Lead-acid batteries are widely used in electric power, communications, data centers, finance, rail transit, high-speed and other industries. They are the equipment with the shortest life and the longest use time, and the equipment with the highest use cost. The lead-acid battery itself has the problem of unbalance. The lead-acid battery is composed of up to 36 cells. The more cells, the more unbalanced. If a single cell fails, it will lead to problems in the entire battery pack and shorten the battery pack. service life. How to deal with unbalanced battery voltage and how to balance the lead-acid battery pack?
How to balance the voltage of the lead-acid battery pack?
Due to the difference of the battery itself, there will be differences when used in series for a period of time, mainly in the different voltages of each battery, ranging from a few tens of millivolts to a few tenths of a volt. The battery must be balanced to play the role of the battery pack; For battery packs, however, the charger cannot achieve balanced charging of series-connected battery packs. The best way is to use a lead-acid battery equalizer.
Using a charger to charge a group of batteries connected in series cannot ensure that each battery in the battery pack is evenly charged, and other batteries are often overcharged or undercharged due to the voltage change (higher or lower) of some batteries in the battery. The battery pack is connected in series, and the battery with weak performance determines the performance of the entire battery pack. In order to solve this problem, the state stipulates that a regular (720H) strong charging method is adopted. Perform compensatory charging. Compensately charge the backward cells in the battery pack by increasing the charging voltage of the entire group.
Charging the battery pack by increasing the charging voltage of the whole pack can restore the capacity of the backward battery, but it will also charge the good battery bad, and the capacity will drop, the battery life will be shortened, the electrolyte will dry up, etc., which will affect the reliability of the entire system. However, the existing monitoring methods cannot monitor the operation status of the battery from the three indicators of voltage, internal resistance and capacity, accurately judge the quality of the battery, and pick out the backward battery, and the stability and reliability of the battery cannot be guaranteed.
Battery Balancer Product Introduction
A battery balancer, also called a battery balancer, is an electronic protection device that prevents the voltage imbalance between the cells inside the battery from reducing its service life.When the voltage between the battery cells is unbalanced, the charging and discharging speeds of different cells are different. When one cell is fully charged, the other cells are in a state of overcharging or undercharging. Overcharging or undercharging will damage the battery and cause a decrease in battery capacity. Lifespan is shortened. The battery balancer can ensure the balance of power between the cells in real-time, thereby extending the battery’s service life by 5-30%.
Lham battery equalizer is an active equalization system that has been researched and developed for many years. It solves the problem of charge and discharge balance of battery packs such as electric forklifts, electric vehicles, and electric tractors, and effectively prolongs the mileage of battery life and the service life of battery packs.
Therefore, balancing the battery to keep the battery in a normal operating environment is to improve each battery in the same working state and solve the problem of unbalanced battery cells during operation; At the same time, the battery with weak performance is activated online, which greatly prolongs the service life of the battery; it provides online battery internal resistance and capacity detection, accurately judges the quality of the battery, and improves the reliability of the battery pack. It fundamentally solves the problem of unbalanced battery pack, makes the operation of the battery pack stable and reliable, and fully guarantees the normal operation of the power supply system.