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How to repair lead acid batteries? What are the options?

    Lead-acid battery repair methods are mainly used to add active agent way and full charge and discharge repair method to deal with repair. For the sulfation of the battery, can be used to add active agent way, such as adding pure water and sodium sulfate and other substances of the mixture, after several normal charge and discharge, and then adjust the acid concentration to the standard value, so that part of the battery capacity can be restored. Secondly, the full charge and discharge repair method is also an effective method, that is, fully charged and then fully discharged, this method has a certain restoration effect on the battery with mild damage. In addition, shallow cycle high current charging method is also often used, through the high current charging to a slightly overcharged state, and then discharged, repeated several times in order to reduce the phenomenon of sulfation. It should be noted that the repair of lead-acid batteries is not always able to fully restore its performance, and the repair effect will vary depending on the degree of battery damage and use. During the restoration process, attention should be paid to safe operation to avoid further damage to the battery. If the battery is severely damaged or beyond repair, it is recommended to replace it with a new battery.

   Lead-acid batteries are widely used in automobile starting, uninterruptible power supply (UPS), solar energy storage systems and other fields because of their low cost, high reliability, simple maintenance and other advantages. However, with the prolongation of the use cycle, the performance of lead-acid batteries will gradually decay, a decline in charging capacity, self-discharge accelerated and other phenomena, which will require battery repair to restore its performance. The following is a detailed description of some effective lead-acid battery repair methods.


Battery basic inspection

       Before the lead-acid battery is repaired. A series of basic inspections of the battery are first required to ensure that there is no irreversible damage to the battery. This includes checking whether the battery shell has cracks, leakage of acid and other conditions; check whether the battery poles are clean, no corrosion; use a multimeter to measure the battery's static voltage is normal; check whether the specific gravity of the electrolyte and the amount of normal range.

Electrolyte maintenance and replenishment

    Maintenance of the electrolyte is crucial to the recovery of the performance of lead-acid batteries. In the course of use, the electrolyte will be reduced or change in nature due to evaporation and electrolysis, thus affecting the normal operation of the battery. In this case, the electrolyte can be maintained by the following steps:

  • Checking the electrolyte level: if the level of electrolyte is lower than that of the battery plates, it is necessary to replenish the distilled water to the specified level.

  • Specific gravity check of electrolyte: Use a hydrometer to check the specific gravity of the electrolyte. If the specific gravity is too low, it indicates that the concentration of sulfuric acid in the electrolyte is insufficient. You can add appropriate amount of dilute sulfuric acid to adjust to the appropriate specific gravity.

  • Electrolyte Replacement: If the battery has been used for many years, the corrosiveness and pollution of the electrolyte will increase, and sometimes it is necessary to replace the electrolyte with a new one.

Charging and Discharging Adjustments

    Proprior charging and discharging operations can repair certain types of battery damage and restore the battery's capacity and prolong its use. cycles. The following are some of the repair charging and discharging strategies:

  • Equalize charging: This is done by overcharging all individual batteries for an appropriate period of time, so that each individual battery is completely fully charged to achieve the purpose of restoring battery capacity.

  • Pulse charging: This is done by using a high-frequency pulse of current, which can help break up lead sulfate crystals on the battery plates and restore battery capacity.

  • Capacity Test and Discharge: Reset the capacity memory effect of the battery by discharging the battery at full capacity, followed by a full charge, and repeating this operation a few times can partially restore the effective capacity of the battery.

The use of physical methods

    In the use of lead-acid batteries, lead sulfate crystals may accumulate on the plates, and this sulfation is an important factor in reducing battery performance. This sulfation phenomenon is an important reason to reduce the performance of the battery. The following are some physical methods for removing sulfation from the battery plates:

  • Vibration: Use the mechanical force of vibration to help break up the lead sulfate crystals that have accumulated on the battery plates.

  • Temperature control: by increasing the temperature of the battery, the dissolution of lead sulfate crystals can be promoted.

  • Specialized chemical cleaning: There are some specialized chemicals on the market that can be used to clean the battery plates and remove the lead sulfate crystals.

Correct selection of charger and equipment

    Correct selection of the charger and the related equipment is also very important. Different types and capacities of lead-acid batteries need to be matched with chargers of different parameters. The use of inappropriate chargers not only can not effectively repair the battery, but will accelerate the loss of the battery. You should choose an intelligent charger with multi-stage charging function (including fast charging, equalization charging, float charging and other modes), which can adjust the charging voltage and current, and comes with pulse charging function.

Battery Care and Use Recommendations

    Finally, it is necessary to pay attention to the regular care of lead-acid batteries and the correct use of habits to prevent the battery from overcharging or over-discharge, to extend the service life of the battery. The following are some suggestions for care and use:

  • Keep the battery in a clean, dry, well-ventilated storage environment.

  • Avoid over-discharging when using the battery, and charge it regularly.

  • Avoid leaving the battery unused for long periods of time, and if there is a case of unused battery, the battery should be maintenance charged at certain intervals.

  • Correctly match the battery with the charger, avoid using poor quality chargers.

    Repairing lead-acid batteries requires comprehensive consideration of a number of aspects, such as the battery's own condition, electrolyte maintenance, charging and discharging strategies, sulfide treatment, and the correct choice of charging equipment. Through these maintenance measures, you can effectively repair some of the lead-acid battery problems and extend the battery life cycle. However, it is important to note that if the battery damage is too severe, or if it has reached the end of its designed service life, it may no longer be economical or feasible to repair it, and replacement with a new battery should be considered at this time.