Electricity storage system and electricity storage unit
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsMOTOJI TAKEUCHI, MASASHI OKUMURA, TETSUYA KAWASAKI, TAKUYA HIROTA
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Abstract
Each of controllers provided in electricity storage units connected in parallel to one another is configured to acquire a discharge voltage of an electricity storage pack provided in another electricity storage unit from another controller by communication, and adaptively control an output of a DC/DC converter provided in an electricity storage unit including the controller such that discharge voltages of electricity storage packs provided in the electricity storage units approach one another.
Claims8
An electricity storage system comprising
- a plurality of electricity storage units connected in parallel to one another, the plurality of electricity storage units configured to be connected to a direct-current (DC) bus connected to a load, wherein
- each of the plurality of electricity storage units includes:
- an electricity storage pack;
- a DC/DC converter configured to charge and discharge the electricity storage pack;
- and
- a controller configured to control the DC/DC converter, and
- the controller is configured to:
- acquire a discharge voltage of another electricity storage pack of another electricity storage unit from another controller by communication;
- and
- adaptively control an output of the DC/DC converter provided in an electricity storage unit out of the plurality of electricity storage units which includes the controller such that discharge voltages of a plurality of the electricity storage packs provided in the plurality of electricity storage units approach one another.
An electricity storage unit configured to be connected in parallel to another electricity storage unit, the electricity storage unit and the another electricity storage unit being configured to a direct-current (DC) bus connected to a load, the electricity storage unit comprising:
- an electricity storage pack;
- a DC/DC converter configured to charge and discharge the electricity storage pack;
- and
- a controller configured to control the DC/DC converter, wherein
- the another electricity storage unit includes:
- another electricity storage pack;
- another DC/DC converter configured to charge and discharge the other electricity storage pack;
- and
- another controller configured to control the another DC/DC converter, and the controller is configured to:
- acquire a discharge voltage of the another electricity storage pack of the another electricity storage unit from the another controller by communication;
- and
- adaptively control an output of the DC/DC converter such that discharge voltages of a plurality of electricity storage packs provided in a plurality of electricity storage units connected in parallel to one another approach one another.
Dependencies are inferred from the claim text.