The invention discloses a charging signal detection circuit and a charging signal detection method. The charging signal detection circuit comprises a power supply (101), a constant current source circuit (120), a voltage division circuit (130), a change-over switch (102), a micro-control unit (103) and a vehicle body ground wire (104). The positive electrode of the power supply (101) is connected with the input end of the constant current source circuit (120) and the input end of the voltage division circuit (130), and the output end of the constant current source circuit (120) is connected with a first switching port of the change-over switch (102); an output end of the voltage division circuit (130) is connected with a second switching port of the change-over switch (102), a fixed port of the change-over switch (102) is connected with a first end of the micro-control unit (103), and a second end of the micro-control unit (103) is connected with a vehicle body ground wire (104); when the electric automobile is charged, the fixed port of the change-over switch (102) is further used for being connected with the input end of charging equipment (110), the output end of the charging equipment (110) is connected with an automobile body ground wire (104), and the charging equipment (110) comprises a charging protection resistor (111). According to the charging signal detection circuit, the charging signal can be accurately determined, so that the current charging state of the electric vehicle can be accurately determined.
一种充电信号检测电路及充电信号检测方法,充电信号检测电路包括电源(101)、恒流源电路(120)、分压电路(130)、切换开关(102)、微控制单元(103)和车身地线(104);电源(101)的正极连接恒流源电路(120)的输入端和分压电路(130)的输入端,恒流源电路(120)的输出端连接切换开关(102)的第一切换端口;分压电路(130)的输出端连接切换开关(102)的第二切换端口,切换开关(102)的固定端口连接微控制单元(103)的第一端,微控制单元(103)的第二端连接车身地线(104);当电动汽车进行充电时,切换开关(102)的固定端口还用于连接充电设备(110)的输入端,充电设备(110)输出端连接车身地线(104),其中,充电设备(110)包括充电保护电阻(111)。该充电信号检测电路有利于准确的确定出充电信号,使得精准的确定出电动汽车当前的充电状态。
Charging signal detection circuit and charging signal detection method
充电信号检测电路及充电信号检测方法
2021-09-07
Patent
Electronic Resource
Chinese
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