Charging control system and device

摘要

A charging control system for charging a secondary battery from a solar battery, including a first path for transmitting power from the solar battery to the secondary battery, a second path for sensing the voltage of the secondary battery, and a comparison unit for comparing the solar battery voltage with the sensed voltage of the secondary battery. The first path includes a first interrupter, controlled by the comparison unit, which interrupts the first path to prevent discharge of the secondary battery through the solar battery when the solar battery voltage falls below the secondary battery voltage. The second path includes a second interrupter that interrupts the second path after the first path is interrupted, to prevent the secondary battery from discharging through the second path when not being charged through the first path.

主权项

1. A semiconductor device comprising:
a first interrupter connected to a first terminal electrically connected to an anode of a secondary battery and a second terminal electrically connected to a cathode of the secondary battery, the first interrupter switching a first path connecting the first terminal and the second terminal between an electrically connected state and an electrically interrupted state on the basis of a bias voltage; a second interrupter connected to a third terminal electrically connected to an anode of a solar battery and the first terminal, the second interrupter switching a second path connecting the third terminal and the first terminal between an electrically connected state and an electrically interrupted state on the basis of a result of comparison between a first control voltage based on an output of the secondary battery and a second control voltage based on an output of the solar battery; and a constant current biasing circuit electrically connected to the third terminal, the constant current biasing circuit generating the bias voltage based on the output of the solar battery.