Sealed lead acid battery repair method

Open the battery cover and remove the 6 helmets.

Fill each hole with distilled water with a syringe. If 1.28 standard electrolyte is added, the plate may burn out due to high acid dissolution. For example, when we eat hot pot, why do we eat it more and more salty? That is to say, when the water evaporates, the salt will not evaporate through the water vapor. In the same way, the acid in the battery will not be evaporated. It's water, so we just need to add about 20-30ml of distilled water to each.

Allow the battery to stand still for half an hour after filling up, allowing the sponge around the plate to absorb enough water. Then use the resistor discharge to discharge all the electricity in the battery. If there is no resistance, you can use a 12v bulb instead. For example, motorcycle headlights and car turn signals can be used as long as they can discharge to 0v. . How to judge that the battery is almost out of power, the cement resistor is discharged at the beginning of the resistor body, slowly and gradually not hot, then the battery will be out of power. If the light bulb is too direct, as long as the light is slowly turned off, it means that the battery discharge is over. The discharge time depends on the capacity of the battery when it is discharged. We can first maintain the battery when it is not powered. This can shorten the discharge time. as the picture shows:

After the end of the discharge, the battery is charged, and the pulse charging method can be used under the condition that the pulse charging method can effectively remove the vulcanization of the electrode plate and increase the capacity of the battery. Nothing can be replaced by a car charger.

After the charging is completed, use a syringe to withdraw excess water from each well. A total of 6 holes, completed step by step. Figure:

Cover the hat and lid to load the car.

1. Pulse repair method: high-frequency positive and negative pulse generator is used to continuously generate high and low frequency conversion pulses for the battery. One of them can have the condition of dissolving large lead sulfate, and the other is pulse disturbance, which destroys the condition of continuous growth of large lead sulfate. This method overcomes the limitations of the previous repair technology, has a rapidity, about 8-12 hours, high repair efficiency, low power consumption, does not cause the battery to lose water, the positive plate softens and changes the original structure of the electrolyte, etc. The repair effect of severely sulfurized lead-acid batteries is 3 to 4 times that of the past, and the repair rate is over 90%. The application of this technology reduces the amount of scrapped batteries.

2. Strong electric repair method: The strong electric repair method is a method of repairing the battery by using a persistent high voltage or a large current during charging, and is often used when the effect of the pulse repair method is not obvious. First, the high voltage repair method: This method is mainly to repair the battery with a charging voltage of 1.3-1.5 times the nominal voltage of the battery. For example, the 36V battery is charged by a 48V charger under the condition that the charging current is constant or close. The charging time should be measured and measured, and it is not easy to be too long, otherwise the battery will be heated due to gassing. This method has a certain repairing effect on a battery with short circuit and low softening of the electrode plate, but improper use may also cause damage to the pressure plate of the battery plate. Second, the high current repair method: This method is mainly to use a charging current 1.5-2.0 times higher than the usual charging current to repair the battery, such as 20AH battery using 3-4A charger for charging, pros and cons and "high voltage repair The law is the same.

3. Full charge full discharge repair method: Full charge full discharge repair method is a method of repairing the battery after the battery is fully charged and then completely discharged. The full charge and full discharge repair method mainly has a certain repairing effect on the battery with slight damage, and the method can also effectively activate the active substance in the deep layer of the battery and improve the battery capacity. Such as lightly vulcanized batteries, batteries with higher internal resistance, the key to this method is that the discharge must be sufficient, and the individual cells are fully discharged separately, fully charged and discharged 1-2 times, the capacity of the battery generally can be improved. Fully charged discharge repair method should not be used frequently, at least once every six months, and used up to three months.

4, hydration repair method: the battery "water loss" can be repaired by the method of water replenishment. The purpose is to dilute the concentration of sulfuric acid to carry out the electrolysis reaction. The hydration method is relatively simple. Just open the upper cover of the battery, you can see that there are six holes, and inject a certain amount of distilled water into each round hole, and then soak for more than 24 hours. The hydration can only be supplemented with distilled water. It is not allowed to add water of other ingredients, including pure water. Because other components have various metal molecules in the water, it is easy to cause self-discharge and damage the battery after being added into the battery.

5, re-assembly repair method: electric vehicle battery is generally a battery pack made up of several batteries in series, battery damage is multi-faceted. There may be several aspects of battery damage at the same time: for the vulcanized battery, after repair The effect is better; but for the softened and broken battery of the plate, it can be repaired immediately. Because it is a physical burn, the reuse value is not great, the use time after repair is also very short, and the effect of repair will be worse. . The best way is to replace the old battery with the repair value (replace the old battery with more than 80% capacity), and then re-group with the remaining batteries.

Generally speaking, the repair is only for batteries without quality problems. The main situation is battery vulcanization caused by over-discharge. 1. Use a silicon rectified charger to charge the current for 3-5 hours with a current of 20%, and then charge it with a battery of 10 minutes for more than 12 hours. The battery can basically be repaired; 2. It is also used by 2 times. The capacity of one-tenth of a large current is charged for 30 minutes, and then according to the above method, the method used depends on the actual condition of the battery. It is generally recommended to use the first method.

Battery repair is a general term for repairing a secondary battery that has degraded or failed performance by physical or chemical means. By repairing, the battery capacity can be restored, the battery life can be extended, and the performance of the battery can be improved.

A battery, also known as a chemical power source, is a device that can provide a DC power source for an electrical appliance. The chemical power source converts chemical energy into electrical energy through an electrochemical reaction of redox. The primary battery is a one-time application battery, and the secondary battery is a battery that can be used repeatedly, so the second time here actually means multiple times. Secondary batteries are also known as rechargeable batteries or batteries.

Battery repair refers to the collective repair of batteries that have degraded or failed performance by physical or chemical means.

A secondary battery, also referred to as a "rechargeable battery", refers to a battery that can be activated by activation of the active material after the battery is discharged. The main rechargeable batteries on the market are "nickel hydride", "nickel cadmium", "lead acid (lead battery)", "lithium ion (including lithium battery and lithium ion polymer battery)" and the like. There are many methods for repairing lead-acid batteries, such as “water therapy”, “shallow cycle high-current charging method”, “nano-carbon sol battery activator repair”, “pulse battery repair instrument repair”, “battery repair fluid repair” and so on.

Sulfation

Irreversible sulfation, referred to as sulphation. When the lead-acid battery is discharged, the positive and negative plates produce a combination of lead sulfate. Lead sulfate is a poorly soluble, non-conductive substance under normal conditions. The lead crystal formed by the battery after discharge is relatively small. When charged, it is easily dissolved and reduced to lead under the action of electricity. If used improperly, it is often insufficiently charged, dehydrated, over-discharged, etc. When coarse and hard crystals are formed, it is difficult to reduce them to lead by a general method, so it is called irreversible sulfation. Due to sulfation, on the one hand, it can block the contact of sulfuric acid with other active substances. Reacts: On the other hand, the amount of active material is reduced, which can cause the battery capacity to drop, and in severe cases, the battery life will be terminated.

Exfoliation of actives

When we repair used batteries, some batteries are filled with water and some reddish brown liquid flows out from the water injection hole. It is the active substance that falls off. The reasons for the falling off of the active substance are as follows: 1, the battery is affected by external force, such as vibration, beats and so on. 2, α-PbO2, βPbO2 variant model, αPbO2 is the active material skeleton, when the battery is charged and discharged, a part of α-PbO2 is converted into β-PbO2, resulting in softening and shedding. 3, with the cycle, activity material is gradually crystallized from the amorphous state, that is, the crystallinity increases, the number of hydrated polymer chains decreases, the gel pressure resistance increases, the electrical contact between the grains deteriorates, and the active material falls off. 4. It is also believed that with charging And the discharge continues, the active material forms a number of dense agglomerates. When there is insufficient connection between the agglomerates, the active material will fall off and the battery will fail.

Battery voltage

The potential difference between the positive and negative poles of the battery is called the voltage of the battery. It is generally measured with a multimeter. During the battery repair process, the voltage has three manifestations: the first type is the no-load voltage, also known as the open circuit voltage, that is, the battery is not charged. Battery voltage measured without load: The second type is the load voltage, which is the battery voltage measured during a certain period of battery discharge. The third type is the line voltage, which is measured at a certain time during the charging process. The voltage, understand three voltage measurement methods, to determine whether the battery is open or short circuit; battery internal resistance calculation has important significance.

Battery capacity

The capacity of the battery is an important indicator to measure the performance of the battery. It is generally expressed in ampere-hour. The general term for discharge time (hours) and discharge current (amperes), capacity = discharge time × discharge current. The actual capacity of the battery depends on the amount of active material in the battery and the utilization rate of the active material. The more the active substance is, the higher the utilization rate of the active material, and the larger the capacity of the battery, the smaller the capacity.

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