BATTERY CONTROLLER AND POWER STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a power storage device including a battery controller which protects a battery control IC against breakdown by preventing application of high voltage of a battery pack to an integrated circuit of the battery controller when the battery pack and the battery controller are connected.

SOLUTION: The battery controller which controls a battery module where multiple cell groups (20A1-20B1) each consisting of series connection of multiple battery cells (BC1-16) are connected in series or in series-parallel comprises multiple cell controller ICs (IC1-4) which control multiple cell groups, respectively, and one or more connectors provided in order to connect the multiple cell controller ICs to the battery module. The multiple cell controller ICs include first and second cell controller ICs provided continuously to control two or more cell groups connected in series, and an auxiliary connection member (pin) for connecting the GND terminal side wiring of the first cell controller IC and the VCC terminal side wiring of the second cell controller IC on the outside of the battery controller is provided.

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