| 摘要 |
PURPOSE:To detect electrically deterioration caused by elongation and corrosion of an anode grid by arranging measuring terminals in a part of an external skelton of an anode plate. CONSTITUTION:The first and the second measuring terminals 6 and 7 are arranged in a projection part 2a in the lower part of an anode plate 2 through lead wires 4 and 5. The terminals 6 and 7 are derived outside of a battery jar 1 under a liquid tight condition. For example, the terminal 6 is set for measuring electric current, and the terminal 7 is set for measuring voltage. When deterioration is caused by elongation and corrosion of an anode grid, the deterioration can be detected electrically by measuring resistance between the measuring terminals and an anode terminal 3, since the resistance is increased. Even if a resistance value of an anode plate 3 is small, the deterioration can be measured easily by using a four terminal method by means of the measuring terminals 6 and 7. |
