Control method and device for formation and capacity grading power supply current, storage medium and product

By combining the battery electromotive force, internal resistance, and line impedance to calculate the voltage increment, and combining it with a dual-loop PID control algorithm, the problems of slow response speed and poor stability of the cascaded power supply are solved, achieving a control effect of fast response and stable output current.

CN122092472APending Publication Date: 2026-05-26ZHUHAI TITANS NEW POWER ELECTRONICS CO LTD
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Patent Information

Application Number
CN202610215278.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-13
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In the existing battery formation and capacity testing process, the output current response speed of the charging and discharging power supply is slow and the stability is poor. Traditional PID control is prone to oscillation when improving the response speed, making it difficult to balance fast response and stability.

Method used

By acquiring the current increment in the target adjustment command, and combining it with the battery electromotive force, internal resistance, and line impedance of the previous cycle of the sectionalizing power supply, the voltage increment is calculated to adjust the output current. A dual-loop PID control algorithm is used for real-time feedback correction to avoid relying on increasing the proportional coefficient to improve the response speed.

Benefits of technology

It achieves improved response speed while ensuring output current stability, enhances current tracking accuracy and steady-state control accuracy, avoids output current oscillation, and meets the high-performance control requirements of high-end lithium battery formation and capacity testing processes.

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Abstract

The embodiment of the invention discloses a formation and capacity grading power supply current control method and device, a storage medium and a product, and the method comprises the steps: obtaining a target adjustment instruction, the target adjustment instruction comprises a target current increment, and the target current increment is a difference value between a first preset current and a second preset current, the first preset current is the target current of the previous adjustment period, and the second preset current is the target current of the current adjustment period; acquiring a voltage increment according to a plurality of target parameters and the target current increment, the plurality of target parameters including battery electromotive force, battery internal resistance and line impedance of the formation and capacity grading power supply in a stable state in a previous regulation period, and acquiring a regulation variable according to the voltage increment, and adjusting the output current of the formation and capacity grading power supply according to the adjusting quantity. The method can improve the response speed while ensuring the stability of the output current of the charging and discharging power supply.
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