Maintenance-free battery repair method introduction

The sealed maintenance-free battery adopts the latest design of the fully sealed structure and modern production process in the 1990s. It provides high performance, long life, pollution-free, maintenance-free, safe and reliable performance.

Commonly used batteries are mainly divided into four categories, namely ordinary batteries, dry load batteries, wet load batteries and maintenance-free batteries.

Ordinary battery

The plates of ordinary batteries are composed of oxides of lead and lead, and the electrolyte is an aqueous solution of sulfuric acid. Its main advantage is that the voltage is stable and the price is cheap; the disadvantage is that the specific energy is low (that is, the energy stored per kilogram of battery), the service life is short, and the daily maintenance is frequent.

Dry charge battery

Its full name is a 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 in two years. When it is used, it only needs to be added to the electrolysis. The liquid can be used after 20-30 minutes.

Wet load battery

Its plates are charged, with a small amount of electrolyte, and most of the electrolyte is drawn into a battery stored in the separator and plates.

Maintenance free battery

Due to its structural advantages, the maintenance-free battery consumes very little electrolyte and does not require supplemental distilled water for the 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 normal battery. There are two types of maintenance-free batteries on the market: the first one requires no maintenance (addition of replenishing liquid) during the one-time application of the electrolyte at the time of purchase; the other is that the battery itself has been charged with electrolyte and sealed off at the factory. The user can't add supplemental liquid at all.

Use maintenance

The maintenance-free battery can also be supplementally charged, and the charging method is basically the same as that of the ordinary battery. The voltage per cell should be limited to 2.3-2.4V during charging. Note that charging with a normal charging method consumes more water, and the charging current should be slightly smaller (less than 5A) during charging. Fast charging is not possible, otherwise the battery may explode, causing injury. When the hydrometer of the maintenance-free battery is displayed in light yellow or red, it indicates that the battery is near scrapped, and even if it is recharged, the service life is not long. Charging at this time can only be used as an expedient measure for emergency.

Proper maintenance

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

1. Check if the fixing bolt of the battery on the bracket is tight. If the installation is not secure, the housing will be damaged due to the running vibration. Also, do not place metal objects on the battery to prevent short circuits.

2. Always check if the pole and terminal are connected reliably. To prevent oxidation of the terminal, a protective agent such as petroleum jelly can be applied.

3. It is not possible to check the battery's power by direct ignition (short-circuit test), which will cause damage to the battery.

4, ordinary lead-acid batteries should pay attention to the regular addition of distilled water. The dry charge 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 proper inspection. If necessary, supplement the distilled water to help extend the service life.

5. The air holes on the battery cover should be unobstructed. When the battery is charged, a large amount of air bubbles will be generated. If the vent hole is blocked, the gas cannot escape. When the pressure is increased to a certain extent, 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 corrosion of the column, line card, fixed frame and so on. The resistance of these substances is very large and should be removed in time.

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

Role in UPS

The battery is the energy storage device of the UPS. When the mains supply is normally powered, it relies on the charging circuit to convert the electrical energy provided by the mains into chemical energy. When the mains supply is interrupted, it converts the chemical energy into electrical energy to release the uninterrupted power supply.

Battery selection

The battery selected by the UPS should pay attention to the standard machine or the short backup time must have the characteristic of outputting large current in a short time. There are 3 kinds of commonly used batteries, all of which belong to lead-acid batteries, and their models are HS (slurry high-efficiency lead battery), CS (covered lead battery) and M (sealed lead-acid battery), and sealed lead-acid batteries. It is the most commonly used. The electrolyte of the sealed lead-acid battery is basically constant and has no loss. This is because sealed lead-acid batteries use advanced cathode absorption sealing technology.

The adoption of this technology can extend the interval of adding distilled water to more than 5 years. In order to ensure safe and reliable operation of the sealed battery, the charging current required to charge the battery must not exceed the maximum charging current allowed by the battery. The UPS charger adopts the grading constant current constant voltage charging mode, that is, the constant current charging is adopted in the initial stage of charging, and the charging current is limited to a current value of a prescribed value or one tenth of the rated capacity of the battery. After charging for a certain period of time, it is changed to constant voltage charging, that is, floating charging.

1. Receive the battery to make a record, ask for the situation, and post the label. 2. Make a repair record and measure the open circuit voltage.

3. For normal use of the battery, the voltage should not be lower than 11 volts. If it is lower than 11 volts, there is a possibility of disconnection. If the battery is placed for a long time. For example, a battery higher than 9 volts can be charged first. If the battery is lower than 9 volts, the battery is first repaired with water, and the battery is recharged when the voltage is higher than 9 volts.

4. If the battery is hot during the charging process. It means that the battery plate is softened. If the battery is softened, it can be repaired, and severe softening can not be repaired. Slight heating can stop charging and wait for the temperature to drop and then recharge.

5. Perform capacity test after fully charged. During the detection process, the measurement of the battery cell can be measured, the positive electrode of the multimeter is connected to the positive electrode of the battery, and the negative electrode is connected to the tin bar.

The voltage measured by inserting the tin bar into the first cell is such that the voltage of the first cell is less than 1 volt. The normal voltage should be above 1.5 volts. If the battery has a broken grid, it cannot be repaired.

6. How to measure the voltage of the single cell “Through the two tin bars, the positive and negative poles of the battery are closest to the single cell. Use the positive pole of the multimeter to connect the positive electrode of the battery, and the negative electrode to the tin bar (the tin bar is inserted into the first cell)” The measured voltage is the first cell voltage. Then connect the positive pole of the multimeter to the tin bar in the first cell, and the negative pole to the tin bar of the second cell, and the measured voltage is the second cell voltage. Similarly, the third, fourth, fifth, and sixth cell voltages are the same as the second cell voltage measurement method. Note: The measurement of the single cell voltage is the most accurate when measured at the time of fast discharge.

7. For batteries below 14AH, the discharge time is less than 50 minutes and the water is deeply discharged. For batteries with a temperature above 17AH, the discharge time is less than 80 minutes, and the water is deeply discharged. Generally, the battery should be filled with water for more than half a year. After deep discharge, first repair the battery, wait for the voltage to rise to 10 volts and then replenish the water. After the saturation light is always on, the hydration charging lamp will flash for more than three hours.

8. Repair the battery after replenishing the water. The repair time should be at least 24 hours. If the capacity is large, the repair time can be increased.

9. After the repair, it is necessary to carry out hydration charging. The charging time of the hydration is generally not too long. Some may be full when it is hung up, and some may be filled for a few minutes. No matter the length of time, this step must be carried out.

10. After the supplementary charging, the capacity check can be performed again for the capacity below 14AH to reach 70%. Generally, it can reach 150 minutes or more at (17 minutes or more) 17AH or more. For 70% of the battery, you can pump out the excess water inside the battery. If you can't reach it, don't pump it. Wait for it to be repaired again.

Note: When adding water, try to meet the requirements as much as possible. If there is a lot of time, wait until the electricity is discharged before pumping excess water.

11. Charge the battery after testing. If less than 70% of the repair process can be carried out as above, if it reaches 70%, it can be fully charged and put on the measurement voltage group for more than 2 hours.

12. If the capacity has not increased after the secondary repair, there is no need to repair it. If there is an increase, but it can not meet the requirements, it can also be repaired for the third time; if it does not increase, it may be that the active substance falls off (when the water is taken out, if the water turns red and purple), it is serious. There is no need to fix it.

13, matching: support the following categories (a set of batteries)

1.27mm Ejector Header Connector

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