CHARGING METHOD OF LEAD STORAGE BATTERY

• Main Authors: YONEZU KUNIO, TAKAHASHI KATSUTO
• Format: Patent
• Language: English
• Published: 09.12.1983
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY

PURPOSE:To actialize the full display of power-saving and battery performance, by charging an active material with low terminal voltage for a long time after carrying out a short-time discharge for gas generation, in case the degree of fluctuations in electrode specific gravity is large when the quantity of more than half of the active material is charged so far. CONSTITUTION:The first half of discharge is carried out with constant current, and terminal voltage is used after the quantity of more than half of an active material gets charged and takes place with a low voltage of 2.3-2.5V/cell where almost no gas is produced. Next, if specific gravity at the upper part is lower than the specified value or the specific gravity at the lower part is higher, the concentration of an electrolyte is uniformized by mixing. Then, the short-time discharge for gas generation takes place by adding a large current or high voltage as much as the specified time or the quantity of electricity. This time or the quantity of electricity is generally is 1-10% in nominal capacity. When the quantity of electricity is little, the mixing of the electrolyte is insufficient but if it is too much, a positive electrode grid gets corroded due to overcharging, thereby accelerating its deterioration. Next, when charging takes place with such a small current as below 20h R or low voltage as 2.2-2.5V/cell for a long time of 1-10h, an uncharged part is gradually charged to completion and, what is better, small in a loss of power. With this, there is no deterioration in a positive plate and the active material is fully charged so that battery performance can be brought into full play.