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Method and device for judging internal leakage current of battery, and battery management system

A technology for judging devices and leakage currents, applied to measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as long measurement time, long measurement time, and poor accuracy

Active Publication Date: 2021-08-20
ZHUHAI MAIJU MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The method in the prior art takes a long time to measure, the test conditions are complicated, and the measurement time is long and the accuracy is poor

Method used

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  • Method and device for judging internal leakage current of battery, and battery management system
  • Method and device for judging internal leakage current of battery, and battery management system
  • Method and device for judging internal leakage current of battery, and battery management system

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Embodiment Construction

[0053] The present disclosure will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific implementation manners described here are only used to explain relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only parts related to the present disclosure are shown in the drawings.

[0054] It should be noted that, in the case of no conflict, the implementation modes and the features in the implementation modes in the present disclosure can be combined with each other. The technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings and in combination with implementation manners.

[0055] Unless otherwise specified, the illustrated exemplary embodiments / embodiments are to be understood as exemplary features providing various details of some manner in which the technical idea of ​​the pre...

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Abstract

The invention provides a method for judging internal leakage current of a battery. The method comprises the following steps: acquiring an initial voltage value of terminal voltage of the battery; enabling the battery to carry out current output so as to enable the terminal voltage of the battery to change from the initial voltage value to the target voltage value, and obtaining the output charge quantity of the battery during the current output period; and judging whether internal leakage current exists in the battery or not at least based on the output charge quantity of the battery during the current output period. The invention further provides a device for judging the internal leakage current of the battery, and a battery management system.

Description

technical field [0001] The present disclosure belongs to the technical field of batteries, and particularly relates to a method, device and battery management system for judging internal leakage current of a battery. Background technique [0002] Due to the widespread use of lithium batteries, the safety issues of lithium batteries have become more and more prominent. [0003] There are many failure modes of lithium batteries, among which aging is a failure mode with a long period. [0004] With the aging process, lithium batteries will experience increased internal impedance and increased internal leakage current. However, since the internal leakage current of the lithium battery is a current of <μA level, it is difficult to test. [0005] The test methods in the prior art include the voltage drop method, the capacity decay method, the self-discharge current method, and the side reaction consumption Li+ mole counting method for lithium batteries. [0006] The method i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/52G01R31/385
CPCG01R31/52G01R31/385Y02E60/10
Inventor 不公告发明人
Owner ZHUHAI MAIJU MICROELECTRONICS CO LTD