US Patent 10277051 Electronic device, battery module and charging and discharging method

A battery module includes a crystal lattice type battery, a detection circuit, a control circuit and an excitation circuit. The detection circuit is electrically coupled to the battery. The control circuit is electrically coupled to the detection circuit. The excitation circuit is electrically coupled to the control circuit and the battery. When the battery is charged or discharged, the detection circuit is configured to detect an impedance of the battery. The control circuit is configured to compare the impedance and a threshold. And the control circuit is configured to produce a control signal. The excitation circuit is configured to selectively provide an excitation signal to the battery according to the control signal.