| 摘要 |
PURPOSE:To improve the overcharge resistant performance of a sealed lead storage battery, in which unformed positive and negative plates are subjected to formation in a container, by carrying out the formation in two stages. CONSTITUTION:The first formation in which a positive plate influencing the overcharge performance is principally formed and the second formation in which the amount and the concentration of electrolyte is adjusted to given levels during and at the end are separately carried out. In the first formation, it is preferred that a small amount of dilute sulfuric acid with a low concentration is used as electrolyte to be poured. It has been found that a good result is obtained by adjusting the formation efficiency (content of lead oxide in an active material) to over 50%. In the second formation, oxygen gas is not absorbed by the negative electrode in the early stage, and formation of the positive and the negative plates is completed by adding electrolyte consisting of dilute sulfuric acid with a higher concentration than that poured in the first formation so that given amount and concentration of electrolyte is achieved at the end of the formation. As a result, the overcharge resistant performance is improved, a high formation efficiency of the positive plate is achieved, and a high capacity is obtained in the early stage. |
