CN219350596U - Top cap subassembly and secondary cell - Google Patents

Top cap subassembly and secondary cell Download PDF

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Publication number
CN219350596U
CN219350596U CN202320328956.9U CN202320328956U CN219350596U CN 219350596 U CN219350596 U CN 219350596U CN 202320328956 U CN202320328956 U CN 202320328956U CN 219350596 U CN219350596 U CN 219350596U
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China
Prior art keywords
hole
section
post
cap
assembly
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Active
Application number
CN202320328956.9U
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Chinese (zh)
Inventor
杨伟
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Xinwangda Power Technology Co ltd
Original Assignee
Sunwoda Electric Vehicle Battery Co Ltd
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Application filed by Sunwoda Electric Vehicle Battery Co Ltd filed Critical Sunwoda Electric Vehicle Battery Co Ltd
Priority to CN202320328956.9U priority Critical patent/CN219350596U/en
Application granted granted Critical
Publication of CN219350596U publication Critical patent/CN219350596U/en
Priority to PCT/CN2023/115429 priority patent/WO2024169154A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • 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
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular 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
    • H01M50/10—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
    • H01M50/50—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
    • 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
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular 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
    • 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

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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

The application discloses a top cap subassembly and secondary cell belongs to energy storage device technical field. The top cap subassembly includes: a top cover sheet provided with a pole through hole; the pole terminal comprises an insertion section and an exposure section, the insertion section is provided with a transition groove, the insertion section is penetrated into the pole through hole, the exposure section is positioned at the periphery of the insertion section, and the exposure section is connected with the surface of the top cover sheet adjacent to the pole through hole; the sealing piece is accommodated in the transition groove and is connected with the groove wall of the transition groove. Through above-mentioned mode, this application can simplify the structure of top cap subassembly, consequently can effectively satisfy the demand of secondary cell lightweight to can also reduce the hydrops risk of utmost point post terminal in the top cap subassembly.

Description

Top cap subassembly and secondary cell
Technical Field
The application belongs to energy storage technical field, concretely relates to top cap subassembly and secondary cell.
Background
Today, the new energy automobile industry is vigorously developed, and the weight reduction of batteries is becoming more important. The traditional battery structure adopts the design of riveting piece, sets up riveting piece and base plate on the utmost point post and assembles, leads to battery space utilization to promote difficulty, battery lightweight design subalternation problem. Moreover, in the prior art, a groove is formed on the end face of the pole, and the groove is easy to generate the problem of effusion, namely, the pole in the prior art has higher risk of effusion.
Disclosure of Invention
The purpose of the application is as follows: the utility model provides a top cap subassembly and secondary cell can simplify the structure of top cap subassembly, consequently can effectively satisfy the demand of secondary cell lightweight to can also reduce the hydrops risk of utmost point post terminal in the top cap subassembly.
The technical scheme is as follows:
the application provides a top cap subassembly, include:
a top cover sheet provided with a pole through hole;
the pole terminal comprises an insertion section and an exposure section, the insertion section is provided with a transition groove, the insertion section is penetrated into the pole through hole, the exposure section is positioned at the periphery of the insertion section, and the exposure section is connected with the surface of the top cover sheet adjacent to the pole through hole;
the sealing piece is accommodated in the transition groove and is connected with the groove wall of the transition groove.
In some embodiments, the exposed section has a first end face and a second end face opposite each other in an axial direction of the post through hole, the second end face being crimped to a top cap sheet surface adjoining the post through hole.
In some embodiments, the cover further comprises a cap, the cap comprises a cover part and a protrusion arranged on one side of the cover part facing the top cover piece, the cover part covers the first end face, and the protrusion is inserted into the transition groove.
In some embodiments, the post terminal further comprises a base disposed at an end of the insertion section remote from the exposed section, the insertion section, and the base enclosing to form a recess, the recess clamping the top cover sheet.
In some embodiments, the cover further comprises an upper plastic comprising a body portion and a mating portion, the body portion is disposed around the mating portion, the body portion and the mating portion are disposed on a side of the cover sheet adjacent to the exposed section, and the mating portion is axially clamped between the cover sheet and the exposed section.
In some embodiments, the top cover sheet is further provided with a receiving groove, the receiving groove being disposed around the post through hole; the body part and the matching part are assembled in the accommodating groove.
In some embodiments, the mating portion includes a relief structure that abuts the second end face.
In some embodiments, the assembly further comprises a lower plastic sheet, wherein the lower plastic sheet is arranged on one side of the top cover sheet away from the exposed section, the lower plastic sheet is provided with an assembly hole, and the insertion section is penetrated in the assembly hole and the pole through hole; the side of lower plastic piece that deviates from the top cover piece is equipped with two lugs, and two lugs enclose and close and form the spacing groove, and the spacing groove is aligned along axial and mounting hole intercommunication, and the base member is assembled in the spacing inslot and is supported and hold down plastic piece.
In some embodiments, the seal ring further comprises a seal ring comprising a first seal portion and a second seal portion, the second seal portion disposed around the first seal portion, the first seal portion extending axially between the post through hole and the first seal portion being clamped between the insert section and the cap piece, the second seal portion extending radially of the post through hole and the second seal portion being clamped between the base and the cap piece.
The present application also provides a secondary battery including: the battery cell is arranged in the shell, and the top cover assembly is arranged on the shell.
The beneficial effects of this application are: unlike the prior art, the present application provides a top cap assembly and a secondary battery. The cap assembly includes a cap plate and a post terminal. The pole terminal comprises an inserting section and an exposing section, wherein the inserting section is arranged in the pole through hole of the top cover plate in a penetrating mode, the exposing section is located on the periphery of the inserting section, and the exposing section is connected with the surface of the top cover plate adjacent to the pole through hole. In other words, the pole terminal of the top cover assembly is arranged in the pole through hole in a penetrating way through the inserting section of the pole terminal, and the exposing section is abutted to the top cover plate, namely, the pole terminal forms a self-riveting structure, so that a riveting block in the prior art is omitted, the structure of the top cover assembly can be simplified, and the light-weight requirement of the secondary battery can be effectively met. The terminal of the pole further comprises a transition groove arranged at the insertion section, the weight of the terminal of the pole can be reduced through the transition groove, and the light-weight requirement of the secondary battery can be further met.
And, this top cap subassembly still includes the sealing member, and the sealing member holds in the transition groove, and the sealing member is connected with the cell wall of transition groove for the inner space of sealing member sealed transition groove can reduce the hydrops risk of transition groove, therefore can reduce the hydrops risk of post terminal in the top cap subassembly.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic external view of a top cover assembly according to an embodiment of the present disclosure;
FIG. 2 is an exploded view of the cap assembly of FIG. 1;
FIG. 3 is a longitudinal cross-sectional view of FIG. 1;
FIG. 4 is an enlarged partial schematic view of FIG. 3A;
fig. 5 is a schematic structural view of a post terminal of the cap assembly;
FIG. 6 is a schematic view of the mating of the post terminal of the cap assembly with the cap;
FIG. 7 is an enlarged partial schematic view of FIG. 6 at C;
reference numerals, 100-top cover sheet, 101-post through hole, 200-post terminal, 210-insertion section, 220-exposure section, 221-first end face, 222-second end face, 230-transition groove, 300-seal member, 400-cap, 410-protrusion, 500-upper plastic, 510-main body portion, 520-mating portion, 120-accommodation groove, 240-base body, 250-groove, 600-seal ring, 610-first seal portion, 620-second seal portion, 700-lower plastic sheet, 710-fitting hole, 720-protrusion, 730-limit groove, 800-explosion-proof valve assembly, 810-protective film, 820-explosion-proof valve, 830-mounting hole.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features.
The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application.
Referring to fig. 1 to 7, a top cover assembly is provided. The top cap assembly includes a top cap sheet 100, a post terminal 200, and a seal 300. The top cover sheet 100 is provided with a post through hole 101. The post terminal 200 includes an insertion section 210 and an exposure section 220, the insertion section 210 is provided with a transition groove 230, the insertion section 210 is inserted into the post through hole 101, the exposure section 220 is located at the periphery of the insertion section 210, and the exposure section 220 is connected with the surface of the top cover sheet 100 adjacent to the post through hole 101.
The top cover assembly forms the transition groove 230 on the pole terminal 200, and the exposed section 220 is formed by outwards rolling and flanging the skirt edge of the periphery of the transition groove 230, so that the exposed section 220 is overlapped on the top cover sheet 100 along the radial extension of the pole through hole 101. The inserting section 210 and the exposing section 220 are matched to form a self-riveting structure, so that riveting blocks in the prior art can be replaced to play a role in riveting, the structure of the top cover assembly can be simplified, the cost and the weight of the top cover assembly are obviously reduced, the space utilization rate is greatly improved, and the requirement of the secondary battery for lightening can be effectively met. In addition, the post terminal 200 in the present embodiment further includes a transition groove 230 provided in the insertion section 210, and the transition groove 230 can reduce the weight of the post terminal 200, and further can satisfy the requirement of light weight of the secondary battery.
It can be appreciated that, the design that the exposed section 220 extends along the radial direction of the pole through hole 101 and is overlapped on the top cover sheet 100 can realize the assembly of the pole terminal 200 and the top cover sheet 100, and the insulation design of the pole terminal 200 and the top cover sheet 100, if the pole terminal 200 lacks the flanging design of the exposed section 220 or the design of the exposed section 220 is unreasonable, the contact short circuit fault between the pole terminal 200 and the top cover sheet 100 will be easily caused, or the short circuit fault between the pole terminal 200 and the top cover sheet 100 will be easily caused when the pole terminal 200 falls from the inside of the pole through hole 101.
Also, the sealing member 300 is received in the transition groove 230, and the sealing member 300 is connected with a groove wall of the transition groove 230 such that the sealing member 300 seals an inner space of the transition groove 230. As shown in fig. 4, the seal 300 is disposed in the transition groove 230, and the seal 300 is used to seal the inner space of the transition groove 230, so that the risk of liquid accumulation in the transition groove 230 can be reduced, and thus the risk of liquid accumulation in the post terminal 200 in the top cover assembly can be reduced. If the seal 300 is not disposed in the transition groove 230, a problem of liquid accumulation is likely to occur in the transition groove 230, and there is a high risk of liquid accumulation in the post terminal 200.
In one embodiment, as shown in fig. 4 and 5, the exposed section 220 has a first end surface 221 and a second end surface 222 opposite to each other along the axial direction Z of the post through hole 101, the second end surface 222 is press-bonded to the surface of the top cover sheet 100 adjacent to the post through hole 101, and the second end surface 222 is connected with the top cover sheet 100 adjacent to the post through hole 101 in an insulating manner, so that the assembly of the post terminal 200 and the top cover sheet 100 is achieved. The shape of the post through hole 101 may be circular, elliptical, or the like.
In one embodiment, as shown in fig. 7, the top cap assembly further comprises a cap 400, the cap 400 comprising a cover portion and a protrusion 410 provided on a side of the cover portion facing the top cover sheet 100, the protrusion 410 being provided around a surface of the cap 400 facing the top cover sheet 100. The first end surface 221 is opposite to the cap 400, the cap portion covers the first end surface 221, and the protrusion 410 is inserted into the transition groove 230. The cap 400 is disposed on the first end surface 221, and the cap 400 presses the pole terminal 200 in the axial direction Z, so that the exposed section 220 of the pole terminal 200 is deformed and expanded in the radial direction to form a flanging structure.
Further, the protrusion 410 is engaged with the transition groove 230, and the sealing member 300 is provided between the protrusion 410 and the transition groove 230, and the protrusion 410 contacts with the sealing member 300 inside the transition groove 230 to eliminate the fit gap between the post terminal 200 and the protrusion 410 of the cap 400. The seal 300 is a rubber seal. The seal 300, i.e., the rubber seal, may eliminate the mating gap between the transition groove 230 and the protrusion 410. With the protrusion 410 inserted into the transition groove 230, the snap fit between the protrusion 410 and the transition groove 230 is achieved, and the press-connection fixing effect of the protrusion 410 on the top of the pole terminal 200 is achieved. Conversely, if the protrusion 410 is not disposed on the side of the cap 400 facing the first end surface 221, or if the transition groove 230 is not disposed between the exposed section 220 and the insertion section 210 of the post terminal 200, the positions of the cap 400 and the protrusion 410 cannot be positioned by the transition groove 230 when the cap 400 presses the post terminal 200, the position of the cap 400 pressed against the post terminal 200 may be shifted, so that the flanging structure formed when the cap 400 presses against the post terminal 200, i.e., the exposed section 220 is shifted, and the offset of the exposed section 220 may cause a short circuit of the post terminal 200; if the seal 300 is not disposed in the transition groove 230, the transition groove 230 of the post terminal 200 is likely to be assembled with the cap 400 with a gap therebetween, which may result in an unstable assembly.
In an embodiment, as shown in fig. 4 and 5, the post terminal 200 further includes a base 240, the base 240 is disposed at an end of the insertion section 210 away from the exposed section 220, the base 240 protrudes from the insertion section 210 along a radial direction of the post through hole 101, and a radial dimension of the base 240 along the post through hole 101 is greater than a radial dimension of the exposed section 220 along the post through hole 101; the exposed section 220, the inserted section 210 and the base 240 enclose a recess 250, the recess 250 holding the top sheet 100. The exposed section 220, the inserted section 210, and the base 240 are an integrally formed structure.
In an embodiment, as shown in fig. 4 and 7, the top cover assembly further includes an upper plastic 500, the upper plastic 500 includes a body portion 510 and a mating portion 520, the body portion 510 is disposed around the mating portion 520, the body portion 510 and the mating portion 520 are disposed on a side of the top cover sheet 100 near the exposed section 220, the mating portion 520 is clamped between the top cover sheet 100 and the exposed section 220 along an axial direction Z, and an edge of the exposed section 220 abuts against the body portion 510; the cover part of the cap 400 is pressed onto the body part 510 of the upper plastic 500 after covering the first end surface 221; the body portion 510 and the mating portion 520 are integrally formed. By sandwiching the plastic 500 between the exposed section 220 and the top cover sheet 100, insulation between the exposed section 220 and the top cover sheet 100 is realized, the supporting and buffering effects on the pole through hole 101 are increased, and the connection strength between all parts is ensured.
Further, in some embodiments, the mating portion 520 includes a concave-convex structure, the concave-convex structure abuts against the second end face 222, and the concave-convex structure is designed to increase the friction force between the second end face 222 and the mating portion 520, so as to increase the fixing assembly effect between the second end face 222 and the mating portion 520, and the exposed section 220 is not easy to slip on the mating portion 520 along the radial direction of the post through hole 101.
In an embodiment, as shown in fig. 4, the top cover sheet 100 is further provided with a receiving groove 120, the receiving groove 120 is disposed around the post through hole 101, and a side of the top cover sheet 100 facing the cap 400 is provided with the receiving groove 120; the upper plastic 500 is assembled in the accommodating groove 120, specifically, the body portion 510 and the mating portion 520 are both assembled in the accommodating groove 120. The accommodating groove 120 is used for accommodating the upper plastic 500, so that the upper plastic 500 is directly disposed on one side of the top cover 100 facing the cap 400, so that the height of the upper plastic 500 along the axial direction Z of the post through hole 101 is relatively small, the height from the exposed section 220 to the top cover 100 along the axial direction Z of the post through hole 101 after the upper plastic 500 is lapped is relatively small, and the overall height of the post terminal 200 is small. Conversely, if the storage groove 120 is not provided on the side of the top cover sheet 100 facing the cap 400, the overall height of the post terminal 200 in the axial direction Z of the post through hole 101 increases, and the space utilization of the top cover assembly is low.
In an embodiment, referring to fig. 4 and 7, the top cover assembly further includes a lower plastic piece 700, the lower plastic piece 700 is disposed on a side of the top cover 100 facing away from the exposed section 220, an assembly hole 710 is disposed on a side of the lower plastic piece 700 facing toward the exposed section 220, a bump 720 is disposed on a side of the lower plastic piece 700 facing away from the top cover 100, the bump 720 encloses to form a limiting slot 730, the limiting slot 730 is aligned with the assembly hole 710 along the axial direction Z, the insertion section 210 is disposed in the post through hole 101 and the assembly hole 710 in a penetrating manner, and the base 240 is assembled in the limiting slot 730 and abuts against the lower plastic piece 700.
Further, the bump 720 extends along the circumference of the base 240 to form a limit groove 730, and the bump 720 may specifically be a complete ring structure extending along the circumference of the base 240; the number of the bumps 720 is also plural, and the plural bumps 720 are sequentially spaced apart from each other along the circumferential direction of the substrate 240, which is not limited herein.
In an embodiment, as shown in fig. 4, the top cap assembly further includes a sealing ring 600, the sealing ring 600 includes a first sealing portion 610 and a second sealing portion 620, the second sealing portion 620 is disposed around the first sealing portion 610, the first sealing portion 610 extends in the post through hole 101 along the axial direction Z, the first sealing portion 610 is clamped between the insertion section 210 and the top cap piece 100, the second sealing portion 620 extends in the radial direction of the post through hole 101, the second sealing portion 620 is clamped between the base 240 and the top cap piece 100, and the first sealing portion 610 and the second sealing portion 620 are in an integrated structure. By disposing the first sealing portion 610 between the insertion section 210 and the top cover sheet 100 and disposing the second sealing portion 620 between the base 240 and the top cover sheet 100, the second sealing portion 620 is accommodated in the fitting hole 710, insulation of the insertion section 210 between the post through hole 101 and the top cover sheet 100 is achieved, insulation of the insertion section 210 from the top cover sheet 100 in the fitting hole 710 is achieved, and abutment of the base 240 against the lower plastic sheet 700 in the limiting groove 730 is achieved. Similarly, if the seal ring 600 is not designed, a short circuit between the post terminal 200 and the top cover sheet 100 is likely to occur, for example, if the first seal portion 610 is not arranged between the insertion section 210 and the top cover sheet 100, the insertion section 210 and the top cover sheet 100 are likely to contact each other, and if the second seal portion 620 is not arranged between the base 240 and the top cover sheet 100, the base 240 and the top cover sheet 100 are likely to contact each other, so that a short circuit is likely to occur. The seal ring 600 may be PFA, PPS, or fluororubber.
The present application also provides a secondary battery including: the battery cell is arranged in the shell, the top cover assembly is arranged on the shell and comprises the pole terminal 200, and the pole terminal 200 is connected with the battery cell. The secondary battery further comprises an explosion-proof valve assembly 800, the explosion-proof valve assembly 800 is mounted on the top cover sheet 100, the explosion-proof valve assembly 800 comprises a protective film 810, an explosion-proof valve 820 and a mounting hole 830, the mounting hole 830 is formed in the top cover sheet 100, the explosion-proof valve 820 is mounted between the top cover sheet 100 and the lower plastic 700, the explosion-proof valve 820 penetrates through the mounting hole 830, the protective film 810 is bonded on the top cover sheet 100 to cover the mounting hole 830, the mounting hole 830 is used for preventing explosion of the battery, the shape of the mounting hole 830 can be square, oval, runway-shaped and the like, and the shape of the protective film 810 can be square, oval, runway-shaped and the like.
The secondary battery can meet the problem of solving the light-weight requirement of the battery. The top cap assembly includes: a top cover sheet 100, the top cover sheet 100 being provided with a post through hole 101; the pole terminal 200, the pole terminal 200 includes an insertion section 210 and an exposure section 220, the insertion section 210 is provided with a transition groove 230, the insertion section 210 is penetrated in the pole through hole 101, the exposure section 220 is positioned at the periphery of the insertion section 210, and the exposure section 220 is connected with the surface of the top cover sheet 100 adjacent to the pole through hole 101; and a seal 300, the seal 300 being received in the transition groove 230, and the seal 300 being connected with a groove wall of the transition groove 230. The post terminal 200 is inserted into the post through hole 101 through the insertion section 210, and the exposed section 220 is overlapped on the top cover sheet 100 along the radial extension of the post through hole 101. The inserting section 210 and the exposing section 220 are matched to form a self-riveting structure, so that riveting blocks in the prior art can be replaced to play a role in riveting, the structure of the top cover assembly can be simplified, the cost and the weight of the top cover assembly are obviously reduced, the space utilization rate is greatly improved, and the requirement of the secondary battery for lightening can be effectively met.
Moreover, the insertion section 210 is provided with the transition groove 230, and the sealing member 300 is arranged in the transition groove 230, and the sealing member 300 is used for sealing the inner space of the transition groove 230, so that the risk of liquid accumulation of the transition groove 230 can be reduced, and the risk of liquid accumulation of the pole terminal 200 in the top cover assembly can be reduced.
The top cap assembly and the secondary battery provided by the embodiments of the present application are described in detail, and specific examples are applied in the present application to illustrate the principles and embodiments of the present application, and the description of the above embodiments is only used to help understand the technical solution and core ideas of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A header assembly, comprising:
a top cover sheet provided with a post through hole;
the pole terminal comprises an insertion section and an exposure section, the insertion section is provided with a transition groove, the insertion section is arranged in the pole through hole in a penetrating mode, the exposure section is positioned at the periphery of the insertion section, and the exposure section is connected with the surface of the top cover sheet adjacent to the pole through hole;
and the sealing piece is accommodated in the transition groove and is connected with the groove wall of the transition groove.
2. The cap assembly of claim 1, wherein the exposed section has a first end face and a second end face opposite each other in an axial direction of the post through hole, the second end face being crimped to the cap piece surface adjacent to the post through hole.
3. The header assembly of claim 2, further comprising a cap including a cover portion and a projection disposed on a side of the cover portion facing the header sheet, the cover portion covering the first end face, the projection being interposed in the transition groove.
4. The cap assembly of claim 2, wherein the post terminal further comprises a base disposed at an end of the insertion section remote from the exposed section, the insertion section, and the base enclosing to form a recess, the recess clamping the cap piece.
5. The header assembly of claim 2, further comprising an upper plastic comprising a body portion and a mating portion, the body portion disposed about the mating portion, the body portion and the mating portion disposed on a side of the header sheet adjacent the exposed section, the mating portion being clamped between the header sheet and the exposed section in the axial direction.
6. The top cap assembly of claim 5, wherein the top cap piece is further provided with a receiving groove disposed around the post through hole; the body part and the matching part are assembled in the accommodating groove.
7. The header assembly of claim 5, wherein the mating portion includes a relief structure that abuts the second end surface.
8. The top cap assembly of claim 4, further comprising a lower plastic sheet disposed on a side of the top cap sheet facing away from the exposed section, the lower plastic sheet having an assembly hole therein, the insert section being disposed through the assembly hole and the post through hole; the plastic sheet is equipped with the lug in one side of deviating from down the top cap piece, the lug encloses to close and forms the spacing groove, the spacing groove along the axial with the mounting hole intercommunication aligns, the base member assemble in the spacing groove and support down the plastic sheet.
9. The cap assembly of claim 4, further comprising a seal ring comprising a first seal portion and a second seal portion, the second seal portion disposed about the first seal portion, the first seal portion extending in the axial direction between the post through hole and the first seal portion being clamped between the insert section and the cap piece, the second seal portion extending in a radial direction of the post through hole and the second seal portion being clamped between the base and the cap piece.
10. A secondary battery, characterized by comprising: a housing, a battery cell and a cap assembly according to any one of claims 1-9, the battery cell being disposed within the housing, the cap assembly being disposed on the housing.
CN202320328956.9U 2023-02-17 2023-02-17 Top cap subassembly and secondary cell Active CN219350596U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024169154A1 (en) * 2023-02-17 2024-08-22 欣旺达动力科技股份有限公司 Top cover assembly and secondary battery

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN212366065U (en) * 2020-04-26 2021-01-15 东莞塔菲尔新能源科技有限公司 Battery top cap assembly structure
CN112234309A (en) * 2020-11-19 2021-01-15 常州瑞德丰精密技术有限公司 Secondary cell top cap subassembly and secondary cell
CN217405565U (en) * 2022-01-04 2022-09-09 湖北亿纬动力有限公司 Top cover assembly and battery
CN217691379U (en) * 2022-02-21 2022-10-28 欣旺达电动汽车电池有限公司 Top cover assembly and single battery
CN217606926U (en) * 2022-04-29 2022-10-18 江苏天合储能有限公司 Secondary cell top cap and secondary cell
CN219350596U (en) * 2023-02-17 2023-07-14 欣旺达电动汽车电池有限公司 Top cap subassembly and secondary cell

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024169154A1 (en) * 2023-02-17 2024-08-22 欣旺达动力科技股份有限公司 Top cover assembly and secondary battery

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