| 摘要 |
PURPOSE:To provide a sealed secondary battery capable of improving charge/ discharge cycle life. CONSTITUTION:A unit electrode group consisting of a positive electrode plate 1, a negative electrode plate 2, and a hydrophilic layer interposed between the positive electrode plate 1 and the negative electrode plate 2 and having at least a membrane separator 4 is plurally laminated through a water repellent layer 5. The oxygen generated form the positive electrode plate can be uniformly absorbed on the whole surface of the negative electrode plate by the water repellent layer between the unit electrode groups. |
