Method for quickly identifying micro short circuit in lithium ion storage battery module

By conducting charge-discharge tests and calculating reference voltages for lithium-ion battery modules, the problem of difficulty in identifying micro-short-circuit signals in existing technologies has been solved, achieving efficient and accurate micro-short-circuit detection and management, and improving the safety and lifespan of lithium-ion battery modules.

CN122109827AActive Publication Date: 2026-05-29CHINA AUTOMOTIVE BATTERY RES INST CO LTD
10 Cites 0 Cited by

Patent Information

Application Number
CN202610294634.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-11
Publication Date
2026-05-29
Estimated Expiration
2046-03-11

AI Technical Summary

Technical Problem

Existing technologies struggle to accurately identify micro-short circuit signals in lithium-ion battery modules, especially during use, making it difficult to detect and manage safety hazards in a timely manner.

Method used

By performing charge and discharge tests on a standard battery module, calculating a reference voltage, and comparing it with the voltage difference value of the battery module under test, a fast identification method is provided to determine whether a micro short circuit signal exists using a preset threshold.

Benefits of technology

It achieves accurate identification of micro-short circuits within lithium-ion battery modules, reduces the false judgment rate, improves the timeliness of identification, and enables online detection and guidance of module design to improve safety and lifespan.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to the field of lithium ion storage battery module detection, and discloses a lithium ion storage battery module internal micro short circuit rapid identification method comprising the following steps: discharging a standard storage battery module to an empty electricity state; the standard storage battery module is charged according to a first system, and the total charging voltage of the standard storage battery module and the charging potential of each single battery cell are obtained; the standard storage battery module is discharged according to a second system, and the total discharge voltage of the standard storage battery module and the discharge potential of each single cell are obtained; calculating a reference voltage according to the charging total voltage of the standard storage battery module, the charging potential of each single battery cell, the discharging total voltage and the discharging potential of each single battery cell; and comparing the value of the voltage of the storage battery module to be detected with the value of the reference voltage to obtain a constant voltage difference value, and comparing the constant voltage difference value with a preset threshold to determine whether the storage battery module to be detected has an internal micro short circuit signal. The internal micro short circuit degree condition in the storage battery module can be quantitatively analyzed, and the testing method is simple and high in accuracy degree.
Need to check novelty before this filing date? Find Prior Art