Battery control device and battery control method
By using an equivalent circuit model and calculating the charge of capacitor elements, the accuracy problem of battery allowable current detection in the prior art has been solved, and high-precision battery voltage prediction and safety control have been achieved.
CN122095265APending Publication Date: 2026-05-26NIPPON AUTOMOTIVE ENERGY CO LTD
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Patent Information
- Application Number
- CN202580004702.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-09-20
- Filing Date
- 2025-03-31
- Publication Date
- 2026-05-26
AI Technical Summary
Technical Problem
Existing technologies, when detecting the allowable current of a battery, can easily cause the battery voltage to deviate from its upper and lower limits, making it impossible to accurately predict battery voltage changes during high-current charging and discharging.
Method used
Using an equivalent circuit model, combining resistance and capacitance elements, the battery voltage change is predicted by detecting the battery state, calculating the allowable current, and considering the influence of lithium ion distribution.
Benefits of technology
It achieves high-precision calculation of allowable current, preventing the battery voltage from rising or falling sharply, and improving the safety and efficiency of battery charging and discharging.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention is provided with: a current sensor (14) for detecting a battery state; and a battery controller (12) that estimates the SOC of the battery on the basis of the detection data and calculates an allowable current for charging and discharging of the battery. The battery controller calculates the allowable current based on an equivalent circuit model including a resistance element and a capacitance element and a battery data table associating the resistance element, the capacitance element, the battery state, and the SOC. The battery controller determines a local SOC using the estimated SOC as an average SOC on the basis of the average SOC and the amount of charge of the capacitance element, and calculates a permissible current by referring to a battery data table on the basis of the local SOC and the detection data.
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