Battery testing methods, apparatus, equipment, media and products

By adjusting the battery to its first state of charge at a preset standard temperature and then applying a pulse current after allowing it to stand at the target temperature, the voltage is obtained and corrected to calculate the DC internal resistance. This solves the problems of long test cycles and insufficient accuracy in the prior art, and realizes efficient and low-energy battery DC internal resistance testing.

CN122307391APending Publication Date: 2026-06-30JIANGSU CONTEMPORARY AMPEREX TECH LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU CONTEMPORARY AMPEREX TECH LTD
Filing Date
2026-06-03
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing technologies require repeated adjustments under different temperatures and states of charge when testing the DC internal resistance of batteries, resulting in long testing cycles, low efficiency, high energy consumption, and insufficient testing accuracy.

Method used

By adjusting the battery to the first state of charge at a preset standard temperature and then applying a pulse current after it has been left to stand at the target temperature, a first pulse voltage and a second pulse voltage are obtained. The second pulse voltage is then corrected using the first pulse voltage, and the DC internal resistance of the battery at the target temperature and under different states of charge is calculated.

Benefits of technology

It enables DC internal resistance testing at arbitrary temperatures and under any charged state, significantly shortening the testing cycle, reducing energy consumption, and improving testing accuracy.

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Abstract

This application discloses a battery testing method, apparatus, device, medium, and product. The method includes: acquiring a first pulse voltage of the battery under a target temperature and a first state of charge, during the application of a preset pulse current, wherein the first state of charge is obtained by adjusting the battery at a preset standard temperature; acquiring a first voltage of the battery under a target temperature and a second state of charge, and a second pulse voltage under the application of a preset pulse current, wherein the second state of charge is obtained by adjusting the battery at a target temperature, and the second state of charge is any state of charge different from the first state of charge; determining a third pulse voltage based on the first pulse voltage and the second pulse voltage; and determining the DC internal resistance of the battery under the target temperature and the second state of charge based on the first voltage, the third pulse voltage, and the preset pulse current. This allows for rapid detection of the DC internal resistance of the battery under any temperature and any state of charge.
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