NEGATIVE ELECTRODE ABSORPTION TYPE SEALED LEAD-ACID BATTERY

• Main Author: YONEZU KUNIO
• Format: Patent
• Language: English
• Published: 23.01.1998
• Edition: 6
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To keep the amount of an electrolytic solution with which an electrode unit is impregnated approximately constant, prevent deterioration of a negative electrode absorption type sealed lead-acid battery due to decrease of the electrolytic solution, and prolong the life of the battery by installing a water-retaining container in the lead-acid battery. SOLUTION: A water-retaining container is constituted of an battery jar 6b, a lid 7b, and a diaphragm 10. In the case a sealed reaction is incomplete or the amount of an electrolytic solution is decreased due to permeation of steam through the wall faces of the battery jar 6b and the lid 7, the upper face of the flowing electrolytic solution existing in a lower part of the inside of the battery jar 6b is lowered. When the upper face position becomes lower than a small hole 11 of the water-retaining container, a gas in the battery jar 6b enters the inside of the water-retaining container through the small hole 11 and the gas space 13 in an upper part is widened and the water in the water-retaining container is supplied to the battery jar. Since the upper face of the flowing electrolytic solution rises and the small hole 11 is closed, the water in the water-retaining container is not supplied to the electrolytic bath beyond the level of the small hole. In this way, only the lower part of the electrode unit is immersed in the flowing electrolytic solution and even if the water of the electrolytic solution decreases, water is supplemented from the water-retaining container and constantly immersed state of the electrode unit can be retained.