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Power battery health state detection method and related equipment

A power battery and state of health technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as poor accuracy or convincing power, and achieve the effect of improving safety

Pending Publication Date: 2022-03-01
VOYAH AUTOMOBILE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of this application provides a power battery health status detection method and related equipment, the main purpose is to solve the problem of poor accuracy or persuasiveness of the current power battery health status detection results

Method used

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  • Power battery health state detection method and related equipment
  • Power battery health state detection method and related equipment
  • Power battery health state detection method and related equipment

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Embodiment Construction

[0039] The embodiment of the present application provides a power battery health status detection method and related equipment. This scheme comprehensively judges the power battery health status by detecting the short circuit condition and internal resistance of the single cell, making the detection scheme more specific and more precise detection The internal condition of the power battery.

[0040] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclu...

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Abstract

The invention discloses a power battery health state detection method and related equipment. The method comprises the following steps: acquiring a voltage change value of each single battery cell of the power battery under a detection voltage; under the condition that the voltage change value of each single cell is smaller than a first threshold value, the SOC value of the current power battery and the charging DCIR value and / or the discharging DCIR value of each single cell are / is obtained; and judging the health state of the power battery based on the charging DCIR value and / or the discharging DCIR value and the internal resistance range value of the single cell. According to the scheme, the health state of the power battery is comprehensively judged by detecting the short circuit condition and the internal resistance condition of the single battery cells, so that the detection scheme can detect the internal condition of the power battery more specifically and more finely, the detection result is more persuasive, and the detection result can be used for vehicle control and maintenance; and the safety of vehicle driving is improved.

Description

technical field [0001] This specification relates to the field of new energy vehicles, and more specifically, the present invention relates to a method for detecting the state of health of a power battery and related equipment. Background technique [0002] With the advancement of power battery technology and fast charging technology, users no longer worry about the impact of mileage on driving, and more and more users choose new energy vehicles. However, the safety problem of power batteries is becoming more and more obvious. In recent years, there have been many cases of vehicle out of control, natural or even explosion due to power battery failure. The main reason for the failure is that with the use of the vehicle, the internal short circuit of the power battery or the abnormal resistance of the battery cell, when charging or under high power, the high current causes the local temperature of the faulty power battery to be too high, resulting in the breakdown and deflagra...

Claims

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Application Information

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IPC IPC(8): G01R31/382G01R31/392
CPCG01R31/382G01R31/392Y02T10/70
Inventor 朱金鑫刘振勇金兆鑫黄敏
Owner VOYAH AUTOMOBILE TECH CO LTD
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