WO2023240633A1 - 电池单体、电池以及用电装置 - Google Patents

电池单体、电池以及用电装置 Download PDF

Info

Publication number
WO2023240633A1
WO2023240633A1 PCT/CN2022/099581 CN2022099581W WO2023240633A1 WO 2023240633 A1 WO2023240633 A1 WO 2023240633A1 CN 2022099581 W CN2022099581 W CN 2022099581W WO 2023240633 A1 WO2023240633 A1 WO 2023240633A1
Authority
WO
WIPO (PCT)
Prior art keywords
tab
main body
battery cell
cell according
isolation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/099581
Other languages
English (en)
French (fr)
Inventor
雷育永
郭志君
王鹏
杨瑞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Priority to EP22946314.6A priority Critical patent/EP4421975A4/en
Priority to PCT/CN2022/099581 priority patent/WO2023240633A1/zh
Priority to CN202280058613.3A priority patent/CN117941163A/zh
Publication of WO2023240633A1 publication Critical patent/WO2023240633A1/zh
Priority to US18/671,974 priority patent/US20240322404A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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 field of battery technology, and more specifically, to a battery cell, a battery and an electrical device.
  • Battery cells are widely used in electronic devices, such as mobile phones, laptops, battery cars, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, etc.
  • This application provides a battery cell, a battery and an electrical device, which can improve safety.
  • a battery cell including a casing, an electrode assembly and an isolation member.
  • the shell is provided with electrode lead-out parts.
  • the electrode assembly is accommodated in the casing.
  • the electrode assembly includes a main body and tabs led out from the end surface of the main body.
  • At least part of the isolation member is disposed between the electrode lead-out piece and the end surface of the main body.
  • the isolation member is provided with a channel, and the tab passes through the channel and is electrically connected to the electrode lead-out piece.
  • the multiple tab layers are in an unclamped state in the channel, which can restrain the multiple tab layers to a certain extent and reduce the polarity.
  • the deformation of the ear layer can also reduce the friction between the ear layer and the wall of the channel, reducing the risk of friction and wear of the ear layer.
  • W 1 and T 1 satisfy: 1 mm ⁇ W 1 -T 1 ⁇ 3 mm.
  • the axial direction of the channel is perpendicular to the end surface of the main body part, so as to reduce the difficulty of the tab passing through the channel and reduce the maximum angle at which the tab layer is bent.
  • the tab includes a first tab portion, a second tab portion, and a third tab portion.
  • the first tab portion is connected to the main body portion, and at least part of the first tab portion is located between the isolation member and the main body portion.
  • the second tab part is connected to an end of the first tab part away from the main body part, and the second tab part is accommodated in the channel.
  • the third tab part is connected to an end of the second tab part away from the first tab part, and is used to connect the electrode lead-out piece.
  • At least part of the isolation member is located between the third pole lug and the main body part to insulate and isolate the third pole lug part from the end surface of the main body part, thereby reducing the risk of the third pole lug being inserted into the main body part and improving safety.
  • the third pole portion includes a first section, a second section and a first bent section.
  • the first section is connected to the second tab portion, and at least part of the isolation member is located between the first section and the main body portion.
  • the second section is located on the side of the first section away from the main body and is connected to the electrode lead-out piece.
  • the first bending section is used to connect the first section and the second section.
  • the second section is parallel to the end surface of the main body part to reduce the space occupied by the third tab part in the direction perpendicular to the end surface and improve the energy density of the battery cell.
  • the third lug portion is provided with a first welding zone, the first welding zone is located only on the second section, and at least part of the first welding zone is connected to the electrode lead-out member.
  • the first welding zone is only located on the second section, so that the first welding zone avoids the bending position of the third pole lug, thereby reducing the risk of cracking in the first welding zone.
  • the battery cell further includes an adapter.
  • the adapter includes a tab connection part, an electrode connection part and a second bending section.
  • the tab connection part is connected to the third tab part.
  • the electrode connection part is located on a side of the tab connection part away from the main body part and is connected to the electrode lead-out piece.
  • the second bending section is used to connect the tab connection part and the electrode connection part.
  • the tab connection part, the electrode connection part and the third tab part are all parallel to the end surface of the main body part, so as to reduce the space occupied by the adapter and the third tab part in the direction perpendicular to the end surface. , improve the energy density of battery cells.
  • the second bend section is provided with a weak structure.
  • the adapter is guided to bend in a set area.
  • the adapter is provided with a second welding area and a third welding area.
  • the second welding area is only provided at the tab connection portion and is used to connect to the third tab portion.
  • the third welding area is only provided at the electrode.
  • the connecting part is used to connect with the electrode lead-out piece.
  • the second welding zone is only provided at the tab connection part, and the third welding zone is only provided at the electrode connection part, so that the second welding zone and the third welding zone avoid the adapter. bending position, thereby reducing the risk of cracking in the second and third welding zones.
  • the isolation member includes an isolation plate provided with a channel, and at least a portion of the isolation plate is located between the third tab portion and the body portion.
  • the isolation plate can insulate and isolate the end face of the third pole lug from the main body, thereby reducing the risk of the third pole lug being inserted into the main body and improving safety.
  • the isolation member further includes a connecting plate surrounding the outside of the isolation plate, and the connecting plate protrudes from a side of the isolation plate away from the main body part to jointly define a receiving recess with the isolation plate. At least part of the third pole lug is accommodated in the accommodation recess.
  • the connecting plate can improve the overall strength of the isolation member, and can also surround the third pole ear portion to insulate and isolate the third pole ear portion from at least part of the housing to improve safety.
  • the battery cell further includes an insulating member contained within the housing and connected to the housing. At least part of the connecting plate is located between the insulating member and the end surface of the main body. The insulating member and the end face can limit the connection plate from both sides to reduce the shaking of the isolation member when the battery cell is subject to external impact.
  • At least part of the connecting plate is sandwiched between the insulating member and the end surface of the body portion in a first direction perpendicular to the end surface.
  • the insulating member and the end surface of the main body clamp at least part of the connecting plate from both sides to limit the movement of the connecting plate in the first direction, thereby reducing the amplitude of the isolating member shaking in the first direction when the battery cell is subjected to external impact. , improve safety.
  • At least part of the insulating member is received in the receiving recess.
  • the portion of the insulating member accommodated in the receiving recess can limit the isolation member, thereby limiting the movement of the isolation member in a direction perpendicular to the first direction.
  • the inner surface of the connecting plate is provided with a step surface, and the portion of the insulating member accommodated in the receiving recess is pressed against the step surface.
  • the insulation member presses against the step surface to limit the movement of the isolation member in the first direction.
  • the inner surface of the connecting plate further includes a limiting surface connected to the step surface, and the limiting surface surrounds the outside of the insulating component and is in contact with the insulating component.
  • the part of the insulating member accommodated in the receiving recess is in contact with the limiting surface to limit the movement of the limiting surface.
  • the isolation member is a one-piece structure. Arranging the isolation member to be integrally formed can make the isolation member have higher overall strength and eliminate the assembly process of the isolation member.
  • the isolation plate includes a first isolation plate and a second isolation plate that are spaced apart, and a channel is formed between the first isolation plate and the second isolation plate.
  • the connecting plate includes a first connecting plate and a second connecting plate. The first connecting plate and the first isolating plate are integrally formed. The second connecting plate is integrally formed with the second isolating plate. The first connecting plate and the second connecting plate are formed independently and mutually. connect.
  • the isolation member of the above technical solution is formed in one piece, which can make the assembly method of the isolation member and the electrode assembly more flexible.
  • the first connection plate is snapped onto the second connection plate.
  • the snap connection can simplify the assembly process of the first connection plate and the second connection plate.
  • the first connecting plate includes two first clamping parts, and the two first clamping parts are respectively provided at opposite ends of the first isolation plate.
  • the second connecting plate includes two second clamping parts, and the two second clamping parts are respectively provided at opposite ends of the second isolation plate.
  • the first clamping part is clamped to the second clamping part. The cooperation of the two first clamping parts and the two second clamping parts can realize the fixation of the first connecting plate and the second connecting plate, and further enhance the stability and reliability of the connection between the first connecting plate and the second connecting plate. .
  • At least one first latching part is provided with a protrusion
  • at least one second latching part is provided with a latching hole
  • at least part of the protrusion is accommodated in the latching hole to engage the first latching part.
  • Connected to the second clamping part Through the cooperation between the protrusion and the locking hole, the first locking part and the second locking part are connected.
  • the isolation plate includes a first isolation plate and a second isolation plate that are spaced apart, and a channel is formed between the first isolation plate and the second isolation plate.
  • a portion of the first tab portion is located between the first isolation plate and the main body portion, and another portion of the first tab portion is located between the second isolation plate and the main body portion.
  • the first isolating plate and the second isolating plate can limit the position of the first tab portion, so as to reduce the shaking and deformation of the first tab portion when the battery cell is subjected to external impact.
  • the first isolation plate includes a first slope facing the main body portion. In the first direction perpendicular to the end surface, the minimum distance between the end of the first inclined surface close to the channel and the end surface of the main body is greater than the minimum distance between the end of the first inclined surface away from the channel and the end surface of the main body. In the first direction, a part of the first lug portion is located between the first inclined surface and the end surface of the main body portion.
  • the gap between the first isolation plate and the first pole part can be reduced, thereby enabling the first isolation plate to limit and shape the first pole part, and helping to maintain the first The appearance of the pole ear.
  • the angle between the first inclined surface and the end surface is ⁇
  • the size of the first lug portion along the first direction is h 0
  • the size of the first lug portion along the second direction is W 0
  • the size of the first lug portion along the first direction is W 0 .
  • the two directions are the stacking directions of the plurality of tab layers of the first tab portion and are perpendicular to the first direction.
  • ⁇ , h 0 and W 0 satisfy: tan ⁇ 2h 0 /W 0 .
  • the above technical solution can reduce the pressure between the first inclined surface and the first tab part, and reduce the risk of cracking of the tab layer of the first tab part.
  • the first bevel is substantially parallel to the tab bevel of the first tab portion, thereby reducing the gap between the first bevel and the first tab portion, so that the first bevel can effectively shape the first tab portion.
  • the first slope offsets the first tab portion.
  • the first inclined surface presses against the first pole portion, thereby shaping the first pole portion and maintaining the shape of the first pole portion.
  • the second isolation plate includes a second slope facing the main body portion.
  • the minimum distance between the end of the second inclined surface close to the channel and the end surface of the main body is greater than the minimum distance between the end of the second inclined surface away from the channel and the end surface of the main body.
  • another part of the first lug part is located between the second inclined surface and the end surface of the main body part.
  • the angle between the first inclined surface and the end surface is equal to the angle between the second inclined surface and the end surface, so as to reduce the difference in bending angles of the tab layers on the outermost two sides of the first tab part, Helps improve the shape of the first pole ear.
  • the minimum thickness of the first isolation plate is d1, and d1 ⁇ 0.5mm.
  • the above technical solution can make the first isolation plate have a certain strength, thereby enabling the first isolation plate to separate the third pole lug portion and the main body portion, thereby reducing the risk of deformation of the first isolation plate.
  • the above technical solution can make the second isolation plate have a certain strength, thereby enabling the second isolation plate to separate the third pole lug portion and the main body portion, thereby reducing the risk of deformation of the second isolation plate.
  • the third pole portion includes a first section, a second section and a first bent section.
  • the first section is connected to the second lug portion; the second section is located on the side of the first section away from the main body and is connected to the electrode lead-out piece.
  • the first bending section is used to connect the first section and the second section, and at least part of the first isolation plate is located between the first bending section and the main body. The first isolation plate insulates the first bending section from the main body to reduce the risk of the first bending section being inserted into the main body and improve safety.
  • the first isolation plate is provided with a third slope on an end surface side facing away from the main body.
  • a minimum distance between an end of the third inclined surface close to the channel and the electrode lead-out member is less than a minimum distance between an end of the third inclined surface away from the channel and the electrode lead-out member.
  • at least part of the first section and at least part of the second section are located between the third slope and the electrode lead-out piece.
  • the first section and the second section are generally stacked along the first direction, and the space occupied by the two in the first direction is generally 2T 1 ; the above technical solution makes H 1 > 2T 1 to provide space for the first section and the second section, Reduce the pressure between the first section and the first isolation plate, reduce the friction between the first section and the first isolation plate, and reduce the risk of wear and cracking of the first section.
  • the first isolation plate includes a first slope facing the main body portion. In the first direction, the minimum distance between the end of the first inclined surface close to the channel and the end surface of the main body is greater than the minimum distance between the end of the first inclined surface away from the channel and the end surface of the main body; in the first direction, the first A part of the lug portion is located between the first inclined surface and the end surface of the main body portion. In the first direction, the minimum thickness of the portion of the first isolation plate located between the first inclined surface and the first plane is greater than the minimum thickness of the portion of the first isolation plate located between the first inclined surface and the third inclined surface.
  • the dislocation of the tab layers can be reduced.
  • Providing the channel in the middle area of the isolation member can reduce the distance between the channel and the gathered parts of the plurality of tab layers, making it easier for the plurality of tab layers to pass through the channel.
  • FIG. 2 is an exploded schematic diagram of a battery provided by some embodiments of the present application.
  • Figure 6 is an enlarged schematic diagram of Figure 4 at box A;
  • Figure 7 is a schematic cross-sectional view of the tab of the electrode assembly of the battery cell provided by some embodiments of the present application.
  • Figure 8 is a schematic cross-sectional view of an isolation member of a battery cell provided by some embodiments of the present application.
  • Figure 9 is an enlarged schematic diagram of Figure 6 at box B;
  • Figure 10 is an enlarged schematic diagram of Figure 6 at box C;
  • Figure 11 is a schematic three-dimensional structural diagram of an isolation member of a battery cell provided by some embodiments of the present application.
  • Figure 12 is an enlarged schematic diagram of Figure 11 at circular frame D;
  • Figure 14 is a schematic three-dimensional structural diagram of an isolation member of a battery cell provided by other embodiments of the present application.
  • FIG. 17 is a schematic structural diagram of an adapter for a battery cell provided by some embodiments of the present application.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
  • connection should be understood in a broad sense.
  • connection can be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • connection can be a fixed connection
  • connection can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • connection can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • “Plural” appearing in this application means two or more (including two).
  • parallel includes not only the absolutely parallel situation, but also the roughly parallel situation that is conventionally recognized in engineering; at the same time, the term “perpendicular” includes not only the absolutely vertical situation, but also the roughly parallel situation that is conventionally recognized in engineering. vertical situation.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly includes a positive electrode piece, a negative electrode piece and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector.
  • the positive electrode current collector includes a positive electrode current collector and a positive electrode tab.
  • the positive electrode current collector is coated with the positive electrode active material layer.
  • the positive electrode tab is not coated with the positive electrode active material layer.
  • the material of the cathode current collector can be aluminum, and the cathode active material layer includes cathode active materials.
  • the cathode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the negative electrode piece includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the negative electrode current collector includes a negative electrode current collector and a negative electrode tab.
  • the negative electrode current collector is coated with the negative electrode active material layer.
  • the negative electrode tab is not coated with the negative electrode active material layer.
  • the negative electrode current collector may be made of copper, and the negative electrode active material layer may include a negative electrode active material.
  • the negative electrode active material may be carbon or silicon.
  • the material of the isolation film can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.
  • the tabs may be deformed, and the deformed tabs may be inserted into the main body, thereby causing the risk of positive and negative electrode conduction and posing a safety hazard.
  • Electrical devices can be vehicles, cell phones, portable devices, laptops, ships, spacecraft, electric toys and power tools, etc.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.
  • spacecraft include aircraft, rockets, space shuttles, spaceships, etc.
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.
  • electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • Electric drills Electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • the following embodiments take the electrical device as a vehicle as an example.
  • Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • the battery 2 can not only be used as the operating power source of the vehicle 1, but also can be used as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.
  • the battery 2 includes a case 5 and a battery cell 6 , and the battery cell 6 is accommodated in the case 5 .
  • Figure 3 is an exploded schematic view of a battery cell provided by some embodiments of the present application
  • Figure 4 is a partial cross-sectional schematic view of a battery cell provided by some embodiments of the present application
  • Figure 5 is a schematic diagram of a battery cell provided by some embodiments of the present application.
  • a schematic structural view of the electrode assembly
  • Figure 6 is an enlarged schematic view of Figure 4 at box A
  • Figure 7 is a schematic cross-sectional view of the tab of the electrode assembly of the battery cell provided by some embodiments of the present application
  • Figure 8 is a schematic cross-sectional view of some of the electrode components of the battery cell provided by the present application.
  • the embodiment provides a schematic cross-sectional view of the isolation member of a battery cell.
  • the battery cell 6 in the embodiment of the present application includes a casing 20 , an electrode assembly 10 and an isolation member 30 .
  • the housing 20 is provided with an electrode lead-out piece 21 .
  • the electrode assembly 10 is contained in the housing 20 .
  • the electrode assembly 10 includes a main body 11 and tabs 12 extending from an end surface 111 of the main body 11 .
  • At least part of the isolation member 30 is provided between the electrode lead-out 21 and the end surface 111 of the main body part 11 .
  • the isolation member 30 is provided with a channel 31 , and the pole lug 12 passes through the channel 31 and is electrically connected to the electrode lead-out member 21 .
  • the housing 20 can be made of various materials.
  • the housing 20 can be made of metal or plastic.
  • the material of the housing 20 may be copper, iron, aluminum, steel, aluminum alloy, etc.
  • the electrode lead-out member 21 may be directly connected to the tab 12 or may be indirectly connected to the tab 12 via other conductive structures.
  • the electrode assembly 10 includes a positive electrode piece and a negative electrode piece.
  • the electrode assembly 10 generates electrical energy through oxidation and reduction reactions during the insertion/extraction of ions in the positive electrode piece and the negative electrode piece.
  • the electrode assembly 10 may be a wound electrode assembly, a laminated electrode assembly, or other types of electrode assemblies.
  • the electrode assembly 10 may be formed by winding a positive electrode piece, a separation film, and a negative electrode piece.
  • the electrode assembly 10 includes a main body 11 and tabs 12 extending from an end surface 111 of the main body 11 .
  • the main body part 11 may include a portion of the positive electrode piece coated with the active material layer, a portion of the negative electrode piece coated with the active material layer, and a separation film.
  • the active material in the active material layer is used to react electrochemically with the electrolyte to produce a charge and discharge process.
  • the edge of the isolation film forms the end surface 111 of the main body part 11 .
  • the plurality of pole tabs 12 include positive pole tabs and negative pole tabs.
  • the positive pole tabs and the negative pole tabs can be led out from the same end of the main body part 11 , or they can be led out from opposite ends of the main body part 11 .
  • there may be two electrode lead-out members 21 and the two electrode lead-out members 21 are electrically connected to the positive electrode tab and the negative electrode tab respectively.
  • the isolation member 30 may be entirely located between the electrode lead-out member 21 and the main body part 11 , or may be only partially located between the electrode assembly 10 and the main body part 11 .
  • the isolation member 30 may be an integrated structure or a split structure. Illustratively, the isolation member 30 may be connected by a plurality of independently formed parts.
  • the channel 31 can be used to connect the space between the isolation member 30 and the end surface 111 to the space between the isolation member 30 and the electrode lead-out 21 so that the tab 12 can be connected to the electrode lead-out 21 .
  • the portion of the tab 12 accommodated in the channel 31 may be an interference fit, a clearance fit or a transition fit with the channel 31 .
  • the isolation member 30 can insulate and isolate at least part of the passage 31 of the tab 12 from the end surface 111 of the main body 11, so that when the battery cell 6 is impacted by an external impact, the tab 12 can be lowered and inserted into the main body. 11, reduce the risk of short circuit and improve safety.
  • housing 20 includes end cap 22 and housing 23 .
  • the housing 23 is a component used to cooperate with the end cap 22 to form an internal cavity of the battery cell 6 .
  • the formed internal cavity can be used to accommodate the electrode assembly 10 , electrolyte and other components.
  • Housing 23 and end cap 22 may be separate components.
  • an opening can be provided on the housing 23 , and the end cover 22 covers the opening at the opening to form an internal cavity of the battery cell 6 .
  • the housing 23 can be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 23 can be determined according to the specific shape and size of the electrode assembly 10 .
  • the housing 23 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • the shape of the end cap 22 can be adapted to the shape of the housing 23 to fit the housing 23 .
  • the end cap 22 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 22 is less likely to deform when subjected to extrusion and collision, so that the battery cell 6 can have higher durability. Structural strength and safety performance can also be improved.
  • the two opposite ends of the housing 23 have openings, and there are two end caps 22 .
  • the two end caps 22 cover the openings at both ends of the housing 23 respectively.
  • the electrode lead-out part 21 and the end cap 22 may be independent components, and the electrode lead-out part 21 may be installed on the end cap 22. In some alternative embodiments, the electrode lead-out member 21 and the end cap 22 may also be integrally formed.
  • the tab 12 includes a plurality of tab layers 12a, and the plurality of tab layers 12a are stacked. By arranging multiple tab layers 12a, the overcurrent capability of the tab 12 can be increased, the heat generation of the tab 12 can be reduced, and the risk of the tab 12 fusing can be reduced.
  • the tab layer 12a is a metal foil, and its surface is not coated with an active material layer.
  • the plurality of tab layers 12 a are converged toward the middle region of the end surface 111 of the main body 11 , or may be converged toward the side regions of the end surface 111 of the main body 11 .
  • the tab 12 is provided with a first welding area 12b; in the first welding area 12b, a plurality of tab layers 12a are connected.
  • the plurality of tab layers 12a may be welded by ultrasonic welding to form the first welding area 12b.
  • the plurality of tab layers 12a can be gathered and connected, thereby reducing the risk of the plurality of tab layers 12a being dislocated in the subsequent assembly process.
  • the tab 12 includes a plurality of tab layers 12 a , and the plurality of tab layers 12 a are partially stacked in the channel 31 .
  • the size of the channel 31 along its own width direction is W 1
  • the total thickness of the plurality of tab layers 12 a is T 1 .
  • W 1 and T 1 satisfy: W 1 > T 1 .
  • each tab layer 12a is T 0
  • the number of tab layers 12a of the tab 12 is n, where n is a positive integer greater than 1.
  • T 1 T 0 ⁇ n.
  • W 1 ⁇ T 1 the walls of the channel 31 will clamp multiple tab layers 12 a.
  • the portion of the tab layers 12 a located in the channel 31 will not easily The stress is released through deformation, which may cause stress concentration in the tab layer 12a and cause the risk of cracking of the tab layer 12a.
  • W 1 > T 1 is used to provide an movable space for the tab layer 12 a in the channel 31 , reduce stress concentration, and reduce the risk of cracking of the tab layer 12 a.
  • W 1 -T 1 The smaller the value of W 1 -T 1 is, the smaller the activity space of the ear layer 12a in the channel 31 is. If W 1 -T 1 is too small, when the main body 11 shakes due to an external impact on the battery cell 6 , the tab layer 12 a will easily rub against the wall of the channel 31 , causing the risk of wear of the tab layer 12 a . In view of this, the inventor made the value of W 1 -T 1 greater than or equal to 0.5mm to reduce the risk of friction and wear of the tab layer 12a and ensure the overcurrent capability of the tab 12.
  • the value of W 1 -T 1 is 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm or 4mm.
  • the tab 12 can be passed through the channel 31 first, and then the tab 12 and the electrode lead-out member 21 can be connected.
  • the tab 12 and the electrode lead-out member 21 may also be connected first, and then the isolation member 30 is installed.
  • the angle between the axial direction of the channel 31 and the end surface 111 is an acute angle, a right angle or an obtuse angle.
  • the channel 31 includes two side walls 311 oppositely arranged along its width direction, and a plurality of tab layers 12a are stacked between the two side walls 311 .
  • the axial direction of the channel 31 is perpendicular to the end surface 111 of the main body 11 . This embodiment can reduce the difficulty of the tab 12 passing through the channel 31 and reduce the maximum bending angle of the tab layer 12a.
  • the axial direction of the channel 31 is parallel to the first direction X, and the width direction of the channel 31 is parallel to the second direction Y.
  • the first direction X is perpendicular to the end surface 111 of the main body 11 .
  • the second direction Y is parallel to the end surface 111 and perpendicular to the first direction X, and the roots of the plurality of tab layers 12 a connected to the main body 11 are arranged along the second direction Y.
  • the middle area of the end surface 111 refers to an area of the end surface 111 close to the center of the end surface 111 along the second direction Y.
  • the ratio of the size of the middle area of the end surface 111 in the second direction Y to the total size of the end surface 111 in the second direction Y is 5%-20%.
  • the third tab portion 123 can be directly connected to the electrode lead 21 to electrically connect the electrode lead 21 with the tab 12 .
  • the third tab portion 123 may also be indirectly connected to the electrode lead-out member 21 through other conductive structures to electrically connect the electrode lead-out member 21 and the tab 12 .
  • the isolation member 30 is at least partially located between the third tab portion 123 and the main body portion 11 to insulate and isolate the third tab portion 123 from the end surface 111 of the main body portion 11 , thereby reducing the difficulty of inserting the third tab portion 123 into the main body portion 11 . risks and improve safety.
  • the first bending section 1233 is bent relative to the first section 1231 and is bent relative to the second section 1232 .
  • the first segment 1231 may be parallel to the second segment 1232. Alternatively, an included angle greater than 0° may also be formed between the first section 1231 and the second section 1232 .
  • the third tab portion 123 is bent into two layers to reduce the space occupied by the third tab portion 123 in the direction perpendicular to the end surface 111 and improve the energy density of the battery cell 6 .
  • the isolation member 30 can insulate and isolate the first section 1231 from the end surface 111 of the main body 11 , thereby reducing the risk of the first section 1231 being inserted into the main body 11 and improving safety.
  • the second section 1232 is parallel to the end surface 111 of the main body 11 .
  • parallel refers to being substantially parallel, and a certain error is allowed.
  • the angle between the second section 1232 and the end surface 111 is less than 10°, and the second section 1232 can be considered to be parallel to the end surface 111 of the main body 11 .
  • both the first section 1231 and the second section 1232 are parallel to the end surface 111 of the main body 11 to reduce the space occupied by the third tab 123 in the direction perpendicular to the end surface 111 and improve the performance of the battery cell 6 Energy Density.
  • the third lug portion 123 is provided with a first welding area 12b, the first welding area 12b is located only on the second section 1232, and at least part of the first welding area 12b is connected to the electrode lead-out member 21.
  • the first welding area 12b can be connected to the electrode lead-out member 21 by welding, bonding, snapping or other methods.
  • the plurality of tab layers 12a are connected at the first welding area 12b to reduce the risk of the plurality of tab layers 12a being dislocated in the subsequent assembly process.
  • the isolation member 30 includes an isolation plate 32 provided with a channel 31 , and at least part of the isolation plate 32 is located between the third tab portion 123 and the main body portion 11 .
  • the isolation plate 32 may have an integrated structure or a split structure.
  • the isolation plate 32 can insulate and isolate the third tab portion 123 from the end surface 111 of the main body 11 , thereby reducing the risk of the third tab portion 123 being inserted into the main body 11 and improving safety.
  • the isolation plate 32 includes a first isolation plate 321 and a second isolation plate 322 that are spaced apart, and a channel 31 is formed between the first isolation plate 321 and the second isolation plate 322 .
  • a portion of the first tab portion 121 is located between the first isolation plate 321 and the main body portion 11
  • another portion of the first tab portion 121 is located between the second isolation plate 322 and the main body portion 11 .
  • the first isolating plate 321 and the second isolating plate 322 can limit the position of the first lug portion 121 to reduce the shaking and deformation of the first lug portion 121 when the battery cell 6 is subjected to an external impact.
  • the first isolation plate 321 includes a first inclined surface 321a facing the main body portion 11 . In the first direction the minimum distance between them. In the first direction X, a part of the first tab portion 121 is located between the first inclined surface 321a and the end surface 111 of the main body portion 11.
  • the plurality of tab layers 12a of the first tab portion 121 will form tab slopes 121a after being gathered together.
  • the gap between the first isolation plate 321 and the first lug portion 121 can be reduced, thereby enabling the first isolation plate 321 to limit and shape the first lug portion 121, and have the effect of Helps maintain the shape of the first tab portion 121 .
  • the first inclined surface 321a is a plane, and the angle between the first inclined surface 321a and the end surface 111 is an acute angle.
  • the angle between the first inclined surface 321a and the end surface 111 is ⁇
  • the size of the first tab portion 121 along the first direction X is h 0
  • the size of the first tab portion 121 along the second direction Y is h 0
  • the size is W 0
  • the second direction Y is the stacking direction of the plurality of tab layers 12 a of the first tab portion 121 and is perpendicular to the first direction X.
  • ⁇ , h 0 and W 0 satisfy: tan ⁇ 2h 0 /W 0 .
  • tan ⁇ 2h 0 /W 0 is set to reduce the pressure between the first inclined surface 321a and the first tab part 121 and reduce the risk of cracking of the tab layer 12a of the first tab part 121.
  • ⁇ ranges from 15° to 75°.
  • ⁇ is 15°, 30°, 45°, 60° or 75°.
  • ⁇ -arctan (2h 0 /W 0 ) is less than 15°, which allows a smaller gap between the first slope 321a and the first tab 121 .
  • This embodiment can make the first inclined surface 321a substantially parallel to the lug inclined surface 121a of the first lug part 121, thereby reducing the gap between the first inclined surface 321a and the first lug part 121, so that the first inclined surface 321a can face the first lug part 121.
  • the first tab portion 121 is effectively shaped.
  • the first inclined surface 321a offsets the first tab portion 121 .
  • the first inclined surface 321 a presses against the first tab portion 121 , thereby shaping the first tab portion 121 and maintaining the shape of the first tab portion 121 .
  • the second isolation plate 322 includes a second inclined surface 322a facing the main body portion 11 . In the first direction . In the first direction
  • the angle between the second inclined surface 322a and the end surface 111 is ⁇ , tan ⁇ 2h 0 /W 0 .
  • tan ⁇ 2h 0 /W 0 .
  • the minimum thickness of the first isolation plate 321 is d1, and d1 ⁇ 0.5 mm.
  • the minimum thickness of the first isolation plate 321 is greater than or equal to 0.5 mm, so that the first isolation plate 321 has a certain strength, thereby enabling the first isolation plate 321 to separate the third pole ear portion 123 and the main body portion 11, reducing the first isolation Risk of plate 321 deformation.
  • the end of the first isolation plate 321 away from the channel 31 has a greater thickness, so as to reduce the distance between the first isolation plate 321 and the first isolation plate 321 when the first isolation plate 321 and the first tab portion 121 are pressed against each other. Risk of bending away from the end of channel 31.
  • Figure 9 is an enlarged schematic diagram of Figure 6 at block B.
  • the first isolation plate 321 is provided with a third slope 321b on the side facing away from the end surface 111 of the main body 11 . In the first direction distance. In the first direction
  • the plurality of tab layers are more fluffy, that is to say, the first bending section 1233 occupies a larger space in the first direction X.
  • the first section 1231 and the second section 1232 are generally stacked along the first direction
  • the second section 1232 provides space to reduce the pressure between the first section 1231 and the first isolation plate 321, reduce the friction between the first section 1231 and the first isolation plate 321, and reduce the risk of wear and cracking of the first section 1231. .
  • the minimum distance between the end of the third slope 321b away from the channel 31 and the electrode lead-out member 21 is H 2 , H 2 > 3T 1 .
  • the first plane 321c is parallel to the end surface 111.
  • the first isolation plate 321 includes a first inclined surface 321a facing the main body portion 11 .
  • a part of the first tab portion 121 is located between the first inclined surface 321 a and the end surface 111 of the main body portion 11 .
  • the first slope 321a can shape the first tab portion 121 to reduce the risk of deformation of the first tab portion 121.
  • the cooperation of the first inclined surface 321a and the second inclined surface 322a can utilize the space on the side of the first isolation plate 321 facing the end face 111 to the space on the side of the first isolation plate 321 facing away from the end face 111, so that the first isolation plate 321 is away from the end face 111.
  • the space on the side for the third pole lug 123 to be bent is maximized.
  • the portion of the first isolation plate 321 between the first slope 321a and the first plane 321c can have a greater thickness, thereby reducing the distance of the first isolation plate 321 around the first isolation plate 321. Risk of bending of the end of the channel 31.
  • the third inclined surface 321b is parallel to the first inclined surface 321a.
  • Figure 10 is an enlarged schematic view of Figure 6 at box C;
  • Figure 11 is a schematic three-dimensional structural view of the isolation member of a battery cell provided by some embodiments of the present application;
  • Figure 12 is an enlarged schematic view of Figure 11 at round frame D;
  • Figure 13 is a partial cross-sectional schematic diagram of the first clamping part and the second clamping part shown in FIG. 12 .
  • the isolation member 30 includes an isolation plate 32 , the isolation plate 32 is provided with a channel 31 , and at least part of the isolation plate 32 is located between the third tab portion 123 and the main body portion 11 between.
  • the isolation member 30 further includes a connecting plate 33 surrounding the outside of the isolation plate 32 , and the connecting plate 33 protrudes from a side of the isolation plate 32 away from the main body 11 to cooperate with the isolation plate 32
  • a receiving recess 34 is defined. At least part of the third tab portion 123 is accommodated in the accommodation recess 34 .
  • the third tab portion 123 may be entirely accommodated in the accommodation recess 34 , or may be only partially accommodated in the accommodation recess 34 .
  • the connecting plate 33 can improve the overall strength of the isolation member 30 and can also surround the third tab 123 to insulate and isolate the third tab 123 from at least part of the housing 20 to improve safety.
  • the battery cell 6 further includes an insulating member 40 received within the housing 20 and connected to the housing 20 . At least part of the connecting plate 33 is located between the insulating member 40 and the end surface 111 of the main body part 11 .
  • the insulating member 40 and the end surface 111 can limit the connection plate 33 from both sides, so as to reduce the shaking amplitude of the isolation member 30 when the battery cell 6 is impacted by an external impact.
  • the insulation component 40 is made of plastic.
  • the insulating member 40 is disposed on the inner surface of the end cap.
  • At least part of the connecting plate 33 is sandwiched between the insulating member 40 and the end surface 111 of the main body part 11 in the first direction X perpendicular to the end surface 111 .
  • the insulating member 40 and the end surface 111 of the main body 11 clamp at least part of the connecting plate 33 from both sides to limit the movement of the connecting plate 33 in the first direction 30
  • the amplitude of shaking along the first direction X improves safety.
  • At least a portion of the insulating member 40 is received within the receiving recess 34 .
  • the portion of the insulating member 40 accommodated in the receiving recess 34 can limit the isolation member 30 , thereby limiting the movement of the isolation member 30 in a direction perpendicular to the first direction X.
  • the inner surface 33a of the connecting plate 33 is provided with a stepped surface 33b, and the portion of the insulating member 40 accommodated in the receiving recess 34 is pressed against the stepped surface 33b.
  • the inner surface 33 a of the connecting plate 33 is the surface of the connecting plate 33 that defines the receiving recess 34 .
  • step surface 33b There may be one step surface 33b or a plurality of step surfaces 33b. In some examples, there is only one step surface 33 b , and the step surface 33 b circles along the circumferential direction of the connecting plate 33 . In other examples, there are multiple step surfaces 33b , and the plurality of step surfaces 33b are arranged at intervals along the circumferential direction of the connecting plate 33 .
  • the insulating member 40 presses against the step surface 33b to limit the movement of the isolation member 30 in the first direction X.
  • the step surface 33b is parallel to the end surface 111 .
  • the inner surface 33a of the connecting plate 33 also includes a limiting surface 33c connected to the step surface 33b.
  • the limiting surface 33c surrounds the outside of the insulating member 40 and is in contact with the insulating member 40.
  • the portion of the insulating member 40 accommodated in the receiving recess 34 is in contact with the limiting surface 33c to limit the movement of the limiting surface 33c.
  • the insulation member 40 and the end surface 111 clamp the isolation member 30 to achieve the fixation of the isolation member 30 in the first direction
  • One direction is fixed in the X direction.
  • the portion of the insulating member 40 accommodated in the receiving recess 34 is engaged with the connecting plate 33 , thereby achieving the fixation of the isolating member 30 .
  • the portion of the insulating member 40 accommodated in the accommodating recess 34 may also be welded to the connecting plate 33 .
  • the isolation plate 32 includes a first isolation plate 321 and a second isolation plate 322 that are spaced apart, and a channel 31 is formed between the first isolation plate 321 and the second isolation plate 322 .
  • the connecting plate 33 includes a first connecting plate 331 and a second connecting plate 332.
  • the first connecting plate 331 and the first isolating plate 321 are integrally formed.
  • the second connecting plate 332 is integrally formed with the second isolating plate 322.
  • the first connecting plate 331 and the second isolating plate 322 are integrally formed.
  • the second connecting plates 332 are independently formed and connected to each other.
  • the first connecting plate 331 and the second connecting plate 332 can be connected by snapping, welding, adhesion or other methods.
  • the isolation member 30 includes two sub-members, one sub-member includes a first connecting plate 331 and a first isolation plate 321 , and the other sub-member includes a second connecting plate 332 and a second isolation plate 322 .
  • the two sub-components are formed independently.
  • the isolation member 30 may be assembled first, and then the tab 12 is passed through the channel 31 of the isolation member 30 , and then the tab 12 and the electrode lead-out member 21 are connected. In other examples, the tab 12 and the electrode lead-out 21 may be connected first, and then two sub-components are installed from both sides of the tab 12 to install the assembled isolation member 30 on the tab 12 .
  • the first connecting plate 331 is clamped to the second connecting plate 332 .
  • the snap connection can simplify the assembly process of the first connecting plate 331 and the second connecting plate 332.
  • first clamping portion 3311 is provided at both ends of the first isolation plate 321 along the third direction Z, and the first direction X, the second direction Y, and the third direction Z are two perpendicular to each other.
  • Two second clamping parts 3321 are provided at both ends of the second isolation plate 322 along the third direction Z.
  • the cooperation of the two first clamping parts 3311 and the two second clamping parts 3321 can achieve the fixation of the first connecting plate 331 and the second connecting plate 332 and further enhance the connection between the first connecting plate 331 and the second connecting plate 332 stability and reliability.
  • At least one first latching part 3311 is provided with a protrusion P1
  • at least one second latching part 3321 is provided with a latching hole P2
  • at least part of the protrusion P1 is accommodated in the latching hole P2 to secure the The first engaging part 3311 is engaged with the second engaging part 3321.
  • one first clamping part 3311 is provided with a protrusion P1, and the other first clamping part 3311 is provided with a clamping hole P2; the first clamping part 3311 provided with the protrusion P1 cooperates with the second clamping
  • the connecting portion 3321 is provided with a engaging hole P2, and the second engaging portion 3321 that cooperates with the first engaging portion 3311 provided with the engaging hole P2 is provided with a protrusion P1.
  • the two first engaging parts 3311 are both provided with protrusions P1, and the two second engaging parts 3321 are both provided with engaging holes P2.
  • first engaging portion 3311 and the second engaging portion 3321 are engaged through the cooperation of the protrusion P1 and the engaging hole P2.
  • one first clamping part 3311 is provided with a protrusion P1, and the other first clamping part 3311 is provided with a clamping hole P2;
  • the latching part 3321 is provided with a latching hole P2, and the second latching part 3321 that cooperates with the first latching part 3311 provided with the latching hole P2 is provided with a protrusion P1.
  • the protrusion P1 is made of flexible material.
  • the protrusion P1 includes two spaced sub-protrusions P11. Each sub-protrusion P11 is provided with a flange. After the sub-protrusion P11 passes through the clamping hole P2, the flange is stuck in the second clamping portion. 3321 on.
  • Figure 14 is a schematic three-dimensional structural diagram of an isolation member of a battery cell provided by other embodiments of the present application.
  • Figure 15 is a partial cross-sectional schematic diagram of a battery cell provided by other embodiments of the present application.
  • the tab 12 includes a plurality of tab layers arranged in a stack.
  • the plurality of tab layers converge toward the side area of the end surface 111 of the main body 11 , and the channel 31 is located on the isolation member 30 . Side area.
  • the plurality of tab layers are gathered toward the side area of the end surface 111 of the main body 11 , and then the part of the tab layer passing through the channel 31 is directly bent to one side, which ensures that The connection area between the tab layer and the electrode lead-out member 21. Therefore, by converging the plurality of tab layers toward the side areas of the end surface 111 of the main body 11 , the number of times the tab layers are bent can be reduced.
  • tab connecting parts 51 there are multiple tab connecting parts 51 .
  • the plurality of tab connecting portions 51 are stacked and connected to a plurality of tab layers.
  • the tab connecting portion 51 , the electrode connecting portion 52 and the third tab portion 123 are all parallel to the end surface 111 of the main body portion 11 .
  • This embodiment can reduce the space occupied by the adapter 50 and the third lug 123 in the direction perpendicular to the end surface 111 and improve the energy density of the battery cell 6 .
  • the strength of the local area of the adapter 50 can be reduced by opening through holes 532 , grooves, notches and other structures on the adapter 50 , thereby forming a weak structure 531 in the second bending section 53 .
  • the electrode assembly 10 includes a main body 11 and tabs 12 extending from an end surface 111 of the main body 11 .
  • the tab 12 includes a first tab part 121 , a second tab part 122 and a third tab part 123 .
  • the first tab part 121 is connected to the main body part 11 , a part of the first tab part 121 is located between the first isolation plate 321 and the end surface 111 , and the other part of the first tab part 121 is located between the second isolation plate 322 and the end surface 111 between.
  • the second tab portion 122 is connected to an end of the first tab portion 121 away from the main body portion 11 , and the second tab portion 122 is received in the channel 31 .
  • the third pole portion 123 includes a first section 1231 , a second section 1232 and a first bent section 1233 .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本申请实施例提供一种电池单体、电池以及用电装置。电池单体包括外壳、电极组件和隔离构件。外壳设有电极引出件。电极组件容纳于外壳内，电极组件包括主体部和从主体部的端面引出的极耳。隔离构件的至少部分设置于电极引出件和主体部的端面之间，隔离构件设有通道，极耳穿过通道并与电极引出件电连接。隔离构件可以将极耳的穿过通道的至少部分与主体部的端面绝缘隔离，从而在电池单体受到外部冲击时，降低极耳插入主体部的风险，减少短路隐患，提高安全性。

Description

电池单体、电池以及用电装置 技术领域
本申请涉及电池技术领域，并且更具体地，涉及一种电池单体、电池以及用电装置。
背景技术
电池单体广泛用于电子设备，例如手机、笔记本电脑、电瓶车、电动汽车、电动飞机、电动轮船、电动玩具汽车、电动玩具轮船、电动玩具飞机和电动工具等等。
如何提高电池单体的安全性，是电池技术中的一个研究方向。
发明内容
本申请提供了一种电池单体、电池以及用电装置，其能提高安全性。
第一方面，本申请实施例提供了一种电池单体，包括外壳、电极组件和隔离构件。外壳设有电极引出件。电极组件容纳于外壳内，电极组件包括主体部和从主体部的端面引出的极耳。隔离构件的至少部分设置于电极引出件和主体部的端面之间，隔离构件设有通道，极耳穿过通道并与电极引出件电连接。
上述技术方案中，隔离构件可以将极耳的穿过通道的至少部分与主体部的端面绝缘隔离，从而在电池单体受到外部冲击时，降低极耳插入主体部的风险，减少短路隐患，提高安全性。
在一些实施方式中，极耳包括多个极耳层，多个极耳层在通道内的部分层叠设置。通道沿自身宽度方向的尺寸为W 1，多个极耳层的总厚度为T 1，W 1和T 1满足：0.5mm≤W 1-T 1≤4mm。
通过将W 1-T 1的值限定在0.5mm-4mm，使多个极耳层在通道内处于未被夹紧的状态，这样既可以在一定程度上束缚多个极耳层，减小极耳层的变形，还能够减小极耳层与通道的壁之间的摩擦力，降低极耳层摩擦磨损的风险。
在一些实施方式中，W 1和T 1满足：1mm≤W 1-T 1≤3mm。
在一些实施方式中，通道的轴向与主体部的端面垂直，以降低极耳穿过通道的难度，减小极耳层弯折的最大角度。
在一些实施方式中，极耳包括第一极耳部、第二极耳部和第三极耳部。第一极耳部连接于主体部，第一极耳部的至少部分位于隔离构件和主体部之间。第二极耳部连接于第一极耳部的背离主体部的一端，第二极耳部容纳于通道内。第三极耳部连接于第二极耳部的背离第一极耳部的一端，并用于连接电极引出件。隔离构件的至少部分位于第三极耳部与主体部之间，以将第三极耳部与主体部的端面绝缘隔离，从而降 低第三极耳部插入主体部的风险，提高安全性。
在一些实施方式中，第三极耳部包括第一段、第二段和第一弯折段。第一段连接于第二极耳部，隔离构件的至少部分位于第一段与主体部之间。第二段位于第一段背离主体部的一侧，并连接于电极引出件。第一弯折段用于连接第一段和第二段。
将第三极耳部折弯成两层，以减小第三极耳部在垂直于端面的方向上占用的空间，提高电池单体的能量密度。隔离构件可以将第一段与主体部的端面绝缘隔离，从而降低第一段插入主体部的风险，提高安全性。
在一些实施方式中，第二段平行于主体部的端面，以减小第三极耳部在垂直于端面的方向上占用的空间，提高电池单体的能量密度。
在一些实施方式中，第三极耳部设置有第一熔接区，第一熔接区仅位于第二段上，第一熔接区的至少部分连接于电极引出件。
在弯折第三极耳部的过程中，使第一熔接区仅位于第二段上，进而使第一熔接区避开第三极耳部的折弯位置，降低第一熔接区开裂的风险。
在一些实施方式中，电池单体还包括转接件。转接件包括极耳连接部、电极连接部和第二弯折段。极耳连接部连接于第三极耳部。电极连接部位于极耳连接部背离主体部的一侧，并连接于电极引出件。第二弯折段用于连接极耳连接部和电极连接部。通过设置转接件来连接第三极耳部和电极引出件，可以减小对第三极耳部的尺寸的要求，并降低装配难度。
在一些实施方式中，极耳连接部、电极连接部以及第三极耳部均平行于主体部的端面，以减小转接件和第三极耳部在垂直于端面的方向上占用的空间，提高电池单体的能量密度。
在一些实施方式中，第二弯折段设置有薄弱结构。通过设置薄弱结构，以引导转接件在设定的区域折弯。
在一些实施方式中，转接件设置有第二熔接区和第三熔接区，第二熔接区仅设置在极耳连接部并用于与第三极耳部相连，第三熔接区仅设置在电极连接部并用于与电极引出件相连。
在弯折转接件的过程中，使第二熔接区仅设置在极耳连接部、第三熔接区仅设置在电极连接部，进而使第二熔接区和第三熔接区避开转接件的折弯位置，从而降低第二熔接区和第三熔接区开裂的风险。
在一些实施方式中，隔离构件包括隔离板，隔离板设有通道，且隔离板的至少部分位于第三极耳部和主体部之间。隔离板可以将第三极耳部与主体部的端面绝缘隔离，从而降低第三极耳部插入主体部的风险，提高安全性。
在一些实施方式中，隔离构件还包括连接板，连接板环绕在隔离板的外侧，连接板凸出于隔离板的背离主体部的一侧，以与隔离板共同限定出容纳凹部。第三极耳部的至少部分容纳于容纳凹部。连接板可以提高隔离构件的整体强度，还能够环绕第三极耳部，以将第三极耳部与外壳的至少部分绝缘隔离，提高安全性。
在一些实施方式中，电池单体还包括容纳于外壳内并连接于外壳的绝缘构件。连接板的至少部分位于绝缘构件和主体部的端面之间。绝缘构件和端面可以从两侧对 连接板进行限位，以在电池单体受到外部冲击时，降低隔离构件晃动的幅度。
在一些实施方式中，在垂直于端面的第一方向上，连接板的至少部分夹持于绝缘构件和主体部的端面之间。绝缘构件和主体部的端面从两侧夹持连接板的至少部分，以在第一方向上限制连接板的移动，进而在电池单体受到外部冲击时，降低隔离构件沿第一方向晃动的幅度，提高安全性。
在一些实施方式中，绝缘构件的至少部分容纳于容纳凹部。绝缘构件的容纳于容纳凹部的部分可以对隔离构件进行限位，从而限制隔离构件在垂直于第一方向的方向上的移动。
在一些实施方式中，连接板的内表面设有台阶面，绝缘构件容纳于容纳凹部的部分抵压于台阶面。绝缘构件抵压于台阶面，以限制隔离构件在第一方向上的移动。
在一些实施方式中，连接板的内表面还包括连接于台阶面的限位面，限位面环绕在绝缘构件的外侧并与绝缘构件贴合。绝缘构件容纳于容纳凹部的部分与限位面贴合，以限制限位面的移动。
在一些实施方式中，隔离构件为一体成型结构。将隔离构件设置为一体成型，可以使隔离构件具有较高的整体强度，并可省去隔离构件的组装工艺。
在一些实施方式中，隔离板包括间隔设置的第一隔离板和第二隔离板，第一隔离板和第二隔离板之间形成通道。连接板包括第一连接板和第二连接板，第一连接板和第一隔离板一体形成，第二连接板与第二隔离板一体形成，第一连接板与第二连接板独立形成并彼此连接。
上述技术方案的隔离构件分体成型，可以使隔离构件与电极组件的装配方式更为灵活。
在一些实施方式中，第一连接板卡接于第二连接板。卡接可以简化第一连接板和第二连接板的装配工艺。
在一些实施方式中，第一连接板包括两个第一卡接部，两个第一卡接部分别设置于第一隔离板相对两端。第二连接板包括两个第二卡接部，两个第二卡接部分别设置于第二隔离板相对两端。第一卡接部卡接于第二卡接部。两个第一卡接部和两个第二卡接部的配合能够实现第一连接板和第二连接板的固定，并进一步增强第一连接板和第二连接板连接的稳定性和可靠性。
在一些实施方式中，至少一个第一卡接部设有凸起，至少一个第二卡接部设有卡接孔，凸起的至少部分容纳于卡接孔，以将第一卡接部卡接于第二卡接部。通过凸起和卡接孔的配合，以实现第一卡接部和第二卡接部的卡接。
在一些实施方式中，隔离板包括间隔设置的第一隔离板和第二隔离板，第一隔离板和第二隔离板之间形成通道。第一极耳部的一部分位于第一隔离板和主体部之间，第一极耳部的另一部分位于第二隔离板和主体部之间。第一隔离板和第二隔离板可以对第一极耳部进行限位，以在电池单体受到外部冲击时，减小第一极耳部的晃动和变形。
在一些实施方式中，第一隔离板包括面向主体部的第一斜面。在垂直于端面的第一方向上，第一斜面靠近通道的一端与主体部的端面之间的最小距离大于第一斜面 远离通道的一端与主体部的端面之间的最小距离。在第一方向上，第一极耳部的一部分位于第一斜面和主体部的端面之间。
通过设置第一斜面，可减小第一隔离板与第一极耳部之间的间隙，进而使第一隔离板能够对第一极耳部进行限位和整形，并有助于维持第一极耳部的形貌。
在一些实施方式中，第一斜面与端面之间的夹角为α，第一极耳部沿第一方向的尺寸为h 0，第一极耳部沿第二方向的尺寸为W 0，第二方向为第一极耳部的多个极耳层的层叠方向且垂直于第一方向。α、h 0以及W 0满足：tanα≥2h 0/W 0。
上述技术方案可以减小第一斜面与第一极耳部的之间的压力，降低第一极耳部的极耳层开裂的风险。
在一些实施方式中，α、h 0以及W 0满足：tanα＝2h 0/W 0。第一斜面大体平行于第一极耳部的极耳斜面，进而减小第一斜面与第一极耳部之间的间隙，使第一斜面能够对第一极耳部进行有效地整形。
在一些实施方式中，第一斜面与第一极耳部相抵。第一斜面抵压于第一极耳部，从而对第一极耳部进行整形，并维持第一极耳部的形貌。
在一些实施方式中，第二隔离板包括面向主体部的第二斜面。在第一方向上，第二斜面靠近通道的一端与主体部的端面之间的最小距离大于第二斜面远离通道的一端与主体部的端面之间的最小距离。在第一方向上，第一极耳部的另一部分位于第二斜面和主体部的端面之间。
通过设置第二斜面，可减小第二隔离板与第一极耳部之间的间隙，进而使第二隔离板能够对第一极耳部进行整形，并有助于维持第一极耳部的形貌。
在一些实施方式中，第一斜面与端面之间的夹角等于第二斜面与端面之间的夹角，以减小第一极耳部最外两侧的极耳层弯折角度的差异，有助于改善第一极耳部的形态。
在一些实施方式中，第一隔离板的最小厚度为d1，d1≥0.5mm。
上述技术方案可以使第一隔离板具有一定的强度，进而使第一隔离板能够分隔第三极耳部和主体部，降低第一隔离板变形的风险。
在一些实施方式中，第二隔离板的最小厚度为d2，d2≥0.5mm。
上述技术方案可以使第二隔离板具有一定的强度，进而使第二隔离板能够分隔第三极耳部和主体部，降低第二隔离板变形的风险。
在一些实施方式中，第一隔离板的远离通道的端部的最小厚度大于第一隔离板的靠近通道的端部的最小厚度。第一隔离板的远离通道的端部具有较大的厚度，以在第一隔离板与第一极耳部相互挤压时，降低第一隔离板绕第一隔离板的远离通道的端部弯曲的风险。
在一些实施方式中，第三极耳部包括第一段、第二段和第一弯折段。第一段连接于第二极耳部；第二段位于第一段背离主体部的一侧，并连接于电极引出件。第一弯折段用于连接第一段和第二段，第一隔离板的至少部分位于第一弯折段与主体部之间。第一隔离板将第一弯折段与主体部绝缘隔离，以降低第一弯折段插入主体部的风险，提高安全性。
在一些实施方式中，第一隔离板在背向主体部的端面一侧设有第三斜面。在垂直于端面的第一方向上，第三斜面靠近通道的一端与电极引出件之间的最小距离小于第三斜面远离通道的一端与电极引出件之间的最小距离。在第一方向上，第一段的至少部分和第二段的至少部分位于第三斜面和电极引出件之间。
通过设置第三斜面，以增大第一隔离板的背离端面的一侧的空间，进而为第一弯折段提供更多的空间，降低第一弯折段受压的风险。
在一些实施方式中，极耳包括多个极耳层，多个极耳层的总厚度为T 1。在第一方向上，第三斜面靠近通道的一端与电极引出件之间的最小距离为H 1，H 1＞2T 1。
第一段和第二段大体沿第一方向层叠，两者在第一方向上占用的空间大体为2T 1；上述技术方案使H 1＞2T 1，以为第一段和第二段提供空间，减小第一段与第一隔离板之间的压力，减少第一段与第一隔离板之间的摩擦，降低第一段磨损、开裂的风险。
在一些实施方式中，在第一方向上，第三斜面远离通道的一端与电极引出件之间的最小距离为H 2，H 2＞3T 1。
上述技术方案使H 2＞3T 1，以为第一弯折段提供更多的空间，降低第一弯折段受压的风险。
在一些实施方式中，第一隔离板在背向主体部的端面一侧设有第一平面，第一平面垂直于第一方向并连接于第三斜面远离通道的一端。在第一方向上，第一平面的至少部分位于第一弯折段与主体部之间。在第一方向上，第一平面与电极引出件之间的最小距离大于3T 1。
第一隔离板的与第一平面对应的部分将第一弯折段与主体部绝缘隔离，以降低第一弯折段插入主体部的风险。第一平面与电极引出件之间的最小距离大于3T 1，这样可在第一平面背离主体部的一侧形成更多的空间，以降低第一弯折段与第一平面彼此挤压的风险。
在一些实施方式中，第一隔离板包括面向主体部的第一斜面。在第一方向上，第一斜面靠近通道的一端与主体部的端面之间的最小距离大于第一斜面远离通道的一端与主体部的端面之间的最小距离；在第一方向上，第一极耳部的一部分位于第一斜面和主体部的端面之间。在第一方向上，第一隔离板的位于第一斜面和第一平面之间的部分的最小厚度大于第一隔离板的位于第一斜面和第三斜面之间的部分的最小厚度。
第一斜面可以对第一极耳部整形，以降低第一极耳部变形的风险。第一斜面和第二斜面的配合可以将第一隔离板面向端面一侧的空间利用到第一隔离板背离端面一侧的空间，使得第一隔离板背离端面一侧的供第三极耳部折弯的空间最大化。通过设置第一平面，可使第一隔离板的位于第一斜面和第一平面之间的部分具有较大的厚度，从而降低第一隔离板绕第一隔离板的远离通道的端部弯曲的风险。
在一些实施方式中，极耳包括层叠设置的多个极耳层，多个极耳层向着主体部的端面的中部区域收拢，通道位于隔离构件的中部区域。
将多个极耳层向着主体部的端面的中部区域收拢，可以减小极耳层的错位。将通道设于隔离构件的中部区域，可以减小通道与多个极耳层的收拢部分之间的距离，便于多个极耳层从通道中穿过。
在一些实施方式中，极耳包括层叠设置的多个极耳层，多个极耳层向着主体部的端面的侧部区域收拢，通道位于隔离构件的侧部区域。将多个极耳层向着主体部的端面的侧部区域收拢，可以减少极耳层弯折的次数。将通道设于隔离构件的侧部区域，可以减小通道与多个极耳层的收拢部分之间的距离，便于多个极耳层从通道中穿过。
第二方面，本申请一些实施例提供了一种电池，其包括多个第一方面任一实施方式的电池单体。
第三方面，本申请一些实施例提供了一种用电装置，其包括第一方面任一实施方式的电池单体，电池单体用于提供电能。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据附图获得其他的附图。
图1为本申请一些实施例提供的车辆的结构示意图；
图2为本申请一些实施例提供的电池的爆炸示意图；
图3为图2所示的电池模块的爆炸示意图；
图3为本申请一些实施例提供的电池单体的爆炸示意图；
图4为本申请一些实施例提供的电池单体的局部剖视示意图；
图5为本申请一些实施例提供的电池单体的电极组件的结构示意图；
图6为图4在方框A处的放大示意图；
图7为本申请一些实施例提供的电池单体的电极组件的极耳的剖视示意图；
图8为本申请一些实施例提供的电池单体的隔离构件的剖视示意图；
图9为图6在方框B处的放大示意图；
图10为图6在方框C处的放大示意图；
图11为本申请一些实施例提供的电池单体的隔离构件的立体结构示意图；
图12为图11在圆框D处的放大示意图；
图13为图12所示的第一卡接部和第二卡接部的剖视示意图；
图14为本申请另一些实施例提供的电池单体的隔离构件的立体结构示意图；
图15为本申请另一些实施例提供的电池单体的局部剖视示意图；
图16为本申请又一些实施例提供的电池单体的局部剖视示意图；
图17为本申请又一些实施例提供的电池单体的转接件的结构示意图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领 域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“附接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
本申请中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请的实施例中，相同的附图标记表示相同的部件，并且为了简洁，在不同实施例中，省略对相同部件的详细说明。应理解，附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸，以及集成装置的整体厚度、长宽等尺寸仅为示例性说明，而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请中术语“平行”不仅包括绝对平行的情况，也包括了工程上常规认知的大致平行的情况；同时，“垂直”也不仅包括绝对垂直的情况，还包括工程上常规认知的大致垂直的情况。
本申请中，电池单体可以包括锂离子电池单体、锂硫电池单体、钠锂离子电池单体、钠离子电池单体或镁离子电池单体等，本申请实施例对此并不限定。
本申请的实施例所提到的电池是指包括多个电池单体以提供更高的电压和容量的单一的物理模块。电池一般可包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
电池单体包括电极组件和电解液，电极组件包括正极极片、负极极片和隔离膜。电池单体主要依靠金属离子在正极极片和负极极片之间移动来工作。正极极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面；正极集流体包括正极集流部和正极极耳，正极集流部涂覆有正极活性物质层，正极极耳未涂覆正极活性物质层。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质层包括正极活性物质，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极 极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面；负极集流体包括负极集流部和负极极耳，负极集流部涂覆有负极活性物质层，负极极耳未涂覆负极活性物质层。负极集流体的材料可以为铜，负极活性物质层包括负极活性物质，负极活性物质可以为碳或硅等。隔离膜的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。
电极组件包括主体部和从主体部引出的极耳部，主体部为电极组件的电生产部，其内部的活性物质用于与电解液等发生电化学反应，以产生充放电过程。极耳用于与外部电连接，以实现电极组件的充放电。
发明人注意到，在电池单体受到外部冲击时，极耳可能会出现变形，变形的极耳可能会插入到主体部，从而引发正负极导通的风险，造成安全隐患。
鉴于此，本申请实施例提供了一种技术方法，其通过在电池单体的内部设置隔离构件，以将极耳的至少部分与主体部绝缘隔离，降低极耳插入主体部的风险，提高安全性。
本申请实施例描述的技术方案适用于使用电池的用电装置。
用电装置可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。本申请实施例对上述用电装置不做特殊限制。
以下实施例为了方便说明，以用电装置为车辆为例进行说明。
图1为本申请一些实施例提供的车辆的结构示意图。
如图1所示，车辆1的内部设置有电池2，电池2可以设置在车辆1的底部或头部或尾部。电池2可以用于车辆1的供电，例如，电池2可以作为车辆1的操作电源。
车辆1还可以包括控制器3和马达4，控制器3用来控制电池2为马达4供电，例如，用于车辆1的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池2不仅仅可以作为车辆1的操作电源，还可以作为车辆1的驱动电源，代替或部分地代替燃油或天然气为车辆1提供驱动动力。
图2为本申请一些实施例提供的电池的爆炸示意图。
如图2所示，电池2包括箱体5和电池单体6，电池单体6容纳于箱体5内。
箱体5用于容纳电池单体6，箱体5可以是多种结构。在一些实施例中，箱体5可以包括第一箱体部5a和第二箱体部5b，第一箱体部5a与第二箱体部5b相互盖合，第一箱体部5a和第二箱体部5b共同限定出用于容纳电池单体6的容纳空间5c。第二箱体部5b可以是一端开口的空心结构，第一箱体部5a为板状结构，第一箱体部5a盖合于第二箱体部5b的开口侧，以形成具有容纳空间5c的箱体5；第一箱体部5a和第 二箱体部5b也均可以是一侧开口的空心结构，第一箱体部5a的开口侧盖合于第二箱体部5b的开口侧，以形成具有容纳空间5c的箱体5。当然，第一箱体部5a和第二箱体部5b可以是多种形状，比如，圆柱体、长方体等。
为提高第一箱体部5a与第二箱体部5b连接后的密封性，第一箱体部5a与第二箱体部5b之间也可以设置密封件，比如，密封胶、密封圈等。
假设第一箱体部5a盖合于第二箱体部5b的顶部，第一箱体部5a亦可称之为上箱盖，第二箱体部5b亦可称之为下箱体。
在电池2中，电池单体6可以是一个，也可以是多个。若电池单体6为多个，多个电池单体6之间可串联或并联或混联，混联是指多个电池单体6中既有串联又有并联。多个电池单体6之间可直接串联或并联或混联在一起，再将多个电池单体6构成的整体容纳于箱体5内；当然，也可以是多个电池单体6先串联或并联或混联组成电池模块，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体5内。
图3为本申请一些实施例提供的电池单体的爆炸示意图；图4为本申请一些实施例提供的电池单体的局部剖视示意图；图5为本申请一些实施例提供的电池单体的电极组件的结构示意图；图6为图4在方框A处的放大示意图；图7为本申请一些实施例提供的电池单体的电极组件的极耳的剖视示意图；图8为本申请一些实施例提供的电池单体的隔离构件的剖视示意图。
参照图3至图8，本申请实施例的电池单体6包括外壳20、电极组件10以及隔离构件30。外壳20设有电极引出件21。电极组件10容纳于外壳20内。电极组件10包括主体部11和从主体部11的端面111引出的极耳12。隔离构件30的至少部分设置于电极引出件21和主体部11的端面111之间。隔离构件30设有通道31，极耳12穿过通道31并与电极引出件21电连接。
外壳20为空心结构，其内部形成用于容纳电极组件10和电解液的容纳腔。外壳20的形状可根据电极组件10的具体形状来确定。比如，若电极组件10为长方体结构，则可选用长方体外壳；若电极组件10为圆柱结构，则可选用圆柱外壳。
外壳20的材质可以是多种，比如，外壳20的材质可以是金属或塑料。可选地，外壳20的材质可以是铜、铁、铝、钢、铝合金等。
电极引出件21用于将电极组件10与电池单体6外部的电路电连接，以实现电极组件10的充放电。示例性地，电极引出件21的至少部分露出到电池单体6的外部，以便于与其它构件(例如汇流部件)连接，进而将电极组件10产生的电能引出。
电极引出件21可以直接连接于极耳12，也可以经由其它导电结构间接地连接于极耳12。
电极组件10包括正极极片和负极极片。示例性地，电极组件10通过离子在正极极片和负极极片中的嵌入/脱出时的氧化和还原反应来产生电能。
可选地，电极组件10还包括隔离膜，隔离膜用于将正极极片和负极极片绝缘隔离。
电极组件10可以是卷绕式电极组件、叠片式电极组件或其它类型的电极组件。示例性地，电极组件10可以是通过卷绕正极极片、隔离膜和负极极片形成。
电极组件10包括主体部11和从主体部11的端面111引出的极耳12。示例性地，主体部11可以包括正极极片的涂覆有活性物质层的部分、负极极片的涂覆有活性物质层的部分和隔离膜。活性物质层中的活性物质用于与电解液等发生电化学反应，以产生充放电过程。可选地，隔离膜的边缘形成主体部11的端面111。
极耳12可设置为多个。多个极耳12包括正极极耳和负极极耳，正极极耳和负极极耳可以从主体部11的同一端引出，也可以分别从主体部11的相反的两端引出。示例性地，电极引出件21可为两个，两个电极引出件21分别电连接于正极极耳和负极极耳。
隔离构件30可以整体位于电极引出件21和主体部11之间，也可仅部分位于电极组件10和主体部11之间。
隔离构件30可以是一体式结构，也可以是分体式结构。示例性地，隔离构件30可由多个独立成型的零件连接而成。
示例性地，通道31可用于将隔离构件30与端面111之间的空间连通于隔离构件30与电极引出件21之间的空间，以使极耳12能够连接于电极引出件21。
极耳12容纳于通道31的部分与通道31可以是过盈配合、间隙配合或过渡配合。
在本申请实施例中，隔离构件30可以将极耳12的穿过通道31的至少部分与主体部11的端面111绝缘隔离，从而在电池单体6受到外部冲击时，降低极耳12插入主体部11的风险，减少短路隐患，提高安全性。
在一些实施例中，外壳20包括端盖22和壳体23。
壳体23是用于配合端盖22以形成电池单体6的内部空腔的部件，形成的内部空腔可以用于容纳电极组件10、电解液以及其他部件。
壳体23和端盖22可以是独立的部件。示例性的，可以于壳体23上设置开口，通过在开口处使端盖22盖合开口，以形成电池单体6的内部空腔。
壳体23可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。具体地，壳体23的形状可以根据电极组件10的具体形状和尺寸大小来确定。壳体23的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。
端盖22的形状可以与壳体23的形状相适应以配合壳体23。可选地，端盖22可以由具有一定硬度和强度的材质(如铝合金)制成，这样，端盖22在受挤压碰撞时就不易发生形变，使电池单体6能够具备更高的结构强度，安全性能也可以有所提高。
在一些实施例中，壳体23相对的两端均具有开口，端盖22设置为两个，两个端盖22分别盖合于壳体23两端的开口。
在一些实施例中，电极引出件21和端盖22可以是独立的部件，电极引出件21可以安装于端盖22。在一些可替代地实施例中，也可以将电极引出件21和端盖22一体成型。
在一些实施例中，极耳12包括多个极耳层12a，多个极耳层12a层叠设置。通过设置多个极耳层12a，可以增大极耳12的过流能力，减少极耳12的产热，降低极耳 12熔断的风险。
示例性地，极耳层12a为金属箔材，其表面未涂覆活性物质层。
多个极耳层12a向着主体部11的端面111的中部区域收拢，也可以向着主体部11的端面111的侧部区域收拢。
在一些实施例中，极耳12设有第一熔接区12b；在第一熔接区12b，多个极耳层12a连接。示例性地，可通过超声波焊接将多个极耳层12a焊接以形成第一熔接区12b。通过设置第一熔接区12b，可以将多个极耳层12a收拢并连接，进而降低多个极耳层12a在后续的装配工序中错位的风险。
在一些实施例中，极耳12包括多个极耳层12a，多个极耳层12a在通道31内的部分层叠设置。通道31沿自身宽度方向的尺寸为W 1，多个极耳层12a的总厚度为T 1，W 1和T 1满足：W 1＞T 1。
各极耳层12a的厚度为T 0，极耳12的极耳层12a的数量为n，n为大于1的正整数。T 1＝T 0×n。
通道31的宽度方向大体平行于位于通道31内的多个极耳层12a的层叠方向。
如果W 1≤T 1，那么通道31的壁会夹持多个极耳层12a，当主体部11因电池单体6受到外部冲击而晃动时，极耳层12a的位于通道31内的部分难以通过变形来释放应力，这会造成极耳层12a应力集中，引发极耳层12a开裂的风险。本申请实施例使W 1＞T 1，以为通道31内的极耳层12a提供活动空间，减小应力集中，降低极耳层12a开裂的风险。
在一些实施例中，W 1和T 1满足：0.5mm≤W 1-T 1≤4mm。
W 1-T 1的值越小，极耳层12a在通道31内的活动空间越小。如果W 1-T 1过小，那么当主体部11因电池单体6受到外部冲击而晃动时，极耳层12a容易与通道31的壁摩擦，引发极耳层12a磨损的风险。鉴于此，发明人使W 1-T 1的值大于或等于0.5mm，以降低极耳层12a摩擦磨损的风险，保证极耳12的过流能力。
如果W 1-T 1的值过大，那么通道31的壁难以有效地束缚极耳层12a，极耳层12a容易过度变形，引发极耳层12a倒插到主体部11的风险。鉴于此，发明人使W 1-T 1的值小于或等于4mm，以有效地束缚多个极耳层12a。
综上所述，通过将W 1-T 1的值限定在0.5mm-4mm，使多个极耳层12a在通道31内处于未被夹紧的状态，这样既可以在一定程度上束缚多个极耳层12a，减小极耳层12a的变形，还能够减小极耳层12a与通道31的壁之间的摩擦力，降低极耳层12a摩擦磨损的风险。
可选地，W 1-T 1的值为0.5mm、1mm、1.5mm、2mm、2.5mm、3mm、3.5mm或4mm。
在一些实施例中，W 1和T 1满足：1mm≤W 1-T 1≤3mm。
在一些实施例中，在装配电池单体6的过程中，可先将极耳12从通道31内穿过，再连接极耳12和电极引出件21。在可替代地实施例中，也可以先将极耳12和电极引出件21连接，再安装隔离构件30。
在一些实施例中，通道31的轴向与端面111之间的角为锐角、直角或钝角。
通道31的轴向为平行于通道31的中心轴的方向。示例性地，通道31的轴向垂 直于通道31的宽度方向。
示例性地，通道31包括沿自身宽度方向相对设置的两个侧壁311，多个极耳层12a层叠于两个侧壁311之间。
示例性地，两个侧壁311平行于轴向且垂直于宽度方向。
在一些实施例中，通道31的轴向与主体部11的端面111垂直。本实施例可以降低极耳12穿过通道31的难度，减小极耳层12a弯折的最大角度。
在一些实施例中，通道31的轴向平行于第一方向X，通道31的宽度方向平行于第二方向Y。第一方向X与主体部11的端面111垂直。第二方向Y平行于端面111且垂直于第一方向X，多个极耳层12a的连接于主体部11的根部沿第二方向Y布置。
在一些实施例中，极耳12包括层叠设置的多个极耳层12a，多个极耳层12a向着主体部11的端面111的中部区域收拢，通道31位于隔离构件30的中部区域。
示例性地，端面111的中部区域是指端面111的靠近端面111沿第二方向Y的中心的区域。可选地，端面111的中部区域在第二方向Y上的尺寸与端面111在第二方向Y上的总尺寸之比为5％-20％。
示例性地，隔离构件30的中部区域是指隔离构件30的靠近隔离构件30沿第二方向Y的中心的区域。可选地，隔离构件30的中部区域在第二方向Y上的尺寸与隔离构件30在第二方向Y上的总尺寸之比为5％-20％。
将多个极耳层12a向着主体部11的端面111的中部区域收拢，可以减小极耳层12a的错位。将通道31设于隔离构件30的中部区域，可以减小通道31与多个极耳层12a的收拢部分之间的距离，便于多个极耳层12a从通道31中穿过。
在一些实施例中，极耳12包括第一极耳部121、第二极耳部122和第三极耳部123。第一极耳部121连接于主体部11，第一极耳部121的至少部分位于隔离构件30和主体部11之间。第二极耳部122连接于第一极耳部121的背离主体部11的一端，第二极耳部122容纳于通道31内。第三极耳部123连接于第二极耳部122的背离第一极耳部121的一端，并用于连接电极引出件21，隔离构件30至少部分位于第三极耳部123与主体部11之间。
在第一极耳部121，多个极耳层12a收拢在一起。在第一极耳部121，多个极耳层12a彼此独立，彼此之间无直接连接关系。
第三极耳部123可以直接连接于电极引出件21，以将电极引出件21与极耳12电连接。可替代地，第三极耳部123也可以通过其它导电结构间接地连接于电极引出件21，以将电极引出件21与极耳12电连接。
隔离构件30至少部分位于第三极耳部123与主体部11之间，以将第三极耳部123与主体部11的端面111绝缘隔离，从而降低第三极耳部123插入主体部11的风险，提高安全性。
在一些实施例中，第三极耳部123包括第一段1231、第二段1232和第一弯折段1233。第一段1231连接于第二极耳部122，隔离构件30至少部分位于第一段1231与主体部11之间。第二段1232位于第一段1231背离主体部11的一侧，并连接于电极引出件21。第一弯折段1233用于连接第一段1231和第二段1232。
第一弯折段1233相对于第一段1231弯折、相对第二段1232弯折。
第一段1231可平行于第二段1232。可替代地，第一段1231和第二段1232之间也可形成大于0°的夹角。
本申请实施例将第三极耳部123折弯成两层，以减小第三极耳部123在垂直于端面111的方向上占用的空间，提高电池单体6的能量密度。隔离构件30可以将第一段1231与主体部11的端面111绝缘隔离，从而降低第一段1231插入主体部11的风险，提高安全性。
在一些实施例中，第二段1232平行于主体部11的端面111。在本实施例中，平行指的是大体平行，允许存在一定的误差。示例性地，第二段1232与端面111的夹角小于10°，可认为第二段1232平行于主体部11的端面111。
本实施例使第一段1231和第二段1232均平行于主体部11的端面111，以减小第三极耳部123在垂直于端面111的方向上占用的空间，提高电池单体6的能量密度。
在一些实施例中，第一段1231平行于主体部11的端面111。示例性地，第一段1231与端面111的夹角小于10°，可认为第一段1231平行于主体部11的端面111。
在一些实施例中，第一段1231相对于第二极耳部122折弯。
在一些实施例中，第三极耳部123设置有第一熔接区12b，第一熔接区12b仅位于第二段1232上，第一熔接区12b的至少部分连接于电极引出件21。
第一熔接区12b可通过焊接、粘接、卡接或其它方式连接于电极引出件21。多个极耳层12a在第一熔接区12b连接，以降低多个极耳层12a在后续的装配工序中错位的风险。
在弯折第三极耳部123的过程中，使第一熔接区12b仅位于第二段1232上，进而使第一熔接区12b避开第三极耳部123的折弯位置，降低第一熔接区12b开裂的风险。
在一些实施例中，隔离构件30包括隔离板32，隔离板32设有通道31，且隔离板32的至少部分位于第三极耳部123和主体部11之间。
隔离板32可以是一体式结构，也可以是分体式结构。
隔离板32可以将第三极耳部123与主体部11的端面111绝缘隔离，从而降低第三极耳部123插入主体部11的风险，提高安全性。
在一些实施例中，隔离板32包括间隔设置的第一隔离板321和第二隔离板322，第一隔离板321和第二隔离板322之间形成通道31。第一极耳部121的一部分位于第一隔离板321和主体部11之间，第一极耳部121的另一部分位于第二隔离板322和主体部11之间。
第一隔离板321和第二隔离板322可以对第一极耳部121进行限位，以在电池单体6受到外部冲击时，减小第一极耳部121的晃动和变形。
在一些实施例中，第一隔离板321包括面向主体部11的第一斜面321a。在垂直于端面111的第一方向X上，第一斜面321a靠近通道31的一端与主体部11的端面111之间的最小距离大于第一斜面321a远离通道31的一端与主体部11的端面111之间的最小距离。在第一方向X上，第一极耳部121的一部分位于第一斜面321a和主体 部11的端面111之间。
第一极耳部121的多个极耳层12a收拢后会形成极耳斜面121a。通过设置第一斜面321a，可减小第一隔离板321与第一极耳部121之间的间隙，进而使第一隔离板321能够对第一极耳部121进行限位和整形，并有助于维持第一极耳部121的形貌。
示例性地，在装配隔离构件30和电极组件10的过程中，可以先将极耳12从通道31内穿过，然后沿靠近端面111的方向移动隔离构件30。在移动隔离构件30的过程中，第一斜面321a可以逐渐收拢极耳12的多个极耳层12a。
示例性地，第一斜面321a为平面，第一斜面321a与端面111之间的角为锐角。
在一些实施例中，第一斜面321a与端面111之间的夹角为α，第一极耳部121沿第一方向X的尺寸为h 0，第一极耳部121沿第二方向Y的尺寸为W 0，第二方向Y为第一极耳部121的多个极耳层12a的层叠方向且垂直于第一方向X。α、h 0以及W 0满足：tanα≥2h 0/W 0。
第一极耳部121的多个极耳层12a向中部收拢后会形成两个极耳斜面121a，2h 0/W 0大致为第一极耳部121的一个极耳斜面121a的正切值。
如果tanα小于2h 0/W 0，那么在装配隔离构件30时，第一斜面321a可能会过度挤压极耳斜面121a，引发极耳层12a开裂的风险。
本申请实施例使tanα≥2h 0/W 0，以减小第一斜面321a与第一极耳部121的之间的压力，降低第一极耳部121的极耳层12a开裂的风险。
在一些实施例中，α为15°-75°。可选地，α为15°、30°、45°、60°或75°。
在一些实施例中，α-arctan(2h 0/W 0)＜15°，这样可以使第一斜面321a与第一极耳部121之间具有较小的间隙。
在一些实施例中，α、h 0以及W 0满足：tanα＝2h 0/W 0。本实施例可使第一斜面321a大体平行于第一极耳部121的极耳斜面121a，进而减小第一斜面321a与第一极耳部121之间的间隙，使第一斜面321a能够对第一极耳部121进行有效地整形。
在一些实施例中，第一斜面321a与第一极耳部121相抵。第一斜面321a抵压于第一极耳部121，从而对第一极耳部121进行整形，并维持第一极耳部121的形貌。
在一些实施例中，第二隔离板322包括面向主体部11的第二斜面322a。在第一方向X上，第二斜面322a靠近通道31的一端与主体部11的端面111之间的最小距离大于第二斜面322a远离通道31的一端与主体部11的端面111之间的最小距离。在第一方向X上，第一极耳部121的另一部分位于第二斜面322a和主体部11的端面111之间。
通过设置第二斜面322a，可减小第二隔离板322与第一极耳部121之间的间隙，进而使第二隔离板322能够对第一极耳部121进行整形，并有助于维持第一极耳部121的形貌。
在一些实施例中，第二斜面322a与端面111之间的夹角为β，tanβ≥2h 0/W 0。可选地，tanβ＝2h 0/W 0。
在一些实施例中，第一斜面321a与端面111之间的夹角α等于第二斜面322a 与端面111之间的夹角β。
本实施例使α等于β，可以减小第一极耳部121最外两侧的极耳层12a弯折角度的差异，有助于改善第一极耳部121的形态。
在一些实施例中，第一隔离板321的最小厚度为d1，d1≥0.5mm。
第一隔离板321的最小厚度大于或等于0.5mm，以使第一隔离板321具有一定的强度，进而使第一隔离板321能够分隔第三极耳部123和主体部11，降低第一隔离板321变形的风险。
在一些实施例中，第二隔离板322的最小厚度为d2，d2≥0.5mm。
第二隔离板322的最小厚度大于或等于0.5mm，以使第二隔离板322具有一定的强度，进而使第二隔离板322能够分隔第三极耳部123和主体部11，降低第二隔离板322变形的风险。
在一些实施例中，第一隔离板321的远离通道31的端部的最小厚度大于第一隔离板321的靠近通道31的端部的最小厚度。
第一隔离板321的远离通道31的端部具有较大的厚度，以在第一隔离板321与第一极耳部121相互挤压时，降低第一隔离板321绕第一隔离板321的远离通道31的端部弯曲的风险。
在一些实施例中，第二隔离板322的至少部分位于第二段1232和主体部11的端面111之间。可选地，第二段1232的远离第一弯折段1233的自由端沿第一方向X的投影位于第二隔离板322沿第一方向X的投影内。
第二隔离板322可以将第二段1232的自由端与主体部11的端面111隔开，以降低第二段1232的自由端搭接到端面111的风险。
在一些实施例中，在第一方向X上，第一段1231与第二隔离板322不重叠。
图9为图6在方框B处的放大示意图。
如图9所示，在一些实施例中，第三极耳部123包括第一段1231、第二段1232和第一弯折段1233。第一段1231连接于第二极耳部。第二段1232位于第一段1231背离主体部11的一侧，并连接于电极引出件21。第一弯折段1233用于连接第一段1231和第二段1232，第一隔离板321的至少部分位于第一弯折段1233与主体部11之间。
极耳12包括多个极耳层。在第一弯折段1233，多个极耳层更为蓬松；当电池单体受到外部冲击时，第一弯折段1233容易插入主体部11。第一隔离板321将第一弯折段1233与主体部11绝缘隔离，以降低第一弯折段1233插入主体部11的风险，提高安全性。
在一些实施例中，第一隔离板321在背向主体部11的端面111一侧设有第三斜面321b。在垂直于端面111的第一方向X上，第三斜面321b靠近通道31的一端与电极引出件21之间的最小距离小于第三斜面321b远离通道31的一端与电极引出件21之间的最小距离。在第一方向X上，第一段1231的至少部分和第二段1232的至少部分位于第三斜面321b和电极引出件21之间。
在第一弯折段1233，多个极耳层更为蓬松，也就是说，第一弯折段1233在第一方向X上占用的空间更大。
本实施例通过设置第三斜面321b，以增大第一隔离板321的背离端面111的一侧的空间，进而为第一弯折段1233提供更多的空间，降低第一弯折段1233受压的风险。
在一些实施例中，极耳12包括多个极耳层，多个极耳层的总厚度为T 1。在第一方向X上，第三斜面321b靠近通道31的一端与电极引出件21之间的最小距离为H 1，H 1＞2T 1。
第一段1231和第二段1232大体沿第一方向X层叠，两者在第一方向X上占用的空间大体为2T 1；本申请实施例使H 1＞2T 1，以为第一段1231和第二段1232提供空间，减小第一段1231与第一隔离板321之间的压力，减少第一段1231与第一隔离板321之间的摩擦，降低第一段1231磨损、开裂的风险。
示例性地，电极引出件21具有面向端面111的连接面21a。H 1为第三斜面321b靠近通道31的一端与连接面21a沿第一方向X的最小间距。可选地，连接面21a平行于端面111。
在一些实施例中，在第一方向X上，第三斜面321b远离通道31的一端与电极引出件21之间的最小距离为H 2，H 2＞3T 1。
示例性地，H 2为：在第一方向X上，第三斜面321b远离通道31的一端与连接面21a所在的虚拟平面之间的最小间距。
本实施例使H 2＞3T 1，以为第一弯折段1233提供更多的空间，降低第一弯折段1233受压的风险。
在一些实施例中，第一弯折段1233沿第一方向X的投影位于第三斜面321b沿第一方向X的投影内。
在另一些实施例中，第一隔离板321在背向主体部11的端面111一侧设有第一平面321c，第一平面321c垂直于第一方向X并连接于第三斜面321b远离通道31的一端。在第一方向X上，第一平面321c的至少部分位于第一弯折段1233与主体部11之间。在第一方向X上，第一平面321c与电极引出件21之间的最小距离大于3T 1。
第一平面321c平行于端面111。
示例性地，第一平面321c与电极引出件21之间的最小距离等于H 2。
第一隔离板321的与第一平面321c对应的部分将第一弯折段1233与主体部11绝缘隔离，以降低第一弯折段1233插入主体部11的风险。第一平面321c与电极引出件21之间的最小距离大于3T 1，这样可在第一平面321c背离主体部11的一侧形成更多的空间，以降低第一弯折段1233与第一平面321c彼此挤压的风险。
在一些实施例中，第一隔离板321包括面向主体部11的第一斜面321a。在第一方向X上，第一斜面321a靠近通道31的一端与主体部11的端面111之间的最小距离大于第一斜面321a远离通道31的一端与主体部11的端面111之间的最小距离。在第一方向X上，第一极耳部121的一部分位于第一斜面321a和主体部11的端面111之间。在第一方向X上，第一隔离板321的位于第一斜面321a和第一平面321c之间的部分的最小厚度大于第一隔离板321的位于第一斜面321a和第三斜面321b之间的部分的最小厚度。
第一斜面321a可以对第一极耳部121整形，以降低第一极耳部121变形的风险。第一斜面321a和第二斜面322a的配合可以将第一隔离板321面向端面111一侧的空间利用到第一隔离板321背离端面111一侧的空间，使得第一隔离板321背离端面111一侧的供第三极耳部123折弯的空间最大化。通过设置第一平面321c，可使第一隔离板321的位于第一斜面321a和第一平面321c之间的部分具有较大的厚度，从而降低第一隔离板321绕第一隔离板321的远离通道31的端部弯曲的风险。
在一些实施例中，第三斜面321b平行于第一斜面321a。
图10为图6在方框C处的放大示意图；图11为本申请一些实施例提供的电池单体的隔离构件的立体结构示意图；图12为图11在圆框D处的放大示意图；图13为图12所示的第一卡接部和第二卡接部的局部剖视示意图。
如图9至图13所示，在一些实施例中，隔离构件30包括隔离板32，隔离板32设有通道31，且隔离板32的至少部分位于第三极耳部123和主体部11之间。
在一些实施例中，隔离构件30还包括连接板33，连接板33环绕在隔离板32的外侧，连接板33凸出于隔离板32的背离主体部11的一侧，以与隔离板32共同限定出容纳凹部34。第三极耳部123的至少部分容纳于容纳凹部34。
第三极耳部123可以整体容纳于容纳凹部34，也可以仅部分容纳于容纳凹部34。
连接板33可以提高隔离构件30的整体强度，还能够环绕第三极耳部123，以将第三极耳部123与外壳20的至少部分绝缘隔离，提高安全性。
在一些实施例中，电池单体6还包括容纳于外壳20内并连接于外壳20的绝缘构件40。连接板33的至少部分位于绝缘构件40和主体部11的端面111之间。
绝缘构件40和端面111可以从两侧对连接板33进行限位，以在电池单体6受到外部冲击时，降低隔离构件30晃动的幅度。
在一些实施例中，绝缘构件40的材质为塑胶。
在一些实施例中，绝缘构件40设置于端盖的内表面。
在一些实施例中，在垂直于端面111的第一方向X上，连接板33的至少部分夹持于绝缘构件40和主体部11的端面111之间。
绝缘构件40和主体部11的端面111从两侧夹持连接板33的至少部分，以在第一方向X上限制连接板33的移动，进而在电池单体6受到外部冲击时，降低隔离构件30沿第一方向X晃动的幅度，提高安全性。
在一些实施例中，绝缘构件40的至少部分容纳于容纳凹部34。
绝缘构件40的容纳于容纳凹部34的部分可以对隔离构件30进行限位，从而限制隔离构件30在垂直于第一方向X的方向上的移动。
在一些实施例中，连接板33的内表面33a设有台阶面33b，绝缘构件40容纳于容纳凹部34的部分抵压于台阶面33b。
连接板33的内表面33a为连接板33的用于限定容纳凹部34的表面。
台阶面33b可以为一个，也可以为多个。在一些示例中，台阶面33b为一个，台阶面33b沿连接板33的周向环绕一周。在另一些示例中，台阶面33b为多个，多个台阶面33b沿连接板33的周向间隔设置。
绝缘构件40抵压于台阶面33b，以限制隔离构件30在第一方向X上的移动。
在一些实施例中，台阶面33b平行于端面111。
在一些实施例中，连接板33的内表面33a还包括连接于台阶面33b的限位面33c，限位面33c环绕在绝缘构件40的外侧并与绝缘构件40贴合。
绝缘构件40容纳于容纳凹部34的部分与限位面33c贴合，以限制限位面33c的移动。
绝缘构件40与端面111夹持隔离构件30，以实现隔离构件30在第一方向X上的固定；绝缘构件40与连接板33的限位面33c贴合，以实现隔离构件30在垂直于第一方向X的方向上的固定。
在一些实施例中，绝缘构件40容纳于容纳凹部34的部分与连接板33卡接，进而实现隔离构件30的固定。在一些替代地实施例中，也可以将绝缘构件40容纳于容纳凹部34的部分与连接板33熔接。
在一些实施例中，隔离板32包括间隔设置的第一隔离板321和第二隔离板322，第一隔离板321和第二隔离板322之间形成通道31。连接板33包括第一连接板331和第二连接板332，第一连接板331和第一隔离板321一体形成，第二连接板332与第二隔离板322一体形成，第一连接板331与第二连接板332独立形成并彼此连接。
第一连接板331与第二连接板332可以通过卡接、熔接、粘接或其它方式连接。
本实施例的隔离构件30分体成型，可以使隔离构件30与电极组件10的装配方式更为灵活。
示例性地，隔离构件30包括两个子构件，一个子构件包括第一连接板331和第一隔离板321，另一个子构件包括第二连接板332和第二隔离板322。两个子构件独立形成。
在一些示例中，可以先组装出隔离构件30，再将极耳12从隔离构件30的通道31中穿过，然后再连接极耳12和电极引出件21。在另一些示例中，可以先连接极耳12和电极引出件21，然后再从极耳12的两侧安装两个子构件，以将组装出的隔离构件30安装在极耳12上。
在一些实施例中，第一连接板331卡接于第二连接板332。卡接可以简化第一连接板331和第二连接板332的装配工艺。
第一连接板331包括两个第一卡接部3311，两个第一卡接部3311分别设置于第一隔离板321相对两端。第二连接板332包括两个第二卡接部3321，两个第二卡接部3321分别设置于第二隔离板322相对两端。第一卡接部3311卡接于第二卡接部3321。
示例性地，第一卡接部3311设置于第一隔离板321沿第三方向Z的两端，第一方向X、第二方向Y和第三方向Z两两垂直。两个第二卡接部3321设置于第二隔离板322沿第三方向Z的两端。
两个第一卡接部3311和两个第二卡接部3321的配合能够实现第一连接板331和第二连接板332的固定，并进一步增强第一连接板331和第二连接板332连接的稳定性和可靠性。
在一些实施例中，至少一个第一卡接部3311设有凸起P1，至少一个第二卡接 部3321设有卡接孔P2，凸起P1的至少部分容纳于卡接孔P2，以将第一卡接部3311卡接于第二卡接部3321。
在一些示例中，一个第一卡接部3311设有凸起P1，另一个第一卡接部3311设有卡接孔P2；与设有凸起P1的第一卡接部3311配合第二卡接部3321设有卡接孔P2，与设有卡接孔P2的第一卡接部3311配合的第二卡接部3321设有凸起P1。在另一些示例中，两个第一卡接部3311均设有凸起P1，两个第二卡接部3321均设有卡接孔P2。
本实施例通过凸起P1和卡接孔P2的配合，以实现第一卡接部3311和第二卡接部3321的卡接。
在一些实施例中，一个第一卡接部3311设有凸起P1，另一个第一卡接部3311设有卡接孔P2；与设有凸起P1的第一卡接部3311配合第二卡接部3321设有卡接孔P2，与设有卡接孔P2的第一卡接部3311配合的第二卡接部3321设有凸起P1。
本实施例可以使隔离构件30的两个子构件采用相同的结构，提高互换性。
在一些实施例中，凸起P1由柔性材质制成。
在一些实施例中，凸起P1包括两个间隔的子凸起P11，各子凸起P11设有凸缘，子凸起P11穿过卡接孔P2后，凸缘卡在第二卡接部3321上。
图14为本申请另一些实施例提供的电池单体的隔离构件的立体结构示意图。
如图14所示，隔离构件30为一体成型结构。将隔离构件30设置为一体成型，可以使隔离构件30具有较高的整体强度，并可省去隔离构件30的组装工艺。
图15为本申请另一些实施例提供的电池单体的局部剖视示意图。
如图15所示，在一些实施例中，极耳12包括层叠设置的多个极耳层，多个极耳层向着主体部11的端面111的侧部区域收拢，通道31位于隔离构件30的侧部区域。
示例性地，端面111的侧部区域是指端面111的靠近端面111沿第二方向Y的边缘的区域。可选地，端面111的侧部区域在第二方向Y上的尺寸与端面111在第二方向Y上的总尺寸之比为10％-30％。
示例性地，隔离构件30的侧部区域是指隔离构件30的靠近隔离构件30沿第二方向Y的边缘的区域。可选地，隔离构件30的侧部区域在第二方向Y上的尺寸与隔离构件30在第二方向Y上的总尺寸之比为10％-30％。
将多个极耳层向着主体部11的端面111的侧部区域收拢，可以减少极耳层弯折的次数。将通道31设于隔离构件30的侧部区域，可以减小通道31与多个极耳层的收拢部分之间的距离，便于多个极耳层从通道31中穿过。
如图4所示，多个极耳层向着主体部11的端面111的中部区域收拢时，如果极耳层穿过通道31的部分直接向一侧弯折，将会造成极耳层与电极引出件21之间的连接面积较小，影响过流。因此，图4所示的极耳层穿过通道31的部分经过了两次弯折，以保证极耳层与电极引出件21之间的连接面积。在图15所示的电池单体6中，多个极耳层向着主体部11的端面111的侧部区域收拢，那么极耳层穿过通道31的部分直接向一侧弯折，即可保证极耳层与电极引出件21之间的连接面积。因此，将多个极耳层向着主体部11的端面111的侧部区域收拢，可以减少极耳层弯折的次数。
图16为本申请又一些实施例提供的电池单体的局部剖视示意图；图17为本申 请又一些实施例提供的电池单体的转接件的结构示意图。图17示出了转接件在折弯前的状态。
如图16和图17所示，在一些实施例中，电池单体6还包括转接件50。转接件50包括极耳连接部51、电极连接部52和第二弯折段53。极耳连接部51连接于第三极耳部123；电极连接部52位于极耳连接部51背离主体部11的一侧，并连接于电极引出件21；第二弯折段53用于连接极耳连接部51和电极连接部52。
极耳连接部51可以是一个或多个，本实施例对此不作限制。
第二弯折段53相对于极耳连接部51弯折、相对于电极连接部52弯折。
极耳连接部51可平行于电极连接部52。可替代地，极耳连接部51与电极连接部52之间也可形成大于0°的夹角。
电极连接部52可通过焊接、粘接、铆接、卡接或其它方式连接于电极引出件21，极耳连接部51可通过焊接、粘接、铆接、卡接或其它方式连接于第三极耳部123。
本实施例通过设置转接件50来连接第三极耳部123和电极引出件21，这样可以减小对第三极耳部123的尺寸的要求，并降低装配难度。
在一些实施例中，极耳连接部51为多个。多个极耳连接部51与多个极耳层层叠设置并连接。
可选地，任意相邻的两个极耳连接部51之间设有至少一个极耳层。
多个极耳连接部51和多个极耳层层叠，可以增大转接件50与极耳12的接触面积，提高转接件50与极耳12之间的连接强度，降低极耳层撕裂的风险，提高安全性。
在一些实施例中，第二弯折段53为多个，多个第二弯折段53与多个极耳连接部51一一对应设置。
在一些实施例中，极耳连接部51、电极连接部52以及第三极耳部123均平行于主体部11的端面111。
平行指的是大体平行，并不要求绝对的平行。示例性地，极耳连接部51与端面111的夹角小于10°，则可认为极耳连接部51平行于端面111；电极连接部52与端面111的夹角小于10°，则可认为电极连接部52平行于端面111；第三极耳部123与端面111的夹角小于10°，则可认为第三极耳部123平行于端面111。
本实施例可以减小转接件50和第三极耳部123在垂直于端面111的方向上占用的空间，提高电池单体6的能量密度。
在一些实施例中，第二弯折段53设置有薄弱结构531。通过设置薄弱结构531，以引导转接件50在设定的区域折弯。
在一些实施例中，可通过在转接件50上开设通孔532、凹槽、刻痕等结构来降低转接件50局部区域的强度，进而在第二弯折段53形成薄弱结构531。
在一些实施例中，转接件50设置有第二熔接区51a和第三熔接区52a，第二熔接区51a仅设置在极耳连接部51并用于与第三极耳部123相连，第三熔接区52a仅设置在电极连接部52并用于与电极引出件21相连。
示例性地，极耳连接部51通过焊接与第三极耳部123相连，焊接后，极耳连接部51形成第二熔接区51a。电极连接部52通过焊接与与电极引出件21相连，焊接后， 电极连接部52形成第三熔接区52a。
在弯折转接件50的过程中，使第二熔接区51a仅设置在极耳连接部51、第三熔接区52a仅设置在电极连接部52，进而使第二熔接区51a和第三熔接区52a避开转接件50的折弯位置，从而降低第二熔接区51a和第三熔接区52a开裂的风险。
根据本申请的一些实施例，本申请还提供了一种电池，包括多个以上任一实施例的电池单体。
根据本申请的一些实施例，本申请还提供了一种用电装置，包括以上任一实施例的电池单体，电池单体用于为用电装置提供电能。用电装置可以是前述任一应用电池单体的设备或系统。
根据本申请的一些实施例，参照图3至图8，本申请提供了一种电池单体6，其包括外壳20、电极组件10以及隔离构件30。电极组件10容纳于外壳20内。
外壳20包括壳体23、端盖22和电极引出件21，壳体23具有开口，端盖22盖合于开口以形成用于容纳电极组件10的容纳腔。电极引出件21设置于端盖22。
电极组件10包括主体部11和从主体部11的端面111引出的极耳12。
隔离构件30包括隔离板32和连接板33，连接板33环绕在隔离板32的外侧，连接板33凸出于隔离板32的背离主体部11的一侧，以与隔离板32共同限定出容纳凹部34。隔离板32包括间隔设置的第一隔离板321和第二隔离板322，第一隔离板321和第二隔离板322之间形成通道31。
极耳12包括第一极耳部121、第二极耳部122和第三极耳部123。第一极耳部121连接于主体部11，第一极耳部121的一部分位于第一隔离板321和端面111之间，第一极耳部121的另一部分位于第二隔离板322和端面111之间。第二极耳部122连接于第一极耳部121的背离主体部11的一端，第二极耳部122容纳于通道31内。第三极耳部123包括第一段1231、第二段1232和第一弯折段1233。第一段1231连接于第二极耳部122，第一隔离板321至少部分位于第一段1231与主体部11之间。第二段1232位于第一段1231背离主体部11的一侧，并连接于电极引出件21。第一弯折段1233用于连接第一段1231和第二段1232。第一段1231和第二段1232均大体平行于端面111。
极耳12包括多个极耳层，多个极耳层在通道31内的部分层叠设置。通道31沿自身宽度方向的尺寸为W 1，多个极耳层的总厚度为T 1，W 1和T 1满足：0.5mm≤W 1-T 1≤4mm。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换，但这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims (43)

  1. 一种电池单体，包括：
    外壳，设有电极引出件；
    电极组件，容纳于所述外壳内，所述电极组件包括主体部和从所述主体部的端面引出的极耳；以及
    隔离构件，至少部分设置于所述电极引出件和所述主体部的端面之间，所述隔离构件设有通道，所述极耳穿过所述通道并与所述电极引出件电连接。
  2. 根据权利要求1所述的电池单体，其中，所述极耳包括多个极耳层，所述多个极耳层在所述通道内的部分层叠设置；
    所述通道沿自身宽度方向的尺寸为W 1，所述多个极耳层的总厚度为T 1，W 1和T 1满足：0.5mm≤W 1-T 1≤4mm。
  3. 根据权利要求2所述的电池单体，其中，W 1和T 1满足：1mm≤W 1-T 1≤3mm。
  4. 根据权利要求2或3所述的电池单体，其中，所述通道的轴向与所述主体部的端面垂直。
  5. 根据权利要求1-4任一项所述的电池单体，其中，所述极耳包括：
    第一极耳部，连接于所述主体部，所述第一极耳部的至少部分位于所述隔离构件和所述主体部之间；
    第二极耳部，连接于所述第一极耳部的背离所述主体部的一端，所述第二极耳部容纳于所述通道内；以及
    第三极耳部，连接于所述第二极耳部的背离所述第一极耳部的一端，并用于连接所述电极引出件，所述隔离构件的至少部分位于所述第三极耳部与所述主体部之间。
  6. 根据权利要求5所述的电池单体，其中，所述第三极耳部包括：
    第一段，连接于所述第二极耳部，所述隔离构件的至少部分位于所述第一段与所述主体部之间；
    第二段，所述第二段位于所述第一段背离所述主体部的一侧，并连接于所述电极引出件；
    第一弯折段，用于连接所述第一段和所述第二段。
  7. 根据权利要求6所述的电池单体，其中，所述第二段平行于所述主体部的端面。
  8. 根据权利要求6或7所述的电池单体，其中，所述第三极耳部设置有第一熔接区，所述第一熔接区仅位于所述第二段上，所述第一熔接区的至少部分连接于所述电极引出件。
  9. 根据权利要求5所述的电池单体，还包括转接件，所述转接件包括：
    极耳连接部，连接于所述第三极耳部；
    电极连接部，位于所述极耳连接部背离所述主体部的一侧，并连接于所述电极引出件；
    第二弯折段，用于连接所述极耳连接部和所述电极连接部。
  10. 根据权利要求9所述的电池单体，其中，所述极耳连接部、所述电极连接部以及所述第三极耳部均平行于所述主体部的端面。
  11. 根据权利要求9或10所述的电池单体，其中，所述第二弯折段设置有薄弱结构。
  12. 根据权利要求9-11任一项所述的电池单体，其中，所述转接件设置有第二熔接区和第三熔接区，所述第二熔接区仅设置在所述极耳连接部并用于与所述第三极耳部相连，所述第三熔接区仅设置在所述电极连接部并用于与所述电极引出件相连。
  13. 根据权利要求5-12任一项所述的电池单体，其中，所述隔离构件包括隔离板，隔离板设有所述通道，且所述隔离板的至少部分位于所述第三极耳部和所述主体部之间。
  14. 根据权利要求13所述的电池单体，其中，所述隔离构件还包括连接板，所述连接板环绕在所述隔离板的外侧，所述连接板凸出于所述隔离板的背离所述主体部的一侧，以与所述隔离板共同限定出容纳凹部；
    所述第三极耳部的至少部分容纳于所述容纳凹部。
  15. 根据权利要求14所述的电池单体，还包括容纳于所述外壳内并连接于所述外壳的绝缘构件；
    所述连接板的至少部分位于所述绝缘构件和所述主体部的端面之间。
  16. 根据权利要求15所述的电池单体，其中，在垂直于所述端面的第一方向上，所述连接板的至少部分夹持于所述绝缘构件和所述主体部的端面之间。
  17. 根据权利要求15或16所述的电池单体，其中，所述绝缘构件的至少部分容纳于所述容纳凹部。
  18. 根据权利要求17所述的电池单体，其中，所述连接板的内表面设有台阶面，所述绝缘构件容纳于所述容纳凹部的部分抵压于所述台阶面。
  19. 根据权利要求18所述的电池单体，其中，所述连接板的内表面还包括连接于台阶面的限位面，所述限位面环绕在所述绝缘构件的外侧并与所述绝缘构件贴合。
  20. 根据权利要求14-19任一项所述的电池单体，其中，所述隔离构件为一体成型结构。
  21. 根据权利要求14-19任一项所述的电池单体，其中，
    所述隔离板包括间隔设置的第一隔离板和第二隔离板，所述第一隔离板和所述第二隔离板之间形成所述通道；
    所述连接板包括第一连接板和第二连接板，所述第一连接板和所述第一隔离板一体形成，所述第二连接板与所述第二隔离板一体形成，所述第一连接板与所述第二连接板独立形成并彼此连接。
  22. 根据权利要求21所述的电池单体，其中，所述第一连接板卡接于所述第二连接板。
  23. 根据权利要求22所述的电池单体，其中，所述第一连接板包括两个第一卡接部，两个所述第一卡接部分别设置于所述第一隔离板相对两端；
    所述第二连接板包括两个第二卡接部，两个所述第二卡接部分别设置于所述第二 隔离板相对两端；
    所述第一卡接部卡接于所述第二卡接部。
  24. 根据权利要求23所述的电池单体，其中，至少一个所述第一卡接部设有凸起，至少一个所述第二卡接部设有卡接孔，所述凸起的至少部分容纳于所述卡接孔，以将所述第一卡接部卡接于所述第二卡接部。
  25. 根据权利要求13-24任一项所述的电池单体，其中，所述隔离板包括间隔设置的第一隔离板和第二隔离板，所述第一隔离板和所述第二隔离板之间形成所述通道；
    所述第一极耳部的一部分位于所述第一隔离板和所述主体部之间，所述第一极耳部的另一部分位于所述第二隔离板和所述主体部之间。
  26. 根据权利要求25所述的电池单体，其中，
    所述第一隔离板包括面向所述主体部的第一斜面；在垂直于所述端面的第一方向上，所述第一斜面靠近所述通道的一端与所述主体部的端面之间的最小距离大于所述第一斜面远离所述通道的一端与所述主体部的端面之间的最小距离；
    在所述第一方向上，所述第一极耳部的一部分位于所述第一斜面和所述主体部的端面之间。
  27. 根据权利要求26所述的电池单体，其中，
    所述第一斜面与所述端面之间的夹角为α，所述第一极耳部沿所述第一方向的尺寸为h 0，所述第一极耳部沿第二方向的尺寸为W 0，所述第二方向为所述第一极耳部的多个极耳层的层叠方向且垂直于所述第一方向；
    α、h 0以及W 0满足：tanα≥2h 0/W 0。
  28. 根据权利要求27所述的电池单体，其中，α、h 0以及W 0满足：tanα＝2h 0/W 0。
  29. 根据权利要求26-28任一项所述的电池单体，其中，所述第一斜面与所述第一极耳部相抵。
  30. 根据权利要求26-29任一项所述的电池单体，其中，所述第二隔离板包括面向所述主体部的第二斜面；
    在所述第一方向上，所述第二斜面靠近所述通道的一端与所述主体部的端面之间的最小距离大于所述第二斜面远离所述通道的一端与所述主体部的端面之间的最小距离；
    在所述第一方向上，所述第一极耳部的另一部分位于所述第二斜面和所述主体部的端面之间。
  31. 根据权利要求30所述的电池单体，其中，所述第一斜面与所述端面之间的夹角等于所述第二斜面与所述端面之间的夹角。
  32. 根据权利要求25-31任一项所述的电池单体，其中，
    所述第一隔离板的最小厚度为d1，d1≥0.5mm；和/或
    所述第二隔离板的最小厚度为d2，d2≥0.5mm。
  33. 根据权利要求25-32任一项所述的电池单体，其中，
    所述第一隔离板的远离所述通道的端部的最小厚度大于所述第一隔离板的靠近所述通道的端部的最小厚度。
  34. 根据权利要求25-33任一项所述的电池单体，其中，所述第三极耳部包括：
    第一段，连接于所述第二极耳部；
    第二段，位于所述第一段背离所述主体部的一侧，并连接于所述电极引出件；
    第一弯折段，用于连接所述第一段和所述第二段，所述第一隔离板的至少部分位于所述第一弯折段与所述主体部之间。
  35. 根据权利要求34所述的电池单体，其中，所述第一隔离板在背向所述主体部的端面一侧设有第三斜面；
    在垂直于所述端面的所述第一方向上，所述第三斜面靠近所述通道的一端与所述电极引出件之间的最小距离小于第三斜面远离所述通道的一端与所述电极引出件之间的最小距离；
    在所述第一方向上，所述第一段的至少部分和所述第二段的至少部分位于所述第三斜面和所述电极引出件之间。
  36. 根据权利要求35所述的电池单体，其中，所述极耳包括多个极耳层，所述多个极耳层的总厚度为T 1；
    在所述第一方向上，所述第三斜面靠近所述通道的一端与所述电极引出件之间的最小距离为H 1，H 1＞2T 1。
  37. 根据权利要求36所述的电池单体，其中，在所述第一方向上，所述第三斜面远离所述通道的一端与所述电极引出件之间的最小距离为H 2，H 2＞3T 1。
  38. 根据权利要求36或37所述的电池单体，其中，所述第一隔离板在背向所述主体部的端面一侧设有第一平面，所述第一平面垂直于所述第一方向并连接于所述第三斜面远离所述通道的一端；
    在所述第一方向上，所述第一平面的至少部分位于所述第一弯折段与所述主体部之间；
    在所述第一方向上，所述第一平面与所述电极引出件之间的最小距离大于3T 1。
  39. 根据权利要求38所述的电池单体，其中，所述第一隔离板包括面向所述主体部的第一斜面；
    在所述第一方向上，所述第一斜面靠近所述通道的一端与所述主体部的端面之间的最小距离大于第一斜面远离所述通道的一端与所述主体部的端面之间的最小距离；在所述第一方向上，所述第一极耳部的一部分位于所述第一斜面和所述主体部的端面之间；
    在所述第一方向上，所述第一隔离板的位于所述第一斜面和所述第一平面之间的部分的最小厚度大于所述第一隔离板的位于所述第一斜面和所述第三斜面之间的部分的最小厚度。
  40. 根据权利要求1-39任一项所述的电池单体，其中，所述极耳包括层叠设置的多个极耳层，所述多个极耳层向着所述主体部的端面的中部区域收拢，所述通道位于所述隔离构件的中部区域。
  41. 根据权利要求1-39任一项所述的电池单体，其中，所述极耳包括层叠设置的多个极耳层，所述多个极耳层向着所述主体部的端面的侧部区域收拢，所述通道位于 所述隔离构件的侧部区域。
  42. 一种电池，包括多个如权利要求1-41任一项所述的电池单体。
  43. 一种用电装置，包括如权利要求1-41任一项所述的电池单体，所述电池单体用于提供电能。
PCT/CN2022/099581 2022-06-17 2022-06-17 电池单体、电池以及用电装置 Ceased WO2023240633A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP22946314.6A EP4421975A4 (en) 2022-06-17 2022-06-17 BATTERY COMPONENT, BATTERY AND ELECTRICAL DEVICE
PCT/CN2022/099581 WO2023240633A1 (zh) 2022-06-17 2022-06-17 电池单体、电池以及用电装置
CN202280058613.3A CN117941163A (zh) 2022-06-17 2022-06-17 电池单体、电池以及用电装置
US18/671,974 US20240322404A1 (en) 2022-06-17 2024-05-22 Battery cell, battery, and electric apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/099581 WO2023240633A1 (zh) 2022-06-17 2022-06-17 电池单体、电池以及用电装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/671,974 Continuation US20240322404A1 (en) 2022-06-17 2024-05-22 Battery cell, battery, and electric apparatus

Publications (1)

Publication Number Publication Date
WO2023240633A1 true WO2023240633A1 (zh) 2023-12-21

Family

ID=89192963

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/099581 Ceased WO2023240633A1 (zh) 2022-06-17 2022-06-17 电池单体、电池以及用电装置

Country Status (4)

Country Link
US (1) US20240322404A1 (zh)
EP (1) EP4421975A4 (zh)
CN (1) CN117941163A (zh)
WO (1) WO2023240633A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025245889A1 (zh) * 2024-05-31 2025-12-04 宁德时代新能源科技股份有限公司 电池单体及其装配方法、电池、用电装置
WO2025245894A1 (zh) * 2024-05-31 2025-12-04 宁德时代新能源科技股份有限公司 电池单体及其加工方法、电池和用电装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017157576A (ja) * 2017-06-19 2017-09-07 トヨタ自動車株式会社 二次電池
CN112310517A (zh) * 2019-10-15 2021-02-02 宁德时代新能源科技股份有限公司 二次电池、电池模块、电池组、装置及制造方法
CN215989141U (zh) * 2021-05-27 2022-03-08 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置
CN216750230U (zh) * 2022-01-07 2022-06-14 宁德时代新能源科技股份有限公司 一种电池单体、电池及用电装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108428921A (zh) * 2018-02-01 2018-08-21 宁德时代新能源科技股份有限公司 二次电池
CN215451570U (zh) * 2021-04-02 2022-01-07 欣旺达电动汽车电池有限公司 单体电池和电池模组

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017157576A (ja) * 2017-06-19 2017-09-07 トヨタ自動車株式会社 二次電池
CN112310517A (zh) * 2019-10-15 2021-02-02 宁德时代新能源科技股份有限公司 二次电池、电池模块、电池组、装置及制造方法
CN215989141U (zh) * 2021-05-27 2022-03-08 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置
CN216750230U (zh) * 2022-01-07 2022-06-14 宁德时代新能源科技股份有限公司 一种电池单体、电池及用电装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4421975A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025245889A1 (zh) * 2024-05-31 2025-12-04 宁德时代新能源科技股份有限公司 电池单体及其装配方法、电池、用电装置
WO2025245894A1 (zh) * 2024-05-31 2025-12-04 宁德时代新能源科技股份有限公司 电池单体及其加工方法、电池和用电装置

Also Published As

Publication number Publication date
CN117941163A (zh) 2024-04-26
US20240322404A1 (en) 2024-09-26
EP4421975A4 (en) 2025-11-05
EP4421975A1 (en) 2024-08-28

Similar Documents

Publication Publication Date Title
CN115917829B (zh) 电池单体、电池、用电设备及电池单体的制造设备
CN219937323U (zh) 电池单体、电池及用电装置
CN218242193U (zh) 电池单体、电池以及用电装置
CN216389437U (zh) 集流构件、电池单体、电池及用电设备
WO2023025104A1 (zh) 电池单体、电池以及用电装置
CN219123419U (zh) 电池单体、电池以及用电装置
CN218498208U (zh) 电池单体、电池以及用电装置
US20250349992A1 (en) Battery cell, battery, and electric apparatus
CN220774523U (zh) 电池单体、电池及用电设备
CN216250906U (zh) 电池单体、电池和用电设备
CN218997009U (zh) 电池单体、电池以及用电装置
WO2024045058A1 (zh) 电池单体、电池及用电设备
US20240322404A1 (en) Battery cell, battery, and electric apparatus
CN217485645U (zh) 端盖组件、电池单体、电池和用电设备
WO2022188132A1 (zh) 电池单体及其制造方法和制造系统、电池以及用电设备
US12476307B2 (en) Battery cell comprising protective member for preventing short circuit, battery comprising the battery cell, and electric apparatus comprising the battery
WO2024164308A1 (zh) 电极组件、电池单体、电池及用电装置
US20240429504A1 (en) Battery cell and manufacturing method therefor and battery
WO2023245430A1 (zh) 电池单体、电池及用电设备
CN117461193A (zh) 端盖组件、电池单体及其制备方法、电池和用电装置
WO2025107319A1 (zh) 壳体、电池单体、电池及用电装置
WO2023130387A1 (zh) 电池、用电装置及电池的制造方法
CN219944943U (zh) 焊接压嘴结构和焊接设备
CN219843111U (zh) 电池模块、电池和用电装置
CN220672722U (zh) 电池单体、电池和用电装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22946314

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202280058613.3

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2022946314

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2022946314

Country of ref document: EP

Effective date: 20240521

NENP Non-entry into the national phase

Ref country code: DE