Thanks for the informative post. My apologies to you and to George for having lured you off topic and gotten us scolded by George!Battery Management and Cell Balancing
The pack is divided into 4 distinct management blocks each with there own group of 24 triplets to monitor. This is accomplished by four interconnected Battery Interface Control Modules (BICM). Each BICM monitors the 24 voltages and 4 temperature probes interspaced between every 6 cell groups.
I have a question which is on topic.
If you examine the battery pack cutaway drawing you attached it is clearly visible that the BICM at the front is cabled to two 12 triplet modules plus one 6 triplet module. The BICM in the middle is cabled to just two 12 triplet modules. If you examine the photos of the T bar portion of the pack at this link: http://gm.wieck.com/forms/gm/*query?ws4d_nav=true&search_criteria=VoltPortTech&source=all&page=4 you can see that the BICM at the driver side is cabled to one 12 triplet module plus one 6 triplet module. The BICM on the passenger side is cabled to two 12 triplet modules.
So, are you right in saying that each of the four BICMs controls 24 triplets or is the responsibility split 30 - 24 - 18 - 24 as the photos seem to show?