CN210200769U - Power battery top cover structure and power battery - Google Patents
Power battery top cover structure and power battery Download PDFInfo
- Publication number
- CN210200769U CN210200769U CN201921422029.3U CN201921422029U CN210200769U CN 210200769 U CN210200769 U CN 210200769U CN 201921422029 U CN201921422029 U CN 201921422029U CN 210200769 U CN210200769 U CN 210200769U
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- Prior art keywords
- top cover
- mounting hole
- piece
- power battery
- negative pole
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- 230000007306 turnover Effects 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 8
- 239000003792 electrolyte Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 9
- 238000002955 isolation Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 11
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a power battery top cap structure and power battery belongs to the battery technology field, including the top cap piece, upset piece mounting hole and negative pole mounting hole have been seted up to the same end of top cap piece, are provided with the upset piece in the upset piece mounting hole, wear to be equipped with negative pole utmost point post in the negative pole mounting hole, are provided with negative pole insulating seal circle between the inner wall of negative pole utmost point post and negative pole mounting hole; the negative pole clamping ring is sleeved on the negative pole post and is provided with an extension plate which extends outwards and is positioned above the turnover piece, the extension plate is bent at a position corresponding to the turnover piece to form a contact part, and the turnover piece can be abutted to the contact part after the turnover piece is turned. Can adjust the distance between negative pole clamping ring and the upset piece under the prerequisite of guaranteeing negative pole clamping ring and top cap piece insulation isolation for the upset piece can take place to overturn and can support after the upset to press on the contact site, guarantees the good contact of upset piece and contact site, avoids contact failure's phenomenon to appear, reduces the potential safety hazard.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a power battery top cap structure and power battery.
Background
With the development of modern society and the enhancement of environmental protection consciousness of people, more and more devices select lithium batteries as power supplies, such as mobile phones, notebook computers, electric tools, electric automobiles and the like, and a wide space is provided for the application and development of the lithium batteries. Among them, lithium batteries used in electric tools, electric vehicles, and the like are generally called power batteries.
In order to meet the use standard and meet the use requirements of people, the power battery has high capacity, good safety performance and long cycle life. The safety of the power battery is mainly reflected in how to avoid fire or explosion caused by overcharging of the power battery. When the power battery is overcharged, gas can be continuously generated in the power battery, the internal gas pressure of the power battery is rapidly increased, and serious safety accidents can be caused if the over-charging and gas generation of the battery are not prevented in time.
In order to solve the problem of overcharging of the power battery, the top cover of the power battery is often provided with an overturning sheet at present, but the overturning sheet is not provided with a boss or is only provided with a small boss, so that the overturning sheet is easy to form point contact and line contact with a conducting sheet after overturning to cause poor contact, or the overturning sheet is inclined after overturning, and the poor contact with the conducting sheet is also caused, and potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power battery top cap structure to appear after the upset piece upset that exists among the solution prior art with conducting strip contact failure, there is the technical problem of potential safety hazard.
As the conception, the utility model adopts the technical proposal that:
a power cell header structure, comprising:
the device comprises a top cover plate, a bottom cover plate and a cathode, wherein the same end of the top cover plate is provided with an overturning plate mounting hole and a cathode mounting hole, an overturning plate is arranged in the overturning plate mounting hole, a cathode pole is arranged in the cathode mounting hole in a penetrating manner, and a cathode insulating sealing ring is arranged between the cathode pole and the inner wall of the cathode mounting hole;
the negative pole clamping ring is sleeved on the negative pole post and is provided with an extension plate which extends outwards and is arranged above the turnover piece, the extension plate is bent at a position corresponding to the turnover piece to form a contact part, and the turnover piece can be abutted to the contact part after being turned.
Further, the negative pole clamping ring is located including the cover the loop configuration on the negative pole utmost point post and connect in the loop configuration extend the board in the thickness direction, it is less than to extend the board thickness of loop configuration.
Furthermore, the turnover sheet comprises a convex part and a turnover part surrounding the convex part, and the cross section area of the convex part is smaller than that of the contact part along the axial direction of the turnover sheet mounting hole.
Further, along the axial direction of the turnover piece mounting hole, the cross sections of the convex part and the contact part are both circular, and the convex part and the contact part are coaxial.
Further, power battery top cap structure still includes plastic on the negative pole, plastic cladding in on the negative pole clamping ring on the negative pole, plastic is configured as right on the negative pole clamping ring with the top cap piece carries out the insulation and keeps apart.
Furthermore, an anode mounting hole is formed in one end, far away from the cathode mounting hole, of the top cover sheet, and a first annular groove surrounding the cathode mounting hole and a second annular groove surrounding the anode mounting hole are formed in the top cover sheet.
Further, power battery top cap structure is still including insulating plastic down, insulating lower plastic set up in the top cap piece deviates from one side of negative pole clamping ring, be provided with positioning groove under the insulation on the plastic, the top cap piece be provided with positioning groove matched with location is protruding.
Furthermore, a liquid injection hole is formed in the top cover sheet, a mesh groove structure is arranged at the position, opposite to the liquid injection hole, of the insulating lower plastic, and mesh holes for electrolyte to flow through are formed in the mesh groove structure.
Furthermore, protruding shelves strips are arranged at both ends of one side of the insulating lower plastic deviating from the top cover plate in the width direction in an outward protruding manner, extend along the length direction of the insulating lower plastic, and are configured to abut against the insulating film at the top of the battery core.
In order to achieve the purpose, the utility model also provides a power battery, including the aforesaid power battery top cap structure.
The utility model has the advantages that:
the utility model provides a power battery top cap structure, through set up the extension board on the negative pole clamping ring, the position bending type contact site that extension board and upset piece correspond can be under the prerequisite of guaranteeing negative pole clamping ring and top cap piece insulation isolation, adjust the distance between negative pole clamping ring and the upset piece to make the upset piece can take place to overturn and can support after the upset and press on the contact site, guarantee the good contact of upset piece and contact site, avoid appearing contact failure's phenomenon, reduce the potential safety hazard.
The utility model provides a power battery has above-mentioned power battery top cap structure, guarantees that the upset piece can take place to overturn and contact with negative pole clamping ring is stable after the upset to make power battery's positive pole and negative pole connect and the short circuit, reduce the installation hidden danger.
Drawings
Fig. 1 is a schematic view of a partial structure of a top cover of a power battery provided by the present invention;
fig. 2 is a schematic view of a partial structure of a top cover of a power battery provided by the present invention;
fig. 3 is a schematic structural view of the insulating lower plastic according to the present invention.
In the figure:
1. a top cover sheet; 11. a liquid injection hole; 121. a first annular groove; 122. a second annular groove; 2. insulating lower plastic cement; 21. a mesh groove structure; 211. mesh openings; 22. a raised stop strip; 3. turning over the sheet; 31. a turning part; 32. a boss portion; 41. a negative electrode post; 42. a negative electrode insulating seal ring; 43. a negative electrode compression ring; 431. a cyclic structure; 432. an extension plate; 4321. a contact portion; 44. plastic is coated on the negative electrode; 51. a positive pole column; 52. a positive electrode insulating seal ring; 53. a positive electrode compression ring; 54. plastic is coated on the positive electrode; 6. and sealing the plastic nail.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1 to fig. 3, the present embodiment provides a power battery, which includes a casing, a battery cell, and a power battery top cover structure, where the casing is a cylindrical structure with an opening at one end, specifically, in the present embodiment, the casing is a square cylindrical structure, the battery cell is located in the casing, the power battery top cover structure is covered on the end of the casing with the opening, and the power battery top cover structure is connected to a positive electrode and a negative electrode of the battery cell.
As shown in fig. 1 and fig. 2, the present embodiment provides a power battery top cover structure, which includes a top cover sheet 1, the top cover sheet 1 is a rectangular plate-shaped structure, negative electrode mounting holes and positive electrode mounting holes are respectively provided at two ends of the top cover sheet 1, and a liquid injection hole 11 and a flip sheet mounting hole which are located between the positive electrode mounting holes and the negative electrode mounting holes, the flip sheet mounting hole and the negative electrode mounting holes are located at the same end of the top cover sheet 1. The turnover sheet 3 is arranged in the turnover sheet mounting hole, and both the turnover sheet 3 and the anode pole 51 are electrically connected to the top cover sheet 1. The negative pole mounting hole is internally provided with a negative pole post 41 in a penetrating way, a negative pole insulating sealing ring 42 is arranged between the negative pole post 41 and the inner wall of the negative pole mounting hole, and the negative pole insulating sealing ring 42 is used for insulating and isolating the negative pole post 41 and the top cover plate 1.
This power battery top cap structure still includes negative pole clamping ring 43, and negative pole clamping ring 43 cover is located on negative pole utmost point post 41, and negative pole clamping ring 43 has the extension board 432 that outwards extends the setting and be located upset piece 3 top, and the portion bending type that extension board 432 and upset piece 3 correspond becomes contact site 4321, and after upset piece 3 overturns, upset piece 3 can support and press in contact site 4321, and anodal utmost point post 51 and negative pole utmost point post 41 electricity are connected and are leaded to the short circuit this moment. Specifically, the negative electrode pressure ring 43 includes an annular structure 431 sleeved on the negative electrode post 41 and an extension plate 432 connected to the annular structure 431, and the negative electrode pressure ring 43 is made of a conductive metal material and is electrically connected to the negative electrode post 41, so that when the air pressure inside the battery reaches a preset value, the turnover piece 3 turns over and presses against the contact portion 4321 to electrically connect the top cover piece 1 and the negative electrode post 41 (the positive electrode post 51 is electrically connected to the top cover piece 1), so that the positive electrode and the negative electrode of the power battery are connected to generate a short circuit, thereby reducing potential safety hazards and improving the safety of the power battery.
By providing the extension plate 432 to the negative electrode pressing ring 43, the contact portion 4321 is formed by bending the extension plate 432 and the inversion sheet 3, and when the distance between the extension plate 432 and the inversion sheet 3 is large, the contact portion 4321 is formed by bending the portion of the extension plate 432 corresponding to the inversion sheet 3 in the direction approaching the inversion sheet 3, as shown in fig. 1. When the distance between extension panel 432 and the upset piece 3 is less, the position that extension panel 432 corresponds with the upset piece is to keeping away from the direction bending type contact site 4321 of upset piece 3, can be under the prerequisite of guaranteeing negative pole clamping ring 43 and top cover piece 1 insulation isolation, adjust the distance between extension panel 432 and the upset piece 3, thereby make upset piece 3 can take place to overturn and can support after the upset and press on contact site 4321, guarantee upset piece 3 and contact site 4321's good contact, avoid appearing the phenomenon of contact failure, reduce the potential safety hazard.
Further, in the present embodiment, in the thickness direction of the extension plate 432, the thickness of the extension plate 432 is smaller than the thickness of the ring structure 431. Negative pole clamping ring 43 generally adopts the welded mode to connect in negative pole post 41, and negative pole clamping ring 43 adopts above-mentioned structure can increase the welding area of annular structure 431 and negative pole post 41 on the one hand, improves the welding strength of annular structure 431 and negative pole post 41, and on the other hand can reduce the material quantity of negative pole clamping ring 43, reduce cost. In addition, in this embodiment, the negative electrode pressing ring 43 is integrally formed by a stamping process, which can reduce the assembly time of the parts and ensure that the negative electrode pressing ring 43 has better structural strength.
As shown in fig. 1, the turning sheet 3 includes a turning portion 31 and a protruding portion 32 connected to each other, the turning portion 31 is disposed around the protruding portion 32, and the turning sheet 3 is a common structure in the prior art and is not described in detail herein. The cross-sectional area of the convex part 32 is smaller than that of the contact part 4321 along the axial direction of the mounting hole of the turning sheet, and the arrangement mode ensures that the convex part 32 of the turning sheet 3 can keep good contact with the contact part 4321 when the turning sheet 3 turns. In addition, in this embodiment, along the axial direction of the turning sheet mounting hole, the cross sections of the protruding portion 32 and the contact portion 4321 are both circular, the protruding portion 32 and the contact portion 4321 are coaxial, and one side of the protruding portion 32 facing the contact portion 4321 is provided with a first contact plane, and the contact portion 4321 is provided with a second contact plane matched with the first contact plane.
As shown in fig. 1, the top cap structure of the power battery provided in this embodiment further includes an upper negative plastic 44, the upper negative plastic 44 covers the negative pressure ring 43, and the upper negative plastic 44 is used for insulating and isolating the negative pressure ring 43 and the top cover plate 1, but does not block the contact between the flip plate 3 and the contact portion 4321. Specifically, in the present embodiment, the negative electrode upper plastic 44 is formed by over-molding and injection molding and covers the negative electrode pressure ring 43.
As shown in fig. 2, a positive pole post 51 is installed in the positive pole mounting hole of the top cover plate 1, the positive pole post 51 is electrically connected with the top cover plate 1, a positive pole insulating seal ring 52 is arranged between the positive pole post 51 and the positive pole mounting hole, a positive pole press ring 53 is arranged at one end of the positive pole post 51 extending out of the casing, the positive pole press ring 53 is also connected to the positive pole post 51 through welding, and a positive pole upper plastic 54 is arranged between the positive pole press ring 53 and the top cover plate 1.
With continued reference to fig. 1 and 2, in order to avoid the electrolyte flowing out from the liquid injection hole 11 to corrode the negative insulating seal ring 42 and the positive insulating seal ring 52 during liquid injection, the top cover plate 1 is provided with a first annular groove 121 surrounding the negative mounting hole and a second annular groove 122 surrounding the positive mounting hole, and by providing the annular grooves, the electrolyte on the top cover plate 1 can be blocked and collected, so that the electrolyte is prevented from flowing into the negative mounting hole and the positive mounting hole, and the negative insulating seal ring 42 and the positive insulating seal ring 52 are protected. In addition, the turning piece mounting hole is located in the first annular groove 121 surrounding the negative electrode mounting hole, thereby preventing the electrolyte from corroding the turning piece 3.
As shown in fig. 1 to fig. 3, the top cover structure of the power battery provided in this embodiment further includes an insulating lower plastic 2, the insulating lower plastic 2 is disposed on one side of the top cover plate 1 departing from the negative electrode clamping ring 43, a positioning groove (not shown in the figure) is disposed on the insulating lower plastic 2, and a positioning protrusion (not shown in the figure) matched with the positioning groove is disposed on the top cover plate 1. Through setting up location arch and positioning groove, can fix a position both when plastic 2 assembles under top cap piece 1 and the insulation, the equipment of plastic 2 under the top cap piece 1 of being convenient for and the insulation.
In addition, a mesh groove structure 21 is arranged at the position of the insulating lower plastic 2 opposite to the liquid injection hole 11, and a mesh hole 211 for flowing the electrolyte is arranged on the mesh groove structure 21. Specifically, the position of the insulating lower plastic 2 opposite to the liquid injection hole 11 is provided with a liquid through hole, the mesh groove structure 21 is arranged opposite to the liquid through hole, the mesh groove structure 21 is a cylindrical structure with an opening at one end, the open end of the cylindrical structure is connected to the inner wall of the liquid through hole, and the closed end of the cylindrical structure is provided with the mesh 211.
After annotating the liquid and accomplishing, adopt sealed plastic nail 6 will annotate liquid hole 11 and seal usually, through setting up wire groove structure 21, seted up mesh 211 on the wire groove structure 21, can not influence the injection of electrolyte, can prevent moreover that sealed plastic nail 6 from breaking away from annotating liquid hole 11 unusually and falling into in the casing, improve power battery's security performance.
In order to protect the electric core and to insulate between electric core and the power battery top cover structure, insulate between electric core and the casing, generally in the direction of height of electric core, in two sides of electric core thickness direction, cladding one deck insulating film on electric core top surface and the bottom surface, after putting into the casing with electric core, generally need apply certain pressure and pack the top cover into the casing, and with the marginal parallel and level of casing in order to be welded, in the in-process of exerting pressure to the top cover, power battery top cover structure can support and press electric core and make the insulating film take place to warp, make the insulating film and the welding position contact of top cover and casing easily, consequently when follow-up laser welding is carried out to top cover and casing, the high temperature that laser welding produced can make the insulating film melt, lead to the welding explosion point and reduce welding quality, power battery.
In order to solve the above problem, as shown in fig. 3, protruding stopping strips 22 are convexly provided at both ends of one side of the insulating lower plastic 2 departing from the top cover plate 1 in the width direction, and the protruding stopping strips 22 extend along the length direction of the insulating lower plastic 2. After power battery top cap structure lid was established on the casing, protruding shelves strip 22 supported to press on being located electric core top and the insulating film of electric core top width direction upper both sides, restriction insulating film's deformation avoids the insulating film to warp at will and contacts with the welding position of top cap piece 1 and casing 1 to reduce the welding defective rate, improve welding quality, improve power battery's production yields. In addition, in order to avoid the protruding stop strip 22 occupying too much space to affect the energy density of the battery cell, in the thickness direction of the plastic 2 under insulation, the length of the protruding stop strip 22 is smaller than the maximum distance between the second surface and the top surface of the battery cell. Specifically, in this embodiment, in the thickness direction of the insulating lower plastic 2, the length of the protruding stop bar 22 is slightly smaller than the maximum distance between the second surface and the top surface of the battery cell, so that the protruding stop bar 22 can abut against the insulating film to avoid the insulating film from deforming at will, but the protruding stop bar 22 does not abut against the battery cell to avoid the protruding stop bar 22 from occupying the space of the battery cell and affecting the energy density of the battery cell.
In summary, in the top cover structure of the power battery provided in this embodiment, the extension plate 432 is disposed on the negative electrode pressing ring 43, and the portion of the extension plate 432 corresponding to the flipping sheet 3 is bent to form the contact portion 4321, so that the distance between the negative electrode pressing ring 43 and the flipping sheet 3 can be adjusted on the premise of ensuring the insulation and isolation between the negative electrode pressing ring 43 and the top cover plate 1, that is, when the distance between the negative electrode pressing ring 43 and the flipping sheet 3 is large, the bending degree of the extension plate 432 toward the flipping sheet 3 can be increased, and when the distance between the negative electrode pressing ring 43 and the flipping sheet 3 is small, the bending degree of the extension plate 432 toward the flipping sheet 3 or the extension plate 432 is bent in a direction away from the flipping sheet 3 can be decreased, so as to adjust the distance between the contact portion 4321 and the flipping sheet 3, and the flipping sheet 3 can be pressed against the contact portion 4321 after being flipped, thereby ensuring good contact between the flipping, the phenomenon of poor contact is avoided, and the potential safety hazard is reduced.
The power battery that this embodiment provided has above-mentioned power battery top cap structure, can guarantee that upset piece 3 is taking place the upset and after the upset with negative pole clamping ring 43 stable contact to make power battery's positive pole and negative pole connect and the short circuit, reduce the installation hidden danger.
The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A power battery top cap structure, characterized by includes:
the cathode structure comprises a top cover plate (1), wherein the same end of the top cover plate (1) is provided with an overturning plate mounting hole and a cathode mounting hole, an overturning plate (3) is arranged in the overturning plate mounting hole, a cathode pole (41) penetrates through the cathode mounting hole, and a cathode insulating sealing ring (42) is arranged between the cathode pole (41) and the inner wall of the cathode mounting hole;
negative pole clamping ring (43), the cover is located on negative pole utmost point post (41), and have and outwards extend the setting and be located extension board (432) of upset piece (3) top, extension board (432) with the position bending type that upset piece (3) correspond becomes contact site (4321), works as after upset piece (3) upset, upset piece (3) can support press in contact site (4321).
2. The top cover structure of the power battery is characterized in that the negative electrode pressing ring (43) comprises an annular structure (431) sleeved on the negative electrode post (41) and an extension plate (432) connected to the annular structure (431), and the thickness of the extension plate (432) is smaller than that of the annular structure (431) in the thickness direction of the extension plate (432).
3. The top cover structure of the power battery according to claim 1, wherein the turning sheet (3) comprises a convex portion (32) and a turning portion (31) arranged around the convex portion (32), and the cross-sectional area of the convex portion (32) is smaller than that of the contact portion (4321) along the axial direction of the mounting hole of the turning sheet.
4. The top cover structure of the power battery as claimed in claim 3, wherein the cross sections of the convex part (32) and the contact part (4321) are circular along the axial direction of the turnover sheet mounting hole, and the convex part (32) and the contact part (4321) are coaxial.
5. The power battery top cover structure according to claim 1, further comprising an upper negative plastic (44), wherein the upper negative plastic (44) is coated on the negative pressure ring (43), and the upper negative plastic (44) is configured to insulate and isolate the negative pressure ring (43) and the top cover sheet (1).
6. The top cover structure of the power battery is characterized in that one end, far away from the negative pole mounting hole, of the top cover sheet (1) is provided with a positive pole mounting hole, and the top cover sheet (1) is provided with a first annular groove (121) surrounding the negative pole mounting hole and a second annular groove (122) surrounding the positive pole mounting hole.
7. The power battery top cover structure according to claim 1, further comprising lower insulating plastic (2), wherein the lower insulating plastic (2) is arranged on one side, away from the negative electrode compression ring (43), of the top cover piece (1), a positioning groove is formed in the lower insulating plastic (2), and a positioning protrusion matched with the positioning groove is formed in the top cover piece (1).
8. The top cover structure of the power battery according to claim 7, wherein the top cover sheet (1) is provided with a liquid injection hole (11), a mesh groove structure (21) is arranged at a position of the lower insulating plastic (2) opposite to the liquid injection hole (11), and mesh holes (211) for electrolyte to flow through are formed in the mesh groove structure (21).
9. The top cover structure of the power battery according to claim 7 or 8, wherein a protruding stopping strip (22) is convexly arranged at both ends of one side of the insulating lower plastic (2) departing from the top cover sheet (1) in the width direction, the protruding stopping strip (22) extends along the length direction of the insulating lower plastic (2), and the protruding stopping strip (22) is configured to abut against an insulating film on the top of the battery core.
10. A power cell comprising a power cell top cover structure according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921422029.3U CN210200769U (en) | 2019-08-29 | 2019-08-29 | Power battery top cover structure and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921422029.3U CN210200769U (en) | 2019-08-29 | 2019-08-29 | Power battery top cover structure and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210200769U true CN210200769U (en) | 2020-03-27 |
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ID=69865182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921422029.3U Active CN210200769U (en) | 2019-08-29 | 2019-08-29 | Power battery top cover structure and power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210200769U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115498332A (en) * | 2022-10-10 | 2022-12-20 | 中天储能科技有限公司 | Cover plate assembly and energy storage device |
| WO2024060528A1 (en) * | 2022-09-20 | 2024-03-28 | 湖北亿纬动力有限公司 | Top cover assembly and battery |
-
2019
- 2019-08-29 CN CN201921422029.3U patent/CN210200769U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024060528A1 (en) * | 2022-09-20 | 2024-03-28 | 湖北亿纬动力有限公司 | Top cover assembly and battery |
| CN115498332A (en) * | 2022-10-10 | 2022-12-20 | 中天储能科技有限公司 | Cover plate assembly and energy storage device |
| CN115498332B (en) * | 2022-10-10 | 2024-03-26 | 中天储能科技有限公司 | Cover plate assembly and energy storage device |
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