The embodiment of the invention discloses a battery charge quantity determination method and device, equipment, a medium and a vehicle. The method comprises the following steps: for each battery cell, recording a first accumulative charging amount of the battery cell from reaching a preset voltage threshold to reaching a charging end voltage value under the condition that the dynamic voltage of the battery cell is detected to reach the preset voltage threshold; a first difference value between the second accumulated charging amount and the first accumulated charging amount is calculated, the ratio of the first difference value to the nominal capacity of the battery cell is determined as the first electric charge amount, and the second accumulated charging amount is the accumulated charging amount of the battery cell from reaching the preset voltage threshold value to reaching the full charge cut-off voltage; calculating a second difference value between the full charge quantity and the first charge quantity, and determining the second difference value as a second charge quantity when the battery cell reaches the charging end voltage value; and determining the charge quantity of the battery according to the plurality of second charge quantities corresponding to the plurality of battery cells. According to the method, the calibration error of the battery charge quantity can be reduced, so that the problem of large control error of the discharge power of the battery caused by inaccurate calibration of the battery charge quantity is relieved, and the risk of vehicle undervoltage in the driving process of the electric vehicle is reduced.
本申请实施例公开了一种电池电荷量确定方法、装置、设备、介质及车辆。该方法包括:对于每一电芯,在检测到电芯的动态电压达到预设电压阈值的情况下,记录电芯从达到预设电压阈值至达到充电结束电压值的第一累计充电量;计算第二累计充电量与第一累计充电量的第一差值,将第一差值与电芯的标称容量的比值确定为第一电荷量,其中,第二累计充电量为电芯从达到预设电压阈值至达到满充截止电压的累计充电量;计算满充电荷量与第一电荷量的第二差值,将第二差值确定为电芯达到充电结束电压值时的第二电荷量;根据多个电芯对应的多个第二电荷量,确定电池电荷量。本申请能够减小电池电荷量的标定误差,进而缓解由于电池电荷量标定不准确导致的电池的放电功率控制误差大的问题,降低电动汽车在行驶过程中出现车辆欠压现象的风险。
Battery charge quantity determination method and device, equipment, medium and vehicle
电池电荷量确定方法、装置、设备、介质及车辆
2024-04-26
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES |
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