CN218731352U

CN218731352U - End cover assembly and battery

Info

Publication number: CN218731352U
Application number: CN202223058094.7U
Authority: CN
Inventors: 孔潇; 徐永刚; 曹星宇
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-03-24
Anticipated expiration: 2032-11-17

Abstract

The utility model provides an end cover subassembly and battery belongs to battery technical field, and this end cover subassembly includes: end cap, seal assembly and elastic component. The end cover is provided with a liquid injection hole for injecting electrolyte; the sealing assembly is arranged on the liquid injection hole and seals the liquid injection hole from one side of the end cover close to the battery core; the elastic piece is connected with the sealing assembly, and when the elastic piece receives an acting force from one side far away from the battery cell to one side close to the battery cell, the sealing assembly is driven to open the liquid injection hole. The utility model discloses an end cover assembly, simple structure is clear, and convenient operation is swift, can utilize the elasticity characteristic that resets of elastic component, guarantees on the battery case that annotates liquid hole deblocking and encapsulated situation's free switching under the prerequisite that need not to dismantle spare part to realize the liquid supplementation many times to the battery.

Description

End cover assembly and battery

Technical Field

The utility model relates to a battery technology field, concretely relates to end cover subassembly and battery.

Background

In the field of energy storage batteries, the electrolyte is used as a vital component of the battery to play a role in conducting electrons between a positive electrode and a negative electrode in the battery, and is a guarantee for the energy storage battery to obtain the advantages of high voltage, high specific energy and the like. Along with the increase of the service time of the battery, the electrolyte in the energy storage battery can be gradually consumed, and the service life of the battery is further reduced. However, the electrolyte in the energy storage battery is consumed along with the use, so under a proper condition, the battery needs to be subjected to liquid supplementing operation, the cycle life of the battery is prolonged, and the electrical property of the battery is fully exerted.

Therefore, it is necessary to design an end cap assembly and a battery, which can implement secondary fluid infusion of the battery, so as to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings of the prior art, the present invention provides an end cap assembly and battery. This end cover subassembly and battery through the seal assembly that slides the setting on the notes liquid hole at the end cover at the elastic component support, realizes annotating the free switching of liquid hole deblocking and sealed to the apron structure of battery can't support the technical problem of the secondary fluid infusion of battery among the solution prior art.

To achieve the above and other related objects, the present invention provides an end cap assembly, comprising: end cap, seal assembly and elastic component.

The end cover is provided with a liquid injection hole for injecting electrolyte; the sealing assembly is arranged on the liquid injection hole and seals the liquid injection hole from one side of the end cover close to the battery core; the elastic piece is connected with the sealing assembly, and when the elastic piece receives an acting force from one side far away from the battery cell to one side close to the battery cell, the sealing assembly is driven to open the liquid injection hole.

In some examples of the present invention, the seal assembly includes a support portion and a seal portion; the supporting part is connected with the sealing part, and the sealing part seals one side of the liquid injection hole, which is close to the battery core, from one side of the end cover, which is close to the battery core; one end of the elastic piece abuts against one side, far away from the battery core, of the end cover, and the other side of the elastic piece abuts against the supporting part.

In some examples of the present invention, the sealing assembly further includes a support column, the support column runs through the liquid injection hole, one end of the support column is connected to the support portion, and the other end of the support column is connected to the sealing portion.

In some examples of the present invention, the support column has a gap with the inner wall of the liquid injection hole.

In some examples of the present invention, the elastic member is a spring, and the spring is fitted to an outer side of the supporting pillar.

In some examples of the present invention, the end cap assembly further comprises a seal disposed between the seal portion and the end cap.

In some examples of the present invention, the sealing assembly further includes a protective cover, the protective cover being detachably mounted to the injection hole and being away from one side of the battery cell.

The utility model discloses in some examples, the end cover subassembly is in keeping away from of notes liquid hole the position department of electricity core is equipped with annotates the liquid cell body, it sets up to annotate the liquid hole annotate the bottom of liquid cell body, visor demountable installation be in annotate on the liquid cell body.

In some examples of the present invention, the protective cover is screwed to the liquid injection groove body.

The utility model also provides a battery, energy storage battery includes battery housing, energy storage electricity core and electrolyte, be provided with in the battery housing energy storage electricity core and electrolyte, battery housing's top sets up above-mentioned arbitrary example the end cover subassembly.

The utility model provides an end cover subassembly and battery uses the elastic component to support the seal assembly that slides the setting on the notes liquid hole of end cover, makes seal assembly when receiving the oppression annotate the liquid hole to the inboard drive sealing of battery through the elastic deformation characteristic of elastic component to drive and maintain the sealing and restore to the throne the shutoff and annotate the liquid hole when seal assembly does not receive the oppression, with realize annotating liquid hole deblocking and sealed free switching on battery case. This liquid structure is annotated to battery, simple structure is clear, and convenient operation is swift, can utilize the elasticity characteristic that resets of elastic component, guarantees on the battery case that annotates liquid hole deblocking and the free switching of encapsulated situation under the prerequisite that need not to dismantle spare part to the realization is to the liquid supplementation many times of battery, guarantees the cyclicity ability of the inside electric core of battery, thereby improves the life of battery. Therefore, the utility model discloses thereby effectively overcome some practical problems among the prior art and had very high use value and use meaning.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded view of a battery electrolyte injection structure on a battery cover plate in accordance with some embodiments of the present invention;

fig. 2 is a cross-sectional view of a battery electrolyte injection structure in a top portion of a battery housing according to some embodiments of the present invention;

fig. 3 is a top view of a battery cover according to some embodiments of the present invention;

fig. 4 isbase:Sub>A cross-sectional view ofbase:Sub>A battery cover plate in the directionbase:Sub>A-base:Sub>A of fig. 3 according to some embodiments of the present invention;

fig. 5 is a three-dimensional view of a protective cover of a battery electrolyte injection structure in accordance with certain embodiments of the present invention;

fig. 6 is a schematic structural view of the sealing assembly in the battery inner side portion in the battery electrolyte injection structure according to some embodiments of the present invention.

Description of the element reference numerals

100. An end cap; 110. a positive electrode; 120. a negative electrode; 200. a battery electrolyte injection structure; 210. a liquid injection hole; 220. a seal assembly; 221 a sealing part; 2211. a seal member; 222. a support portion; 223. a support pillar; 230. an elastic member; 240. a liquid injection groove body; 241. a first thread; 250. a protective cover; 251. polygonal bolt heads; 252. a second thread.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the present invention is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.

It should be understood that the terms "upper", "lower", "left", "right", "middle" and "one" used herein are for clarity of description, and are not intended to limit the scope of the invention, but rather the scope of the invention.

Referring to fig. 1 to 6, the present invention provides an end cap assembly and a battery. This end cover subassembly and battery through the seal assembly that slides the setting on the notes liquid hole at the end cover at the elastic component support, realizes annotating the free switching of liquid hole deblocking and sealed to the apron structure of battery can't support the technical problem of the secondary fluid infusion of battery among the solution prior art.

Referring to fig. 1 and 2, the present invention provides an end cap assembly, which includes an end cap 100 and a battery liquid injection structure 200, wherein the end cap 100 is detachably mounted on a top case of a battery case, and a battery core and an electrolyte are mounted in the battery case. The end cover 100 is used for sealing a battery shell of a battery, the end cover 100 is provided with a positive electrode 110, a negative electrode 120 and a battery liquid injection structure 200, the positive electrode 110 and the negative electrode 120 on the end cover 100 are in contact with electrolyte in the battery shell to realize charge exchange, and the end cover 100 supports the outside to perform liquid supplement on the electrolyte in the battery for multiple times through the battery liquid injection structure 200, so that the cycle performance of a battery core in the battery is maintained, and the service life of the battery is prolonged. The battery electrolyte injection structure 200 includes an electrolyte injection hole 210, a sealing member 220 and an elastic member 230.

Referring to fig. 1 and 2, the electrolyte injection hole 210 is formed in the end cap 100 at the top of the battery case for injecting electrolyte into the battery. The electrolyte injection hole 210 penetrates through the casing of the end cap 100 and is respectively communicated with the inner cavity of the battery casing and the outer part of the battery casing, so that a user can conveniently replenish electrolyte into the battery through the electrolyte injection hole 210.

Referring to fig. 1 and 2, the sealing assembly 220 is disposed on the end cap 100, the sealing assembly 220 is slidably inserted into the electrolyte injection hole 210, a liquid injection gap is formed between the sealing assembly 220 and the electrolyte injection hole 210, and the liquid injection gap between the sealing assembly 220 and the electrolyte injection hole 210 can provide a passage for external electrolyte to enter the battery. A portion of the sealing member 220 is located on the side of the end cap 100 facing into the battery, another portion of the sealing member 220 is located on the side of the end cap 100 facing out of the battery, and the sealing member 220 seals the electrolyte injection hole 210 from the side of the end cap 100 adjacent to the battery cell by using the portion located in the battery.

Referring to fig. 1 and 2, the elastic member 230 is disposed between the end cap 100 and the sealing member 220, the elastic member 230 is connected to the sealing member 220 at the top of the liquid filling hole 210 of the end cap 100, and the elastic member 230 elastically acts on the sealing member 220 at the side of the liquid filling hole 210 of the end cap 100 facing the outside of the battery, so as to drive the sealing member 220 to slide in the liquid filling hole 210 in a resettable manner, thereby achieving the free switching between unsealing and sealing of the liquid filling hole 210 by the sealing member 220 under the operation of an external force. Specifically, when the part of the sealing assembly 220 on the outer side of the end cap 100 is not pressed by an external force, the elastic member 230 can support the sealing assembly 220 on the outer side of the end cap 100, so as to drive the part of the sealing assembly 220 on the inner side of the battery to be butted and blocked on the electrolyte injection hole 210 on the side of the end cap 100 close to the battery core; when the sealing assembly 220 is pressed by an acting force from a side far away from the battery core to a side close to the battery core on the outer side of the battery, the sealing assembly 220 and the elastic member 230 are forced to slide together towards the inner side of the battery, so as to drive the sealing assembly 220 to be separated from the liquid injection hole 210 on the side, close to the battery core, of the end cover 100, and thus the liquid injection hole 210 is unsealed, so that liquid can be conveniently supplied to the interior of the battery from the outside; after the sealing assembly 220 is pressed by external force, the elastic member 230 in the compressed state drives the sealing assembly 220 to reset and move towards the outer side of the end cover 100 through the elastic deformation characteristic of the elastic member, so that the part of the sealing assembly 220 on the inner side of the battery is driven to reset and block the electrolyte injection hole 210.

Referring to fig. 2 to 4, the sealing assembly 220 includes a sealing portion 221 and a supporting portion 222, and the supporting portion 222 is connected to the sealing portion 221. Wherein, the sealing part 221 is located on the side of the sealing assembly 220 facing into the battery, and the sealing part 221 of the sealing assembly 220 seals the side of the electrolyte injection hole 210 close to the battery cell from the side of the end cover close to the battery cell, specifically, on the inner side of the battery case, the sealing part 221 on the sealing assembly 220 can abut against the electrolyte injection hole 210 on the inner side of the end cover 100 to seal the side of the electrolyte injection hole 210 close to the battery cell; the support portion 222 is located on one side of the sealing assembly 220 facing the outside of the battery, the elastic member 230 acts on the support portion 222 of the sealing assembly 220 outside the end cap 100, specifically, one end of the elastic member 230 abuts against the end cap 100 at the periphery of the liquid injection hole 210, the other end of the elastic member 230 abuts against the support portion 222 of the sealing assembly 220, the elastic member 230 drives the sealing assembly 220 to perform a resetting movement by acting on the support portion 222 through its own elastic deformation, so that the sealing portion 221 of the sealing assembly 220 is driven to reset and abut against the liquid injection hole 210 when the support portion 222 is not pressed by an external force, thereby blocking the liquid injection hole 210.

Referring to fig. 1 and 2, in some embodiments of the present invention, the sealing assembly 220 further includes a supporting column 223, the sealing assembly 220 is mounted on the liquid injection hole 210 through the supporting column 223, the shape of the supporting column 223 of the sealing assembly 220 matches with the shape of the liquid injection hole 210, and a liquid injection gap is left between the supporting column 223 and the liquid injection hole 210.

Referring to fig. 2 and 4, in the present embodiment, the supporting portion 222 of the sealing assembly 220 is disposed on one end of the supporting column 223 facing the outside of the battery, and the sealing portion 221 of the sealing assembly 220 is disposed on one end of the supporting column 223 facing the inside of the battery. The supporting portion 222 is detachably mounted on the end of the supporting column 223, a spacer is fixedly disposed on the surface of the supporting portion 222 contacting the elastic member 230, and the spacer serves as a buffer member between the supporting portion 222 and the elastic member 230 to reduce the rigid friction between the elastic member 230 and the supporting portion 222, so as to protect the supporting portion 222 and the elastic member 230.

In addition, it should be noted that the type of the elastic member 230 is not limited, and the elastic member 230 may be any elastic member capable of elastically deforming, for example, as shown in fig. 1 and fig. 2, in this embodiment, the elastic member 230 is a spring, the spring is sleeved outside the supporting column 223 of the sealing assembly 220, one end of the spring abuts against one side of the end cap 100 away from the battery cell at the periphery of the liquid injection hole 210, and the other end of the spring abuts against the supporting portion 222 of the sealing assembly 220.

Referring to fig. 1, fig. 2 and fig. 6, in some embodiments of the present invention, the end cap assembly further includes a sealing element 2211, the sealing element 2211 is disposed between the sealing portion 221 and the end cap 100, and when the sealing element 221 blocks the electrolyte injection hole by the sealing assembly 220, the sealing element 221 is pressed by the sealing portion 221 to be tightly attached to a side of the electrolyte injection hole 210 close to the battery cell, so as to block the electrolyte injection hole 210. The sealing member 2211 may be fixedly disposed on the sealing assembly 220, for example, the sealing member 2211 is fixedly disposed on a surface of the sealing portion 221 facing the injection hole 210. When the sealing part 221 of the sealing member 220 abuts against and blocks the pour hole 210, the sealing member 2211 on the sealing part 221 abuts against the pour hole 210 to isolate the pour hole 210 from communicating with the inside of the battery case.

The type of the sealing element 2211 is not limited, for example, the sealing element 2211 may be a sealing pad or a sealing ring sleeved on the supporting column 223 of the sealing assembly 220, in this embodiment, the sealing element 2211 is a sealing pad sleeved on the supporting column 223 and fixed on one surface of the sealing part 221 facing the liquid injection hole 210, and the sealing pad has a plurality of concentric annular protrusions on one surface facing the liquid injection hole 210. When the sealing gasket is tightly attached to the liquid injection hole 210 on the inner side of the end cover 100, a plurality of barriers can be formed between the electrolyte in the battery and the liquid injection hole 210 by virtue of a plurality of annular protrusions on the periphery of the liquid injection hole 210, so that the air tightness of the sealing gasket for sealing the liquid injection hole 210 is enhanced.

Referring to fig. 1 to 4, in some embodiments of the present invention, the sealing assembly 220 further includes a protective cover 250, and the protective cover 250 is detachably mounted on a side of the liquid injection hole 210 away from the battery cell.

Referring to fig. 1 to 4, in the present embodiment, the end cap 100 is provided with a liquid injection groove 240 at a position where the liquid injection hole 210 is disposed, an opening of the liquid injection groove 240 on the end cap 100 faces the outside of the battery and is flush with the surface of the top case of the end cap 100, the liquid injection groove 240 extends from the opening to the inside of the battery, so that the bottom of the liquid injection groove 240 is close to the surface of the top case facing the inside of the battery, and the liquid injection hole 210 is disposed at the bottom of the liquid injection groove 240 to communicate the inside and the outside of the end cap 100.

As shown in fig. 2 to 4, in the present embodiment, the sealing assembly 220 of the battery electrolyte filling structure 200 is slidably inserted into the electrolyte filling hole 210 of the top case, part of the sealing assembly 220 is located on the side of the electrolyte filling hole 210 facing into the battery, i.e. the sealing part 221 and part of the supporting columns 223 of the sealing assembly 220 are located on the inner side of the end cap 100, and another part of the sealing assembly 220 is located in the electrolyte filling groove body 240 of the electrolyte filling hole 210 facing to the outer side of the battery, i.e. the supporting part 222 and another part of the supporting columns 223 of the sealing assembly 220 are located in the electrolyte filling groove body 240. The liquid injection groove 240 can provide fixation when the liquid injection device injects liquid into the liquid injection hole 210, and provides a pre-storage space when replenishing liquid for the liquid injection hole 210 through the groove.

As shown in fig. 4, the part of the sealing assembly 220 located outside the end cap 100 is located in the liquid filling groove body 240 to be protected by the liquid filling groove body 240, so as to prevent the sealing assembly 220 from directly protruding and exposing on the end cap 100. In order to further protect the sealing assembly 220 on the end cap 100, the liquid injection groove body 240 is further provided with a protective cover 250. The protective cover 250 is detachably mounted on the liquid injection groove body 240, and when liquid needs to be replenished into the battery through the battery liquid injection structure 200, the protective cover 250 only needs to be detached from the liquid injection groove body 240, and the sealing assembly 220 is pressed to unseal the liquid injection hole 210, so that the liquid can be replenished; after the fluid infusion is completed, the protective cover 250 is mounted on the fluid injection groove body 240 to protect the sealing assembly 220 in the fluid injection groove body 240. Moreover, after the protection cover 250 is installed in the injection slot body 240, a gap is left between the top cover body of the protection cover 250 and the sealing assembly 220 in the injection slot body 240, so as to prevent the protection cover 250 from pressing the sealing assembly 220 to drive the sealing portion 221 of the sealing assembly 220 to be out of position after being installed, and further prevent the sealing assembly 220 from completely blocking the injection hole 210.

As shown in fig. 4 and 5, in this embodiment, the protective cover 250 is detachably mounted on the liquid injection groove body 240 by a threaded connection. The inner wall of the liquid injection groove body 240 is provided with first threads 241, the side wall of the protective cover 250 is matched with the liquid injection groove body 240 in shape, the side wall of the protective cover 250 is provided with second threads 252 matched with the first threads 241, and the protective cover 250 can be detachably mounted on the liquid injection groove body 240 through the threaded connection relationship between the second threads 252 of the side wall and the first threads 241 on the inner wall of the liquid injection groove body 240. Moreover, the top of the protection cover 250 is provided with a polygonal bolt head 251, and a user can rotate the polygonal bolt head 251 to drive the protection cover 250 to rotate on the liquid injection groove body 240, so that the protection cover 250 can be installed and detached on the liquid injection groove body 240 in a threaded manner.

Referring to fig. 1 to 4, in some embodiments of the present invention, the present invention further provides a battery, which includes a battery housing, an electric core and an electrolyte, wherein the electric core is fixedly disposed in an inner cavity of the battery housing and is filled with the electrolyte, and the top housing of the battery housing is provided with the end cap assembly according to any of the embodiments. The end cover assembly seals the battery shell at the top through the end cover 100, and freely switches the plugging and the unsealing of the liquid injection hole 210 on the end cover 100 through the battery liquid injection structure 200, so that the external electrolyte in the battery is supplemented for multiple times through the battery liquid injection structure 200, the cycle performance of a battery core in the battery is maintained, and the service life of the battery is prolonged.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. An end cap assembly, comprising:

the end cover is provided with a liquid injection hole for injecting electrolyte;

the sealing assembly is arranged in the liquid injection hole and seals the liquid injection hole from one side of the end cover close to the battery core;

the elastic piece is connected with the sealing assembly, and when the elastic piece receives acting force from one side far away from the battery cell to one side close to the battery cell, the elastic piece drives the sealing assembly to open the liquid injection hole.

2. The end cap assembly of claim 1, wherein the seal assembly includes a support portion and a seal portion;

the supporting part is connected with the sealing part, and the sealing part seals one side of the liquid injection hole, which is close to the battery core, from one side of the end cover, which is close to the battery core;

one end of the elastic piece abuts against one side, far away from the battery core, of the end cover, and the other side of the elastic piece abuts against the supporting part.

3. The end cap assembly of claim 2, further comprising a support post extending through the injection hole, one end of the support post being connected to the support portion and the other end of the support post being connected to the sealing portion.

4. The end cap assembly of claim 3, wherein the support posts are spaced from the inner wall of the pour hole.

5. The end cap assembly of claim 3, wherein the resilient member is a spring that is sleeved outside the support post.

6. The end cap assembly of claim 2, further comprising a seal disposed between the seal portion and the end cap.

7. The end cap assembly of any one of claims 1 to 6, wherein the sealing assembly further comprises a protective cover, and the protective cover is detachably mounted on a side of the liquid injection hole away from the battery cell.

8. The end cover assembly of claim 7, wherein the end cover assembly is provided with a liquid injection groove body at a position of the liquid injection hole far away from the battery core, the liquid injection hole is arranged at the bottom of the liquid injection groove body, and the protective cover is detachably mounted on the liquid injection groove body.

9. The end cap assembly of claim 8, wherein the protective cap is threadably attached to the fluid injection channel body.

10. A battery, characterized in that the top of the battery is provided with an end cap assembly according to any one of claims 1 to 9.