| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealed battery in which battery swelling with internal short-circuiting or charging/discharging is suppressed. ! SOLUTION: The sealed battery comprises a flat electrode body around which a positive electrode plate including a cathode active material layer on a cathode core body and a negative electrode plate including an anode active material layer on an anode core body are wound via a separator. The positive electrode plate includes a cathode core body exposed part in a winding start end portion, and a cathode tab is connected to the cathode core body exposed part. The negative electrode plate includes an anode core body exposed part in a winding start end portion, and an anode tab is connected to the anode core body exposed part. At least one of the cathode core body exposed part and the anode core body exposed part includes a core body folding portion. ! COPYRIGHT: (C)2015,JPO&INPIT |
