| 摘要 |
PURPOSE:To improve battery characteristics in a battery having a a winding electrode body in a battery can by coating the outer peripheral surface of the winding electrode body with a contractile tube. CONSTITUTION:In a battery having a winding electrode body 15 in a battery can 5, the outer peripheral surface of the electrode body 15 is coated with a contractile tube 20 such as a thermally contractile polymer tube. Thereby, the electrode body 15 can be contracted uniformly in the diameter direction by means of the tube 20, and a constant pressure can be applied continuously to a negative electrode 1 and a positive electrode 2, and looseness of the electrodes can be prevented, and battery characteristics such as battery capacity and cycle life can be improved. |
