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Nickel-cadmium battery charge protection circuit diagram

2016-05-10 10:44  
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Nickel-cadmium battery charge protection circuit diagram
Nickel-cadmium rechargeable battery protection circuit is shown as below. The charging part is composed of D1, D2, R2 and BG1. The charge protection circuit is composed of BG2 and R1. When the nickel-cadmium batteries are charging, light emitting diode LED will be lighten. It indicates charging is normal. If the battery polarity is reversed, base BG2 will be negative potential, BG2 stops, BG1 the base potential will be raised, BG1 stops. It will not charge for nickel-cadmium battery, LED will not lit. It indicates the battery polarity is reversal.