Abstract: The present disclosure discloses a bidirectional isolated DC-DC converter, which includes two ports, two voltage and current isolated acquisition units, a processing module, two filtering-circuit units, and a bidirectional power-converting module. One of the two ports is selectively used as an input terminal of the bidirectional isolated DC-DC converter, and another of the two ports is used as an output terminal. The two voltage and current isolated acquisition units are connected with the two ports respectively to sample voltages and currents at the two ports and generate corresponding feedback signals. The processing module receives the feedback signals and outputs corresponding control signals according to the feedback signals. The bidirectional power-converting module is connected via the two voltage and current isolated acquisition units to the two ports to perform the conversion of different voltages between the two ports according to the control signals output by the processing module.

Abstract: The present disclosure discloses a bidirectional isolated DC-DC converter, which comprises two ports, two voltage and current isolated acquisition units, a processing module, two filtering-circuit units, and a bidirectional power-converting module. One of the two ports is selectively used as an input terminal of the bidirectional isolated DC-DC converter, and another of the two ports is used as an output terminal. The two voltage and current isolated acquisition units are connected with the two ports respectively to sample voltages and currents at the two ports and generate corresponding feedback signals. The processing module receives the feedback signals and outputs corresponding control signals according to the feedback signals. The bidirectional power-converting module is connected via the two voltage and current isolated acquisition units to the two ports to perform the conversion of different voltages between the two ports according to the control signals output by the processing module.

Abstract: A battery balancing circuit, system and method are disclosed. The battery balancing circuit comprises a plurality of individual batteries, a plurality of first switches, a plurality of second switches, a first control element, a second control element and a transformer. By controlling the first switch and the second switch to be turned on and controlling the first control element and the second control element to be selectively turned on, when the energy in the individual battery is excessive, the excessive energy in the individual battery is transferred to the buffering battery pack; and when the energy in the individual battery is insufficient, the individual battery absorbs energy from the buffering battery pack. In this way, the balance among individual batteries in the battery pack is accomplished and the service life of the battery pack is prolonged.