first main body 40 a, and the first main body 40 a covers the first circuit board 30 and insulates the first circuit board 30 .
  • the first structural member 40 is provided with a first opening 41 , and along the third direction Z, the first opening 41 penetrates the surface of the first main body 40 a.
  • the first electrical connection portion 100b extends to a side of the first structural member 40 away from the first circuit board 30 after passing through the first opening 41 .
  • the first structural member 40 is provided with a first protrusion 42 , and the first protrusion 42 is disposed on an edge of the first opening 41 , and the first electrical connection part 100b is positioned by the first protrusion 42 .
  • the projections of the bends of the first segment 102 a and the second segment 102 b are located within the projection of the first protrusion 42 .
  • the bends of the first section 102a and the second section 102b are insulated by the first protrusion 42, reducing the risk of short circuit occurring at the bends of the first section 102a and the second section 102b.
  • the projection of the first insulating portion 103 overlaps with the projection of the first convex portion 42, increasing the length of the first convex portion 42 along the third direction Z, and further improving the accuracy of the first section 102a. and the insulation at the bend of the second section 102b.
  • the first body 40 a is provided with a second opening 43 , and the second electrical connection part 100 c passes through the second opening 43 .
  • the first structural member 40 is provided with a second protrusion 44 , and the second protrusion 44 is disposed on an edge of the second opening 43 .
  • the second electrical connection part 100 c is positioned and insulated by the second protrusion 44 .
  • the first structural member 40 is provided with a plurality of fourth communication holes 45 arranged along the second direction Y, and the first insulating member 60 flows into the first structural member 40 and the first heat dissipation member through the fourth communication holes 45 Between 50.
  • the heat is transferred to the first heat sink 50 through the first insulating member 60 .
  • the projection of the fourth communication hole 45 is away from the projection of the first communication hole 34 .
  • the overlapping portion of the welding portion 212a of the adjacent cell 21 is at least partially located in the fourth communication hole 45 .
  • a first insulator 60 is disposed in the fourth communication hole 45 , and the heat is transferred to the first heat sink 50 through the first insulator 60 .
  • a third heat conduction pad 70 is provided between the first circuit board 30 and the first structural member 40 for transferring heat from the first circuit board 30 to the first circuit board 30.
  • a structural member 40 .
  • the heat of the first circuit board 30 includes the heat of the welding portion 212a and the heat of the first conductive sheet 32 and the second conductive sheet 33.
  • the projection of the fourth communication hole 45 is located within the projection of the third thermal pad 70 .
  • the fourth communication hole 45 is covered by the third heat conduction pad 70 to reduce the risk of a short circuit with the first circuit board 30 through the fourth communication hole 45 .
  • a first insulator 60 is provided in the fourth communication hole 45, and after the heat of the first circuit board 30 is transferred to the third thermal pad 70, it can pass through the first insulator 60 in the fourth communication hole 45 faster. The heat is transferred to the first heat sink 50 to improve heat dissipation.
  • a third protrusion 46 is provided on the side of the first structural member 40 opposite to the first circuit board 30 , and along the third direction Z, the projection of the third protrusion 46 is located on the opposite side of the second direction Y. Between adjacent first conductive sheets 32 , it is used to locate the position of the first structural member 40 .
  • the first structural member 40 includes a fourth protrusion 47 connected to the edge of the first main body 40a.
  • the projection of the fourth protrusion 47 overlaps with the projection of the first circuit board 30, and the position where the first structural member 40 is connected to the first circuit board 30 is limited by the fourth protrusion 47, so as to facilitate Assemble.
  • the projection of the first circuit board 30 is located within the projection of the fourth protrusion 47 .
  • the projection of the fourth protrusion 47 overlaps with the projection of the battery case 211 and the electrode terminal 212 , so as to insulate the electrode terminal 212 .
  • the projection of the welding portion 212a is located within the projection of the fourth protrusion 47 to further strengthen the insulation.
  • the first structure member 40 is provided with a third opening 48 for passing the sampling wire harness 100a.
  • the first heat sink 50 has a plurality of first channels 50 a arranged in a row along the second direction Y.
  • the first heat sink 50 has a fourth opening 51 .
  • one of the two outermost first passages 50 a arranged along the second direction Y communicates with the fourth opening 51 .
  • the first heat sink 50 is provided with a fifth opening 52, and the fifth opening 52 communicates with another first channel 50a located on the outermost side.
  • the first protrusion 42 is arranged in the fourth opening 51, and along the third direction Z, the projection of the first protrusion 42 is located in the fourth opening. within the projection of opening 51 .
  • the first electrical connection part 100 b passes through the fourth opening 51 .
  • the first heat sink 50 is provided with a sixth opening 53 through which the sampling wire harness 100a passes.
  • a fourth insulator is provided inside the fourth opening 51 and the sixth opening 53 to close the fourth opening 51 and the sixth opening 53, so that when the first insulator 60 is injected, the first insulator 60 can be reduced.
  • the fourth insulator includes resin, and after the resin is heated and melted, the flowable fourth insulator is provided in the fourth opening 51 and the sixth opening 53 by means of pouring, and then fixed and formed.
  • the fourth insulating member includes quick-drying glue, and the hardness of the quick-drying glue after curing is 30A.
  • the tensile strength of the quick-drying adhesive is 0.97MPa.
  • the adhesive strength of the quick-drying glue is 0.5MPa.
  • the breakdown voltage of the quick-drying adhesive is 21kV/mm.
  • the volume resistivity of the quick-drying adhesive is 8.5x10 15 ⁇ cm.
  • the temperature range of quick-drying glue is 40-200°C, which can be 40°C, 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, 110°C, 120°C, 130°C, 140°C, 150°C , 160°C, 170°C, 180°C, 190°C, 200°C.
  • the two outermost first passages 50a arranged along the second direction Y are provided with fourth protrusions 54 inside, and the fourth protrusions 54 are in contact with the first protrusions 42, so that the first protrusions can be aligned with each other. 42 for positioning, and then for positioning the first electrical connection part 100b, and a space may be reserved for injecting the fourth insulating member.
  • the first heat sink 50 has a third side wall 50 d and a fourth side wall 50 e disposed along the first direction X.
  • the fourth connecting hole 502 is disposed on the third side wall 50d and the fourth side wall 50e.
  • the third side wall 50d is provided with a first insulating portion 55, the first insulating portion 55 is disposed between the third side wall 50d and the first wall 111, and can fill the gap between the third side wall 50d and the first wall 111, The flow of the first insulating member 60 between the third side wall 50d and the first wall 111 is reduced.
  • the first heat sink 50 and the first case 11 may also be insulated.
  • the first insulating part 55 includes foam.
  • the surface of the foam connecting the third side wall 50d and the first wall 111 has glue, which can be bonded to the third side wall 50d and the first wall 111 .
  • the foam is compressed and disposed between the third side wall 50d and the first wall 111 , which can strengthen and seal the gap between the third side wall 50d and the first wall 111 .
  • the fourth side wall 50e is provided with a second insulating portion 56, and the second insulating portion 56 is disposed between the fourth side wall 50e and the second wall 112, and can fill the gap between the fourth side wall 50e and the second wall 112.
  • the flow of the first insulating member 60 between the fourth side wall 50e and the second wall 112 is reduced.
  • the first heat sink 50 and the first case 11 may also be insulated.
  • the second insulating part 56 includes foam.
  • the surface of the foam connecting the fourth side wall 50 e and the second wall 112 has glue, which can be bonded to the fourth side wall 50 e and the second wall 112 .
  • the foam is compressed and disposed between the fourth side wall 50e and the second wall 112 , which can strengthen and seal the gap between the fourth side wall 50e and the second wall 112 .
  • the outer surface of the first heat sink 50 includes a metal material layer, which is good for heat dissipation, such as aluminum.
  • the first heat sink 50 is made of a metal material, and the outer surface of the first heat sink 50 may be coated with an insulating layer.
  • the first heat sink 50 is made of a metal material, and the outer surface of the first heat sink 50 includes a metal material layer.
  • the first heat sink 50 includes a bottom wall 50f and a top wall 50g, a third side wall 50d connects the bottom wall 50f and the top wall 50g, and a fourth side wall 50e connects the bottom wall 50f and the top wall 50g.
  • the outer surface of the bottom wall is coated with a first insulating layer 50h.
  • the third side wall 50d includes a third side wall extension 50i extending out of the bottom wall 50f, and the surface of the third side wall extension 50i is coated with a second insulating layer 501i.
  • the fourth side wall 50e includes a fourth side wall extension 50j extending out of the bottom wall 50f, and the surface of the fourth side wall extension 50j is coated with a third insulating layer 501j.
  • the first circuit board 30 may be insulated by the first insulating layer 50h, the second insulating layer 501i, and the third insulating layer 501j.
  • FIG. 5 and FIG. 6 there is a first gap 104 between the first heat sink 50 and the first structural member 40, there is a second gap 105 between the first circuit board 30 and the first structural member 40, and the cell housing There is a third space 107 between 211 and the first casing 11 .
  • the first insulator 60 is filled in the first space 104 , the second space 105 and the third space 107 .
  • projections of the soldering portion 212 a , the first circuit board 30 , the third thermal pad 70 and the first structural member 40 are located within the projection of the first insulating member 60 .
  • the heat from the electrode terminals 212 and the first circuit board 30 is transferred to the first heat sink 50 through the first insulating member 60 , and the heat from the electrode terminals 212 and the first circuit board 30 is dissipated through the first channels 50 a.
  • the first space 104 is located between the fourth protrusion 47 and the third side wall extension 50i, and the first insulating member 60 flows through the first space 104 to between the first structural member 40 and the first heat sink 50 .
  • the width of the first space 104 along the first direction X is 0.5mm-3mm.
  • the width of the first space 104 along the first direction X is 1.5mm-2.8mm, which can be 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, Any one of 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm.
  • the width of the fourth gap 109 along the first direction X is 0.5mm-3mm.
  • the width of the first space 104 along the first direction X is 1.5mm-2.8mm, which can be 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, Any one of 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm.
  • the second space 105 is located between the first circuit board 30 and the first structural member 40 , and the first insulating member 60 flows to the second space 105 through the first communication hole 34 of the first circuit board 30 .
  • the third space 107 is located between the first circuit board 30 and the battery case 211 , and the first insulator 60 flows into the third space 107 through the first recess 221 a.
  • the first insulating member 60 when the first insulating member 60 is injected into the battery pack 100, the first insulating member 60 flows through the first recess 221a into the third space 107, the first space 104 and the fourth space 109, wherein the first space 104 and the fourth space 109 flow.
  • the first insulating member 60 in the fourth compartment 109 flows between the first structural member 40 and the first heat sink 50 , and the first insulating member 60 in the third compartment 107 flows to the second compartment 105 through the first communication hole 34 , and then flow between the first structural component 40 and the first heat dissipation component 50 through the fourth communication hole 45 .
  • a fourth space 111 a between the first heat sink 50 and the second circuit board 13 there is a fourth space 111 a between the first heat sink 50 and the second circuit board 13 .
  • the heat generated by the second circuit board 13 gathers in the fourth space 111a.
  • the first channel 50a dissipates heat
  • the temperature of the surface of the first heat sink 50 close to the second circuit board 13 is relatively low, and the heat generated by the second circuit board 13 is transferred to the surface of the first heat sink 50, which can heat the second circuit.
  • Plate 13 dissipates heat.
  • the heat of the cell casing 211 is transferred to the first casing 11 through the second heat sink 22 for heat dissipation, and the electrode terminals 212 and the first circuit board 30 are connected by the first insulating member 60 and the first heat sink 50 The heat is dissipated, and the second circuit board 13 is dissipated through the first heat dissipating member 50 to improve the heat dissipation of the battery pack 100 .
  • a fifth protrusion 57 is provided on the edge of the first cooling element 50 connected to the first structural component 40 .
  • the fifth space is formed by the fifth protrusion 57 and the bottom wall 50 f of the first heat sink 50 , and the soldering portion 212 a , the first circuit board 30 , the third thermal pad 70 and the first structural member 40 are disposed in the fifth space.
  • the first insulator 60 is disposed in the fifth space.
  • the inner surface of the fifth protrusion 57 is coated with a fourth insulating layer 50 k, which can insulate the first circuit board 30 and the electrode terminals 212 .
  • the present application also provides an electric device 200 using the above-mentioned battery pack 100 .
  • the electrical equipment 200 of the present application may be, but not limited to, drones, backup power sources, electric vehicles, electric motorcycles, electric power-assisted bicycles, electric tools, large household storage batteries, and the like.
  • the present application also provides a method for manufacturing the battery pack 100, which includes the following steps:
  • Step 1 Install the battery cell 21 , the first circuit board 30 , and the first heat sink 50 on the first housing 11 , and connect the first heat sink 50 to the first housing 11 ;
  • Step 2 injecting the fourth insulating member into the opening of the first heat sink 50 to close the first heat sink 50;
  • Step 3 After the fourth insulating part is cured, turn the first housing 11 upside down, inject flowing insulating material, and form the first insulating part 60 after the insulating material is cured;
  • Step 4 After the first insulating member is cured, connect the first electrical connection part 100 b and the second electrical connection part 100 c to the second circuit board 13 , and install the second housing 12 to the first housing 11 .
  • the step of connecting the first heat sink 50 to the first shell 11 in step 1 includes coating the first area 113a of the third wall 113 with the first shell Body insulator 1130, and connected to the first side wall 50b, the first shell insulator 1130 is located between the first region 113a and the first side wall 50b, the third wall 113 is connected to the first side wall 50b, reducing the The three walls 113 connect the gaps between the first side walls 50b.
  • Step 1 includes coating the second area 114a of the fourth wall 114 with a second housing insulator 1140 and connecting the second side wall 50c, the second housing insulator 1140 being located between the second area 114a and the second side wall 50c Between the fourth wall 114 and the second side wall 50c, the gap between the fourth wall 114 and the second side wall 50c is reduced.
  • the step of connecting the third wall 113 to the first side wall 50b includes passing the first fastener 113c through the first connecting hole 113b and the second connecting hole 501.
  • Step 1 includes passing the second fastener 1112 through the third connecting hole 1111 and the fourth connecting hole 502 to connect the first wall 111 to the third side wall 50d.
  • Step 1 includes passing the third fastener 1113 through the fifth connecting hole 1114 and the fourth connecting hole 502 to connect the second wall 112 to the fourth side wall 50e.
  • step 2 specifically includes: passing the first electrical connection part 100b through the fourth opening 51, the second electrical connection part 100c through the fifth opening 52 and the sampling wire harness 100a through the sixth opening 53, and then the second The fourth insulator is injected into the four openings 51 , the fifth opening 52 and the sixth opening 53 to close the first heat sink 50 .
  • step 3 specifically includes: turning the first housing 11 upside down, and injecting the first insulating member 60 into the first housing 11 . Further inject the first insulator 60 into the first shell 11 through the second channel 221b, the first insulator 60 flows to the first heat sink 50 and fills the first gap 104, the second gap 105, and the third gap 107 and the fourth space 109, make the first insulating member 60 cover the first structural member 40, the first circuit board 30 and the welding part 212a, then install the fifth wall 115, connect the fifth wall to the first wall 111, the second wall 112 , third wall 113 and fourth wall 114 .
  • step 4 specifically includes: installing the second circuit board 13 on the second housing 12, bending the first electrical connection part 100b and the second electrical connection part 100c, connect the first electrical connection part 100b to the first connection part 131, connect the second electrical connection part 100c to the second connection part 132, and then connect the second casing 12 to the first casing 11 to complete the assembly of the battery pack 100. Further, step 4 also includes injecting the third insulating member 123 between the second circuit board 13 and the second casing 12 and covering the second circuit board 13 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

一种电池组和具有该电池组的用电设备及电池组的制造方法,电池组(100)包括壳体组件(10)、电芯组件(20)、第一电路板(30)、第一散热件(50)、第一结构件(40)和第一绝缘件(60)。电芯组件(20)设于壳体组件(10)内。电芯组件(20)包括电芯(21)。电芯(21)包括电芯壳体(211)、设于电芯壳体(211)内的电极组件(213)以及连接至电极组件(211)并且从电芯壳体(211)引出的电极端子(212)。第一电路板(30)设于壳体组件(10)内并连接电极端子(212)。第一散热件(50)设于壳体组件(10)内。第一结构件(40)设于第一电路板(30)和第一散热件(50)之间。第一结构件(40)的外表面设有绝缘材料。第一绝缘件(60)至少部分设于第一结构件(40)和第一散热件(50)之间,第一结构件(40)和第一散热件(50)通过第一绝缘件(60)粘接。通过将第一绝缘件(60)设置于第一结构件(40)和第一散热件(50)之间,并粘接第一结构件(40)和第一散热件(50),改善电池组(100)的散热。

Description

电池组、电池组的制造方法及用电设备 技术领域
本申请涉及储能技术领域,尤其涉及一种电池组、电池组的制造方法及用电设备。
背景技术
电池在使用时,电池中的电路板会发出大量的热量,为避免电池温度过高需要对电池进行散热,传统的散热方式是在电芯间增加散热件,但该散热方式对电路板散热有限。
发明内容
有鉴于此,有必要提供一种电池组及用电设备,可提升对电路板的散热。
本申请的实施例提供了一种电池组,包括壳体组件、电芯组件、第一电路板、第一散热件、第一结构件和第一绝缘件。电芯组件设于壳体组件内。电芯组件包括电芯。电芯包括电芯壳体、设于电芯壳体内的电极组件以及连接至电极组件并且从电芯壳体引出的电极端子。第一电路板设于壳体组件内并连接电极端子。第一散热件设于壳体组件内。第一结构件设于第一电路板和第一散热件之间。第一结构件的外表面设有绝缘材料。第一绝缘件至少部分设于第一结构件和第一散热件之间,第一结构件和第一散热件通过第一绝缘件粘接。通过第一绝缘件第一结构件和第一散热件之间,并粘接第一结构件和第一散热件,改善电池组的散热。
可选地,在本申请的一些实施例中,通过将流动的绝缘材料注入电池组固化后形成第一绝缘件。
可选地,在本申请的一些实施例中,壳体组件、电芯组件、第一电路板、第一结构件和第一散热件通过第一绝缘件粘接连接。电池组受到外部的冲击力时,第一绝缘件可提升对电池组的保护,第一绝缘件具有较好的导热系数,有利于改善电池组的散热。
可选地,在本申请的一些实施例中,第一绝缘件覆盖电极端子位于电芯壳体外的部分,加强对电极端子的固定,提升对电极端子的散热。
可选地,在本申请的一些实施例中,电芯壳体包括第一部分和第二部分。第一部分容纳电极组件。第二部分连接第一部分。电极端子从第二部分伸出。第一绝缘件覆盖第二部分的至少部分,加强对第二部分的保护,提升对电芯壳体的散热。
可选地,在本申请的一些实施例中,壳体组件设有第一通孔和第二通孔。第一散热件设有第一通道。第一通道连通第一通孔和第二通孔。第一散热件将第一电路板和电芯组件的热量通过第一通道从第一通孔和第二通孔散到外部环境中,提升对第一电路板和电芯组件的散热,降低电池组的温度。
可选地,在本申请的一些实施例中,第一散热件设有第一绝缘部。第一绝缘部设于壳体组件的内表面和第一散热件之间。可填充壳体组件和第一散热件之间的间隙,减少第一绝缘件流到壳体组件和第一散热件之间,还可对壳体组件和第一散热件进行绝缘。
可选地,在本申请的一些实施例中,壳体组件包括第一壳体。第一壳体形成有第一空间。第一散热件设于第一空间内。第一壳体包括第一壁、第二壁、第三壁和第四壁。第一壁和第二壁沿第一方向相对设置。第三壁和第四壁沿第二方向相对设置。第一散热件连接第一壁、第二壁、第三壁和第四壁的内表面。
可选地,在本申请的一些实施例中,第一通孔设于第一壁。第二通孔设于第二壁。
可选地,在本申请的一些实施例中,电芯组件包括多个电芯。多个电芯沿第一方向堆叠设置。
可选地,在本申请的一些实施例中,第三壁设有第一区域。第一区域设有第一壳体绝缘件。第三壁和第一散热件通过第一壳体绝缘件粘接连接,可在第一壳体倒置注入第一绝缘件时,减少第一绝缘件在第一区域和第一侧壁之间的间隙内流动。第四壁设有第二区域。第二区域设有第二壳体绝缘件。第四壁和第一散热件通过第二壳体绝缘件粘接连接,可在第一壳体倒置注入第一绝缘件时,减少第一绝缘件在第二区域和第二侧壁之间的间隙内流动。
可选地,在本申请的一些实施例中,电池组还包括可被压缩的第一绝缘部和第二绝缘部。沿第一方向,第一绝缘部设于第一壁和第一散热件之间。第一绝缘部处于被压缩状态,可加强密封第三侧壁和第一壁之间的间隙,第二绝缘部设于第二壁和第一散热件之间。第一绝缘部处于被压缩状态,可加强密封第四侧壁和第二壁之间的间隙。
可选地,在本申请的一些实施例中,第一绝缘部包括泡棉。泡棉连接第一散热件和第一壁的表面具有胶水,可粘接于第一散热件和第一壁。
可选地,在本申请的一些实施例中,第二绝缘部包括泡棉。泡棉连接第一散热件和第二壁的表面具有胶水,可粘接于第一散热件和第二壁。
可选地,在本申请的一些实施例中,电池组还包括连接支架。壳体组件还包括第二壳体。第二壳体内设有第二电路板。第一壳体和第二壳体连接于连接支架。连接支架设于第二电路板和第一散热件之间。可减小第二电路板与第一散热件之间短路的风险。
可选地,在本申请的一些实施例中,连接支架设有支架通孔连接支架和第一散热件之间形成有第二空间。支架通孔连通第二空间。有利于对第二电路板进行散热。
本申请的实施例还提供了一种电池组,包括壳体组件、电芯组件和两个第二散热件。电芯组件设于壳体组件内。电芯组件包括多个沿第一方向堆叠设置的电芯。电芯包括电芯壳体、设于电芯壳体内的电极组件以及连接至电极组件并且从电芯壳体引出的电极端子。两个第二散热件设于相邻的电芯之间。每个 第二散热件包括第一部件和第一凹部。沿第一方向,第一部件的投影与电芯壳体的投影至少部分重叠。第一部件设于沿第一方向相邻的电芯之间,可对相邻的电芯进行散热。沿第一方向,两个第一凹部相对设置形成第二通道,便于将第一绝缘件从电芯的底部注入电池组内。
可选地,在本申请的一些实施例中,部分电芯沿第一方向堆叠设置为第一列。部分电芯沿第一方向堆叠设置为第二列。第一列与第二列沿垂直于第一方向的第二方向排列设置。第二散热件包括两个第一部件。其中一个第一部件位于第一列电芯相邻电芯之间。另外一个第一部件位于第二列电芯相邻电芯之间,第一凹部连接两个第一部件。通过两个第一部件同时对第一列电芯和第二列电芯进行散热。
可选地,在本申请的一些实施例中,第一凹部位于第一列电芯的电芯壳体和第二列电芯的电芯壳体之间。
可选地,在本申请的一些实施例中,电芯壳体包括第一部分和第二部分。第一部分容纳电极组件。第二部分连接第一部分。电极端子从第二部分伸出。第二部分包括第一密封部和第二密封部。电极端子自第一密封部伸出第一部分。沿第一方向,第一凹部的投影与靠近第一凹部的第二密封部投影有重叠。
可选地,在本申请的一些实施例中,第二密封部和靠近第二密封部的第一凹部的朝向同一个方向弯折。
可选地,在本申请的一些实施例中,沿第三方向,第二密封部的投影和第一凹部的投影相离。第三方向同时垂直于第一方向和第二方向。
可选地,在本申请的一些实施例中,第二散热件还包括第二部件。第二部件连接第一部件的侧边。第二部件从相邻的电芯之间伸出并朝向电芯弯折。第二部分连接电芯壳体。通过设置第二部件接触连接电芯壳体,增加第二散热件与电芯壳体的接触面积,将热量通过电芯壳体传导至第二部件,再由第二部件传导至第一壳体,提升对电芯的散热效果。
可选地,在本申请的一些实施例中,第二散热件还包括两个沿第二方向设 置的第二部件。第二部分连接到电芯壳体沿第二方向设置的两侧,使电芯壳体的周边均设有第二部件,进一步提升对电芯的散热效果。
可选地,在本申请的一些实施例中,第二部件和电极端子沿第三方向设置。沿第三方向观察,第二部件覆盖电芯壳体的至少部分。
可选地,在本申请的一些实施例中,相邻的第一部件之间设有弹性件。电芯膨胀时,弹性件可被压缩,为电芯提供膨胀空间。
可选地,在本申请的一些实施例中,电芯壳体包括第一外壳和第二外壳。第一外壳连接第二外壳。第一外壳和第二外壳沿连接位置可以进行折叠,使第一外壳和第二外壳重合,形成第一部分,以包覆电极组件。第一外壳的周侧向外延伸形成多个第一延伸部。第二外壳的周侧向外延伸形成多个第二延伸部。第一外壳和第二外壳沿连接位置折叠后,第一延伸部和第二延伸部重合并密封连接,形成第二部分。
可选地,在本申请的一些实施例中,还包括第一绝缘件。第一绝缘件通过将流动的绝缘材料通过第二通道注入电池组固化后形成。通过第一绝缘件改善电池组的散热。
本申请一实施例还提供了一种电池组,包括壳体组件、电芯组件、第一电路板、第一散热件、第一电连接部和第一结构件。电芯组件设于壳体组件内,电芯组件包括多个沿第一方向堆叠设置的电芯,电芯包括电芯壳体、设于电芯壳体内的电极组件以及连接至电极组件并且从电芯壳体引出的电极端子。第一电路板设于壳体组件内并连接电极端子。第一散热件,连接壳体组件的内表面。第一电连接部包括第一导电部和第一绝缘部,第一导电部包括第一区段和第二区段,第一区段连接第一电路板,第二区段显露于第一绝缘部。第一结构件包括第一主体,第一主体设于第一电路板和第一散热件之间,第一结构件设有第一开口,第一开口贯穿第一主体的表面,第一电连接部穿过第一开口后延伸到第一结构件远离第一电路板的一侧,第一结构件设有第一凸部,第一凸部设于第一开口的边缘,第二区段收容于第一凸部内,通过第一凸部对第二区段弯折 处进行绝缘,降低第二区段弯折处发生短路的风险。
可选地,在本申请的一些实施例中,第一绝缘部至少部分收容于第一凸部内,增加第一凸部的长度,进一步提升对第二区段弯折处的绝缘。
可选地,在本申请的一些实施例中,第一散热件设有第四开口。第一凸部设于第四开口内。第一电连接部穿过第四开口。
可选地,在本申请的一些实施例中,电池组还包括第二电路板。第一电连接部穿过第四开口后连接第二电路板。
可选地,在本申请的一些实施例中,第二电路板包括具有电池管理系统的电路板。
可选地,在本申请的一些实施例中,壳体组件包括沿第一方向排列设置的第一壁和第二壁。第一壁设有第一通孔。第二壁设有第二通孔。第一散热件设有第一通道。第一通道连通第一通孔和第二通孔。第一散热件将第一电路板和电芯组件的热量通过第一通道从第一通孔和第二通孔散到外部环境中,提升对第一电路板和电芯组件的散热,降低电池组的温度。
可选地,在本申请的一些实施例中,第四开口内设有第四绝缘件,用于封闭第四开口,可在注入第一绝缘件时,减少第一绝缘件从第四开口流出。
可选地,在本申请的一些实施例中,第一散热件设有多个沿第二方向排列的第一通道。第二方向垂直于第一方向。沿第二方向设置的最外侧的两个第一通道内设有第四凸部。第四凸部接触连接第一凸部。可对第一凸部进行定位,进而对第一电连接部进行定位,并且可预留空间,便于注入第四绝缘件。
本申请一实施例还提供了一种电池组,包括壳体组件、电芯组件、第一电路板、第一散热件和第一电连接部。电芯组件设于壳体组件内。电芯组件包括多个沿第一方向堆叠设置的电芯。电芯包括电芯壳体、设于电芯壳体内的电极组件以及连接至电极组件并且从电芯壳体引出的电极端子。第一电路板设于壳体组件内并连接电极端子。第一散热件连接壳体组件的内表面。第一电连接部焊接于第一电路板。第一电连接部包括第一导电部和第一绝缘部。第一导电部 包括第一区段和第二区段。第一区段连接第一电路板。第二区段显露于第一绝缘部。第二区段包括多个层叠设置的单片。通过第一散热件改善电池组的散热,并将第二区段设置为软性结构,便于弯折第一电连接部,减少能量回路的长度,且可减轻第一电连接部的重量。
可选地,在本申请的一些实施例中,单片包括软铜排单片。
可选地,在本申请的一些实施例中,第二区段包括第三结构件和第四结构件。第三结构件沿与第三方向相反的方向延伸并沿第二方向弯折。第四结构件连接第三结构件远离第一区段的一端,并沿与第一方向相反的方向折叠,第一方向同时垂直于第二方向和第三方向。
可选地,在本申请的一些实施例中,还包括第二电路板。第二电路板设有第一连接部。第四结构件远离第一区段的一端凸出第一绝缘部,用于连接第一连接部。
可选地,在本申请的一些实施例中,第一散热件设有第四开口。第一电连接部穿过第四开口。
可选地,在本申请的一些实施例中,第一电连接部穿过第四开口后连接第二电路板。
可选地,在本申请的一些实施例中,第二电路板包括具有电池管理系统的电路板。
可选地,在本申请的一些实施例中,还包括第一绝缘件。通过将可流动的绝缘材料设于壳体组件内后固化形成,第一绝缘件位于第一散热件和电芯壳体之间,通过第一绝缘件改善电池组的散热。
本申请一实施例还提供了一种电池组,包括壳体组件、电芯组件、第一电路板、第一散热件和第一结构件。壳体组件包括沿第一方向排列设置的第一壁和第二壁。电芯组件设于壳体组件内。电芯组件包括多个沿第一方向堆叠设置的电芯。电芯包括电芯壳体、设于电芯壳体内的电极组件以及连接至电极组件并且从电芯壳体引出的电极端子。第一电路板设于壳体组件内并连接电极端子。 第一散热件连接壳体组件的内表面。第一结构件包括第一主体连接于第一主体边缘的第四凸起。第一主体设于第一电路板和第一散热件之间。沿第一方向,第四凸起设于第一电路板的侧边,第四凸起的投影与第一电路板的投影有重叠,通过第四凸起限制第一结构件连接第一电路板的位置,便于组装。
可选地,在本申请的一些实施例中,沿第一方向,第一电路板的投影位于第四凸起的投影内。
可选地,在本申请的一些实施例中,第一电路板设置于缺口。至少一个电极端子通过缺口后连接于第一电路板。沿第一方向,第四凸起覆盖电极端子的至少部分。
可选地,在本申请的一些实施例中,沿第一方向,第四凸起的投影覆盖电极端子位于电芯壳体外的部分,可对电极端子进行绝缘。
可选地,在本申请的一些实施例中,部分电芯沿第一方向堆叠设置为第一列。部分电芯沿第一方向堆叠设置为第二列。第一列与第二列沿第二方向排列设置。第二方向垂直于第一方向。第一电路板还设有第二导电片。第二导电片连接沿第二方向排列设置的两个电芯的两个电极端子,用于将电流从第一列传递至第二列,两个电极端子通过缺口。
可选地,在本申请的一些实施例中,沿第一方向,第四凸起的投影覆盖第二导电片的投影,对第二导电片进行绝缘。
可选地,在本申请的一些实施例中,电池组还包括第一电连接部和第二电连接部。第一电连接部和第二电连接部焊接于第一电路板。电极端子包括极性相反的第一端子和第二端子。第一电连接部连接电芯的第一端子和第二端子中的一个。第二电连接部连接相邻电芯的另一个。第一端子和第二端子通过缺口后连接于第一电路板。第一主体覆盖第一电连接部焊接于第一电路板的区域。第一主体覆盖第二电连接部焊接于第一电路板的区域。对第二电连接部连接第一电路板的区域进行绝缘。
可选地,在本申请的一些实施例中,沿第一方向,第四凸起的投影覆盖第 一端子位于电芯壳体外的部分,对第一端子进行绝缘。
可选地,在本申请的一些实施例中,沿第一方向,第四凸起的投影覆盖第二端子位于电芯壳体外的部分,对第二端子进行绝缘。
可选地,在本申请的一些实施例中,第一电路板设有多组孔。每组孔包括第一孔和第二孔。第一电路板设有多个第一导电片。相邻电芯的第一端子穿过第一孔。另一电芯的第二端子穿过第二孔。第一端子的焊接部和第二端子的焊接部相互堆叠后焊接于第一导电片上。第一结构件相对第一电路板的一侧设有第三凸部。沿第三方向,第三凸部的投影位于沿第二方向设置的相邻的第一导电片之间,第三方向同时垂直于第一方向和第二方向,用于定位第一结构件的位置,使第一结构件与第一电路板之间具有间隙,便于第一绝缘件流入。
可选地,在本申请的一些实施例中,还包括第一绝缘件。第一绝缘件通过将可流动的绝缘材料设于壳体组件内后固化形成。第一绝缘件位于第一散热件和电芯壳体之间,并覆盖第一电路板、第一结构件和电极端子,通过第一绝缘件对第一电路板、第一结构件和电极端子进行固定和绝缘。
本申请一实施例还提供了一种电池组,包括壳体组件、电芯组件、第一电路板、第一散热件、第一结构件和第一绝缘件。电芯组件设于壳体组件内。电芯组件包括多个电芯。电芯包括电芯壳体、设于电芯壳体内的电极组件以及连接至电极组件并且从电芯壳体引出的电极端子。电极端子包括焊接部。相邻电芯的焊接部叠置设置。第一电路板设于壳体组件内并连接焊接部。第一散热件连接壳体组件的内表面。第一电路板和第一散热件沿第三方向设置。第一结构件设于第一电路板和第一散热件之间。第一结构件的外表面设有绝缘材料,第一结构件设有第四连通孔。沿第三方向,相邻电芯的焊接部叠置的部分的投影和第四连通孔的投影有重叠。第一绝缘件至少部分位于第一结构件和第一散热件之间,以及第四连通孔内。第一绝缘件通过第四连通孔流入第一结构件和第一散热件之间。通过第一绝缘件将热量传递至第一散热件,改善电池组的散热。
可选地,在本申请的一些实施例中,可流动的绝缘材料通过第四连通孔流 入第一结构件和第一散热件之间形成第一绝缘件。
可选地,在本申请的一些实施例中,第一电路板还设有多个第一连通孔。沿第三方向,第一连通孔贯穿第一电路板。第一连通孔可供第一绝缘件流入电池组内,提升第一绝缘件注入电池组的效率。
可选地,在本申请的一些实施例中,电极端子包括极性相反的第一端子和第二端子。第一端子和第二端子中的一个为正极端子。另一个为负极端子。第一电路板设有多组孔。每组孔包括沿第一方向设置的第一孔和第二孔。第一孔和第二孔沿第二方向延伸设置。相邻电芯的第一端子穿过第一孔。另一电芯的第二端子穿过第二孔。第一端子的焊接部和第二端子的焊接部相互堆叠后连接第一电路板。第一方向同时垂直于第二方向和第三方向。
可选地,在本申请的一些实施例中,第一电路板设有多个第一导电片。第一导电片连接第一电路板并设于第一孔和第二孔。相邻电芯的第一端子穿过第一孔。另一电芯的第二端子穿过第二孔。第一端子的焊接部和第二端子的焊接部相互堆叠后焊接于第一导电片。
可选地,在本申请的一些实施例中,每组孔还包括第三孔。沿第三方向观察,第三孔位于第一孔和第二孔之间。沿第三方向,第三孔的投影位于第一导电片的投影内,可便于第一绝缘件从第三孔流入电池组内。
可选地,在本申请的一些实施例中,壳体组件设有第一通孔和第二通孔。第一散热件设有第一通道。第一通道连通第一通孔和第二通孔。第一散热件将第一电路板和电芯组件的热量通过第一通道从第一通孔和第二通孔散到外部环境中,提升对第一电路板和电芯组件的散热,降低电池组的温度。
可选地,在本申请的一些实施例中,沿第三方向,第四连通孔的投影与第一连通孔的投影相离。
可选地,在本申请的一些实施例中,第一绝缘件包括灌封胶。
本申请一实施例还提供了一种用电设备,包括上述任意实施例中的电池组。
本申请一实施例还提供了电池组的制造方法,包括以下步骤:将电芯、第 一电路板和第一散热件安装于第一壳体,并将第一散热件连接第一壳体。将第四绝缘件注入第一散热件上的开口,封闭第一散热件。第四绝缘件固化后,将第一壳体倒置,注入第一绝缘件。第一绝缘件固化后,将第一电连接部连接第二电路板,将第二壳体安装于第一壳体。
可选地,在本申请的一些实施例中,将第二壳体安装于第一壳体的步骤还包括将第三绝缘件注入第二电路板与第二壳体之间,并覆盖第二电路板。
上述的电池组通过将第一绝缘件由电芯组件背离第一散热件的一侧设于壳体组件内,并覆盖第一电路板、第一结构件和电极端子,通过第一绝缘件粘接连接壳体组件、电芯组件、第一电路板、第一结构件和第一散热件,改善电池组的散热。
附图说明
图1示出了一些实施例中电池组的结构示意图。
图2示出了一些实施例中电池组另一视角的结构示意图。
图3示出了一些实施例中电池组又一视角的结构示意图。
图4示出了一些实施例中电池组的分解示意图。
图5示出了图1中电池组沿III-III的剖面图。
图6示出了图5中电池组设有第一绝缘件的示意图。
图7示出了一些实施例中第三壁的结构示意图。
图8示出了一些实施例中第二壳体和第二电路板的示意图。
图9示出了一些实施例中第二壳体和第二电路板的分解示意图。
图10示出了一些实施例中单个电芯的结构示意图。
图11示出了一些实施例中单个电芯另一视角的结构示意图。
图12示出了一些实施例中单个电芯的分解示意图。
图13示出了一些实施例中多个电芯的结构示意图。
图14示出了一些实施例中多个电芯的分解示意图。
图15示出了一些实施例中第二散热件的结构示意图。
图16示出了一些实施例中多个电芯另一视角的结构示意图。
图17示出了一些实施例中电芯和第一电路板的结构示意图。
图18示出了一些实施例中第一电路板的结构示意图。
图19示出了一些实施例中第一电路板的分解结构示意图。
图20示出了一些实施例中第一电连接部的结构示意图。
图21示出了一些实施例中电池组打开状态的结构示意图。
图22示出了一些实施例中第一结构件的结构示意图。
图23示出了一些实施例中电芯、第一电路板和第一结构件的结构示意图。
图24示出了一些实施例中电芯、第一电路板和第一结构件另一视角的结构示意图。
图25示出了一些实施例中电池组拆去第一壳体和第二壳体的结构示意图。
图26示出了图25中电池组拆去第一壳体和第二壳体沿II-II的剖面示意图。
图27示出了图23中设有第一绝缘件的结构示意图。
图28示出了另一实施例中电池组沿III-III的剖面图。
图29示出了图25中电池组拆去第一壳体和第二壳体的分解示意图。
图30示出了一些实施例中第一散热件的结构示意图。
图31示出了一些实施例中另一视角的第一散热件的结构示意图。
图32示出了一些实施例中又一视角的第一散热件的结构示意图。
图33示出了一些实施例中再一视角的第一散热件的结构示意图。
图34示出了一些实施例中第一散热件沿第一方向视角的结构示意图。
图35示出了一些实施例中第一结构件和第一散热件的结构示意图。
图36示出了一些实施例中第一电路板、第一结构件和第一散热件的结构示意图。
图37示出了另一些实施例中第一散热件的结构示意图。
图38示出了图37中第一散热件的分解示意图。
图39示出了又一些实施例中第一散热件的结构示意图。
图40示出了又一些实施例中电池组拆去第一壳体和第二壳体的结构示意图。
图41示出了一些实施例中电池组拆去第五壁的结构示意图。
图42示出了一些实施例中第一壳体和电芯组件的结构示意图。
图43示出了一实施例中用电设备的结构示意图。
图44示出了一实施例中电池组的制造方法的流程示意图。
图45示出了一实施例中图44制造方法的具体步骤的流程示意图。
主要元件符号说明:
电池组                           100
壳体组件                         10
第一通孔                         10a
第一子通孔                       101
第二子通孔                       101b
第二通孔                         10b
第二空间                         10c
采样线束                         100a
第一电连接部                     100b
第一导电部                       102
第一区段                         102a
第一连接凸部                     1021
第二连接凸部                     1022
单片                             1023
第二区段                         102b
第三结构件                       1024
第四结构件                       1025
第一绝缘部                       103
第二电连接部                     100c
第一壳体                         11
第一壁                           111
第三连接孔                       1111
第二紧固件                       1112
第三紧固件                       1113
第五连接孔                       1114
第二壁                           112
第三壁                           113
第一区域                         113a
第一连接孔                       113b
第一紧固件                       113c
第四壁                           114
第二区域                         114a
第五壁                           115
第二壳体                         12
第二壳体凹部                     12a
底部                             12a-1
侧部                             12a-2
连接柱                           121
第二绝缘件                       122
第三绝缘件                       123
翅片                             124
第二电路板                       13
第一间隙                         13a
第一表面                         13b
第二表面                         13c
第一连接部                       131
第二连接部                       132
连接支架                         14
支架通孔                         141
电芯组件                         20
电芯                             21
第一列                           21a
第二列                           21b
第一组电芯                       21c
第一侧面                         21c-1
第二侧面                         21c-2
第三侧面                         21c-3
电芯壳体                         211
第一部分                         211a
第一外壳                         2111
第二外壳                         2112
第一延伸部                       2113
第二延伸部                       2114
第一密封部                       2115
第二密封部                       2116
第二部分                         211b
电极端子                         212
焊接部                           212a
第一端子                         212b
第二端子                         212c
第二散热件                       22
第一部件                         221
第二间隙                         2211
第一凹部                         221a
第二通道                         221b
第二部件                         222
第一导热垫                       222a
第二结构件                       221c
第一电路板                       30
第一侧边                         301
第二侧边                         302
第一缺口                         301a
第二缺口                         301b
第三缺口                         301c
第四缺口                         301d
第三区域                         30d
第四区域                         30e
孔                               31
第一孔                           311
第二孔                           312
第三孔                           313
第一导电片                       32
第二导电片                       33
第一连通孔                       34
第二连通孔                       35
第三连通孔                       36
第一结构件                       40
第一主体                         40a
第一开口                         41
第一凸部                         42
第二开口                         43
第二凸部                         44
第四连通孔                       45
第三凸部                         46
第四凸起                         47
第三开口                         48
第一散热件                       50
第一通道                         50a
第一侧壁                         50b
第二连接孔                       501
第四连接孔                       502
第二侧壁                         50c
第三侧壁                         50d
第四侧壁                         50e
底壁                             50f
顶壁                             50g
第一绝缘层                       50h
第三侧壁延伸部                   50i
第二绝缘层                       501i
第四侧壁延伸部                   50j
第三绝缘层                       501j
第四绝缘层                       50k
第四开口                         51
第五开口                         52
第六开口                         53
第一绝缘部                       55
第二绝缘部                       56
第五凸部                         57
第一间隔                         104
第二间隔                         105
第三间隔                         107
第四间隔                         109
第一绝缘件                       60
第三导热垫                       70
用电设备                         200
第一方向                         X
第二方向                         Y
第三方向                         Z
如下具体实施例将结合上述附图进一步说明本申请。
具体实施方式
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。
当一个组件被认为是“设于”另一个组件,它可以是直接设在另一个组件上或者可能同时存在居中的组件。当一个组件被认为是“连接”另一个组件,它可以是直接连接在另一个组件上或者可能同时存在居中的组件。
除非另有定义,本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术 语只是为了描述具体的实施例的目的,不是旨在于限制本申请。本文所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。
可以理解,当两元件平行/垂直设置时,两元件之间的夹角允许存在0-±5%的公差,例如当两元件垂直存在公差时,其中一元件向靠近或远离另一元件倾斜,两元件之间的公差范围大于0°且小于或等于4.5°。当两元件的投影相同或重叠时,两元件之间允许存在0-±10%的公差,例如其中一个元件与另一元件的投影形状相同,投影存在0-±10%的公差。
下面结合附图,对本申请的一些实施方式作详细说明。在不冲突的情况下,下述的实施方式及实施方式中的特征可以相互组合。
请参阅图1至图6,本申请一实施例提供了一种电池组100,包括壳体组件10、电芯组件20、第一电路板30、第一结构件40和第一散热件50。电芯组件20设于壳体组件10内。第一电路板30设于壳体组件10内并连接电芯组件20。第一结构件40设于第一电路板30和第一散热件50之间。壳体组件10设有第一通孔10a和第二通孔10b,第一通孔10a和第二通孔10b连通外部。第一散热件50设有第一通道50a,第一通道50a连通第一通孔10a和第二通孔10b。第一散热件50将第一电路板30和电芯组件20的热量通过第一通道50a从第一通孔10a和第二通孔10b散到外部环境中,提升对第一电路板30和电芯组件20的散热,降低电池组100的温度。
在一实施例中,电池组100可以利用外部的空气,通过空气的流动带走第一电路板30和电芯组件20的热量。在一实施例中,电池组100可以用于使用时处于静态的设备上,当电池组100处于静态时,可以利用自然风或者外部风冷设备进行散热。在一实施例中,电池组100可以用于使用时处于动态的设备上,例如无人机、电动助力车等,由于设备移动时,空气流动速度更快,可以实现电池组100的快速散热。
在一实施例中,壳体组件10包括第一壳体11和第二壳体12,第一壳体11连接第二壳体12。第一壳体11包括第一壁111、第二壁112、第三壁113、第 四壁114和第五壁115。第一壁111和第二壁112相对设置,第三壁113和第四壁114相对设置。第五壁115与第二壳体12相对设置。第一壁111连接第三壁113和第四壁114,第二壁112连接第三壁113和第四壁114,第五壁115连接第一壁111、第二壁112、第三壁113和第四壁114,以形成第一空间,第一空间用于容纳电芯组件20、第一电路板30、第一结构件40和第一散热件50中至少一个组件。在本实施例中,电芯组件20、第一电路板30、第一结构件40和第一散热件50均容纳于第一空间内。其他实施例中,电芯组件20、第一电路板30、第一结构件40和容纳于第一空间内,第一散热件50的部分容纳于第一空间内。在再一实施例中,电芯组件20容纳于第一空间内,电芯组件20、第一电路板30、第一结构件40和第一散热件50设于第一空间外。
为了更好的对电池组100的结构进行说明,将结合X、Y、Z坐标轴对电池组100的结构进行叙述,X、Y、Z坐标轴两两垂直,定义X方向为第一方向,Y方向为第二方向,Z方向为第三方向,其中,第一方向X为第一壁111和第二壁112的相对设置的方向,第二方向Y为第三壁113和第四壁114相对设置方向,第三方向Z为第二壳体12和第五壁115的相对设置方向,第一方向X同时垂直于第二方向Y和第三方向Z。
第一通孔10a设在第一壁111上,第二通孔10b设在第二壁112上。沿第一方向X,第一通孔10a贯穿第一壁111,第二通孔10b贯穿第二壁112。第一散热件50连接第一壁111、第二壁112、第三壁113和第四壁114的内表面,第一通道50a连通第一通孔10a和第二通孔10b。当电池组100沿与第一方向X相反移动或外部风冷设备的风向沿第一方向X时,第一通孔10a为进风口,第二通孔10b为出风口,空气从第一通孔10a进入经过第一通道50a,并从第二通孔10b流出,提升散热。可以理解的是,当电池组100沿与第一方向X相反的方向移动或外部风冷设备的风向朝向第一方向X方向时,第一通孔10a为出风口,第二通孔10b为进风口。可选的,第一通孔10a还可以设于第三壁113,第二通孔10b还可以设于第四壁114。可选的,第二通孔10b设于第二壁112, 第一通孔10a还可以设于第三壁113。
在一实施例中,沿第一方向X,第一通孔10a的投影与第二通孔10b的投影重叠。可以理解的是,沿第一方向X,第一通孔10a的投影与第二通孔10b的投影有部分重叠,或者第一通孔10a的投影完全覆盖第二通孔10b的投影,或者第二通孔10b的投影完全覆盖第一通孔10a的投影。在本申请的一种具体实现方式中,沿第一方向X,第一通孔10a的投影大于且覆盖第二通孔10b的投影。当电池组100沿与第一方向X相反的方向移动或外部风冷设备的风向沿第一方向X时,第一通孔10a为进风口,第二通孔10b为出风口,通过第一通孔10a的孔径大于第二通孔10b的孔径,增强气流对流,进一步提升散热。
在一实施例中,电池组100还包括第一绝缘件60,第一绝缘件60将壳体组件10、电芯组件20、第一电路板30、第一结构件40和第一散热件50粘接连接。电池组100受到外部的冲击力时,第一绝缘件60可提升对电池组100的保护。可选的,第一绝缘件60具有较好的导热系数,有利于改善电池组100的散热,第一绝缘件60的导热系数为B,其中0.8w/mk<B≤3.0w/mk。
在一实施例中,通过将流动的绝缘材料注入电池组100固化后形成第一绝缘件60。可选的,第一绝缘件60包括灌封胶、发泡胶和粘接剂中的一种。可选的,第一绝缘件60包括树脂,将树脂加热融化后,通过灌注的方式将可流动的树脂设于电池组100后固化形成。可选的,第一绝缘件60包括灌封胶,通过灌注的方式将可流动的灌封胶设于电池组100后固化形成。灌封胶固化后的硬度为55-70A。灌封胶的使用温度范围为40~120℃,可以为40℃、50℃、60℃、70℃、80℃、90℃、100℃、110℃、120℃中的任意一个。在一实施例中,在第一壳体11内安装电芯组件20、第一电路板30、第一结构件40和第一散热件50,并将第一散热件50连接至第一壳体11,然后将第一壳体11倒置,将流动的树脂或灌封胶注入电池组100内,倒置后第一散热件50、第一结构件40、第一电路板30依次设置。可选的,流动的树脂或灌封胶从电芯组件20的底部沿第三方向Z注入电池组100内。
在一实施例中,电芯组件20包括电芯21,电芯21包括电芯壳体211、设于电芯壳体211内的电极组件213以及连接至电极组件213并且从电芯壳体211引出的电极端子212。在一实施例中,电芯壳体211包括第一部分211a和第二部分211b,第一部分211a容纳电极组件213,第二部分211b连接第一部分211a,电极端子212从第二部分211b伸出。可选的,第一绝缘件60设于第一散热件50和电芯壳体211之间,第一绝缘件60覆盖第一电路板30、第一结构件40以及电芯组件20的部分。
请参阅图4、图10、图11和图12、图13和图14,在一实施例中,电芯壳体211包括第一外壳2111和第二外壳2112,第一外壳2111连接第二外壳2112。第一外壳2111和第二外壳2112沿连接位置可以进行折叠,使第一外壳2111和第二外壳2112重合,形成第一部分211a,以包覆电极组件213。第一外壳2111的周侧向外延伸形成多个第一延伸部2113,第二外壳2112的周侧向外延伸形成多个第二延伸部2114。第一外壳2111和第二外壳2112沿连接位置折叠后,第一延伸部2113和第二延伸部2114重合并密封连接,形成第二部分211b。第二部分211b包括第一密封部2115和第二密封部2116,第一密封部2115与连接位置相对设置,电极端子212自第一密封部2115伸出第一部分211a。可选的,第二部分211b包括两个第二密封部2116,两个第二密封部2116沿第二方向Y相对设置。可选的,第二部分211b包括一个第一密封部2115,电芯21包括两个电极端子212,两个电极端子212自第一密封部2115延伸出电芯壳体211。在其他实施例中,第一外壳2111和第二外壳2112相离,第二部分211b包括两个第一密封部2115,两个第一密封部2115沿第三方向Z相对设置,电芯21包括两个电极端子212,其中一个电极端子212自其中一个第一密封部2115延伸出电芯壳体211,另外一个电极端子212自另外一个第一密封部2115延伸出电芯壳体211,两个电极端子212沿第三方向Z相对设置。
在一实施例中,第一绝缘件60覆盖电极端子212延伸出电芯壳体211的部分,加强对电极端子212的固定,提升对电极端子212的散热。
在一实施例中,第一绝缘件60覆盖电极端子212延伸出电芯壳体211的部分和至少部分第一密封部2115,加强对第一密封部2115的保护,提升对电芯壳体211的散热。
在一实施例中,电极组件213包括由正极片、负极片以及隔离膜卷绕形成的卷绕式结构。在另一些实施例中,电极组件213还可以为叠片结构,即,正极片、隔离膜和负极片依次层叠形成一个电极组件213单元,多个电极组件213单元再层叠成电极组件213。可选的,电芯壳体211包括铝塑膜。可选的,电芯21包括软包电芯。可选的,电芯组件20包括沿第一方向X堆叠设置的多个电芯21。可选的,电芯组件20包括多个电芯21,其中部分电芯21沿第一方向X堆叠设置为第一列21a,部分电芯21沿第一方向X堆叠设置为第二列21b,第一列21a与第二列21b沿第二方向Y排列设置。第一列21a至少包括依次设置的电芯21a-1和电芯21a-2。第二列21b至少包括依次设置的电芯21b-1和电芯21b-2,电芯21a-1和21b-1沿第二方向Y排列设置,电芯21a-2和21b-2沿第二方向Y排列设置。可选的,电芯组件20包括多个电芯21,多个电芯21形成沿第一方向X堆叠设置为第一列21a,此电芯组件20仅包括一列电芯。可选的,第一列21a还可以包括电芯21a-3、电芯21a-4、电芯21a-5、电芯21a-6、电芯21a-7。可选的,第二列21b还可以包括电芯21b-3、电芯21b-4、电芯21b-5、电芯21b-6、电芯21b-7。
请参阅图4和图7,可选的,第三壁113具有第一区域113a,第一区域113a设有第一壳体绝缘件1130,第一散热件50具有沿第二方向Y相对设置的第一侧壁50b和第二侧壁50c,第三壁113连接第一侧壁50b,第一壳体绝缘件1130位于第一区域113a和第一侧壁50b之间,第一壳体绝缘件1130设于第一区域113a和第一侧壁50b之间的间隙,可在第一壳体11倒置注入第一绝缘件60时,减少第一绝缘件60在第一区域113a和第一侧壁50b之间的间隙内流动。可选的,第一壳体绝缘件1130具有导热性,可将第一散热件50上的热量传递至第三壁113。可选的,第一壳体绝缘件1130包括胶水。可选的,胶水包括导 热胶。可选的,导热胶的导热系数范围为A,其中2.5w/mk<A≤5.0w/mk。可选的,第一壳体绝缘件1130还可以防止外界的杂质,灰尘进入电芯组件20。
可选的,第四壁114具有第二区域114a,第二区域114a设有第二壳体绝缘件1140,第四壁114连接第二侧壁50c,第二壳体绝缘件1140位于第二区域114a和第二侧壁50c之间,以连接第一散热件50和第四壁114,第二壳体绝缘件1140设于第二区域114a和第二侧壁50c之间的间隙,可在第一壳体11倒置注入第一绝缘件60时,减少第一绝缘件60在第二区域114a和第二侧壁50c之间的间隙内流动。可选的。第二壳体绝缘件1140具有导热性,可将第一散热件50上的热量传递至第四壁114。可选的,第二壳体绝缘件1140包括胶水。可选的,胶水包括导热胶。可选的,导热胶的导热系数范围为A,其中2.5w/mk<A≤5.0w/mk。可选的,第二壳体绝缘件1140还可以防止外界的杂质,灰尘进入电芯组件20。
进一步的,第三壁113设有第一连接孔113b,第一侧壁50b设有第二连接孔501,通过第一紧固件113c穿过第一连接孔113b和第二连接孔501,将第一散热件50固定于第三壁113上。
在一实施例中,第一通孔10a和第二通孔10b各有多个且数量相同,沿第一方向X,第一通孔10a的投影与第二通孔10b的投影有重叠。电池组100包括第二紧固件1112。可选的,多个第一通孔10a间隔设置,相邻的第一通孔10a之间设有第三连接孔1111,第一散热件50设有第四连接孔502,沿第一方向X,第三连接孔1111的投影与第四连接孔502的投影有重叠。第二紧固件1112设于第三连接孔1111和第四连接孔502,用于连接第一散热件50和第一壁111。可选的,相邻的第一通孔10a之间设有第一子通孔101,沿第一方向X,第一子通孔101的投影与第一通道50a的投影有重叠,可增加第一通道50a的进风量或出风量,提升散热。可选的,沿第三方向Z,第一子通孔101的投影与第三连接孔1111的投影有重叠。第一子通孔101和第三连接孔1111设于相邻的第一通孔10a之间,可利用第一壁111的面积,提升散热效率。
电池组100包括第三紧固件1113。可选的,多个第二通孔10b间隔设置,相邻的第二通孔10b之间设有第五连接孔1114,第一散热件50连接第二壁112的一侧设有第四连接孔502,沿第一方向X,第五连接孔1114的投影与第四连接孔502的投影有重叠。第三紧固件1113设于第五连接孔1114和第四连接孔502,用于连接第一散热件50和第二壁112。可选的,相邻的第二通孔10b之间设有第二子通孔101b,沿第一方向X,第二子通孔101b的投影与第一通道50a的投影有重叠,可增加第一通道50a的进风量或出风量,提升散热。可选的,沿第三方向Z,第二子通孔101b的投影与第五连接孔1114的投影有重叠。第二子通孔101b和第五连接孔1114设于相邻的第二通孔10b之间,可利用第二壁112的面积,提升散热效率。
请参阅图4、图8和图9,在一实施例中,电池组100还包括第二电路板13。第二壳体12具有第二壳体凹部12a,第二电路板13设于第二壳体凹部12a内,并与第二壳体12绝缘设置。第二电路板13设有第一连接部131和第二连接部132,第一连接部131和第二连接部132电连接第一电路板30。可选的,第二电路板13可为具有电池管理系统的电路板,用以智能化管理及维护各个电池单元,减少电池出现过充电和过放电,延长电池的使用寿命,监控电池的状态。
在一实施例中,参阅图9,第二壳体12具有第二壳体凹部12a,第二电路板13设于第二壳体凹部12a内。可选的,第二壳体凹部12a包括底部12a-1和侧部12a-2,侧部12a-2连接底部12a-1的边缘。底部12a-1设有多个连接柱121,第二电路板13连接于多个连接柱121背离底部12a-1的一端,第二电路板13与底部12a-1之间具有第一间隙13a。可选的,第二电路板13与底部12a-1之间设有第二绝缘件122,可使得第二电路板13以及使第二电路板13与第二壳体12之间绝缘。第二绝缘件122包括泡棉。可选的,第一间隙13a设有第三绝缘件123,第三绝缘件123覆盖第二电路板13。可选的,第二电路板13包沿第三方向Z设置的第一表面13b和第二表面13c。沿第三方向Z,第三绝缘件 123可设于第一表面13b和底部12a-1之间,可对第二电路板13和第二壳体12进行绝缘,并减少杂质进入第二电路板13和第二壳体12之间。可选的,沿第三方向Z,第三绝缘件123覆盖第二表面13c,可进一步对第二电路板13和第二壳体12进行绝缘,并进一步减少杂质进入第二电路板13和第二壳体12之间。可选的,第三绝缘件123设于第二电路板13和第二壳体凹部12a之间的间隙,进一步加强对第二电路板13和第二壳体12进行绝缘,减小第二电路板13与第二壳体12之间短路的风险,并进一步加强减少杂质进入第二电路板13和第二壳体12之间。
可选的,沿第三方向Z观察,第一连接部131和第二连接部132凸出第三绝缘件123的表面,便于组装时电连接第一电路板30。可选的,第三绝缘件123包括灌封胶、发泡胶和粘接剂中的一种。可选的,第三绝缘件123包括树脂,将树脂加热融化后,通过灌注的方式将可流动的第三绝缘件123设于第二壳体凹部12a后固化形成。可选的,第三绝缘件123包括灌封胶,灌封胶固化后的硬度为40~50A,可以为41A、42A、43A、44A、45A、46A、47A、48A、49A、50A中的任意一个。灌封胶的使用温度范围为40~200℃,可以为40℃、50℃、60℃、70℃、80℃、90℃、100℃、110℃、120℃、130℃、140℃、150℃、160℃、170℃、180℃、190℃、200℃中的任意一个。
在一实施例中,电池组100还包括连接支架14,第一壳体11和第二壳体12连接于连接支架14。连接支架14设于第二电路板13和第一散热件50之间,可减小第二电路板13与第一散热件50之间短路的风险。可选的,连接支架14为绝缘材料制成。
在一实施例中,连接支架14和第一散热件50之间形成有第二空间10c,连接支架14设有支架通孔141,支架通孔141连通第二空间10c,有利于对第二电路板13进行散热。
在一实施例中,第一壳体11和第二壳体12包括导热材料,可提升散热性能。可选的,第一壳体11和第二壳体12包括金属导热材料和导热的绝缘材料, 绝缘材料可覆盖在金属导热材料外表面。可选的,第一壳体11和第二壳体12的金属导热材料包括铝。可选的,第二壳体12的外壁设有翅片124,翅片124沿第二方向Y排列并连接第二壳体12,进一步提升散热性能。
在一实施例中,电芯21接触连接第一壳体11,将电芯21的热量通过第一壳体11散到外部环境。
在一实施例中,电极端子212具有延伸出电芯壳体211外的焊接部212a,焊接部212a为电极端子212弯折后形成。相邻的电芯21的电极端子212相向弯折并与第一电路板30连接。在一实施例中,电极端子212包括第一端子212b和第二端子212c,第一端子212b和第二端子212c极性相反,第一端子212b和第二端子212c中的一个为正极端子,另一个为负极端子。沿第三方向Z,电芯21的第一端子212b的焊接部212a的投影与相邻电芯21的第二端子212c的焊接部212a的投影至少部分重叠。相邻电芯的第一端子212b和第二端子212c相向弯折,且第一端子212b的焊接部212a和第二端子212c的焊接部212a相互堆叠连接设置。通过将相邻电芯21的焊接部212a相互连接设置,将焊接部212a连接第一电路板30,减少加工工艺步骤。
在其他实施例中,沿第三方向Z,电芯21的第一端子212b的投影还可以与相邻电芯21的第一端子212b的投影至少部分重叠,并通过第一电路板30连接,实现电芯21之间的并联连接。
请参阅图4、图13、图14、图15和图16,在一实施例中,电芯组件20还包括多个第二散热件22,第二散热件22设于相邻的电芯21之间。可选的,第二散热件22接触连接电芯21,对电芯21进行散热。可选的,第二散热件22接触连接第一壳体11,将电芯21的热量传递至第一壳体11,通过第一壳体11对电芯21进行散热。
在一实施例中,第二散热件22包括第一部件221,第一部件221设于沿第一方向X相邻的电芯21之间,可对相邻的电芯21进行散热。沿第一方向X,第一部件221的投影与电芯壳体211的投影至少部分重叠。可选的,沿第一方 向X,第一部件221的投影位于电芯壳体211的投影内。
在一实施例中,第一部件221覆盖电芯21a-1,第一部件221设有第一凹部221a,沿第一方向X,第一凹部221a的投影与电芯21a-1的电芯壳体211的投影有重叠。第一凹部221a与一个第二密封部2116位于同一个侧,可选的,沿第一方向X,第一凹部221a的投影与电芯21a-1的第二密封部2116投影有重叠。可选的,电芯21a-1的第二密封部2116朝向远离第一凹部221a的方向弯折设置。沿第三方向Z,第二密封部2116的投影和第一凹部221a的投影相离。可选的,第一凹部221a接触连接于电芯21a-1的电芯壳体211,可提升对电芯21a-1的散热。可选的,可通过第一凹部221a,便于将流动的树脂或灌封胶从电芯21的底部沿第三方向Z注入电池组100内形成第一绝缘件60,减少流动的树脂或灌封胶在注入过程中与第一部件221粘接。
在一实施例中,第一部件221设有第一凹部221a,沿第一方向X,第一凹部221a的投影与电芯21a-2的电芯壳体211的投影有重叠。第一凹部221a与一个第二密封部2116位于同一个侧,可选的,沿第一方向X,第一凹部221a的投影与电芯21a-2的第二密封部2116投影有重叠。可选的,电芯21a-2的第二密封部2116朝向远离第一凹部221a的方向弯折设置。沿第三方向Z,第二密封部2116的投影和第一凹部221a的投影相离。可选的,第一凹部221a接触连接于电芯21a-2的电芯壳体211,可提升对电芯21a-2的散热。可选的,可通过第一凹部221a,便于将流动的树脂或灌封胶从电芯21的底部沿第三方向Z注入电池组100内形成第一绝缘件60,减少流动的树脂或灌封胶在注入过程中与第一部件221粘接。可选的,靠近电芯21a-1的第一凹部221a和靠近电芯21a-2的第一凹部221a朝向相反的方向设置,流动的树脂或灌封胶从两个第一凹部221a之间沿注入电池组100内,有利于提升注入的效率,进一步减少流动的树脂或灌封胶在注入过程中与第一部件221粘接。
在一实施例中,第二散热件22包括两个第一部件221,其中一个第一部件221位于第一列电芯21a相邻电芯之间,另外一个第一部件221位于第二列电 芯2b相邻电芯之间。第一部件221设有第一凹部221a,第一凹部221a连接两个第一部件221。第一部件221覆盖电芯21a-1和电芯21b-1。沿第一方向X,第一凹部221a的投影与的电芯21a-1的电芯壳体211和电芯21b-1的电芯壳体211的投影均有重叠。可选的,沿第二方向Y,第一凹部221a位于电芯21a-1的电芯壳体211和电芯21b-1的的电芯壳体211之间。沿第一方向X,第一凹部221a的投影与电芯21a-1的电芯壳体211的投影有重叠,第一凹部221a与电芯21a-1的一个第二密封部2116位于同一个侧,可选的,沿第一方向X,第一凹部221a的投影与电芯21a-1的第二密封部2116投影有重叠。可选的,电芯21a-1的第二密封部2116朝向远离第一凹部221a的方向弯折设置。沿第三方向Z,电芯21a-1的第二密封部2116的投影和第一凹部221a的投影相离。可选的,第一凹部221a接触连接于电芯21a-1的电芯壳体211,可提升对电芯21a-1的散热。沿第一方向X,第一凹部221a的投影与电芯21b-1的电芯壳体211的投影有重叠。第一凹部221a与电芯21b-1的一个第二密封部2116位于同一个侧,可选的,沿第一方向X,第一凹部221a的投影与电芯21b-1的第二密封部2116投影有重叠。可选的,电芯21b-1的第二密封部2116朝向远离第一凹部221a的方向弯折设置。沿第三方向Z,电芯21b-1的第二密封部2116的投影和第一凹部221a的投影相离。可选的,第一凹部221a接触连接于电芯21b-1的电芯壳体211,可提升对电芯21b-1的散热。第二散热件22利用电芯21a-1和电芯21b-1之间的空间,增加第一凹部221a的面积,形成灌注第一绝缘件60的通道,便于将流动的树脂或灌封胶从电芯21的底部注入电池组100内形成第一绝缘件60,减少流动的树脂或灌封胶在注入过程中与第一部件221粘接。
在一实施例中,第二散热件22包括两个第一部件221,其中一个第一部件221位于第一列电芯21a相邻电芯之间,另外一个第一部件221位于第二列电芯2b相邻电芯之间。第一部件221设有第一凹部221a,第一凹部221a连接两个第一部件221。第一部件221覆盖电芯21a-2和电芯21b-2。沿第一方向X, 第一凹部221a的投影与电芯21a-2的电芯壳体211和电芯21b-2的电芯壳体211的投影均有重叠。可选的,沿第二方向Y,第一凹部221a位于电芯21a-2的电芯壳体211和电芯21b-2的电芯壳体211之间。沿第一方向X,第一凹部221a的投影与电芯21a-2的电芯壳体211的投影有重叠,第一凹部221a与电芯21a-2的一个第二密封部2116位于同一个侧,可选的,沿第一方向X,第一凹部221a的投影与电芯21a-2的第二密封部2116投影有重叠。可选的,电芯21a-2的第二密封部2116朝向远离第一凹部221a的方向弯折设置。沿第三方向Z,电芯21a-2的第二密封部2116的投影和第一凹部221a的投影相离。可选的,第一凹部221a接触连接于电芯21a-2的电芯壳体211,可提升对电芯21a-2的散热。沿第一方向X,第一凹部221a的投影与电芯21b-2的电芯壳体211的投影有重叠。第一凹部221a与电芯21b-2的一个第二密封部2116位于同一个侧,可选的,沿第一方向X,第一凹部221a的投影与电芯21b-2的第二密封部2116投影有重叠。可选的,电芯21b-2的第二密封部2116朝向远离第一凹部221a的方向弯折设置。沿第三方向Z,电芯21b-2的第二密封部2116的投影和第一凹部221a的投影相离。可选的,第一凹部221a接触连接于电芯21b-2的电芯壳体211,可提升对电芯21b-2的散热。可选的,靠近电芯21a-1的第一凹部221a和靠近电芯21a-2的第一凹部221a朝向相反的方向设置。第二散热件22利用电芯21a-2和电芯21b-2之间的空间,增加第一凹部221a的面积,便于将流动的树脂或灌封胶从电芯21的底部注入电池组100内形成第一绝缘件60,减少流动的树脂或灌封胶和第一部件221的在注入过程中的粘接。
在一些实施例中,第一凹部221a沿第三方向Z延伸设置,第一凹部221a形成第二通道221b,便于将第一绝缘件60从电芯21的底部沿第三方向Z注入电池组100内。可选的,相邻的第一部件221之间设有第二结构件221c,相邻的第一部件221之间具有第二间隙2211,可增加第二通道221b沿第一方向X的宽度,可扩大第二通道221b的注入口的面积,便于外部注入设备对准第二通道221b,提升注入第一绝缘件60的效率。可选的,第二结构件221c包括弹性件, 电芯21膨胀时,第二结构件221c可被压缩,为电芯21提供膨胀空间,可选的,第二结构件221c包括泡棉。可选的,第一部分211a与第一凹部221a接触的表面呈圆弧形设置,便于第一凹部221a设于沿第二方向Y排列设置的两个电芯21之间,增加第一凹部221a沿第二方向Y的距离。可选的,沿第二方向Y观察,第二密封部2116位于第一部分211a的中间位置并弯折设置,可预留放置第一凹部221a的空间。
在一实施例中,第二散热件22还包括第二部件222,第二部件222连接第一部件221的侧边。第二部件222从相邻的电芯21之间伸出,并朝向电芯21弯折,使第二部件222连接电芯壳体211。可选的,第二部件222接触连接电芯壳体211。可选的,第二部件222与电芯壳体211通过其他结构件连接,例如导热垫或导热胶等。沿第二方向Y,第二部件222的投影与电芯21的投影至少部分重叠。通过设置第二部件222接触连接电芯壳体211,增加第二散热件22与电芯壳体211的接触面积,将热量通过电芯壳体211传导至第二部件222,再由第二部件222传导至第一壳体11,提升对电芯21的散热效果。
在一实施例中,以沿第二方向Y设置的两个电芯21作为第一组电芯21c,第一组电芯21c包括第一侧面21c-1,第二侧面21c-2和第三侧面21c-3。第一侧面21c-1和第二侧面21c-2沿第二方向Y设置,第三侧面21c-3为第一组电芯21c的底部。第一部件221的侧边设有多个第二部件222,多个第二部件222从相邻的电芯21之间伸出,并朝向电芯21弯折,使第二部件222接触连接第一侧面21c-1,第二侧面21c-2和第三侧面21c-3,使第一组电芯21c的周边均设有第二部件222,进一步提升对电芯21的散热效果。可选的,第三侧面21c-3与第二部件222之间设有第一导热垫222a,相邻的第一部件221之间设有第二导热垫,进一步提升对电芯21的散热效果。
在一实施例中,第一部件221和第二部件222一体折弯成型,以增加第二散热件22的结构强度。可选的,第二散热件22为铝壳。
请参阅图17、图18、图19、图20和图21,在一实施例中,第一电路板30 设有多组孔31,每组孔31包括沿第一方向X设置的第一孔311和第二孔312。第一孔311和第二孔312沿第二方向Y延伸设置。相邻电芯21的第一端子212b穿过第一孔311,另一电芯21的第二端子212c穿过第二孔312,第一端子212b的焊接部212a和第二端子212c的焊接部212a相互堆叠后连接第一电路板30。
可选的,第一电路板30设有多个第一导电片32,第一导电片32连接第一电路板30并设于第一孔311和第二孔312,相邻电芯21的第一端子212b穿过第一孔311,另一电芯21的第二端子212c穿过第二孔312,第一端子212b的焊接部212a和第二端子212c的焊接部212a相互堆叠后焊接于第一导电片32上。焊接包括激光焊接、超声波焊接等。在其他实施例中,焊接部212a与第一导电片32也可以通过导电胶等其他的连接方式。
可选的,每组孔31还包括第三孔313,沿第三方向Z观察,第三孔313位于第一孔311和第二孔312之间。沿第三方向Z,第三孔313的投影与第一导电片32的投影有重叠。可选的,沿第三方向Z,第三孔313的投影位于第一导电片32的投影内。通过设置第三孔313,可便于第一绝缘件从第三孔313流入电池组100内。
在一实施例中,第一电路板30还设有第二导电片33。第二导电片33连接沿第二方向Y排列设置的两个电芯21的电极端子212,用于将电流从第一列21a传递至第二列21b,实现第一列21a和第二列21b之间的串联连接或并联连接。可选的,沿第三方向Z,第二导电片33的厚度大于第一导电片32的厚度。通过增加第二导电片33的厚度,可增大电流的传输。
在一实施例中,第一电路板30还设有多个第一连通孔34,沿第三方向Z,第一连通孔34贯穿第一电路板30。部分第一连通孔34沿第二方向Y排列设置,部分第一连通孔34沿第一方向X排列设置。第一连通孔34可供第一绝缘件60流入电池组100内,提升第一绝缘件60注入电池组100的效率。
在一实施例中,第一电路板30还设有多个第二连通孔35,多个第二连通孔35沿第一方向X排列设置,沿第二方向Y,多个第二连通孔35设于第一电 路板30的中间位置。电池组100还包括采样线束100a,采样线束100a通过多个第二连通孔35连接于第一电路板30。
在一实施例中,电池组100还包括第一电连接部100b和第二电连接部100c。可选的,第一电连接部100b和第二电连接部100c焊接于第一电路板30。可选的,第一电路板30具有第三区域30d和第四区域30e,第一电连接部100b焊接于第三区域30d,第二电连接部100c焊接于第四区域30e。可选的,第一电路板30具有多个第三连通孔36,第一电连接部100b和第二电连接部100c可通过第三连通孔36连接第一电路板30。第一电连接部100b连接第一端子212b和第二端子212c中的一个,第二电连接部100c连接另一个。第一电连接部100b和第二电连接部100c连接第二电路板13,通过第一电连接部100b和第二电连接部100c将电芯21的能量传递至外部使用设备。可选的,第一电连接部100b和第二电连接部100c包括铜排。
在一实施例中,第一电连接部100b包括第一导电部102和第一绝缘部103。第一导电部102包括第一区段102a和第二区段102b,第一区段102a连接第一电路板30。可选的,第一区段102a焊接于第三区域30d。可选的,第一区段102a设有第一连接凸部1021和第二连接凸部1022,第一连接凸部1021和第二连接凸部1022设于第三连通孔36内。第二区段102b可为软性结构。可选的,第二区段102b包括多个层叠设置的单片1023。可选的,第二区段102b的厚度为2mm,每一单片1023的厚度为0.1mm。可选的,单片1023包括软铜排单片。可选的,第二区段102b包括第三结构件1024和第四结构件1025,第三结构件1024沿与第三方向Z相反的方向延伸并沿第二方向Y弯折,第四结构件1025连接第三结构件1024远离第一区段102a的一端,并沿与第一方向X相反的方向折叠。第一绝缘部103包覆于第二区段102b的表面,第四结构件1025远离第一区段102a的一端凸出第一绝缘部103,用于连接第一连接部131。在第一壳体11和第二壳体12进行组装时,首先将第一电连接部100b与第二电路板13进行组装,具体的,先将第四结构件1025弯折至大致第三方向Z,然后将第四 结构件1025连接至第一连接部131,将第二壳体12连接第一壳体11,在第二壳体12盖设于第一壳体11的过程中,带动第四结构件1025从第三方向Z弯折至大致与第一方向X相反的方向,然后完成第一壳体11和第二壳体12的组装。可以理解的是,第一电连接部100b的在第一壳体11和第二壳体12组装完成后的状态为第一电连接部100b的初始状态,可减少第一电连接部100b的长度,进而减少能量回路的长度,且可减轻第一电连接部100b的重量。
可选的,第二电连接部100c的结构与第一电连接部100b的结构相同,区别在于弯折的方向不同,具体的,第一电连接部100b的第三结构件1024沿与大致第三方向Z相反的方向延伸并沿第二方向Y弯折,而第二电连接部100c沿与致第三方向Z相反的方向延伸并沿与第二方向Y相反的方向弯折。
在一实施例中,第一电路板30还设有多个缺口,至少一个电极端子212穿过缺口,并与第一电路板30连接。
在一实施例中,第一电路板30包括沿第一方向X设置的第一侧边301和第二侧边302,缺口30a包括第一缺口301a和第二缺口301b,第一缺口301a和第二缺口301b沿第二方向Y设于第一侧边301。电芯21a-1与电芯21b-1相邻的电极端子212穿过第一缺口301a并连接第二导电片33,电芯21b-1与电芯21a-1相邻的电极端子212穿过第二缺口301b并连接第二导电片33。可选的,第一缺口301a和第二缺口301b相互连通设置。
在一实施例中,缺口30a还包括第三缺口301c,第三缺口301c设于第二侧边302,电芯21a-7远离电芯21b-7的电极端子212穿过第三缺口301c并连接第一电连接部100b。
在一实施例中,缺口30a还包括第四缺口301d,第四缺口301d设于第二侧边302,第三缺口301c和第四缺口301d沿第二方向Y设于第二侧边302的两端。电芯21b-7远离电芯21a-7的电极端子212穿过第四缺口301d并连接第二电连接部100c。
请参阅图22、图23、图24、图25、图26、图27和图28,第一结构件40 具有绝缘性。可选的,第一结构件40由绝缘材料制成。可选的,第一结构件40由金属材料和绝缘材料制成,绝缘材料可覆盖在金属材料外表面。
在一实施例中,第一结构件40包括第一主体40a,第一主体40a覆盖第一电路板30,对第一电路板30进行绝缘。第一结构件40设有第一开口41,沿第三方向Z,第一开口41贯穿第一主体40a的表面。第一电连接部100b穿过第一开口41后延伸到第一结构件40远离第一电路板30的一侧。可选的,第一结构件40设有第一凸部42,第一凸部42设于第一开口41的边缘,通过第一凸部42对第一电连接部100b进行定位。沿第二方向Y,第一区段102a和第二区段102b弯折处的投影位于第一凸部42的投影内。通过第一凸部42对第一区段102a和第二区段102b弯折处进行绝缘,降低第一区段102a和第二区段102b弯折处发生短路的风险。可选的,沿第二方向Y,第一绝缘部103的投影与第一凸部42的投影有重叠,增加第一凸部42沿第三方向Z的长度,进一步提升对第一区段102a和第二区段102b弯折处的绝缘。
在一实施例中,第一主体40a设有第二开口43,第二电连接部100c穿过第二开口43。可选的,第一结构件40设有第二凸部44,第二凸部44设于第二开口43的边缘。通过第二凸部44对第二电连接部100c进行定位以及绝缘。
在一实施例中,第一结构件40设有多个沿第二方向Y设置的第四连通孔45,第一绝缘件60通过第四连通孔45流入第一结构件40和第一散热件50之间。通过第一绝缘件60将热量传递至第一散热件50。可选的,沿第三方向Z,第四连通孔45的投影与第一连通孔34的投影相离。可选的,沿第三方向Z观察,相邻电芯21的焊接部212a叠置的部分至少部分位于第四连通孔45内。可选的,第四连通孔45内设有第一绝缘件60,通过第一绝缘件60将热量传递至第一散热件50。
请一并参阅图25和图29,在一实施例中,第一电路板30和第一结构件40之间设有第三导热垫70,用于将第一电路板30的热量传递至第一结构件40。可选的,第一电路板30的热量包括焊接部212a的热量以及第一导电片32和第 二导电片33的热量。可选的,沿第三方向Z,第四连通孔45的投影位于第三导热垫70的投影内。通过第三导热垫70覆盖第四连通孔45,降低通过第四连通孔45与第一电路板30发生短路的风险。可选的,第四连通孔45内设有第一绝缘件60,第一电路板30的热量传递至第三导热垫70后,通过第四连通孔45内的第一绝缘件60可以更快的将热量传递至第一散热件50,可提升散热。
在一实施例中,第一结构件40相对第一电路板30的一侧设有第三凸部46,沿第三方向Z,第三凸部46的投影位于沿第二方向Y设置的相邻的第一导电片32之间,用于定位第一结构件40的位置。
在一实施例中,第一结构件40包括连接于第一主体40a边缘的第四凸起47。可选的,沿第一方向X,第四凸起47的投影与第一电路板30的投影有重叠,通过第四凸起47限制第一结构件40连接第一电路板30的位置,便于组装。可选的,沿第一方向X,第一电路板30的投影位于第四凸起47的投影内。可选的,沿第一方向X,第四凸起47的投影与电芯壳体211和电极端子212的投影有重叠,可对电极端子212进行绝缘。可选的,沿第一方向X,焊接部212a的投影位于第四凸起47的投影内,进一步加强绝缘。
在一实施例中,第一结构件40设有第三开口48,用于供采样线束100a穿过。
请参阅图31、图32、图33、图34和图35,在一实施例中,第一散热件50具有多个第一通道50a,多个第一通道50a沿第二方向Y排列设置。第一散热件50设有第四开口51。可选的,沿第二方向Y设置的最外侧的两个第一通道50a的其中之一连通第四开口51。可选的,第一散热件50设有第五开口52,第五开口52连通另一位于最外侧的第一通道50a。
请参阅图35和图36,第一结构件40连接第一散热件50时,第一凸部42设于第四开口51内,沿第三方向Z,第一凸部42的投影位于第四开口51的投影内。第一电连接部100b穿过第四开口51。可选的,第一散热件50设有第六开口53,采样线束100a穿过第六开口53。可选的,第四开口51和第六开口53 内设有第四绝缘件,用于封闭第四开口51和第六开口53,可在注入第一绝缘件60时,减少第一绝缘件60从第四开口51和第六开口53流出,且通过第一凸部42设于第五开口内,可减少第四绝缘件的流动,减少第四绝缘件从第一开口41流入第一结构件40和第一电路板30之间。可选的,第四绝缘件包括树脂,将树脂加热融化后,通过灌注的方式将可流动的第四绝缘件设于第四开口51和第六开口53后固定形成。可选的,第四绝缘件包括快干胶,快干胶固化后的硬度为30A。快干胶的拉伸强度为0.97MPa。快干胶的粘接力为0.5MPa。快干胶的击穿电压为21kV/mm。快干胶的体积电阻率为8.5x10 15Ω·cm。快干胶的使用温度范围为40~200℃,可以为40℃、50℃、60℃、70℃、80℃、90℃、100℃、110℃、120℃、130℃、140℃、150℃、160℃、170℃、180℃、190℃、200℃中的任意一个。
在一实施例中,沿第二方向Y设置的最外侧的两个第一通道50a内设有第四凸部54,第四凸部54接触连接第一凸部42,可对第一凸部42进行定位,进而对第一电连接部100b进行定位,并且可预留空间,便于注入第四绝缘件。
请参阅图5、图37和图38,在一实施例中,第一散热件50具有沿第一方向X设置的第三侧壁50d和第四侧壁50e。第四连接孔502设于第三侧壁50d和第四侧壁50e。第三侧壁50d设有第一绝缘部55,第一绝缘部55设于第三侧壁50d和第一壁111之间,可填充第三侧壁50d和第一壁111之间的间隙,减少第一绝缘件60流到第三侧壁50d和第一壁111之间。还可对第一散热件50和第一壳体11进行绝缘。可选的,第一绝缘部55包括泡棉。可选的,泡棉连接第三侧壁50d和第一壁111的表面具有胶水,可粘接于第三侧壁50d和第一壁111。可选的,泡棉被压缩设于第三侧壁50d和第一壁111之间,可加强密封第三侧壁50d和第一壁111之间的间隙。可选的,第四侧壁50e设有第二绝缘部56,第二绝缘部56设于第四侧壁50e和第二壁112之间,可填充第四侧壁50e和第二壁112之间,减少第一绝缘件60流到第四侧壁50e和第二壁112之间。还可对第一散热件50和第一壳体11进行绝缘。可选的,第二绝缘部56包括泡 棉。泡棉连接第四侧壁50e和第二壁112的表面具有胶水,可粘接于第四侧壁50e和第二壁112。可选的,泡棉被压缩设于第四侧壁50e和第二壁112之间,可加强密封第四侧壁50e和第二壁112之间的间隙。
在一实施例中,第一散热件50的外表面包括金属材料层,有利于散热,比如铝。可选的,第一散热件50的制成材料包括金属材料,第一散热件50的外表面可涂覆有绝缘层。可选的,第一散热件50的制成材料包括金属材料,第一散热件50的外表面包括金属材料层。
在一实施例中,第一散热件50包括底壁50f和顶壁50g,第三侧壁50d连接底壁50f和顶壁50g,第四侧壁50e连接底壁50f和顶壁50g。底壁的外表面涂覆有第一绝缘层50h。第三侧壁50d包括延伸出底壁50f的第三侧壁延伸部50i,第三侧壁延伸部50i的表面涂覆有第二绝缘层501i。第四侧壁50e包括延伸出底壁50f的第四侧壁延伸部50j,第四侧壁延伸部50j的表面涂覆有第三绝缘层501j。通过第一绝缘层50h、第二绝缘层501i和第三绝缘层501j可对第一电路板30进行绝缘。
请参阅图5和图6,第一散热件50和第一结构件40之间具有第一间隔104,第一电路板30和第一结构件40之间具有第二间隔105,电芯壳体211与第一壳体11之间具有第三间隔107。第一绝缘件60填充于第一间隔104、第二间隔105和第三间隔107内。沿第二方向Y,焊接部212a、第一电路板30、第三导热垫70和第一结构件40的投影位于第一绝缘件60的投影内。电极端子212和第一电路板30的热量通过第一绝缘件60传递至第一散热件50,通过第一通道50a对电极端子212和第一电路板30的热量进行散热。进一步的,第一间隔104位于第四凸起47和第三侧壁延伸部50i之间,第一绝缘件60通过第一间隔104流动到第一结构件40和第一散热件50之间。可选的,第一间隔104沿第一方向X的宽度为0.5mm-3mm。进一步的,第一间隔104沿第一方向X的宽度为1.5mm-2.8mm,可以为1.5mm、1.6mm、1.7mm、1.8mm、1.9mm、2.0mm、2.1mm、2.2mm、2.3mm、2.4mm、2.5mm、2.6mm、2.7mm、2.8mm中的任意一个。
可选的,第四凸起47和第四侧壁延伸部50j之间具有第四间隔109,第一绝缘件60通过第四间隔109流动到第一结构件40和第一散热件50之间。可选的,第四间隔109沿第一方向X的宽度为0.5mm-3mm。进一步的,第一间隔104沿第一方向X的宽度为1.5mm-2.8mm,可以为1.5mm、1.6mm、1.7mm、1.8mm、1.9mm、2.0mm、2.1mm、2.2mm、2.3mm、2.4mm、2.5mm、2.6mm、2.7mm、2.8mm中的任意一个。
可选的,第二间隔105位于第一电路板30和第一结构件40之间,第一绝缘件60通过第一电路板30的第一连通孔34流动至第二间隔105。
可选的,第三间隔107位于第一电路板30和电芯壳体211之间,第一绝缘件60通过第一凹部221a流动第三间隔107。
可以理解的是,在电池组100内注入第一绝缘件60时,第一绝缘件60通过第一凹部221a流动第三间隔107、第一间隔104以及第四间隔109,其中第一间隔104以及第四间隔109内的第一绝缘件60流动至第一结构件40和第一散热件50之间,第三间隔107内第一绝缘件60的通过第一连通孔34流动至第二间隔105,然后通过第四连通孔45流动至第一结构件40和第一散热件50之间。
可选的,第一散热件50与第二电路板13之间具有第四空间111a。第二电路板13产生的热量聚集于第四空间111a。在第一通道50a进行散热时,第一散热件50靠近第二电路板13的表面温度较低,将第二电路板13产生的热量传递至第一散热件50的表面,可对第二电路板13进行散热。
本申请通过第二散热件22将电芯壳体211的热量传递至第一壳体11,进行散热,通过第一绝缘件60和第一散热件50对电极端子212和第一电路板30的热量进行散热,通过第一散热件50对第二电路板13进行散热,提升对电池组100的散热。
请参阅图6、图39、图40、图41和图42,在一实施例中,第一散热件50连接第一结构件40的一侧的边缘设有第五凸部57。沿第一方向X,焊接部212a、 第一电路板30、第三导热垫70和第一结构件40的投影位于第五凸部57的投影内。通过第五凸部57与第一散热件50的底壁50f形成第五空间,焊接部212a、第一电路板30、第三导热垫70和第一结构件40设于第五空间。第一绝缘件60设于第五空间内。可选的,第五凸部57的内表面涂覆有第四绝缘层50k,可对第一电路板30以及电极端子212进行绝缘。
请参阅图43,本申请还提供一种采用上述电池组100的用电设备200。在一实施方式中,本申请的用电设备200可以是,但不限于无人机、备用电源、电动汽车、电动摩托车、电动助力自行车、电动工具、家庭用大型蓄电池等。
请参阅图44和图45,本申请还提供一种电池组100的制造方法,包括以下步骤:
步骤1:将电芯21、第一电路板30、和第一散热件50安装于第一壳体11,并将第一散热件50连接第一壳体11;
步骤2:将第四绝缘件注入第一散热件50上的开口,封闭第一散热件50;
步骤3:第四绝缘件固化后,将第一壳体11倒置,注入流动的绝缘材料,绝缘材料固化后形成第一绝缘件60;
步骤4:第一绝缘件固化后,将第一电连接部100b和第二电连接部100c连接第二电路板13,将第二壳体12安装于第一壳体11。
请参阅图4、图8和图42,在一实施例中,步骤1中第一散热件50连接第一壳体11的步骤,包括将第三壁113的第一区域113a涂覆第一壳体绝缘件1130,并连接第一侧壁50b,第一壳体绝缘件1130位于第一区域113a和第一侧壁50b之间,将第三壁113连接第一侧壁50b,减小将第三壁113连接第一侧壁50b之间的间隙。步骤1包括将第四壁114的第二区域114a涂覆第二壳体绝缘件1140,并连接第二侧壁50c,第二壳体绝缘件1140位于第二区域114a和第二侧壁50c之间,将第四壁114连接第二侧壁50c,减小将第四壁114连接第二侧壁50c之间的间隙。
进一步的,第三壁113连接第一侧壁50b的步骤包括将第一紧固件113c穿 过第一连接孔113b和第二连接孔501。步骤1包括将第二紧固件1112穿过第三连接孔1111和第四连接孔502,将第一壁111连接第三侧壁50d。步骤1包括将第三紧固件1113穿过第五连接孔1114和第四连接孔502,将第二壁112连接第四侧壁50e。
在一实施例中,步骤2具体包括:将第一电连接部100b穿过第四开口51,第二电连接部100c穿过第五开口52以及采样线束100a穿过第六开口53,然后第四开口51、第五开口52和第六开口53中注入第四绝缘件,封闭第一散热件50。
请参阅图5、图41和图42,在一实施例中,步骤3具体包括:将第一壳体11倒置,向第一壳体11内注入第一绝缘件60。进一步的通过第二通道221b向第一壳体11内注入第一绝缘件60,第一绝缘件60流动至第一散热件50并填充至第一间隔104、第二间隔105、第三间隔107和第四间隔109内,使第一绝缘件60包覆第一结构件40、第一电路板30和焊接部212a,然后安装第五壁115,将第五壁连接第一壁111、第二壁112、第三壁113和第四壁114。
请参阅图9、图10和图22,在一实施例中,步骤4具体包括:将第二电路板13安装于第二壳体12,弯折第一电连接部100b和第二电连接部100c,将第一电连接部100b连接第一连接部131,第二电连接部100c连接第二连接部132,然后将第二壳体12连接第一壳体11,完成电池组100的组装。进一步的,步骤4还包括将第三绝缘件123注入第二电路板13与第二壳体12之间,并覆盖第二电路板13。
本技术领域的普通技术人员应当认识到,以上的实施例仅是用来说明本申请,而并非用作为对本申请的限定,只要在本申请的实质精神范围内,对以上实施例所作的适当改变和变化都落在本申请公开的范围内。

Claims (27)

  1. 一种电池组,其特征在于,包括:
    壳体组件;
    电芯组件,设于所述壳体组件内,所述电芯组件包括电芯,所述电芯包括电芯壳体、设于所述电芯壳体内的电极组件以及连接至所述电极组件并且从所述电芯壳体引出的电极端子;
    第一电路板,设于所述壳体组件内并连接所述电极端子;
    第一散热件,设于所述壳体组件内;
    第一结构件,设于所述第一电路板和第一散热件之间,所述第一结构件的外表面设有绝缘材料;和
    第一绝缘件,所述第一绝缘件至少部分设于所述第一结构件和所述第一散热件之间,所述第一结构件和所述第一散热件通过所述第一绝缘件粘接。
  2. 如权利要求1所述的电池组,其特征在于,所述第一绝缘件由流动的绝缘材料注入所述电池组固化后形成。
  3. 如权利要求1所述的电池组,其特征在于,所述壳体组件、电芯组件、第一电路板、第一结构件和第一散热件通过所述第一绝缘件粘接连接。
  4. 如权利要求1所述的电池组,其特征在于,所述第一绝缘件覆盖所述电极端子位于所述电芯壳体外的部分。
  5. 如权利要求1所述的电池组,其特征在于,所述电芯壳体包括第一部分和第二部分,所述第一部分容纳所述电极组件,所述第二部分连接所述第一部分,所述电极端子从所述第二部分伸出,所述第一绝缘件覆盖所述第二部分的至少部分。
  6. 如权利要求1所述的电池组,其特征在于,所述壳体组件设有第一通孔和第二通孔,所述第一散热件设有第一通道,所述第一通道连通所述第一通孔和第二通孔。
  7. 如权利要求1所述的电池组,其特征在于,所述第一散热件设有第一绝缘部, 所述第一绝缘部设于所述壳体组件的内表面和所述第一散热件之间。
  8. 如权利要求6所述的电池组,其特征在于,所述壳体组件包括第一壳体,所述第一壳体形成有第一空间,所述第一散热件设于所述第一空间内;
    所述第一壳体包括第一壁、第二壁、第三壁和第四壁,所述第一壁和第二壁沿第一方向相对设置,所述第三壁和第四壁沿第二方向相对设置,所述第一散热件连接所述第一壁、第二壁、第三壁和第四壁的内表面。
  9. 如权利要求8所述的电池组,其特征在于,所述第一通孔设于所述第一壁,所述第二通孔设于所述第二壁。
  10. 如权利要求9所述的电池组,其特征在于,所述电芯组件包括多个电芯,所述多个电芯沿所述第一方向堆叠设置。
  11. 如权利要求9所述的电池组,其特征在于,所述第三壁设有第一区域,所述第一区域设有第一壳体绝缘件,所述第三壁和所述第一散热件通过所述第一壳体绝缘件粘接连接;
    所述第四壁设有第二区域,所述第二区域设有第二壳体绝缘件,所述第四壁和所述第一散热件通过所述第二壳体绝缘件粘接连接。
  12. 如权利要求9所述的电池组,其特征在于,所述电池组还包括可被压缩的第一绝缘部和第二绝缘部,沿所述第一方向,所述第一绝缘部设于所述第一壁和第一散热件之间,所述第一绝缘部处于被压缩状态,所述第二绝缘部设于所述第二壁和第一散热件之间,所述第一绝缘部处于被压缩状态。
  13. 如权利要求12所述的电池组,其特征在于,所述第一绝缘部包括泡棉,所述泡棉连接所述第一散热件和第一壁的表面具有胶水,可粘接于所述第一散热件和第一壁。
  14. 如权利要求12所述的电池组,其特征在于,所述第二绝缘部包括泡棉,所述泡棉连接所述第一散热件和第二壁的表面具有胶水,可粘接于所述第一散热件和第二壁。
  15. 如权利要求8所述的电池组,其特征在于,所述电池组还包括连接支架, 所述壳体组件还包括第二壳体,所述第二壳体内设有第二电路板,所述第一壳体和第二壳体连接于所述连接支架,所述连接支架设于所述第二电路板和第一散热件之间。
  16. 如权利要求15所述的电池组,其特征在于,所述连接支架设有支架通孔,所述连接支架和所述第一散热件之间形成有第二空间,所述支架通孔连通所述第二空间。
  17. 一种电池组,其特征在于,包括:
    壳体组件;
    电芯组件,设于所述壳体组件内,所述电芯组件包括多个电芯,所述电芯包括电芯壳体、设于所述电芯壳体内的电极组件以及连接至所述电极组件并且从所述电芯壳体引出的电极端子,所述电极端子包括焊接部,相邻所述电芯的焊接部叠置设置;
    第一电路板,设于所述壳体组件内并连接所述焊接部;
    第一散热件,连接所述壳体组件的内表面,所述第一电路板和所述第一散热件沿第三方向设置;
    第一结构件,设于所述第一电路板和第一散热件之间,所述第一结构件的外表面设有绝缘材料,所述第一结构件设有第四连通孔;
    沿所述第三方向,相邻所述电芯的焊接部叠置的部分的投影和所述第四连通孔的投影有重叠;
    第一绝缘件,至少部分位于所述第一结构件和第一散热件之间,以及所述第四连通孔内。
  18. 如权利要求17所述的电池组,其特征在于:可流动的绝缘材料通过所述第四连通孔流入所述第一结构件和第一散热件之间形成所述第一绝缘件。
  19. 如权利要求17所述的电池组,其特征在于:所述第一电路板还设有多个第一连通孔,沿所述第三方向,所述第一连通孔贯穿所述第一电路板,所述第一连通孔可供所述第一绝缘件流入所述电池组内。
  20. 如权利要求17-19任意一项所述的电池组,其特征在于:所述电极端子包括极性相反的第一端子和第二端子,所述第一端子和第二端子中的一个为正极端子,另一个为负极端子;
    所述第一电路板设有多组孔,每组所述孔包括沿第一方向设置的第一孔和第二孔,所述第一孔和第二孔沿第二方向延伸设置,相邻所述电芯的第一端子穿过所述第一孔,另一所述电芯的第二端子穿过所述第二孔,所述第一端子的焊接部和所述第二端子的焊接部相互堆叠后连接所述第一电路板,所述第一方向同时垂直于所述第二方向和第三方向。
  21. 如权利要求20所述的电池组,其特征在于:所述第一电路板设有多个第一导电片,所述第一导电片连接所述第一电路板并设于所述第一孔和第二孔,相邻所述电芯的第一端子穿过所述第一孔,另一所述电芯的所述第二端子穿过所述第二孔,所述第一端子的焊接部和所述第二端子的焊接部相互堆叠后焊接于所述第一导电片。
  22. 如权利要求21所述的电池组,其特征在于:每组所述孔还包括第三孔,沿所述第三方向观察,所述第三孔位于所述第一孔和所述第二孔之间,沿所述第三方向,所述第三孔的投影位于所述第一导电片的投影内。
  23. 如权利要求20所述的电池组,其特征在于:所述壳体组件设有第一通孔,和第二通孔,所述第一散热件设有第一通道,所述第一通道连通所述第一通孔和第二通孔。
  24. 如权利要求19所述的电池组,其特征在于:沿所述第三方向,所述第四连通孔的投影与所述第一连通孔的投影相离。
  25. 一种用电设备,其特征在于,包括如权利要求1-16任意一项或17-24任意一项所述的电池组。
  26. 一种如权利要求1-16任意一项或17-24任意一项所述的电池组的制造方法,其特征在于,包括以下步骤:
    将电芯、第一电路板和第一散热件安装于第一壳体,并将第一散热件连接 第一壳体;
    将第四绝缘件注入第一散热件上的开口,封闭第一散热件;
    第四绝缘件固化后,将第一壳体倒置,注入第一绝缘件;
    第一绝缘件固化后,将第一电连接部连接第二电路板,将第二壳体安装于第一壳体。
  27. 如权利要求26所述的电池组的制造方法,其特征在于,所述将第二壳体安装于第一壳体的步骤还包括将第三绝缘件注入第二电路板与第二壳体之间,并覆盖第二电路板。
PCT/CN2022/136212 2021-12-02 2022-12-02 电池组、电池组的制造方法及用电设备 Ceased WO2023098878A1 (zh)

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