Determination of battery module and sub-pack association in electrical energy storage systems

A method of determining, via a battery controller network, association between a battery module and a battery sub-pack in a multi-cell rechargeable energy storage system (RESS) having a plurality of battery cell groups arranged in individual battery modules and a plurality of modules arranged in individual battery sub-packs, the method comprising:

• identifying, via an algorithm programmed into an electronic controller, when electrical power is disconnected from the RESS;
• directing, via the algorithm, an electrical current through a selected sub-pack of the RESS sub-packs after electrical power is reconnected to the RESS;
• interrogating, via the algorithm, voltage sensors corresponding to a particular CMU to thereby detect a change in voltage triggered by the directed electrical current, wherein the plurality of voltage sensors is mounted to or positioned on each of a plurality of cell monitoring units (CMUs) in the battery controller network, each voltage sensor being configured to detect voltage across one respective cell group, wherein each respective CMU is electrically connected to a respective one of the battery modules and configured to process cell data for the respective battery cell groups, and wherein the electronic controller is in wireless communication with each of the CMUs and each of the plurality of voltage sensors;
• and
• recording, via the algorithm, a cross-reference between the particular CMU and the associated selected sub-pack when the change in voltage is detected.