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Analysis of the power tool lithium battery charge is not what is the factor? How to diagnose?

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Analysis of the power tool lithium battery charge is not what is the factor? How to diagnose?

Release date:2018-01-06 Author: Click:

Lithium-ion batteries for power tools are not charged. It means that under normal operating conditions, the lithium battery is charged for a long time and the voltage rises slowly. The factors are as follows:


1. Loose or rusted wiring terminals in the charging circuit increase the resistance and decrease the current intensity.


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2. The lithium battery plate is vulcanized to form a layer of white aluminum sulfate crystal with poor conductivity. After the coarse grains block the pores of the plate, the electrolyte is difficult to enter, so that the internal resistance increases and the current cannot pass.


3. Because a large current is used to charge or discharge the battery, the specific gravity of the electrolyte is too large or the height of the liquid surface is not sufficient, and the battery plate is damaged. When diagnosed, first check whether the terminals are loose or rusted, and then determine whether the plates are vulcanized or not according to the scene when charging. If the temperature of the electrolyte rises rapidly during charging, or if the charging time is not long, the electrolyte will generate a lot of bubbles, but the voltage does not increase, and the specific gravity of the electrolyte is not added, then the plate is vulcanized. When the vulcanization is not severe, all the electrolyte can be poured out, written into distilled water, and then charged for a long time with a small current of 2 amps to dissolve the aluminum sulfate, but care should be taken not to allow the temperature of the battery to be added. When the specific gravity of the electrolyte is not added within a few hours, the battery is sufficiently charged and discharged.


Through repeated charge and discharge cycles, after the active material is recovered, if it is still not normal, new products should be replaced.

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