Types of batteries and their correct use and maintenance

At present, the commonly used automotive batteries are mainly divided into three categories, namely ordinary batteries, dry-charged batteries and maintenance-free batteries.
Ordinary batteries: The plates of ordinary batteries are composed of lead and lead oxides, and the electrolyte is an aqueous solution of sulfuric acid.
Its main advantages are stable voltage and low price; its disadvantages are low specific energy (that is, the amount of electrical energy stored per kilogram of battery), short service life and frequent daily maintenance.
Dry-charged battery: Its full name is dry-charged lead-acid battery. Its main feature is that the negative plate has a high storage capacity. In a completely dry state, it can store the obtained electricity within two years. When using it, you only need to add electrolyte and wait for 20-30 minutes before using it. Maintenance-
free battery: Due to its own structural advantages, the consumption of electrolyte in maintenance-free batteries is very small, and distilled water basically does not need to be added during its service life. It is also shock-resistant, high-temperature resistant, small in size and low in self-discharge. The service life is generally twice that of ordinary batteries. There are also two types of maintenance-free batteries on the market: the first type is added with electrolyte once when purchased, and no maintenance (addition of supplementary fluid) is required during use; the other type is that the battery itself has been filled with electrolyte and sealed when it leaves the factory, and the user cannot add supplementary fluid at all.
The correct use and maintenance of batteries mainly include the following 7 points:
1. Check whether the fixing bolts of the battery on the bracket are tightened. If the installation is not secure, the shell will be damaged due to driving vibration. In addition, do not place metal objects on the battery to prevent short circuit.
2. Always check whether the pole and the terminal are connected reliably. To prevent oxidation of the terminal, you can apply protective agents such as vaseline. 3. Do not use the direct ignition (short circuit test) method to check the battery power, which will cause damage to the battery.
4. Ordinary lead-acid batteries should pay attention to adding distilled water regularly. It is best to charge dry-charged batteries properly before use. As for maintenance-free batteries that can be added with water, it is not that they cannot be maintained. Proper inspection and adding distilled water when necessary will help extend the service life.
5. The air holes on the battery cover should be unobstructed. When the battery is charging, a large number of bubbles will be generated. If the vent is blocked and the gas cannot escape, when the pressure increases to a certain extent, the battery shell will burst.
6. There is often a yellow-white paste around the battery pole and cover. This is because sulfuric acid corrodes the pole, wire clip, fixing frame, etc. The resistance of these substances is very large and should be removed in time.
7. When two batteries need to be used in series, the capacity of the batteries should be equal. Otherwise, it will affect the service life of the batteries.