BM2 Cells at Rest

At the end of the cold-temperature BM2 battery testing mentioned in the previous blog post, the BM2 was allowed to rest. This simply means that the overall power system was not drawing any power from the BM2, and the BM2 was fully charged to its terminal voltage (16.2V in this particular test). The resulting cell voltages illustrate the efficacy of the cell balancing algorithm -- there's a maximum spread across the four cells of 5-10mV.