CN215377544U

CN215377544U - Lithium battery shell with integrated heat dissipation function

Info

Publication number: CN215377544U
Application number: CN202120755698.3U
Authority: CN
Inventors: 宋林霏; 朱振东; 冷飞喜
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2021-12-31
Anticipated expiration: 2031-04-13

Abstract

The utility model provides a lithium battery shell with an integrated heat dissipation function, which comprises a shell and a cover plate, wherein the shell is provided with a heat dissipation hole; the casing is seted up and is had the open-ended installation cavity and set up and be equipped with the cavity of phase transition medium around the installation cavity, and the apron cooperation is installed at the casing open end and is sealed installation cavity, sets up on the apron and annotates the liquid hole with the cavity intercommunication. According to the utility model, the cavity is arranged in the shell, the phase change medium is arranged in the cavity, and the phase change medium has the function of absorbing a large amount of heat at the phase change point, so that the heat generated by charging and discharging of the lithium battery is taken away, and the requirement of thermal management of the single lithium battery is met.

Description

Lithium battery shell with integrated heat dissipation function

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a lithium battery shell with an integrated heat dissipation function.

Background

The temperature of the lithium ion battery is kept in the range of 20-30 ℃ optimally, when the temperature of the lithium ion battery exceeds 45 ℃, the cycle life of the lithium ion battery is rapidly reduced, and the thermal safety problem can also occur. Therefore, the service life of the battery can be effectively prolonged and prolonged at the optimal temperature range in the use process of the battery.

The conventional heat dissipation method for the lithium ion battery basically adopts a natural cooling system or a liquid cooling system arranged at the battery pack level, wherein the natural cooling system has poor cooling efficiency, the pipeline design of the liquid cooling system brings extra burden to the battery pack, and meanwhile, the heat transfer path is long, the heat resistance is large, and the cooling effect is general.

SUMMERY OF THE UTILITY MODEL

Based on the technical problems in the background art, the utility model provides a lithium battery shell with an integrated heat dissipation function.

The utility model provides a lithium battery shell with an integrated heat dissipation function, which comprises a shell and a cover plate, wherein the cover plate is arranged on the shell; the casing is seted up and is had the open-ended installation cavity and set up and be equipped with the cavity of phase transition medium around the installation cavity, and the apron cooperation is installed at the casing open end and is sealed installation cavity, sets up on the apron and annotates the liquid hole with the cavity intercommunication.

Preferably, the housing comprises an inner housing and an outer housing; the inner shell is arranged in the outer shell and a gap is reserved between the inner shell and the outer shell to form a cavity.

Preferably, the inner housing is integrally formed with the outer housing.

Preferably, the inner surface of the outer shell is uniformly provided with reinforcing ribs which are longitudinally arranged, and gaps are reserved between the reinforcing ribs and the inner shell.

Preferably, a bolt is further included; the bolt is in threaded connection with the liquid injection hole, and a sealing ring is arranged between the bolt and the cover plate.

Preferably, the housing is a square aluminum housing.

According to the lithium battery shell with the integrated heat dissipation function, the cavity is formed between the inner shell and the outer shell, the phase change medium is injected into the cavity through the liquid injection hole, the phase change medium absorbs a large amount of heat at the phase change temperature point, the shell is made of the square aluminum shell, the heat transfer efficiency is greatly improved, the temperature is in the optimal range in the use process of the battery, and the reinforcing ribs are arranged on the inner wall of the outer shell, so that the rigidity and the strength of the shell are improved, and the service life of the battery is prolonged.

Drawings

Fig. 1 is an exploded view of an integrated heat dissipation function lithium battery case according to the present invention;

fig. 2 is a top cross-sectional view of a lithium battery case with integrated heat dissipation function according to the present invention.

Detailed Description

Referring to fig. 1-2, the utility model provides a lithium battery shell with an integrated heat dissipation function, which comprises a shell 1 and a cover plate 2; casing 1 sets up and has the open-ended installation cavity and set up and be equipped with phase transition medium's cavity 3 around the installation cavity, and 2 cooperations of apron are installed at casing 1 open end and are sealed installation cavity, cavity 3, offer on the apron 2 with the notes liquid hole 4 of cavity 3 intercommunication.

In this embodiment, the housing 1 includes an inner housing 5 and an outer housing 6, the inner housing 5 is disposed in the outer housing 6 and forms a cavity 3 with the outer housing 6, and the inner housing 5 and the outer housing 6 are integrally formed.

In a particular embodiment, further comprising a bolt 8; the bolt 8 is in threaded connection with the liquid injection hole 4, and a sealing ring 9 is arranged between the bolt 8 and the cover plate 2, so that the sealing of the cavity 3 is ensured.

In the specific embodiment, the reinforcing ribs 7 which are longitudinally arranged are uniformly arranged on the inner surface of the outer shell 6, and gaps are reserved between the reinforcing ribs 7 and the inner shell 5, so that the rigidity and the strength of the shell 1 are increased, and the service life of the shell 1 is prolonged.

In the specific embodiment, the shell 1 is a square aluminum shell, and is light and convenient for heat dissipation.

The specific use method of the utility model comprises the following steps: before charging and discharging, the phase-change medium is injected into the cavity 3 through the liquid injection hole 4, then the phase-change medium is in threaded connection with the liquid injection hole 4 through the bolt 8, and a sealing ring 9 is arranged between the bolt 8 and the cover plate 2 to seal the cavity 3; the battery is at the in-process of charge-discharge, and when the temperature of electric core was higher than the phase transition point of medium, the phase transition medium will take place the phase transition, through 1 transmission of casing, absorbs the heat for lithium battery control is in reasonable temperature range, thereby can guarantee the thermal safety nature of battery, and the battery has better cyclicity simultaneously. When the battery is not used, the phase-change material gradually releases heat, becomes an initial state and is restarted in the next charging and discharging process.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The lithium battery shell integrating the heat dissipation function is characterized by comprising a shell (1) and a cover plate (2); casing (1) is seted up and is had open-ended installation cavity and set up and be equipped with cavity (3) of phase transition medium around the installation cavity, and apron (2) cooperation is installed at casing (1) open end and is sealed installation cavity, cavity (3), sets up on apron (2) annotates liquid hole (4) with cavity (3) intercommunication.

2. The lithium battery shell with integrated heat dissipation function as recited in claim 1, wherein the shell (1) comprises an inner shell (5) and an outer shell (6); the inner shell (5) is arranged in the outer shell (6) and a gap is reserved between the inner shell and the outer shell (6) to form a cavity (3).

3. The lithium battery casing with integrated heat dissipation function as recited in claim 2, wherein the inner casing (5) is integrally formed with the outer casing (6).

4. The lithium battery shell with the integrated heat dissipation function as recited in any one of claims 1 to 3, wherein the inner surface of the outer shell (6) is uniformly provided with the reinforcing ribs (7) which are longitudinally arranged, and a gap is reserved between the reinforcing ribs (7) and the inner shell (5).

5. The lithium battery casing with integrated heat dissipation function as recited in any one of claims 1 to 3, further comprising a bolt (8); the bolt (8) is in threaded connection with the liquid injection hole (4), and a sealing ring (9) is arranged between the bolt (8) and the cover plate (2).

6. The lithium battery shell with integrated heat dissipation function as recited in any one of claims 1-3, wherein the shell (1) is a square aluminum shell.