Lead-acid battery monitoring device and lead-acid battery monitoring method

A lead-acid battery monitoring method, performed by a management unit that includes a processor and a storage storing a program causing the management unit to execute steps comprising:

• sequentially wirelessly communicating with a plurality of monitoring units, which are attached to a plurality of lead-acid batteries connected in series and/or in parallel;
• executing a first monitoring operation in which the management unit sequentially receives monitoring data including an internal resistance and a temperature of each lead-acid battery from the plurality of monitoring units, wherein the wireless communication connection between the management unit and the monitoring unit that has sent the monitoring data to the management unit is disconnected;
• and
• following the disconnection, executing a second monitoring operation in which the management unit sequentially receives monitoring data including the temperature of each lead-acid battery from the plurality of monitoring units.

A lead-acid battery monitoring device comprising:

• a plurality of monitoring units, which are attached to a plurality of lead-acid batteries connected in series and/or in parallel, to measure monitoring data;
• and
• a management unit that includes a processor and a storage storing a program causing the management unit to sequentially establish wireless communication connection with the plurality of monitoring units,
• wherein the processor further executes the program to cause the management unit to perform:
• a first monitoring operation in which the management unit sequentially receives monitoring data including an internal resistance and a temperature of each lead-acid battery from the plurality of monitoring units, wherein the wireless communication connection between the management unit and the monitoring unit that has sent the monitoring data to the management unit is disconnected, and
• following the disconnection, a second monitoring operation in which the management unit sequentially receives monitoring data including the temperature of each lead-acid battery from the plurality of monitoring units, and
• wherein:
• the second monitoring operation is executed at timing different from execution timing of the first monitoring operation, and
• the lead-acid battery monitoring device estimates a degradation of the lead-acid battery using an average temperature of a predetermined period obtained from temperatures at a plurality of time points of the each lead-acid battery.