| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lead battery capable of improving charge receiving characteristics in a high SOC rejoin while preventing disconnection due to corrosion at joint portion between a negative electrode strap part and a negative electrode plate lug.SOLUTION: The lead battery includes: a group of electrode which has plural positive electrode plates using a positive electrode grid of a lead-calcium alloy and plural negative electrode plates using a negative electrode grid of a lead-calcium alloy, which are alternately disposed being interposed by a separator, and in which electrode plate lugs of identical polarity are collected using a positive electrode strap and a negative electrode strap; an electrolyte for immersing the group of electrode; a battery case for storing the group of electrode and the electrolyte; a lid having a liquid port, which is connected to the opening of battery case; and a liquid port plug which has a path for exhausting a gas and an exhaust port, and which is attached to the liquid port. The negative electrode strap contains thallium without containing antimony. The path of the liquid port plug is mounted with a porous filter of a ceramics or resin.</p> |
