Power-storage-system control method and power-storage-system control apparatus

A power-storage-system control method for controlling, through a communications network, power storage systems arranged in a distributed manner, the method comprising:

• obtaining pieces of first parameter information indicating respective states of the power storage systems;
• determining respective degradation levels of the power storage systems by using the obtained pieces of first parameter information;
• grouping the power storage systems into a plurality of groups, based on the determined degradation levels;
• and
• executing at least one of first control and second control, wherein, in the first control, group designation is performed in first descending order of priorities defined for the groups of the power storage systems and corresponding to the degradation levels, the power storage systems belonging to the designated group are charged, and in the second control, group designation is performed in second descending order of priorities defined for the groups of the power storage systems and corresponding to the degradation levels, and the power storage systems belonging to the designated group are discharged.

A power-storage-system control apparatus for controlling, through a communications network, power storage systems arranged in a distributed manner, the apparatus comprising:

• a first parameter obtainer that obtains pieces of first parameter information indicating respective states of the power storage systems;
• a first degradation determiner that determines respective degradation levels of the power storage systems by using the obtained pieces of first parameter information and that groups the power storage systems into a plurality of groups, based on the degradation levels;
• and
• a first controller that executes at least one of first control and second control, wherein, in the first control, group designation is performed in first descending order of priorities defined for the groups of the power storage systems and corresponding to the degradation levels, the power storage systems belonging to the designated group are charged, and in the second control, group designation is performed in second descending order of priorities defined for the groups of the power storage systems and corresponding to the degradation levels, and the power storage systems belonging to the designated group are discharged.

A power-storage-system control apparatus for controlling a power storage system having a plurality of assembled batteries, the apparatus comprising:

• a second parameter obtainer that obtains pieces of second parameter information indicating respective states of the assembled batteries;
• a second degradation determiner that determines respective degradation levels of the assembled batteries by using the obtained pieces of second parameter information and that groups the assembled batteries into a plurality of groups, based on the degradation levels;
• and
• a second controller that executes at least one of first control and second control, wherein, in the first control, group designation is performed in first descending order of priorities defined for the groups of the assembled batteries and corresponding to the degradation levels, and the assembled batteries belonging to the designated group are charged, and in the second control, group designation is performed in second descending order of priorities defined for the groups of the assembled batteries and corresponding to the degradation levels, and the assembled batteries belonging to the designated group are discharged.