Lithium battery

Abstract

The utility model belongs to the technical field of lithium ion batteries, and discloses a lithium battery which comprises a battery top cover, core packs and a shell, a first core pack group and a second core pack group are arranged in the shell, and each of the first core pack group and the second core pack group comprises two core packs; the battery top cover is installed at the upper end of the shell, a positive pole and a negative pole are arranged at the two ends of the battery top cover respectively, a connecting terminal is arranged in the middle of the battery top cover, a positive tab of a core bag in the first core bag group is connected with the positive pole, and a negative tab of the core bag in the first core bag group is connected with the connecting terminal; the negative pole lug of the core bag in the second core bag group is connected with the negative pole column; and the positive pole lug of the core bag in the second core bag group is connected with the connecting terminal. According to the utility model, a plurality of core packages are connected in series, the battery voltage is multiplied, a connecting sheet does not need to be designed, and the tabs of the core packages are directly connected with the positive pole, the negative pole and the connecting terminal, so that the over-current capability is improved, and the weight is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium ion batteries, and specifically relates to a lithium battery. Background Art

[0002] With the gradual development of new energy vehicles, the development of batteries is also becoming more and more rapid, and batteries are gradually developing towards high energy density, high volume utilization, and high platform voltage. Currently, there is no battery on the market that can double the platform voltage. Utility Model Content

[0003] The purpose of the utility model is to provide a lithium battery to solve the above problems existing in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A 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 arranged along the length direction of the shell are arranged in the shell, and the first core pack group and the second core pack group each comprise two core packs arranged along the width direction of the shell; the battery top cover is mounted on the upper end of the shell, a positive pole column and a negative pole column are respectively arranged at both ends of the battery top cover, a connecting terminal electrically connected to both the positive pole column and the negative pole column is arranged in the middle of the battery top cover, the positive pole tabs of the two core packs in the first core pack group are both connected to the positive pole column, the negative pole tabs of the two core packs in the first core pack group are both connected to the connecting terminal, the negative pole tabs of the two core packs in the second core pack group are both connected to the negative pole column, and the positive pole tabs of the two core packs in the second core pack group are both connected to the connecting terminal.

[0006] As a preferred technical solution in the utility model, a mounting hole communicating with the interior of the shell is opened in the middle of the bottom surface of the shell, and an explosion-proof valve is installed in the mounting hole.

[0007] As a preferred technical solution in the utility model, an explosion-proof valve protection film located below the explosion-proof valve is installed in the installation hole.

[0008] As a preferred technical solution in the utility model, a bracket is provided on the inner bottom surface of the shell, the first core package group and the second core package group are both installed on the bracket, and a through hole connected to the mounting hole is opened in the middle of the bracket.

[0009] Beneficial effects: The utility model utilizes the battery top cover to connect multiple core packs inside the battery in series, thereby doubling the battery voltage. In addition, the application does not require the design of connecting plates. The pole ears of the core packs are directly connected to the positive pole, the negative pole and the connecting terminal, thereby increasing the current capacity and reducing the weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1It is an explosion diagram of the utility model;

[0011] Figure 2 It is a structural schematic diagram of the utility model.

[0012] In the figure: 1-battery top cover; 101-positive pole; 102-negative pole; 103-connecting terminal; 2-core pack; 3-shell; 4-explosion-proof valve; 5-explosion-proof valve protection film; 6-bracket. DETAILED DESCRIPTION

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the utility model will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation of the utility model.

[0014] Example:

[0015] like Figure 1 and Figure 2 As shown, this embodiment provides a lithium battery, including a battery top cover 1, a core pack 2 and a shell 3, wherein 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, so that a total of four core packs 2 can be arranged; the battery top cover 1 is installed at the upper end of the shell 3, and the two ends of the battery top cover 1 are respectively provided with a positive electrode column 101 and a negative electrode column 102, and a connecting terminal 103 electrically connected to the positive electrode column 101 and the negative electrode column 102 is provided in the middle of the battery top cover 1, and the two core packs in the first core pack group are connected to the positive electrode column 101 and the negative electrode column 102. 2 are connected to the positive electrode pole 101, the negative electrode pole ears of the two core packs 2 in the first core pack group are connected to the connecting terminal 103, the negative electrode pole ears of the two core packs 2 in the second core pack group are connected to the negative electrode pole 102, and the positive electrode pole ears of the two core packs 2 in the second core pack group are connected to the connecting terminal 103. In this way, the battery top cover 1 can be used to connect multiple core packs 2 inside the battery in series, which can increase the battery voltage exponentially. In addition, the present application does not need to design a connecting piece. The pole ears of the core pack 2 are directly connected to the positive electrode pole 101, the negative electrode pole 102 and the connecting terminal 103, thereby increasing the current capacity and reducing the weight.

[0016] The utility model utilizes the battery top cover 1 to connect multiple core packs 2 inside the battery in series, thereby doubling the battery voltage. In addition, the application does not need to design a connecting piece. The pole ears of the core pack 2 are directly connected to the positive pole 101, the negative pole 102 and the connecting terminal 103, thereby increasing the current capacity and reducing the weight.

[0017] As a preferred implementation scheme in this embodiment, it needs to be further explained that a mounting hole connected to 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, and then the explosion-proof valve 4 is installed at the bottom of the shell 3. When the battery is in extreme conditions, the explosion-proof valve 4 can be opened downward to improve safety.

[0018] As a preferred implementation scheme in this embodiment, it needs to be further explained that an explosion-proof valve protection membrane 5 located below the explosion-proof valve 4 is installed in the installation hole, which does not affect the use of the explosion-proof valve 4 when gas explodes inside the battery, and can play a certain protective role for the explosion-proof valve 4 in normal times.

[0019] As a preferred implementation scheme in this embodiment, it needs to be further explained that a bracket 6 is provided on the inner bottom surface of the shell 3, and the first core package group and the second core package group are both installed on the bracket 6, so that the overall installation is easier and more stable, and a through hole connected to the mounting hole is opened in the middle of the bracket 6, which does not affect the protective film 5 to play its role.

[0020] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lithium battery, comprising a battery top cover (1), a core pack (2) and a housing (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 top cover (1) is installed on the upper end of the shell (3), and the two ends of the battery top cover (1) are respectively provided with a positive electrode column (101) and a negative electrode column (102), and the middle part of the battery top cover (1) is provided with a positive electrode column (101) and a negative electrode column (102). The positive pole tabs of the two core packages (2) in the first core package group are connected to the positive pole column (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 column (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 provided 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: The inner bottom surface of the shell (3) is provided with a bracket (6), the first core package group and the second core package group are both mounted on the bracket (6), and a through hole connected to the mounting hole is opened in the middle of the bracket (6).

Images