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How to repair lead-acid batteries

by:Power Kingdom     2021-06-11
1. First prepare the following materials: prepare the equipment repair instrument that needs to be used, including the negative pulse repair instrument, tools and materials, a flat-blade screwdriver, a straw (or disposable syringe), a transparent polyethylene tube (the diameter of which is the same as that of the straw or syringe. Match), distilled water or lead-acid battery replenisher, ABS glue or 502 glue. 2. The following points should be paid attention to during the initial charge and its capacity test: (1) For the initial charge, connect the red fish clip of the charger output line to the positive pole of the lead-acid battery being charged, and set the black output line of the charger to the positive pole of the lead-acid battery being charged. The fish clip is connected to the negative pole of the charged lead-acid battery, and then the power switch of the charger is turned on, the green power indicator light is on, and the yellow charging indicator light starts to flash within 1s. When the charged power reaches 75%, the charging indicator light starts to be steady, and the yellow saturation indicator light starts 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 10 hours, indicating that the lead-acid battery has been charged to 100%), and charging should be stopped. Turn off the power switch of the charger, remove the fish clip of the charger output line, and let the lead-acid battery stand still for 30 minutes, and then retest the open circuit voltage of the lead-acid battery. (2) Capacity test The discharge detection current of the lead-acid battery capacity tester can be adjusted from 1-10A, and it can simultaneously display the online battery voltage, discharge time, estimate the battery capacity, detect the car battery, and judge the degree of battery damage according to the discharge state. Determine the solution to the battery failure. After connecting the red and black alligator clips according to the battery polarity, turn on the power switch. The first meter will display 10.5V, which represents the discharge cut-off voltage. If you press the middle switch during this period, the cut-off voltage will be set to 0V (depth Discharge), if you do not make a selection, the instrument will automatically switch to the voltage state within 3 seconds, and the cut-off voltage is set to 10.5V by default. At this time, 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 key to view the discharge time, current, voltage and other values. After the discharge starts, switch to the current display mode, you can adjust the corresponding knob on the right to set the discharge current, the current can be adjusted from 1-10A. The battery will automatically stop when it detects 10.5V. Capacity calculation formula: discharge time X discharge current u003d battery capacity. For example: discharge for 2 hours, and the discharge current is set to 5A, then the detected capacity is: 2×5u003d10AH (Ah), if the nominal capacity of the battery shell is 17AH, Then the capacity at this time is 10AH/17AHu003d58.8% of the nominal capacity (3) How to add water to lead-acid batteries: Replenishing lead-acid batteries for electric bicycles should be carried out in accordance with the following operating procedures: ①Prepare work. Prepare electrolyte with distilled water and pure acid, the ratio is 500mL distilled water and 0.5mL pure sulfuric acid. Prepare a standard rubber exhaust valve as a spare. The required tools are screwdriver straw (can be replaced by disposable needle tube) transparent polyethylene tube (the diameter of which should fit the suction of the straw or needle tube) ABS glue. ②Pry open the cover plate above the lead-acid battery along the vent hole. The covers of some lead-acid batteries are glued with ABS glue, and the covers of some lead-acid batteries are connected with buckles. Be careful not to damage the cover when you pry the cover off. At this time, the rubber caps of the 6 exhaust valves can be seen. ③Open the rubber cap to expose the vent hole, through the vent hole you can see the inside of the lead-acid battery. The exhaust valve of some lead-acid batteries can be unscrewed, and there are some fillers around the rubber caps of some lead-acid batteries. Take care to remove the fillers. ④Suck the prepared electrolyte with a straw and inject it from the exhaust hole. The electrolyte should cover exactly 1mm of the plate. ⑤ Cover the vent hole of the lead-acid battery filled with electrolyte with a breathable shield to prevent dust from falling into the vent hole. Stand still for 24 hours and observe whether there is flowing electrolyte (free acid) inside the vent. If not, replenish the electrolyte. Put a 20cm-long transparent polyethylene sleeve on the vent hole, and charge a lead-acid battery with a nominal voltage of 12V to a 16.2V constant-voltage current-limiting charge without covering it. The CD-1205K charger is used to keep it in a charging state. After a normal full charge, it will continue to recharge and charge. It is best to put the lead-acid battery in an acid-resistant container during charging to prevent the overflowing electrolyte from polluting the environment and corroding the equipment. After charging until the red light flashes for 3 hours, it is considered that the lead-acid battery is fully charged for the first time. After the initial charge of replenishing water, check whether there is electrolyte on the surface of the lead-acid battery pole group. If there is no electrolyte, replenish the electrolyte after replenishing and charge; if there is electrolyte in the 6 grids, use a straw to suck out the excess 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 its characteristics are very good, it can not be replaced, but its elasticity must be checked; if its elasticity is not good, the exhaust valve must be replaced. For lead-acid batteries that require water replenishment, they work in a state of high sulfuric acid specific gravity before replenishing water, or there are different degrees of sulfate blooms in light or heavy, so lead-acid batteries must be pulsed after replenishing water. Sulfate flower.
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