Battery Pack Cell Zoning for Low-Temperature Energy Retention

The patent applies local quality by creating different thermal environments within the battery pack. Insulation structures are selectively positioned around certain battery cells (first and second battery cells) while leaving other cells (third and fourth battery cells) without such insulation. This results in warmer local regions for insulated cells and colder regions for non-insulated cells, allowing the pack to maintain higher overall energy retention at low temperatures while preserving increased discharge capacity through the combined cell configuration.

The patent segments the battery pack into distinct thermal zones by dividing it into multiple regions (first region, second region, third region, fourth region) with different insulation characteristics. Each region contains specific battery cells arranged in series or parallel configurations. This segmentation allows independent thermal management of different cell groups, improving low-temperature performance through localized heat retention while maintaining a relatively simple overall structure by using basic insulation components rather than complex active thermal management systems.