Here it is worth mentioning only one working method - flushing the battery with Trilon B solution. The solution contains Trilon B - 2% (wt.) And ammonia - 5% (wt.). The electrolyte is drained from the battery, washed with distilled water and the Trilon B solution is poured in. Leave to stand for about an hour. Then it is flushed with distilled water, electrolyte is poured and the battery is charged. This method can be called a working method, as many who have tried it have had a positive result. The question may arise as to 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 has served for a long time, you need to follow these recommendations:
The result of the repair always depends on the master's determination to achieve the intended effect and his willingness to spend the required amount of effort, money and time. The cost of repairing batteries must be clarified after a thorough check and diagnosis of the "disease". Repairing a car battery with your own efforts is justified if the estimate of its repair is no more than half the price of a similar new product, taking into account that most of the work will be done by hand.
Repair of a crack or a 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 understand the issues of car battery repair with your own hands - watch the video:
VIDEO
But it is better to turn to the literature on the maintenance and repair of automotive equipment of the 60-70s of the last century. Do not 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 laid out on the shelves 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, for example, polypropylene, tolerate mechanical and thermal stress well.An exception are cases when the battery case is destroyed due to the internal closure 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 stepless temperature control and a narrow slotted nozzle;
electric 100W flat tip soldering iron;
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 solder 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, use a thin drill to open tiny 1mm holes. They are needed to prevent further crack development;
we heat the staples with a soldering iron or in the flame of an ordinary candle to a temperature of 400-450 degrees. 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 use paronite, 10x15cm in size. We cut a gap in the sheet, the size and shape exactly coinciding with 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 the solder yourself. Cut off strips thin, like a thread, from the prepared polypropylene. Their length and number should correspond approximately to the volume of material required to fill the V-shaped gap. We turn it into a thin tight tourniquet;
heat the edge of the slot with a hairdryer, melt the edge of the soldering material and press it with force against the beginning of the crack. Warming up the polypropylene solder and the crack, we sequentially seal the entire gap;
in addition to soldering, the crack can be sealed with polystyrene dissolved in dichloroethane or KR-30 solvent. To apply the patch, the surface around the crack at a distance of 15-20 mm must be sanded and degreased with acetone.
Research statistics of the Battery Council Int. says - in 80% of the reason for the failure of the battery is the sulfation of the plates.
One of the available types of car battery repair with your own hands is the elimination of sulfation of the battery plates. The surface of the electrode is covered with a whitish coating, which 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 the normal charge.
Any experienced car enthusiast knows how to repair a battery with his own hands. With a low degree of sulfation of the electrodes, the sediment on the surface of the plates still has a loose and porous consistency.
Experts suggest repairing 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 dissolving salts from the surface of the electrodes will take place in the battery. Distilled water, as the salts go into solution, will turn into an electrolyte, a potential of 7-10 volts will appear at the terminals;
drain the resulting solution and rinse the battery several times, first with distilled water and then with clean electrolyte;
fill the battery capacity with fresh electrolyte of low density and put it on charge with a charge current limitation of no more than 116 of the nominal capacity for 10-12 hours;
Discharge the battery for 7-8 hours using a regular car bulb. The charge-discharge cycle must be repeated at least 4-5 times.
If there are no problems with short circuit, warping of 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 with the use of chemicals:
the electrolyte is drained from the 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, the electrolyte is poured and charged with a current of 1/10 of the battery capacity. If necessary, the procedure is repeated two to three times;
this technology allows you to simply and effectively repair batteries not only for automobiles, any similar ones, most importantly - with your own hands and forces;
Eliminating an internal short circuit in a bank is one of the last available types of battery repair with your own hands. The rechargeable battery has six groups of pairs of electrodes, called cans, assembled in a sealed case in series. Each of the cans can consist of 6-10 pairs of oppositely polarized electrodes, separated by special dielectric insulators - separators. If the separator breaks down, or for any other reason, direct contact occurs between a pair of positive and negative electrodes, the ability of the electrodes to store energy will be lost.
How to repair a battery in a similar 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 alleged cause of the closure is washed out with a flowing electrolyte - the bottom sediment of lead sludge. If 3-4 times flushing did not give the desired results, the battery is discarded.
Before deciding on the possibility and impossibility of repairing lithium batteries, they consider the serviceability of control units, controllers, wiring and a contact group.
There are several reasons for the failure of a lithium battery:
failure of the control system board (BMS), battery repair is reduced to the usual replacement of the controller;
failure of wiring, switches and load switching devices. Using an automotive 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 drawn are directly subject to repair.
How do I fix a battery?
Car battery repair: the most common malfunctions and their causes
Self-discharge
The appearance of oxidation on the lead pins
Short circuits
Damage to the case
Sulfation of plates
Broken internal network
DIY car battery repair: a list of necessary actions
How to quickly restore a dead battery
Do-it-yourself car battery repair: is it worth getting to work?
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 will consider the most common battery malfunctions.
This property is typical for absolutely all car batteries. Even an unused battery can discharge by about 1% within a day. If we are talking about an old battery, then during an idle period for a day, its charge may decrease by 3%. This feature of the battery is connected with the property of the electrolyte to exfoliate during downtime, as a result of which a denser liquid settles at the bottom of the cans. In turn, this becomes the cause of the emergence of "parasitic" 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 also has others. malfunctions:
• presence of impurities in the electrolyte;
• use of low-quality components in the battery manufacturing process;
• ingress of foreign objects inside the battery;
• contamination of the outer surface of the battery;
If you continue to use a battery with similar disadvantages, then it can be completely discharged even in one day. Such a car battery is unlikely to be repaired.
A similar malfunction is caused either by electrolyte contact with the pins and copper terminals of the battery, or by electrolyte vapors. In any case, the contact between the pins and terminals deteriorates, which is why you have to resort to self-cleaning of oxidized elements with fine-grain sandpaper. After completing the car battery repair procedure, the pins and terminals must be covered with special technical petroleum jelly, which will prevent oxidation in the future.
Short circuits of opposite-pole plates of a car battery can occur either as a result of the destruction of separators, or due to the residual active mass settling at the bottom of the battery cans. Other reasons for a short circuit include:
• excessive shaking of the battery, which is poorly fixed in the engine compartment;
• use of electrolyte with high density;
• warpage of the plates resulting from the supply of too high a current;
If the case is damaged, the car battery can also be repaired with your own hands, but the possibility of such restoration 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 is necessarily poured out and the tank is dried. After repairing the damage to the case, a new electrolyte is poured into the battery.
This is a very common cause of car battery failure, which, however, must be corrected on its own. To understand how to repair a car battery with a "diagnosis" of plate sulfation, you need to understand what is the cause of such a malfunction:
• long-term storage of batteries without recharging;
• decrease in the amount of electrolyte in the battery banks;
• use of electrolyte with high density 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 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 vehicle's battery and avoid situations that can lead to sulfation.
A similar malfunction is more likely to be typical for older battery models. However, if you are "lucky" to encounter such a battery problem, fixing it is not only easy, but also cheap. As a result of the breakage, the plates are simply disconnected from the output terminals of the battery. In order for it to work again, this connection will need to be restored.
Car battery repair 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 restore 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 desulfate the plates, you must:
1. Drain the old electrolyte from the battery, as a result of which the plates are covered with lead sulfate.
2. In a new electrolyte, dilute a special desulfating additive liquid. In this case, it is recommended to use an electrolyte with a density of 1.28 g / cm3. The amount of electrolyte to be poured 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 for connecting to charging 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 an indicator of 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.
After the repair of the car battery is completed and its capacity is restored, a little more desulfation additive must be added to the electrolyte. The battery can then be installed and connected to the vehicle.
Before you repair a dead battery, you need to check it for other breakdowns. If there are none, and the battery has sat down solely due to sulfation, it can be restored in another simple and, most importantly, quick way:
1. Fully charge the car battery.
2. Drain electrolyte and rinse the car battery with distilled water. It is better to repeat the procedure several times.
3. Fill the battery container with a special cleaning liquid, which contains 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 with new electrolyte with the recommended density and charge the battery.
6. Discharge to restore capacity.
This completes the car battery recovery process. It is only important to take into account the fact that you will have to work with aggressive liquids, therefore, they must be poured and poured 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 such a case, recharging and topping up with distilled water may be the only recovery procedures applicable to the car battery.
But if the battery is of an older model and is subject to maintenance, it is really worth repairing it. However, if you also need to replace its main components, it will be cheaper to buy a new battery, since it is not entirely advisable to invest in an old battery.
Therefore, before starting to repair a car battery with your own hands, it is worth assessing the severity of the malfunction. If in monetary terms it will cost you less to buy a new battery - do so. If you yourself cannot make such a decision, seek advice from auto repairmen.
The battery is an integral part of the vehicle. Without it, the car will not be able to move. However, the battery, like other equipment, can fail. This article will guide you through common battery problems and how to fix them.
1. What batteries are there?
3. Options for battery repair.
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, a lead acid battery is easy to repair. The service life of such a battery without repair is a couple of years.
The second type has no acid as an electrolyte. It uses a mixture with a thickener - silica gel. The advantages of a lead-gel battery are: complete absence of acid vapor emissions into the atmosphere and a long service life. But repairing such a device is extremely difficult, since there is little experience with it.
The key problem with a lead acid battery is sulfation. It arises as a result of the appearance of large sulfuric lead crystals. 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 may be a charge exchange with further dissociation. If distilled water is added to the water in time, then there is a chance to save the precious battery. But, if the battery is swollen, you should not do this. Usually such batteries are simply thrown away.
With continuous use of a battery with a low electrolyte density, 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 amount of current should be small.
2. Charge with high voltage several times.
3. Flush the battery with Trilon B. Replace the old electrolyte.
4. At the end, you need to charge. Voltage with amperage must be stable.
It takes patience to save the battery, however, the process itself is quite simple. It is necessary to carry out 5 charge cycles. The current should be minimal. The duration of each cycle will be 8 hours.
The essence of such repairs is topping up water and charging. At the same time, the water must be distilled, and the 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 for 3 cycles. The rest of the cycles run at 14.5 and 14.8 V.
Another option for repairing a battery can be charging at 1.5 Amperes. This charging takes half a day. Then a short charge is carried out and the stage is repeated. 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 at hand, then you can fix the battery in the following way. It is necessary to drain the acid, rinse the plates, pour in the solution. The solution is poured: Trilon 2% by weight and 5% ammonia. When gas evolution stops, the job is practically done. Then comes washing, 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 irreplaceable in individual designs and devices. But of course there are no eternal things on earth, and with batteries, time passes and they are no longer suitable for use, what to do? Throw 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. They mainly use acid alkaline and lithium batteries. Today we will talk about how to repair such types of batteries as lead. Acid batteries - more commonly referred to as lead-helium batteries. Two lead plates are immersed in sulfuric acid, one plate is positive, the other negative. Such batteries are most often used in automotive technology and in flashlights. They have a relatively short service life. They can be repaired (restored) in several ways.
The first method of multiple charging with a small current rating with small temporary interruptions between charges. By the end of the first and subsequent charges, the voltage on the battery gradually rises, 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 equalize, 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 accumulates 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. This cycle is repeated 5-8 times. The charging current is ten times less than the battery capacity, let's say the battery has a capacity of 1000 mA / h, then the charging current should be from 80 to 100 milliamperes.
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 baking soda and dilute with 100 ml of water. Boil water and immediately pour boiling water into the battery, wait 20 minutes and drain. We repeat this process several times. Then we rinse the battery 3 times with hot water. This recovery method is very convenient for car batteries. At the last stage of work, 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 method 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 is 80 amperes or more, we open the cans' plugs 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. In this case, 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 confuse the polarity, since the factory positive pole will already be negative, and the negative positive one, we will talk about the repair and restoration of alkaline and lithium batteries in the next article, stay with us - Arthur Kasyan (AKA).
You can also repair car batteries yourself if you understand the process and take into account the composition and characteristics of the battery.
We will list the main types of malfunctions in which the car battery is resuscitated:
break (internal) network in the battery - occurs when mechanical impact violates the integrity of the output terminals and plates;
deformation as a result of swelling of plate blocks;
the 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 the car battery;
damage to the case or cans (and sometimes both of these elements) of the battery.
When it comes to deformation of blocks, it makes no sense to repair a car battery.
It will be much cheaper and easier to purchase a new battery (in such a case, neither the reanimation of the laptop battery, nor the restoration of the battery of the mobile phone, nor any other device is performed).
A similar situation is observed when the cans or the case are damaged. In theory, repairs can be performed, but the 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 commission and restore the battery terminal.
VIDEO
Independently, any motorist is able to perform the desulfation operation of the battery plates. The need for it arises when the battery needs to return to its former performance, impaired as a result of salt deposition on the plates of the accumulator.
The procedure is performed as follows:
An additive with desulfating capabilities is dissolved in the electrolyte (it is not difficult to find the specified additive in auto shops). The density of the electrolyte should be 1.28 g / cm3.
The resulting mixture is poured 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 further reduce the current, 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 provide "reanimation" of the battery capacity. This is done like this:
current supply is limited;
the light is connected to the battery;
wait until the voltage drops at the terminals (up to 10.2 V);
the indicators of the current and the discharge time are multiplied, thereby determining the real capacity of the battery.
If, during the calculations, the capacity of the battery "does not reach" the nominal, repeat the "charge-discharge" cycle.
VIDEO
If the car battery does not hold a charge due to salt deposits on its plates, you can use another method of reanimating the battery. The scheme for 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, pour a cleaning solution (trilon plus ammonia) into the battery;
the solution is drained and the distilled liquid is again used to flush the battery;
pour in fresh electrolyte;
charging the battery.
VIDEO
Modern cars are equipped with fairly reliable batteries with long service life.
Nevertheless, regular do-it-yourself car battery maintenance will significantly increase its resource with a minimum investment of time and money.
The need for routine maintenance of this kind is due to the following factors:
During the operation of the car, deviations of the charging parameters are possible due to generator malfunctions.
Prolonged standstill of the vehicle with the battery connected leads to a gradual loss of charge.
Lack of proper care of the battery can cause its malfunction and irreversible processes that make it impossible for its further use.
Modern car batteries are of two types: serviced and unattended (GOST 53165-2008 effective from 01.07.2009).
Video - how to service a car battery:
VIDEO
The first type of batteries needs 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 lies mainly in the volume of operations carried out.
Good quality lead-acid batteries from well-known manufacturers have a lifespan of at least five years, provided they are carefully and promptly maintained. Sufficiently qualified maintenance of the car battery can be organized on its own without the involvement of specialists and contacting the service station.
The composition of routine maintenance for each type of battery is significantly different.
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 includes the following:
Inspection of the case for leaks.
Cleaning the drain holes of other battery parts from dirt.
Timely elimination of electrolyte leaks and acid neutralization with soda.
With a built-in hydrometer, the density of the liquid in the housing is continuously monitored.
Regular lubrication of the battery contacts to prevent damage.
Periodic checks of the voltage at the battery terminals with the engine running.
The latter procedure allows you to assess 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 properly. Deviations from the specified parameters indicate the wear of the generator and it is necessary to diagnose and eliminate the malfunction. After the repair, repeat the control measures in different operating modes, including with the headlights on and other consumers on.
Maintenance-free batteries do not have technological holes with plugs to control the level and add electrolyte to the required one. 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 disconnect the ground. This action will avoid self-discharge.
Video - how to check the 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 the battery charging mode. Modern chargers are mostly automatic and do not require human supervision during their use.
Devices of this type have holes for filling electrolyte, tightly closed with plugs. Maintenance of a car battery of this type is carried out in the same order as for a maintenance-free one, but at the same time it has a number of features.
It is periodically necessary to monitor 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 bulb for filling the body.
Video - how to check the density of the electrolyte in the battery:
VIDEO
Maintenance of the vehicle battery of this type includes the following operations:
Checking the reliability of the battery fastening, if necessary, tighten the nuts or bolts.
Removing oxides between battery terminals and wire clamps, treating them with grease to prevent corrosive 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 cans, which can be purchased at an auto parts store or at a pharmacy.
The density of the electrolyte is checked by a hydrometer and the level of charge is estimated from it, a decrease in this indicator by 0.01 g / cm 3 indicates a decrease in the charge by 6%.
The serviceability 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 electrolyte into cans is allowed only if clear signs of its leakage are detected. Usually, the stores offer pre-charged batteries, which allows them to be used immediately in the 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. No earlier than 20 minutes later and no 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 until the appearance of abundant gas evolution in the banks. After that, the density and level are re-controlled, if necessary, distilled water is added to the cans.
After that, the charger is reconnected for half an hour to evenly distribute the electrolyte throughout the entire volume of the cans.
The battery is now ready for use and can be installed on the vehicle for use.
Particular attention is paid to the condition of the battery in 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 start the engine reliably.
A car battery that has not been used for a long time will lose 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.
Car battery recovery is carried out in several ways:
Carry out low current charging for a long time. If at the end of the process the density begins to increase, then there is hope for a positive result. As the charge continues, it may rise to an acceptable level.
If the battery plates are in working order, 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.
A completely discharged battery can be reanimated in a specialized workshop. It uses special charging techniques in distilled water.
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. 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 low density of the electrolyte can cause it to freeze and destroy the plates.
Regular care of the battery will prolong its life and avoid sulfatization of the plates or their mechanical destruction. Correct use of the battery significantly increases its resource, which makes it possible to reduce the cost of operating the car.
Many people 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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