| 摘要 |
PROBLEM TO BE SOLVED: To provide a control valve type lead acid storage battery in which deterioration in oxygen gas absorption capability in the negative electrode plate and increase in battery internal pressure occurring when trickle charge is carried out are suppressed. SOLUTION: In the control valve type lead acid storage battery, at least one of edge plate of an electrode plate group 5 made of a positive electrode plate 2 and a negative electrode plate 3 through a separator 4 is the negative electrode plate, and the electrode plate group is housed in a cell chamber 7 of a battery case 6, and a plurality of pieces of linear ribs 9 are installed in parallel on a wall face 8 of the cell chamber facing the negative electrode plate being the edge plate. When the distance between the adjoining linear ribs is made D and the thickness of the negative electrode plate is made to be T, the ratio (D/T) is 2.0-8.0 and the height of the linear ribs is 0.8 mm or more. COPYRIGHT: (C)2006,JPO&NCIPI
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