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Method for monitoring and protecting lithium precipitation of lithium ion battery

A lithium-ion battery and lithium analysis technology, applied in the field of lithium-ion batteries, can solve problems such as poor battery safety, achieve good safety, low maintenance difficulty, and overcome the effect of high maintenance difficulty

Inactive Publication Date: 2019-04-23
RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a monitoring and protection method for lithium-ion battery lithium analysis in view of the above defects, so as to solve the problem of poor battery safety caused by battery lithium analysis in the prior art, and achieve a good safety effect

Method used

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  • Method for monitoring and protecting lithium precipitation of lithium ion battery
  • Method for monitoring and protecting lithium precipitation of lithium ion battery

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Embodiment

[0031] Adopt the method of the present invention to carry out lithium analysis monitoring and protection on the charging process of the 0 degree 0.15C charge-discharge cycle test of the battery, when the potential of the negative electrode relative to the reference electrode drops to the lithium analysis warning value, the charging stops, and the discharge step is transferred to, Cycle 50 times. For test results see figure 1 ,Table 1.

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Abstract

The present invention discloses a method for monitoring and protecting lithium precipitation of a lithium ion battery. The method comprises the steps of: in a charging process of a lithium ion battery, monitoring the potential change of a negative electrode of the lithium ion battery relative to a reference electrode online; when the potential of the negative electrode is reduced to a lithium precipitation warning value relative to the potential of the reference electrode, stopping charge or changing a charge policy to achieve monitoring and protection of the lithium precipitation of the lithium ion battery. According to the scheme, the defects are overcome that the maintenance is difficult, the service life is short and the safety is poor, and the method for monitoring and protecting lithium precipitation of the lithium ion battery is small in maintenance difficulty, long in service life and good in safety.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a monitoring and protection method for lithium analysis of lithium ion batteries. Background technique [0002] As the oil energy crisis continues to rise and the environmental hazards caused by fuel oil continue to worsen, the development of new energy vehicles continues to accelerate. Among them, electric vehicles have become one of the development directions of new energy vehicles. The power lithium-ion battery has become the main source of power for electric vehicles due to its high specific energy, good cycle performance and no memory effect. [0003] However, an important factor that affects the service life and safety performance of lithium-ion batteries is the lithium analysis of the battery. Especially when the battery is operated at a high rate and low temperature, the lithium deposition of the battery is one of the main reasons for the abnor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42
CPCH01M10/42H01M10/425Y02E60/10
Inventor 吴宁宁刘建红吴可孙影
Owner RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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