How to tell if the battery power of the car is sufficient?

1. Check the battery's battery level indicator (also known as the charging indicator). When the battery indicator shows green, it means that the battery is fully charged and the battery is in good condition; When the battery indicator shows black, it means that the battery is low and needs to be charged; When the battery indicator shows colorless or light yellow, it means that the battery is basically used up, and the battery at this time is difficult to recover even if it is recharged, and this battery needs to be replaced.

2. Measure the quiescent voltage of the battery. Car batteries.

The nominal voltage is 12V, and the actual voltage is a bit higher than that. In the case that the engine does not start, use a multimeter.

Measure the voltage between the positive and negative electrodes should be in between. If the measured voltage is lower, it means that the battery is running out of power; If the measured voltage is lower, the battery is almost completely exhausted.

3. Measure the dynamic voltage of the battery. Connect the red and black hands of the multimeter to the positive and negative poles of the battery, then start the engine and observe the readings of the multimeter. If the voltage is reduced to below 9V, it means that the battery is insufficient, or can not store electricity, and generally such a battery needs to be repaired or replaced directly.

4. The engine rotates slowly when starting, and the instrument light on the dashboard flashes brightly and dimly, which is either the battery is out of power, or the starting system circuit is in poor contact, and the line resistance is too large. Generally, rust of wire joints is the most common. If this is still the case after the line is processed, it can basically be judged that the battery is losing power.

How much power is left in the car battery can be seen by color. 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 gauge method is to turn on the starter in the car to detect the battery voltage.

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 power 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 technology is in good condition.

Here are a few simple ways to do this:

Press the horn directly, if the horn does not ring as before, it means that the battery is low. You can also turn on the headlights to check, if the light is white, it means that the battery is normal, and if the light is red and dim, it means that the power is insufficient.

In addition, there is a battery fault light on the dashboard, if this light is always on, it means that the battery is about to run out of power and needs to be replaced in time.

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.

1. Use the voltmeter and load to detect the battery storage.

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.

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 the battery detector to detect the battery storage capacity.

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.

The battery level indicator, also known as the electric eye, shows black for charging, green for good, and white for insufficient liquid and needs to be replaced. If the display is black, the battery needs to be replenished, there has been a phenomenon of discharge, the charging amount of the car itself is not enough, only the charger can be used to charge the battery, and it takes 20 hours for the car to start the battery charging.

For example, 12V60Ah charging method: Constant voltage current limiting mode is used for charging, constant voltage current limiting 15A charging for 16 hours, and then 3A constant current charging for 4 hours, a total of 20 hours.

The battery can be judged according to the following phenomena when the battery is fully charged:

1) A large number of bubbles are generated in the battery, which causes the phenomenon of "boiling";

2) The terminal voltage rises to the maximum value and does not rise again within two hours;

3) The electrolyte rises to the highest level and does not rise again within two hours.

Or observe the electric eye, the full power state can be judged from the green color of the electric eye.

The car battery cannot store electricity, which is generally caused by the vulcanization of the battery. If it is a battery that has been used for more than three years, it is recommended to go directly.

Replacement; If it is a battery that has not been used for a long time, the battery cannot be stored after being over-discharged due to some misoperation.

The battery can be repaired by desulfurization and charging.

Judge the power of the battery first.

Whether the sound of the starter is powerful when moving. If it sounds like there is no power, there are two situations, one is that the battery is insufficient, and the other is to maintain the starter, the battery on the dashboard is mainly to see whether the generator is used to generate electricity after the car starts, and when it is bright, it indicates that the generator does not generate electricity, and the generator needs to be maintained, and the power of the battery is generally not seen.

Use a battery tester.

Connect the positive and negative binding posts of the battery detector to the positive and negative ends of the battery, and automatically enter the system to select the model of the battery, such as 34B19, 55B24, 55D26, etc. (marked on the battery) for measurement, and the charging status and health status of the battery can be measured. The charging condition is the power of the battery, and the measured value is the percentage, when it is less than 100%, it can be charged. The health state is the storage capacity of the battery, when the measured value is 0%, it means that the battery life has been exhausted, try to replace the new battery, otherwise even if it can be used temporarily, maybe one day in the middle of the road will not be able to start.

In addition, the battery power can also be judged by listening to the sound of the starter when the engine starts, if it sounds powerless, the engine rotates weakly, it proves that the battery is insufficient (however, except for the starter failure).

1. How to judge that the car battery is insufficient.

A: Generally. To judge the power of the battery, first listen to whether the sound of the starter is powerful when starting.

If it sounds like there is no power, there are two situations, one is that the battery is insufficient, and the other is to maintain the starter, the battery on the dashboard is mainly to see whether the generator is used to generate electricity after the car starts, and when it is bright, it indicates that the generator does not generate electricity, and the generator needs to be maintained, and the power of the battery is generally not seen.

Buy a meter that measures the voltage, you will know it as soon as you measure it, or buy the kind of battery with a power storage indication to know, smell, listen, look, are not allowed, listen to a master like me can only guess a roughly.

Use a multimeter to measure or observe if the headlights are dimmed.

You can see the indicator light on the battery, generally green is a normal red envelope, it is to be charged, and if it is black, it means that it is useless and needs to be replaced. However, it is better to use an ammeter to measure it more accurately.

Summary. 2. It can be judged by the battery current: use a multimeter, adjust to the DC current level, and connect the stylus to the positive and negative poles of the battery, generally when the current value is about 2% of the battery capacity and is stable, it indicates that it is fully charged.

3. It can be judged by the battery voltage: the actual voltage of the 12V battery will be slightly higher, the general no-load voltage is about 13V, and the load voltage is not less than 11V. The multimeter measures the voltage, and when the battery voltage reaches 13V, it indicates that the battery is fully charged.

4. It can be judged by observing the electrolyte: when the electrolyte inside the battery bubbles, it indicates that it is fully charged. If it cannot be directly observed, it can also be identified by listening.

Hello, dear, the way to judge that the car battery is fully charged: 1. It can be judged by the charging time: usually the battery capacity of the family car is about 60ah, and the charging current required is one-tenth of the battery capacity, that is, 6A.

Charging at this current can be fully charged in about 3-5 hours, and if charging with a low current, it will take about 10 hours to fully charge.

2. It can be judged by the battery current: use a multimeter, adjust to the DC current level, and connect the stylus to the positive and negative poles of the battery, generally when the current value is about 2% of the battery capacity and is stable, it indicates that it is fully charged. 3. It can be judged by the battery voltage

The actual voltage of the 12V battery will be slightly higher, generally the no-load voltage is about 13V, and the load voltage is not less than 11V. The multimeter measures the voltage, and when the battery voltage reaches 13V, it indicates that the battery is fully charged. 4. It can be judged by observing the electrolyte

When the electrolyte inside the battery bubbles, it indicates that it is fully charged. If it cannot be directly observed, it can also be identified by listening.

Car batteries. How to see the power of the car The exact amount of the car battery cannot be seen, and the battery can only be judged through some phenomena. To be more precise, it is to judge what state the battery is in.

On the surface of the battery, there is an observation hole (also called an electric eye), and by observing the observation hole of the battery, it is possible to judge what state the battery is currently in.

Green or blue indicates good condition; Black or red indicates that it needs to be charged; White indicates the electrolyte.

insufficient, the battery needs to be replaced.

The color of the observation hole of the battery may be different from different manufacturers, and in general, there will be an explanation on the surface of the battery.

It should be noted that if there has been an over-discharge phenomenon, the charging capacity of the car itself is completely insufficient, because it takes 20 hours to charge the car, so the charger can only be used to charge the battery.

Another way is to use a voltmeter.

Detect the battery voltage. voltage, the electricity has more than 95%; Below, the battery is dead; Below, the battery is scrapped.

Attached voltmeter to detect the battery voltage steps:

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.

Then start the engine and run continuously for 5 10 seconds while observing the power of the voltmeter.

How much is normal for the car battery.

The power of the car battery can generally store up to 1200W of electricity.

In practice, it should be judged according to the size of the battery capacity. Under normal circumstances, 40 100Ah batteries are the most, taking 100Ah as an example, theoretically can store 12V*100Ah=1200Wh.

According to the voltage: the no-load voltage is about 13V, and the load voltage is not less than 11V. The voltage of the battery generally changes with the amount of electricity used by the car, for example, when the car uses a lot of electricity, the voltage will slowly decrease.

Attached car battery introduction:

A car battery, also known as a battery, is a type of battery, and its working principle is to convert chemical energy into electrical energy. Usually, people refer to batteries as lead-acid batteries.

That is, a battery mainly made of lead and its oxides, and the electrolyte is a sulfuric acid solution.

The normal service life varies from 1 to 8 years, which has a lot to do with the condition of the vehicle. In the case of normal backflush power of the vehicle generator and no leakage of electrical appliances, it can be used for more than 3 years. (Photo by Q&A: Q&A called the beast) @2019

1. The car is not easy to start:

When the car does not start well, if it is not caused by the engine or other faults, it is generally caused by the lack of power of the car battery, if it is winter, it may also be caused by the relatively low temperature, and the owner needs to check and confirm.

2. The headlights of the car become dim when decelerating:

If the light is dim when driving at low speed or when the speed is sluggish, it may be caused by the low power of the battery, and it is necessary to replenish the power in time to avoid the phenomenon of battery power loss.

3. Squeak after starting:

When the car's battery is low or malfunctioning, the starter cannot work normally and there is an abnormal sound, which will be more obvious in autumn and winter.

Attached: The habit of hurting the battery:

1. Use electrical equipment in the flameout state:

When the engine is turned off, many people turn on the stereo in the car because they are bored, and the car engine has been turned off at this time, although the fuel consumption is saved, but it has a certain impact on the car's battery, and in the long run, it will affect the service life of the car battery.

2. Forgot to turn off the lights when parking:

This is what many car owners will do, get out of the car in a hurry, forget to turn off the lights, and turning on the lights for a long time will consume the power of the car battery, so the car owner needs to turn off the lights in time after using them to avoid turning on the lights after the lights are turned off.