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Single battery, power battery pack and vehicle

A single battery and casing technology, applied in the field of vehicles, can solve the problems of high use cost, high maintenance cost, and difficult disassembly, etc., and achieve the effects of improving overcurrent, shortening current collection path, and reducing impedance

Active Publication Date: 2020-12-22
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] On the one hand, most of the current single batteries are provided with a positive electrode terminal on one side and a negative electrode terminal on the other side. In this way, when one electrode terminal of the single battery fails, the entire single battery is paralyzed and cannot work normally. , the battery needs to be replaced again, the cost of use is high, and the batteries are bonded with structural glue, which is not easy to disassemble, resulting in high maintenance costs
[0003] On the other hand, when the size of a single battery is large in a certain direction, higher requirements will be placed on the battery's overcurrent capability, and at the same time, the internal resistance will also be large, and there is room for improvement

Method used

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  • Single battery, power battery pack and vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090]The single cell includes a shell and a pole core located in the shell. The two sides of the shell are respectively provided with electrode terminals that are electrically connected to the pole core and extend out of the shell for drawing current. The electrode terminals on each side are 2; there are tabs on the pole core, and the electrode terminals are electrically connected to the pole core through the tabs; L1 is the width of the tabs, L2 is the width of the pole piece, L1 / L2=15, L1=40mm, single battery mark For S1.

Embodiment 2

[0092]Compared with Example 1, the difference is that L1 / L2=20, L1=55mm, and the single battery is marked as S2.

Embodiment 3

[0094]Compared with Example 1, the difference is that L1 / L2=30, L1=50mm, and the single battery is marked as S3.

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PUM

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Abstract

The invention discloses a single battery, a power battery pack and a vehicle, the single battery comprises: a shell, wherein end plates are arranged at the two ends of the shell, each end plate is provided with at least two electrode terminals, and the electrode terminals penetrate through the end plates; a pole core which is contained in the shell, wherein the pole core comprises a plurality of pole pieces, tabs are led out of the centers of the pole pieces in the length direction in the width direction of the pole pieces, and the ends, stretching into the inner sides of the end plates, of the electrode terminals are connected with the corresponding tabs; and the width of the tabs is L1, and the width L2 of the pole piece meets the following conditions: L1 is greater than or equal to 40mmand less than or equal to 120mm, L2 is greater than or equal to 600mm and less than or equal to 1500mm, and L2 / L1 is greater than or equal to 5 and less than or equal to 30. According to the single battery provided by the invention, each end plate of the single battery is provided with at least two electrode terminals, so that the whole pack can be maintained when the single battery breaks down,and the tab led out from the middle is designed, so that a current collecting path can be shortened, overcurrent is improved, and impedance is reduced.

Description

Technical field[0001]The present application relates to the technical field of vehicle manufacturing, in particular to a single battery, a power battery pack having the single battery, and a vehicle having the power battery pack.Background technique[0002]On the one hand, most of the current single batteries have a positive electrode terminal on one side and a negative electrode terminal on the other side. In this way, when one electrode terminal of the single battery fails, the entire single battery is paralyzed and cannot work normally. , The battery needs to be replaced, the use cost is high, and the batteries are bonded by structural glue, which is not easy to disassemble, resulting in excessive maintenance costs.[0003]On the other hand, when the size of a single battery in a certain direction is larger, higher requirements will be imposed on the battery's overcurrent capability, and the internal resistance will also be larger, so there is room for improvement.Summary of the inve...

Claims

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Application Information

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IPC IPC(8): H01M2/30H01M2/26H01M2/10
CPCY02E60/10
Inventor 何科峰江文锋王信月傅文平朱燕
Owner BYD CO LTD
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