OPPOSING CONTACTORS FOR ENERGY STORAGE DEVICE ISOLATION

摘要

An energy storage system can include an energy storage device, such as a battery energy storage device, having a first terminal and a second terminal. A first unidirectional contactor can be coupled to the first terminal. A second unidirectional contactor can be coupled to the second terminal. The first unidirectional contactor can be coupled to the energy storage device with opposite polarity relative to the second unidirectional contactor. The first unidirectional contactor and the second unidirectional contactor can be controlled based on direction of current flow associated with the energy storage device.

主权项

1. A method for controlling a plurality of contactors in an energy storage system having a first unidirectional contactor coupled to a first terminal of an energy storage device and a second unidirectional contactor coupled to a second terminal of the energy storage device, the first unidirectional contactor coupled to the energy storage device with opposite polarity relative to the second unidirectional contactor, the method comprising:
determining a isolating condition for the energy storage device; determining a direction of current flow associated with the energy storage device; and controlling operation of the first unidirectional contactor and the second unidirectional contactor based at least in part on the direction of current flow associated with the energy storage device.