The tram has been charged for a long time but it still shows undervoltage, what s going on?

The power display of the electric vehicle depends on the check voltage, if the voltage is too low, then the undervoltage will be displayed。Electric vehicles basically have four or even six batteries, if there is such a situation, it should be a battery disconnected. After such a situation, you should find the broken battery, and then reconnect the wire, so that the problem can be solved.

The battery comes out of the circuit phenomenon.

It may be affected by not tightening the screws during installation, or it may be affected by the loosening of the connector of the wire after the bump when passing over the bumpy ground.

The voltage of each battery used in electric vehicles is 12V, if a battery is broken, then it will affect the voltage is too low, and it can also affect the lack of power out of the motor.

Most electric motors use lead-acid batteries.

and lithium batteries, the two types of batteries work similarly.

The tram has been charged for a long time, but it still shows undervoltage, and the battery should be considered damaged.

The life of the electric vehicle battery itself is charged and discharged 300 times, and it is calculated by the number of times the battery is fully charged and discharged, and the battery capacity drops to 75% of the nominal capacity to calculate, this data is very important, because the user will not charge when the battery is only 75% of the capacity, but when there is really no way to use it, the battery capacity has dropped to 40% of the nominal capacity, that is, there is an overdischarge. Vulcanization begins after the battery is discharged, and obvious vulcanization will occur after 12 hours, and only timely charging can remove the vulcanization that is not serious.

If you do not charge it in time after regular use (sometimes you see that the voltmeter still has electricity and think that there is no need to charge), the vulcanization crystals will accumulate and block the velvet lead micropores in the battery, which will increase the internal resistance of the battery and gradually reduce the capacity of the battery, resulting in the early scrapping of the battery.

Does the charger show that it is fully charged?

If it is not full, it can only be that the charger is broken and there is no output, and you can use the voltmeter to measure the output and compare the parameters on the charger.

If it fills up in a short period of time, there could be two reasons.

1. The problem of the charger, the charging current is too small, you can borrow a charger of the same specification to try it, if it is still the same, that is.

2. The current problem, the life may be up, it may be the quality problem of one of the batteries.

You can go to customer service to check the new car or new battery, and if you use the old one, you can find a car repairer to help you take a look

Summary. 1. The battery car shows a full grid, and the undervoltage is displayed as soon as the gas pedal is reminded, reminding "please charge if the power is insufficient", there is a virtual voltage in the battery, but the current is not enough, and the virtual charge on the surface is instantly exhausted when doing work. This is often referred to as virtual electricity, which may be that the battery has been used for too long and is aging.

2. The battery car display is full, and the gas pedal will display undervoltage, reminding "please charge if the power is insufficient" There may be that the wire in some places inside is not connected, loose or corroded, and sometimes it is easy to cause the battery car to rust on rainy days.

3. The power display is full, but it is not exercised, it may be that one or several batteries in a group of batteries have problems, resulting in a short circuit, or a battery is broken, but in this case it can still be charged, but it cannot be operated normally.

It is recommended to find a professional maintenance master to test it and replace the battery.

What is the reason why the electric car is fully charged but shows that the undervoltage does not go?

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Hello dear, glad to answer for you. This is generally a battery problem, and the battery of the general battery car will be very likely to fail after more than two years of use, so it is recommended to replace the battery with more megabytes. It is fully charged, but as soon as it is started, it shows that the bureau guesses the undervoltage, or the power shows that it is full, but it is not Tongkai can exercise, which may generally be the following problems.

1. The battery car shows a full grid, and the undervoltage is displayed as soon as the gas pedal is reminded, reminding "please charge if the power is insufficient", there is a virtual voltage in the battery, but the current is not enough, and the virtual charge on the surface is instantly exhausted when doing work. This is often referred to as virtual electricity, which may be that the battery has been used for too long and is aging. 2. The battery car shows a full grid, and the gas pedal will show the undervoltage, reminding "please charge if the power is insufficient", and it may be that the wires in some places inside are not connected, loose or rusted, and sometimes it is easy to cause the battery car to rust on rainy days.

3. The power display with Bi Ji is full, but it is not exercised, it may be that one or several batteries in a group of batteries have problems, resulting in a short circuit, or a battery is broken, but this situation can still be charged, but it cannot be exercised normally. It is recommended to find a professional Wei Du repair master to test it and replace the battery.

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The power display of the electric vehicle depends on the detection voltage, and if the voltage is too low, it will show an undervoltage.

Electric vehicles have four or even six batteries, each battery voltage is 12V, if a battery is disconnected, it will cause the voltage to be too low, show undervoltage, and also cause the motor to have insufficient power.

The battery is broken, which may be caused by not tightening the screws during the installation process, or it may be caused by the loosening of the connector of the wire after being bumped when passing through the bumpy road, the solution: After this situation, you should find the broken battery, and then reconnect the wire, so that the problem can be solved.

This condition can be caused by a damaged battery or controller. It is recommended that you check the controller after this has occurred. Electric vehicles are a common means of transportation with a relatively simple structure.

The main components of an electric vehicle include the frame, motor, battery, and controller. The controller is used to control the circuits of the whole vehicle. Without a controller, an electric car cannot run properly.

It is the power source of the electric motor and is responsible for driving the electric vehicle forward. The battery is the part of an electric vehicle that stores electrical energy, and the battery can power the electronic devices of the whole vehicle. However, the battery is also a fragile part and needs to be replaced regularly.

As the number of charge and discharge increases, the performance of the battery will continue to deteriorate. During charging and discharging, the ions in the battery move through the electrolyte, and some ions react chemically with the electrolyte as they move through the electrolyte. As the number of charge and discharge increases, the number of ions in the battery also decreases.

As a result, the performance of the battery will continue to decline. If you can maintain the correct driving habits, you can effectively extend the service life of the battery. It is recommended to use a suitable charger when charging, and be sure to prevent the battery from overcharging.

Overcharging can damage the battery. Do not use the fast charging system to charge the battery when you are using the car.

1. The power display of the electric vehicle depends on the detection voltage, and if the voltage is too low, it will show undervoltage. All electric cars have four or even six batteries. If this happens, one of the batteries should be disconnected.

When this happens, you should find the disconnected battery and then reconnect the wires so that the problem can be solved.

2. The battery disconnection may be caused by not tightening the screws during the installation process, or it may be caused by the loose wire connection after the bumpy road surface.

3. The voltage of each battery used in electric vehicles is 12V. If the battery is disconnected, it will cause the motor to have low voltage and insufficient power.

4. Most motors use lead-acid batteries and lithium batteries, which work on the same principle.

5. The electrodes of the rechargeable battery are made of two metals with different active properties, so that when charging and discharging, the electrodes will produce ions, and when ions are generated, electrons will be generated, so that the external circuit can have current.

There may be several reasons for the undervoltage of the new battery display of the electric vehicle when it is fully charged:

1.Battery quality issues: If you buy low-quality or defective batteries, even if they are brand new, there may be problems such as insufficient capacity, high internal resistance, etc., resulting in undervoltage still showing after being fully charged.

2.Charger failure: If the charger used is faulty or damaged, it will affect the charging effect. For example, insufficient output power, overcurrent protection, and other conditions will cause an undervoltage to be displayed after being fully charged.

3.Failure of other components: In addition to the above two reasons, there are also some other components such as controllers, circuit boards, etc. that can also cause this situation.

Solution: First of all, it is recommended that you check whether the charger you are using is working properly, and try to change to a better brand for testing; Secondly, you can contact the seller or maintenance site for testing and maintenance. In any or no situation, do not disassemble and repair it by yourself to avoid safety accidents.

Summary. The main reason for the undervoltage of electric vehicles is that the battery power is less than 5%, the electric vehicle wiring is not connected well or damaged, and the battery lacks electrolyte. When the power supply voltage of the protected line is lower than a certain value, the protector will cut off the line, and when the power supply voltage returns to the normal range, the protector will be automatically turned on.

At this time, you need to charge it with a professional charger for electric vehicles. Regarding the wiring problem, open the battery box, check whether the fuse is not in good contact, reconnect it well, whether the welding point of the battery connection is loose, if there is a re-welding, or if there is a damaged line, it is necessary to replace it with a new one. As the battery lasts longer, the electrolyte will be reduced, and the electrolyte will need to be refilled or replaced.

It is also possible that the charger is broken and needs to be replaced.

The main reason for the undervoltage of electric vehicles is that the battery power is less than 5%, the electric vehicle wiring is not connected well or damaged, and the battery lacks electrolyte. When the power supply voltage of the protected line is lower than a certain value, the protector will cut off the line, and when the power supply voltage returns to the normal range, the protector will be automatically turned on. At this time, you need to charge it with a professional charger for electric vehicles.

Regarding the wiring problem, open the battery box, check whether the fuse is not in good contact, reconnect it well, whether the welding point of the battery connection is loose, if there is a re-welding, or if there is a damaged line, it is necessary to replace it with a new one. As the battery lasts longer, the electrolyte will be reduced, and the electrolyte will need to be refilled or replaced. It is also possible that the charger is broken and needs to be replaced.

It's just that the riding time is too long, and the power is out and the voltage is underloaded, but the charger is still showing a green light when it is charged.

What's the solution?

After removing the battery, use a high-power charger to activate the battery as follows, and check the actual life of the battery by the way.