Patent ID: 11863003
Assignee: LG ELECTRONICS INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 14:
15. An energy storage apparatus comprising:
a battery; and
a power converting device configured to receive direct current (DC) voltage from a power generation device or from the battery, charge the battery based on the received DC voltage from the power generation device, and convert the received DC voltage and output the converted voltage,
wherein the power converting device includes:
a first input terminal electrically coupled to the battery;
a second input terminal electrically coupled to the power generation device; and
a switching module including a plurality of upper arm switching elements connected in parallel between a first node and a second node and a plurality of lower arm switching elements connected in parallel between a third node and a fourth node, and configured to switch between at least one of a first DC voltage between the first input terminal and a DC link capacitor and a second DC voltage between the second input terminal and the DC link capacitor;
a first relay switch provided between the first input terminal and the switching module; and
a second relay switch provided between the second input terminal and the switching module, and

wherein each of the first relay switch and the second relay switch is electrically connected to the third node, and
wherein DC voltage to charge the battery is provided by the DC link capacitor to the battery via at least one of the plurality of upper arm switching elements of the switching module.