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At present, the commonly used automotive batteries are mainly divided into three categories: ordinary batteries, dry load batteries, and maintenance free batteries. Ordinary batteries; The electrode plate of a regular battery is composed of lead and lead oxide, and the electrolyte is an aqueous solution of sulfuric acid. Its main advantages are stable voltage and low price; The disadvantages are low specific energy (i.e. the energy stored per kilogram of battery), short service life, and frequent daily maintenance. Dry charged lead-acid battery: Its full name is dry charged lead-acid battery. Its main feature is that the negative electrode plate has a high storage capacity. In a completely dry state, it can store the obtained electricity for two years. When in use, only electrolyte needs to be added, and it can be used after 20-30 minutes. Maintenance-free batteries: Due to their structural advantages, maintenance free batteries consume very little electrolyte and do not require distilled water supplementation during their 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 a regular battery. There are also two types of maintenance free batteries on the market: the first type is to add electrolyte at the time of purchase and do not require maintenance during use (adding supplementary liquid); Another type is that the battery itself is already filled with electrolyte and sealed when it leaves the factory, so users cannot add any replenishment solution at all.

On the outer shell of the battery, both ends are marked with+and - symbols, with the words "voltage 1.5V" in the middle indicating its electrodes and voltage. The outer shell of a dry battery is a cylinder made of zinc, which contains chemicals. In the center of the zinc cylinder stands a carbon rod, and a copper cap is fixed at the top of the carbon rod. Due to chemical changes inside the dry battery, many positive charges accumulate on the carbon rod and many negative charges accumulate on the surface of the zinc cylinder. The carbon rod and zinc cylinder are called the electrodes of a dry battery, the carbon rod that gathers positive charges is called the positive electrode, and the zinc cylinder that gathers negative charges is called the negative electrode. The symbols+and - on the shell of a dry battery represent the positive and negative poles of the battery, respectively. "Voltage 1.5V" means that the voltage between the two poles of the battery is 1.5V (unit of voltage). What is voltage? The situation of water flow can be used as a metaphor to illustrate. If the switch is turned on, a water flow from the water tower to the user will be formed in the water pipe. This is because the water surface of the water tower is higher than that of the user, which generates water pressure in the water pipes connecting the two. The function of a water pump is to continuously pump water from a low point to a high point in the water tower, so that the water level at the tower is always higher than that at the user's point, maintaining a certain water pressure between the two, and thus allowing water to flow continuously. When the small light bulb is connected between the two poles of the battery with a wire, it lights up, indicating that there is current in the circuit. The reason why free charges in a circuit can undergo directional movement to form current is because there is excess positive charge on the positive pole of the power supply, and excess negative charge on the negative pole of the power supply, which generates voltage on the circuit. The function of a power source is similar to that of a water pump. It continuously causes positive charges to accumulate on the positive electrode and negative charges to accumulate on the negative electrode, maintaining a certain voltage between the two electrodes and continuously allowing current to flow through the connecting conductor. A battery is a type of battery that can store limited electrical energy and be used in a suitable place. Its working principle is to convert chemical energy into electrical energy. It uses a lead plate filled with sponge shaped lead as the negative electrode, a lead plate filled with lead dioxide as the positive electrode, and 22-28% dilute sulfuric acid as the electrolyte. During charging, electrical energy is converted into chemical energy, and during discharge, chemical energy is converted back into electrical energy. When the battery is discharged, the metal lead is the negative electrode, which undergoes an oxidation reaction and is oxidized to lead sulfate; Lead dioxide is the positive electrode that undergoes a reduction reaction and is reduced to lead sulfate. When a battery is charged with direct current, the two poles generate lead and lead dioxide, respectively. After removing the power source, it returns to its pre discharge state and forms a chemical battery. Lead acid batteries are batteries that can be repeatedly charged and discharged, called secondary batteries. Its voltage is 2V, usually used by connecting three lead-acid batteries in series, with a voltage of 6V. The car uses 6 lead-acid batteries connected in series to form a 12V battery pack. Lead acid batteries should be supplemented with sulfuric acid after a period of use to maintain the electrolyte containing 22-28% dilute sulfuric acid

Go to the repair station for maintenance

Liquid addition, desulfurization, and reassembly

Add water on your own

Needle piercing low-temperature explosion-proof 18650 2200mah

Needle piercing low-temperature explosion-proof 18650 2200mah

Complies with Exic IIB T4 Gc explosion-proof standard

Charging temperature: 0-45 ℃

-Discharge temperature: -40~+55 ℃

-Maximum discharge rate at 40 ℃: 1C

-40 ℃ 0.5 discharge capacity retention rate ≥ 70%

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The amount of water to be added to the battery depends on the specific situation: 1. Maintenance-free batteries do not require liquid addition. 2. When adding liquid to a water battery, it is necessary to choose according to the specific gravity of the battery electrolyte: 1) The electrolyte must be prepared with chemically pure sulfuric acid (or specialized electrolyte) and distilled water. The electrolyte density is generally 1.25-1.29g/cm3 (at 15 ° C). Industrial sulfuric acid and general water, which contain impurities such as iron and copper, can cause self discharge and electrode plate damage, and cannot be used for batteries. 2) The battery is almost dead, and the specific gravity of the electrolyte is not less than 1.19. When adding liquid, choose to add distilled water near the lowest mark, and then add pure sulfuric acid (or specialized electrolyte) to make the specific gravity around 1.2, and the amount of liquid added does not exceed the upper mark. 3) After injecting electrolyte into the battery, let it stand for 3-6 hours and wait for the electrolyte temperature to drop below 35 ° C before charging. The charging time is about 3-4 hours. During the charging process, when the single cell voltage of the battery rises by 2.4V, more bubbles appear in the electrolyte. At this time, the charging current should be halved. After the charging is completed, a discharge test should be conducted to avoid sulfurization damage. The battery is only surface charged and cannot be used in practice. So before charging, it is necessary to observe that if there is sulfide precipitation in the battery, it should be replaced. 4) When fully charged, adjust the electrolyte density to: when the room temperature is 30-40 ° C, the relative density of the electrolyte is 1.270; At 20-30 ° C, the relative density of the electrolyte is 1.280; When the temperature is below 20 ° C, the relative density of the electrolyte is 1.290.

Overcharging can lead to severe water loss, and there is a high possibility of battery damage when charging continuously for several nights;

Try to avoid using it as much as possible, otherwise it may shorten the lifespan or cause the battery to fail prematurely!

According to your description, you can now try charging and discharging normally three to five times,

It is best to use low current charging (i.e. using the gear method with the longest daily charging time),

Discharge as normal

If it doesn't work, consider replacing the battery!

If you need to replenish fluids, just add pure water directly, no need for sulfuric acid!

Best answer

The formal name of a dry battery is "maintenance free battery". Compared with traditional wet batteries, the performance parameters are basically the same. In appearance, maintenance free batteries do not have a screw cap for adding electrolyte, and do not require water for maintenance during normal service life. On ordinary batteries, there are 6 (12V) caps for adding electrolyte. During use, it is necessary to regularly check the height of the liquid inside the battery and replenish the electrolyte in a timely manner.

If there is no water in the battery, distilled water or purified water can be added. The steps for adding are as follows:

1. Remove the battery from the car. At this point, be careful not to confuse the positive and negative poles, and remember the position.

2. Check if the liquid in the battery is below the minimum line. If so, add water quickly.

3. Take off the horizontal bar on the battery, it may be a bit tight. Don't worry, use force.

4. Use a syringe or pen to extract distilled water or purified water, and inject them into six separate wells. Pay attention to observing the water level when injecting water, and do not exceed the water level line.

5. Finally, after all six holes have been filled with water, replace the battery in its original position. Ignite for a while and you can charge it up.

You can try to replenish water for repair. The liquid added to batteries in the market is commonly known as dilute sulfuric acid, with a density of 1.05-1.1g/ml. Batteries only lose water during use, and sulfuric acid is not lost. Therefore, there is no need to add dilute sulfuric acid, just add water (distilled water or pure water).

Do not add tap water or mineral water, as the high content of mineral impurities and conductivity can cause the battery to self discharge excessively.

Water addition repair method:

At the end of its lifespan, the battery's storage capacity will decrease. You can try adding water to repair it. Adding water must include deionized water or purified water, and do not add tap water, as it can cause the battery to self discharge excessively. The specific methods are as follows:

1) First, completely discharge the battery, as the internal acid density of the battery is basically below 1.1g/mL after discharge;

2) Remove the cover plate and then remove the safety valve, taking care to store it properly and not dirtying it for future use;

3) Add water, usually at a rate of 1g/AH per unit;

4) Let it stand for about an hour, then install the safety valve and cover plate;

5) Charge and fully charge before fully discharging, and repeat this process three times.

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