In the process of operation rechargeable battery The car always needs to be remembered that the regular check of its voltage level prevents the "sudden" stop of the engine and allows you to miss the moment when the battery will need to connect the charger to it. It is possible to understand that the battery is charged, when using such an instrument as a multimeter. He must be present in the arsenal of every motorist. Any driver needs to be aware of how to check the battery charge by a multimeter.

What is a multimeter

This is a multi-purpose electrical device, with which you can measure, at least, voltage, ampero and resistance level. For simplicity, it is often called the tester. Used in all spheres of electronics. There are multimeters with the measurement option even water temperature or surrounding air.

Any multimeter has two wires with contacts with the possibility of connecting to different "sockets" - depending on which indicators we need to measure. It is always important to remember that red wire - this is "Plus" Pole , but the black - minus. The main purpose of metal contacts at the end of the wiring is a direct connection to the terminals of a car battery.

Checking the battery charge by this device can be carried out, anywhere: on the street, in the garage, at home. During the check, you can install a multimeter at a convenient place by car. The main thing is to know the correct sequence of simple actions in order to correctly determine all the necessary indicators.

How to use the multimeter

Measuring the battery voltage, it should be remembered that such a charging check starts from setting the instrument switch to the correct mode.

IN this case We will need a voltage mode (not to be confused with an empty):

• The switch must be set at the 20 Volt. This means that all indicators will be available to us below 20 volts.
• Wires from the tester It is important to bring to the car battery correctly By connecting to its terminals as follows: The wire of the black color is displayed on the minus pole of the battery, and the wire of the red color is on the positive.
• Now the multimeter will show what battery charging level.

How to find out if the voltage indicator is normal and does the battery need to subscribe to its standard charger? For this, there is a specific scheme that allows you to check how the battery is charged and what is the level of discharge of the battery, if available.

So:

• is 12.7 V. (Sometimes 13.2 is a maximum). If after charging the indicator above, the battery needs to be able to "stand out" for several hours. Then U will be 12.7 V. This is a 100% charge, the battery is well charged.
• If the battery voltage is 12.1-12.4 V, the discharge is about 50%. Soon you will need to charge the battery.
• With the indicators of 11.6-11.7 V - the full digit of the battery, 100%. He urgently needs to be charged Otherwise, destruction can begin inside the battery. The plates will begin to be covered with salt, and it will be necessary. Or the battery can freeze into the cold, because it falls.

After finding out how to check the battery charge by a multimeter, it is important to take note that the working battery charge level, and the level of its capacity is better to check with. The multimeter shows the voltage without load when the car is alone. And the plug helps measure u when simulating a car start. During the inspection under load, the voltage "sends" to 9 volts, and then it should recover to the initial level. If it falls below 6 V, the battery capacity is very low.

Checking the charge car from the generator

In order to understand how to check the battery charging from the generator, you must first of all know that the generator performs an important role in the current automotive battery power. When the car engine is in working condition, it is the generator that makes a specific voltage, thanks to which the machine battery is charged on the go. Similarly, in the process of movement, the entire side electrical system cars. There is a charge The battery from the generator means the battery has the ability to always be in the rechargeable state and work longer.

As for the voltage indicator, the level U of the generator and the plus pole of the battery are always the same - due to the same interconnected by the same wire.

If the engine of the machine is in working condition, the voltage must be more than 12 volts And do not go downRegardless of whether the entire onboard load of the car is included, or not.

In order to check how the battery is charging from the generator, it is working or not, it is necessary to connect the multimeter wires to the battery and first measure the voltage indices without load. In this case, on the idling The level U is 13.5-14 volts .

After preliminary measurements alone, we check the system voltage already under load. You can turn on successively all heating, fan, emergency system and light. Please note that the voltage should not "see" below 13.3-13.8 volts. If the indicator is such - this means that the generator, and the battery work properly, and charging the battery from the generator is good. If the indicator U is below the specified, the generator is most likely faulty.

Before you think about changing the generator, you need to check how its belt is stretched. Maybe it's just that the belt tension weakened, and the generator itself is working. The resistance of the most common wire connecting the battery with the generator is also checked. Checking the resistance is carried out when the car is turned off, and its indicator should be no more than 20 ohms. When the engine works, resistance is definitely increasing, but not much. 40, maximum, 50 ohms.

In the event of an increase in resistance to several kilomes, try cleaning the contacts to the mass, as well as on the cable. Set everything back and check the service function. If everything works fine, and the level of the charger U is left low, the problem is exactly in the generator, and it needs to be repaired.

Attentive motorist will always check and remove all the indicators necessary to control the battery charge level and its condition. He knows - if I have a car, I perfectly understand what, if you do not follow the battery, it is possible to be in such a situation at any time when it fails at the most inappropriate time.

Instruction

The battery ceases to charge after it reaches a certain voltage value. After the battery is fully charged, all the energy coming into it exceeds its container. To get it, rechargeable battery have to give part of its energy, and recharge occurs. This process is very negative effect on this device, quickly cares him and displays. That is why the accurate charge of the charge is very important.

To date, many are equipped with flower charge indicators. They are located on the top of the device. To understand, in what condition, look at the color of the indicator light bulb. No color says that there is no charge, white color means low level Poiled electrolyte, and green shows the full charge of the battery.

There are repaired and non-processed batteries, which differ in between the ability to access with electrolytes. If the electroblock with the sealed top cover is lit on the white light indicator, you can only throw it away. You can't do anything else with him. And in no case do not dilute the electrolyte with something else, even more so - sulfuric acid.

But for the charge of the repaired battery in this case, it is necessary to pour distilled water. To do this, lift the top of the block, unscrew the can of the can and add water to the required level. After that, it will only be left to wait for sunbathing and disconnecting the battery from the network.

If there is no charge indicator on the power unit, do not charge the battery for more than 16 hours. To save the battery life, the battery is better charged enough than to recharge.

Sources:

• How to determine what battery is charged

The battery charge level is often determined using specially built-in indicators diodes that are reported by their color to one or another information about its condition.

You will need

• - Charger.

Instruction

In order to charge the battery level, pay attention to the indicators specially invented for these purposes. Some devices are special LEDs that are certain to the user of this or that state of the battery. Most often used green, yellow and red colors. Green, that the charge level is maximum or approximate to this, yellow - the average battery level of the device, and the red is below average, or even in some cases the device tries to report on the nearest completion of the work. Often such a system is used by various network chargers.

If your device using batteries have a special strip indicator, view them. It means the number of charged battery compartments. As the device is used, their number decreases. Such a system is relevant for, portable, navigators, tablets, and so on. With their full population during charging, the device can be disconnected from the source of electricity supply.

All articles

One of important elements Auto requiring verification is a battery, or AKB. The serviceability of the battery and its performance is very important, since it is thanks to batteries that the car will be used, and the electricity systems are powered by all systems: the headlights of the Middle and far Light, media system and much more.

If you have already met with the seller and want to be sure that in the case of buying a car you will not have to be the first thing to break the head to run to the store for the new Akb, the cost of which is usually more than 10 thousand rubles, then you have several ways to check the battery By car:

• Inspect the battery outwardly;
• Measure the voltage on the battery multimeter;
• Check the battery with a load fork;
• Check the electrolyte level in the battery.

Every question we will consider in detail, but we immediately note that the fourth version with checking the level of electrolyte is available only for serviced batteries. But anyway, there are a number of methods, how to check the car battery for performance, and in this article we will look at them.

You met with the seller and have already walked around a car in a circle, saw what it was clean and beautiful. It's time to look under the hood, you raise the lid and see the usual content of the windscarette, the engine and numerous systems that support the operation of the car.

In most cases here, in open space, It is also ankb - a rectangular box with an electrolyte inside, to which two wires are suitable - the positive and minus. These wires go to the distributor block, and the entire machine and all its systems feeds from this electrolyte massive "battery" of electricity.

Even if you do not understand anything in cars and went on an independent inspection rather as part of compliance with the formality, you can still appearance Akb determine what state it is.

With external inspection, attention should be paid to the most part of the integrity of the elements, and the battery and contacts are clean. There are a number of external factors, the presence of which immediately reports replacement Or at least cleaning the battery.

• Dirt on contacts. In order for the battery to work, both contacts suitable for its wiring must be clean. In case the contacts are dirty, it suggests that the battery is not new, and the dirt will interfere with the correct operation of contacts.
• The oxidation of the conclusions - the unarmed eye can be seen on the terminals of the battery, the extraneous tax is oxidation, which in most cases is associated with the leakage of the electrolyte. The electrolyte is an acid that is inside the battery. If it is spilled and falls into contacts, it may lead to a deterioration in the battery life and a decrease in contact area.
• Cracks on the housing - the battery itself should be integer. Plastic box containing electrolyte should not be damaged. It is also clearly visible without additional equipment And with good lighting.
• Dirt, dust, elevation of electrolyte - all this is eliminated by a rag, and you can not allow the car to go with a dirty battery, since the conductive tax will contribute to its quick discharge and deterioration of work.

In addition to external inspection, you can run the car engine. Especially indicative will be the launch of "on the cold" if the engine did not start for a long time, but on the street, cold. If the car started easily - the battery is in order, if she did not start or started hard, the headlights shine dimly, and dashboard Also not brightly highlighted, the battery should be changed. Or, at least, check it with appliances, which we will tell me further.

Voltage measurement multimeter

If you do not want to check the state of the battery "on the eye", or simply want to have accurate results in the hands in numerical expression, you will need such a device as a multimeter.

So, how to check the car battery by multimeter: the device itself has two probe, one of which is red, and the other is black. In order to measure the battery voltage, you need to translate the multimeter to the measurement mode and lean the red probe to the "positive" conclusion, and the black dipstick, respectively, to the "minus".

The procedure is carried out at the outputs of the battery without load. In the event that the battery is charged, the result on the device will be about 12.6-12.9 volts. This is a normal stress that should be on a fully charged battery. If you have frightened with the colors of the probe, the figure will be the same, just appear with a minus sign.

If the motor is running, then the multimeter can also be checked the battery operation, but in this case the presence of its operation will be checked together with the generator, as well as the health of the voltage regulator. When the motor works, the indicators must be slightly higher - from 13 to 14 volts. If the indicator below, for the battery it will mean charging problems, and in case the indicator above - the water electrolysis process will begin.

There is a method as a voltage determine the degree of battery discharge. The voltage is 12.5 - it says that the battery is charged by 90%, the voltage is 12.1 - by 50%, and 12 - by 10 percent. Although the method and approximate, but verified.

To measure the device is also preferably "on the cold", since the newly worked car can give higher values \u200b\u200band mislead. The multimeter checks the degree of charge, but does not give comprehensive information about its performance. To do this, it is better to apply the load fork.

Load plug - the tool is very accurate, but it is rarely found in the "manual" handling, as it is used mainly to a hundred. The charm of this method of verification is that thanks to it will be known for absolutely accurate result.

The load plug works similar to the multimeter manner: it also connects to the battery terminals, but gives a short circuit current. As we said, without load, the indicator should approach 13 volts. The load plug simulates the operation of the starter, which is why the voltage at the time of use "sends".

The fall must be no more than 9 volts. Otherwise, this will mean that the battery is greatly discharged. After removing the load, the indicator "rolls back" to the original value. If under load voltage "sends" to 5, or even up to 3 volts, this means that the battery will not be able to start the car engine.

Extremely important note: the load plug supplies a voltage of about 200 amps per battery, and it is not recommended to use it at low temperatures. The ideal conditions for the "field" use of this unit is the temperature of + 20-25 degrees Celsius.

In case the voltage is on a cold battery, there is a risk of hard to discharge.

Another convenient and reliable method, which, however, is suitable only for checking the servants serviced, it is checking the electrolyte level. The method is a bit more complicated than the previous ones, but it gives a good idea of \u200b\u200bthe status of the battery and will tell that he is inside.

First remove the battery and completely clean it from dirt. Recall that it is better to do with rags, dirt and minor corrosion can also be considered using an ammonia-based brake wash.

Next you need to open two corks of the fuel holes. They need to be easily pushed and unscrew, six fuel holes are hidden under them. The electrolyte level in them is checked on the eye, it can be seen when flashlight light. If everywhere the same fluid level is all right if somewhere the liquid does not cover the plate, you need to add distilled water.

In general, this procedure should be carried out regularly, since with each charging of the battery electrolyte in small fractions decomposes into hydrogen and oxygen. In the absence of regular service, the battery simply fails.

The norm is considered to be the level exceeding the height of the plates about one centimeter, or below the neck of the fuel hole for three millimeters. If necessary, to the serviced battery it is worth adding distilled water, but we once again remind: if there is a "non-liable" mark on the battery, or the manufacturers of this specific model Akb is not recommended to top up distilled water into it, you can only resort to previous test methods and, if necessary, replace the battery.

Knowledge, how to properly check the battery, it is important when buying a car with mileage. Often the sellers of cars want to save on trifles, including selling a car with a discharged battery, which can lead to negative consequences for the new owner. Always be alert and check in reality what the seller talks about the health of his car.

And do not forget to check the history of the car before buying. You can do this using the Avtocode online service on VIN or state. number. The system checks the car by more than 12 official bases: traffic police, EAOSTO, RSA, taxi registries and banks, FTS, FCS and others. From the report you will learn: real mileagewhether there are limitations of the traffic police, the CTP, the customs history, the history of fines, participation in the accident and many other important information.

If you do not have an imposition to go to the inspection or you just doubt your experience, book an autocode checkout service. The expert will arrive at the inspection and will hold comprehensive diagnosis Car without leaving no doubt about your choice of vehicles.

How to check the battery car for performance?

In this article, tell how to check the car battery for performance using a multimeter and load plugWhat methods for this exist.

Check battery auto using a multimeter

For this multimeter is required - the device for measuring the voltage. If you don't have it, you can ask for friends or buy in the store. The device itself is not expensive, and if you have repeatedly spend repair work With electrical equipment, it is useful not at times.

Do not rely on the stress of the battery using on-board computer Machines, because They can be wrong. This is because the voltmeter data is connected directly to the battery, which means that the losses are possible. Therefore, the voltage on them can be shown less than on the battery itself.

Checking the battery when the engine running

We measure the voltage first on the engine manner. Normal tension should show from 13.5 to 14.0 V.

If the battery voltage with the engine running will be greater than 14.2 V - this indicates a low battery charging and that the generator works in reinforced mode to charge the battery. This happens not always, for example, in winter it is possible an increased voltage, because The battery could be discharged a little overnight due to cold temperatures, or electronics determines the air temperature and gives more charge to the battery.

In the increased voltage on the battery there is nothing wrong. If everything is fine with the electrical equipment, then after 5-10 minutes the electronics sacrifs the voltage itself to normal: 13.5-14.0 V. If this does not occur, and the voltage is gradually not reset to the optimal value, it may turn into a battery reload. It will always work with a maximum return and possibly discharge of electrolyte.

If the engine is running the voltage less than 13.0-13.4 V - It says that the battery does not fully charge. It is not necessary to immediately run in the auto service immediately, to start, the measurement should occur with all the users turned off, which means turn off the music, headlights, heating, air conditioning and all power consumption instruments.

What is the voltage on the battery when measuring a multimeter? For normal work Machine electronics It must be between 13.5 to 14. If below, it says that the car generator does not work. Especially when the voltage at the engine running and the consumers turned off less than 13.0 V.

Also possible low voltageIf the battery contacts oxidized, so before going to the auto service, check all the contacts and read them with a skin.

How else to check the battery and generator operation, respectively? There is one way. For example, when the engine running and turned off sources of consumption, the voltage on the battery is 13.6. Now turn on the Middle Light. The battery voltage should slightly fall - at 0.1-0.2 V. Next, we first include music in the car, then air conditioning and then other consumers. We do everything gradually and with each inclusion of consumers the voltage on the battery should fall slightly.

If the voltage after the power supply of the car's power consumption drops significantly, this suggests that the generator may not work in full powerIt was possible to wear the generator brushes.

Even with all the included consumers, the voltage on the battery of the machine should not fall below 12.8-13.0 V. If it is less - then the battery is simply discharged, and maybe it requires replacement and purchase of a new battery, and how to check it out below.

Checking the battery when not working engine

Check the battery voltage at disabled Engine using a multimeter. If the voltage at its conclusions is less than 11.8-12.0, then the battery is discharged, the car may not get started, and it will have to be seen from another car.

Normal voltage on the battery with a non-working engine should be from about 12.5 to 13.0 V.

There is an old and very simple technique of car enthusiasts, to find out the voltage to find out the battery level level. So, the voltage is 12.9 - it says that the battery is charged by 90%, the voltage is 12.5 - by 50%, and 12.1 - by 10 percent. Here is such an approximate method of measuring the battery charge level, but very effective, which is confirmed on its own experience.

There is one nuance when you measure the voltage on the battery when the engine is not working. If the measurement passes immediately after the engine was muffled, then perhaps one reading, and if the next morning it will already be another voltage. It is best to measure the battery voltage before traveling.

The battery charge level speaks of his ability to keep tension over some days. If the battery is fully charged, even if you did not go for more than a week, the voltage does not much fall. Otherwise, if the car's battery is discharged - the voltage will fall quickly, and the battery charge will last no longer.

We told about a simple method of measuring the voltage on the battery, but it is very approximate, although quite acting. If you want to learn more about the performance of the battery, then talk about it in the next section.

Checking the battery with a loader

This method of checking the battery using the load plug is very an effective way Car battery performance checks. It is according to its results can be declared, a battery is charged or not.

How to check battery charge? To do this, connect the load plug, observing the polarity. The joining time should not exceed 5 seconds. At the beginning of the stress of 12-13.0 V. At the end of the fifth second, the voltage should be more than 10 volts. Such a battery is considered charged and able to work under load.

If, when checking the load plug, the voltage drops below 9 volts, the battery is considered weak and unreliable. In this case, you will have to think about buying a new one (how to choose a battery for a car).

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What are there any ways to check car battery on performance

When operating the car, it is periodically necessary to pay attention to the maintenance of some of its nodes, including the battery. Many car owners know about it, but often just do not understand how to check the car battery. For this, there are a number of methods that we will talk below. To competently check the battery for performance, such devices are required as a multimeter and load plug. If you are constantly going to serve the battery yourself, then it is better to purchase them. In stores these devices can be found at an affordable price.

When checking the car battery, it is worth starting from its external inspection. This is a simple, but important stage. It detects contamination of the surface of the battery, the oxidation of the conclusions, damage to the housing integrity. An external ankb inspection should be carried out regularly, since its purity also affects performance. It can be done every time you look under the hood. Wake up the battery look does not take much time.

Pay attention to the connections of terminals with currents. With a bad connection there is active oxidation. The battery case is checked visually for cracks.

The surface of the battery must be clean. Dirt, dust, electrolyte, butter need to be removed by rag. Otherwise, the rechargeable battery will constantly lose charge through this conductive tax and performance will deteriorate.

Of course, it is worth checking the accumulation of battery mount on landing place. Now let's talk about how to check the car battery using various devices.

Checking the battery multimeter

Multimeter can measure voltage on the battery. To estimate the charge of the battery, the voltage is measured on the outputs of the battery without load. To do this, the multimeter is installed in the voltage measurement mode. Then the diploma is then touching a positive output, and black - negative output. If the battery is fully charged, the voltage will be 12.6─12,9 volt. Nothing terrible if the probe attached the opposite. In this case, the multimeter simply will show the voltage with the minus sign.

Some readers ask how to check the car battery on the engine running. The fact is that the battery is not checked on the engine, and the presence of charging on it from the generator and the serviceability of the voltage regulator.

The voltage at the conclusions of the battery when the engine running should lie in the range of 12.9─13.4 volts. If less, then the battery will be badly charged, and if more ─ is activated by the water electrolysis process.

It is worth noting that with the help of a multimeter, you can only estimate the degree of battery charge. To estimate its performance, you need to know how to check the car battery with a load fork.

Checking the battery loading fork

The load plug is a device that creates a load on an AKB, similar to the one that the battery is experiencing when the engine is started by car. Such an inspection of the car battery allows you to objectively assess its condition and performance. This device includes a voltmeter, load resistance and terminals.

To check, connect the load plug terminals to the battery outputs. The voltmeter should show a voltage from 12.6 to 12.9 volts. If it is less than this value, the battery needs to be charged completely. Then a load of 5 seconds is served. After this time, the output voltage should not fall below 10.2 volts. If the voltage ranges below 9 volts, the battery is already very worn. If the value is less than 9 volts, then this battery is definitely time to change.

Now you know how to check the car battery for performance with the help of a loader. There is another interesting point here. We considered the case when on a charged battery there is a regular voltage of 12.6─12,9 volt. And what if the battery voltage is less? In most cases, this suggests that one or more cans failed. Most often, this is caused by a short circuit of the varied plates, which leads to loss of performance.

How to check the car battery for closure? This can be done with the help of the same multimeter. Connect the device's probe to the conclusions of the charged battery and see the testimony. If the voltage is 10.4─10.7 volts, one of the cans has failed.

The element (or bank) of the battery in the charged state has a voltage of 2.1 volts. So, according to the indications of the multimeter, you can immediately determine how many elements failed. To determine the defective jar, you need to measure the density of the electrolytes in all. In a closed bank, the density will differ sharply from the rest, and when charging it will not be gas emissions (as they call boil).
Additionally, you can read the material about the specified link.

Checking the real capacity of the battery

As is known, the rated capacity of the battery is generally determined by its constructive features and production technology. The value of the nominal capacity manufacturer always affects the battery label. But the real value of the container during operation is constantly changing in a smaller side. Naturally, the power and efficiency of the battery is falling. How to check the car battery according to the actual value of its capacitance?

For this, the following type scheme is collected.

Resistance in this scheme is calculated by the formula:

I - discharge current.

The discharge current is chosen depending on which the duration of the discharge cycle is. It is usually 10 or 20 hours.