Electricity storage system and control device

An electricity storage system comprising an electricity storage device having a plurality of storage batteries and a control device which controls charging and discharging of the electricity storage device to charge electric power supplied from an electric power supply and discharge the charged electric power to an external load, wherein

• the control device comprises:
• a receiving unit which receives a storage battery abnormality detection signal which is transmitted by each storage battery when abnormality occurs;
• an outputting unit which outputs, when the storage battery abnormality detection signal indicates abnormality which satisfies a disconnection standard defined in advance, a disconnection instruction signal to a plurality of storage battery breakers provided corresponding to the storage batteries;
• and
• a receiving unit which receives a disconnection report indicating that disconnection of the storage battery breaker is executed.

An electricity storage system comprising:

• an electricity storage device having a plurality of storage batteries;
• a plurality of storage battery breakers provided corresponding to the storage batteries;
• and
• a control device which controls charging and discharging of the electricity storage device to charge electric power supplied from an electric power supply and discharge the charged electric power to an external load, wherein
• the control device disconnects, with the storage battery breakers, at least one of a charge path and a discharge path of all of the storage batteries corresponding to the control device, based on a storage battery abnormality detection signal individually transmitted when each storage battery detects abnormality.