| 摘要 |
In the present invention, the depletion of an electrolyte in a group of wound electrodes, as a result of charging/discharging, is mitigated. Provided is a secondary battery having a group of wound electrodes in which electrodes and separators are wound about a core. The core has a rigid body portion made of a resin, and an elastic portion made of a resin having a lower elastic modulus than that of the rigid body portion, the elastic portion being disposed between the innermost circumferential separator and the rigid body portion. |
