You can go to local auto repair service stations, home appliance repair shops and auto repair shops to find professional car owners or maintenance masters to study, or you can go to local vocational schools or technical colleges to study auto repair majors. You can also search online to learn the battery repair technology tutorial.
Brief introduction of battery:
A battery refers to a battery that can continue to be used after being discharged and charged. There are lead batteries, nickel-iron batteries and nickel-cadmium batteries. The anode of lead storage battery is lead dioxide, the cathode is lead and the electrolyte is dilute sulfuric acid solution.
When discharging (using), the positive and negative electrodes react with sulfuric acid to generate lead sulfate. When the concentration of sulfuric acid solution drops to a certain extent, it must be charged. When the external power supply is used for charging, the electrode and solution can be restored to the original state and can be used again after charging.
The working principle of the battery:
A lead plate filled with sponge lead is used as a negative electrode, a lead plate filled with lead dioxide is used as a positive electrode, and 22-28% dilute sulfuric acid is used as an electrolyte. Electrical energy is converted into chemical energy when charging, and chemical energy is converted into electrical energy when discharging.
When the battery is discharged, metal lead is the negative electrode, which is oxidized into lead sulfate. Lead dioxide is the positive electrode, which is reduced to lead sulfate by reduction reaction. When the battery is charged with direct current, lead and lead dioxide are generated at two poles respectively. After the power supply is removed, it returns to the state before discharge, forming a chemical battery.
Lead battery is a kind of battery that can be repeatedly charged and discharged, and it is called secondary battery. Its voltage is 2V, usually three lead-acid batteries are connected in series, and the voltage is 6V. Six lead-acid batteries for automobiles are connected in series to form a 12V battery pack. Ordinary lead-acid batteries should be supplemented with distilled water after a period of use to keep the electrolyte containing 22 ~ 28% dilute sulfuric acid.