At present, our commonly used truck batteries are mainly divided into three categories, namely ordinary batteries, dry-charged batteries and maintenance-free batteries.

Ordinary battery: the polar plate of ordinary battery is composed of lead and lead oxide, and the electrolyte is aqueous solution of sulfuric acid. Its main advantages are stable voltage and low price; its disadvantages are low specific energy (ie the 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 electrode plate has a high power storage capacity. In a completely dry state, it can save the obtained power within two years. When used, Just add electrolyte and wait for 20-30 minutes before using.

Maintenance-free battery: Due to its structural advantages, the maintenance-free battery consumes very little electrolyte, and it does not need to add distilled water during its service life. It also has the characteristics of shock resistance, high temperature resistance, small size and small 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 one is to add electrolyte at the time of purchase and it does not require maintenance after use (adding supplementary liquid); the other is that the battery itself has been filled with electrolyte and sealed when it leaves the factory. , The user can't add supplement liquid at all.

The correct use and maintenance of the battery mainly have the following 7 points:

1. Check whether the fixing bolts of the battery on the bracket are tightened. If the installation is not reliable, the casing will be damaged due to driving vibration. In addition, do not put metal objects on the battery to prevent short circuit.

2. Always check whether the pole and terminal are connected reliably. In order to prevent terminal oxidation, you can apply protective agents such as petroleum jelly.

3. The method of direct ignition (short circuit test) cannot be used to check the battery power, which will cause damage to the battery.

4. Regular lead-acid batteries should be added regularly with distilled water. The dry-charged battery should be properly charged before use. As for the maintenance-free battery that can be added with water, it is not impossible to maintain it properly. Checking if necessary, supplementing distilled water helps extend the service life.

5. The air holes on the battery cover should be unobstructed. A large number of bubbles will be generated when the battery is charged. If the vent hole is blocked so that the gas cannot escape. When the pressure increases to a certain level, the battery case will burst.

6. There is often a yellow-white paste around the battery pole and cover, which is caused by sulfuric acid corroding the root post, line card, fixing frame, etc. The resistance of these substances is great and must be removed in time.

7. When two batteries are required to be used in series, the battery capacity is preferably equal. Otherwise it will affect the service life of the battery.

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