US Patent 9595842 Electricity storage system
Patent 9595842 was granted and assigned to Hitachi, Ltd. on March, 2017 by the United States Patent and Trademark Office.
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In a system having a plurality of storage batteries equipped with bidirectional invertors respectively, the present invention allows a new storage battery to be easily attached later with a structure in which an inverter control is performed according to a value detected in another storage battery. An electricity storage system of the present invention includes: a current detector (22) that detects a charging/discharging current or charging/discharging power of a first electricity storage system (10) directly or indirectly; a second bidirectional inverter (23) that performs power conversion when charge/discharge of a second storage battery (21) is performed from/to a power system (30); and a control device that controls driving the second bidirectional inverter (23) so as to compensate for charge/discharge of a first storage battery (11) in response to a detected value of the current detector (22).
US Patent 09595842 Electricity storage system US Patent 9595842 Electricity storage system
US Patent 09595842 Electricity storage system
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