What is a maintenance battery? Maintenance-free lead-acid battery repair method introduction


  Author :Iflowpower – Portable Power Station Supplier

Sealed-free maintenance battery adopts the latest design of the 1990s and modern production technology. Enable it with high performance, long life, non-polluting, maintenance, safe and reliable performance. The general battery lead-acid battery is composed of a positive and negative plate, a partition, a housing, an electrolyte, and a wiring pile head, and the chemical reaction thereof is based on a positive electrode plate active material (lead and lead) and a negative electrode active substance.

(Sponge Pure Lead) is carried out under the use of electrolyte (dilute sulfuric acid solution), with a plate of the plate, the lead-ribs of the conventional battery, the maintenance-free battery is made of lead calcium alloy, the former with antimony, the latter With calcium, this is the fundamental difference point of the two. Different materials will have different phenomena: traditional batteries will reduce the phenomenon during use, because the bismuth on the grid will pollute the sponge pure lead on the negative plate, weaken the anti-storage battery Electric potential, cause excessive decomposition of water, a large amount of oxygen and hydrogen from the positive and negative plates, reducing the electrolyte. With calcium, it can change the back electromotive force of the fully charged battery, reducing the overcharge flow, the liquid gasification speed is reduced, thereby reducing the loss of electrolyte.

Since the maintenance-free battery is used to use a lead calcium alloy grid, the water dispensing is small, the water evaporation is low, and the shell is used to use a sealing structure, and the released sulfuric acid is very small, so it compared to the traditional battery, Without any liquid, there is no advantage of taking less pile head, wire corrosion, strong anti-charging capacity, large start current, and long battery storage time. The maintenance-free battery is due to its normal charging voltage, the electrolyte has only a small amount of gas, and the plate has strong anti-charging capability, and has a small internal resistance, the low temperature starting performance is good, and the long life is long. Therefore, there is no need to add distilled water during the entire use, and the charging system is normal, no additional charging is required.

However, the proportion of its electrolyte should be inspected during maintenance. Most maintenance-free batteries are provided on the cover with a pore liquid (temperature compensation type) specific gravity, which changes the color according to the change of the electrolyte specific gravity. Can indicate the storage of the battery and the height of the electrolyte level.

When the indication of the specific gravity is green, it indicates that the charging is enough, the battery is normal; when the indication of the green point is small or black, it indicates that the battery is to be charged; indicating that the eye shows light yellow, indicating that the battery is faulty, repair or Replace. When there is condition, charging equipment with current-voltage characteristics can be charged with a current-voltage characteristic. The device ensures sufficient electricity, and it can prevent overcharge and consume more water.

Generally, such free-maintainable batteries can be stored from the factory to use for 10 months. The voltage and capacitance remain unchanged, and the quality difference is about 3 months after the factory. At the time of purchase, there is 3 months, which can check whether the voltage and capacitance of the battery will meet the requirements of the specification.

If the voltage and capacitance have a decline, it means that the material inside is not good, then the battery is Quality is definitely not, it is possible to add water battery to charge after the dealer is charged. The maintenance-free battery can also be supplemented with charging, and the charging method is basically the same as the charging method of the ordinary battery. Each single voltage should be limited to 2.

3-2.4V during charging. Note that charging will consume more water using conventional charging methods, and the charging current should be slightly smaller when charging (5A below).

Fast charging cannot be made, otherwise, the battery may explode, resulting in hurt. When the specific gravity of the battery is maintained, it is displayed as pale yellow or red, indicating that the battery is close to the scrap, even if it is charged, the service life is not long. At this time, the charging can only be used as an emergency weight.

Lead-acid battery demolition and dismantling repair battery has the characteristics of low price, convenient carry, capacity, etc. However, if not used, it will damage the battery, and even scrapped. In fact, as long as it makes appropriate repairs, the capacity of most batteries can wait until a certain degree of recovery.

The cover of this type of battery is sealed with a sealing, and it is necessary to put it in the steamer to the sealing in the sealing and taking the hair dryer. Note that it is necessary to blow the battery's plastic shell. Battery, chemical can be converted into electric energy, called chemical cells, generally referred to as battery.

After discharge, the internal active material can be regenerated in the manner that can be stored as chemical energy; the chemical energy is converted into electrical energy when it is discharged. This kind of battery is called a battery, also known as a secondary battery. The so-called battery is a electrochemical device that stores chemical energy, and discharges electrical energy when necessary.

The maintenance battery has the characteristics of low price, convenient carrying, large capacity, and application in emergency lights, flashlight, UPS power, motorcycles, electric bicycles, electric tricycles, etc. However, if not used, it will damage the battery, and even scrapped. In fact, as long as it makes appropriate repairs, the capacity of most batteries can wait until a certain degree of recovery.

Common fix problems and treatment 1. Maintenance battery (hereinafter referred to as battery) Basically does not have air bubbles during charging, can save maintenance work in sealing. However, it is impossible to do not appear at all during charge and discharge process.

In order to release the gas, the battery cannot be completely sealed. Open the plastic cover on the upper part of the battery, you can see that there is a plus-filled hole on each small battery, and the moisture of the battery can evaporate through the rubber cap. Even if the battery is not used, the moisture will also evaporate, resulting in a decline in the battery capacity, and the battery will dry and discharge.

Regarding this battery, just add distilled water or pure water to the battery, and then carry out several charge and discharge cycles, most of the capacity of the battery can be restored. Example: A 12v7.2ah battery, the time is not long, charging to 14V, discharge, short circuit current is only 300 mAh.

Uncover the upper cover, the liquid is close to dry, inject distilled water and carry out the charge and discharge cycle, the capacity is restored to 84%, which hasomded. 2. When the battery is discharged, the sulfuric acid concentration and proportion of the electrolyte decreases, after full discharge, the specific gravity of 15 ¡ã C is lowered to 1.

11. Generally, the specific gravity is raised, the specific gravity of the summer is filled with 1.25 ~ 1.

26, and the winter is 1.27 ~ 1.28.

Because the battery is in a sealed state, when in use, only if the battery is used to determine whether it has been charged well or. When the 6V and 12V battery is fully charged, the voltages are 6.8V to 7V and 13.

6V to 14V, and the voltages of 6V and 12V cells are 5.3V and 10.6V, respectively.

The battery is false or long-term in a semi-firing state, the battery is vulcanized, the vulcanized battery cannot be eliminated by the method of adding distilled water and conventional charging, only when the concentration of the electrolyte sulfuric acid is relatively low, and vulcanization can eliminate. If the battery is not serious, the capacity is not much drop, and the battery can be charged for a small current (0.05a or less).

If the vulcanization of the battery is more severe, it can be charged to the highest voltage (6V battery charge to 7V, 12V battery charge to 14V), with a syringe to extract the electrolyte in the battery, then inject distilled water to dilute electrolyte. After charging 1 ~ 2 hours, then extract the electrolyte, inject distilled water, repeat the above operation until the specific gravity of the extracted electrolyte no longer increases significantly (general 2 ~ 3 times). At this time, the electrolytic solution is pulled out, and then the proportion of sulfuric acid from 1.

25 to 1.28 is injected according to the ambient temperature, and the electro-liquid is filled with electricity. If the specific gravity is small, the electrolyte can be extracted again and inject sulfuric acid to reach the specific gravity of the electrolyte.

Note that the electrolyte in the injection of the battery is not suitable. If the sponge-like substance in the battery is filled with electrolyte, the excess electrolyte is extracted, and the repair work is completed. Example: A Sonybp603AH battery is a power supply for 3/4-inch camera in an early 1980s, and the battery is seriously affected.

After repairing the above method, the capacity is restored to 2.2ah. 3.

Some battery connecting bridges or batteries have broken out (most cases are positive and negative lead line breaks), and the battery cannot work. Call the battery, only find the part of the break to repair. The above-mentioned method of copper-plated money is used to find a battery that is not normal or the output current is not normal or the output current is used.

The fracture point is on the battery. After found, open a hole on the plastic cover at the break, the size of the hole can be soldered by the soldering iron to the break, should not be too large. After the welding is good, the connection is inspected, and the open hole is closed with plastic or epoxy resin, and then use the above method to perform resurrection, the battery can be re-input.

4. If there is a short circuit failure within the battery, the short-voltage large current can be used to burn the short circuit point. If the active substance falls off (the brown substance is expressed in the electrolyte), the battery life has been completed, and this kind of battery will not be repaired.

However, if only one of the two battery life is terminated, this two batteries can be short-circulated, and the remaining battery can continue to use as a lower voltage battery. 2. The specific gravity is an essential tool for repairing the battery, but the commercially available specific gravity measures more electrolyte, it is difficult to use.

The author made a micro-simple proportion of the pen cap with a neutral pen and a ballpoint pen: put the specific gravity in pure water, and record the weight of the specific gravity in the water surface, this is the scale of 1.00; Place a known concentration (you can buy dilute sulfuric acid in the battery store or repair shop, you can accurately measure the specific gravity of sulfuric acid, for example, in the sulfuric acid solution of 1.28), record the specific gravity in the liquid surface; The length of the specific gravity is 1.

00 ~ 1.28 is engraved on paper, and then the scale 28 of 1.00 to 1.

28 is equal, and the specific gravity is made.

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