Vehicle battery thermal management method
By obtaining the corrected temperature difference between the predicted and actual temperature at the bottom of the battery, and adjusting the charging and discharging current strategy and temperature difference filtering mode, the problem of lithium-ion precipitation caused by temperature misjudgment under the battery waste heat recovery mode is solved, thereby improving the stability and energy efficiency of the battery safe charging and discharging and thermal management system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHEJIANG GEELY HLDG GRP CO LTD
- Filing Date
- 2026-06-12
- Publication Date
- 2026-07-17
AI Technical Summary
In the thermal management system of electric vehicle batteries, the temperature at the bottom of the battery may be lower than the safe charging temperature threshold and thus go undetected, leading to the risk of lithium ions being deposited on the surface of the battery negative electrode. The existing temperature sensor arrangement is insufficient to deal with temperature misjudgment under the battery waste heat recovery mode.
By obtaining the corrected temperature difference between the expected temperature and the actual temperature at the bottom of the battery, the charging and discharging current strategy is adjusted, the thermal management system is controlled to switch between battery waste heat recovery mode and disabled mode, and the temperature uniformity is adjusted by using the temperature difference filtering mode to ensure safe charging and discharging of the battery.
It effectively reduces the risk of lithium ion deposition during battery charging and discharging, improves battery temperature uniformity and the stability of the thermal management system, reduces energy consumption, and extends battery life.
Smart Images
Figure CN122402318A_ABST