CN214589036U

CN214589036U - Lithium battery pole module and lithium battery top cover

Info

Publication number: CN214589036U
Application number: CN202120462184.9U
Authority: CN
Inventors: 周滢杰; 孙威
Original assignee: Suzhou Lingpai New Energy Technology Co ltd; Sichuan Xinminya Battery Technology Co Ltd; Hunan Lingpai New Energy Technology Co Ltd
Current assignee: Hunan Lingpai Energy Storage Technology Co ltd; Hunan Lingpai New Energy Research Institute Co ltd; Suzhou Lingpai New Energy Technology Co ltd; Hunan Lingpai New Energy Technology Co Ltd; Hengyang Lingpai New Energy Technology Co Ltd; Hunan Lead Power Dazhi Technology Inc
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2021-11-02
Anticipated expiration: 2031-03-03

Abstract

The application provides a lithium battery post module and lithium battery top cap belongs to power battery's technical field, and specific lithium battery post module includes utmost point post, parcel circle and sealing washer, and the parcel circle encircles in utmost point post periphery, and the parcel circle internal fixation has the support ring, and utmost point post places on the support ring, and the sealing washer is compressed tightly between the terminal surface of utmost point post and the terminal surface of support ring, and the clearance packing of utmost point post and parcel circle has the filler, packs the relative position who is used for fixed utmost point post and parcel circle. Through the processing scheme of this application, reduce the volume and the weight of utmost point post, and then reduce the whole weight of lithium cell top cap.

Description

Lithium battery pole module and lithium battery top cover

Technical Field

The application relates to the field of power batteries, in particular to a lithium battery pole module and a lithium battery top cover.

Background

Under the promotion of the market, the demand of the lithium ion power battery is increasing, and meanwhile, higher requirements are put on the energy density of the lithium ion power battery.

The existing lithium battery mainly comprises a shell, a top cover and a battery core, wherein a pole column for connecting an internal circuit and an external circuit is arranged on the top cover of the lithium battery, the size of the common pole column is large, the weight is relatively large, and the weight of the top cover of the lithium battery is heavy.

SUMMERY OF THE UTILITY MODEL

In view of this, the application provides a lithium cell utmost point post module and lithium cell top cap, has solved the heavier problem of lithium cell top cap among the prior art, the better energy density requirement that satisfies lithium ion power battery.

On the one hand, the lithium battery pole module provided by the application adopts the following technical scheme:

the utility model provides a lithium battery terminal module, includes utmost point post, parcel circle and sealing washer, the parcel circle encircles in utmost point post periphery, parcel circle internal fixation have with the support ring of the marginal butt of utmost point post terminal surface, utmost point post is placed on the support ring, the sealing washer is compressed tightly between the terminal surface of utmost point post and the terminal surface of support ring, the clearance packing of utmost point post and parcel circle has the filler, the filler is used for fixing the relative position of utmost point post and parcel circle.

Optionally, be equipped with the spacing ring on the inner wall of parcel circle, the inner circle of spacing ring supplies during utmost point post passes the spacing ring and gets into the parcel circle, be equipped with the dogtooth on the circumference lateral wall of utmost point post, be equipped with the recess that supplies the dogtooth to pass on the spacing ring, be equipped with the cavity between spacing ring and the support ring, cavity and recess intercommunication, so that the dogtooth is followed the recess gets into in the cavity.

Optionally, the convex teeth are provided with a plurality of convex teeth, and the convex teeth are uniformly distributed along the circumferential direction of the pole.

Optionally, the sealing ring includes a gasket compressed between the end face of the post and the end face of the support ring, and a positioning ring abutted against the inner wall of the support ring, and the gasket is fixedly connected to the positioning ring.

Optionally, the filler is formed by injection molding of electrically conductive polyphenylene sulfide.

On the other hand, the lithium battery top cap that this application provided adopts following technical scheme:

the utility model provides a lithium battery top cap, its includes apron, lower plastic board and anodal post module and negative pole post module, the apron is fixed under on the plastic board, anodal primary module and negative pole post module interval are fixed on the apron, anodal post module and negative pole post module are foretell utmost point post module.

Optionally, the cover plate is provided with through holes for embedding the anode column module and the cathode column module respectively.

Optionally, a supporting protrusion is arranged on the inner wall of the through hole, and after the pole module enters the through hole, the end face of the wrapping ring is abutted to the supporting protrusion.

Optionally, a limiting protrusion is arranged on the lower plastic plate and is abutted against the inner wall of the sealing ring.

Optionally, the pole module protrudes out of the cover plate, the wrapping ring exposes out of the cover plate, and the filler overflows from the wrapping ring and coats the periphery of the wrapping ring exposing out of the cover plate.

To sum up, the application comprises the following beneficial technical effects:

1. the utility model provides a lithium battery terminal module, includes utmost point post, parcel circle and sealing washer, the parcel circle encircles in utmost point post periphery, parcel circle internal fixation has the support ring, utmost point post places on the support ring, the sealing washer is compressed tightly between the terminal surface of utmost point post and the terminal surface of support ring, the clearance packing of utmost point post and parcel circle has the filler, the filler is used for fixing the relative position of utmost point post and parcel circle. The structure of the pole is changed, and the pole is modularized, so that the volume of the pole is reduced, and the weight of the pole is reduced; thereby achieving the purpose of reducing the weight of the top cover of the lithium battery;

2. the mode that the positive pole column module and the negative pole column module are embedded in the through hole is formed in the top cover, and the installation mode of the positive pole column and the negative pole column is changed, so that the overall quality of the top cover of the lithium battery is reduced;

3. after the pole module, the positive pole and the negative pole are injected in advance to form a modular pole, so that the cost of the injection-molded mold changing is reduced, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a lithium battery post module according to the present application;

FIG. 2 is an exploded view of a lithium battery post module according to the present application;

fig. 3 is a schematic cross-sectional structure view of a pole module according to the present application;

FIG. 4 is a schematic view of the overall structure of a lithium battery top cover according to the present application;

FIG. 5 is an exploded view of a lithium battery top cap according to the present application;

fig. 6 is a schematic view of the connection structure of the pole module, the cover plate and the lower plastic plate according to the present application.

Description of reference numerals: 1. a filler; 2. a pole column; 21. a convex tooth; 3. a seal ring; 31. a gasket; 32. a positioning ring; 4. wrapping a ring; 41. a support ring; 42. a limiting ring; 421. a groove; 422. a cavity; 5. a cover plate; 51. a through hole; 52. a support boss; 6. a plastic board is put down; 61. a limiting bulge; 7. a positive column module; 8. and a negative pole column module.

Detailed Description

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and the drawings only show the components related to the present application rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.

In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.

The embodiment of the application provides a lithium battery pole module.

As shown in fig. 1, 2 and 3, a lithium battery post module includes a post 2, a wrapping ring 4 and a sealing ring 3, the wrapping ring 4 surrounds the periphery of the post 2, and a support ring 41 abutting against the edge of the end face of the post 2 is fixed in the wrapping ring 4, in this embodiment, the support ring 41 and the wrapping ring 4 are integrally arranged, the support ring 41 is formed by inward flanging of the wrapping ring 4, and in other embodiments, the support ring 41 may also be welded on the inner wall of the wrapping ring 4; the post 2 enters the wrapping ring 4 and then is placed on the supporting ring 41, the sealing ring 3 is compressed between the end face of the post 2 and the end face of the supporting ring 41, the gap between the post 2 and the wrapping ring 4 is filled with filler 1, and the filler 1 is used for fixing the relative position of the post 2 and the wrapping ring 4.

As shown in fig. 2 and fig. 3, the filler 1 overflows from one end of the wrapping ring 4, where the pole 2 enters, and covers the end face and part of the side wall of the wrapping ring 4. The pole module is divided into a positive pole and a negative pole when being installed on a lithium battery top cover, the filler 1 on the pole module of the positive pole is formed by injection molding of conductive polyphenylene sulfide, and the filler 1 on the pole module of the negative pole is formed by injection molding of nonconductive polyphenylene sulfide.

The pole 2 is made of copper-aluminum composite board, and in other embodiments, the pole 2 can also be obtained in a copper-aluminum friction mode.

In this embodiment, the pole 2 is cylindrical, the wrapping ring 4 is a circular ring, and the support ring 41 is a circular ring, and in other embodiments, the inner ring of the support ring 41 may be other polygons; in other embodiments, the wrapping ring 4 may also be a square ring or other polygonal rings, the support ring 41 may be a square ring or other polygonal rings, the inner ring of the support ring 41 may also be circular, the wrapping ring 4 may wrap the post 2, and the support ring 41 may support the edge of the end face of the post 2. In other embodiments, the pole 2 may also be a square column, the wrapping ring 4 may be a circular ring, a square ring or a ring with other shapes, and the supporting ring 41 may be a circular ring, a square ring or another polygonal ring.

As shown in fig. 2 and 3, a limiting ring 42 is arranged on the inner wall of the wrapping ring 4, the limiting ring 42 and the supporting ring 41 are respectively arranged at two ends of the wrapping ring 4, the inner ring of the limiting ring 42 is used for enabling the pole 2 to pass through the limiting ring 42 and then enter the wrapping ring 4, protruding teeth 21 are integrally arranged on the circumferential side wall of the pole 2, a groove 421 for enabling the protruding teeth 21 to pass through is arranged on the limiting ring 42, a cavity 422 is arranged between the limiting ring 42 and the supporting ring 41, and the cavity 422 is communicated with the groove 421, so that the protruding teeth 21 enter the cavity 422 from the groove 421.

When the wrapping ring 4 and the pole 2 are assembled, the sealing ring 3 is placed on the support ring 41; then, the convex teeth 21 are aligned with the grooves 421, the convex teeth 21 penetrate through the grooves 421, the pole 2 penetrates through the limiting ring 42 and then abuts against the supporting ring 41, then the pole 2 is rotated, the convex teeth 21 enter the cavity 422 from the grooves 421, the convex teeth 21 are located between the limiting ring 42 and the supporting ring 41, finally, injection molding of conductive polyphenylene sulfide is carried out, gaps between the wrapping ring 4 and the pole 2 are filled with the conductive polyphenylene sulfide, and the end face and part of the side wall of the wrapping ring 4 are wrapped. The convex teeth 21 are limited by the limiting ring 42 and the supporting ring 41 to move, so that the connection stability of the post 2 and the wrapping ring 4 after injection molding can be improved.

As shown in fig. 2, the plurality of teeth 21 are provided, and the teeth 21 are uniformly distributed along the circumferential direction of the pole 2. In this embodiment, eight teeth 21 are provided, and in other embodiments, other numbers such as two, three, six, ten, etc. may be provided. The corresponding grooves 421 on the limiting ring 42 are also provided with the same number as the convex teeth 21, the grooves 421 are formed on the limiting ring 42 through slotting, and the solid parts without slotting on the limiting ring 42 and the supporting ring 41 form cavities 422 for accommodating the convex teeth 21. In this embodiment, the limiting ring 42 is formed by inward flanging of the wrapping ring 4, and in other embodiments, the limiting ring 42 may be welded on the inner wall of the wrapping ring 4.

As shown in fig. 3, the seal ring 3 includes a washer 31 pressed between the end surface of the pole 2 and the end surface of the support ring 41, and a positioning ring 32 abutting against the inner wall of the support ring 41, and the washer 31 and the positioning ring 32 are fixedly connected. In this embodiment, the gasket 31 and the positioning ring 32 are integrally provided, so that the cross section of the seal ring 3 is L-shaped. The abutment of the positioning ring 32 against the inner wall of the support ring 41 improves the stability of the seal ring 3 on the support ring 41 and also improves the sealing performance of the pole module at the connection position between the support ring 41 and the pole 2. In the present embodiment, the material of the seal ring 3 is fluororubber, but in other embodiments, it may be other rubbers.

Through 2 modularization with utmost point post, reduce the volume of utmost point post 2 to reduce the weight of utmost point post 2, reach the purpose that alleviates lithium cell top cap weight. And the modularized polar post 2 can more efficiently process and produce the polar post 2.

The embodiment of the application also discloses a lithium battery top cover.

As shown in fig. 4 and 5, a lithium battery top cover comprises a cover plate 5, a lower plastic plate 6, an anode post module 7 and a cathode post module 8, wherein the cover plate 5 is fixed on the lower plastic plate 6, the cover plate 5 is a smooth aluminum sheet, the smooth aluminum sheet is clamped on the lower plastic plate 6, and the anode post module 7 and the cathode post module 8 are fixed on the cover plate 5 at intervals.

As shown in fig. 5 and 6, the positive post module 7 and the negative post module 8 are both the above-mentioned post modules, the cover plate 5 is provided with through holes 51 for embedding the positive post module 7 and the negative post module 8, the post modules are embedded in the through holes 51, and the wrapping rings 4 of the post modules are welded on the cover plate 5 by laser welding. Compare among the traditional mode with utmost point post 2 direct injection moulding on apron 5, with utmost point post module welding on apron 5, improve the reliability that utmost point post 2 and apron 5 are connected. And the modularized polar post 2 is injected in advance, so that the cost of the mold changing mold is reduced.

As shown in fig. 5 and 6, after the positive electrode post module 7 and the negative electrode post module 8 are assembled on the cover plate 5, the electrode post module protrudes out of the cover plate 5, the wrapping ring 4 is exposed out of the cover plate 5, and the part of the filler 1 which overflows the wrapping ring 4 just wraps the part of the electrode post module which is exposed out of the cover plate 5.

As shown in fig. 5 and 6, in order to facilitate positioning of the negative pole post module 8 and the positive pole post module 7 when assembling the cover plate 5 and the pole post module, the inner wall of the through hole 51 is provided with a support protrusion 52 to form a platform hole, and after the pole post module enters the through hole 51, the end surface of the wrapping ring 4 abuts against the support protrusion 52, in this embodiment, the support protrusion 52 is an annular support sheet, the inner diameter of the annular support sheet is consistent with the inner diameter of the support ring 41, and the support protrusion 52 and the cover plate 5 are integrally arranged; in other embodiments, the supporting protrusion 52 may be a plurality of protrusions distributed in a ring shape to form a support for the pole module. Meanwhile, the supporting protrusions 52 can also increase the contact area between the pole module and the cover plate 5, facilitate the welding between the pole module and the cover plate 5, and improve the connection reliability.

As shown in fig. 5 and 6, the lower plastic plate 6 is provided with a limiting protrusion 61, and the limiting protrusion 61 abuts against the inner wall of the sealing ring 3. In this embodiment, the limit protrusion 61 is an annular protrusion edge, the limit protrusion 61 and the lower plastic plate 6 are integrally arranged, and the outer wall of the annular protrusion edge is abutted to the inner wall of the positioning ring 32 of the sealing ring 3, so that the sealing effect of the sealing ring 3 can be enhanced.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a lithium battery post module, its characterized in that, includes utmost point post, parcel circle and sealing washer, the parcel circle encircles in utmost point post periphery, parcel circle internal fixation have with the support ring of the edge butt of utmost point post terminal surface, utmost point post places on the support ring, the sealing washer is compressed tightly between the terminal surface of utmost point post and the terminal surface of support ring, utmost point post and the clearance packing of parcel circle have the filler, the filler is used for fixing the relative position of utmost point post and parcel circle.

2. The lithium battery post module as claimed in claim 1, wherein a limiting ring is disposed on the inner wall of the wrapping ring, the post is provided with an inner ring for the post to pass through the limiting ring and enter the wrapping ring, a protruding tooth is disposed on the circumferential side wall of the post, a groove for the protruding tooth to pass through is disposed on the limiting ring, a cavity is disposed between the limiting ring and the support ring, and the cavity is communicated with the groove, so that the protruding tooth enters the cavity from the groove.

3. The lithium battery post module as claimed in claim 2, wherein the protruding teeth are provided in plurality, and are uniformly distributed along the circumference of the post.

4. The lithium battery post module as claimed in claim 1, wherein the sealing ring comprises a gasket compressed between the end surface of the post and the end surface of the support ring, and a positioning ring abutting against the inner wall of the support ring, and the gasket and the positioning ring are fixedly connected.

5. The lithium battery post module of claim 1, wherein the filler is injection molded from electrically conductive polyphenylene sulfide.

6. A lithium battery top cover, comprising a cover plate, a lower plastic plate, and a positive pole module and a negative pole module, wherein the cover plate is fixed on the lower plastic plate, the positive pole module and the negative pole module are fixed on the cover plate at intervals, and the positive pole module and the negative pole module are the pole modules of any one of claims 1 to 5.

7. The lithium battery top cap of claim 6, wherein the cover plate is provided with through holes for embedding the positive pole module and the negative pole module respectively.

8. The lithium battery top cap of claim 7, wherein the through hole is provided with a support protrusion on an inner wall thereof, and after the pole module enters the through hole, the end surface of the wrapping ring is abutted against the support protrusion.

9. The lithium battery top cap of claim 6, wherein the lower plastic plate is provided with a limiting protrusion, and the limiting protrusion abuts against the inner wall of the sealing ring.

10. The lithium battery top cap of claim 7, wherein the post module protrudes out of the cover plate, and the wrapping ring exposes out of the cover plate, and the filler overflows from the wrapping ring and wraps the outer periphery of the wrapping ring exposing out of the cover plate.