PURPOSE: To improve charge/discharge performance after overcharge and recovery capacity while to prevent overflow when forming the battery jar, by arranging acid-resistant porous material having liquid holding performance on the plate group.
CONSTITUTION: Acid-resistant porous material 5 having liquid holding performance is arranged on a plate group 4 constructed with a positive pole plate 1, negative pole plate 2 and a separator 3 mainly composed of glass fiber. Said plate group 4 is inserted into a battery jar 8 then electrolyte or diluted sulfuric acid is injected throgh a liquid injection/discharge port 9 in the jar cover then an explosion-proof valve 10 made of rubber is fixed at the discharge port 9 to produce a small size enclosed lead battery. Consequently charge/discharge performance after over-discharge and recovery capacity are improved to prevent overflow when forming the battery jar.
KOBAYASHI YOSHIHIRO
KOBAYASHI KENJI
YASUDA HIROSHI
