How to judge the quality of a car battery, how to judge the quality of a car battery?

1. When the vehicle is turned on, the car radio does not change in any way, until the vehicle is started, the radio is working normally, and the sound quality has not changed. Then it means that the vehicle's battery is in good condition and has sufficient power.

2. If the sound of the radio changes when starting the vehicle, it becomes smaller or noisy instantly, indicating that the battery power of the vehicle is not very sufficient, and the power needs to be replenished.

3. If the display screen of the radio will be black when starting the vehicle, just like the power is off, and the radio can return to normal after the vehicle starts, then the battery at this time has signs of reduced capacity, that is to say, the working state of the battery has deteriorated and cannot be recovered. At this time, the actual capacity of the battery is already lower than the design capacity, and it is not recoverable. Then you need to be prepared at this time, maybe your battery is almost dead.

The only solution is to replace the battery with a new one.

Use a multimeter ohm to measure the two poles of the battery: when the car is not on, it should be a few volts at 12.0 volts, and the car will not be able to hit if it is less than 10 volts; When the car is in the car, it should reach about 14 volts, if it is still 12 volts or lower, it means that the generator does not generate electricity! You have to check the generator belt, the inside of the generator....

Owner's friend* Hello, you can go to the repair shop and use a discharge meter to measure the capacity of the battery. 2.Measure the voltage with a multimeter.

3.Measure electrolyte density. 4.

Turn on the headlights of the car, start the engine, and observe whether the headlights are obviously dim at the moment of starting, if the headlights are obviously dimmed, it means that the battery is losing power or aging.

How to judge the quality of the car battery:See if the battery is bulging.

Look at the surface color of the battery.

Check the battery voltage.

When the battery bulges, most of the reason is that the internal pressure of the battery rises at high temperature, and the pressure limiting valve of the battery is automatically opened under pressure. Once the pressure limiting valve is opened, it accelerates the rate of water loss of the battery. The battery loses too much water, the activity of the battery decreases, and the shell is prone to heating, bulging, deformation and other problems during charging, that is, the phenomenon of battery charging.

Attention to the use of car batteries:

Before the failure of the car battery, there will be no obvious early symptoms, and the consequences will directly lead to the engine starting unsmoothly or even unable to start, and the battery must be replaced with a new one to solve.

Generally, the design life of batteries in regular enterprises is 24-36 months. However, the actual life of the battery will vary greatly depending on the use case. For example, many of the batteries of new family cars can be used for 3 or 4 years, and some can be used for 2-3 years, such as some high-end cars, and there are more electronic systems in the car.

The methods for judging the quality of automobile batteries are: passing the inspection of the electrolyte level height of automobile batteries; Check the degree of discharge by electrolyte density; Through the battery discharge degree check and other methods.

The method of judging the quality of the car battery is as follows:

1. Pass the inspection of the electrolyte level height of the automobile battery.

The level of the electrolyte can be measured with a glass tube. Normally, the electrolyte level should be 10 15mm higher than the plates. The new battery can observe the liquid level by means of a height indicator line on the side.

If the electrolyte is insufficient and it is known that the drop in the liquid level is due to the electrolyte spilling, distilled water should be added.

2. Check the degree of discharge by the density of the electrolyte.

The degree of discharge can be roughly estimated by measuring the density of the electrolyte. Typically, every decrease in the density of the electrolyte is equivalent to a 6% discharge of the battery. Note: The measured electrolyte density needs to be converted to a density value of 25 for judgment.

3. Judge the quality of the battery by checking the discharge degree of the battery.

Static electromotive force check to judge the quality of the battery.

If the battery has just been charged or the vehicle has just been driven, the high beam should be turned on for 30s to eliminate the "surface" phenomenon, and then turn off the headlights to cut off all loads. If the rated voltage is 12V and the measured voltage is less than 12V, it means that the battery is overdischarged; If it is detected, it means that it is partially discharged; If it is higher than that, the battery is fully charged.

The load test checks to determine the quality of the battery.

The best test method for the performance of lead-acid batteries is load test, which requires the battery under test to store at least 75% of the charge, if the density of the electrolyte is lower than that, the static electromotive force measured by the multimeter is not enough, and then the test is carried out.

The method of judging the quality of the car battery: 1. Look at the observation port: The color that can be seen at the observation port is generally divided into three types:

Green, black and white, green means sufficient power, black means slight power loss, white represents scrap and needs to be replaced; 2. Voltage measurement: measure the voltage of the battery through the battery measuring instrument or multimeter; 3. Judging from the appearance: observe whether the appearance is deformed, protruding, leaking, ruptured and exploded, scorched, and whether there is oxide exudation at the screw connection.

Precautions for using batteries: 1. Do not use the electronic equipment in the car for a long time without starting the engine, which will reduce the service life of the battery; 2. If you don't drive for a long time, you need to disconnect the negative pole of the battery, which can prevent the battery from losing power.

Views on the quality of the car battery: 1. Green or blue means that the battery is in good condition; 2. Black or red means that the battery needs to be charged; 3. Self-color indicates that the battery needs to be replaced: when the electrolyte level is low, only gray and white can be seen at this time, which means that the battery is damaged.

If the ignition cannot be carried out after the key is inserted, and the vehicle has not been placed or discharged for a long time, it can be initially judged that the battery aging is more serious and the battery needs to be replaced.

After the car is running normally for a period of time, if it is not used in the near future, the car can be discharged tested, the key is turned on to the circuit, and then the headlights of the car are turned on, if the headlights are turned on one or two days after they are extinguished, the battery aging can be judged; During the start of the car, check the electronic equipment in the car, such as the radio, whether the sound will be loud and small, if the sound is loud and small, you can judge that the battery output is unstable.

Car battery precautions.

For newbies, turning off the flame is a common occurrence. If you fail the first time, don't rush to start again and again. Continuous starting of the motor will definitely cause the battery to be damaged by over-discharging. Therefore, the time interval between reactivation should be more than 5 seconds.

Some car owners are obsessed with ** and often install high-power stereos. Whether it's while driving, or idling and waiting for someone, the speaker must never stop. Listening to high-power audio when the vehicle is not started will bring a very high load to the battery, and the damage to the battery is very serious.

How to test the quality of a car's battery?

2. If the no-load battery voltage is normal, plus the load, you can open the electric vehicle door, put the rear wheel overhead, add a certain resistance to the rear wheel, and screw the accelerator switch;

3. At this time, measure the battery voltage, if you find that the battery voltage drops, but the drop is not much, and the vehicle accelerates strongly, it means that the battery is basically intact;

4. If the battery voltage drops very much at this time, which is seriously lower than the nominal lower limit voltage, and the vehicle accelerates weakly, it means that the battery has aged and the capacity is insufficient.

The above methods can only be roughly judged, and accurate judgment needs to be measured with a battery capacity meter.

Hope it helps.

Try again after fully charging, if it doesn't work, only change the battery, the battery is fine in summer, and it needs to be charged once in 2 or 3 months in winter, which is very expensive in winter.

The voltage of the battery (battery) should be above 9V when it is ignited! The battery is replaced every 2 years!

According to your problem, the battery is broken, it's time to replace it!

1.The voltage of the battery (battery) should be above 9V when it is ignited!

2.Detect how much V is the output voltage of the charging part of the car, or whether the battery voltage can be reached after the car is driven for a period of time.

3.I go to the place where I can charge it and charge the battery directly. It depends on how it goes4Professional testing! Accurately charge and discharge the battery completely, and it can work normally when it reaches half of its capacity!

The methods to judge the quality of the car battery are: check the electrolyte level of the car battery; Check the degree of discharge with electrolyte density; Check the degree of discharge of the battery, etc.

The method of judging the car battery is as follows:

1.Passed the electrolyte level detection of automobile batteries.

The level of the electrolyte can be measured with a glass tube. Normally, the electrolyte level should be 10-15 mm higher than the plates. The new battery can be observed at the level by means of a side height indicator line.

Distilled water should be added when the electrolyte is insufficient and it is known that the drop in liquid level is caused by electrolyte splashing.

2.Check the degree of discharge by electrolyte density;

The degree of discharge can be roughly estimated by measuring the density of the electrolyte. Typically, every gram square centimeter decrease in electrolyte density is equivalent to 6% of the battery discharge. Note: The measured electrolyte density needs to be converted to a density value of 25 to be judged.

3.Judge the quality of the battery by checking the degree of discharge of the battery.

Check the static electromotive force, and judge the quality of the battery.

If the battery has just been charged or the vehicle has just been driven, turn on the high beams for 30s to eliminate the "surface" phenomenon, and then turn off the headlights to cut off all loads. If the rated electric punch voltage is 12V, it is less than 12V, indicating that the battery is over-discharged; If measured, it indicates partial discharge; Above volts indicates that the battery is fully charged.

Check the load test to determine whether the battery is good or bad.

The best way to test the performance of a lead-acid battery is a load test, which requires the battery under test to be able to store at least 75% of its charge. If the density of the electrolyte is less than gram square centimeter, the electrostatic electromotive force measured by the multimeter is less than volts, and it should be fully charged before testing.

Millions of car purchase subsidies.

Cars are already a must-have tool for everyone to get around. Of course, automotive knowledge is essential. In order to make it easier for everyone to understand these knowledge, today Bian Xiao will introduce to you how to judge the quality of car batteries.

Interested friends can learn about it, it may be helpful to you.

Methods for judging the quality of automotive batteries include: detecting the level of electrolytes in automotive batteries; The degree of discharge is detected by the density of the electrolyte; Pass the test of the degree of discharge of the battery. Here's how to judge whether a car battery is good or bad:

1。The level of the electrolyte dome in the automobile battery can be measured with a glass tube. Under normal circumstances, the level of the electrolyte should be 10-15 mm higher than the plates.

The new battery can be observed at the level through the height indicator line on the side. Distilled water should be added when the electrolyte is insufficient and it is known that the drop in liquid level is caused by electrolyte splashing. 2.

Use the electrolyte density bridge cavity to measure the degree of discharge. By measuring the electrolyte density, it is possible to roughly estimate the degree of discharge. In general, the electrolyte density decreases, which is equivalent to 6% of the battery discharge.

Note: The measured electrolyte density needs to be converted to a density value of 25 before it can be judged. 3.

The quality of the battery is judged by detecting the degree of discharge of the battery, and the quality of the battery is judged by detecting the electrostatic electromotive force. If you have just charged the battery or just started a car, turn on the high beams for 30s to eliminate the "surface layer" phenomenon, then turn off the headlights to cut off all loads. Measure the open-circuit electromotive force of the battery with a multimeter as shown.

If the rated voltage is 12V and the measured voltage is less than 12V, it means that the battery is over-discharged; If measured, it indicates partial discharge; Higher, the battery is sufficient. The best test method for judging the performance of a lead-acid battery is a load test, which requires that the battery under test should store at least 75% of its charge. If the electrolyte density is lower than and the electrostatic electromotive force measured with the multimeter is less, it should be fully charged before testing.

There are several ways to judge the quality of car batteries: 1. At present, more than 80% of maintenance-free batteries are equipped with power observation ports. There are three colors that can generally be seen at the entrance of the viewing tour:

Green, black and white. Green means that the power is sufficient, black means that there is a slight loss of electricity, and white means that it is scrapped and needs to be replaced. For details, please refer to the label tips on the battery.

2. Measure the voltage of the battery through the battery measuring instrument or multimeter. Under normal circumstances, the no-load voltage of the battery is about 13 volts, and the full-load voltage is generally not lower than 12 volts, and the starting voltage should not be lower than volts. If the battery voltage is low, the vehicle may be difficult to start or not start.

3. Observe whether there is obvious expansion and deformation or bulging on both sides of the battery. 4. Observe whether there are some white or green powder-like objects around the head of the battery pile, which are the oxides of the battery, or the new batteries generally will not appear easily, once these oxides appear, it means that the performance of the battery has begun to have problems.

If the multimeter wants to measure the DC power supply 12V, it should be placed on the DC 20V block, and the voltage is measured with a numerical multimeter.

If you don't know the level of the measured voltage, you can use a multimeter to adjust to the maximum gear, such as 1000V, and then adjust it to the most accurate front vertical gear according to the approximate value of the measured voltage.

The service life of the car battery is generally about three years, and some car owners may need to replace it in two years because of improper maintenance. Therefore, when the owner parks the vehicle for a long time, it is best to turn off the power to the battery.

The negative wire can be removed directly, which can avoid static leakage of the battery due to long-term non-use. If the battery is too low, it will also cause some damage to the battery if it is not charged in time.