Patent ID: 11955898
Assignee: DELTA ELECTRONICS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A charging and discharging device, comprising:
a transformer comprising a primary winding and multiple secondary windings, which comprises at least a first secondary winding and a second secondary winding;
multiple ports electrically connected to the primary winding and the multiple secondary windings of the transformer, respectively, wherein the multiple ports at least comprise:
a first port electrically connected to the primary winding via a first conversion circuit, the first port is a DC port;
a second port electrically connected to the first secondary winding via a second conversion circuit; and
a third port electrically connected to the second secondary winding via a third conversion circuit;
a first filter capacitor connected in parallel to the first port; and
a first controllable switch connected between the first conversion circuit and the primary winding;
wherein a voltage at the first port of the charging and discharging device is a first voltage, a voltage at the second port is a second voltage, and a voltage at the third port is a third voltage,
wherein the first port is electrically connected to a first charging and discharging unit, the second port is electrically connected to a second charging and discharging unit, and the third port is electrically connected to a third charging and discharging unit; a first winding portion between a first end and a third end of the first secondary winding has a first turn number, a second winding portion between the third end and a second end of the first secondary winding has a second turn number, a second controllable switch is connected between the first winding portion and the second conversion circuit, and a third controllable switch is connected between the second end of the first secondary winding and the second conversion circuit;
wherein when the charging and discharging device is in a working mode where the first charging and discharging unit charges the second charging and discharging unit and the third charging and discharging unit simultaneously, or a working mode where the second charging and discharging unit is discharged to the first charging and discharging unit while charging the third charging and discharging unit, the first controllable switch and the third controllable switch are on, and the second controllable switch is off; and
when the charging and discharging device is in a working mode where the second charging and discharging unit supplies the third charging and discharging unit or a working mode where the third charging and discharging unit pre-charges the second charging and discharging unit, the first controllable switch and the third controllable switch are off, and the second controllable switch is on.