How to prepare lead-acid battery electrolyte?

The electrolyte of a lead-acid battery is a dilute sulfuric acid solution prepared by adding concentrated sulfuric acid with water. The quality of the electrolyte has a great influence on the service life and capacity of the battery, so the correct preparation method must be mastered. The electrolyte of the lead-acid battery must use the special sulfuric acid of the battery, which should be clear, clear, colorless, and odorless; the content of iron, arsenic, manganese, chlorine, and nitride should not exceed the standard. Pure water, distilled water or purified drinking water is used as the water for preparing electrolyte. Different types of batteries have different requirements for electrolyte concentration. Considering battery power supply characteristics, battery structure, working environment, etc., you must consider the following situations: electrolyte.jpg1. Lead for mobile work Acid batteries have to adapt to field work, guard against freezing, have some restrictions on volume and quality, and are not allowed to have a large amount of electrolyte. To ensure sufficient capacity, use a higher concentration of electrolyte. The volume and quality of the fixed working battery are not too limited. Generally used indoors. 2. Within a certain range, the greater the electrolyte concentration, the greater the concentration of sulfuric acid in the active material of the electrode plate. The active material utilization rate is high, and the capacity will be increased. However, if the electrolyte concentration is too high, the resistance of the solution is increased, the viscosity is also increased, the penetration rate is low, and the self-discharge is accelerated, and the battery capacity decreases instead. If the electrolyte concentration is too high, the corrosion of the separator will be accelerated accordingly, which will shorten the service life of the battery. 3. When choosing the electrolyte concentration, the working environment temperature of the battery should also be considered. Working in cold temperatures, the electrolyte concentration should be higher, and in hot temperatures, the electrolyte concentration can be lower. 4. The electrolyte is prepared with concentrated sulfuric acid with a density of 1.84 and pure water. Sulfuric acid is a strong oxidant. It has affinity with water and releases a lot of heat when dissolved in water. Therefore, operators must wear goggles, acid-resistant gloves, rubber shoes or boots, and a rubber apron. The container containing the electrolyte must be made of acid and temperature resistant plastic, glass, ceramic, lead and other utensils. 5. Before preparation, clean the container. To prevent acid liquid from splashing on the skin, prepare 5% ammonium hydroxide or sodium carbonate solution and some clean water to prevent acid liquid from splashing. It can be quickly scrubbed with the solution, and then rinsed with water. 6. When preparing, first estimate the required amount of concentrated sulfuric acid and water, pour the water into the container first, and then slowly pour the concentrated sulfuric acid into the water. And constantly stir the solution. 7. The temperature of the newly prepared solution is very high, so it should not be injected into the lead-acid battery immediately. Wait for the temperature to drop below 40℃, then measure the concentration of the solution and adjust it to the standard value, and then add it to the battery. 8. The temperature of the newly prepared solution is very high, so it should not be injected into the battery immediately. Wait until the temperature drops below 40°C, then measure the solution concentration and adjust it to the standard value, and then add it to the battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How to deal with the expansion of mobile phone lithium battery?