Prevent overcharge protection circuit and over-discharge circuit and accumulators control device and independent power supply system and battery pack

摘要

[Challenge] low current consumption, low price, and resume charging immediately overcharge determination voltage is not significantly impacted by the amount of charging current, the voltage of the power storage device After lowering, the problem of heat generation does not occur in the switching element , to provide overcharge protection circuit of independent power supply system for using natural energy such as solar power. A overcharge protection circuit, the first overcharge basic decision circuit 41, the second over-charge basic decision circuit 42, the circuit 43 functions as a flip-flop, having a first switching element 151, a first overcharge basic decision circuit 41, the second over-charge basic decision circuit 42, is converted into potential by applying a current which is obtained by converting the current flowing through the diode group is amplified copies of bipolar transistors in a resistive load, and their potential is input to circuit 43 which functions as a flip-flop, the potential of the node in the circuit 43 which functions as a flip-flop, said first switching element is controlled. [Selection Figure] Figure 2