4LR44 battery

Share the steps to eliminate the plate sulfation of battery 4LR44 battery

Battery 4LR44 battery belong to the category of lead-acid batteries. As the use time increases, the hardness of lead will become higher and higher, and sulfation will become serious. This is a major drawback of lead-acid batteries. If the lead purity of the forklift battery is not enough, or recycled lead is used for production, the sulfation time will be accelerated, resulting in a rapid decrease in capacity in the later use. So is there any way to solve this problem? With the acceleration of domestic industrial development, the application of industrial equipment and vehicles will increase. Every year, my country consumes a large number of lead-acid batteries. Strictly speaking, if the battery life is not properly handled or extended, secondary pollution will occur. Brans Battery has been involved in the research and development of 4LR44 battery since 2006. Batteries with plate sulfation must be eliminated, otherwise it will affect the normal operation of the battery. Different methods can be used to eliminate it according to the degree of sulfation.

For industrial batteries circulating on the market, here are some simple steps to eliminate sulfation:

1. Small current charging method. For batteries with less severe plate sulfidation, the method of charging with a small current can be used to eliminate it. The method is to use the second stage charging current of the initial charge (about 1/30 of the rated capacity), or a smaller current, to charge for a long time (40-50h) until it is sufficient, and then discharge it at a 20h discharge rate, and charge it again with a small current, and repeat this process until the battery capacity meets the requirements (i.e., reaches 80% of the rated capacity). The electrolyte density and height should be adjusted before use.

2. Water treatment method. When the plate sulfidation is more serious, the "water treatment method" can be used for repair. The method is to first discharge the battery at a 20h discharge rate to a single cell voltage of 1.75V, then pour out the electrolyte, add distilled water and let it stand for 1h, and then charge it with the second stage charging current of the initial charge. When the electrolyte density rises to 1.15g/mL, discharge it to the termination voltage according to the above discharge current. Then charge it with the original charging current until the electrolyte density no longer rises. Repeat this process until the battery capacity reaches 80% of the rated capacity, indicating that the treatment work is basically completed. Adjust the electrolyte density (1.28g/mL) and the liquid level before use.

3. Chemical treatment method. For batteries with severely sulfided plates, the addition of chemical agents can be used to remove the sulfide. The method is: first discharge the battery at a 20h discharge rate, pour out the electrolyte, rinse it with distilled water, and then prepare an electrolyte with a density of 1.100-1.150, and add 0.1%-0.5% chemically pure potassium carbonate or sodium carbonate to the electrolyte by weight, so as not to significantly change the electrolyte density. Inject the mixed electrolyte into the battery so that the liquid level reaches the specified height, and charge it with a current of 1/20 of the rated capacity of the battery. When the voltage of a single cell reaches 2.4V, reduce the current by half and continue charging until it is sufficient, then discharge and charge again, and repeat this process until the capacity is restored to 80% of the rated capacity. After charging, it is not necessary to pour out the electrolyte in the battery. Adjust the electrolyte density and height according to the regulations and you can use it.

4. Prevent battery plate sulfidation and store the battery correctly. When storing batteries that are not in use, the battery should be fully charged, the density should reach 1.285, the liquid level should be filled to normal, and the vent holes of each cell should be sealed and placed in a dark place indoors.

The storage time should not exceed 6 months. During this period, the electrolyte density and battery capacity should be checked regularly. If it is less than 25%, it should be recharged in time. For batteries stored for a long time, dry storage method should be adopted. Use distilled water to rinse several times and completely discharge at a discharge rate of 20h. Pour out the electrolyte, rinse with distilled water several times until there is no acid in the water, pour out all the water drops, dry it, tighten the filling plug and seal it for storage. Strictly charge the new battery or repaired battery according to the requirements before putting it into use. Try to use the battery in a fully charged state. The discharge in winter should not exceed 25%, and the discharge in summer should not exceed 50%. When the battery is used on the vehicle, it is often undercharged (especially for short-distance transport vehicles and field driving training vehicles). The battery should be supplemented and charged as needed (generally at least once a month), and distilled water should be added in time (cannot be replaced by river water and well water, etc.) to prevent the electrolyte level from being too low. However, the implementation steps of the above aspects must be carried out by professional battery forklift battery manufacturers or dealers, otherwise there is a certain risk.

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