Battery Control System and Battery Control Method

Abstract

When detecting a fault of a master control device, a slave control device refers to master-device-line information, and obtains line information to establish a connection with the other master control device. The slave control device transmits connection request information to the master control device extracted from the other master control devices. The other master control device determines whether or not it is connectable with the slave control device that has transmitted the connection request information, and transmits a determination result as connectability information. The slave control device switches a communication line to the other master control device when the received connectability information indicates the connectable status.

What is claimed is: 
     
         1 . A method for controlling a battery system, the battery system comprising:
 a plurality of battery modules, each of which has a battery and a slave control device;   a master control device connected to the plurality of slave control devices via a first communication line; and   a battery system managing device connected to the plurality of master control devices via a second communication line,   wherein the slave control devices configure a string for battery modules connected in series, and   wherein if the master control device to which the slave control device is connected suffers a fault, the slave control device and other slave control devices belonging to the same string are connected to the same other master control device.   
     
     
         2 . The method of  claim 1 , wherein
 the master control device determines whether or not the master control device is connectable to all of the slave control devices belonging to the same string, and if connectable, the master control device is connected to all of the slave control devices belonging to the same string.   
     
     
         3 . The method of  claim 1 , wherein
 the master control device determines whether or not the master control device is connectable to all of the slave control devices belonging to the same string, and if not connectable, the slave control device searches other connectable master control device.   
     
     
         4 . The method of  claim 2 , wherein
 the master control device determines whether or not the master control device is connectable to all of the slave control devices belonging to the same string, and if not connectable, the slave control device searches other connectable master control device.