What should I do if the 48V battery is fully charged and runs out of power after running for a few k

Electric cars can't go far, and the common reasons are:

insufficient battery capacity;

The brakes do not reset;

controller failure;

motor failure; Faulty charger.

Your battery voltage has, it is estimated that it is a problem with the battery, I don't know how long the battery has been used?

First check if there is a problem with the charger you charged earlier.

If there is no problem with the charger, then you need to check the problem of the battery, you can disassemble the shell of the battery group, and measure the voltage of each battery in turn with a multimeter.

How to maintain the battery of the electric vehicle in use should not be charged frequently, because the charging and discharging cycle of the battery is certain, generally about 300 times, and frequent charging of the battery will aggravate the softening and falling off of the active material on the positive plate of the battery, and will also lead to the acceleration of grid corrosion. Therefore, when the battery is consumed to 70 80 (yours should be used up in the third), it is beneficial to the battery life to be recharged

During the driving of the car, it is not advisable to start and brake frequently, because the current consumption is large at this time, which is not good for the battery.

When encountering steep uphill slopes or poor road conditions, get out of the car and push it (which can be powered) to reduce the high-current discharge of the battery, which is easy to damage the battery.

Always pay attention to the storage of the battery, if there is a loss of power, it should be charged in time to prevent vulcanization;

When charging, it should be charged until the green light is on, and it is not advisable to stop charging and then drive halfway, which is very easy to produce vulcanization;

When the car is not used for a long time, it should be fully charged, and the battery should be replenished once a month to release vulcanization.

1. The battery itself is a problem, so look for after-sales replacement.

2. There is a problem with the quality of the charger and it cannot be charged continuously.

3. It is a motherboard problem, but it is generally not the reason.

It is recommended not to use any original or external seat charger when charging, including the universal charger, which is harmful to the battery, especially the universal charger can not be charged 100%, up to 65%.

48V, then the total voltage limit is V, once discharged to this voltage, it will automatically cut off the power supply. But once the discharge is stopped, the battery voltage will rise, and it can generally return to more than 11 volts quickly, at this time, it can be discharged again, but because the power of the motor is related to the battery voltage, each voltage can be reached when the battery is fully charged, and the car can run to about 30 yards, but when the voltage of each battery is 11 volts, it can only run to about 10.

The function of the overcurrent protector is to prevent the battery from being over-discharged and causing permanent damage. In order to give customers a good impression that the battery is good, some electric vehicles remove this device and can put the battery to zero volts, and this discharge will cause permanent damage to the battery.

A full battery can run 65-75 km. (The odometer that comes with the electric car is not accurate).

The battery of the electric vehicle is faulty, and there is no storage capacity, so you need to go to the electric vehicle maintenance point to replace the new battery.

Battery, also called battery, battery is a kind of battery, 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.

Check if there is any problem with the electric vehicle battery. First of all, check whether the connection of the charging circuit is reliable, check whether the connection between the wire and the plug is intact, and carefully check whether the socket and plug are available"Ignition"Arc burning phenomenon, whether there is line damage and wire breakage, etc.

The damage of the electric vehicle that is usually checked, when the electric vehicle is starting, carrying people, and going uphill, please use the pedal to help and try to avoid instantaneous high-current discharge. High-current discharges can easily lead to lead sulfate crystallization, which damages the physical properties of the battery plates.

Generally, the electric vehicle is a group of four batteries, about 300-500, if you need to change, it is best to choose a regular choice of maintenance location.

The battery should be at the end of its life, if it can't be used, you can try to repair it first, if it still doesn't work, you can only replace the battery.

Repair method: 1. Use positive and negative pulses to depolarize and charge the battery, and then completely discharge, so cycle three times, if the capacity has signs of recovery, you can cycle it several times to achieve a better repair effect.

2. Add water for repair, add deionized water or purified water when adding water, do not add tap water, it will cause the problem of large battery self-discharge. Here's how:

1) Discharge the battery completely first (after discharge, the acid density inside the battery is basically the following, which is similar to water);

2) Take out the cover piece, and then remove the safety valve, pay attention to keep it, do not dirty the safety valve, for later use;

3) Add water, generally the water added in a single grid of 12Ah battery is 8 10g, and the water added in a single grid of 20Ah battery is about 15g;

4) Let stand for about an hour, and install the safety valve and cover sheet;

5) Use the matching charger for charging, and then fully discharge after being fully charged, and so on for three cycles.

The battery is out of power, so change the battery.

When the battery life is up, replace the battery.

If the electric vehicle battery is full as soon as it is charged, and it runs out of power as soon as it runs, the main reason is the battery vulcanization failure, which is mainly manifested in the formation of a layer of large particles on the surface of the negative plate inside the battery, and the white hard crystalline body cannot be peeled off after charging, resulting in the battery is not durable. So, how to fix it?

Direct replacement? The cost is too high to be necessary. The vulcanized battery can be repaired with a repair instrument, using fuzzy digital control theory, by measuring the state of the battery, while charging and discharging, it continuously emits positive and negative frequency conversion particle waves, and it takes 10 to 20 hours to remove the hard lead sulfate that becomes hard after crystallization in the battery.

Of course, this is generally a slight vulcanized battery, if it is more serious, you can only choose to replace it.

Of course, another important cause of vulcanization is the failure of battery water loss, which will bring serious vulcanization, reduce the capacity of the battery, and then lead to thermal runaway and deformation of the positive plate, and the expansion of the battery shape, which may eventually lead to the scrapping of the battery. So, how to repair a battery that has lost water?

The first step is to pry open the cover plate above the battery, open the rubber cap, and expose the exhaust hole, through which you can see the inside of the battery to see if there is dryness inside the hole, that is, whether the battery is losing water. The plates of the battery are wrapped in white fiberglass wool, which should be moist under normal conditions. In the second step, distilled water is sucked through the drain through the drain hole to inject into the battery.

In the last step, cover the vent with a vented shield to prevent dust from falling into the vent. It is best to use medical secondary distilled water. The principle of water replenishment is to rather less than more, not enough can be added, more will cause the specific gravity of acid to decrease, and the battery capacity will be insufficient.

Of course, there are other external factors that will cause the battery to run out of power as soon as it is fully charged, such as factors such as damaged chargers.

In fact, in the process of daily use, electric vehicles should also pay attention to more maintenance, such as charging frequently, and do not wait until there is no power to charge. Also, don't mix chargers, let alone use fast charging. In this way, the EV battery will last longer.

1. The motor has a short-circuit fault, resulting in the electric vehicle only running a few kilometers when fully charged.

If there is a partial short circuit in the motor, then when the electric vehicle is fully charged, its range will be greatly reduced, and it will only run a few kilometers, or even be unable to drive. For this kind of problem, the general solution is to choose to repair the motor, if it cannot be repaired, you can only choose to replace it, in order to solve the problem that the electric vehicle only runs a few kilometers when fully charged.

Second, the controller failed, resulting in the electric car only running a few kilometers when fully charged.

As an important part of the electric vehicle, the controller is equivalent to the "brain" of the electric vehicle. If it fails, even if the electric car is fully charged, it will only run a few kilometers or will not be able to drive.

For this kind of problem, the only option is to replace the controller with a new one, because the repaired controller is prone to recur problems.

Third, the battery has been charged, resulting in the electric car only running a few kilometers when fully charged.

If the battery of the electric vehicle is often loaded or charged irregularly, then it will cause the phenomenon of battery charging. Once the battery is charged, the range of the electric vehicle will be greatly reduced, and it will only run a few kilometers on a full charge. For this kind of problem, it is generally necessary to replace the battery with a new one.

However, it should be noted that do not believe that adding water can solve the problem of filling the drum, because most of the current batteries are maintenance-free batteries.

Fourth, the charger is faulty, resulting in the electric vehicle only running a few kilometers when fully charged.

This is one of the most easily overlooked problems, and some users have a battery problem after a sudden drop in battery life, which is not the case. They tend to overlook EV chargers. Why?

Because once the EV charger fails, the output voltage will be too low, so that the EV only runs a few kilometers. For this situation, replacing the charger can solve the problem. However, it is also necessary to remind you not to carry a charger with you in the car to prevent the components from falling off.

Hello, under low temperature conditions, the capacity of the battery, the discharge speed will be accelerated, this phenomenon has a particularly obvious impact on the inferior battery, after charging and storage as much as possible at room temperature, in addition you said that there will be electricity again, I personally think that the circuit problem is more likely, of course, the temperature factor is not excluded, but it may also be that there is a short circuit or virtual connection in the circuit. I hope it helps, welcome to ask!

The battery is broken or aging. Replacing the battery is the most thorough solution.

When riding an electric vehicle on a daily basis, you should also pay attention to the following ways to make the battery last longer:1Never let the battery stay in a state of insufficient power for a long time, and develop a good habit of charging the battery every night; 2.

If the electric vehicle is not used for a long time, the battery should be fully charged and stored3.Try to avoid the uphill start of the electric car;4.When riding, it is necessary to pay attention not to let the battery over-discharge, over-discharge is easy to cause serious battery loss, which will greatly shorten its service life, electric bicycles are generally equipped with under-voltage protection function, when the battery power display only one display light is on, the battery should be charged immediately, so as to avoid over-discharge of the battery.

Wire line issues.

The reason is that when charging an electric vehicle, if there is a problem with the wires and lines, it will give people an illusion that it is not charged, and the green indicator of the charger has been lit to show that it is full, so there will be a battery that is out of power when riding an electric vehicle.

There is also another possibility that the wire connected to the charger has no power at all, so that the green indicator light will light up after the charger is connected to the socket, which will also give the illusion that it is already fully charged.

The solution is to go to a repair shop to have it checked and repaired.

Batteries have very high temperature requirements. Generally speaking, it works normally at 25°, and the power is very durable. However, if the temperature reaches below 15°C, the battery of the electric vehicle will definitely be affected to a certain extent.

At this time, electric vehicles can generally only be charged to 2 3 when charging, so although we have seen electric vehicles fully charged in winter, they are actually not.

As the weather continues to get colder, the battery storage of the electric car will definitely drop a lot, and sometimes you will find that the power of the electric car will drop a notch immediately.

The charger is damaged.

The chargers of electric vehicles all have indicator lights. A red light will be displayed during the charging process, and a green light will naturally be displayed during the discharge process. However, due to the damage of the charger due to the use of the charger for too long or other problems, it cannot be charged when charging, so there will also be a situation where it is full as soon as it is charged, and it is out of power when it is ridden.

If the internal circuit of the charger is not in good contact, it will not work normally after the circuit is connected, so the green indicator light of the charger will also light up, which makes people mistakenly think that it has been fully charged, but in fact it is not charged.

The electric vehicle is placed for a long time before it can be charged, but the battery is not charged in a timely state, and it is inevitable that the phenomenon of sulfation will occur: the lead sulfate crystals are attached to the plates, blocking the ion channel, resulting in insufficient charging and a decrease in battery capacity, which will cause more serious damage to the battery.

Therefore, if you usually use the electric car for the time being, you should also charge the battery once a month to prolong the service life of the battery; In addition, electric vehicles should also avoid carrying heavy loads, and should also pay attention to avoid damage to the battery caused by large discharges when starting or going uphill.

The battery battery is completely broken.

In a certain way, the electric vehicle battery is like a human muscle, which has a service time, that is, it has a certain lifespan. At present, most battery cars use lead-acid batteries, the charging and discharging cycle is about 300 times, normal use for a year and a half, the capacity has dropped to less than eighty percent of the rated capacity, the capacity has become smaller, of course, it can not be charged into the electricity, that is, the surface is charged in, full, in fact, there is not much power inside, it is simply running.

If the battery is left for a long time, it needs to be charged every once in a while to maintain a certain amount of power for it to activate, otherwise it will also be damaged by aging. If the battery is broken, it is generally impossible to repair it and can only be replaced with a new one.

Especially in the summer, hot weather and high temperatures can affect the charging of electric vehicle batteries, and the battery itself generates a small amount of heat during the charging process. Therefore, the temperature of the charging bottle rises at too high a temperature, thereby causing damage to the performance of the battery; Conversely, a charging temperature that is too low can also lead to a shorter battery life.

Therefore, in the daily use of electric vehicle battery charging process, it should be noted that if the driving range of the electric bicycle suddenly drops by more than ten kilometers in a short period of time, it is very likely that at least one battery in the battery group has a short circuit phenomenon such as broken grid, plate softening, and plate active material falling off. At this time, you should go to a professional battery repair institution for inspection, repair or matching.