The valve-regulated sealed lead-acid battery (hereinafter referred to as the valve-controlled battery) is widely used in practical applications due to its characteristics of saving investment, easy installation, safety, reliability, and ease of use. However, due to lack of understanding of its use requirements, and the use of the old balanced charging system, the battery is greatly harmed.
1. Reasons to cancel equalization charging
(1) What is equalization charging?
The so-called balanced charging is the charging of the characteristics of the balanced battery. It means that during the use of the battery, the battery terminal voltage is unbalanced due to individual differences in the battery, temperature differences, etc., in order to avoid the deterioration of the imbalance trend, it is necessary to increase the battery. The charging voltage of the group is activated and charged.
(2) Reasons for no need for balanced charging
First of all, the concept of the concept of balanced charging is that most of the current valve-regulated batteries proposed in the use of old-fashioned lead-acid batteries have clearly proposed "voltage equalization, thorough formation." And "the acid layer is not formed in the battery, and there is no need to perform equalization charging." The definition of the charging voltage for a 2.4V single cell is accelerated charging, ie "FASTCHARGE" instead of "EQUATION".
Second, balanced charging can cause damage to the valve-regulated battery. The balanced charging voltage is a higher float voltage for most batteries. At this point, most of the normal batteries are in an overcharged state. The gas that cannot be combined forms a certain pressure inside the battery. When the pressure exceeds the threshold of the safety control valve, the valve opens and the gas is discharged from the control valve.
In the previous battery maintenance, the process of equalizing the charging was to adjust the specific gravity of the battery, that is to say, the amount of water was added by adding distilled water to maintain the balance of the battery. However, in the maintenance-free battery, there is no water under the existing maintenance system, which will inevitably cause the battery to lose water and the battery to dry up.
2. How to ensure the consistency of the battery terminal voltage after canceling the equalization charge
(1) Determinants of battery terminal voltage
First, it depends mainly on the concentration of the electrolyte and the material of the plate. When the battery loses water, the electrolyte concentration will increase, causing the terminal voltage of the battery to rise. Second, it is related to the opening of the safety valve. If the pressure of the safety valve is too low, the battery will lose water prematurely and the terminal voltage will rise. In addition, the connection state between the series batteries is different, and when the battery is floated, insufficient charging may occur. When the battery encounters deep discharge and then performs restorative charging, it is difficult to recover, which will cause the battery terminal voltage to be low.
(2) means of guaranteeing the voltage of the battery terminal
Since the battery will have an inconsistent terminal voltage and does not allow the battery to be evenly charged, how to ensure the consistency of the battery terminal voltage? First of all, the battery voltage should be consistent from the raw materials and production links of the battery. For example, the choice of battery materials, especially the selection of key materials such as electrolytes, plates, pressure control valves. Secondly, we must ensure the quality of the battery installation and ensure the consistency of the battery installation status. For example, the connection method of the battery, the balance of the torque, and the like. Also pay attention to maintenance. For some backward batteries, restorative charging should be carried out, and the electrolyte of the battery should be properly adjusted; the working state of the pressure valve should be checked regularly.
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