Power generation control method and device

By acquiring battery information, calculating the static correction deviation value and SOC reliability, determining the power flow angle coefficient and power correction coefficient, and correcting the power generation, the problem of poor observability of the SOC estimation method for lithium iron phosphate batteries is solved, and precise control of power generation and improved safety are achieved.

CN122339031APending Publication Date: 2026-07-03GUANGDONG FUHUA ENG EQUIP MFG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGDONG FUHUA ENG EQUIP MFG CO LTD
Filing Date
2026-04-14
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

The open-circuit voltage of lithium iron phosphate batteries is relatively flat in the 30%-80% SOC range, resulting in poor observability of SOC estimation methods and large cumulative errors, which affect the accuracy of the range extender's power generation request. Existing methods cannot effectively eliminate cumulative errors, and the BMS cannot provide reliable correction when there are significant deviations.

Method used

By acquiring battery information, calculating the static correction deviation value and SOC confidence, determining the power flow angle coefficient and power correction coefficient, and correcting the power generation to match the actual battery state, a scenario-adaptive power flow angle coefficient is introduced to appropriately reduce or increase the power generation request and avoid overcharging or over-discharging.

Benefits of technology

It improves the accuracy and safety of power generation control, ensures that the power generation request matches the battery status, realizes adaptive correction of operating conditions, avoids battery overcharging or over-discharging, and improves vehicle performance.

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Abstract

This application discloses a power generation control method and apparatus. The method includes: acquiring battery information; calculating a State of Charge (SOC) coefficient based on a static correction deviation value and determining the SOC reliability, wherein the static correction deviation value is determined by the estimated SOC values ​​before and after battery wake-up; determining a power flow angle coefficient based on a power generation reference value and the current battery charge / discharge power, wherein the current battery charge / discharge power is determined by the battery voltage and battery charge / discharge current; determining a power correction coefficient based on the SOC reliability, battery voltage, average battery temperature, and power flow angle coefficient; and correcting the power generation based on the SOC reliability and the power correction coefficient. By correcting the power generation based on the battery voltage, average battery temperature, battery charge / discharge current, and estimated SOC value, the power generation request is always matched to the actual battery state, improving the control accuracy of the power generation.
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