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Lithium ion battery pack and inflation deformation detection and early warning method thereof

A technology for lithium-ion batteries and battery cells, which can be used in electric/magnetic solid deformation measurement, electrical components, secondary batteries, etc., and can solve problems such as inaccurate battery flatulence

Pending Publication Date: 2020-04-28
东莞汇洋动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the device can warn of battery inflation to a certain extent, because its force-sensitive resistor is located between the intervals of the two batteries, it cannot accurately determine which battery has the inflation, and cannot accurately monitor the inflation of the battery. make a replacement or repair

Method used

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  • Lithium ion battery pack and inflation deformation detection and early warning method thereof
  • Lithium ion battery pack and inflation deformation detection and early warning method thereof
  • Lithium ion battery pack and inflation deformation detection and early warning method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as Figure 1~2 As shown, a lithium-ion battery pack includes a battery management system 1 and a plurality of battery cells 2 electrically connected to the battery management system 1, and each battery cell 2 has a The force sensitive resistor 3 is fixed, and the battery management system 1 is provided with an information collection module, and the force sensitive resistor 3 is electrically connected to the information collection module.

[0028] Preferably, the force sensitive resistor 3 is fixed on the outer surface of the packaging edge 21 of the battery cell 2 where the tab 22 is located by the fixing member 4 .

[0029] Preferably, the two tabs 22 of the battery cell 2 are arranged at the same end of the battery cell 2 , and the fixing member 4 is fixed between the two tabs 22 .

[0030] Preferably, the two tabs 22 of the battery cell 2 are arranged at the same end of the battery cell 2 , and the fixing member 4 is fixed between the two tabs 22 .

[0031] Pr...

Embodiment 2

[0035] Such as image 3 As shown, the difference from Embodiment 1 is that the two tabs 22 of the battery cell 2 are arranged at opposite ends of the battery cell 2 , and the fixing member 4 is fixed on one side of one tab 22 . That is, the battery cell 2 has two packaging sides 21 , and the fixing member 4 is disposed on one of the packaging sides 21 .

[0036] The rest are the same as in Embodiment 1, and will not be repeated here.

Embodiment 3

[0038] Such as Figure 4 As shown, the difference from Embodiment 1 is that the two tabs 22 of the battery cell 2 are arranged at opposite ends of the battery cell 2 , and the fixing member 4 is fixed on one side of the two tabs 22 . That is, the battery cell 2 has two packaging sides 21 , and the fixing member 4 is disposed on the two packaging sides 21 at the same time.

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Abstract

The invention belongs to the technical field of lithium ion batteries and particularly relates to a lithium ion battery pack. The lithium ion battery pack comprises a battery management system and a plurality of single batteries electrically connected with the battery management system. A force-sensitive resistor is fixed to an outer surface of a packaging edge where a tab of each single battery is located, an information acquisition module is arranged on the battery management system, and the force-sensitive resistors are electrically connected with the information acquisition module. Besides, the invention also provides an inflation deformation detection and early warning method of the lithium ion battery pack. The method comprises the following steps: S1, presetting a resistance safetythreshold R in the battery management system, acquiring a resistance Rn of each force-sensitive resistor by the information acquisition module, and transmitting information to the battery management system; and S2, comparing the Rn with the R, and when the Rn is greater than or equal to the R, stopping charging and discharging of the lithium ion battery pack by the battery management system. Compared with the prior art, by using the battery pack and the method of the invention, there are advantages that an air inflation condition of the battery can be detected more accurately, and sudden deterioration of a battery cell can be found as soon as possible.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a lithium-ion battery pack and a method for detecting and early warning of inflation deformation thereof. Background technique [0002] Lithium-ion batteries have attracted widespread attention due to their high safety performance, long cycle life, environmental friendliness, and relatively low price, and have been widely used in mobile phones, electric vehicles, and other electric equipment fields. [0003] In actual use of lithium-ion batteries, the battery is often flattened and deformed due to the type of electrode material, unstable film formation, moisture control and other reasons. In the pouch battery, the battery inflation will cause the battery to be unsafe, and it is easy to cause a battery safety accident. At present, in the production of lithium-ion batteries, the deformation of the battery cells is usually checked before the battery cells ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16G01R31/389H01M2/12H01M10/0525
CPCG01R31/389G01B7/18H01M10/0525H01M50/394Y02E60/10
Inventor 许瑞徐作斌王易玮覃关键
Owner 东莞汇洋动力科技有限公司