Communication circuit among battery groups based on series battery groups and communication method

The invention provides a communication circuit among battery groups based on series battery groups and a communication method, wherein the circuit comprises a first subunit and a second subunit, a first switch device, a second switch device, a first voltage-stabiliser tube, a second voltage-stabiliser tube, a first adjusting resistor and a second adjusting resistor; the first switch device controls the switch by the signal output after measuring the series battery groups in the first subunit; the second switch device controls the switch by the signal output after measuring the series battery groups in the second subunit; the first voltage-stabiliser tube, the first adjusting resistor and the second switch device are connected in series between a high level and a low level in order; the second switch device, the second adjusting resistor and the second voltage-stabiliser tube are connected in series in order between the high level and the low level; the output signal of the first switch device is input in the second subunit through the second adjusting resistor; and the output signal of the second switch device is input in the first subunit through the first adjusting resistor.