To determine whether the battery has electricity, its current or voltage should be measured

Excuse me, how do you measure the current of the battery?

Hehe. When the battery is short of power, the terminal voltage drops, and the output current naturally decreases when the same load is carried out.

Usually, it is more convenient for us to measure the terminal voltage, so it is generally judged by the terminal voltage.

There will be a termination discharge voltage of the battery in the manual or nameplate of the battery, such as the nameplate of a 12V lead-acid battery"Terminate the discharge voltage".This means that when the terminal voltage of the battery drops, it must be charged and can no longer be used.

In some DC systems for automatic charging, the terminal voltage is also used to determine whether the battery has been charged.

Similarly, the lithium battery power detection in our mobile phone and camera is also achieved by monitoring its terminal voltage.

Voltage. When the battery is empty, the voltage will generally be less than 80% of the rated voltage.

It is necessary to measure the voltage with a certain load, so that the accuracy is very high, and the specific load should be determined according to the size of the battery.

The capacity of a motorcycle battery is expressed in terms of current and time, for example, if the battery capacity is 7 ampere, it can be discharged for 10 hours at 700 milliamperes (amps), or it can be discharged for 1 hour with 7 amps. In addition, the battery for motorcycles is converted to a 10-hour rate.

I think it's the current.

To be verified. Hehe.

I think any electrical appliance is tested for current work.

Voltage is not terrible, and it is the current that elects people, not the voltage.

Whatever you say, it's not reliable!

I think it is an electric current.

To be verified. Hehe.

I think any electrical appliance is tested for current work.

The voltage is not terrible.

Casually, it's not reliable, and it's the current that elects people, not the voltage.

There are two values for the evaluation of batteries: voltage and capacity (ampere-hours), and the specific differences are as follows:

First, the capacity of the battery.

It has nothing to do with the load current, which is determined by the load power. The capacity of the battery is the product of current and time, under the same negative channel load, the larger the capacity, the longer the service time.

Second, the discharge time is different.

The models are not the same, the capacities are different, even if the voltage is the same, the discharge time or the use time is different. For example, the voltage of No. 5 battery and No. 7 battery is the same, and the actual capacity of the battery may be 800mAh and 1600mAh. For the same model, the battery voltage of different manufacturers is the same, and the capacity is basically the same, but the capacity and internal resistance are also slightly different.

1. There are two indicators of the battery: voltage and capacity (AH, that is, ampere-hour).

2. The capacity of the battery has nothing to do with the load current, and the load current is determined by the load powerThe capacity of the battery is the product of current and time, and the larger the capacity at the same load, the longer the service life.

3. "If the amperage is too large, will it burn out?"The amperage (capacity) is too large" and will not burn out (load, or battery). Because the load current depends on the power of the load.

The first nominal of a battery is its capacity, ampere-hours! The second is its rated voltage! The voltage is determined on the premise! The more ampere-hours! The higher the output current! In other words, the more power is output! This refers to the battery!

To the load! Under the premise that the rated work voltage has been set! The lower the impedance! The higher the operating current! In other words, the more power!

The current of a constant voltage load depends on its own impedance! The capacity of the battery has nothing to do with it!

The way to detect whether the battery is charged is: 1. Check the battery power indicator; 2. Measure the quiescent voltage of the battery; 3. Check the battery fault lamp; 4. When the car starts, check whether the dashboard flashes or darkens the corner; 5. Check whether the battery has expansion, deformation, oxidation and leakage. The reason why the battery is dead is that:

1. Insufficient battery electrolyte; 2. The battery is damaged due to the internal gear rush obstacle and the obstacle is caused. The function of the battery: 1. Provide power to the starting engine system, ignition system, and car; 2. When the engine stops running or idles at low speed, power is supplied to the electrical equipment of the car; 3. When the electricity demand exceeds the power supply capacity of the generator, participate in the power supply; 4. It plays the role of the voltage stabilizer of the vehicle electrical system, which can alleviate the impulse voltage in the point system and protect the electronic equipment on the car.

How to measure the voltage and current of a 12V battery How to measure the quality of a 12V battery You can use a multimeter to measure the voltage of the battery, and judge the quality of the battery by the displayed numbers. The normal value of the battery voltage is 12-14V. In general, if the value is higher than the normal value, it means that the battery voltage is normal or better; If it is lower than the normal value, it means that the battery is not in good condition and we need to pay more attention.

The service life of a car battery is generally about three years, and some car owners need to replace it within two years because of improper maintenance. Therefore, when the owner parks the vehicle for a long time, the battery power should be mainly turned off, and the negative electrode wire can be removed directly, so as to avoid electrostatic leakage when the battery is not used for a long time. If the battery is too low and cannot be charged in time, it will cause some damage to the battery.

When the negative pole of the car is de-energized, it can avoid short circuits, because when the positive circuit is de-energized, the conductors such as wires are energized, which will cause damage to the automotive circuit. In daily use, the car will charge the battery without additional charging. Unless the car is not used for a long time, the battery will discharge on its own.

It is worth mentioning that when we replace the battery, we must pay attention to the time when the car is powered off. If it is normal, it will not affect the central control program. However, pay attention to the circuit when rewiring to avoid short circuits.

Summary. Hello, there are two pieces of this current, and you mainly see whether you measure the starting current or a static leakage current after locking the car. If you test the starting current, you can only use a current clamp to do the test, because all the multimeters on our current market, including the meter pen, cannot withstand the start-up and instantaneous high current.

And this quiescent current means that the battery has no leakage? There is no running power, this can use the current level of the multimeter, the current level of 20 amps, and then string it to the negative pole pile head and negative electrode wire of the battery. So wait for half an hour, all the vehicles have been locked, and then all 4 doors are closed, and then look at the current.

Normally, as long as it is less than 50 mAh, then it means that there is no leakage of the vehicle.

Dear, this question is up to me, it takes a little time to type, please be patient, thank you!

Hello, there are two pieces of this current, and you mainly see whether you measure the starting current or a static leakage current after locking the car. If you test the starting current, you can only use the pre-electric current clamp to do the test, because all the multimeters on our current market, including the meter pen, cannot withstand the start-up and instantaneous high current. And this quiescent current means that the battery has no leakage?

There is no running power, this can use the current level of the multimeter, the current level of 20 amps, and then string to the negative pole head and negative wire of the battery. So wait for half an hour, all the vehicles have been locked, and then all 4 doors are closed, and then look at the current. Normally, as long as it is less than 50 mAh, then it means that there is no leakage of the vehicle.

Hello:——1,Under normal circumstances, the battery is not suitable for measuring the current: the current level of the universal meter has a very low internal resistance, which is equivalent to a short circuit, and the precious power of the battery will be lost during measurement.

If the battery is sufficient, once the current exceeds the measurement gear, it will burn the universal meter.

Batteries (including various power supplies) are only suitable for measuring voltage, not current. If there is a load appliance (or with a load line), the current can be measured.

I want to go to the business hall and ask if the number has been sent out? If you don't have it, you can find it again, so you have to go to the business hall and ask if the number has been sent? If you don't have it, you can find it again, so you have to go to the business hall and ask if the number has been sent?

If you don't have it, you can find it again, so you have to go to the business hall and ask if the number has been sent? If you don't have it, you can find it again, so you have to go to the business hall and ask if the number has been sent? If you don't have one, you can go to the business hall and ask if the number has been sent? Not.

Adjust the multimeter to the voltage level 20V, and the voltage value of the battery can be measured by contacting the watch hand with the battery terminal.

The general open-circuit voltage of the battery in the fully charged state is. When the battery is in the following, it means that the battery has lost power, and it is recommended to use a portable charger to replenish the battery.

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.

There is a special meter for measuring the battery voltage of the car, and at the same time as measuring the battery voltage, there is a resistance wire discharge, and the current can be displayed. In this way, we can measure the quality of the battery and whether there is an electromotive force.

Correctly use the multimeter to select the DC voltage level, select the range, open the target switch with a meter pen against the two levels of the battery, and the reading of the multimeter at this time is the current battery voltage.

Open the front cover of the car, measure the two outlet posts of the battery with a multimeter, pay attention to the positive and negative poles, and measure with DC gear.

The normal value of electric vehicle battery detection is above 9. The battery detection should be re-tested after the battery is discharged, that is, the car cannot be ridden, and the under-voltage protection is accurate. The normal value of electric vehicle battery detection is above 9.

The battery detection should be re-tested after the battery is discharged, that is, the car cannot be ridden, and the under-voltage protection is accurate. The normal value of electric vehicle battery detection is above 9. The battery detection should be re-tested after the battery is discharged, that is, the car cannot be ridden, and the under-voltage protection is accurate.

The normal value of electric vehicle battery detection is above 9. The battery detection should be re-tested after the battery is discharged, that is, the car cannot be ridden, and the under-voltage protection is accurate. The normal value of electric vehicle battery detection is above 9.

The battery detection should be re-tested after the battery is discharged, that is, the car cannot be ridden, and the under-voltage protection is accurate. The normal value of electric vehicle battery detection is above 9. The battery detection should be re-tested after the battery is discharged, that is, the car cannot be ridden, and the under-voltage protection is accurate.

The normal value of electric vehicle battery detection is above 9. The battery detection should be re-tested after the battery is discharged, that is, the car cannot be ridden, and the under-voltage protection is accurate. The normal value of electric vehicle battery detection is above 9.

The battery detection should be re-tested after the battery is discharged, that is, the car cannot be ridden, and the under-voltage protection is accurate. The normal value of electric vehicle battery detection is above 9. The battery detection should be re-tested after the battery is discharged, that is, the car cannot be ridden, and the under-voltage protection is accurate.

The normal value of electric vehicle battery detection is above 9. The battery detection should be re-tested after the battery is discharged, that is, the car cannot be ridden, and the under-voltage protection is accurate. The normal value of electric vehicle battery detection is above 9.

The battery detection should be re-tested after the battery is discharged, that is, the car cannot be ridden, and the under-voltage protection is accurate. The normal value of electric vehicle battery detection is above 9. The battery detection should be re-tested after the battery is discharged, that is, the car cannot be ridden, and the under-voltage protection is accurate.

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.

Batteries are an essential component of automobiles and can be divided into traditional lead-acid batteries and maintenance-free batteries. Since the battery uses lead-calcium alloy as the grid, the amount of water decomposition generated during charging is small, and the water evaporation is also low. In addition, the housing has a sealed structure, which releases less sulfuric acid gas.

Therefore, compared with traditional batteries, it has the advantages of not needing to add any liquid, and the terminal pile head has a long storage time.

Whether the battery is maintenance-free or maintenance-free, there are usage issues. First of all, it is necessary to clarify a principle, that is, before the engine starts, all the electricity used by the vehicle comes from the battery, and after the engine starts, the electricity generated by the generator is used by all the electrical appliances in the car. Proper use of the electrical equipment on the vehicle can extend the life of the battery and keep the battery in good working condition, which is often overlooked by many car owners.

When the car is started, especially when starting with a battery in winter, the continuous and uninterrupted use of the starter can cause the battery to be damaged due to over-discharge. It is recommended that the time of each start of the Sakura section should not exceed 5 seconds, and the interval between restarts should not be less than 15 seconds.

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