Storage battery system

摘要

The storage battery system includes a storage battery comprising a plurality of battery modules; a plurality of voltage monitoring circuits for monitoring a voltage of the battery module; and a control device that controls charging and discharging of the storage battery on the basis of monitoring information that is obtained by carrying out communication with the voltage monitoring circuits, wherein the control device comprises a determination unit that calculates an estimated output voltage of the storage battery by using the monitoring information that is obtained from any one of the voltage monitoring circuits before occurrence of a communication failure in a case where the communication failure with any one of the voltage monitoring circuits occurs, and compares the estimated output voltage and an output voltage of the storage battery after occurrence of the communication failure to determine an abnormal site of the communication failure.

主权项

1. A storage battery system comprising:
a storage battery comprising a plurality of battery modules, each of the plurality of battery modules being configured by connecting battery cells in series; a plurality of voltage monitoring circuits for monitoring a voltage of the battery module, each of the plurality of voltage monitoring circuits being provided in accordance with each of the battery modules; and a control device that is connected to the voltage monitoring circuits in a circular shape and controls charging and discharging of the storage battery on the basis of the voltage of the battery module that is obtained by carrying out communication with the voltage monitoring circuits, wherein the control device comprises a determination unit that calculates an estimated output voltage of the storage battery by using the voltage of the battery module that is obtained from any one of the voltage monitoring circuits before occurrence of a communication failure in a case where the communication failure with any one of the voltage monitoring circuits occurs, and compares the estimated output voltage and an output voltage of the storage battery after occurrence of the communication failure to determine an abnormal site of the communication failure, and wherein the determination unit calculates the estimated output voltage by multiplying the voltage of the battery module obtained from any one of the voltage monitoring circuits by a value obtained by dividing a total number of the battery cells provided in the storage battery by a number of the battery cells provided in the battery module.