CN215527817U

CN215527817U - Fixing device of battery explosion-proof cover

Info

Publication number: CN215527817U
Application number: CN202121358681.0U
Authority: CN
Inventors: 励建炬; 胡翔; 肖达安
Original assignee: Huizhou Kdl Precision Industry Co ltd
Current assignee: Huizhou Kdl Precision Industry Co ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-01-14
Anticipated expiration: 2031-06-18

Abstract

The utility model relates to a fixing device of an explosion-proof cover of a battery, which comprises an annular mounting block and the explosion-proof cover, wherein the edge of the explosion-proof cover is fixed on the annular mounting block through a limiting assembly; the limiting assembly comprises an adjusting rod, a limiting block and an elastic piece, one end of the adjusting rod penetrates through the anti-explosion cover and then is in threaded connection with the annular mounting block, the limiting block is fixedly connected with the other end of the adjusting rod, and the elastic piece is sleeved on the adjusting rod and located between the limiting block and the anti-explosion cover. According to the utility model, a gap is generated between the explosion-proof cover and the annular mounting block under strong pressure, so that a part of gas can be emitted from the gap, and the other part of gas can be emitted from the explosion-proof valve on the explosion-proof cover, thus the pressure relief pressure of the explosion-proof valve is effectively reduced, a large amount of gas can be discharged in time, and the internal structure of the lithium battery and the integrity of the explosion-proof cover are better protected.

Description

Fixing device of battery explosion-proof cover

Technical Field

The utility model relates to the field of battery cover bodies, in particular to a fixing device of a battery explosion-proof cover.

Background

Lithium ion power batteries are widely used due to their high energy density, low self-discharge, long service life, and other characteristics. However, the lithium ion battery has poor overcharge and overdischarge resistance, and under abuse conditions or other abnormal use conditions, a large amount of heat is easily generated inside the battery, so that the electrolyte is instantly decomposed to generate a large amount of gas, and the battery is greatly likely to explode when the internal pressure of the gas exceeds the pressure borne by the shell. Therefore, in order to avoid the occurrence of explosion, the battery cover body is generally required to be additionally provided with an explosion-proof cover. The existing explosion-proof cover device usually utilizes an explosion-proof valve to perform pressure relief, the volume of the explosion-proof valve is small, and when the air pressure inside the lithium ion battery is increased instantly, the explosion-proof device may not finish the pressure relief in time, which may cause damage to the internal structure of the lithium ion battery and the explosion-proof cover, thereby causing greater economic loss.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a fixing device for an explosion-proof cover of a battery.

The purpose of the utility model is realized by the following technical scheme:

a fixing device for an explosion-proof cover of a battery comprises an annular mounting block and the explosion-proof cover, wherein the edge of the explosion-proof cover is fixed on the annular mounting block through a limiting assembly; the limiting assembly comprises an adjusting rod, a limiting block and an elastic piece, one end of the adjusting rod penetrates through the anti-explosion cover and then is in threaded connection with the annular mounting block, the limiting block is fixedly connected with the other end of the adjusting rod, and the elastic piece is sleeved on the adjusting rod and located between the limiting block and the anti-explosion cover.

Furthermore, the cross section of the annular mounting block is L-shaped, and the edge of the explosion-proof cover is fixed on the horizontal edge of the annular mounting block.

Further, an arc-shaped air guide groove is formed in the inner side of the vertical edge of the annular mounting block.

Furthermore, an annular stop block is fixedly arranged at the top end of the annular mounting block, a vent is arranged on the annular stop block, and a dust screen is arranged at the vent.

Furthermore, the inner side surface of the ventilation opening is provided with a flange, and the dust screen is installed on the flange.

Furthermore, the explosion-proof cover comprises a cover main body and a horizontal connecting part, wherein the horizontal connecting part is positioned at the edge of the cover main body, and the cover main body is of an inwards-concave arc-shaped structure.

Furthermore, an explosion-proof valve is arranged in the middle of the cover main body.

Furthermore, spacing subassembly is a plurality of, and is a plurality of spacing subassembly is the even interval of annular set up in explosion-proof cover's edge.

Compared with the prior art, the utility model has the beneficial effects that:

according to the fixing device of the battery explosion-proof cover, the explosion-proof cover is fixed on the annular mounting block through the limiting assembly, the explosion-proof cover is tightly attached to the annular mounting block under the action of the elastic piece, when the internal pressure of the lithium battery is overlarge, the explosion-proof cover is impacted to push the explosion-proof cover to move upwards, so that a gap is formed between the explosion-proof cover and the annular mounting block, a part of gas can be diffused from the gap, the other part of gas can be diffused from the explosion-proof valve on the explosion-proof cover, the pressure relief pressure of the explosion-proof valve is effectively relieved, a large amount of gas can be timely exhausted, and the internal structure of the lithium battery and the integrity of the explosion-proof cover are better protected.

In addition, due to the fact that the adjusting rod is in threaded connection with the annular mounting block, the exposed length of the adjusting rod can be adjusted, and the expansion degree of the elastic piece is changed along with the exposed length of the adjusting rod, the pressure of the elastic piece can be adjusted according to air pressure generated by different lithium batteries, and therefore the application range of the limiting assembly is widened.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.

Reference numerals: 1-an annular mounting block; 11-an arc-shaped air guide groove; 2-an explosion-proof cover; 21-a cap body; 22-a horizontal connection; 3-a limiting component; 31-adjusting rod; 32-a limiting block; 33-an elastic member; 4-an annular stop block; 41-a flange; 5-dust screen; 6-explosion-proof valve.

Detailed Description

To facilitate understanding of those skilled in the art, the present invention will be described in further detail below with reference to specific embodiments and the accompanying drawings.

Referring to fig. 1, a preferred embodiment of the present invention is as follows.

A fixing device for an explosion-proof cover of a battery comprises an annular mounting block 1 and an explosion-proof cover 2, wherein the edge of the explosion-proof cover 2 is fixed on the annular mounting block 1 through a limiting assembly 3; the limiting assembly 3 comprises an adjusting rod 31, a limiting block 32 and an elastic piece 33, one end of the adjusting rod 31 penetrates through the explosion-proof cover 2 and then is in threaded connection with the annular mounting block 1, the limiting block 32 is fixedly connected with the other end of the adjusting rod 31, and the elastic piece 33 is sleeved on the adjusting rod 31 and located between the limiting block 32 and the explosion-proof cover 2. The explosion-proof lid 2 of this embodiment is fixed on annular installation piece 1 through spacing subassembly 3, explosion-proof lid 2 pastes tightly on annular installation piece 1 under the effect of elastic component 33, when lithium cell internal pressure was too big, thereby can cause the ascending of the explosion-proof lid 2 of promotion to explosion-proof lid 2, make to produce the clearance between explosion-proof lid 2 and the annular installation piece 1, consequently, some gas can be followed the clearance and dispersed, another part's gas can be followed explosion-proof valve 6 on the explosion-proof lid 2 and dispersed, thereby effectively alleviate the pressure release pressure of explosion-proof valve 6, a large amount of gas of in time discharging, protect the inner structure of lithium cell and the integrality of explosion-proof lid 2 better.

It should be noted that, since the adjustment rod 31 is screwed to the annular mounting block 1, the exposed length of the adjustment rod 31 can be adjusted, and the degree of expansion and contraction of the elastic member 33 is changed along with the exposed length of the adjustment rod 31, the pressure of the elastic member 33 can be adjusted according to the air pressure generated by different lithium batteries, thereby improving the application range of the stopper assembly 3.

The explosion-proof cover 2 comprises a cover main body 21 and a horizontal connecting part 22, wherein the horizontal connecting part 22 is positioned at the edge of the cover main body 21, and the cover main body 21 is of an inwards-concave arc structure; an explosion-proof valve 6 is provided at an intermediate position of the cap main body 21. The provision of the arc-shaped structure can better guide the air flow to the horizontal connecting portion 22, i.e., the edge of the explosion-proof cover 2, so as to better disperse the air flow generated inside the lithium battery. It should be noted that, spacing subassembly 3 is a plurality of, and a plurality of spacing subassemblies 3 are the even interval of annular and set up in the edge of explosion-proof cover 2, and a plurality of spacing subassemblies 3 compress tightly explosion-proof cover 2 jointly to further guarantee explosion-proof cover 2's installation stability and leakproofness.

The cross-section of annular installation piece 1 is the L type, and the edge of explosion-proof cover 2 is fixed on the horizontal edge of annular installation piece 1, is about to place horizontal connecting portion 22 on the horizontal edge of annular installation piece 1 to spacing subassembly 3 compresses tightly and seals. In addition, the arc-shaped air guide groove 11 is formed in the inner side of the vertical edge of the annular mounting block 1, the arc-shaped air guide groove 11 can play a certain role in buffering and guiding the flow direction of air flow, and the air flow is prevented from entering the lithium battery from a gap formed between the explosion-proof cover 2 and the annular mounting block 1 to form turbulent flow.

In this embodiment, the top end of the annular mounting block 1 is fixedly provided with an annular stop block 4, the annular stop block 4 is provided with a vent, and the vent is provided with a dust screen 5. The inner side surface of the ventilation opening is provided with a flange 41, and the dust screen 5 is arranged on the flange 41. The dust screen 5 can effectively prevent external dust from polluting the explosion-proof cover 2 and the lithium battery.

In the description of the present invention, it is to be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate orientations or positional relationships, are used based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and for the simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

While the utility model has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims

1. The fixing device of the battery explosion-proof cover is characterized by comprising an annular mounting block (1) and an explosion-proof cover (2), wherein the edge of the explosion-proof cover (2) is fixed on the annular mounting block (1) through a limiting component (3); spacing subassembly (3) are including adjusting pole (31), stopper (32) and elastic component (33), the one end of adjusting pole (31) is passed behind explosion-proof cover (2) with annular installation piece (1) threaded connection, stopper (32) with the other end fixed connection of adjusting pole (31), elastic component (33) cover is established adjust pole (31) on, and be located between stopper (32) and the explosion-proof cover (2).

2. The fixing device of the explosion-proof cover for the battery as claimed in claim 1, wherein the section of the annular mounting block (1) is L-shaped, and the edge of the explosion-proof cover (2) is fixed on the horizontal edge of the annular mounting block (1).

3. The fixing device for the explosion-proof cover of the battery as claimed in claim 2, wherein the inside of the vertical edge of the annular mounting block (1) is provided with an arc-shaped air guide groove (11).

4. The fixing device for the explosion-proof cover of the battery as claimed in claim 1, wherein the top end of the annular mounting block (1) is fixedly provided with an annular stop block (4), the annular stop block (4) is provided with a vent, and the vent is provided with a dust screen (5).

5. A fixing device of a battery explosion-proof cover according to claim 4, characterized in that the inner side of the ventilation opening is provided with a flange (41), and the dust-proof net (5) is mounted on the flange (41).

6. A fixing device of a battery explosion-proof cover according to claim 1, wherein the explosion-proof cover (2) comprises a cover main body (21) and a horizontal connecting portion (22), the horizontal connecting portion (22) is located at the edge of the cover main body (21), and the cover main body (21) is of an arc structure which is concaved inwards.

7. A fixing device of a battery explosion-proof cover according to claim 6, characterized in that an explosion-proof valve (6) is provided at a middle position of the cover main body (21).

8. The fixing device for the explosion-proof cover of the battery as claimed in claim 1, wherein the number of the limiting assemblies (3) is multiple, and the multiple limiting assemblies (3) are uniformly arranged at the edge of the explosion-proof cover (2) at intervals in a ring shape.