Despite the fact that today most of the shelves in car battery stores are occupied by batteries that do not require frequent maintenance or so-called conditionally maintenance-free power supplies, there are situations when it is impossible to avoid this. One of the most important and complex service operations is the replacement of the electrolyte. We will talk further about how it is carried out, and what is needed for this.
With us you can not only buy electrolyte High Quality, but also get a full range of for checking, filling and diagnosing the battery, with the possibility of replacing the battery with a new and fresher one, with a minimum surcharge, which will save you a lot of money.
Lead-acid battery - a device designed to store energy through chemical reactions occurring in a solution of sulfuric acid and distilled water. This solution is called the electrolyte and needs to be replaced periodically. The solution to this problem is especially important when it comes to restoring an old battery. In this case, it is necessary to change the electrolyte before charging.
In order to replace the electrolyte in the battery, you will need a few tools and simple fixtures. In particular, prepare:
- An aerometer is a device for measuring the density of a liquid.
- A funnel with which the electrolyte will be poured into the "cans".
In addition, to prepare the electrolyte, you will need water and sulfuric acid (it is possible to use a ready-made solution, which is sold in stores).
Now let's move on to the main thing - consider step by step instructions for electrolyte replacement car battery:
- Before replacing the electrolyte, rinse the battery from the inside with distilled water. This will remove mechanical impurities from the body. When washing the battery, it is advisable to shake it intensively until all the coal chips come out with the water. After that, we remove salt deposits on the electrodes, and proceed to the next operation.
- We take a bottle with ready-made electrolyte, the density of which should be 1.28 g / s m³, and pour it into each of the “jars” through a funnel with a narrow neck. If necessary or desired, special additives can be added to the electrolyte at this stage, for example, to remove sulfate from the electrodes. After all the air comes out of the case under the action of the electrolyte, and the additive is completely dissolved, you can start charging. Take your time - usually the complete dissolution of the additive does not occur earlier than after 40-48 hours.
- Unscrew the plugs and connect. After replacing the electrolyte, the battery must be charged cyclically, that is, following the "charge-discharge" scheme. This process continues until the density is fully restored. In this charging mode, the current should be 0.1 A. Make sure that the electrolyte does not “boil away”. ABOUT fully charged indicates a voltage of 2.4 V for each section or 14-15 V at the terminals.
- After reaching the rated voltage, reduce charging current twice. In the event that the density remains unchanged for 2 hours, charging can be stopped.
- We discharge the battery using a current of 0.5 A until the voltage is about 10 V. From the duration of the discharge and the amount of current available, it is necessary to calculate the capacity. In the event that this indicator is below 4 ampere / hours, the charge cycle must be repeated.
- Or you can just save time those. battery and purchase a new starter battery at an additional cost.
Despite the fact that today most of the counters in stores are occupied by batteries that do not require frequent maintenance or the so-called maintenance-free, there are situations when this cannot be avoided. One of the most important and complex service operations is the replacement of the electrolyte. We will talk further about how it is carried out, and what is needed for this.
A lead-acid battery is a device designed to store energy through chemical reactions in a solution of sulfuric acid and water. This solution is called the electrolyte and needs to be replaced periodically. The solution to this problem is especially important when it comes to restoring an old battery. In this case, it is necessary to change the electrolyte before charging.
In order to replace the electrolyte in the battery, you will need a few tools and simple fixtures. Also prepare:
. Charger for 12V battery.
. An aerometer is a device for measuring the density of a liquid.
. A funnel with which the electrolyte will be poured into the "jars".
In addition, to prepare the electrolyte, you will need water and sulfuric acid (it is possible to use a ready-made solution, which is sold in stores).
Now let's move on to the main thing - consider a step-by-step instruction for replacing the electrolyte in a car battery:
1. Before replacing the electrolyte, rinse the battery from the inside with water. This will help remove contaminants from the case. When washing the battery, it is advisable to shake it vigorously until all the coal chips come out with the water. After that, we remove salt deposits on the electrodes, and proceed to the next operation.
2. We take a bottle with ready-made electrolyte, the density of which should be 1.28 g / s m³, and pour it into each of the “jars” through a funnel with a narrow neck. If necessary, special additives can be added to the electrolyte, for example, to remove sulfate from the electrodes. After all the air leaves the case under the action of the electrolyte, and the additive is completely dissolved, you can start charging. Take your time - usually the complete dissolution of the additive does not occur earlier than after 40-48 hours.
3. Unscrew plugs and connect Charger to the battery. After replacing the electrolyte, the battery must be charged cyclically, that is, following the "charge-discharge" scheme. This process continues until the density is fully restored. In this charging mode, the current should be 0.1 A. Make sure that the electrolyte does not “boil away”. Full charge is indicated by a voltage of 2.4 V for each section or 14-15 V at the terminals.
4. After reaching the desired voltage, reduce the charging current by half. If the density remains unchanged for 2 hours, charging can be stopped.
5. Discharge the battery with a current of 0.5 A until the voltage reaches 10 V. From the duration of the discharge and the amount of current available, you need to calculate the capacity. If this indicator is below 4 ampere / hours, the charge cycle must be repeated.
The fact that the car battery has become unusable can be judged by the electrolyte. When the battery is out of order, this solution changes its density, becomes bright red. A change in the color of the electrolyte indicates in large numbers oxides and sediment in the battery. Of course, you can replace the old battery with a new one. But if the battery is still new, it is possible to use another option - to change the electrolyte. This procedure is quite complicated, but even beginners can do it.
When replacing the electrolyte, all safety precautions must be observed. To perform this procedure, you need to stock up on gloves in which you will work, a piece of cloth, a rubber pear, electrolyte and a small funnel.
First you need to remove the battery from the car, wipe it with a clean cloth. Then unscrew the lids from the jars. Next, all the old electrolyte must be drained from the battery. For the next step, you need to take a rubber pear and, pressing on it, insert the spout into the jar until it stops, then release. After that, the rubber bulb should be removed and its contents poured into a specially prepared container. The whole procedure must be performed very carefully, avoiding electrolyte contact with the skin.
If you have the task of replacing traction batteries in a loader or stacker, it will be more difficult. In this case, it is better to purchase a new battery.
After the old electrolyte is removed, you need to clean the jars with a solution of distilled water. Pour water into the holes, close the lid and shake well so that all deposits are removed. After that, the jars must be filled with a solution of baking soda and left for three hours, then drained. Next, the holes are filled with a solution of common salt for about an hour. All these procedures completely clean the banks. The next step is to take the electrolyte and pour it into each of the jars to a certain level using a funnel.
Charging the battery must be started no earlier than the moment when all the air has left the battery. In addition, before charging, special additives must be added to the electrolyte, which, when dissolved, will remove excess sulfates. The dissolution process takes about 2 days. After that, the battery must be periodically charged and discharged, and then make sure that the solution does not boil away.
Such a battery with a new electrolyte can serve you for some more time. This procedure is most often necessary when you do not have the opportunity to purchase a new battery.
Most of the batteries that are equipped with modern motor vehicles, do not require special care and maintenance. However, one procedure, namely the replacement of the electrolyte in a car battery, is performed more or less regularly.
In the photo, Electrolyte is a special acid solution that ensures battery operation.
Battery fluid change
An electrolyte is a mixture of distilled water and sulfuric acid that battery vehicle, chemical reactions occur, resulting in the generation of energy to power onboard systems. Naturally, over time, this acid solution loses its properties and must be replaced, most often immediately before.
Necessary materials
You can replace the electrolyte in the battery at any car service in your city. If there is a desire to this procedure yourself, then you should purchase the following:
- a device that measures the density of a liquid (aerometer);
- battery charger;
- electrolyte.
Video process of replacing the electrolyte in the battery
To make the process of pouring liquid into the battery more comfortable, you should stock up on a regular funnel. High-quality electrolyte and "charging" are selected and bought in specialized automotive stores where you can get the necessary advice and study the range.
As for the aerometer, this device will be needed only if you plan to prepare an acidic liquid yourself, and not purchase a ready-made solution. IN similar situation you need to mix distilled water with sulfuric acid so that the density of the solution is 1.28 g / cm³. This will mean that the acid concentration is 30%.
Step-by-step instruction
Having prepared necessary appliances and electrolyte, you can begin to replace the fluid.
After draining the remaining acid from the battery, it must be rinsed well with distilled water. The washing process is carried out carefully and continues until all the coal chips and salt deposits that have accumulated inside the battery are removed.
Further, with the help of a funnel, prepared electrolyte and all kinds of additives are poured into each “jar” of the cleaned battery. The use of the latter is optional and is used to clean the electrodes. However, you should be aware that the additives dissolve only after 48 hours, and at this time the next stage of “resuscitation” of the battery will have to be postponed.
At the final stage, you need to connect the purchased starting-charging device to the battery. Please note that after changing the electrolyte, the battery needs to be charged cyclically, in other words, alternately charged / discharged at a current strength of 0.1 A and a voltage of 15 V (or 2.4 V for each specific section).
It goes without saying that electrolyte replacement is not provided for in a maintenance-free car battery. Such models need only periodic charging, nothing more.
At the moment when the measured current values coincide with the nominal values, it is necessary to lower the voltage by half and check the density of the electrolyte. If the results obtained remain unchanged for the next two hours, battery charging can be stopped.
During cyclic charging of the battery, a current of 0.5A is applied at the moment of discharge until the voltage readings drop to 10V. After that, the capacity is determined by the discharge time and the current value of the current, and if the result obtained is less than 4 A / h, the charge cycle should be repeated.
The procedure for replacing the electrolyte is quite complicated, therefore, when performing it for the first time, it is worth enlisting the support of a professional or an experienced motorist who will control the work.
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While most automotive batteries today do not require frequent maintenance (often referred to as maintenance-free power supplies), there are times when this cannot be avoided. The most complex and important service operation is the replacement of the electrolyte in the battery.
What you need to replace the electrolyte
So, lead acid battery is a device whose purpose is to store energy through chemical reactions. They occur in a solution of distilled water and sulfuric acid. In other words, in the electrolyte. It sometimes needs to be replaced. The solution to this problem is especially important when you need to restore an old battery. In order to successfully replace the electrolyte in a car battery, you need to have several devices. So, this is a 12 volt charger and an aerometer, which measures the density of a liquid. You will also need a funnel through which electrolyte is poured into the jars. Some people make this solution themselves, while others buy ready-made in stores.
Step by Step Instructions: Replacing the Car Battery Electrolyte
1. Before starting the process, you need to rinse the battery from the inside with purified water. Thanks to this, it will be possible to eliminate mechanical impurities from the body. It is worth shaking the battery vigorously when washing - so the coal crumb will come out with water. Then it is necessary to remove salt deposits from the electrodes.
2. Then you need a bottle of ready-made electrolyte. Its density should be 1.28 g/cm³. The solution must be poured into each jar, for which you need a funnel. She must have a narrow neck. Additives can be added to the electrolyte, for example, to remove sulfate from the electrodes. It is necessary to start charging when all the air leaves the case. In addition, the additive must dissolve. No need to rush, it will completely dissolve after 40-48 hours.
Accumulator charging
Replacing the electrolyte in the battery involves connecting starter charger. It is worth noting one nuance. The battery, after the electrolyte is replaced, must be charged cyclically, following a scheme called “charge-discharge”. This process will continue until the density is restored. In this mode, the current indicator should be 0.1 A. It is necessary to ensure that the solution does not “boil away”. The fact that charging is completed is indicated by an indicator of 2.4 Volts (voltage) on each section. After it is reached, it is necessary to reduce the charging current by half. And if the density does not change in the next two hours, then charging can be completed. But then you need to discharge it by applying a current of 0.5 A (until the voltage reaches 10 V).
How to calculate the capacitance index
As you could understand, in order for the replacement of the electrolyte in the battery to be successful, you need to know this indicator. It's easy to figure it out. From the time during which the discharge took place, as well as the amount of current that is available, and the capacity is calculated. It should be noted that if the capacity indicator is lower than four ampere / hour, then it will be necessary to repeat the charge cycle. Replacing the electrolyte in the battery, as you can see, the process is not very difficult. But the most important thing here is to act in stages, observing all the rules, since the result depends on how professionally the replacement is performed. Particular attention should be paid to the preparation of the electrolyte. The best option- to purchase ready-made, because if there is no experience in such a matter, it is better not to risk it.
