AG3 battery.Starter battery (motorcycle, car battery) repair technology

　　Starter battery (motorcycle, car battery) repair technology

　　1. Startup battery (motorcycle, car battery) repair technology 1. Observation and inquiry 1. Ask about the age of the battery and whether it has been left for a long time (battery left for a long time is prone to severe sulfurization, so a small current can be used to remove sulfur first) or whether the battery is still in use. Has it been repaired? Is there any serious self-discharge (if the self-discharge is serious, the electrolyte needs to be replaced).

　　2. Observe whether the appearance is intact, whether there is any leakage, and whether the pole is damaged (this type of battery can be repaired or not). Whether the electrolyte in the battery has dried up or is very low (you can first add dilute sulfuric acid with a specific gravity of 1.28g/cm3 to between the upper and lower horizontal lines).

　　3. Observe whether there is serious deformation of the internal plates of the battery (it may be scrapped if this happens).

　　4. Use specific gravity to absorb the electrolyte in each cell, repeat several times, and observe whether the electrolyte is turbid (some electrolytes are clear, ask whether the customer has replenished water or replenished the solution himself).

　　2. Preliminary test 1. Use a hydrometer to check whether the proportions between cells are balanced. Detect single cell lagging situation. Generally, batteries with serious single cell lagging behind have a low repair rate.

　　2. Connect the battery to the high-frequency activator (the red clip is connected to the positive terminal of the battery, and the black clip is connected to the negative terminal of the battery), turn on the activation power switch, and observe the change of the voltmeter pointer:

　　① Display the battery voltage: adjust the current knob (if the battery voltage is lower than 6V, the instrument will automatically protect. At this time, you can press the reset button and then adjust the current knob) and observe the changes in the ammeter and voltmeter. If the current does not change and the voltage rises to a very high level of about 40V, this type of battery is generally severely sulfurized and can be repaired by slowly removing the sulfur with a small current. If the current can be adjusted to a very large value, you can use high current to charge the battery for about three or four minutes. Observe whether there is smoke coming out of the liquid injection hole. If there is, the bus bar of the battery may be damaged and you may consider scrapping it.

　　② Display the output voltage of the activator (the output voltage of the activator is about 48V). If the voltage does not drop after a few minutes (excluding the fuse problem on the activation line), it can be judged that the battery is open circuit. If the voltage drops slowly, the battery is basically severely vulcanized. ※Based on the above factors, determine whether to receive the battery, register the customer after receiving it, and clean the outside of the battery.

　　3. Repair steps 1. Use a high-frequency activator to charge the battery with a current of 0.1C (C represents the battery capacity, for example, for a battery with a capacity of 50Ah, the charging current is: 0.1×50=5A). When the battery voltage is charged to 14.7V, use a hydrometer to detect the specific gravity of single acid and record it. Then adjust the current to 0.05C to perform pulse desulfurization and repair. Test the acid specific gravity of a single cell of the battery in about 10 hours. If the acid specific gravity does not change, the battery vulcanization fault can be ruled out. If the acid specific gravity increases but does not meet the requirements (normal acid specific gravity value is 1.28g/cm3), continue desulfurization and repair. If the acid specific gravity does not change after long-term sulfur removal and does not meet the requirements, the acid specific gravity needs to be readjusted. If the acid specific gravity reaches the requirement, the pulse desulfurization repair can be stopped.

　　※If the battery is repaired through sulfur removal and self-discharge is not serious, the repair can be considered completed.

　　2. After the above operations, if the electrolyte of the battery is severely turbid or the self-discharge is severe (the active material falls off and deposits on the bottom, causing the positive and negative electrodes to overlap), eliminate the internal hard short circuit. Then the electrolyte needs to be replaced to solve the problem.

　　First, use the discharge current of C10 (C represents the battery capacity, for example, for a battery with a capacity of 50Ah, the discharge current is: 50÷10=5A) to discharge the battery to 0V, and pour out the electrolyte (you can pour it into plastic filled with lime) container to avoid corrosion and environmental pollution). If there are granular brown substances in the poured electrolyte, the active material of the positive plate has fallen off seriously, and the battery can be scrapped directly. After pouring out the electrolyte, clean the inside of the battery with boiling water until the poured water is no longer turbid, and finally clean it again with distilled water.

　　※The assembly space of some batteries is tight, and impurities cannot be poured out from the injection hole after settling at the bottom. In this case, it is necessary to drill holes at the bottom of the battery. Each grid is independent, so six holes need to be drilled (when drilling, you can first pour out part of the internal electrolyte and leave the impurities in one corner). After cleaning, remove the pitted surface, and then use AB glue or Other acid-resistant glue for sealing. Inject the electrolyte after 24 hours.

　　3. After cleaning, inject electrolyte with a specific gravity of 1.34g/cm3, and then use a high-frequency activator to charge the battery to 14.7V with a current of 0.1C. Then reduce the current to 0.05C and charge for about 10 hours. After fully charging, measure the specific gravity of each cell to see if it meets the requirements. If it does not meet the requirements, make a blend.

　　4. Measure the battery capacity after one day of rest. Once it meets the standards, it can be handed over to the customer for use. If self-discharge still exists, it can be treated as a scrap battery.

Read recommendations:

R20

AG9 battery.Series connection of 18650 lithium batteries

Analysis of the Causes of Lithium Battery Charging Explosion.Nickel Hydride No. 5

home solar energy storage lithium battery Vendor

Ni-MH batteries