A secondary battery includes an electrode wound body including a positive electrode and a negative electrode, and includes an electrolytic solution. The positive electrode includes a positive electrode covered part and a positive electrode exposed part. The negative electrode includes a negative electrode covered part and a negative electrode exposed part. First edge parts of the positive electrode exposed part that is wound, second edge parts of the negative electrode exposed part that is wound, or both are bent toward a central axis to overlap each other, the first edge parts being adjacent to each other in a radial direction of the electrode wound body, the second edge parts being adjacent to each other in the radial direction. The electrolytic solution includes LiPF6 as an electrolyte salt. A concentration of the electrolyte salt in the electrolytic solution is within a range from 1.25 mol/kg to 1.45 mol/kg both inclusive.
SECONDARY BATTERY, BATTERY PACK, ELECTRONIC EQUIPMENT, ELECTRIC TOOL, ELECTRIC AIRCRAFT, AND ELECTRIC VEHICLE
2024-08-15
Patent
Electronic Resource
English
European Patent Office | 2024
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