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Safe automatic nickel cadmium battery charger circuit

2016-05-10 03:48  
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Safe automatic nickel cadmium battery charger circuit
The circuit is as shown in figure 4-21. The IC2(CD4060) is the 14-bit binary serial counter/frequency divider, the IC2(CD4060) and the VT1, K control the charging time. The C4, R4 are the reset circuit of IC2. IC3 is the 555 manifold block, it forms the oscillator which has small duty ratio, and the pulse constant current charging and discharging circuit is composed of the IC3, VT2, VT3 and VT4. By using this kind of circuit, we can charge the battery with large current to shorten the charging time and eliminate the memory effect of the battery. By changing the R10 and R11, we can change the charging and discharging current. LED2 controls the VT2 and VT3 to do the constant current charging.