Steps for adding water to lead-acid battery
How much water is suitable for lead-acid batteries?
A 12V lead-acid battery has 6 cells, and the total amount of electrolyte in each cell is about tens to hundreds of milliliters depending on the battery capacity. Usually, only a few milliliters to tens of milliliters are needed for the parts that need to be supplemented. It is better to just soak the electrode plate group with electrolyte. The method and steps for adding water to lead-acid batteries are as follows:
Opening the lead-acid battery means opening the safety valve on the lead-acid battery to directly see the interior of the battery. The safety valve of the lead acid battery is located below the safety valve cover of the lead acid battery. The safety valve cover is generally glued or ultrasonic welded to the large cover of the lead acid battery. Make up water for lead-acid battery according to the following operating procedures.
Preparations. Use distilled water and pure sulfuric acid to prepare electrolyte, with the proportion of 500ml. Add 0.5ml distilled water and pure sulfuric acid. Prepare standard rubber safety valve for standby. Tools include: screwdriver, straw (disposable needle tube can be used instead), transparent polyethylene tube, diameter brush suitable for suction of straw (needle tube), ABS glue.
Pry the cover plate above the lead acid battery along the exhaust hole. The cover plates of some lead-acid batteries are bonded with ABS adhesive, and some lead-acid batteries are connected with buckles. Be careful not to damage the cover plate when prying it off. At this time, rubber caps of 6 safety valves can be seen.
Open the rubber cap to expose the vent hole, through which you can see the interior of the lead-acid battery. The safety valves of some lead-acid batteries can be unscrewed. There are some fillers around the rubber caps of some lead-acid batteries. Please remove the fillers.
Inhale the prepared electrolyte with a dropper and inject the electrolyte from the vent hole. The electrolyte shall cover the electrode plate for 1mm.
Cover the vent of the lead-acid battery filled with electrolyte with a breathable shield to prevent dust from falling into the vent. Wait for 24h, observe whether there is electrolyte (free acid) flowing inside the vent hole, and if there is no electrolyte, replenish it.
The amount of water supplement for six single cells of lead-acid batteries should not differ much when they are normal. The specific amount of water supplement for each lead-acid battery depends on the degree of water loss of the battery. In a word, during the whole repair process, it shall be ensured that there is flowing electrolyte in each cell of the lead-acid battery.
Put a transparent polyethylene sleeve with a length of 20cm on the exhaust hole, and conduct 16.2V constant voltage current limiting charging for the lead acid battery with nominal I2V without covering. When charging, it is better to put the lead-acid battery in an acid resistant container to prevent overflowing electrolyte from polluting the environment and corroding the equipment. After the red light starts flashing for 3h after charging, it is considered that the lead-acid battery is fully charged for the first time.
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