Patent ID: 9322883
Filing Date: 2016-04-26
CPC Classification: G01R

Claim Text:
1. A system for monitoring a battery stack having a plurality of cells, the system comprising: a plurality of time delay circuits connected in a daisy chain connection, each of the plurality of time delay circuits being electrically coupled to at least one of the plurality of cells, wherein a remaining plurality of time delay circuits are configured to sequentially receive trigger signals via the daisy chain connection after a first time delay circuit is triggered, wherein each of the plurality of time delay circuits are configured to execute a time delay in response to receiving the trigger signal, and output a time delay marking signal indicating that the time delay has elapsed, wherein the time delay is based on a voltage of the at least one of the plurality of cells to which the respective time delay circuit is electrically coupled, and wherein the daisy chain connection provides a temporally transparent transmission path for propagating the time delay marking signals to the end of the daisy chain connection for time interval decoding; and a control circuit configured to receive the time delay marking signal from each of the plurality of time delay circuits and, for each received time delay marking signal, to determine the voltage of the at least one of the plurality of cells associated with the respective time delay marking signal based on time intervals between the time delay marking signals.