The invention belongs to the technical field of electric vehicle braking, and particularly relates to a braking control method and device for a two-wheel drive electric vehicle. The brake control method comprises the following steps that a brake pedal position signal, the current vehicle speed V and the current battery charge state value SOC are obtained, and the brake pedal stroke Ba is calculated; judging whether the current vehicle speed V, the current battery state-of-charge value SOC and the brake pedal travel Ba meet a preset relational expression at the same time or not; if yes, the relation between the current vehicle speed V and a preset maximum vehicle speed threshold value Vhigh is judged, and one of two parallel brake control modes is selected for control according to the judgment result; and if not, correspondingly controlling the friction braking torque of the driving shaft and the non-driving shaft. According to the braking control method and device, when the vehicle speed is low, the electric circulation between the motor and the battery is reduced by reducing the proportion of the braking torque of the motor in the total braking torque, and the service life of the battery is prolonged while the energy recovery efficiency is considered.
本申请属于电动车制动技术领域,具体涉及一种用于两轮驱动电动车的制动控制方法及装置;其中,制动控制方法包括如下步骤:获取刹车踏板位置信号、当前车速V、当前电池荷电状态值SOC,并计算刹车踏板行程Ba;判断当前车速V、当前电池荷电状态值SOC以及刹车踏板行程Ba是否同时满足预设关系式;如果满足,则判断当前车速V与预设的最高车速阈值Vhigh的关系,并根据判断结果选择两种并列的制动控制方式的一种进行控制;不满足,则对驱动轴和非驱动轴的摩擦制动力矩大小进行相应控制。本申请的制动控制方法及装置,在较低车速时,通过减少电动机制动力矩在总制动力矩中的占比,来减少电机与电池间的电循环,在兼顾能量回收效率的同时,改善电池使用寿命。
Brake control method and device for two-wheel drive electric vehicle
用于两轮驱动电动车的制动控制方法及装置
2023-03-31
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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