The invention provides a charging and discharging control method and device of a power battery pack and the power battery pack, the power battery pack comprises a plurality of single battery cells, and the method comprises the following steps: obtaining output voltages and temperature values of the plurality of single battery cells, and sorting the plurality of output voltages according to a sequence to obtain an output voltage sequence; determining the single cells corresponding to the output voltages of which the serial numbers are smaller than or equal to the number of the target cells in the output voltage sequence as characteristic cells; calculating an average value of the output voltages of all the characteristic monomers to obtain a characteristic monomer voltage; calculating the average value of the temperature values of all the characteristic monomers to obtain the temperature of the characteristic monomers; querying a charging cut-off voltage and a discharging cut-off voltage corresponding to the temperature of the characteristic monomer according to a temperature-voltage mapping relation; and controlling the power battery pack to stop charging or discharging when the power battery pack is in a charging and discharging state and the characteristic monomer voltage reaches the corresponding cut-off voltage. The method solves the problem that the calculation load of the power battery pack is large.
本申请提供了一种动力电池包的充放电控制方法、控制装置和动力电池包,动力电池包包括多个单体电芯,该方法包括:获取多个单体电芯的输出电压和温度值,并对多个输出电压按照顺序进行排序,得到输出电压序列;将输出电压序列中序号小于或者等于目标电芯数量的输出电压对应的单体电芯确定为特征单体;计算所有的特征单体的输出电压的平均值得到特征单体电压;计算所有的特征单体的温度值的平均值,得到特征单体温度;根据温度‑电压映射关系查询特征单体温度对应的充电截止电压和放电截止电压;在动力电池包处于充放电状态且特征单体电压达到对应截止电压的情况下,控制动力电池包停止充电或放电。该方法解决了动力电池包计算负荷大的问题。
Charging and discharging control method and control device of power battery pack and power battery pack
动力电池包的充放电控制方法、控制装置和动力电池包
2024-02-20
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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