Why the battery capacity of electric storage pallet trucks will drop

With the continuous advancement of science and technology, electric storage pallet trucks in the industrial market have quickly occupied a certain market due to their convenient operation, simple maintenance, low noise and no pollution. Electric pallet jacks are ideal for indoor work. Most of our more common electric pallet trucks are powered by batteries, and the price is relatively low. The electric pallet truck can be charged for 8 hours at a time, but as time goes by, it can be fully charged in only about 4 hours, and then the power will drop rapidly. What is going on?

There is a situation that after the battery of the electric storage pallet truck arrives, the user does not install it in time, and the long-term storage causes self-discharge, resulting in insufficient battery capacity. Therefore, for the maintenance of the battery, we would like to remind everyone to charge it every once in a while.

The other is that the plate of the battery is corroded and deformed, causing insufficient battery capacity. The positive plate of the battery affects the service life of the battery to a large extent, and the capacity of the pallet truck battery charge-discharge cycle will lead to a decrease in the capacity under deep cycle, which is closely related to the quality deviation of the positive plate.

The main reason for the softening and shedding of the active material on the positive grid of the battery of the electric storage pallet truck is the high current charging and discharging of the battery of the pallet truck. Microscopically, there are macropores and micropores in the active material. The macropores are composed of many small pores with a size of more than 0.5 cm. As the discharge cycle progresses, the surface of the active material shrinks to form a core coral-like structure; while multiple discharge cycles The increased aggregation of small pores will make the large pores continue to increase, destroy the structure of the positive electrode, and cause the active material to fall off. The corrosion deformation rate of the positive grid depends on the composition of the grid alloy. The higher the storage temperature, the faster the corrosion rate, and the deeper the discharge depth, the more serious the corrosion.

The sulfation of the negative plate of the battery of the electric pallet truck will also cause the battery capacity of the electric storage pallet truck to decrease. In normal operation, the PbSO4 particles on the negative plate are small, and the discharge is easy to restore to velvety lead, but sometimes lead sulfate that is difficult to reduce is generated inside the battery, which is called sulfation.

There are many reasons for the salinization of the negative electrode, such as not being able to charge in time after discharge, long-term shelving of the battery, causing serious self-discharge, high electrolyte concentration, long-term insufficient charging, high temperature Under long-term discharge, this lead sulfate is difficult to restore by conventional methods, so the reduction of active substances will inevitably affect the capacity of the battery of the electric storage pallet truck.

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