The most worrying to lead-acid batteries is charging them immediately after they have been discharged deeply. In this case, the battery life will be greatly reduced. Do not discharge deeply for many times. The so-called deep discharge refers to the under-voltage of electric vehicles. After the power is cut off, it is absolutely impossible to continue to power on and drive. The intermittent discharge of the battery of the electric vehicle will hurt the battery the most. The lead-acid battery charging method is as follows:

1. Charge when the battery indicator shows one third of the remaining battery.

2. The charging environment should be kept dry and tidy, and the charger should not be wrapped in plastic bags or plastic bottles, because it is very easy to burn when the charger cannot breathe.

3. Try not to use fast charging, if not necessary, do not use it more than twice within a month.

4. The charger is placed in a fixed place, do not bump it, even if it is carried, it must fully consider the bumps that cause failures.

5. Use the standard charger to charge.

Definition: The electrodes are mainly made of lead and its oxides, and the electrolyte is a battery of sulfuric acid solution. In the discharge state, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead; in the charged state, the main component of the positive and negative electrodes is lead sulfate. Divided into vented batteries and maintenance-free lead-acid batteries. The battery is mainly composed of a tubular positive plate, a negative plate, an electrolyte, a separator, a battery tank, a battery cover, a pole, and a liquid injection cover. The electrodes of the vented battery are composed of lead and lead oxides, and the electrolyte is an aqueous solution of sulfuric acid. The main advantage is voltage stability. With the development of technology, lead-acid batteries have a longer life and easier maintenance. When the discharge is carried out, the concentration of the sulfuric acid solution will continue to decrease. When the density of the solution drops to 1.18g/ml, it should be stopped for charging.

Charging: 2PbSO₄+2H₂O= PbO₂+Pb+2H₂SO₄(electrolytic cell)

Discharge: PbO₂+Pb+2H₂SO₄= 2PbSO₄+2H₂O (primary battery)

Anode: PbSO₄+2H₂O - 2e-=  PbO₂+4H + +SO₄²-

Cathode: PbSO₄+2e-= Pb+S0₄²-

Negative: Pb+SO₄²-- 2e= PbSO₄

Positive: PbO₂+4H+ +SO₄²-+2e-= PbSO₄+2H₂O

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