The first charge of the battery is called the initial charge, and the initial charge has a great influence on the service life and charge capacity of the battery. If the charge is insufficient, the charge capacity of the battery is not high, and the service life is short; if the charge is over, the electrical performance of the battery is good, but it will also shorten its service life, so the new battery should be charged carefully. For dry-charged lead-acid batteries, according to the instructions for use, even if they need to be used within the specified two-year storage period, just add the electrolyte of the specified density and leave it for 15 minutes, and they can be put into use without charging. However, if the storage period exceeds two years, due to partial oxidation on the plate, in order to increase its charge capacity, supplementary charging should be carried out before use, and then used after charging for 5h-8h.
No supplementary charging
Some drivers often neglect the supplementary charging of the battery in the car. Because the battery is not fully charged in the car, it is easy to cause the plate to vulcanize; at the same time, the charge and discharge of electricity in use are unbalanced. If the discharge is greater than the charge and the battery is in a long-term depletion state, the battery plate will slowly vulcanization. This kind of chronic vulcanization will reduce the charge capacity of the battery until it is weak to start, greatly shortening the service life of the battery. In order to restore the active material on the battery plate in time, reduce the vulcanization of the plate, increase the charge capacity of the battery, and prolong its service life, the battery in the vehicle should be recharged regularly.
Battery overcharge
The battery is often overcharged. Even if the charging current is not large, the electrolyte "boils" for a long time. In addition to the fine particles on the surface of the active material, it is easy to fall off, and the grid frame will be excessively oxidized, causing the active material and the grid frame to loosely peel off.
Reverse polarity when charging
Due to the different materials of the positive and negative plates of the battery, in addition to the active material, the negative plate is also added with materials such as barium sulfate, humic acid, carbon black and rosin to prevent shrinkage and oxidation of the negative plate. In addition, the number of negative plates of each single cell battery is always one more than the number of positive plates, and the negative plate is slightly thinner than the positive plate. When performing initial charging or supplementary charging of the battery, if you do not pay attention to the polarity, the battery will be reversed and the positive and negative electrodes will almost become coarse-grained PbSO4, resulting in insufficient charge capacity of the battery, failure to work normally, or even causing the battery scrapped. Therefore, you must pay attention to the polarity when charging, and do not reverse the polarity.