The invention belongs to the technical field of pure electric vehicles, and particularly relates to a whole vehicle power-off control strategy of pure electric vehicles. The whole vehicle power-off control strategy comprises the following steps: when a whole vehicle controller is normally powered off, detecting the state before high-voltage power-off, and automatically judging the power-off by thecontroller of each power system by detecting an input bus voltage after the condition is met; when the whole vehicle controller detects that a serious fault exists currently, carrying out emergency power-off sequence: firstly, requesting the vehicle to enter a power-off mode, and controlling a gearbox to be engaged into a neutral gear position to interrupt power output; carrying out emergency cutting of the output of a power battery and controlling a high-voltage relay of the cut off battery; and disabling DCDC. According to the strategy, the power-off speed of the controller can be increasedon the basis of an existing patent, and the system reliability is guaranteed.
本发明属于纯电动汽车技术领域,具体涉及一种纯电动汽车的整车下电控制策略,整车控制器正常下电时,进行高压下电前的状态检测,满足条件后各动力系统的控制器通过检测输入的母线电压自行判断下电;当整车控制器检测到当前具有严重故障时,紧急下电顺序:先请求车辆进入动力关闭模式,并控制变速箱挂入空挡位置以中断动力输出;紧急切断动力电池输出,控制断开电池的高压继电器;禁用DCDC。本发明策略能够在现有专利基础上加快控制器下电的速度并保证系统可靠性。
Whole vehicle power-off control strategy of pure electric vehicles
一种纯电动汽车的整车下电控制策略
2020-10-02
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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