CN222826547U

CN222826547U - Lithium battery

Info

Publication number: CN222826547U
Application number: CN202421397033.XU
Authority: CN
Inventors: 李金林; 汪勇; 郭红祥; 谢燕; 杨允杰; 高培
Original assignee: Huading Guolian Sichuan Battery Material Co ltd
Current assignee: Huading Guolian Sichuan Battery Material Co ltd
Priority date: 2024-06-18
Filing date: 2024-06-18
Publication date: 2025-05-02
Anticipated expiration: 2034-06-18

Abstract

The utility model belongs to the technical field of lithium ion batteries, and discloses a lithium battery, which comprises a battery top cover, a core pack and a shell, wherein a first core pack group and a second core pack group are arranged in the shell, each of the first core pack group and the second core pack group comprises two core packs, the battery top cover is arranged at the upper end of the shell, two ends of the battery top cover are respectively provided with a positive pole post and a negative pole post, the middle part of the battery top cover is provided with a connecting terminal, the positive pole lug of the core pack of the first core pack group is connected with the positive pole post, the negative pole lug of the core pack of the first core pack group is connected with the connecting terminal, the negative pole lug of the core pack of the second core pack group is connected with the negative pole post, and the positive pole lug of the core pack of the second core pack group is connected with the connecting terminal. According to the utility model, a plurality of core bags are connected in series, so that the battery voltage is increased in a multiplied way, a connecting sheet is not required to be designed, and the lugs of the core bags are directly connected with the positive pole post, the negative pole post and the connecting terminal, so that the overcurrent capacity is increased, and the weight is reduced.

Description

Lithium battery

Technical Field

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a lithium battery.

Background

Along with the gradual development of new energy automobiles, the development of batteries is also more rapid, and the batteries gradually develop towards high energy density, high volume utilization rate and high platform voltage. At present, no battery can doubly increase the voltage of a platform.

Disclosure of utility model

The present utility model is directed to a lithium battery for solving the above-mentioned problems of the prior art.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The lithium battery comprises a battery top cover, a core pack and a shell, wherein a first core pack group and a second core pack group which are arranged along the length direction of the shell are arranged in the shell, the first core pack group and the second core pack group respectively comprise two core packs which are arranged along the width direction of the shell, the battery top cover is arranged at the upper end of the shell, the two ends of the battery top cover are respectively provided with an anode pole and a cathode pole, the middle part of the battery top cover is provided with a connecting terminal which is electrically connected with the anode pole and the cathode pole, the anode pole lugs of the two core packs in the first core pack group are connected with the anode pole, the cathode pole lugs of the two core packs in the first core pack group are connected with the connecting terminal, and the anode pole lugs of the two core packs in the second core pack group are connected with the connecting terminal.

As a preferable technical scheme in the utility model, the middle part of the bottom surface of the shell is provided with a mounting hole communicated with the inside of the shell, and an explosion-proof valve is arranged in the mounting hole.

As a preferable technical scheme in the utility model, an explosion-proof valve protection film positioned below the explosion-proof valve is arranged in the mounting hole.

As a preferable technical scheme in the utility model, the inner bottom surface of the shell is provided with a bracket, the first core pack group and the second core pack group are both arranged on the bracket, and the middle part of the bracket is provided with a through hole communicated with the mounting hole.

The utility model has the beneficial effects that the battery top cover is utilized to connect a plurality of core bags in the battery in series, so that the battery voltage is improved by times, and the utility model does not need to design a connecting sheet, and the lugs of the core bags are directly connected with the positive pole post, the negative pole post and the connecting terminal, so that the overcurrent capacity is increased, and the weight is reduced.

Drawings

FIG. 1 is an exploded view of the present utility model;

fig. 2 is a schematic structural view of the present utility model.

In the figure, the battery is 1-a top cover, 101-a positive pole, 102-a negative pole, 103-a connecting terminal, 2-a core package, 3-a shell, 4-an explosion-proof valve, 5-an explosion-proof valve protecting film and 6-a bracket.

Detailed Description

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the present utility model will be briefly described below with reference to the accompanying drawings and the description of the embodiments or the prior art, and it is obvious that the following description of the structure of the drawings is only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art. It should be noted that the description of these examples is for aiding in understanding the present utility model, but is not intended to limit the present utility model.

Examples:

As shown in fig. 1 and 2, this embodiment provides a lithium battery, including a battery top cover 1, a core pack 2 and a casing 3, a first core pack group and a second core pack group which are arranged along the length direction of the casing 3 are arranged in the casing 3, the first core pack group and the second core pack group both include two core packs 2 which are arranged along the width direction of the casing 3, so four core packs 2 can be arranged in total, the battery top cover 1 is installed at the upper end of the casing 3, the two ends of the battery top cover 1 are respectively provided with a positive pole post 101 and a negative pole post 102, the middle part of the battery top cover 1 is provided with a connecting terminal 103 which is electrically connected with the positive pole post 101 and the negative pole post 102, the positive pole lugs of the two core packs 2 in the first core pack group are connected with the positive pole post 101, the negative pole lugs of the two core packs 2 in the first core pack group are connected with the connecting terminal 103, the negative pole lugs of the two core packs 2 in the second core pack group are connected with the negative pole post 102, the two core packs 2 in the second core pack group are connected with the positive pole post 103, the positive pole post 103 and the positive pole post 2 and the negative pole post 2 are not connected with the positive pole post 102 by using the connecting lugs of the positive pole post 101 and the positive pole post 2, the positive pole post 2 and the positive pole post 2 are not designed to be directly in series.

The utility model utilizes the battery top cover 1 to connect a plurality of core bags 2 in the battery in series, the voltage of the battery is increased by times, and the utility model does not need to design a connecting sheet, and the lugs of the core bags 2 are directly connected with the positive pole post 101, the negative pole post 102 and the connecting terminal 103, thereby increasing the overcurrent capacity and reducing the weight.

As a preferred implementation manner in this embodiment, it should be further explained that a mounting hole communicating with the interior of the housing 3 is formed in the middle of the bottom surface of the housing 3, and the explosion-proof valve 4 is installed in the mounting hole, so that the explosion-proof valve 4 is installed at the bottom of the housing 3, and the battery can be opened downwards under extreme conditions, thereby improving safety.

As a preferred implementation manner in this example, it should be further explained that the explosion-proof valve protection film 5 located below the explosion-proof valve 4 is installed in the installation hole, so that the use of the explosion-proof valve 4 is not affected when the battery is exploded, and a certain protection effect can be provided for the explosion-proof valve 4 in normal times.

As a preferred embodiment in this embodiment, it should be further explained that the inner bottom surface of the housing 3 is provided with a bracket 6, and the first core pack group and the second core pack group are both installed on the bracket 6, so that the overall installation is easier and more stable, and the middle part of the bracket 6 is provided with a through hole communicated with the installation hole, so that the protection film 5 is not affected to play its role.

Finally, it should be noted that the above description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A lithium battery, comprising a battery cover (1), a core pack (2) and a shell (3), characterized in that a first core pack group and a second core pack group arranged along the length direction of the shell (3) are arranged in the shell (3), and the first core pack group and the second core pack group each include two core packs (2) arranged along the width direction of the shell (3); the battery cover (1) is mounted on the upper end of the shell (3), the two ends of the battery cover (1) are respectively provided with a positive electrode column (101) and a negative electrode column (102), and the middle of the battery cover (1) is provided with a positive electrode column (101) and a negative electrode column (102). A connecting terminal (103) electrically connected to both the positive pole (101) and the negative pole (102) is provided; the positive pole tabs of the two core packages (2) in the first core package group are connected to the positive pole (101); the negative pole tabs of the two core packages (2) in the first core package group are connected to the connecting terminal (103); the negative pole tabs of the two core packages (2) in the second core package group are connected to the negative pole (102); and the positive pole tabs of the two core packages (2) in the second core package group are connected to the connecting terminal (103).

2. A lithium battery according to claim 1, characterized in that a mounting hole communicating with the interior of the shell (3) is opened in the middle of the bottom surface of the shell (3), and an explosion-proof valve (4) is installed in the mounting hole.

3. A lithium battery according to claim 2, characterized in that an explosion-proof valve protection film (5) located below the explosion-proof valve (4) is installed in the installation hole.

4. A lithium battery according to claim 2 or 3, characterized in that a bracket (6) is provided on the inner bottom surface of the shell (3), the first core package group and the second core package group are both installed on the bracket (6), and a through hole connected to the mounting hole is opened in the middle of the bracket (6).