Patent ID: 11901525
Assignee: DENSO CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 10:
11. A battery monitoring system for monitoring states of battery cells connected in series to each other so as to form a series connection of battery cells, the battery monitoring system comprising:
at least one current detection unit configured to detect a current value of the series connection of battery cells;
satellite units each associated (i) with one series connection of two or more battery cells included in the series connection of battery cells or (ii) with one of the plurality of battery cells;
voltage detection units each provided in one of the satellite units and each configured to detect a voltage value of the one series connection of two or more battery cells or the battery cell associated with the one of the satellite units;
slave units each provided in one of the satellite units and each configured to wirelessly transmit information detected by the voltage detection unit provided in the one of the satellite units;
a master unit configured to wirelessly receive the information transmitted from the slave units; and
a central monitoring unit configured to receive the information received by the master unit, wherein
the central monitoring unit is configured to output, via the master unit, a voltage acquisition request, which is an instruction to acquire the voltage values, and to determine whether the voltage acquisition request has been received by each of the slave units,
each of the slave units is configured to, in response to determining that the voltage acquisition request has been received from the master unit, acquire the information including the current value and the voltage value synchronous with each other, and
each of the satellite units is configured to calculate, from the information, an internal resistance of each battery cell and to calculate, based on the calculated internal resistance, the state of the battery cell.