The invention discloses a power battery heating method, a power battery heating device and an electric vehicle. The method comprises the following steps of: firstly, acquiring maximum alternating-current power capable of being output by each driving unit under different target charging and discharging frequencies and corresponding vibration noise indexes, and determining the corresponding target charging and discharging frequency as a frequency reference value when the vibration noise indexes are smaller than a preset threshold value and the sum of the maximum alternating-current power output by each driving unit is the maximum value; obtaining the alternating current phase of the bus current of any one of the driving units, and determining the obtained alternating current phase of the bus current as a phase reference value; then, the charging and discharging frequency of each driving unit is adjusted according to the frequency reference value, so that the charging and discharging frequency of each driving unit is consistent with the frequency reference value; and adjusting the AC phase of the bus current of each driving unit according to the phase reference value, so that the AC phase of the bus current of each driving unit is consistent with the phase reference value. The invention aims to improve the heating efficiency of the multi-drive unit power battery.
本发明公开一种动力电池加热方法、动力电池加热装置及电动汽车。先获取各驱动单元在不同目标充放电频率下能输出的最大交流功率以及相应的振动噪声指标,并将满足振动噪声指标小于预设阈值,且各驱动单元输出的最大交流功率之和最大值时对应的目标充放电频率确定为频率参考值;获取各驱动单元中的任意一者的母线电流的交流相位,并将获取到的母线电流的交流相位确定为相位参考值;然后根据频率参考值调节各个驱动单元的充放电频率,以使各驱动单元的充放电频率与频率参考值一致;根据相位参考值调节各个驱动单元的母线电流的交流相位,以使各驱动单元的母线电流的交流相位与相位参考值一致。本发明旨在提高多驱动单元动力电池的加热效率。
Power battery heating method, power battery heating device and electric vehicle
动力电池加热方法、动力电池加热装置及电动汽车
2024-04-02
Patent
Electronic Resource
Chinese
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