| 摘要 |
PURPOSE:To prevent the nonuniform absorption of oxygen gas and a shape change by dividing the active material of a negative electrode plate on the same electrode plate with alkali-resistant resin, and completely separating the divided portions. CONSTITUTION:A current collector 1 made of copper punching metal and bulkheads 2 made of Teflon form a grid shape, the inner face is divided, and it contains an active material 3 mainly made of zinc and zinc oxide and a terminal 4. A sheet of a negative electrode is divided with bulkheads made of alkali-resistant resin, and liquid retaining layers kept in contact with the bulkheads are deposited or pressed to the bulkheads to completely separate the active material at various portions. A shape change due to the diffusion of zincate ions is prevented, and the absorption of oxygen gas only at the peripheral section of an electrode plate can be suppressed by the bulkheads provided at the peripheral section of the electrode plate, the oxygen gas is diffused to the center section of the electrode plate through the bulkheads, thus nonuniform absorption of the oxygen gas can be prevented. |
