| abstract |
Provided is a high-capacity battery pack that eliminates cell balance deviation, prevents precipitation of insoluble redox shuttle agents, suppresses overcharge degradation, improves battery yield, and stabilizes charge-discharge cycles. The battery pack of the present invention is characterized by comprising a non-aqueous secondary battery, the non-aqueous secondary battery comprising: a positive electrode, a negative electrode, and a non-aqueous electrolyte solution containing an electrolyte salt and a non-aqueous solvent, and the battery pack is composed of one or two A battery pack is formed by connecting two or more non-aqueous secondary batteries in parallel with two or more non-aqueous secondary batteries in parallel. The modules are constructed in series, and the ratio of the maximum capacity (B) to the minimum capacity (A) of each non-aqueous secondary battery constituting the module is 1.00<B/A<2.00, and the non-aqueous electrolyte solution contains A redox shuttle agent with a reversible redox potential at a potential higher than the positive electrode potential when fully charged. |