Do lead-acid batteries need to add electrolyte 1 article Make it clear

Do lead-acid batteries need to add electrolyte? 1 article Make it clear

Lead-acid batteries are generally only filled with electrolyte, which is a dilute sulfuric acid solution prepared in a certain proportion, when used for the first time. If the electrolyte is insufficient after use, do not add more electrolyte, otherwise the acid concentration may be too high and the battery plates may be burned. At this time, special supplementary fluid or distilled water should be added, and it is best to use a hydrometer to measure the specific gravity of the electrolyte in the battery. Under normal circumstances, the specific gravity of the electrolyte is 1.280 at 20 degrees Celsius above zero.

The above is only for ordinary dry-charge batteries. There will be two engraved lines on the battery casing. The electrolyte should be kept between these two engraved lines, neither lower than the lower engraved line nor higher than the upper engraved line, otherwise it is not good and will not work.

But now more and more lead-acid maintenance-free batteries are used. This kind of battery only adds electrolyte when used for the first time, and then stamps the number and closes the lid. There is no need to check or replenish, add electrolyte, replenishing fluid or distilled water and other liquids in the future. Moreover, the battery cover cannot be opened, otherwise the battery may be damaged. If this kind of battery loses power, just use the charger to charge it directly. If it cannot be charged or the battery does not retain power after charging, it means that the service life of the battery has expired and it is time to replace the battery with a new one.

The electrolyte of lead-acid batteries is prepared from special sulfuric acid and distilled water in a certain proportion. The density is generally 1.24-1.30 grams per cubic centimeter. Specific gravity 12.75-12.85G/CM3 sulfuric acid and pure water. If the water is consumed during battery use, just add pure water to charge.

Lead-acid batteries can be filled with electrolyte. The electrolyte of lead-acid batteries is prepared from special sulfuric acid and distilled water in a certain proportion. The density is generally 1.24-1.30 grams per cubic centimeter. Specific gravity 12.75-12.85G/CM3 sulfuric acid and pure water. If the water is consumed during battery use, just add pure water to charge.

If the electrolyte of the previous lead-acid battery is lost, replenish some. The added water is distilled water, which has no impurities and is not ordinary tap water. If there are many maintenance-free batteries nowadays, there is no need to add electrolyte.

When lead-acid batteries first leave the factory, electrolyte has been added (the electrolyte is sulfuric acid with a specific gravity of about 1.28). If water shortage occurs during use, distilled water can be added. However, some batteries are lean batteries, and it may be difficult to add water.

Lead-acid batteries are commonly used in automotive applications
Lead-acid batteries are commonly used in automotive applications

What kind of battery fluid should be added to lead-acid batteries?

The electrolyte of lead-acid batteries is generally a sulfuric acid aqueous solution. The general service life of old ordinary batteries is about 2 years, and the electrolyte level needs to be checked regularly and distilled water added. However, with the development of science and technology, the service life of lead-acid batteries is getting longer and longer, and maintenance is becoming easier and easier.

According to different classifications, lead-acid batteries include ordinary batteries, dry rechargeable batteries and maintenance-free batteries.

The plates of ordinary batteries are composed of lead and lead oxide, and the electrolyte is a sulfuric acid aqueous solution. Its main advantages are stable voltage and low price; its disadvantages are low specific energy (that is, the amount of electrical energy stored per kilogram of battery), short service life and frequent daily maintenance.

The full name of dry rechargeable battery is dry rechargeable lead-acid battery. Its main feature is that the negative plate has high energy storage capacity. In a completely dry state, two years’ worth of electricity can be stored. When using, just add electrolyte and wait 20-30 minutes.

Due to its structural advantages, maintenance-free batteries consume very little electrolyte and basically do not need to replenish distilled water during their cycle life. It has the characteristics of impact resistance, high temperature resistance, small size and low self-discharge. Typically lasts twice as long as regular batteries

Can battery fluid be replaced with mineral water?

As for the question of whether the battery fluid can be replaced by mineral water, the answer is no. Because mineral water is not suitable as a substitute for battery fluid.

Battery fluid generally refers to the electrolyte of lead-acid batteries, and there are two types of lead-acid batteries. One type needs to be supplemented with acid, usually dilute sulfuric acid, but because it is inconvenient, this kind of battery fluid is basically not used.

The other is pure or distilled water, to which some necessary electrolytes may be added. This battery fluid is used for rehydration. Today’s good lead-acid batteries are basically maintenance-free and do not require refilling.

The electrolyte of lead-acid batteries is usually dilute sulfuric acid, but the sulfuric acid will not be reduced, so it can only be replenished with pure or distilled water. If it is splashed by battery fluid, rinse it with plenty of water.

Because the small units in the battery are not connected, you need to add water to the battery fluid one by one, being careful not to exceed the upper limit.

Proper maintenance ensures longevity of lead-acid batteries
Proper maintenance ensures longevity of lead-acid batteries