The invention relates to a charging control circuit in a vehicle-mounted charger, and belongs to the technical field of vehicle-mounted charging. The charging control circuit comprises a charging detection module, a switch module and a high level maintaining circuit, wherein the switch module comprises N-MOS transistors Q1 and Q2 and resistors R31, R2' and R32, one end of the R2' is connected with a drain electrode of the Q2, the other end of the R2' is connected with input of a power supply, a source electrode of the Q2 is grounded, the R31 and the R32 are connected in series and then are bridged between the input of the power supply and a ground wire, a gate electrode of the Q2 and a drain electrode of the Q1 are connected with connection points of the R31 and the R32, a source electrode of the Q1 is grounded, a gate electrode of the Q1 is connected with a signal detection point b of the high-level maintaining circuit and a signal output end a of the charging detection module, and the high level maintaining circuit is bridged between the power supply and the ground wire. By adopting the charging control circuit, the MOS transistor Q2 in the switch module can replace an S2 in the prior art, and the effect of controlling the charging process is achieved.
本申请涉及一种车载充电机内的充电控制电路,属于车载充电技术领域,所述充电控制电路包括充电检测模块、开关模块和高电平维持电路;开关模块包括N‑MOS管Q1和Q2、电阻R31、R2’、R32,R2’的一端和Q2的漏极相连,另一端与电源输入相连,Q2的源极接地,R31和R32串联后跨接在电源输入和地线之间,Q2的栅极、Q1的漏极与R31和R32的连接点相连,Q1的源极接地,Q1的栅极与高电平维持电路的信号检测点b,以及充电检测模块的信号输出端a相连,高电平维持电路跨接在电源和地线之间。采用本申请,可以通过开关模块中的MOS管Q2代替现有技术中的S2,达到对充电过程的控制效果。
Charging control circuit in vehicle-mounted charger, charging control system and charging control method
一种车载充电机内的充电控制电路、充电控制系统及方法
2021-06-01
Patent
Electronic Resource
Chinese
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