The invention discloses an intelligent charging method and system for a starting lithium battery of a hybrid electric vehicle. The method comprises the steps that the information of the electric quantity SOC and the state of health SOH of a starting lithium battery is detected, and when the SOC of the starting lithium battery is smaller than the low electric quantity threshold value of the starting lithium battery, the starting lithium battery sends an intelligent electricity supplementing request to a VCU through a CAN signal to be started; the VCU judges the electric quantity of a power battery, and according to the electric quantity of the power battery, intelligent charging is conducted on the starting lithium battery through a DCDC module; and when the SOC of the starting lithium battery is greater than or equal to a set threshold value of the starting lithium battery, requesting the VCU to quit an intelligent charging mode. According to the scheme provided by the invention, SOC precision judgment conditions are added, and the accuracy and reasonability of a threshold value are ensured; and starting the lithium battery to increase SOH judgment conditions and algorithms, and correspondingly increasing the charging electric quantity along with the increase of the aging degree of the battery to ensure the electric quantity state of the battery.
本发明公开了一种混合动力汽车启动锂电池智能补电方法和系统。其中,方法包括:检测所述启动锂电池的电量SOC和健康状态SOH的信息,当所述启动锂电池的SOC小于启动锂电池的低电量阈值时,所述启动锂电池通过CAN信号向VCU发送智能补电请求开启;所述VCU判断动力电池的电量,根据所述动力电池的电量,通过DCDC模块对所述启动锂电池进行智能补电;当所述启动锂电池的SOC大于或等于启动锂电池的设定阈值时,请求所述VCU退出智能补电模式。本发明提出的方案,增加SOC精度判断条件,保证阈值准确及合理性;启动锂电池增加SOH判断条件及算法,随着电池老化程度增加,补电电量进行相应增加,保证电池电量状态。
Intelligent charging method and system for starting lithium battery of hybrid electric vehicle
一种混合动力汽车启动锂电池智能补电方法和系统
2023-05-12
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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