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 PDFInfo
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- 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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- hole
- battery pack
- circuit board
- wall
- cell
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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]
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- H01M50/20—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
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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
- H01M50/20—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
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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
- H01M50/20—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
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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
- H01M50/20—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]
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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
- H01M50/20—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
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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
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
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- 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
Description
Claims (27)
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22900682.0A EP4439802A4 (en) | 2021-12-02 | 2022-12-02 | Battery pack, method for manufacturing battery pack, and electric apparatus |
| AU2022400919A AU2022400919B2 (en) | 2021-12-02 | 2022-12-02 | Battery pack, method for manufacturing battery pack, and electric apparatus |
| US18/679,961 US20240405317A1 (en) | 2021-12-02 | 2024-05-31 | Battery pack, battery pack manufacturing method, and electric device |
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| CN202111460132.9 | 2021-12-02 | ||
| CN202111460132 | 2021-12-02 |
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| US18/679,961 Continuation US20240405317A1 (en) | 2021-12-02 | 2024-05-31 | Battery pack, battery pack manufacturing method, and electric device |
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| WO2023098878A1 true WO2023098878A1 (zh) | 2023-06-08 |
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| PCT/CN2022/136212 Ceased WO2023098878A1 (zh) | 2021-12-02 | 2022-12-02 | 电池组、电池组的制造方法及用电设备 |
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| Country | Link |
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| US (1) | US20240405317A1 (zh) |
| EP (1) | EP4439802A4 (zh) |
| CN (1) | CN219017863U (zh) |
| AU (1) | AU2022400919B2 (zh) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024255898A1 (zh) * | 2023-06-16 | 2024-12-19 | 厦门新能达科技有限公司 | 电池模组及其制造方法、电池组和用电设备 |
| WO2025066593A1 (zh) * | 2023-09-28 | 2025-04-03 | 比亚迪股份有限公司 | 壳体组件、储能装置和储能系统 |
| EP4550560A1 (en) * | 2023-10-27 | 2025-05-07 | Xiamen Ampack Technology Limited | Battery module and manufacturing method thereof, battery pack, and electric device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN121748699A (zh) * | 2023-06-16 | 2026-03-27 | 厦门新能达科技有限公司 | 电池模组、电池组和用电设备 |
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-
2022
- 2022-12-02 EP EP22900682.0A patent/EP4439802A4/en active Pending
- 2022-12-02 CN CN202223226458.8U patent/CN219017863U/zh active Active
- 2022-12-02 AU AU2022400919A patent/AU2022400919B2/en active Active
- 2022-12-02 WO PCT/CN2022/136212 patent/WO2023098878A1/zh not_active Ceased
-
2024
- 2024-05-31 US US18/679,961 patent/US20240405317A1/en active Pending
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024255898A1 (zh) * | 2023-06-16 | 2024-12-19 | 厦门新能达科技有限公司 | 电池模组及其制造方法、电池组和用电设备 |
| WO2025066593A1 (zh) * | 2023-09-28 | 2025-04-03 | 比亚迪股份有限公司 | 壳体组件、储能装置和储能系统 |
| EP4550560A1 (en) * | 2023-10-27 | 2025-05-07 | Xiamen Ampack Technology Limited | Battery module and manufacturing method thereof, battery pack, and electric device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4439802A4 (en) | 2025-05-28 |
| AU2022400919A1 (en) | 2024-07-18 |
| AU2022400919B2 (en) | 2026-02-12 |
| EP4439802A1 (en) | 2024-10-02 |
| US20240405317A1 (en) | 2024-12-05 |
| CN219017863U (zh) | 2023-05-12 |
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