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Factors affecting the actual service life of Panasonic batteries
Factors affecting the actual service life of Panasonic batteries
Overcharge: At the beginning of charging, the Panasonic battery has a low battery terminal voltage. At this time, no hydrogen-oxygen gas is released, and then the Panasonic battery terminal voltage gradually rises. When the battery terminal voltage rises to a certain value, the battery will precipitate a large amount of gas. When the battery terminal voltage rises to 2.30 - 2.35 V / only (this voltage is called the gas generation point voltage), the gas in the battery increases remarkably. As the charging progresses, more and more PbO2 on the surface of the electrode, and PbSO4 has gradually decreased, and the rate of oxygen evolution of the positive electrode will become larger and larger, and at the same time, the negative electrode of the battery also begins to evolve hydrogen. Therefore, overcharging will cause the battery to generate a large amount of gas, which will cause the battery to lose water and lead to premature effectiveness, and the capacity will decrease early.
Over-discharge: A discharge that is performed to periodically detect the chargeability of the battery during operation is called a check discharge. The VRLA battery has a constant current discharge of 1.80V at a constant current of 0.1C. The continuous discharge at the end of discharge is called overdischarge. Once it enters the overdischarge state, the battery terminal voltage will accelerate and fall, which will easily cause power interruption and also cause active material transition. The consumption causes the pores of the active material and the reaction area reserved for the next charging to decrease, which causes difficulty in subsequent charging and maintenance of the battery, and finally the Panasonic battery cannot be filled, and the capacity is greatly reduced.
Temperature: Operating conditions also have a significant impact on the life of Panasonic batteries. If used at high temperatures for a long time, the battery life is reduced by half for every 10 degrees increase in temperature.
Sulfation of negative plate: VRLA battery that can perform normal work. The discharge of lead acid in the negative plate is smaller particles. It is easy to recover to fluffy lead when charging, but some battery discharge products are insoluble large particles of lead sulfate, and are charging. It cannot be reduced to fluffy lead, and this negative plate is called sulfation. The reasons for the sulphation of the negative plate are: insufficient long-term charging of the battery, long-term discharge at high temperature, long-term discharge, high-level electrolyte concentration and battery water loss. Sulfation of the negative plate will directly cause the capacity of the battery to shrink. An effective way to prevent sulphation of the negative plate is to always keep the battery content full.
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