Although the lead-acid battery has great improvements in structural design and use of raw materials, the performance has a considerable improvement, many design and material-free maintenance-free lead-acid battery floating charges are 15 ~ More than 20 years, but the battery that really can reach such a life is probably less. Take the car and motorcycle is widely used by the use of lead-acid batteries. The design life is 4 to 5 years. Through the investigation, it is found that there are few levels, most of the months to one I died in the year, and the reason, we think have the following points:1) The design of the charging equipment is not perfect, and it is not convenient to use.
2) Lead-acid battery is discharged until the timely supplementary charge, especially over-discharge, causes fatal injuries to the battery.
3) The product quality of a few manufacturers is poor, and it is made up.
The above reasons, we believe 2), 3) It is relatively easy to prevent and do well, and only 1) Talk about the problems in this regard.
Charging technical requirements for battery
The lead-acid battery provided by the manufacturer guarantees the technical indicator of the service life to be given at ambient temperature of 25 ¡ã C. Since the monomer lead-acid battery voltage has a temperature dropped by about 4 mV per increase in 1 ¡ã C, a 12V battery consisting of six monomer batteries, the floating charge voltage at 25 ¡ã C is 13.5V; when the ambient temperature is reduced to 0 At ¡ã C, the floating charge should be 14.1V; when the ambient temperature rises to 40 ¡ã C, the floating charge should be 13.14V. At the same time, the lead-acid battery has a characteristic that when the ambient temperature is constant, the charge voltage is 100mV high, and the charging current will increase several times, and therefore, the thermal out of control of the battery will result in the thermal out of control of the battery and overcharge. When the charging voltage is 100mV as the voltage is required, the battery will be insufficient, and the battery is damaged. In addition, the capacity of the lead-acid battery is also related to the temperature, about 1 ¡ã C, which will drop by 1 ¡ã C, and the manufacturer requires the manufacturer to discharge ranging from 50% of the rated capacity in the summer battery, after the winter releases 25%. It should be charged in time.
Obviously, the lead-acid battery in daily use is not possible in a 12 ¡ã C environment for a long time, and there is a temperature difference in temperature difference in the day, and not to mention in spring, summer, autumn, and winter. Temperature difference, therefore there are currently various thyristor rectification, transformer buck rectification, and general switching regulated power supply type lead-acid battery charger, which is a constant voltage or constant current type lead-acid battery charger. The stringent technical requirements that need to be met to meet the need for lead-acid battery supplement charge. Throughout these methods of charging of lead-acid batteries, as well as lead-acid battery chargers developed according to these methods, we are not difficult to see that the technology is not perfect, and the lead-acid battery is charged with these products. The life of the lead-acid battery is affected, and these chargers have problems with narrow operating voltage, large, low efficiency, and poor safety factor.
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