The invention discloses a 48V system low-voltage storage battery charging control method which comprises the following steps: after an automobile is started, an engine control system (EMS) calls a low-voltage storage battery charging MAP to obtain a target voltage of a low-voltage storage battery and sends the target voltage to a CAN network; the DCDC converter obtains the target voltage of the low-voltage storage battery through the CAN network and controls the DCDC converter to output the target voltage to charge the low-voltage storage battery; the low-voltage storage battery charging MAP is a pre-calibrated charging relation table with charging voltage as a variable. The method has the advantages that the charging control of the low-voltage storage battery can be realized on the basis of not using an EBS storage battery sensor, the cost is saved, the control reliability is ensured, and the cost performance is high; the control scheme fully controls charging, discharging, capacity recovery, BSG assistance and other working conditions of the low-voltage storage battery, the whole charging control logic is more reliable, and the requirement for charging control of the low-voltage storage battery is met.
本发明公开了一种48V系统低压蓄电池充电控制方法,在汽车启动后,发动机控制系统EMS调用低压蓄电池充电MAP来获取低压蓄电池的目标电压,并发送至CAN网络,DCDC变换器通过CAN网络获取低压蓄电池的目标电压并控制DCDC变换器输出目标电压为低压蓄电池充电;所述低压蓄电池充电MAP为预先标定的以充电电压为变量的充电关系表。本发明的优点在于:在不用EBS蓄电池传感器的基础上可以实现对于低压蓄电池的充电控制,节约成本的同时保证了控制可靠且具备高性价比;控制方案充分控制低压蓄电池的充电、放电以及能力回收、BSG助力等工况,整个充电控制逻辑更加可靠且满足低压蓄电池的充电控制的要求。
48V system low-voltage storage battery charging control method and automobile
一种48V系统低压蓄电池充电控制方法及汽车
2022-05-24
Patent
Electronic Resource
Chinese
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