Charge/discharge control circuit and battery device

摘要

Provided are a charge/discharge control circuit having a self-test function, which can dispense with a complicated test device, and a battery device. The battery device includes the charge/discharge control circuits each including a pull-up/pull-down circuit provided at a terminal to which a secondary battery is to be connected. When a self-test start signal is input so as to enter a self-test state, a self-test control circuit controls the pull-up/pull-down circuit, to thereby perform a test on a voltage detection circuit provided at the terminal to which the secondary battery is to be connected. When the self-test is finished, a self-test start signal is output to a next-stage charge/discharge control circuit, to thereby perform a test sequentially on the voltage detection circuits of the cascade-connected charge/discharge control circuits.

主权项

1. A charge/discharge control circuit for controlling charge/discharge of a plurality of secondary batteries connected in series, the charge/discharge control circuit comprising:
a voltage detection circuit, which is provided at each of terminals to which the plurality of secondary batteries are to be connected; a detection signal output terminal for outputting a detection signal of the voltage detection circuit; a self-test circuit for self-testing a function of the voltage detection circuit after receiving a self-test start signal; and a self-test start signal input terminal configured to receive a signal to cause the self-test circuit to begin self-testing operations and a self-test start signal output terminal configured to output a signal to indicate that self-testing is finished, wherein the self-test start signal input and output terminals facilitate triggering, by a first charge/discharge control circuit, a second charge/discharge control circuit to start self-testing when the first charge/discharge control circuit has finished self-testing.