Technical requirements for battery charging

The technical indicators for the guaranteed service life of the lead-acid batteries supplied by the manufacturer are given at an ambient temperature of 25°C. 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, the float voltage at 25°C is 13.5V; 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 feature. 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. About 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, lead-acid batteries in daily use cannot be kept in an environment of 25°C for a long time. There are still early, mid, and late temperature differences in a day, not to mention that there are four o'clock in spring, summer, autumn and winter in a year. Therefore, various lead-acid battery chargers of thyristor rectification, transformer step-down rectification, and general switching-regulated power supply are commonly used in the market to charge the battery in a constant voltage or constant current mode. It is unable to meet the strict technical requirements 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 range, large size, low efficiency, and poor safety factor. Natural Balance Charger In response to the above common problems in the charging of lead-acid batteries, Changsha Yuheng Electronics Co., Ltd. has conducted in-depth research on lead-acid battery chargers for a long time, and processed new chargers with its own magical methods and clever designs. The series of products have dealt with the complicated technical problems of lead-acid battery charging, and it has been proved through years of tests to greatly improve the service life of lead-acid batteries. 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 by them, the following relationship exists. If EA If EB is higher than EB, EA will supply EB with a voltage of EA-EBu003dΔE, and at the same time, according to the magnitude of ΔE, supply an Δi current to circulate and infuse the power source EB. When EB absorbs the Δi current supplied by EA, EB will rise to exactly equal to At 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, EAu003dEB, ΔEu003d0, Δiu003d0. 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 tracks the balance compensation for the supply of the charged battery with the change of the ambient temperature. Since the entire process of battery charging is completely automatic, we call it the natural balance method. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What factors affect the cycle life of UPS lithium battery packs?