The battery is removed from the car for various reasons. This could be replacement of an old battery, or routine maintenance of the current one, or routine battery recharging. Not every motorist knows that it is necessary to remove the battery in a specific sequence. This allows you to save the resource of the device, and also protects the electrician of the machine from burnout.

Removing the battery is easy. Many motorists think so. However, they do not suspect that simply disconnecting the terminals from the battery pack can lead to burnout. individual nodes auto. To avoid these situations, you should know the rules for removing the battery.

Removing the battery from the car

First, you need to find out if it is possible to remove the battery from this particular car at all? The question is not as simple as it seems. With proper handling, the battery does not pose any danger, but when the ignition is turned on, the battery delivers the maximum starting current.

At this moment, in light vehicles, the current in the battery can reach 250 - 300 amperes. On freight transport there are more powerful batteries. They deliver from 500 to 1000A inrush current. This charge melts the steel wrenches left on the battery terminals.
You can imagine what will happen to the electronics in the car when a short circuit is so strong.

Important! A short circuit in a car is extremely dangerous and causes frequent fires.

Replacing the battery requires care and attention. The first thing that can suffer if the battery is removed incorrectly is ECU (the electronic unit management). Consider the cases for different carswhen replacing the battery in such a way that the electrical of the machine is not injured.

Battery and ECU

For any machines and mechanisms, there is a "golden rule" that reads as follows: before removing the battery, be sure to stop the engine! Unfortunately, not all car owners understand this. As a result, burnout of individual machine components, or complete failure of all electrical and electronics. This primarily concerns the ECU.

Important!Always stop the engine before removing the battery!

The ECU is responsible in the car for managing all electrical and electronic components. This is the "brain" of the car. IN different brands the car can have one or several ECUs. They can be responsible for both the entire electrical control, and for individual modules and nodes.

It happens that the control unit burns out or stops working correctly. The car stalls and stands up completely. The reason for the failure of the ECU may lie in the incorrect algorithm for removing the battery.

To remove the battery without damaging the ECU, you need to understand whether these components are tied to each other. Consider three categories passenger carsin which removing the battery in one way or another affects the operation of the main control unit:

• Expensive luxury foreign cars. This includes such cars as: Infinity, Lexus, BMW and other executive or luxury cars. In these cars, self-removal of the battery can drastically affect the operation of all vehicle units. Manufacturers themselves warn car owners that battery replacement on their cars can only be done at an official MOT. It is worth listening to their instructions.
• Cars with protection when removing the battery. Some cars have a special toggle switch that is responsible for safely removing the battery. Before replacing the battery, you must turn on this switch and only then proceed to remove the battery.
• The rest of the cars. Most cars are not equipped with battery removal protection. However, they do not get into trouble with the ECU when simply removing the battery. The maximum that can happen is to reset the clock on the torpedo and reset the radio station and radio equalizer settings.

Important! IN expensive cars self replacement The battery removes the car from warranty service. This condition is prescribed by both dealers and manufacturers themselves.

Any battery must be removed from the vehicle in stages. This will avoid breakdowns, and also preserve the health of the car owner. Let's consider the algorithm of actions in more detail.

Correct instruction

• Before removing the battery from the vehicle, wear long-sleeved outerwear and work gloves. This will protect the skin from accidental electrolyte spills. To remove the battery, you need keys 8 or 10. Before starting work, make sure that the engine is not running. Then proceed according to the algorithm:
• Open the hood and inspect the battery mount. In some machines, the battery is secured with a plate or bracket. Also, the battery may have a plastic cover or soundproofing. All fasteners must be removed, as well as the cover or soundproofing.

Important! Caps must be installed on the battery terminals. They are placed to avoid short circuits. Make sure these stubs are in place. The positive terminal (+) must be covered with a protective cap without fail. This is a prerequisite for safe operation while removing the retaining clip from the battery.

At first glance, all actions are very simple. However, it is this sequence of battery removal that minimizes all risks of accidental short circuit. It is also worth taking certain precautions when removing the battery.

Useful video

Check out a detailed video overview of how to remove the battery.

Precautions

The battery extraction process does not always go smoothly. In the process of work, problems may appear.

To prevent them, follow the rules:

It is important to follow these rules. Particular attention should be paid to carrying and removing the battery.

Possible problems

Even such a seemingly simple action can lead to serious problems.

The greatest danger is a short circuit in the vehicle wiring. Because of it, the insulation from the wires will instantly melt, the contact parts are soldered, and there is a high probability of a car fire.

Burnout electronic systems auto. A simple fuse, as well as individual electrical units and the ECU unit itself, can burn out.

Damage to additional devices installed on the car, for example, a radio. To prevent such consequences, all these devices should be turned off in advance.

Important! The appearance of sparks on the terminals when the battery is removed indicates that there are not disconnected devices in the car.

All of this is easy enough to avoid, it just requires removing the terminals correctly.

Conclusion

Removing the battery is a simple task. But its implementation will require a certain skill, as well as knowledge of safety rules when working with this unit of the car. It is important to remember the basic rule - never remove the battery while the engine is running!

Take the necessary precautions before disconnecting the battery. In addition to the fact that the battery contains enough energy to be fatal, it also contains corrosive substances inside it that can produce flammable gas. Before removing the battery, do the following:

• Switch off the ignition.
• Wear safety glasses and gloves to protect your eyes and hands.

Find the negative terminal on your battery. She usually has a black finish. Also, the battery may have a minus sign next to the negative terminal. There will be a plus sign next to the positive terminal on the battery, the positive terminal usually has a red cap.

Determine what size bit you need to unscrew the nut from the negative terminal. Always start with the negative terminal when you disconnect the battery.

• Take a bit and place it against the nut next to the negative terminal (but not opposite the nut). Roughly estimate the size of the bit you will need to loosen the nut.
• Put on the key bit. You may need an extension wrench to reach the nut.
• Place the key on the nut of the negative terminal and start turning it counterclockwise (to the right - tighten, to the left - loosen). You only need a couple of turns of the wrench to loosen the nut.
• Pull on the negative wire as soon as you loosen it. Move it aside so it does not touch the negative terminal of the battery while you work.
• If the cable is firmly attached to the battery post, you may need to special toolwith which you can disconnect the negative wire. See a mechanic or specialist auto parts store.

A car battery is required to start the engine and operate electronic systems when the engine is off. It should be maintained in working order - properly cleaned of settled elements of sodium carbonate, check the electrolyte level and recharge if necessary. For maintenance, sale or replacement of the battery, it must be removed from the vehicle. There are certain rules that tell you how to remove the battery from your vehicle and what precautions must be taken when doing so.

Precautions when removing the battery from the vehicle

Before removing the battery from the car, you should prepare yourself - stock up on knowledge and the necessary tools. To dismantle the power supply from the car, you will need to prepare:

• Rubber gloves to prevent electrolyte from getting on your hands;
• A wrench required to remove the terminals attached to the battery;
• Rags or unnecessary rags.

It is recommended to remove the battery from the car with rubber gloves due to the risk of electrolyte contact with the skin (in the event of a battery malfunction). The electrolyte is a sulfuric acid solution, and contact with the skin causes irritation. Over time, the electrolyte practically does not evaporate, and the longer it stays on the skin, the stronger the burn from its action.

In case the electrolyte has leaked from car battery and turned out to be on the skin, you must immediately wash it off and treat the affected area with a 5-10% soda solution.

Also, before removing the battery from the car, you should remember the basic rules for storing, dismantling and carrying it:

• The battery must not be thrown, hit, laid on its side or turned over - it must always be located strictly in an upright position so that electrolyte does not get into the ventilation holes;
• A used battery should not be stored in places with low temperatures;
• The battery terminals must be in perfect condition - only remove them using a wrench.

The battery is a complex device. It looks like reliable bulky equipment, protected from various unpleasant situations, but in reality it is not. Excessive shocks, shaking and dropping the battery lead to its failure, which is why you should be extremely careful about the process of dismantling it.

You can remove the battery from the car only with the engine off.

A careless approach to the process of removing the battery from the car can lead not only to a malfunction of the power source itself, but also to problems with other systems of the car. In particular, the electronics can be damaged if the battery is removed. To prevent this from happening, remove the battery only with the engine off.

When the engine is on, the vehicle's generator is running. Its task is to generate electricity, part of which is used to charge the battery. When the battery is removed from the vehicle on which the engine (and generator) is running, there is a sharp increase in the voltage in the on-board network. Most often, this leads to a reset of the car's electronic systems, including alarms. IN rare cases electronics can fail - multimedia systems burn out, airbags are deployed and the alarm system on the car is completely turned off.

Which terminal to remove from the battery first?

Among motorists, there is an opinion that when removing the battery from the car, the first thing to do is to remove the "minus" terminal, and then the "plus". Few car owners will be able to explain where this rule came from. If we talk from the point of view of battery safety, then it makes no difference which terminal to remove from the battery first, but we strongly recommend adhering to the rule: “ the first step is to remove the negative terminal».

The answer to the question why it is recommended to start dismantling the battery from the minus terminal is quite simple. If the first thing to do is remove the terminal from the "plus" and take it aside, and then tackle the "minus" terminal, then there is a great risk of a short circuit. It will happen if accidentally the terminal that was connected to the "plus" of the battery is connected to ground. In the event that you initially disconnect the "minus" terminal, which is shorted to the car body, then nothing terrible will happen even if it is accidentally connected to ground.

Instructions: How to remove the battery from the car

It is recommended to remove the battery from the vehicle after the engine has cooled down. This will prevent accidental scalding of your skin (or gloves) on hot engine components. As we said above, the battery should be removed only with the engine off.

The sequence of actions when removing the battery from the car:

1. Open the hood of the car and remove the "protection", if any;
2. Remove heat-insulating elements from the battery, if any;
3. Open the plastic protective caps under which the terminals are located;
4. Unscrew the nut from the terminal, which is marked with a "-" sign, then remove the terminal from the battery and take it aside;
5. Unscrew the nut from the terminal, which is marked with a "+" sign, then remove the terminal from the battery and take it aside;
6. If the battery is secured with additional fixing devices (located under the metal strips), unscrew them;
7. Carefully remove the battery, being careful not to dangle, and lower it onto a flat surface.

To install the battery on the car, you should do all the steps in reverse order. We recommend removing the battery outside or in a well-ventilated garage to avoid serious problems with electrolyte leakage.

Nowadays, it will be quite problematic to meet a car enthusiast who has not disconnected the battery from the mains of his car at least once. Most car owners do not even think about which terminal to remove first from the battery. In the same way, the battery is installed back into engine compartment... Terminals are removed and connected back in a completely chaotic manner, and no one even thinks that there is a certain course of action in this situation.

It is for this reason that various troubles and interruptions in work may arise in the future. electrical system car. This procedure is described in the vehicle's operating manual.

Any car consists of a certain set of components that cannot replace each other; each part performs its own function. The battery in itself is not a very important unit, but it requires careful attitude to itself.

The procedure for connecting and disconnecting terminals

The storage battery is a storage of electrical energy to ensure the operability of the entire electrical circuit of the car, and most importantly, its "brains" (on-board computer). Unfortunately, in our climatic conditions, motorists are forced to remove the terminals and clean their surface quite often.

In those moments when the car starts to work intermittently, each motorist simply reboots the entire system. How to do it correctly? Everything is done very simply. One has only to disconnect the negative (-) terminal from the battery for a few minutes and reconnect it. In this case, a complete reboot of the "brains" of the car occurs, all errors and shortcomings of the system are erased from memory, and the whole process of collecting statistics begins anew. This method is only used to reboot the system!

The order in which the battery is removed completely will be described below:

1. Before starting the entire operation, you must disconnect power to the electrical circuit and make sure all electrical appliances are off. Additionally, you will need 2 12 mm wrenches.
2. To avoid short circuit, and as a consequence of this, the death of electrical appliances or even a fire, the first step is to disconnect the positive (+) terminal of the battery by unscrewing the terminal fastening nuts and freely removing it.
3. Further, the nuts are unscrewed already on the negative (-) terminal and it is removed, as well as positive.
4. Disconnected battery, as a rule, stands freely in its seat, but it also happens that it is additionally fixed with bolts.
5. Fully freeing the battery from the fixing device after removing the terminals, you can remove the battery.

The sequence of installing a new battery in the engine compartment is performed in the exact opposite order to the above steps. It's worth noting that simply replacing the battery and connecting it to the electrical circuit is not all.

Full recovery of the on-board computer after replacing the battery

The "brains" of the car do not come into working position immediately after replacing the battery. The computer needs some time to diagnose the system and collect information on errors when removing the battery. This process can be accelerated. The following actions will help to bring the car to a fully operational state:

1. It is necessary to start the engine by turning on the ignition and let it run on idleuntil the temperature inside the engine is within the operating range.
2. Over the next 5 minutes, you should raise the engine speed to 2500 by simply pressing the accelerator pedal.
3. At the final stage, it will be necessary to drive a distance of 10-15 km by car. In this case, it is necessary to constantly change the driving style. With such a trip, the on-board computer will update its database faster, and its work will be more correct.

Additional procedures for removing battery terminals

In our Russian climate, the battery terminals experience additional negative external influences. They simply oxidize, and a white powder forms on their surface. The contact deteriorates several times or even disappears altogether and the battery capacity, more precisely, its charged component decreases.

To prevent the smooth operation of vehicle systems, it is sometimes recommended to carry out the following operations:

1. After removing the terminal from the battery, a little baking soda is poured onto the contacts.
2. Next, the battery terminals are cleaned with a special brush with metal pile.
3. We wash the contact points with clean water and wipe dry.
4. The final action will be to lubricate the leads. battery with technical vaseline and installation of the terminals back.

In this text, we step by step reviewed the entire process of installing the battery. Moments such as removing and reinstalling the terminals, preventive measures to increase the battery life and correct operation on-board computer... Recovering a battery is much easier than buying a new one, so after reading this article, you can protect yourself from unnecessary material waste.

The battery is usually located under the hood, so it is easy to access. However, in some brands expensive cars it can be under the seat. An even more difficult case is when there are two batteries. Such situations require professional intervention and are performed in specialized centers.

Removing the battery is essential in the following cases:

• For recharging. If the engine does not start when the ignition key is turned, it is the battery that is checked first. To do this, they remove it and bring it to a warm place to charge it.
• With prolonged non-use vehicle... If the car is not going to be used during the winter, it is left in the garage or parking lot. The battery can be completely damaged without regular recharging, so it is better to remove it for storage in a warm place.
• For service. Checking the electrolyte level, adding distilled water and measuring the density can also be carried out directly under the hood. However, this can be fraught with electrolyte leakage and damage to the battery. For such manipulations, it is better to remove the battery.
• For replacement. A battery that has completely lost its ability to charge or is simply damaged and cannot be restored is replaced with a new one. Given the service life of this part, this is done at least once every three years.

IMPORTANT! Before removing the battery, prepare necessary toolsas well as protective equipment.

When removing the battery, safety precautions should be followed, which include:

• Using protective equipment during the work. Since the battery is thirty-five percent sulfuric acid, it is best to use rubber gloves. Upon contact with the skin, this acid is gradually eaten away, which leaves significant burns. If the leak was discovered late and contact with the skin could not be avoided, the damaged area should be treated with soda diluted in water. It neutralizes acid and prevents severe burns.
• Careful handling of the battery. The operating instructions for the battery must be observed in full.
• Work with the battery should be done in a well-ventilated room or outdoors. Hydrogen is emitted from the vents of the battery, which, in significant concentrations, can cause an explosion.

Before work, you need to prepare soda alcohol or a solution of water and baking soda. If the battery is alkaline, a weak solution of any acid will help get rid of traces in time. You can use 10% vinegar or solution citric acid... Any moisture-wicking cloth or rag is also useful.

You can use protective goggles to protect your eyes from accidental sparks from the terminals. It is better to remove any metal jewelry - rings, chains, bracelets, as they can accidentally come into contact with the battery parts and become conductors of electric current. This leads not only to a short circuit, but can also harm the car owner.

ATTENTION! Proper preparation will avoid significant damage to both people and vehicles.

How to properly disconnect the car battery

The rechargeable battery holds a charge of current, which is used to:

• Starting the engine: Without a small spark from this device, the vehicle cannot be started.
• Using media devices with the engine off. This also applies to interior lighting, phone charging, and car radio operation.
• Supports the generator in cases where it cannot handle the load. Especially tangible help is provided during a long idle time in traffic jams with the air conditioner, wipers and rear window defoggers turned on.

Before disconnecting the battery, a number of manipulations should be performed:

• Be sure to turn off all devices - interior lights, radio, headlights. If the battery is removed with the instruments on, a short circuit may occur.
• Disconnect motor power. It is better to remove the keys from the ignition and put them in your pocket, as some car models will automatically lock the doors when the battery is removed, making it difficult for the owner to get inside.

A wrench is required to remove the battery, usually 10 and 13 mm wrenches are used in most models. Battery disconnection procedure:

• Open the hood;
• If soundproofing or fabric protection is installed, they must be removed;
• Open the plastic protective caps from the terminals, if any;
• Unscrew the nut on the terminal with the "-" sign;
• Remove the terminal from the battery and take it to the side;
• Unscrew the nut from the terminal with the "+" sign;
• Remove the terminal and lay it to one side.

After completing these steps, the battery is disconnected and ready to be removed. The terminal with the "-" sign should be unscrewed first, as it is connected to the car body. If you first disconnect the positive terminal, the negative terminal will remain connected and, if the key accidentally touches a metal part of the car, it can cause a short circuit.

If, when removing the battery, the terminals began to spark, this means that one of the car's devices that consumes electric current remained on.

ATTENTION! Do not hit the terminals to disconnect them. If a white coating has formed on them, first clean them with a brush (metal will not work). A special solvent can be used. After processing the terminals, they can be slightly loosened with a screwdriver, after which it will be much easier to remove.

The battery is attached under the body using a plate or a special strip. To remove the battery, you will need to disconnect it. After that, the battery is carefully removed from its place. Remember that the battery can weigh up to twenty kilograms. If your own strength is not enough to lift weights of such a weight, it is better to take care of finding an assistant in advance.

IMPORTANT! Many motorists check the amperage by hitting the terminals with metal tools. Doing so can create a noticeable electrical charge.

What not to do with the battery

There are a number of prohibitions when working with rechargeable battery... When removing the battery, you cannot:

• Lie on its side, keep it upside down. Clogging of the ventilation holes with electrolyte may occur;
• Allow mechanical impacts - impacts, falls. Physical damage can lead to depressurization of the battery and loss of properties;
• Drain and refill electrolyte. The remains float out from the bottom and plug the holes with a cement crust. You can only top up with distilled water;
• Apply force when installing the terminals on the pins. It is especially dangerous to hit them with a wrench;
• Store discharged items in frost.

These rules cannot be neglected, as this can lead not only to damage to the battery itself, but also harm the car owner.

Taking care of the removed battery

If the battery is removed for recharging, you just need to take it to a warm place and connect it to a power source. In this case, you can perform preventive cleaning, which includes:

• Cleaning all surfaces from sodium carbonate;
• Checking the tightness of the plugs twisting;
• Neutralization of precipitated electrolyte on the lid with baking soda;
• Cleaning the ventilation holes.

In this way, not only the battery itself is cleaned, but also the strips, plugs, plates and holes intended for fasteners. Before putting the battery back in place, wipe all treated surfaces dry with a rag or any suitable cloth.

How to reinstall the battery

The battery is installed in place as follows:

• The battery is carefully installed in its place;
• Fixed with a plate or strap;
• The terminal with the "+" sign is installed in place and locked;
• The terminal with the "-" sign is installed in place and fixed;
• Protective caps are closed;
• Soundproofing or fabric protection is installed in place;
• The hood closes.

After that, you should start the engine to make sure that the installed battery is working and that all the actions performed are correct.

As a rule, removing and replacing the battery is difficult only the first time. It is important to handle this part with extreme care, and also not to neglect personal protective equipment in order to protect yourself from the effects of electrolyte exposure.