The invention relates to the technical field of new energy automobiles, in particular to a charging protection method and device for an electric vehicle and the electric vehicle. The method comprises the steps of detecting whether vehicle charging is started; when it is detected that the vehicle starts to be charged, calculating the total mileage of the vehicle in all the power-on periods; matching the aging characteristics of the power batteries of the vehicle according to the total driving mileage, calculating the maximum allowable charging voltage of the power batteries according to the aging characteristics, and when the actual charging voltage of any single battery in the power batteries is greater than or equal to the maximum allowable charging voltage, controlling the vehicle to stop charging so as to prevent the power batteries from overvoltage. Therefore, the problems that in the related technology, when the vehicle is controlled to stop charging only according to the charging cut-off voltage, once the charging cut-off voltage is not the true maximum allowable charging voltage, overvoltage of the power battery is likely to be caused, the thermal runaway phenomenon is likely to occur, the charging safety is reduced, potential safety hazards are brought to charging of a user, and the charging experience of the user is reduced are solved.
本申请涉及新能源汽车技术领域,特别涉及一种电动汽车的充电保护方法、装置及电动汽车,其中,方法包括:检测车辆是否开始充电;在检测到车辆开始充电时,计算车辆所有上电周期内的总计行驶里程;根据总计行驶里程匹配车辆的动力电池的老化特征,并根据老化特征计算动力电池的最高允许充电电压,在动力电池中任一单体电池的实际充电电压大于或等于最高允许充电电压时,控制车辆停止充电,防止动力电池过压。由此,解决了相关技术中仅根据充电截止电压控制车辆停止充电时,一旦充电截止电压并非真实最高允许充电电压,则容易导致动力电池过压,易出现热失控现象,降低充电的安全性,给用户的充电带来安全隐患,降低用户的充电体验等问题。
Charging protection method and device for electric vehicle and electric vehicle
电动汽车的充电保护方法、装置及电动汽车
03.12.2021
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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