The invention relates to the technical field of batteries, in particular to a battery charging current calculation method and device, a medium and a battery management system. The method mainly comprises the steps of obtaining battery basic information and battery charging information; substituting the battery basic information and the charging information into a function that the battery temperature changes along with the charging current, and calculating the charging current; correcting the charging current based on the battery aging state SOH; and feeding back a closed-loop control charging current according to the temperature deviation. According to the invention, the feedforward charging current calculated based on the battery thermal model and the aging state can adapt to different environment temperatures and the aging state of the battery; by setting different charging target cut-off SOC values and target boundary temperature limit values and combining the deviation between the battery temperature and the target temperature limit value, the charging current and temperature rise of the battery can be controlled, so that the aging speed of the battery is controlled, and over-temperature charging or lithium precipitation is avoided.
本发明涉及电池技术领域,特别涉及一种电池充电电流计算方法、装置、介质及电池管理系统。主要手段包括:获取电池基础信息和电池充电信息;将电池基础信息和充电信息代入电池温度随充电电流变化函数,计算充电电流;基于电池老化状态SOH修正充电电流;根据温度偏差反馈闭环控制充电电流。本发明基于电池热模型和老化状态计算得到的前馈充电电流,可以自适应于不同的环境温度和电池的老化状态;通过设定不同的充电目标截止SOC值和目标边界温度限值,结合电池温度和目标温度限值间的偏差,可以控制电池的充电电流和温升,从而控制电池的老化速度,避免充电过温或析锂。
Battery charging current calculation method and device, medium and battery management system
一种电池充电电流计算方法、装置、介质及电池管理系统
2025-02-11
Patent
Electronic Resource
Chinese
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