Battery residual value display device

A battery residual value display device comprising:

• a battery information receiving module configured to receive a first residual value indicating a state of health (SOH) of a battery that is a display target of a residual value, information on an elapsed time from a time of manufacture of the battery, and information on a service life of the battery;
• an attenuation function determining module configured to determine, by using the information on the elapsed time from the time of manufacture of the battery and the information on the service life of the battery received by the battery information receiving module and an attenuation function indicating a time-dependent change of SOH specific to the battery, an attenuation coefficient that is used for correction of the first residual value of the battery;
• a second residual value determining module configured to correct the first residual value by using the attenuation coefficient to determine a second residual value;
• a graph output module configured to output a graph of which one axis indicates residual values of the battery and another axis indicates the information on the elapsed time from the time of manufacture of the battery;
• and
• a display unit configured to display the graph output from the graph output module,
• wherein the graph output module is configured to output:
• in the graph, a display indicating the first residual value of the battery;
• a display indicating boundaries between a plurality of residual value ranks obtained by dividing the residual values of the battery in accordance with a level of the second residual value;
• and
• a display indicating boundaries between a plurality of groups, indicating types of applications in which the battery can be used, obtained by dividing the plurality of residual value ranks in accordance with the level of the second residual value.