Battery monitoring apparatus

A battery monitoring apparatus for monitoring a plurality of unit batteries of an assembled battery installed in a vehicle, the unit batteries of the assembled battery being grouped into a plurality of battery blocks,

• the battery monitoring apparatus comprising:
• a battery ECU;
• a plurality of voltage monitors each of which is adapted to be mounted to a corresponding one of the battery blocks;
• and
• a monitor activation device,
• wherein
• the battery ECU is configured to wirelessly transmit commands to the voltage monitors,
• the voltage monitors are configured to detect voltage information of the unit batteries and wirelessly transmit the detected voltage information to the battery ECU, and
• the monitor activation device is configured to sequentially activate the voltage monitors with time lags therebetween in a predetermined order recognized by the battery ECU,
• wherein
• the battery monitoring apparatus is configured so that:
• the voltage monitors sequentially start wireless communication with the battery ECU in the predetermined order in which the voltage monitors are sequentially activated by the monitor activation device;
• and
• the battery ECU assigns IDs, via the wireless communication, sequentially to the voltage monitors in the predetermined order.