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Why does the battery fail to reach the design service life?

by:Power Kingdom     2021-07-06

   From the above analysis, it is not difficult to see that this method is particularly suitable for maintenance-free and low-maintenance lead-acid battery maintenance charging, and it is more suitable for the daily maintenance of batteries used for intermittent discharge. Charging is beneficial to improve the reliability of the battery in daily use and increase the service life of the battery.

   Although the structure design and the use of raw materials for the battery have been greatly improved compared with the past, the performance has been greatly improved, and many excellent design and material maintenance-free lead The theoretical lifespan of an acid battery in floating charge is 15-20 years or more, but there are probably very few batteries that can actually achieve such a life in use. For the widely used lead-acid batteries for low-maintenance starting with dry charge, the design service life is more than 4 to 5 years. According to investigations, it is found that rarely can reach the above level, and most of them are fed for several months to a year. The status is over. We think the reasons are as follows:

  1) The design of the charging equipment is not perfect and it is inconvenient to use.

  2) Valve-regulated lead-acid batteries cannot be recharged in time after discharge, especially over-discharge can cause fatal injuries to the battery.

  3) A small number of manufacturers’ products are inferior in quality and use inferior raw materials for low prices.

   Battery charging technical requirements?

  The technical indicators provided by the manufacturer to guarantee the service life of the battery are given at an ambient temperature of 25℃. Since the voltage of a single lead-acid battery has the characteristic of decreasing about 4mv every time the temperature rises by 1°C, a 12V battery composed of 6 single cells in series has a floating charge voltage of 13.5V at 25°C; when the ambient temperature drops to 0 At ℃, the floating voltage should be 14.1V; when the ambient temperature rises to 40℃, the floating voltage should be 13.14V. At the same time, the lead-acid battery has a characteristic. When the ambient temperature is constant, the charging voltage is 100mv higher than the required voltage, and the charging current will increase several times. Therefore, it will cause thermal runaway and overcharge damage of the battery. When the charging voltage is 100mv lower than the required voltage, the battery will be undercharged, and the battery will also be damaged. In addition, the capacity of lead-acid batteries is also related to temperature. Approximately, for every 1°C decrease in temperature, the capacity will drop by 1%. Therefore, manufacturers require lead-acid battery users to discharge 50% of the battery’s rated capacity in summer and 25% in winter. It should be charged in time.

   Obviously, the battery in daily use cannot be kept in an environment of 25℃ for a long time. There are early, mid, and late temperature changes throughout the day, not to mention that there are The four seasons of spring, summer, autumn, and winter have greater temperature differences. Therefore, various thyristor rectifiers, transformer step-down rectifiers, and general switch-regulated power supply type lead-acid battery chargers commonly used in the market are used in constant voltage Or charging the battery in a constant current mode cannot meet the strict technical requirements that need to be met for supplementary charging of lead-acid batteries. Looking at the methods used in the past to charge lead-acid batteries and the lead-acid battery chargers developed based on these methods, it is not difficult to see that the technology is not perfect enough. Using these products to charge lead-acid batteries is bound to be straightforward. Affect the service life of lead-acid batteries, and these chargers also have problems such as narrow working voltage adaption range, large volume, low efficiency, and poor safety factor.

  Natural balance charger

   In view of the common problems in the above battery charging, the lead-acid battery charger has been extended. In-depth study of time, with its own unique method and ingenious design, produced a new series of chargers, which solved the complicated technical problems of lead-acid battery charging. It has been proved through many years of experiments that it has greatly improved the service life of lead-acid batteries. . Briefly introduce the new method of battery charging-the natural balance charging method.

   What is the natural balance method for battery charging?

   There are two power sources EA and EB. When the power source EA and the power source EB are at the same ambient temperature, the positive pole is connected to the positive pole, and the negative pole is connected to the negative pole. In the closed circuit formed, there is the following relationship. If EA is higher than EB, EA will provide EB with a voltage of EA-EBu003dΔE, and at the same time, according to the size of ΔE, provide a Δi current to circulate and infuse the power source EB. EB absorbs the Δi current provided by EA, and when EB rises to be completely equal to EA (in the battery, the battery terminal voltage rises and the charge storage capacity increases), the power supply EA will stop supplying current to the power supply EB, that is, EAu003d EB, ΔEu003d0, Δiu003d0.

   In the above description, we replaced EB with a charged battery, and calculated the corresponding voltage of the battery at different depths of discharge and ambient temperature. The EA is carefully designed to meet the needs of battery charging balance under different ambient temperatures, and automatically adjust the output voltage and current of the power supply, and connect it accordingly. In a completely idealized situation, the power supply EA can charge the battery according to the current that the battery can accept at any ambient temperature. After the battery is fully charged, ΔEu003d0, Δiu003d0, the EA power supply will no longer consume power. EA only provides tracking balance compensation for the battery being charged with changes in the ambient temperature. Since the entire process of battery charging is completely automatic, we call it the natural balance method.

  
Shenzhen Power Kingdom Co., Ltd. 's products comply fully with all compatible producing regulations.
It is clear that is one of the best methods that can be used for the purposes of top lead acid battery manufacturers. If you want an and other top lead acid battery manufacturers, you should find the right provider who will guide you through and offer something that will help your business. For quality , go to Power Kingdom.
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