How to repair lead-acid battery

2. Attention should be paid to the initial charging and its capacity test:

(1) Initial charging Connect the red fish clip of the charger output line to the positive pole of the charged lead-acid battery, connect the black fish clip of the charger output line to the negative pole of the charged lead-acid battery, and then Turn on the charger's power switch, the green power indicator will light, and the yellow charge indicator will begin to flash within 1 s. When the incoming charge reaches 75%, the charge indicator light starts to illuminate and the yellow saturation indicator begins to flash. When the saturation indicator is always on, it indicates that the lead-acid battery has been charged to 100% (the saturation indicator flashes for more than 10h, indicating that the lead-acid battery has been charged to 100%), and the charging should be stopped. Turn off the power switch of the charger, remove the fish clip of the charger output line, make the lead-acid battery stand for 30 minutes, and then re-test the open circuit voltage of the lead-acid battery.

(2) Capacity test The lead-acid battery capacity tester discharge detection current 1-10A can be adjusted, can simultaneously display the online battery voltage, discharge time, estimate the battery capacity, can detect the car battery, and judge the battery damage according to the discharge state, thereby Determine the treatment plan for battery failure. After the red and black alligator clips are connected according to the polarity of the battery, turn on the power switch. The first meter will display 10.5V, which represents the discharge cutoff voltage. If the middle switch button is pressed during this period, the cutoff voltage will be set to 0V (depth). Discharge), if you do not choose, the instrument will automatically switch to the voltage state within 3 seconds, the cutoff voltage is set to 10.5V by default. At this point, the voltmeter will display the no-load voltage of the connected battery. After pressing the start button, the battery will start to discharge detection. Press the middle conversion button to check the discharge time, current, voltage and other values. After the discharge starts, switch to the current display mode, and adjust the discharge current by adjusting the corresponding knob on the right. The current can be adjusted from 1-10A. The battery detects an automatic shutdown of 10.5V. Capacity calculation formula: discharge time X discharge current = battery capacity For example: discharge for 2 hours, discharge current is set to 5A, then the detected capacity is: 2 × 5 = 10AH (ampere hour), if the battery casing nominal capacity is 17AH, Then the capacity at this time is 10AH/17AH=58.8% of the nominal capacity.

(3) Water supply method for lead-acid batteries: The water supply for electric bicycle lead-acid batteries should be carried out according to the following operating procedures:

1 Preparations. The electrolyte was placed with distilled water and pure acid in a ratio of 500 mL of distilled water to 0.5 mL of pure sulfuric acid. Prepare a standard rubber exhaust valve for use. The required tools are a straw (can be replaced by a disposable needle) transparent polyethylene tube (the diameter of which is suitable for the suction of the straw or needle) ABS glue.
2 Open the cover above the lead-acid battery along the vent hole. Some lead-acid battery covers are bonded with ABS glue. Some lead-acid battery covers are connected by snaps. Be careful not to damage the cover when opening the cover. At this time, you can see the rubber of the six exhaust valves.
3 Open the rubber and expose the vent hole. The inside of the lead-acid battery can be seen through the vent hole. Some lead-acid batteries have an exhaust valve that can be unscrewed. Some lead-acid batteries have some filler around the rubber. Take care to remove the filler.
4 Pipette the dispensed electrolyte and inject it from the vent. The electrolyte should cover exactly 1 mm of the plate.
5 Cover the vent hole of the lead-acid battery filled with electrolyte with a gas permeable covering to prevent dust from falling into the vent hole. After standing for 24 hours, observe whether there is a flowing electrolyte (free acid) inside the vent hole. If not, replenish the electrolyte.

A 20 cm long transparent polyethylene sleeve was placed on the vent hole, and a lead-acid battery with a nominal voltage of 12 V was subjected to constant current limiting current charging at a nominal voltage of 12 V without covering. Use the CD-1205K charger to make it charge. After normal charge, it will continue to charge the water. When charging, it is best to place the lead-acid battery in an acid-resistant container to prevent the spilled electrolyte from polluting the environment and corroding the equipment. After charging to red light for 3 hours, the lead-acid battery is considered to be fully charged for the first time.

After the initial charge of the hydration, check whether there is electrolyte on the surface of the lead acid battery. If there is no electrolyte, replenish the water after replenishing the electrolyte; if there are electrolytes in the six cells, use a pipette to draw more electrolyte. After closing the exhaust valve, pay attention to restore the filling. If the rubber exhaust valve is opened and it is found to be damaged, it is best to replace it. If the characteristics are good, it is not necessary to replace it, but it is necessary to check its elasticity; if the elasticity is not good, the exhaust valve must be replaced.

Before the lead-acid battery that needs to be replenished, the lead-acid battery works under the condition of high sulfuric acid specific gravity, or the sulfate flower is light or heavy, so the lead-acid battery should be pulsed after the water is replenished. Sulphate flower. Pay attention to the following points when adding electrolyte or hydrating to lead-acid batteries:

1 The electrolyte height can be 1.0 to 1.5 mm. For two red lines, the electrolyte must not exceed the red line above. When the electrolyte is too full, it will overflow from the small hole in the lead-acid battery cover. Since the electrolyte is electrically conductive, a self-discharge circuit is formed once it flows between the positive and negative electrodes of the lead-acid battery. In this case, the electrolyte should be wiped off or rinsed off with water.
2 If something accidentally falls into the electrolyte, do not use metal objects to fish, use wooden sticks to remove impurities. If you use iron wire or copper wire to fish, the metal molecules will enter the lead-acid battery under the corrosion of sulfuric acid to form self-discharge, which will damage the lead-acid battery.
3 In the process of charge and discharge repair of lead-acid batteries, the water in the electrolyte will gradually decrease due to electrolysis and evaporation, resulting in a drop in the electrolyte level. If it is not replenished in time, it is possible to shorten the service life of the lead-acid battery, and the distilled water should be replenished in time.

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