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Battery Discharging Control Indication Circuit

2016-05-11 16:59  
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Battery Discharging Control Indication Circuit
The above picture is battery discharging control indication circuit and its overdischarging circuit is composed of R1,RP and VDw.R3,C2,VT2 and VT3 constitute overdischarging indication circuit.Battery voltage R1 and RP division voltage break down VDw,which make the VT2 getfull and conduct and the 1.3 openning touch point conducts and overlaod R1 works when the switch turns on.R1 and RP can not break down VDw,which can not make VT1 get full and condcut and the relay stops working when the battery voltage decreases to 10~10.5V.