Here it is worth mentioning only one working method - washing the battery with a solution of Trilon B. The composition of the solution includes Trilon B - 2% (wt.) And ammonia - 5% (wt.). The electrolyte is drained from the battery, washed with distilled water and Trilon B solution is poured in. Leave to stand for about an hour. Then, washing with distilled water is carried out, electrolyte is poured and the battery is charged. This method can be called a working one, since many who have tried it have had a positive result. The question may arise, how to flush the car battery. To do this, you need to get a pear with a nozzle. With its help, the old solution is pumped out and then a new one is poured.
So that you do not have to repair your car battery and it lasts a long time, you need to follow the following recommendations:
The result of the repair always depends on the determination of the master to achieve the intended effect and his willingness to spend the right amount of effort, money and time. The cost of repairing batteries must be specified after a thorough check and diagnosis of "disease". Repairing a car battery with your own efforts is justified if the estimate for its repair is no more than half the price of a similar new product, given that most of the work will be done by yourself.
Repair of a crack or chip in the case, violation of the integrity of the contacts will cost symbolic costs. For expensive branded models, shabby, but retaining at least half of the planned resource, battery repairs are usually carried out in car workshops.
If you have the patience and desire to figure out how to repair a car battery with your own hands, watch the video:
VIDEO
But it is better to refer to the literature on the maintenance and repair of automotive equipment of the 60-70s of the last century. Don't be confused by the age of the source - over the past 30-40 years, acid batteries have become more perfect, but the main breakdowns and repair methods have remained the same. Usually the topic - how to repair a car battery, is sorted out to the smallest detail.
Problems with the tightness of the case arise as a result of careless handling of the battery. Modern materials, shock-resistant acid-resistant plastics, such as polypropylene, tolerate mechanical and thermal effects well.The exceptions are cases when the battery case is destroyed due to the internal short circuit of the electrode plates when charging with a high current. Then a lot of heat is released, an excess pressure of gases and water vapor is formed.
To repair a crack in the battery case, you will need:
a special building hair dryer with a function of smooth temperature control and a narrow slit-like nozzle;
electric 100W soldering iron with a flat tip;
several brackets with a length of 20-25mm and a sidewall height of 2mm;
a number of strips of thin sheet polypropylene from an old battery case or special soldering material in the form of rods or tape.
We carry out repairs in the following order:
if the crack on the case is below the electrolyte level, drain it from the battery using a large medical syringe with a piece of PVC tube, 20-25 cm long;
with a sharp knife, we form a V-shaped groove along the entire length of the crack. At the ends with a thin drill, we unfold tiny holes of 1 mm. They are needed to prevent further development of the crack;
heat up with a soldering iron or in the flame of an ordinary candle the staples to a temperature of 400-450 degrees. We carefully fuse them into the edges of the crack every 12-15 mm. Such a bandage will keep the edges of the crack in contact;
we make a heat shield from a heat-resistant material, you can paronite, 10x15 cm in size. We cut a slot in the sheet, the size and shape exactly matching the geometry of the crack. We combine the cutout with the shape of the groove and securely fix it on the battery case;
for soldering, you can use a special soldering rod or tape, or you can make solder yourself. We cut off thin, like a thread, strips from the prepared polypropylene. Their length and quantity should correspond approximately to the volume of material required to fill the V - shaped gap. We turn into a thin tight tourniquet;
heat the edge of the crack with a hair dryer, melt the edge of the soldering material and press it with force to the beginning of the crack. By heating the polypropylene solder and the crack, we consistently close the entire gap;
in addition to soldering, the crack can be sealed with polystyrene dissolved in dichloroethane or KR-30 solvent. To stick the patch, the surface around the crack at a distance of 15-20 mm must be treated with emery cloth and degreased with acetone.
Research statistics of the Battery Council Int. says - in 80% the reason for the failure of the battery is the sulfation of the plates.
One of the available types of do-it-yourself car battery repair is the elimination of sulfation of battery plates. The surface of the electrode is covered with a whitish coating that prevents the normal flow of current. The capacity of the battery, even after a full discharge-charge cycle, is an order of magnitude less than a serviceable charge.
Any experienced car enthusiast knows how to repair a battery with their own hands. With a low degree of electrode sulfation, the deposit on the surface of the plates still has a loose and porous consistency.
Experts offer to repair a car battery with simple and effective procedures:
replace the electrolyte in the battery with warm distilled water. For several hours, a chemical reaction of dissolution of salts from the surface of the electrodes will take place in the battery. Distilled water, as the salts pass into the solution, will turn into an electrolyte, a potential of 7-10 volts will appear on the terminals;
drain the resulting solution and wash the battery several times, first with distilled water and then with pure electrolyte;
fill the battery capacity with fresh low-density electrolyte and charge it with a charge current limit of not more than 116 rated capacity for 10-12 hours;
Discharge the battery for 7-8 hours using a normal car light bulb. The charge-discharge cycle must be repeated at least 4-5 times.
In the absence of problems with shorting, warping of the plates, repair, the battery capacity can be restored to 80-85% of the initial one.
If the sulfation of the plates has reached 30-40% of the electrode surface, it is still possible to repair the battery with your own hands, but already with the use of chemicals:
electrolyte is drained from a charged battery and replaced with a 2% aqueous solution of Trilon B with the addition of 5% ammonia;
after 60 minutes, the solution is drained and the jars are washed with distilled water;
after washing, electrolyte is poured and charged with a current of 1/10 of the battery capacity. If necessary, the procedure is repeated two or three times;
this technology allows you to simply and effectively repair batteries not only for automobiles, but for any similar ones, most importantly - with your own hands and strength;
The elimination of an internal circuit in a bank is one of the latest available types of do-it-yourself battery repair. The battery has six groups of pairs of electrodes, called banks, assembled in series in a sealed case. Each of the jars can consist of 6-10 pairs of electrodes of different polarity, separated by special dielectric insulators - separators. If the separator is destroyed, or for any other reason, there is direct contact between the pair of positive and negative electrodes, the ability of the electrodes to store energy will be lost.
How to repair the battery in such a situation - repair is possible only if the short circuit is caused by lead microparticles that have accumulated at the bottom of the battery and formed a kind of jumper between the electrodes. To do this, a small hole is drilled in the bottom of the closed jar and the supposed cause of the short circuit is washed out with a flowing electrolyte - the bottom sediment of lead sludge. If 3-4 single washing did not give the desired results, the battery is discarded.
Before deciding on the possibility and impossibility of repairing lithium batteries, the health of the control units, controllers, wiring and contact group is considered.
There are several reasons for the failure of a lithium battery:
failure of the control system board (BMS), battery repair comes down to the usual replacement of the controller;
failure of wiring, switches and load switching devices. With the help of a car tester, they check the serviceability, and, if necessary, replace the element;
if the first two factors are excluded, the lithium cells from which the battery is assembled are subject to repair directly.
How to fix the battery?
Car battery repair: the most common malfunctions and their causes
self-discharge
The appearance of oxidation on the pins
Short circuits
Hull damage
Plate sulfation
Internal network break
Do-it-yourself car battery repair: a list of necessary actions
How to quickly restore a dead battery
Do-it-yourself car battery repair: is it worth taking the job?
To understand how to repair a car battery, you first need to understand why it does not work, and what led to the breakdown. Below we consider the most common battery malfunctions.
A similar property is characteristic of absolutely all car batteries. Even a battery that has not been in use can be discharged by about 1% during the day. If we are talking about an old battery, then in the process of downtime per day, its charge can decrease by 3%. This feature of the battery is connected with the property of the electrolyte to delaminate during downtime, as a result of which a denser liquid settles at the bottom of the cans. In turn, this causes the occurrence of "stray" currents, which cause self-discharge.
So that self-discharge does not lead to a complete failure of the battery, even during storage it should be recharged at least once every 2 months by using small currents. But if the battery discharges more than 3% during the day, it means that it has other faults:
• the presence of impurities in the electrolyte;
• use of low-quality components in the battery manufacturing process;
• ingress of foreign objects into the battery;
• contamination of the outer surface of the battery;
If you continue to use a battery with such defects, it may be completely discharged even in one day. Such a car battery is unlikely to be repairable.
Such a malfunction is caused either by contact with the pins and copper terminals of the battery electrolyte, or electrolyte vapor. In any case, contact deteriorates between the pins and terminals, which is why you have to resort to self-cleaning of the oxidized elements with fine-grained sandpaper. After completing the car battery repair procedure, the pins and terminals must be covered with special technical petroleum jelly, which will prevent future oxidation.
Short circuits of the different-pole plates of a car battery can occur either as a result of the destruction of the separators, or due to the sedimentation of active mass residues at the bottom of the battery cans. Other causes of a short circuit can be:
• excessive shaking of the battery, which is poorly secured in the engine compartment;
• use of electrolyte with high density;
• warping of the plates resulting from applying too much current;
If the case is damaged, do-it-yourself car battery repair can also be done, however, the possibility of such a recovery always depends on the degree of damage. Often the situation can be corrected with an adhesive that is suitable for fixing the material of damaged areas. During operation, the electrolyte from the car battery case must be poured out and the tank dried. After repairing the damage on the case, a new electrolyte is poured into the battery.
This is a very common cause of car battery failure, which, however, is subject to self-repair. To understand how to repair the battery of a car with a “diagnosis” of plate sulfation, you need to understand what causes such a malfunction:
• long-term storage of batteries without recharging;
• decrease in the amount of electrolyte in the battery banks;
• use of high-density electrolyte for the accumulator;
• driving a car with an over-discharged battery.
A characteristic sign of plate sulfation is the formation of lead sulfate crystals on their surface. This substance is not able to dissolve in the electrolyte and, when accumulated on the plates, does not allow the liquid to penetrate into their active mass. The result of this is a rapid decrease in battery capacity.
Every driver should take good care of the car's battery and avoid situations that can lead to sulfation.
Such a malfunction is more likely to be characteristic of older models of batteries. However, if you are "lucky" to encounter such a battery problem, fixing it is not only easy, but also cheap. As a result of a break, only the plates are disconnected from the battery output terminals. For it to work again, this connection will need to be restored.
Repairing a car battery can take a lot of time, so you should prepare for such a procedure in advance. At the same time, it is most rational to carry out the restoration of the battery only in the case of sulfation of its plates. In almost all other cases, the battery will need to be replaced. In order to perform desulfation of the plates, it is necessary:
1. Drain the old electrolyte from the battery, as a result of which the plates were covered with lead sulfate.
2. Dilute a special desulfating liquid-additive in the new electrolyte. In this case, it is recommended to use an electrolyte with a density of 1.28 g/cm3. The volume of electrolyte that needs to be filled into the battery, check with the instructions for the device.
3. Pour the resulting electrolyte into a non-working battery.
4. Unscrew the plugs on the car battery to connect to charge with a small current. It is very important that during this process the battery does not start to heat up and boil. If the voltage at the terminals rises to 13.8 V, the current will need to be reduced a little more and measure the density of the electrolyte. Re-measurement will need to be carried out after another 2 hours, and if the results obtained are identical, the battery is charged.
5. In order for the density of the electrolyte to reach 1.28 g / cm3, it is necessary either to add more electrolyte with a higher density to it, or to dilute it with distilled water.
Upon completion of the repair of the car battery and the restoration of its capacity, it is necessary to add a little more desulphating additive to the electrolyte. After that, the battery can be installed and connected to the car.
Before you fix a dead battery, you need to check it for other breakdowns. If there are none, and the battery is dead solely due to sulfation, it can be restored in another simple and, most importantly, quick way:
1. Fully charge the car battery.
2. Drain the electrolyte and flush the car battery with distilled water. It is better to repeat the procedure several times.
3. Pour a special cleaning liquid into the battery container, which includes ammonia and Trilon. Leave it in the container for about 40-50 minutes.
4. Drain the liquid and rinse the battery again with distilled water.
5. Fill in new electrolyte with the recommended density and charge the battery.
6. Discharge to restore capacity.
This completes the battery recovery process. It is only important to take into account that you will have to work with aggressive liquids, so they must be filled in and poured out carefully, after wearing rubber gloves.
Now you know how to repair a car battery, but still do not forget that in some cases such an operation is not advisable. This may be due to such a feature of modern batteries as the lack of serviceability. In this case, the only recovery procedures applicable to the car battery may be recharging and topping up with distilled water.
But if the battery is of an older design and is subject to maintenance, it is really worth taking on its repair. However, if you also need to replace its main constituent elements, it will be cheaper to buy a new battery, since it is not entirely advisable to invest in an old battery.
Therefore, before proceeding with the repair of a car battery with your own hands, it is worth assessing the severity of the malfunction. If it costs you less money to buy a new battery, then do it. If you yourself can not make such a decision, seek advice from auto repairmen.
The battery is an integral part of the car. Without it, the car will not be able to move. However, the battery, like other equipment, can fail. This article will cover common battery problems and how to fix them.
1. What are the batteries?
3. Battery repair options.
Today, there are two common types of batteries: lead-acid and lead-gel.
The first type of battery is the most common, however, manufacturers claim that such a battery cannot be repaired. In fact, such a statement is incorrect. In most cases, lead-acid batteries are easy to repair. The service life of such a battery without repair is a couple of years.
The second type does not have an acid as an electrolyte. It uses a mixture with a thickener - silica gel. The advantages of a lead-gel battery are: the complete absence of acid vapor emissions into the atmosphere and a long service life. But it is extremely difficult to repair such a device, as there is little experience with it.
A key problem with lead acid batteries is sulfation. It arises as a result of the appearance of large sulfuric acid crystals of lead. Crystals will appear only if the battery is discharged. In this case, the battery can still be saved.
Otherwise, the battery may dry out. The reason for this phenomenon can be a charge exchange with further dissociation. If you add distilled water to the water in time, then there is a chance to save the precious battery. But, when the battery is swollen, you should not do this. Usually such batteries are simply thrown away.
If you use a battery with a low density of electrolytes all the time, there is a risk of irreversible damage to the battery.
To eliminate the sulfation of a lead-acid battery, you need to work as follows:
1. Charge the battery with current several times. The current must be small.
2. Charge under high voltage several times.
3. Flush the battery with Trilon B. Replace the old electrolyte.
4. At the end, you need to charge. Voltage and current must be stable.
To save the battery, you need to be patient, however, the process itself is quite simple. It takes 5 charge cycles. The current must be minimal. The duration of each cycle will be 8 hours.
The essence of such a repair is to add water and charge. At the same time, the water must be distilled, and charging must have an adjustment function. Initially, there is a voltage of 14 V for 15 minutes. Then there is a pause (also 15 minutes). Then comes the same charge, lasting a day. This is described 3 cycles. The remaining cycles come with a voltage of 14.5 and 14.8 V.
Another battery repair option can be charging at 1.5 Amperes. This charge takes half a day. Then a short charge and a repetition of the stage are carried out. After a day, you need to check the voltage. If the voltage is less than 13 V, then the same charging cycle is repeated.
If you have Trilon B and ammonia on hand, then you can fix the battery in the following way. It is necessary to drain the acid, rinse the plates, pour the solution. The solution is poured: Trilon 2% by weight and 5% ammonia. When the gas emission stops, the work is practically done. Then comes the flushing, filling with acid and charging.The duration of such a repair will take several hours.
Batteries are a stable source of constant voltage, they are indispensable in individual designs and devices. But of course there are no eternal things on earth, so with batteries, time passes and they are no longer suitable for use, what should I do? Throw it away and buy a new one? You can of course, but it's better to try to repair them. On the market you can find a sea of batteries of different types of capacities and voltages. Mainly use acid alkaline and lithium batteries. Today we will talk about ways to repair such types of batteries as lead. Acid batteries - more often they are called lead-gelium. Two lead plates are immersed in sulfuric acid, one plate is positive, the other is negative. Such batteries are most often used in automotive technology and in flashlights. They have a relatively short lifespan. They can be repaired (restored) in several ways.
The first way is to repeatedly charge with a small current rating with small temporary breaks between charges. By the end of the first and subsequent charges, the voltage on the battery gradually increases, and it stops accepting a charge. During the break, the electrode potentials on the surface and in the depth of the mass of the plates are equalized, while the denser electrolyte from the pores of the plates flows into the interelectrode space and reduces the voltage on the battery during temporary breaks. During a cyclic charge, as the battery gains capacity, the density of the electrolyte begins to increase. When the density becomes normal, and the voltage on one section reaches 2.5-2.7 volts (the nominal value of each can is 2 volts), the charge is stopped. Repeat this cycle 5-8 times. The charging current is ten times less than the battery capacity, let's say the battery has a capacity of 1000mA / h, then the charge current should be between 80 and 100 milliamps.
The second way to restore acid batteries is to replace the electrolyte. We drain the electrolyte from the battery and rinse the battery with hot water several times. Next, take 3 teaspoons of soda and dilute in 100 ml of water. We boil water and immediately pour boiling water into the battery, wait 20 minutes and drain. This process is repeated several times. Then rinse the battery 3 times with hot water. This recovery method is very convenient to use for car batteries. At the last stage of work, we pour a new electrolyte and charge the battery for 24 hours, the repaired battery is charged once a day for 10 days, the charge lasts 6 hours, the charger parameters are 14-16 volts, the charge current is 10 amperes (no more).
The third way is reverse charging. To do this, you need a powerful voltage source (a welding machine, for example), the voltage of the charger is 20 volts, and the current strength is 80 amperes or more, we open the plugs of the cans and charge them only back - we attach the plus of the power source to the minus of the battery, and the minus of the power source to the plus battery. At the same time, the battery will boil, but do not pay attention, we charge for 30 minutes, then drain the electrolyte, rinse with hot water and pour in a new electrolyte. We take an ordinary charger with a current of 10-15 amperes and charge the repaired battery for 24 hours, just do not mix up the polarity, since the factory positive pole will already be negative, and the negative positive, we will talk about the repair and restoration of alkaline and lithium batteries in the next article, stay with us - Artur Kasyan (AKA).
Repair of car batteries can be done independently, if you understand the process and take into account the composition and features of the battery.
We list the main types of malfunctions in which resuscitation of the car battery is performed:
rupture (internal) of the network in the battery - occurs when mechanical action violates the integrity of the output terminals and plates;
deformation as a result of swelling of plate blocks;
closure of the plates, leading over time to shedding of active elements in the battery;
sulfation of the plates, which is usually caused by excessive discharge of a car battery;
damage to the case or cans (and sometimes both of these elements) of the battery.
If we are talking about the deformation of blocks, there is no point in repairing a car battery.
It will be much cheaper and easier to purchase a new battery (in such a case, neither the resuscitation of the laptop battery, nor the restoration of the battery of a mobile phone, nor any other device is performed).
A similar situation is observed in case of damage to cans or cases. Theoretically, a repair can be done, but its cost will be approximately identical to the price of a new battery.
When the plates are closed, repair work will require less financial costs. But here it is worth noting that the restoration of the capacity of a car battery during a short circuit can only be trusted by professionals who work in well-equipped car services. It is advisable for specialists to entrust and restore the battery terminals.
VIDEO
Independently, any motorist is able to perform the operation of desulfation of battery plates. The need for it arises when the battery needs to return to its former performance, broken as a result of the deposition of salt on the battery plates.
The procedure is as follows:
An additive with desulphating capabilities is dissolved in the electrolyte (it is not difficult to find the specified additive in car dealerships). The density of the electrolyte should be 1.28 g/cm3.
Pour the resulting mixture into the battery.
Connect the charger and charge the battery at a small amount of current. After the voltage at the terminals becomes 13.8–14.4 V, it is necessary to reduce the current even more, to measure the density of the mixture. After 120 minutes, the density of the electrolyte is determined again. If the results of both measurements are identical, your battery has received the charge it needs.
After all these operations, the battery should be discharged, which will ensure the "resuscitation" of the battery capacity. It is done like this:
the current supply is limited;
the light bulb is connected to the battery;
wait until the voltage drops at the terminals (up to 10.2 V);
multiply the indicators of current and discharge time, thereby determining the actual capacity of the battery.
If, during calculations, the battery capacity “does not reach” the nominal one, the “charge-discharge” cycle is repeated.
VIDEO
If the car battery does not hold a charge due to salt deposits on its plates, you can use another way to resuscitate the battery. The scheme of its implementation is as follows:
the battery is charged to the maximum value;
the old electrolyte is drained;
thoroughly rinse the battery with distilled water;
for about 45–50 minutes, a cleaning solution (trilon plus ammonia) is poured into the battery;
the solution is drained and distilled liquid is used again to flush the battery;
pour fresh electrolyte;
are charging the battery.
VIDEO
Modern cars are equipped with fairly reliable batteries with significant service life.
Nevertheless, regular do-it-yourself maintenance of a car battery will significantly increase its resource with minimal time and money.
The need for routine maintenance of this kind is determined by the following factors:
During the operation of the car, deviations in the charge parameters are possible due to generator malfunctions.
Prolonged inactivity of the vehicle with the battery connected leads to a gradual loss of charge.
Lack of proper care of the battery may cause its malfunction and irreversible processes that will make it impossible to continue using it.
Modern car batteries are of two types: serviced and maintenance-free (GOST 53165-2008 effective from 07/01/2009).
Video - how to maintain a car battery:
VIDEO
The first type of batteries needs routine maintenance in accordance with the recommendations developed by the manufacturer. The second type of batteries, despite the name, also needs periodic maintenance. The difference between them in this regard is mainly in the volume of operations.
Lead-acid batteries of good quality from well-known manufacturers have a lifespan of at least five years, provided they are carefully and timely maintained. Sufficiently qualified car battery maintenance can be organized on your own without the involvement of specialists and contacting a service station.
The composition of routine maintenance for each type of battery varies significantly.
Batteries of this type are becoming more widespread and are popular among motorists. Caring for a maintenance-free battery comes down to fairly simple steps and involves the following activities:
Inspect the hull for leaks.
Cleaning the drain holes of other parts of the battery from contamination.
Timely elimination of electrolyte leaks and acid neutralization with soda.
In the presence of a built-in hydrometer, the density of the liquid in the body is constantly monitored.
Regular lubrication of battery contacts to prevent damage.
Periodic voltage checks at the battery terminals with the engine running.
The last procedure allows you to evaluate the level of charge that the generator provides. If the voltage is in the range from 12.5 to 14.5 V, this means that the unit is working. Deviations from the specified parameters indicates the wear of the generator and it is necessary to diagnose and eliminate the malfunction. After repair, repeat control measures in different operating modes, including with headlights on and other consumers.
Maintenance-free batteries do not have technological holes with plugs to control the level and top up the electrolyte to the desired level. In the event of a critical drop in the liquid level or a decrease in density, the battery must be replaced with a serviceable one. If the car will not be used for a long time, then it is necessary to disconnect the mass. This action will avoid self-discharge.
Video - how to check a car battery:
VIDEO
A battery that is not used for a long time needs to be recharged periodically. For these purposes, special devices are used that lower the voltage to the required level and then switch to battery charging mode. Modern chargers are mostly automatic and do not require human supervision during their use.
Devices of this type have holes for electrolyte filling, tightly closed with plugs. Maintenance of a car battery of this type is carried out in the same manner as for a maintenance-free one, but it has a number of features.
Periodically, it is necessary to control the electrolyte level in the jars and determine its density using a hydrometer. The device has a number of floats with different specific gravity and a pear to fill the body.
Video - how to check the density of the electrolyte in the battery:
VIDEO
Maintenance of a car battery of this type includes the following operations:
Check the reliability of the battery fastening, if necessary, tighten the nuts or bolts.
Removal of oxides between battery terminals and wire clamps, their treatment with grease to prevent corrosion processes.
Checking the electrolyte level visually or using a special measuring tube.In the event of a drop in the level, distilled water is added to the jars, which can be purchased at an auto parts store or pharmacy.
The density of the electrolyte is checked with a hydrometer and the charge level is estimated from it, a decrease in this indicator by 0.01 g / cm 3 indicates a decrease in the charge by 6%.
The health of the battery is checked by a special device - a load plug. A working battery is considered if the voltage does not drop for at least 5 seconds.
Topping up the electrolyte in the banks is allowed only if there are obvious signs of its leakage. Typically, stores offer already charged batteries, which allows you to immediately use them on a car.
Video - do-it-yourself car battery maintenance:
VIDEO
In the case of purchasing a dry-charged battery, it must be filled with electrolyte with a density of 1.27 g / cm 3 to the specified level. Not earlier than after 20 minutes and not later than two hours, a hydrometer check is carried out.
If the density drop does not exceed 0.03 g/cm 3 the battery can be installed on the car for operation. Otherwise, you need to connect the charger. The charge current should not exceed 10% of the nominal value, the procedure is carried out before the appearance of abundant gassing in the banks. After that, the density and level are re-controlled, if necessary, distilled water is added to the jars.
After that, the charger is connected again for half an hour to evenly distribute the electrolyte throughout the entire volume of the cans.
Now the battery is ready for use and can be installed on the vehicle for operation.
Particular attention is paid to the condition of the battery in the winter. A decrease in air temperature leads to a drop in the density of the electrolyte and the level of charge, which may not be enough to confidently start the engine.
A car battery that has not been used for a long time loses its charge. If the voltage at the terminals drops below 10.5 V, then this is not enough to start the engine and the battery must be charged.
Restoring a car battery is carried out in several ways:
Charge with low current for a long time. If at the end of the process the density begins to increase, then there is hope for a positive result. With continued charging, it may increase to an acceptable level.
If the battery plates are in working condition, then it is allowed to increase the density of the electrolyte by adding sulfuric acid with a specific index of 1.4 g / cm 3.
Resuscitation of a completely discharged battery can be performed in a specialized workshop. Here, special charge techniques in distilled water are used.
Video - car battery recovery after deep discharge:
VIDEO
High-quality restoration of a car battery after a deep discharge will save a lot of money, equal to the cost of buying a new battery. At the same time, it should be remembered that the resource of such a battery is insignificant and a failure can occur at any time - especially during winter operation. Extremely low temperatures at a low density of the electrolyte can cause it to freeze and destroy the plates.
Regular care of the battery will extend its life and avoid sulphation of the plates or their mechanical destruction. Proper operation of the battery significantly increases its resource, which makes it possible to reduce the cost of operating the car.
Many are helped by comments on prohibition signs.
Video - how to restore a maintenance-free BOSCH car battery:
Video (click to play).
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