WO2023173652A1 - 电池组件及制备方法、电池和电动交通工具 - Google Patents

电池组件及制备方法、电池和电动交通工具 Download PDF

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Publication number
WO2023173652A1
WO2023173652A1 PCT/CN2022/109818 CN2022109818W WO2023173652A1 WO 2023173652 A1 WO2023173652 A1 WO 2023173652A1 CN 2022109818 W CN2022109818 W CN 2022109818W WO 2023173652 A1 WO2023173652 A1 WO 2023173652A1
Authority
WO
WIPO (PCT)
Prior art keywords
pole
battery
cover
battery assembly
cover plate
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/CN2022/109818
Other languages
English (en)
French (fr)
Inventor
邓国友
靳勇
慎晓杰
姚煜
殷晓丰
吴扬
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.)
Microvast Power Systems Huzhou Co Ltd
Microvast Holdings Inc
Original Assignee
Microvast Power Systems Huzhou Co Ltd
Microvast Inc
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 Microvast Power Systems Huzhou Co Ltd, Microvast Inc filed Critical Microvast Power Systems Huzhou Co Ltd
Priority to CN202290000876.4U priority Critical patent/CN223245865U/zh
Publication of WO2023173652A1 publication Critical patent/WO2023173652A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 in particular, to a battery component and its preparation method, batteries and electric vehicles.
  • Lithium-ion batteries have been widely used due to their advantages such as high specific power, long cycle life, good safety performance and no pollution.
  • Lithium-ion batteries can be divided into cylindrical batteries, square case batteries and soft pack batteries according to their appearance. Among them, cylindrical batteries have received more and more attention, and their applications are becoming more and more widespread.
  • Existing cylindrical batteries generally include a casing, a cover, a battery core, etc.
  • the positive connection terminal and the negative connection terminal of the existing cylindrical battery are respectively provided at the opposite ends of the cylindrical battery, which places certain restrictions on the battery grouping technology. , affecting the battery arrangement and battery energy density (since the positive connection terminal and the negative connection terminal are respectively set at the opposite ends of the cylindrical battery, when the batteries are connected in series and parallel to form a group, the batteries must first be placed according to the requirements of the corresponding polarity, not only This increases the risk of incorrect battery placement, increases the number of structural components, complicates wiring design, increases production costs, and reduces battery energy density).
  • the existing cylindrical battery has a long electrical connection path between the current collecting plate and the pole, and a small contact area, resulting in poor thermal conductivity. Therefore, existing cylindrical batteries still need to be structurally improved to solve problems such as the complexity of battery group arrangement and production cost, while also improving the heat dissipation performance and sealing performance of the battery.
  • the purpose of this application is to provide a battery assembly and battery, aiming to solve or at least partially solve the shortcomings of the above-mentioned background technology.
  • the pole and the cover are fixed by riveting. Compared with the welding fixation method, it not only simplifies the fixation operation, but also simplifies the fixation operation. Improved production efficiency and reduced production costs.
  • An embodiment of the present application provides a battery assembly, including a cover plate and a pole.
  • the pole penetrates the cover plate and is fixed with the cover plate by riveting.
  • the cover plate is provided with a through hole
  • the pole includes a main body and a first end and a second end respectively located at opposite ends of the main body, and the main body is disposed on In the through hole, the first end and the second end extend and protrude from the main body in opposite directions toward the outside of the through hole, and the cover plate, the first end and the second end protrude from the main body in opposite directions.
  • the three second ends are riveted; the part of the cover plate participating in the riveting is located between the first end and the second end.
  • the first end of the pole is provided with a stopper, and the second end of the pole is formed with a flange.
  • the stopper, the flange and the cover plate form a Riveting; the part of the cover plate that participates in riveting is located between the stopper and the flange.
  • the battery assembly further includes a pressing block, and the pressing block participates in riveting, that is, the pressing block, the pole and the cover are riveted, and the pressing block is arranged on The first end and/or the second end of the pole.
  • the pressure block has an annular structure, and the pressure block is sleeved on the first end and/or the second end of the pole.
  • a flange is formed on the first end or the second end of the pole, and the pressing block is disposed on the pole close to the flange, and the pressing block is located on the pole.
  • the first end or the second end of the pole has a stopper, and the pressure block is disposed on the pole close to the stopper. , the pressure block is located between the stopper and the cover plate.
  • the battery assembly further includes an insulating sealing ring, the insulating sealing ring is sleeved on the pole, and the insulating sealing ring is used between the pole and the cover plate. of insulation and sealing.
  • the battery assembly further includes a first current collecting plate, and the first current collecting plate is electrically connected to the pole.
  • the first current collecting plate includes a plate body and an electrical connection portion, the electrical connection portion is formed by the plate body extending and protruding toward the pole, and the electrical connection portion is connected to The poles are electrically connected.
  • the pole is provided with a central hole, the electrical connection part is inserted into the central hole, and the electrical connection part is electrically connected to the pole.
  • the side wall of the electrical connection part is in contact with the inner wall of the central hole to realize the electrical connection between the electrical connection part and the pole.
  • the battery assembly further includes a sealing piece, the sealing piece is sealingly connected to the pole, and the sealing piece seals the central hole on the pole.
  • the pole is a positive pole or a negative pole.
  • Another embodiment of the present application also provides a battery, including the above-mentioned battery assembly.
  • the battery further includes a casing, at least one end of the casing is provided with an opening, and the cover plate is used to seal the opening of the casing; opposite ends of the pole respectively located outside the opening of the housing and within the opening of the housing.
  • the battery further includes a first current collecting plate, a second current collecting plate and a battery core.
  • the first current collecting plate, the second current collecting plate and the battery core are all Disposed in the housing, both sides of the first current collecting plate are electrically connected to the top of the battery core and the pole respectively, and both sides of the second current collecting plate are respectively connected to the top of the battery core.
  • the bottom end is electrically connected to the housing.
  • both sides of the first current collecting plate are respectively in contact with the top end of the battery core and the pole to achieve electrical connection
  • both sides of the second current collecting plate are respectively in contact with the top of the battery core and the pole. It is in contact with the bottom end of the battery core and the housing to achieve electrical connection.
  • the first current collecting plate can be a positive electrode current collecting plate or a negative electrode current collecting plate; the second current collecting plate can also be a positive electrode current collecting plate or a negative electrode current collecting plate.
  • the first current collecting plate is a positive electrode current collecting plate
  • the second current collecting plate is a negative electrode current collecting plate; on the contrary, when the first current collecting plate is a negative electrode current collecting plate, the second current collecting plate The plate is the positive current collecting plate.
  • Another embodiment of the present application also provides an electric vehicle, including the above-mentioned battery.
  • Another embodiment of the present application also provides a method for manufacturing a battery component, the preparation method including:
  • the pole and the cover are fixed by riveting.
  • the cover plate is provided with a through hole
  • the pole has a first end and a second end arranged oppositely, and the first end of the pole is provided with a stopper;
  • the above-mentioned penetrating the pole through the cover plate includes: inserting the pole into the through hole of the cover until the second end of the pole penetrates the cover;
  • the above-mentioned fixing of the pole and the cover plate by riveting includes: mechanically pressurizing the second end of the pole to form a flange, so that the pole and the cover plate are fixed by riveting, so The stopper part cooperates with the flange to press the cover plate tightly.
  • the poles and the cover are fixed by riveting. Compared with the welding fixation method, it not only simplifies the fixing operation, improves production efficiency, but also reduces production costs.
  • Figure 1 is a schematic cross-sectional view of the battery assembly in the first embodiment of the present application.
  • Figure 2 is a schematic cross-sectional view of the cover plate in Figure 1.
  • Figure 3 is a schematic cross-sectional view of the pole in Figure 1.
  • FIG. 4 is a schematic three-dimensional structural diagram of the first collecting plate in FIG. 1 .
  • Figure 5 is a schematic cross-sectional view of the battery assembly in the second embodiment of the present application.
  • Figure 6 is a schematic cross-sectional view of the battery assembly in the third embodiment of the present application.
  • Figure 7 is a schematic cross-sectional view of the battery assembly in the fourth embodiment of the present application.
  • Figure 8 is a schematic cross-sectional view of the battery assembly in the fifth embodiment of the present application.
  • Figure 9 is a schematic cross-sectional view of the battery assembly in the sixth embodiment of the present application.
  • Figure 10 is a schematic cross-sectional view of the battery assembly in the seventh embodiment of the present application.
  • Figure 11 is a schematic cross-sectional view of the battery assembly in the eighth embodiment of the present application.
  • the battery assembly provided by the first embodiment of the present application includes a cover plate 2 and a pole 3.
  • the pole 3 penetrates the cover 2 and is fixed to the cover 2 by riveting.
  • the pole post 3 and the cover plate 2 are fixed by riveting. Compared with the welding fixation method, it not only simplifies the operation, improves the production efficiency, but also reduces the production cost.
  • the cover 2 is provided with a through hole 21, and the pole 3 includes a main body 30A and a first end 30B and a second end 30C respectively located at opposite ends of the main body 30A.
  • the main body 30A is inserted into the through hole 21, and the first end 30B and the second end 30C are respectively extended and protruded from the main body 30A in opposite directions toward the outside of the through hole 21 (in this embodiment, the first end 30B is protruded from the main body 30A).
  • the cover plate 2, the first end 30B and the second end 30C are riveted, and the part of the cover plate 2 participating in the riveting is located at the first end. 30B and the second end 30C.
  • the battery assembly also includes a pressure block 4.
  • the pressure block 4 participates in riveting, that is, the pressure block 4, the pole 3 and the cover 2 are riveted.
  • the pressure block 4 is arranged on the pole 3. the first end 30B and/or the second end 30C. During riveting, the pole 3 and the pressure block 4 are fitted together.
  • the pressing block 4 may be an aluminum block.
  • the pressing block 4 can also be made of other materials.
  • the pressing block 4 is disposed on the second end 30C of the pole 3 (that is, the pressing block 4 is filled in the lower end of the pole 3 ).
  • the pressing block 4 can also be disposed on the first end 30B of the pole 3 , or on both the first end 30B and the second end 30C of the pole 3 .
  • the pressure block 4 has an annular structure, and the pressure block 4 is sleeved on the second end 30C of the pole 3 .
  • the pressing block 4 can also be sleeved on the first end 30B of the pole 3 , or simultaneously sleeved on the first end 30B and the second end 30C of the pole 3 .
  • the pole 3 has a T-shaped structure.
  • the first end 30B of the pole 3 is provided with a stopper 31.
  • the stopper 31 extends from the side wall of the pole 3 in a radial direction.
  • the outer protrusion is formed, and the stopper 31 is located on one side of the cover plate 2;
  • the second end 30C of the pole 3 is formed with a flange 32, and the flange 32 is formed by the side wall of the pole 3 protruding outward in the radial direction.
  • the flange 32 is located on the other side of the cover 2 .
  • the diameter of the stop 31 is larger than the diameter of the flange 32 .
  • the stopper 31 and the flange 32 are riveted with the cover plate 2 , and the part of the cover 2 participating in the riveting is located between the stopper 31 and the flange 32 .
  • the second end 30C of the pole 3 may be provided with a stopper 31
  • the first end 30B of the pole 3 may be formed with a flange 32 .
  • the stopper 31 is provided on the top of the pole 3 , the stopper 31 is located above the cover 2 , and the stopper 31 is located outside the housing 1 ; the flange 32 is provided on the pole 3 At the bottom of the housing, the flange 32 is located under the cover 2 , and the flange 32 is located inside the housing 1 .
  • the pressing block 4 is sleeved on the pole 3 at a position close to the flange 32 , and the pressing block 4 is located between the flange 32 and the cover plate 2 .
  • the pressing block 4 is fitted with the flange 32 .
  • the pressure block 4 can also be sleeved on the pole 3 at a position close to the stopper 31 , in which case the pressure block 4 is located between the stopper 31 and the cover plate 2 .
  • the stopper 31 is a structure of the pole 3 itself (that is, the stopper 31 exists before the pole 3 and the cover plate 2 are riveted), and the flange 32 is It is formed when the pole 3 and the cover plate 2 are riveted (that is, there is no flange 32 before the pole 3 and the cover plate 2 are riveted).
  • the T-shaped pole 3 is first inserted into the through hole 21 on the cover 2 from top to bottom.
  • the pole will be 3 forms an upsetting effect (that is, the length of the pole 3 is shortened and the diameter is increased), so that the pole 3 and the cover plate 2 are fixed, thereby realizing the riveting of the pole 3 and the cover plate 2.
  • the stopper 31 and the flange 32 both play a limiting role. The stopper 31 and the flange 32 cooperate to press the cover 2 tightly to prevent the pole 3 from falling off from the through hole 21 on the cover 2 .
  • the insulating sealing ring 51 is compressed during the formation of the flange 32 of the pole post 3, so that the gap between the stopper 31 and the cover plate 2 is completely filled with the insulating sealing ring. 51 filling, thereby improving the sealing performance of the battery.
  • the battery assembly further includes a first current collecting plate 6.
  • the first current collecting plate 6 is located on the side of the cover 2 close to the battery core 8.
  • the first current collecting plate 6 It is in contact with the pole 3 to realize the electrical connection between the first current collecting plate 6 and the pole 3 .
  • the first current collecting plate 6 includes a plate body 61 and an electrical connection portion 62.
  • the electrical connection portion 62 is formed by the plate body 61 extending and protruding toward the pole 3.
  • the plate body 61 61 is in contact with the end surface of the battery core 8
  • the electrical connection portion 62 is in contact with the pole 3 to realize the electrical connection between the electrical connection portion 62 and the pole 3 .
  • the pole 3 is provided with a central hole 33 , the electrical connection part 62 is inserted into the central hole 33 , and the electrical connection part 62 is electrically connected to the pole 3 .
  • the side wall of the electrical connection portion 62 is in contact with the inner wall of the central hole 33 to achieve electrical connection between the electrical connection portion 62 and the pole post 3 .
  • the cross-section of the electrical connection part 62 is a circular structure, and the electrical connection part 62 is a hollow truncated cone-shaped structure with a tapered diameter along the direction approaching the pole 3 .
  • the contact area between the first current collecting plate 6 and the pole 3 is increased, so that the heat generated inside the battery core 8 can be quickly dissipated from the pole 3, thereby Improve the thermal runaway caused by the high heat generated by the battery core 8 during high-rate charging and discharging.
  • the first current collecting plate 6 can also be a flat disk-shaped structure.
  • the battery assembly also includes an insulating sealing ring 51.
  • the insulating sealing ring 51 is sleeved on the pole 3 and close to the stopper 31.
  • the insulating sealing ring 51 is used between the pole 3 and the cover. Insulation and sealing between panels 2.
  • the insulating sealing ring 51 is at least partially disposed in the through hole 21 , and the insulating sealing ring 51 is located between the outer wall of the pole 3 and the inner wall of the through hole 21 .
  • the insulating sealing ring 51 has a T-shaped structure (of course, in other embodiments, the insulating sealing ring 51 can also have an O-shaped structure), and a part of the insulating sealing ring 51 is located in the through hole 21 (That is, between the outer wall of the pole 3 and the inner wall of the through hole 21), the other part is located on the outer side of the cover plate 2 and is sandwiched between the stopper 31 and the cover plate 2, so that the insulating sealing ring 51 can The seal between the pole 3 and the cover plate 2 has a good sealing effect and can simultaneously isolate the pole 3 and the cover plate 2 to prevent the pole 3 and the cover plate 2 from conducting electricity.
  • the stopper 31 will exert a squeezing effect on the insulating sealing ring 51, causing the stopper 31 to pressurize the pole 3.
  • the insulating sealing ring 51 between 31 and the cover plate 2 is pressed tightly, thereby further improving the sealing effect.
  • the battery assembly also includes an insulating ring 52.
  • the insulating ring 52 is provided between the stopper 31 and the cover plate 2.
  • the insulating ring 52 is used to isolate the pole post 3 and the cover plate 2. To prevent pole 3 and cover 2 from conducting electricity.
  • the insulating sealing ring 51 has a small circular ring structure with an open center
  • the insulating ring 52 has a large circular ring structure with an open center.
  • the insulating ring 52 is arranged around the periphery of the insulating sealing ring 51 .
  • the battery assembly further includes an insulating gasket 53 , and the insulating gasket 53 is disposed between the pressing block 4 and the cover plate 2 .
  • part of the insulating gasket 53 is located between the pressure block 4 and the cover plate 2 , and the other part is located between the first current collecting plate 6 and the cover plate 2 , thereby preventing the pressure block 4 and the cover plate from interfering with each other. 2 conduct electricity, and prevent the first current collecting plate 6 and the cover plate 2 from conducting electricity.
  • the battery assembly also includes a sealing piece 9 (the sealing piece 9 can be an explosion-proof piece).
  • the sealing piece 9 is sealingly connected to the top surface of the pole 3, and the sealing piece 9 seals the top surface of the pole 3.
  • the center hole is 33.
  • the battery assembly provided by the second embodiment of the present application is substantially the same as that of the first embodiment, except that the structures of the poles 3 and the first current collecting plate 6 are different.
  • the first current collecting plate 6 is a flat disk-shaped structure
  • the pole 3 is a solid block (that is, the pole 3 is not provided with a central hole 33)
  • the first current collecting plate 6 and The bottom surfaces of the poles 3 are in contact.
  • the battery assembly provided by the third embodiment of the present application is substantially the same as that of the first embodiment, except that the pressure block 4 is not provided on the pole 3 . Therefore, the insulating gasket 53 is directly sandwiched between the flange 32 and the cover plate 2 .
  • the battery assembly provided by the fourth embodiment of the present application is roughly the same as the first embodiment.
  • the difference lies in that the structures of the pole 3 and the first current collecting plate 6 are different, and there is no pressure block on the pole 3. 4.
  • the first current collecting plate 6 is a flat disk-shaped structure
  • the pole 3 is a solid block (that is, the pole 3 is not provided with a central hole 33)
  • the first current collecting plate 6 and The bottom surfaces of the poles 3 are in contact.
  • the insulating gasket 53 is directly sandwiched between the flange 32 and the cover plate 2 .
  • the battery assembly provided by the fifth embodiment of the present application is substantially the same as that of the first embodiment.
  • the difference is that the structure of the pole 3 is different, and the positions of the pressure block 4 and the insulating sealing ring 51 are different.
  • the pole 3 has an inverted T-shaped structure
  • the stopper 31 is provided at the bottom of the pole 3
  • the stopper 31 is located below the cover 2
  • the stopper 31 is located in the housing 1
  • the pressure block 4 is filled in the upper end of the pole 3.
  • the pressing block 4 is sandwiched between the flange 32 and the insulating ring 52
  • the insulating ring 52 is sandwiched between the pressing block 4 and the cover plate 2 .
  • a part of the insulating sealing ring 51 is located inside the through hole 21 (that is, between the outer wall of the pole 3 and the inner wall of the through hole 21 ), and the other part is located inside the cover plate 2 and is sandwiched between the stopper 31 and the cover plate 2 between.
  • the pole 3 and the cover 2 are riveted, the pole 3 with an inverted T-shaped structure is first inserted into the through hole 21 on the cover 2 from bottom to top, and then the upper end of the pole 3 is The flange 32 is formed by mechanical pressure and flattening. The stopper 31 and the flange 32 cooperate to press the cover 2 tightly, so that the pole 3 and the cover 2 are fixed, thereby achieving the riveting of the pole 3 and the cover 2. .
  • the battery assembly provided by the sixth embodiment of the present application is roughly the same as that of the fifth embodiment.
  • the pole 3 is also an inverted T-shaped structure. The difference lies in the structure of the pole 3 and the first current collecting plate 6.
  • the first current collecting plate 6 is a flat disk-shaped structure
  • the pole 3 is a solid block (that is, the pole 3 is not provided with a central hole 33)
  • the first current collecting plate 6 and The bottom surfaces of the poles 3 are in contact.
  • the battery assembly provided by the seventh embodiment of the present application is roughly the same as that of the fifth embodiment.
  • the pole 3 is also an inverted T-shaped structure. The difference is that there is no pressure block 4 on the pole 3 . Therefore, the insulating ring 52 is directly sandwiched between the flange 32 and the cover plate 2 .
  • the battery assembly provided by the eighth embodiment of the present application is roughly the same as that of the fifth embodiment.
  • the pole 3 is also an inverted T-shaped structure. The difference lies in the structure of the pole 3 and the first current collecting plate 6. , and there is no pressure block 4 on the pole 3.
  • the first current collecting plate 6 is a flat disk-shaped structure
  • the pole 3 is a solid block (that is, the pole 3 is not provided with a central hole 33)
  • the first current collecting plate 6 and The bottom surfaces of the poles 3 are in contact.
  • the insulating ring 52 is directly sandwiched between the flange 32 and the cover plate 2 .
  • the first embodiment of the present application also provides a battery, which is particularly suitable for cylindrical batteries.
  • the battery includes the above-mentioned battery assembly and a case 1.
  • the case 1 is a cylindrical tank structure.
  • the top of the case 1 is provided with an opening 11.
  • the cover plate 2 is used to seal the opening 11 of the case 1.
  • the cover plate 2 It is fixed at the opening 11 of the housing 1, and the cover plate 2 is electrically connected to the housing 1.
  • the opposite ends of the pole 3 are respectively located outside the opening 11 of the housing 1 and inside the opening 11 of the housing 1 .
  • the top of the cylindrical battery body is provided with a groove (not shown in the figure), and the pole 3 is inserted into the groove.
  • an insulating sealing ring 51 with matching specifications can also be inserted into the groove.
  • the battery also includes a first current collecting plate 6, a second current collecting plate 7 and a battery core 8.
  • the first current collecting plate 6, the second current collecting plate 7 and the battery core 8 Both sides of the first current collecting plate 6 are electrically connected to the top of the battery core 8 and the pole 3 respectively.
  • the second current collecting plate 7 is located between the bottom end of the battery core 8 and the case 1. Both sides of the second current collecting plate 7 are electrically connected to the bottom end of the battery core 8 and the case 1 respectively.
  • both sides of the first current collecting plate 6 are respectively in contact with the top end of the battery core 8 and the pole 3 to achieve electrical connection
  • both sides of the second current collecting plate 7 are respectively in contact with The bottom end of the battery core 8 is in contact with the housing 1 to achieve electrical connection.
  • the first current collecting plate 6 includes a plate body 61 and an electrical connection portion 62 .
  • the electrical connection portion 62 extends and protrudes from the plate body 61 toward the pole 3 .
  • the plate body 61 It is in contact with the end surface of the battery core 8; the pole post 3 is provided with a central hole 33, the electrical connection part 62 is inserted into the central hole 33, and the side wall of the electrical connection part 62 is in contact with the inner wall of the central hole 33.
  • the two ends of the battery core 8 are respectively provided with positive electrode tabs 81 and negative electrode tabs 82
  • the pole 3 is the positive pole
  • the first current collecting plate 6 is the positive current collecting plate
  • the second The current collecting plate 7 is a negative electrode current collecting plate. Both sides of the first current collecting plate 6 are in contact with the positive electrode lug 81 and the pole 3 of the battery core 8 respectively. Both sides of the second current collecting plate 7 are respectively in contact with the positive electrode lug 81 and the pole 3 of the battery core 8
  • the negative electrode tab 82 is in contact with the bottom wall of the housing 1 .
  • the pole 3 is a negative pole
  • the first current collecting plate 6 is a negative current collecting plate
  • the second current collecting plate 7 is a positive current collecting plate
  • the first current collecting plate 6 is The two sides are respectively in contact with the negative electrode lug 82 of the battery core 8 and the pole 3 .
  • the two sides of the second current collecting plate 7 are respectively in contact with the positive electrode lug 81 of the battery core 8 and the bottom wall of the housing 1 .
  • the casing 1 can be a steel shell (of course it can also be made of other materials).
  • the pole 3 serves as the positive electrical connection terminal of the battery, and the casing 1 and the cover 2 serve as the battery.
  • the negative electrical connection terminal of the battery; when the pole 3 is the negative pole, the housing 1 can be an aluminum shell.
  • the pole 3 serves as the negative electrical connection terminal of the battery, and the shell 1 and the cover 2 serve as the positive electrical connection terminal of the battery. .
  • the pole 3 and the cover 2 are used as the positive electrical connection terminal and the negative electrical connection terminal respectively (or the pole 3 is used as the negative electrical connection terminal and the cover 2 is used as the positive electrical connection terminal), thereby connecting the positive and negative electrodes of the battery.
  • the negative electrode is led to the same side of the battery.
  • it is conducive to battery grouping, can facilitate battery arrangement, and reduce battery grouping. It reduces the number of structural components, simplifies the wiring design of the BMS, reduces costs, and at the same time makes the battery arrangement more compact and improves the energy density of the battery.
  • the positive electrode lug 81 and the negative electrode lug 82 of the battery core 8 both adopt a full-lug design.
  • the ears 82 may be secured by welding.
  • an electrolyte solution is also provided in the case 1 so that the battery can be charged and discharged through the electrochemical reaction of the positive and negative electrode sheets of the battery core 8 and the electrolyte solution.
  • the electrolyte solution can be formed from organic solvents such as EC, PC, DEC, EMC and EMC and lithium salts such as LiPF 6 or LiBF 4.
  • the electrolyte can be in a liquid, solid or gel state, etc.
  • the first embodiment of the present application also provides a method for manufacturing a battery component.
  • the preparation method includes:
  • the pole post 3 and the cover plate 2 are fixed by riveting.
  • the cover 2 is provided with a through hole 21
  • the pole 3 has a first end 30B and a second end 30C that are oppositely arranged, and the first end 30B of the pole 3 is provided with a stopper 31 .
  • the above-mentioned process of penetrating the pole 3 through the cover 2 includes: inserting the pole 3 into the through hole 21 of the cover 2 until the second end 30C of the pole 3 passes through the cover 2 .
  • the above-mentioned fixing of the pole post 3 and the cover plate 2 through riveting includes: mechanically pressing the second end 30C of the pole pole 3 to form the flange 32, so that the pole post 3 and the cover plate 2 are fixed by riveting, so as to prevent the pole 3 from being fixed to the cover plate 2 by riveting.
  • the stopper 31 and the flange 32 cooperate to press the cover 2 tightly.
  • the positive and negative of the battery are connected.
  • the poles are led to the same side of the battery, which is conducive to battery grouping, can facilitate battery arrangement, reduce the number of structural components when the battery is grouped, simplify the BMS wiring design, reduce costs, and make the battery arrangement more compact. Improve battery energy density;
  • the contact area between the first current collecting plate 6 and the pole 3 is increased, so that the heat generated inside the battery core 8 can be quickly discharged from the pole 3 , thereby improving the thermal runaway caused by the large amount of heat generated by the battery core 8 during high-rate charging and discharging;
  • the sealing performance of the insulating sealing ring 51 is good (when the pole 3 and the cover plate 2 are riveted, the pole 3 will exert a squeezing effect on the insulating sealing ring 51 when it is upset, causing the insulating sealing ring 51 to be compressed. Thereby improving the sealing effect of the insulating sealing ring 51) and being durable, it can prevent the battery from leaking during long-term use and increase the service life of the battery;
  • the insulating gasket 53 can be prevented from being cracked or crushed during the upsetting process of the pole 3, thereby affecting the sealing of the battery.
  • the insulating gasket 53 is easily crushed or cracked.
  • the pressure block 4 since the surface area of the pressure block 4 is larger than the surface area of the flange 23, the contact area with the insulating gasket 53 increases; in addition, because the pressure block 4 has a certain elasticity, the pressure block 4 can further buffer The pressure on the insulating gasket 53 during the upsetting process. Therefore, by arranging the pressing block 4, the contact area with the insulating gasket 53 is increased, and it plays a buffering role, greatly reducing the pressure on the insulating gasket 53 during the upsetting process, thereby improving the sealing performance of the battery.

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

Abstract

本申请提供一种电池组件，包括盖板（2）和极柱（3），所述极柱（3）贯穿所述盖板（2）并与所述盖板（2）通过铆接固定。本申请提供的电池组件，极柱（3）与盖板（2）通过铆接固定，相较于焊接的固定方式，不仅简化了固定操作，提高了生产效率，而且降低了生产成本。本申请还提供一种电池组件的制备方法、电池和电动交通工具。

Description

电池组件及制备方法、电池和电动交通工具 技术领域
本申请涉及电池技术领域，尤其是涉及一种电池组件及其制备方法、电池和电动交通工具。
 背景技术
随着电子技术的发展，锂离子电池具有的比功率高、循环寿命长、安全性能好以及无污染等优点使其得到广泛地应用。锂离子电池根据外形可分为圆柱电池、方壳电池和软包电池等，其中圆柱电池受到越来越多的关注，圆柱电池的应用也越来越广泛。
 技术问题
现有的圆柱电池一般包括壳体、盖板和电芯等，现有的圆柱电池的正极连接端子和负极连接端子分别设置于圆柱电池的相对两端，从而对电池的成组技术有一定限制，影响电池的排布和电池能量密度（由于正极连接端子和负极连接端子分别设置于圆柱电池的相对两端，在电池串并联成组时，必须先按照相应极性的需求摆放电池，不仅增加了电池摆放错误的风险，而且增加了结构零部件的数量，使布线设计较为复杂，增加了生产成本，降低了电池的能量密度）。而且，现有的圆柱电池集流盘与极柱电连接路径长，接触面积小，从而导热性能差。因此，现有的圆柱电池还需要在结构上进行改进，以解决电池成组的排布复杂性、生产成本等问题，同时改善电池的散热性能和密封性能。
 技术解决方案
本申请的目的是提供一种电池组件及电池，旨在解决或至少部分解决上述背景技术存在的不足，极柱与盖板通过铆接固定，相较于焊接的固定方式，不仅简化了固定操作，提高了生产效率，而且降低了生产成本。
本申请的一种实施例提供一种电池组件，包括盖板和极柱，所述极柱贯穿所述盖板并与所述盖板通过铆接固定。
在一种可实现的方式中，所述盖板上设有通孔，所述极柱包括主体部及分别位于所述主体部相对两端的第一端和第二端，所述主体部设置于所述通孔内，所述第一端和所述第二端由所述主体部分别以相反的方向向所述通孔外延伸凸出，所述盖板、所述第一端和所述第二端三者铆接；所述盖板参与铆接的部分位于所述第一端和所述第二端之间。
在一种可实现的方式中，所述极柱的第一端设有止挡部，所述极柱的第二端形成有凸缘，所述止挡部、凸缘与所述盖板形成铆接；所述盖板参与铆接的部分位于所述止挡部和所述凸缘之间。
在一种可实现的方式中，所述电池组件还包括压块，所述压块参与铆接，即所述压块、所述极柱与所述盖板三者铆接，所述压块设置于所述极柱的第一端和/或第二端。
在一种可实现的方式中，所述压块为环形结构，所述压块套设于所述极柱的第一端和/或第二端。
在一种可实现的方式中，所述极柱的第一端或第二端形成有凸缘，所述压块设置于所述极柱上靠近所述凸缘的位置，所述压块位于所述凸缘与所述盖板之间；或者，所述极柱的第一端或第二端具有止挡部，所述压块设置于所述极柱上靠近所述止挡部的位置，所述压块位于所述止挡部与所述盖板之间。
在一种可实现的方式中，所述电池组件还包括绝缘密封圈，所述绝缘密封圈套设于所述极柱上，所述绝缘密封圈用于所述极柱与所述盖板之间的绝缘和密封。
在一种可实现的方式中，所述电池组件还包括第一集流盘，所述第一集流盘与所述极柱电连接。
在一种可实现的方式中，所述第一集流盘包括盘体和电连接部，所述电连接部由所述盘体朝向所述极柱延伸凸出形成，所述电连接部与所述极柱电连接。
在一种可实现的方式中，所述极柱上设有中心孔，所述电连接部插入在所述中心孔内，所述电连接部与所述极柱电连接。
在一种可实现的方式中，所述电连接部的侧壁与所述中心孔的内壁相接触以实现所述电连接部与所述极柱之间的电连接。
在一种可实现的方式中，所述电池组件还包括密封片，所述密封片与所述极柱密封连接，所述密封片密封所述极柱上的中心孔。
在一种可实现的方式中，所述极柱为正极柱或负极柱。
本申请的另一种实施例还提供一种电池，包括以上所述的电池组件。
在一种可实现的方式中，所述电池还包括壳体，所述壳体的至少一端设有开口，所述盖板用于密封所述壳体的开口；所述极柱的相对两端分别位于所述壳体的开口外和所述壳体的开口内。
在一种可实现的方式中，所述电池还包括第一集流盘、第二集流盘和电芯，所述第一集流盘、所述第二集流盘和所述电芯均设置于所述壳体内，所述第一集流盘的两侧分别与所述电芯的顶端和所述极柱电连接，所述第二集流盘的两侧分别与所述电芯的底端和所述壳体电连接。
在一种可实现的方式中，所述第一集流盘的两侧分别与所述电芯的顶端和所述极柱相接触以实现电连接，所述第二集流盘的两侧分别与所述电芯的底端和所述壳体相接触以实现电连接。
在一种可实现的方式中，所述第一集流盘可以为正极集流盘或负极集流盘；所述第二集流盘也可以为正极集流盘或负极集流盘。当所述第一集流盘为正极集流盘时，所述第二集流盘为负极集流盘；相反当所述第一集流盘为负极集流盘时，所述第二集流盘为正极集流盘。
本申请的另一种实施例还提供一种电动交通工具，包括以上所述的电池。
本申请的另一种实施例还提供一种电池组件的制备方法，所述制备方法包括：
提供盖板和极柱；
将所述极柱贯穿所述盖板；以及
通过铆接将所述极柱与所述盖板固定。
在一种可实现的方式中，所述盖板上设有通孔，所述极柱具有相对设置的第一端和第二端，所述极柱的第一端设有止挡部；
上述将所述极柱贯穿所述盖板，包括：将所述极柱插入所述盖板的通孔内，直至所述极柱的第二端贯穿所述盖板；
上述通过铆接将所述极柱与所述盖板固定，包括：对所述极柱的第二端进行机械加压以形成凸缘，使所述极柱与所述盖板通过铆接固定，所述止挡部和所述凸缘相配合将所述盖板压紧。
 有益效果
本申请提供的电池组件，极柱与盖板通过铆接固定，相较于焊接的固定方式，不仅简化了固定操作，提高了生产效率，而且降低了生产成本。
 附图说明
图1为本申请第一实施例中电池组件的截面示意图。
图2为图1中盖板的截面示意图。
图3为图1中极柱的截面示意图。
图4为图1中第一集流盘的立体结构示意图。
图5为本申请第二实施例中电池组件的截面示意图。
图6为本申请第三实施例中电池组件的截面示意图。
图7为本申请第四实施例中电池组件的截面示意图。
图8为本申请第五实施例中电池组件的截面示意图。
图9为本申请第六实施例中电池组件的截面示意图。
图10为本申请第七实施例中电池组件的截面示意图。
图11为本申请第八实施例中电池组件的截面示意图。
 本发明的实施方式
下面结合附图和实施例，对本申请的具体实施方式作进一步详细描述。以下实施例用于说明本申请，但不用来限制本申请的范围。
本申请的说明书和权利要求书中的术语“第一”、“第二”、“第三”、“第四”等（如果存在）是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
本申请的说明书和权利要求书中所涉及的上、下、左、右、前、后、顶、底等（如果存在）方位词是以附图中的结构位于图中的位置以及结构相互之间的位置来定义的，只是为了表达技术方案的清楚及方便。应当理解，方位词的使用不应限制本申请请求保护的范围。
如图1至图4所示，本申请第一实施例提供的电池组件，包括盖板2和极柱3，极柱3贯穿盖板2并与盖板2通过铆接固定。
具体地，本实施例中极柱3与盖板2通过铆接固定，相较于焊接固定的方法，不仅简化了操作，提高了生产效率，而且降低了生产成本。
如图1至图3所示，作为一种实施方式，盖板2上设有通孔21，极柱3包括主体部30A及分别位于主体部30A相对两端的第一端30B和第二端30C，主体部30A插入于通孔21内，第一端30B和第二端30C由主体部30A分别以相反的方向向通孔21外延伸凸出（在本实施例中，第一端30B由主体部30A向上延伸凸出，第二端30C由主体部30A向下延伸凸出），盖板2、第一端30B和第二端30C三者铆接，盖板2参与铆接的部分位于第一端30B和第二端30C之间。
如图1所示，作为一种实施方式，电池组件还包括压块4，压块4参与铆接，即压块4、极柱3与盖板2三者铆接，压块4设置于极柱3的第一端30B和/或第二端30C。在铆接时，极柱3和压块4相嵌合。
具体地，在本实施例中，压块4可以为铝块。当然，在其它实施例中，压块4还可以为其它材料制成。
如图1所示，作为一种实施方式，压块4设置于极柱3的第二端30C（即压块4填补在极柱3的下端）。当然，在其它实施例中，压块4也可以设置于极柱3的第一端30B，或者同时设置于极柱3的第一端30B和第二端30C。
如图1所示，作为一种实施方式，压块4为环形结构，压块4套设于极柱3的第二端30C。当然，在其它实施例中，压块4也可以套设于极柱3的第一端30B，或者同时套设于极柱3的第一端30B和第二端30C。
如图1所示，作为一种实施方式，极柱3为T形结构，极柱3的第一端30B设有止挡部31，止挡部31由极柱3的侧壁沿径向向外凸出形成，止挡部31位于盖板2的一侧；极柱3的第二端30C形成有凸缘32，凸缘32由极柱3的侧壁沿径向向外凸出形成，凸缘32位于盖板2的另一侧。在极柱3的径向方向上，止挡部31的直径大于凸缘32的直径。止挡部31、凸缘32与盖板2形成铆接，盖板2参与铆接的部分位于止挡部31和凸缘32之间。当然，在其它实施例中，也可以是极柱3的第二端30C设有止挡部31，极柱3的第一端30B形成有凸缘32。
具体地，在本实施例中，止挡部31设置于极柱3的顶部，止挡部31位于盖板2上方，且止挡部31位于壳体1外；凸缘32设置于极柱3的底部，凸缘32位于盖板2下方，且凸缘32位于壳体1内。
如图1所示，作为一种实施方式，压块4套设于极柱3上靠近凸缘32的位置，压块4位于凸缘32与盖板2之间。在铆接时，压块4与凸缘32相嵌合。当然，在其它实施例中，压块4也可以套设于极柱3上靠近止挡部31的位置，此时压块4位于止挡部31与盖板2之间。
具体地，如图1和图3所示，止挡部31为极柱3本身自带的结构（即止挡部31在极柱3和盖板2铆接前就存在），凸缘32为在极柱3和盖板2铆接时形成（即在极柱3和盖板2铆接前不存在凸缘32）。具体地，如图1所示，在本实施例中，当极柱3和盖板2在铆接时，先将T形结构的极柱3从上至下插入至盖板2上的通孔21内，然后对极柱3的下端进行机械加压（如旋铆等）压平形成凸缘32；在对极柱3的下端进行加压压平形成凸缘32的过程中，会对极柱3形成镦粗效果（即极柱3的长度缩短，直径增大），使得极柱3和盖板2相固定，从而实现极柱3和盖板2的铆接。其中，止挡部31和凸缘32均起到限位作用，止挡部31和凸缘32相配合将盖板2压紧，以防止极柱3从盖板2上的通孔21内脱落。同时，在极柱3和盖板2铆接时，极柱3在形成凸缘32的过程中，绝缘密封圈51被压缩，使止挡部31与盖板2之间的间隙完全被绝缘密封圈51填充，从而提高电池的密封性能。
如图1及图4所示，作为一种实施方式，电池组件还包括第一集流盘6，第一集流盘6位于盖板2靠近电芯8的一侧，第一集流盘6与极柱3相接触以实现第一集流盘6与极柱3的电连接。
如图1及图4所示，作为一种实施方式，第一集流盘6包括盘体61和电连接部62，电连接部62由盘体61朝向极柱3延伸凸出形成，盘体61与电芯8的端面相接触，电连接部62与极柱3相接触以实现电连接部62与极柱3的电连接。
如图1及图4所示，作为一种实施方式，极柱3上设有中心孔33，电连接部62插入在中心孔33内，电连接部62与极柱3电连接。
具体地，电连接部62的侧壁与中心孔33的内壁相接触，以实现电连接部62与极柱3之间的电连接。
具体地，在本实施例中，电连接部62的横截面为圆形结构，电连接部62为沿着靠近极柱3的方向呈直径渐缩的中空圆台形结构。通过在第一集流盘6上设置电连接部62，从而增大第一集流盘6与极柱3的接触面积，使电芯8内部产生的热量能够快速地从极柱3导出，从而改善大倍率充放电时因电芯8发热量大导致的热失控。当然，如图5所示，在其它实施例中，第一集流盘6也可以为扁平状的圆盘形结构。
如图1所示，作为一种实施方式，电池组件还包括绝缘密封圈51，绝缘密封圈51套设于极柱3上并靠近止挡部31，绝缘密封圈51用于极柱3与盖板2之间的绝缘和密封。
如图1所示，作为一种实施方式，绝缘密封圈51至少部分设置于通孔21内，绝缘密封圈51位于极柱3的外侧壁与通孔21的内壁之间。
具体地，在本实施例中，绝缘密封圈51为T形结构（当然，在其它实施例中，绝缘密封圈51也可以为O形等结构），绝缘密封圈51的一部分位于通孔21内（即位于极柱3的外侧壁与通孔21的内壁之间），另一部分位于盖板2的外侧并夹设于止挡部31与盖板2之间，从而使得绝缘密封圈51能够对极柱3与盖板2之间的密封起到良好的密封效果，同时能够隔绝极柱3和盖板2，以防止极柱3和盖板2导电。同时，在极柱3和盖板2铆接时，在对极柱3进行加压使极柱3镦粗的过程中，止挡部31会对绝缘密封圈51形成挤压作用，使得止挡部31与盖板2之间的绝缘密封圈51被压紧，从而进一步提高密封效果。
如图1所示，作为一种实施方式，电池组件还包括绝缘环52，绝缘环52设置于止挡部31与盖板2之间，绝缘环52用于隔绝极柱3和盖板2，以防止极柱3和盖板2导电。
具体地，在本实施例中，绝缘密封圈51为中心开口的小圆环结构，绝缘环52为中心开口的大圆环结构，绝缘环52环绕绝缘密封圈51的外围一圈设置。
如图1所示，作为一种实施方式，电池组件还包括绝缘垫片53，绝缘垫片53设置于压块4与盖板2之间。
具体地，在本实施例中，绝缘垫片53的一部分位于压块4与盖板2之间，另一部分位于第一集流盘6与盖板2之间，从而防止压块4和盖板2导电，以及防止第一集流盘6与盖板2导电。
如图1所示，作为一种实施方式，电池组件还包括密封片9（密封片9可以为防爆片），密封片9与极柱3的顶面密封连接，密封片9密封极柱3上的中心孔33。
如图5所示，本申请第二实施例提供的电池组件与第一实施例大致相同，不同点在于极柱3和第一集流盘6的结构不同。具体地，在本实施例中，第一集流盘6为扁平状的圆盘形结构，极柱3为实心块（即极柱3上未设置中心孔33），第一集流盘6与极柱3的底面相接触。
如图6所示，本申请第三实施例提供的电池组件与第一实施例大致相同，不同点在于极柱3上未设置压块4。因此，绝缘垫片53直接夹设于凸缘32与盖板2之间。
如图7所示，本申请第四实施例提供的电池组件与第一实施例大致相同，不同点在于极柱3和第一集流盘6的结构不同，且极柱3上未设置压块4。具体地，在本实施例中，第一集流盘6为扁平状的圆盘形结构，极柱3为实心块（即极柱3上未设置中心孔33），第一集流盘6与极柱3的底面相接触。另外，绝缘垫片53直接夹设于凸缘32与盖板2之间。
如图8所示，本申请第五实施例提供的电池组件与第一实施例大致相同，不同点在于极柱3的结构不同，同时压块4和绝缘密封圈51设置的位置不同。具体地，在本实施例中，极柱3为倒T形结构，止挡部31设置于极柱3的底部，止挡部31位于盖板2下方，且止挡部31位于壳体1内，压块4填补在极柱3的上端。压块4夹设于凸缘32与绝缘环52之间，绝缘环52夹设于压块4与盖板2之间。绝缘密封圈51的一部分位于通孔21内（即位于极柱3的外侧壁与通孔21的内壁之间），另一部分位于盖板2的内侧并夹设于止挡部31与盖板2之间。在本实施例中，当极柱3和盖板2在铆接时，先将倒T形结构的极柱3从下至上插入至盖板2上的通孔21内，然后对极柱3的上端进行机械加压压平形成凸缘32，止挡部31和凸缘32相配合将盖板2压紧，使得极柱3和盖板2相固定，从而实现极柱3和盖板2的铆接。
如图9所示，本申请第六实施例提供的电池组件与第五实施例大致相同，极柱3也为倒T形结构，不同点在于极柱3和第一集流盘6的结构不同。具体地，在本实施例中，第一集流盘6为扁平状的圆盘形结构，极柱3为实心块（即极柱3上未设置中心孔33），第一集流盘6与极柱3的底面相接触。
如图10所示，本申请第七实施例提供的电池组件与第五实施例大致相同，极柱3也为倒T形结构，不同点在于极柱3上未设置压块4。因此，绝缘环52直接夹设于凸缘32与盖板2之间。
如图11所示，本申请第八实施例提供的电池组件与第五实施例大致相同，极柱3也为倒T形结构，不同点在于极柱3和第一集流盘6的结构不同，且极柱3上未设置压块4。具体地，在本实施例中，第一集流盘6为扁平状的圆盘形结构，极柱3为实心块（即极柱3上未设置中心孔33），第一集流盘6与极柱3的底面相接触。另外，绝缘环52直接夹设于凸缘32与盖板2之间。
如图1所示，本申请第一实施例还提供一种电池，尤其适用于圆柱电池。该电池包括以上所述的电池组件和壳体1，壳体1为圆柱形槽体结构，壳体1的顶端设有开口11，盖板2用于密封壳体1的开口11，盖板2固定在壳体1的开口11处，且盖板2与壳体1电性连接。极柱3的相对两端分别位于壳体1的开口11外和壳体1的开口11内。
作为另一种实施方式，所述圆柱电池本体顶端设有凹槽（图中未示出），且凹槽内插接有极柱3。此外，所述凹槽内还可以套接有规格相适配的绝缘密封圈51。
如图1所示，作为一种实施方式，电池还包括第一集流盘6、第二集流盘7和电芯8，第一集流盘6、第二集流盘7和电芯8均设置于壳体1内，第一集流盘6位于电芯8的顶端与极柱3之间，第一集流盘6的两侧分别与电芯8的顶端和极柱3电连接。第二集流盘7位于电芯8的底端与壳体1之间，第二集流盘7的两侧分别与电芯8的底端和壳体1电连接。
如图1所示，作为一种实施方式，第一集流盘6的两侧分别与电芯8的顶端和极柱3相接触以实现电连接，第二集流盘7的两侧分别与电芯8的底端和壳体1相接触以实现电连接。
如图1及图4所示，作为一种实施方式，第一集流盘6包括盘体61和电连接部62，电连接部62由盘体61朝向极柱3延伸凸出，盘体61与电芯8的端面相接触；极柱3上设有中心孔33，电连接部62插入在中心孔33内，电连接部62的侧壁与中心孔33的内壁相接触。
如图1所示，作为一种实施方式，电芯8的两端分别设有正极耳81和负极耳82，极柱3为正极柱，第一集流盘6为正极集流盘，第二集流盘7为负极集流盘，第一集流盘6的两侧分别与电芯8的正极耳81和极柱3相接触，第二集流盘7的两侧分别与电芯8的负极耳82和壳体1的底壁相接触。当然，在其它实施例中，也可以是：极柱3为负极柱，第一集流盘6为负极集流盘，第二集流盘7为正极集流盘，第一集流盘6的两侧分别与电芯8的负极耳82和极柱3相接触，第二集流盘7的两侧分别与电芯8的正极耳81和壳体1的底壁相接触。
具体地，当极柱3为正极柱时，壳体1可以为钢壳（当然也可以为其它材料），此时极柱3作为电池的正极电连接端子，壳体1及盖板2作为电池的负极电连接端子；当极柱3为负极柱时，壳体1可以为铝壳，此时极柱3作为电池的负极电连接端子，壳体1及盖板2作为电池的正极电连接端子。本实施例通过将极柱3和盖板2分别作为正极电连接端子和负极电连接端子（或将极柱3作为负极电连接端子，盖板2作为正极电连接端子），从而将电池的正负极引出至电池的同一侧，相较于将正极电连接端子和负极电连接端子分别设置于电池的相对两端的设计，有利于电池的成组，能够方便电池的排布，减少电池成组时结构零部件的数量，简化BMS的布线设计，降低成本，同时使电池的排列更加紧凑，提高电池的能量密度。
如图1所示，作为一种实施方式，电芯8的正极耳81和负极耳82均采用全极耳的设计，第一集流盘6与正极耳81以及第二集流盘7与负极耳82可以通过焊接固定。
作为一种实施方式，壳体1内还设有电解质溶液，以使电池能够通过电芯8的正极片和负极片以及电解质溶液的电化学反应进行充放电。电解质溶液可以由诸如EC、PC、DEC、EMC和EMC的有机溶剂以及诸如LiPF 6或LiBF 4的锂盐形成，电解质可以呈液态、固态或凝胶态等。
本申请第一实施例还提供一种电池组件的制备方法，该制备方法包括：
提供盖板2和极柱3；
将极柱3贯穿盖板2；以及
通过铆接将极柱3与盖板2固定。
作为一种实施方式，盖板2上设有通孔21，极柱3具有相对设置的第一端30B和第二端30C，极柱3的第一端30B设有止挡部31。
具体地，上述将极柱3贯穿盖板2，包括：将极柱3插入盖板2的通孔21内，直至极柱3的第二端30C穿过盖板2。
具体地，上述通过铆接将极柱3与盖板2固定，包括：对极柱3的第二端30C进行机械加压以形成凸缘32，使极柱3与盖板2通过铆接固定，止挡部31和凸缘32相配合将盖板2压紧。
本申请实施例提供的电池组件及电池的优点在于：
1、通过极柱3与盖板2铆接，不仅简化了操作，提高了生产效率，而且降低了生产成本；
2、通过将极柱3和盖板2分别作为正极电连接端子和负极电连接端子（或将极柱3作为负极电连接端子，盖板2作为正极电连接端子），从而将电池的正负极引出至电池的同一侧，有利于电池的成组，能够方便电池的排布，减少电池成组时结构零部件的数量，简化BMS的布线设计，降低成本，同时使电池的排列更加紧凑，提高电池的能量密度；
3、通过在第一集流盘6上设置电连接部62，从而增大第一集流盘6与极柱3的接触面积，使电芯8内部产生的热量能够快速地从极柱3导出，从而改善大倍率充放电时因电芯8发热量大导致的热失控；
4、绝缘密封圈51的密封性能好（在极柱3和盖板2铆接时，极柱3在被镦粗时会对绝缘密封圈51形成挤压作用，使得绝缘密封圈51被压紧，从而提高绝缘密封圈51的密封效果），长久耐用，能够防止电池在长期使用中出现漏液的问题，增加电池的使用寿命；
5、通过设置压块4，可以防止极柱3在镦粗过程中，绝缘垫片53被压裂或压破，从而影响电池的密封性。在镦粗过程中，由于形成的凸缘32与绝缘垫片53之间的接触面积小，容易压破或压裂绝缘垫片53。而增加压块4后，由于压块4的表面积大于凸缘23的表面积，使其与绝缘垫片53的接触面积增大；此外，由于压块4具有一定的弹性，压块4能够进一步缓冲镦粗过程中对绝缘垫片53的压力。因此，通过设置压块4，增加了与绝缘垫片53的接触面积，且起到了缓冲的作用，大大减小了镦粗过程中绝缘垫片53受到的压力，从而提高电池的密封性能。
以上，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (19)

  1. 一种电池组件，包括盖板（2）和极柱（3），其特征在于，所述极柱（3）贯穿所述盖板（2）并与所述盖板（2）通过铆接固定。
  2. 如权利要求1所述的电池组件，其特征在于，所述盖板（2）上设有通孔（21），所述极柱（3）包括主体部（30A）及分别位于所述主体部（30A）相对两端的第一端（30B）和第二端（30C），所述主体部（30A）插入于所述通孔（21）内，所述第一端（30B）和所述第二端（30C）由所述主体部（30A）分别以相反的方向向所述通孔（21）外延伸凸出，所述盖板（2）、所述第一端（30B）和所述第二端（30C）铆接；所述盖板（2）参与铆接的部分位于所述第一端（30B）和所述第二端（30C）之间。
  3. 如权利要求2所述的电池组件，其特征在于，所述极柱（3）的第一端（30B）设有止挡部（31），所述极柱（3）的第二端（30C）形成有凸缘（32），所述止挡部（31）、所述凸缘（32）与所述盖板（2）形成铆接；所述盖板（2）参与铆接的部分位于所述止挡部（31）和所述凸缘（32）之间。
  4. 如权利要求2所述的电池组件，其特征在于，所述电池组件还包括压块（4），所述压块（4）参与铆接，所述压块（4）设置于所述极柱（3）的第一端（30B）和/或第二端（30C）。
  5. 如权利要求4所述的电池组件，其特征在于，所述压块（4）为环形结构，所述压块（4）套设于所述极柱（3）的第一端（30B）和/或第二端（30C）。
  6. 如权利要求4所述的电池组件，其特征在于，所述极柱（3）的第一端（30B）或第二端（30C）形成有凸缘（32），所述压块（4）设置于所述极柱（3）上靠近所述凸缘（32）的位置，所述压块（4）位于所述凸缘（32）与所述盖板（2）之间；或者，所述极柱（3）的第一端（30B）或第二端（30C）具有止挡部（31），所述压块（4）设置于所述极柱（3）上靠近所述止挡部（31）的位置，所述压块（4）位于所述止挡部（31）与所述盖板（2）之间。
  7. 如权利要求1所述的电池组件，其特征在于，所述电池组件还包括绝缘密封圈（51），所述绝缘密封圈（51）套设于所述极柱（3）上，所述绝缘密封圈（51）用于所述极柱（3）与所述盖板（2）之间的绝缘和密封。
  8. 如权利要求1所述的电池组件，其特征在于，所述电池组件还包括第一集流盘（6），所述第一集流盘（6）与所述极柱（3）电连接。
  9. 如权利要求8所述的电池组件，其特征在于，所述第一集流盘（6）包括盘体（61）和电连接部（62），所述电连接部（62）由所述盘体（61）朝向所述极柱（3）延伸凸出形成，所述电连接部（62）与所述极柱（3）电连接。
  10. 如权利要求9所述的电池组件，其特征在于，所述极柱（3）上设有中心孔（33），所述电连接部（62）插入在所述中心孔（33）内，所述电连接部（62）与所述极柱（3）电连接。
  11. 如权利要求10所述的电池组件，其特征在于，所述电连接部（62）的侧壁与所述中心孔（33）的内壁相接触以实现所述电连接部（62）与所述极柱（3）之间的电连接。
  12. 如权利要求10所述的电池组件，其特征在于，所述电池组件还包括密封片（9），所述密封片（9）与所述极柱（3）密封连接，所述密封片（9）密封所述极柱（3）上的中心孔（33）。
  13. 如权利要求1-12中任一项所述的电池组件，其特征在于，所述极柱（3）为正极柱或负极柱。
  14. 一种电池，其特征在于，包括如权利要求1-13中任一项所述的电池组件。
  15. 如权利要求14所述的电池，其特征在于，所述电池还包括壳体（1），所述壳体（1）的至少一端设有开口（11），所述盖板（2）用于密封所述壳体（1）的开口（11）；所述极柱（3）的相对两端分别位于所述壳体（1）的开口（11）外和所述壳体（1）的开口（11）内。
  16. 如权利要求15所述的电池，其特征在于，所述电池还包括第一集流盘（6）、第二集流盘（7）和电芯（8），所述第一集流盘（6）、所述第二集流盘（7）和所述电芯（8）均设置于所述壳体（1）内，所述第一集流盘（6）的两侧分别与所述电芯（8）的顶端和所述极柱（3）电连接，所述第二集流盘（7）的两侧分别与所述电芯（8）的底端和所述壳体（1）电连接。
  17. 一种电动交通工具，其特征在于，包括如权利要求14-16中任一项所述的电池。
  18. 一种电池组件的制备方法，其特征在于，所述制备方法包括：
    提供盖板（2）和极柱（3）；
    将所述极柱（3）贯穿所述盖板（2）；以及
    通过铆接将所述极柱（3）与所述盖板（2）固定。
  19. 如权利要求18所述的制备方法，其特征在于，所述盖板（2）上设有通孔（21），所述极柱（3）具有相对设置的第一端（30B）和第二端（30C），所述极柱（3）的第一端（30B）设有止挡部（31）；
    上述将所述极柱（3）贯穿所述盖板（2），包括：将所述极柱（3）插入所述盖板（2）的通孔（21）内，直至所述极柱（3）的第二端（30C）贯穿所述盖板（2）；
    上述通过铆接将所述极柱（3）与所述盖板（2）固定，包括：对所述极柱（3）的第二端（30C）进行机械加压以形成凸缘（32），使所述极柱（3）与所述盖板（2）通过铆接固定，所述止挡部（31）和所述凸缘（32）相配合将所述盖板（2）压紧。
PCT/CN2022/109818 2022-03-15 2022-08-02 电池组件及制备方法、电池和电动交通工具 Ceased WO2023173652A1 (zh)

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