| 摘要 |
PURPOSE:To prevent short circuit between positive and negative plates by forming the end of a mat-type separator, to be in contact with the cut end of a negative plate using expanded grid, in low moisture content structure, and suppressing the expansion of active material in the cut part. CONSTITUTION:A sealed lead-acid battery is formed with a negative plate using expanded grid and a mat-type separator. The end 1 of a separator 2 to be in contact with the cut end of the negative plate is formed in low moisture content structure by using thick glass fibers having a diameter of 10mu or more. This low moisture content part is limited to 1/4-1/2 of lateral dimension of a grid mesh from the end 1. Thereby, since the supply of electrolyte necessary for charge-discharge reaction to the active material of the negative plate is limited to reduce its reaction rate, the expansion of the active material is suppressed and the short circuit between positive and negative plates is prevented. |
