CN211295236U

CN211295236U - Battery module

Info

Publication number: CN211295236U
Application number: CN202020219552.2U
Authority: CN
Inventors: 陆巍巍; 温业勇; 张伟; 龙腾; 方海辉
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-08-18
Anticipated expiration: 2030-02-27

Abstract

The present disclosure relates to a battery module, which includes a plurality of cell monomers, a cell partition bracket and an exhaust channel assembly; the battery cell monomers are sequentially arranged along the thickness direction to form a battery pack; the battery cell partition plate bracket is positioned between two adjacent battery cell monomers; the exhaust channel assembly comprises an exhaust channel body, an inner sealing piece, an outer sealing piece and an exhaust channel pressure relief opening; the exhaust passage pressure relief port is located on the upper surface of the exhaust passage body, and the inner sealing element and the outer sealing element both protrude out of the lower surface of the exhaust passage body and are connected with the upper surface of the battery pack. The battery module can effectively prevent smoke and gas from leaking in the battery module.

Description

Battery module

Technical Field

The utility model relates to an electric automobile battery field specifically relates to a battery module.

Background

The power battery is used as a green new energy source, can greatly reduce the emission of automobile exhaust, plays an important role in environmental protection, and is more and more concerned by people. Due to the special internal physical structure and components, the lithium battery is easy to cause safety problems in the use process if the lithium battery is not used properly, such as fire, smoke and the like. The smoke or gas has certain toxicity, and seriously endangers the safety of personnel, so the emission of the smoke or gas needs to be strictly controlled. At present, an exhaust channel is designed on a top cover of a battery module, but the problems of smoke and gas leakage caused by poor sealing still exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a battery module, this battery module sets up two-layer protection of inner seal spare and external seal spare to the exhaust passage subassembly, ensures that smog, the gas that the battery module produced can not leak in the battery module, and outside smog, the gas passed through exhaust passage pressure release mouth discharge module, avoid taking place the incident.

In order to achieve the above object, the present disclosure provides a battery module, including a plurality of cell monomers, a cell partition bracket, and an exhaust channel assembly; the battery cell monomers are sequentially arranged along the thickness direction to form a battery pack; the battery cell partition plate bracket is positioned between two adjacent battery cell monomers; the exhaust channel assembly comprises an exhaust channel body, an inner sealing piece, an outer sealing piece and an exhaust channel pressure relief opening; the exhaust passage pressure relief port is located on the upper surface of the exhaust passage body, and the inner sealing element and the outer sealing element both protrude out of the lower surface of the exhaust passage body and are connected with the upper surface of the battery pack.

Optionally, the inner seal comprises a first protrusion and a first gasket connected below the first protrusion; the outer sealing element comprises a second protruding part and a second sealing gasket connected below the second protruding part; the inner seal and the outer seal form a ring shape.

Optionally, the first projection width is greater than the width of the second projection; the first projection height is consistent with the second projection height.

Optionally, the first gasket height is less than the second gasket height.

Optionally, the first sealing gasket and the second sealing gasket are both made of a silicone material.

Optionally, the exhaust passage pressure relief opening is a tubular air hole protruding from the upper surface of the exhaust passage body.

Optionally, the battery module further comprises a module upper cover, the module upper cover is provided with a through hole, and the through hole corresponds to the exhaust channel pressure relief opening.

Optionally, the exhaust channel assembly further includes exhaust channel mounting blocks, and the exhaust channel mounting blocks are arranged on two sides of the exhaust channel body in the stacking direction of the cell monomers and correspond to each of the cell separator supports; and each exhaust channel mounting block is provided with a mounting hole which is connected with the battery core clapboard bracket.

Optionally, each cell unit is provided with two electrodes and an explosion-proof valve, the explosion-proof valve is located between the two electrodes, the exhaust channel assembly is located right above the explosion-proof valve, and the outer sealing piece is located between the two electrodes.

This is disclosed through set up inside and outside twice sealing member on exhaust passage subassembly, ensures that smog, the gas that the battery module produced can not leak in the battery module, and outside smog, gas passed through exhaust passage pressure release mouth discharge module, avoided taking place the incident.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is an exploded view of a battery module structure;

fig. 2 is a schematic diagram of a battery pack and a cell separator bracket according to an embodiment;

FIG. 3 is a schematic view of an embodiment exhaust passage assembly;

FIG. 4 is a schematic cross-sectional view of an embodiment of an exhaust passage assembly.

Description of the reference numerals

1. A battery pack; 11. a battery cell monomer; 111. an explosion-proof valve; 112. an electrode; 2. an exhaust passage assembly; 21. a vent passage relief port; 22. an exhaust passage mounting block; 221. mounting holes; 23. an outer seal; 231. a second projection; 232. a second gasket; 24. an inner seal; 241. a first projecting portion; 242. a first gasket; 25. an exhaust passage body; 3. a module upper cover; 31. a through hole; 4. cell baffle support.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, the use of directional terms such as "upper, lower, left, right" and "above" generally refer to orientations and positional relationships illustrated in the drawings, for convenience in describing the present invention and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. "first, second" are generally referred to for descriptive purposes and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 to 3, the present disclosure provides a battery module, which includes a plurality of battery cells 11, a battery partition plate bracket 4, and an exhaust channel assembly 2; the battery cell monomers 11 are sequentially arranged along the thickness direction to form a battery pack 1; the battery cell partition plate bracket 4 is positioned between two adjacent battery cell single bodies 11; the exhaust passage component 2 comprises an exhaust passage body 25, an inner sealing piece 24, an outer sealing piece 23 and an exhaust passage pressure relief opening 21; exhaust passage relief port 21 is located on the upper surface of exhaust passage body 25, and inner seal 24 and outer seal 23 both protrude from the lower surface of exhaust passage body 25 and are connected to the upper surface of battery pack 1.

The inner seal 24 includes a first protrusion 241 and a first packing 242 connected below the first protrusion 241; the outer seal 23 includes a second protrusion 231 and a second packing 232 connected below the second protrusion 231; the inner seal 24 forms an annular ring with the outer seal 23. As shown in fig. 4, the inner seal member 24 and the outer seal member 23 are rectangular protrusions, and the outer seal member 23 is located at the edge of the exhaust passage body 25. The inner seal 24 forms a concave closed area which is a gas and smoke exhaust passage.

Further, the width of the first protrusion 241 is greater than the width of the second protrusion 231; the first protrusion 241 has a height identical to that of the second protrusion 231. The main sealing effect of the exhaust channel assembly 2 is that the inner sealing element 24 and the outer sealing element 23 are auxiliary sealing, so that the width of the corresponding first protruding part 241 is larger than that of the second protruding part 231, and the sealing effect is better.

Further, the height of the first sealing gasket 242 is smaller than that of the second sealing gasket 232, under the same pressure, the compression amount of the first sealing gasket 242 is smaller than that of the second sealing gasket 232, the sealing effect of the outer sealing element 23 is larger than that of the inner sealing element 24, and the sealing performance is enhanced layer by layer.

The first sealing pad 242 and the second sealing pad 232 are both made of silicone material, and in this embodiment, HT800 material is used. Structural adhesives are applied to the connection surfaces of the first gasket 242 and the second gasket 232 with the battery pack 1 to fix the exhaust passage assembly 2.

The exhaust passage relief opening 21 is a tubular air hole protruding from the upper surface of the exhaust passage body 25.

Further, the battery module further comprises a module upper cover 3, the module upper cover 3 is provided with a through hole 31, and the through hole 31 corresponds to the exhaust channel pressure relief opening 21. The exhaust passage relief port 21 is inserted into the through hole 31, so that the smoke and gas are exhausted out of the module through the exhaust passage relief port 21.

The exhaust channel assembly 2 further comprises exhaust channel mounting blocks 22, and the exhaust channel mounting blocks 22 are arranged on two sides of the exhaust channel body 25 in the stacking direction of the cell monomers 11 and correspond to each cell separator bracket 4; each exhaust channel mounting block 22 is provided with a mounting hole 221, and is connected with the cell partition plate support 4. After the inner sealing pad 24 and the outer sealing pad 23 are spliced with the battery pack 1, the screw penetrates through the mounting hole 221 to be connected with the battery cell partition plate support 4, and along with the increase of the torsion, the volumes of the inner sealing pad 24 and the outer sealing pad 23 are continuously compressed and reduced by 20-50%.

Two electrodes 112 and an explosion-proof valve 111 are arranged on each cell unit 11, the explosion-proof valve 111 is located between the two electrodes 112, the exhaust channel assembly 2 is located right above the explosion-proof valve 111, and the outer sealing member 23 is located between the two electrodes 112. The smoke and gas are exhausted from the explosion-proof valve 111 and exhausted out of the module through the exhaust passage component 2.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure. For example, the exhaust passage mounting block may be replaced with a mounting clip.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A battery module is characterized by comprising a plurality of battery cell monomers, a battery cell partition plate bracket and an exhaust channel assembly; the battery cell monomers are sequentially arranged along the thickness direction to form a battery pack; the battery cell partition plate bracket is positioned between two adjacent battery cell monomers; the exhaust channel assembly comprises an exhaust channel body, an inner sealing piece, an outer sealing piece and an exhaust channel pressure relief opening; the exhaust passage pressure relief port is located on the upper surface of the exhaust passage body, and the inner sealing element and the outer sealing element both protrude out of the lower surface of the exhaust passage body and are connected with the upper surface of the battery pack.

2. The battery module according to claim 1, wherein the inner sealing member comprises a first protrusion and a first gasket coupled under the first protrusion; the outer sealing element comprises a second protruding part and a second sealing gasket connected below the second protruding part; the inner seal and the outer seal form a ring shape.

3. The battery module according to claim 2, wherein the first protrusion width is greater than the second protrusion width; the first projection height is consistent with the second projection height.

4. The battery module according to claim 3, wherein the first gasket height is less than the second gasket height.

5. The battery module according to claim 2, wherein the first and second gaskets are both a silicone material.

6. The battery module according to claim 1, wherein the vent hole is a tubular air hole protruding from the upper surface of the vent body.

7. The battery module according to claim 6, further comprising a module upper cover provided with a through hole corresponding to the exhaust channel pressure relief opening.

8. The battery module of claim 1, wherein the exhaust channel assembly further comprises exhaust channel mounting blocks, the exhaust channel mounting blocks being arranged on both sides of the exhaust channel body in the cell monomer stacking direction and corresponding to each of the cell separator holders; and each exhaust channel mounting block is provided with a mounting hole which is connected with the battery core clapboard bracket.

9. The battery module according to claim 1, wherein each of the cell units has two electrodes and an explosion-proof valve, the explosion-proof valve is located between the two electrodes, the exhaust channel assembly is located directly above the explosion-proof valve, and the outer seal member is located between the two electrodes.