How to check the power supply of a car s battery?

The capacity detection methods of automobile batteries include: voltage block load detection of voltmeter or multimeter, hydrometer capacity detection method, and capacity detection method with a special battery detector.

First, use the voltmeter and load to detect the battery storage capacity.

It is difficult to detect the storage capacity of the battery, and only use the voltage block of the voltmeter or multimeter without load to check whether the storage power of the battery is sufficient. When the voltage is measured alone, the current consumption is very small, so it will not produce a large voltage drop inside the battery, so the display voltage is not low, but if a considerable load is added, such as turning on the headlights (load current 10 15A) and honking (load current 6 12A), the battery will dim the light and the horn is hoarse, thus showing insufficient power storage.

The correct and reliable detection method is to turn on the starter on the car to detect the battery voltage, and the steps are as follows: at the normal temperature of the engine, connect a voltmeter to the positive and negative poles of the battery, and pull out the injector wire, so that the engine can not start. Start the engine to run continuously for 5 10 seconds, and observe the degree of the voltmeter at the same time, when the starter and the line are well connected, the battery voltage of 12V is at or above, indicating that the battery is in good technical condition; If the voltage is lower than the above value, it means that the battery is in a state of power loss and the storage power is insufficient.

2. Use a hydrometer to detect the storage capacity of the battery.

A hydrometer is also a common method to check the storage capacity of a battery. Generally, the standard specific gravity of the electrolyte in a fully charged battery at 20 is that; If the specific gravity of the electrolyte in the battery is less than the above value at 20, it is greater than the battery storage capacity is insufficient and needs to be charged; If the specific gravity of the electrolyte is or less at 20 hours, the battery is completely discharged or damaged. According to this principle, the specific gravity of the battery electrolyte can be measured by using a hydrometer to know the storage capacity of the battery, and the condition of the battery can be further judged.

3. Use a battery tester to detect the storage capacity of the battery.

In daily maintenance and repair, it is necessary to use a battery tester to quickly and accurately detect how much battery power is stored. When using, connect the battery tester to the battery for 10 15 seconds, and the voltage is kept at, indicating that the capacity is sufficient and the battery is fault-free; The voltage is kept at, indicating that the capacity is insufficient and the battery is fault-free; If the voltage drops below the battery, it means that the capacity is seriously insufficient or the battery is faulty. The above is just a simple battery detector, which can only measure the battery voltage in the state of high-current discharge, and roughly judge the storage capacity of the battery.

At present, the most advanced battery tester can accurately measure the cold start current (CCA) in addition to starting and discharging.

Don't look at this small battery, because it causes vehicle accidents, it is too much, and it is often easy to be ignored by us, just every time after ignoring, always drop the chain at the critical moment, stop there and do not walk in a hurry, there is really a restlessness that wants to smash the car, and I don't want to encounter such a nerve-wracking thing again, so check it well.

The battery is most worried about the lack of power, and often this solar term is just the battery accident, after the spring and summer high temperature, wind and sand weather, the battery electrode wiring is easy to oxidize and peel, so that the leakage is small, it is worried that the line will burn out, and the battery will be scrapped.

When it is found that the surface of the battery joint is green due to oxidation, the surrounding debris is cleaned, and the surrounding stains are removed, and the natural wind is dry, and then sprayed with a special protective oxidant to ensure the normal power supply of the battery and the safe driving of the vehicle.

Another loophole of the battery is that the interface is easy to loosen after a long time, resulting in poor contact, and the power will be obviously insufficient.

Daily maintenance work is also as important, do not ignore his maintenance because of small, do not smoke 5s every time you start, to ignite in the shortest and fastest time, if the vehicle is stagnant for a long time and does not use, it is recommended to take down the electromagnetic storage. When replacing, don't blindly consider the large power, and ignore the power of the battery itself, which will cause damage to the battery again.

First of all, we must understand that most of the voltage of car batteries is around 12V, and it will only be increased to between 13-14V after the engine starts, which is the normal voltage value. We can use a voltage measuring instrument or multimeter to measure the voltage of the battery, and now some car charging adapters also have a screen voltage value, and we can also observe the voltage size. If the engine is not started, the voltage is less than 12V or lower than 13V after starting, which means that the battery power consumption is more serious.

Judging the condition of the battery by the voltage of the battery is still a common method.

Most batteries will have an observation opening, which is usually located directly in front of the battery. The observation port is generally composed of three colors: black, yellow, and green.

Black means that it is about to be scrapped and needs to be replaced immediately, yellow means that it has lost power, and green means that it is in normal use and has sufficient power.

Determine whether there is a loss of power, determine whether the battery pile head connection is firm and reliable, whether the battery falls off and breaks, whether the tie wire is loose, corrosion, all of these will make the starter abnormal, the battery power supply is insufficient, the horn does not sound, the light is not on, sometimes the light is bright but has been turned on as soon as the starter is extinguished, this situation can be solved by adjusting the power cord, scraping out the rust, and fastening the iron wire.

How to check the battery on the car:1. Check whether there is electrolyte overflow on the surface of the battery tank.

2. Remove the dust and mud on the battery cap, remove the electrolyte on the battery cap and the oxide on the column and battery cable joint.

3. Check whether the installation of the battery on the car is firm, and whether the cable joint and pole connection are tight.

4. Check whether the vents on the lid of the liquid filling hole and the screw plug are unblocked.

5. Check and adjust the liquid level height of the electrolyte.

Types of car batteries:1. AGM battery (large-capacity closed battery), the principle of this battery is to put the large capacity into a small space, so that it can fully meet the requirements of the start-stop system for the battery. This kind of battery is very good and expensive, and at the same time, it also has a disadvantage that it is not very resistant to high temperatures.

2. The ISS battery developed by the Japanese battery manufacturer, the appearance of this battery is the same as the current car battery, and the raw material is also lead-calcium alloy, but the internal technology is very different from the ordinary battery, it is essentially designed in accordance with the characteristics of the start-stop system.

Limited equipment at home. There are special battery detectors, handheld.

With the rapid development of science and technology and the rapid improvement of China's economy, China's per capita economic capacity will also be greatly improved. After the economic ability is improved, everyone's living standard will naturally improve, and the car will enter every household as a standard accessory. So how do you check your car's battery capacity?

Let's give Dabi Zao a brief introduction to our car friends!

Introduction to Automotive Battery Charging Detection: Introduction.

2. Electrolyte density estimation method, most of the battery electrolyte density is around (the electrolyte density distribution at different temperatures is the same, and it needs to be quietly converted to 25 degrees Celsius when measuring) Practical experience shows that every decrease in electrolyte density is equivalent to 6% of battery discharge. Or, roughly speaking, for every electrolyte density shorter than the standard electrolyte density, the battery is discharged by 25%.

The above is a brief introduction of how to check the battery level of a car, and a brief introduction of how to check the battery level of a car. The car master hand-to-hand transport introduced three aspects to the friend. First of all, I would like to briefly introduce the car battery to my friend.

Then, two detection methods for automobile batteries, namely the discharge fork measurement method and the electrolyte density estimation method, are briefly introduced. So, after reading the introduction of the car, do friends basically understand it?

Millions of car purchase subsidies.

How do I test my car's battery level? Let us introduce you to it below! Let me introduce you from different aspects.

1. Appearance inspection of the battery.

First of all, batteries are generally more regular than Ponson. If you notice significant deformation or bulge on both sides of the battery, it must be inspected for replacement. Also, observe the position of the battery connection pile.

If there are some white or green powders around the pile head, it means that there is a problem with the battery, because these powders are oxides in the battery, which is generally not the case with newer or better quality batteries. 2. Observation mouth inspection.

More than 80% of batteries will have an observation opening, usually a crack directly above the battery. Three colors can be seen through the observation port: green, yellow, and black.

Green means that the battery is sufficient, yellow means that the battery is slightly lost, and black means that the express is useless and needs to be replaced. But what I want to say here is that the information about the response of the observation port can only be used as a reference, because many car owners say that the feedback from the observation port is not reliable.

3. Battery voltage detection.

Generally, the voltage of a car battery is around 12V, and it will rise to 13-14V after the car is started. These are normal voltage values. Usually, we can measure the voltage of the battery with a voltage meter or a multimeter.

In addition, now some car charging adapters also have screen voltage values, and we can also observe the voltage. If the voltage of the vehicle is lower than 12V before starting or 13V after starting, it means that the battery is wearing out more. It is still a good way to judge the condition of the battery from the voltage value of the battery.

According to the electrolyte density estimation method, the battery electrolyte density is generally around the limit. Practical experience shows that every decrease in electrolyte density is equivalent to 6% of the battery discharge. Or roughly speaking, for every decrease in electrolyte density, the battery discharges 25% compared to the standard electrolyte density.

That's it for the whole method I introduced on how to detect the battery level of a car. As for the introduction of how to detect the battery level of a car, I have introduced three aspects for you. So, after reading my introduction, do you all know about it?

If your car doesn't start properly or doesn't start at all, then the first thing to check. It's the car battery.

1. In order to move the battery, you first have to untie the terminals of the positive and negative poles. There are generally straps on the batteries, so to untie these straps you will need a half-inch wrench.

2. Once the battery is removed, immediately check how much power is in the battery, and the car does not need to be driven during this period.

3. If the voltage is lower than 11 volts, then it needs to be fully charged on the charger. There is a red and black wire on the charger, the red wire is connected to the positive pole, and the black wire is connected to the negative pole, once the battery is charged, the battery level should be checked again.

4. If your battery passes the assessment, it means that the voltage is not as low as 10 volts during the test, reinstall the battery. But if it doesn't pass the test, you need to buy a new battery and install it.

Ways to check if the car battery has electricity: Obviously, if the ignition switch cannot be activated, the engine will squeak; Open the engine cover and look at the viewing hole of the battery. Green is good, black represents a problem; 2. Check whether the battery of the car has a battery fault lamp and an engine fault lamp on the dashboard; 3. How to check whether the car battery is equipped with group electricity, if there is a voltage prompt in the car, it will prompt that the voltage is abnormal.

When the engine is turned off, be sure to turn off the headlights, stereo and other electrical equipment in the car. Most battery power loss is caused by the headlights not turning off after the ignition is turned off. The lifespan of a car battery is generally around 4 years.

When the service life of the car imitation orange battery reaches 4 years, it should be checked in time. Some of the electrical appliances in the car need to be plugged in with a lighter. It's a good idea to unplug the ruler when you get out of the car.

If you don't drive for a long time, it's best to unplug the negative end of the battery.

The battery level can be viewed through the electric eye. The main function of the electric eye of the battery is to allow the user of the battery to intuitively see the storage state of the battery. There are three main states:

The color of the battery eye may be different from different manufacturers). Green or blue indicates good condition; Black or red indicates that it needs to be charged; White indicates that the battery needs to be replaced. The correct and reliable fuel detection method is to turn on the starter on the car to detect the battery voltage, and the steps are as follows:

At the normal temperature of the engine, connect a voltmeter to the positive and negative poles of the battery, and pull out the injector wires to make the engine unable to start. Start the engine to run continuously for 5 10 seconds, and observe the degree of the voltmeter at the same time, when the starter and the line are well connected, the battery voltage of 12V is at or above, indicating that the battery is in good technical condition; If the voltage is lower than the above value, it means that the battery is in a state of power loss and the storage power is insufficient.