CN218525697U

CN218525697U - Battery pressure relief mechanism and battery shell and battery with same

Info

Publication number: CN218525697U
Application number: CN202220740506.6U
Authority: CN
Inventors: 韩晓宇; 雷政军; 张三学
Original assignee: Shaanxi Olympus Power Energy Co Ltd
Current assignee: Shaanxi Olympus Power Energy Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2023-02-24
Anticipated expiration: 2032-03-31

Abstract

The utility model relates to a battery pressure release mechanism and have battery case and battery of this pressure release mechanism, the novel nipple rectifier comprises a cylindrical shel, the barrel is provided with the pressure release subassembly, the pressure release subassembly includes at least one pressure release membrane and fixes the fixed part of pressure release membrane. The utility model discloses a set up fixed part and pressure release membrane on pressure release mechanism barrel to the simple mode of economy, it is complicated to have solved pressure release mechanism structure, and the difficult and with high costs problem of technology.

Description

Battery pressure relief mechanism and battery shell and battery with same

Technical Field

The utility model relates to an energy storage battery technical field especially relates to a battery pressure release mechanism and have battery housing and battery of this mechanism.

Background

At present, most hard-shell power batteries are provided with a safety explosion venting device, so that the problem that the internal pressure of the battery is released under an extreme condition is solved. The establishment and the implementation of relevant laws and standards of the rupture disk provide a basis for scientifically and reasonably designing, manufacturing and using the rupture disk.

CN215933763U discloses a pressure relief valve, comprising a valve body having a first end and a second end and a through hole extending between and through the first end and the second end; the valve comprises a breathable film connected with the first end of the valve body, and a valve cover with a fluid channel and covering the breathable film, wherein the valve body comprises a flange structure which is positioned between the first end and the second end and extends out in the circumferential direction.

CN213546508U discloses a relief valve and battery package, the relief valve includes: the mounting body can be arranged at the pressure relief opening and is provided with an exhaust channel communicated with the pressure relief opening; the cover plate assembly comprises a cover plate which is arranged on the exhaust channel and is far away from the exhaust port in an openable and closable manner, and the cover plate is in a covering state capable of covering the exhaust port and in an opening state capable of being opened when the pressure in the exhaust port is larger than a preset value; and the exhaust mechanism is arranged in the exhaust channel and can promote the gas in the pressure relief port to be exhausted.

CN213278312U discloses a pressure release valve of battery pack, which comprises: lower casing, upper housing and valve body. The lower case is mounted on the outer case of the battery pack. The upper shell is mounted on the lower shell, and the upper shell and the lower shell form a space in the valve. The valve body is arranged on the lower shell, the valve body is in sealing contact with the lower shell and divides the space in the valve into an inner space and an outer space, the valve body comprises an installation support, an elastic part and a breathable film, the installation support is connected with the elastic part into a whole, the installation support is arranged on the lower shell, the elastic part surrounds the breathable film to surround the breathable film in a central region, the elastic part is arranged in a peripheral region, and the elastic part is in sealing contact with the inner side wall of the lower shell in an interference fit mode. The inner side space is communicated with the inside of the battery pack, the outer side space is communicated with the outside, the pressure inside the battery pack and the external pressure are subjected to pressure balance through the breathable film, or the elastic part deforms and is separated from the inner side wall of the lower shell to form the pressure relief channel to quickly balance the pressure.

However, the explosion venting valve disclosed in the above patent has a complex structure, is inconvenient to operate and has poor practical effect.

Disclosure of Invention

In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a battery pressure relief mechanism, includes the barrel, the barrel is provided with pressure relief component, pressure relief component includes at least one pressure relief membrane and fixes the fixed part of pressure relief membrane.

Preferably, the fixing part further includes a fixing ring and a pressure relief film supporting part to support the pressure relief film.

Preferably, the support part is fixedly provided with 2-12 pressure relief membranes.

Preferably, the 2-12 pressure relief membranes are all round or oval and are uniformly arranged on the supporting part; and the pressure relief film is also covered with a pressure relief film protective layer.

In order to solve the above technical problem, the utility model discloses a another technical scheme is: a battery case is provided, which comprises a case body and the battery pressure relief mechanism.

Preferably, one end of the cylinder body comprises a first mounting part for mounting the pressure relief mechanism on the cylinder body.

Preferably, the other end of the cylinder body is provided with a second installation part for being externally connected with a gas collection device.

Preferably, the first mounting portion includes an internal thread or an external thread for fixing the pressure relief mechanism to the battery case.

Preferably, the second mounting portion includes an internal thread.

Preferably, the mounting structure further comprises a pressure relief pipe, and the second mounting portion is fixedly mounted to the pressure relief pipe.

In order to solve the above technical problem, the utility model discloses a further technical scheme be: there is provided a battery comprising a battery case as described in any one of the above.

Above-mentioned battery pressure release mechanism and have battery casing and battery of this mechanism through set up fixed part and pressure release membrane on the pressure release mechanism barrel to economic simple mode has solved pressure release mechanism structure complicacy, the difficult and with high costs problem of technology.

Drawings

FIG. 1 is a schematic view of a pressure relief mechanism in one embodiment;

FIG. 2 is a schematic view of a pressure relief mechanism in one embodiment;

FIG. 3 is a schematic view of a pressure relief mechanism in one embodiment;

FIG. 4 is a schematic view of a battery case according to another embodiment;

fig. 5 is a schematic structural view of a large-capacity battery pack in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Hereinafter, embodiments of a battery pressure release structure, a battery case having the same, and a battery according to the present invention will be specifically disclosed with reference to the drawings as appropriate. But a detailed description thereof will be omitted. For example, detailed descriptions of already known matters and repetitive descriptions of actually the same configurations may be omitted. This is to avoid unnecessarily obscuring the following description, and to facilitate understanding by those skilled in the art. The drawings and the following description are provided for those skilled in the art to fully understand the present invention, and are not intended to limit the subject matter described in the claims.

All embodiments and alternative embodiments of the invention may be combined with each other to form new solutions, if not specifically stated. All the technical features and optional technical features of the invention can be combined with each other to form a new technical solution, if not specifically stated.

The terms "comprises" and "comprising" as used herein mean open and closed unless otherwise specified. For example, "comprising" and "comprises" may mean that other components not listed may also be included or included, or that only listed components may be included or included.

It is to be understood that relational terms such as "first," "second," and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above summary of the present invention is not intended to describe each disclosed embodiment or every implementation of the present invention. The following description more particularly exemplifies illustrative embodiments. At various points throughout this application, guidance is provided through a list of embodiments that can be used in various combinations. In each instance, the list is provided only as a representative group and should not be construed as exhaustive.

Example 1

As shown in fig. 1, a battery pressure relief mechanism includes a barrel 1, the barrel 1 is provided with a pressure relief assembly, and a preferred embodiment is to provide the pressure relief assembly in the middle section of the barrel 1, but it may also be provided in the upper or lower section of the barrel 1 according to actual requirements. The pressure relief assembly comprises at least one pressure relief film 2 and a fixing part 3 for fixing the pressure relief film 2, and the fixing part 3 is a middle section part of the pressure relief assembly cylinder 1. The pressure release film 2 is an aluminum sheet, and the pressure release film 2 can be laser-welded to the fixing portion 3. In order to facilitate explosion during pressure relief, a discontinuous or unclosed line is chiseled on an aluminum sheet to form a weak point, when waste gas generated in the battery pack shell needs pressure relief explosion, the gas rushes out, and the weak point is firstly broken to achieve the aim of safe pressure relief and prevent the explosion of the battery pack shell.

Example 2

As shown in fig. 1, a battery pressure relief mechanism includes a barrel 1, the barrel 1 is provided with a pressure relief assembly, and a preferred embodiment is to provide the pressure relief assembly in the middle section of the barrel 1, but it may also be provided in the upper or lower section of the barrel 1 according to actual requirements. The pressure relief assembly comprises at least one pressure relief film 2 and a fixing part 3 for fixing the pressure relief film 2, and the fixing part 3 is a middle section part of the pressure relief assembly cylinder 1. The pressure release film 2 is an aluminum sheet, and the pressure release film 2 can be laser-welded to the fixing portion 3. In order to facilitate explosion during pressure relief, a discontinuous or unclosed line is chiseled on the aluminum sheet to form a weak point, when waste gas generated in the battery pack shell needs pressure relief explosion, the gas rushes out, the weak point is firstly broken, the purpose of safe pressure relief is achieved, and the explosion of the battery shell is prevented.

In a large-capacity battery, waste gas is generated due to faults, a pressure relief film of a common specification is difficult to bear huge pressure, and cannot play a role of safety pressure relief, therefore, a fixing part 3 is provided with a steel fixing ring 31 which is welded at the middle section part in a cylinder body 1 and can also be arranged at the upper section or the lower section of the cylinder body 1 as required, and no excessive limitation is caused, the fixing ring 31 is laser welded with a pressure relief film supporting part 32, the pressure relief film supporting part 32 is an aluminum sheet, and the pressure relief film 2 is fixed on the aluminum sheet to support the pressure relief film 2. 2-12 pressure release films 2 are fixedly mounted on the pressure release film support 32. As shown in fig. 2, 4 elliptical ring pressure relief membranes 2 or 6 elliptical ring pressure relief membranes 2 can be installed, and specifically, the size of each pressure relief membrane 2 can be adjusted, the larger the battery pack size is, the more the number of pressure relief membranes 2 can be set, and the maximum number can be set to 12, and when the number of pressure relief membranes exceeds 12, the sealing stability of the pressure relief assembly gradually deteriorates. The pressure release films 2 are circular or elliptical and are uniformly distributed on the pressure release film supporting parts 32. The pressure release film 2 is also covered with a pressure release film protective layer for protecting the pressure release film from being corroded and failed by acid and alkali.

Example 3

As shown in fig. 1, a battery pressure relief mechanism includes a barrel 1, the barrel 1 is provided with a pressure relief assembly, and a preferred embodiment is to provide the pressure relief assembly in the middle section of the barrel 1, but it may also be provided in the upper or lower section of the barrel 1 according to actual requirements. The pressure relief assembly comprises at least one pressure relief film 2 and a fixing part 3 for fixing the pressure relief film 2, and the fixing part 3 is a middle section part of the pressure relief assembly barrel 1. The pressure release film 2 is an aluminum sheet, and the pressure release film 2 can be laser-welded to the fixing portion 3. In order to facilitate explosion during pressure relief, a discontinuous or unclosed line is chiseled on the aluminum sheet to form a weak point, when waste gas generated in the battery pack shell needs pressure relief explosion, the gas rushes out, the weak point is firstly broken, the purpose of safe pressure relief is achieved, and the explosion of the battery shell is prevented.

As shown in fig. 4, the cartridge 1 further includes a first mounting portion 11 and a second mounting portion 12. The first mounting part 11 is used for mounting the pressure relief mechanism on the cylinder body 1; the second mounting part 12 is used for connecting a gas collecting pipeline and collecting gas generated after blasting to the waste gas bin. In one embodiment, the first mounting portion 11 is an internal thread which is engaged with an external thread of the battery case to fixedly mount the pressure relief mechanism on the battery case, and in another embodiment, the first mounting portion 11 is an external thread which is engaged with an internal thread of the battery case to fixedly mount the pressure relief mechanism on the battery case.

In one embodiment, the second mounting portion is provided with 12 external threads which are matched with internal threads of a matched pressure relief pipe to fix the pressure relief pipe, and the second mounting portion 12 is provided with the external threads to help to tighten an outlet so as to ensure uniform and stable output of the waste gas. In another embodiment, the second mounting part is 12 internal threads, and is matched and fixed with external threads of a matched pressure relief pipe to play a role in fixing the pressure relief membrane supporting part.

Example 4

This embodiment is a large capacity battery pack comprising the battery pressure relief assembly 5 shown in

embodiments

1, 2, and 3.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a battery pressure relief mechanism, its characterized in that, includes the barrel, the barrel is provided with pressure relief component, pressure relief component includes at least one pressure relief membrane and fixes the fixed part of pressure relief membrane, pressure relief membrane is aluminium system thin slice.

2. The battery pressure relief mechanism of claim 1, wherein said retainer further comprises a retainer ring and a pressure relief membrane support to support said pressure relief membrane.

3. The battery pressure relief mechanism of claim 2, wherein said support portion fixedly mounts 2-12 pressure relief membranes.

4. The battery pressure relief mechanism of claim 3, wherein said pressure relief membrane is circular or oval and is uniformly disposed on said support portion; the pressure release film is also covered with a pressure release film protective layer.

5. A battery casing comprising a casing body, characterised by comprising a battery pressure relief mechanism as claimed in claim 1 or 2.

6. The battery case of claim 5, wherein the can includes a first mounting feature at one end for mounting the pressure relief mechanism to the can.

7. The battery case of claim 5, wherein the other end of the can is provided with a second mounting portion for externally connecting a gas collecting device.

8. The battery case of claim 6, wherein the first mounting portion comprises an internal or external thread for securing the pressure relief mechanism to the battery case.

9. The battery housing of claim 7, wherein the second mounting portion includes internal threads.

10. The battery housing of claim 7, further comprising a pressure relief tube, the second mounting portion being fixedly mounted to the pressure relief tube.

11. A battery comprising a battery housing according to any one of claims 5 to 10.