| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid type lead acid battery in which turbidity of the electrolyte is less, and low temperature high rate discharge performance, regenerative charge acceptance performance, and durability performance under insufficient charging state are excellent.SOLUTION: The negative electrode active material of a liquid type lead acid battery contains a water-soluble polymer principally comprising a bisphenol-based condensation product having 0.5-2.5 mass% of carbon black per 100 mass% of spongy lead in transformed state, and a sulfonic acid group as a substituent group, and polycarboxylic acid compound such as poly acrylic acid. The electrolyte has a carbon black concentration of 3 mass ppm or less in transformed state. |
