Patent ID: 11876192
Assignee: DENSO CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 1:
2. An assembled battery monitoring apparatus, comprising:
a plurality of monitoring circuits connected to an assembled battery configured by connecting a plurality of battery cells in multiple stages in series, to monitor a state of the assembled battery; and
a control circuit connected with the plurality of monitoring circuits in a daisy chain connection, to transmit a command with a check code to the plurality of monitoring circuits on a downstream side in the daisy chain with each of cycles to provide an instruction,
wherein,
the plurality of monitoring circuits are configured to store value data as stored value data respectively in memories corresponding to the monitoring circuits,
wherein,
in response to a first monitoring circuit that is one of the plurality of monitoring circuits and that starts to receive the command, the first monitoring circuit is configured to transmit the command to the downstream side before making a determination based on the check code; and
in response to the first monitoring circuit indicating that the command has not been received over the cycle, the first monitoring circuit is configured to transmit, to the downstream side, a communication interruption command including an initial value as an included value data, the initial data being stored as the stored value data in the memory corresponding to the first monitoring circuit at a time of the first monitoring circuit indicating that the command has not been received,
wherein,
in response to a second monitoring circuit that is one of the plurality of monitoring circuits and that receives the communication interruption command, the second monitoring circuit is configured to
transmit, to the downstream side, the communication interruption command including, as the included value data, the stored value data that is being stored in the memory corresponding to the second monitoring circuit at a time of the second monitoring circuit receiving the communication interruption command, and
apply a calculation process on the included value data in the received communication interruption command to obtain an updated value to store the updated value as the stored value data in the memory corresponding to the second monitoring circuit, and
wherein,
in response to the control circuit receiving the communication interruption command, the control circuit is configured to identify a location where a communication interruption occurs based on the included value data in the received communication interruption command.