The electric car charger burned, can it be repaired?

I can repair it. Common EV charger failures:

Fuse tube blowing:

In general, a blown fuse tube indicates that there is a short circuit or overcurrent fault in the internal circuit of the charger. This is due to the failure rate of the internal components of the charger working at high voltage and high current for a long time.

Higher. In addition, fluctuations in the voltage of the power grid, surges.

It will cause the current in the charger to increase instantaneously and cause the fuse to blow.

There is no DC voltage output, but the fuse is intact:

It means that the charger is not working, or it has entered the protection state after working.

No DC voltage output or unstable voltage output:

If the fuse is intact, under inert condition with load. The main causes of this kind of fault are: open circuit of overvoltage and overcurrent protection circuit.

short-circuit phenomenon; The tuberculosis circuit is not working; The power supply is overloaded, and the rectifier diode is in the high-frequency rectifier filter circuit.

Broken down: Filter capacitor.

Leakage, etc. DC voltage output is too high:

In the charger, the DC output, sampling resistor, error sampling amplifier, optocoupler, power control chip, etc. together constitute a closed control loop, and any problem will cause the voltage to rise.

Heat fans are not**

The main source of the fault is the triode that controls the fan.

Generally 8550 or 8050) is damaged, or the fan itself is damaged or the fan blades are stuck by debris. However, some chargers use intelligent heat dissipation, and for chargers that dissipate heat in this way, thermistors.

The probability of damage is very high.

This thing burns out and generally can't be repaired, even if the master repairs it, it is estimated that it will not take a few days. It's better to spend some money to buy a new one...

Can be repaired. But I think it's too much trouble for you to go and fix it, you might as well buy a new one. There are cheap and expensive ones, it's up to you to choose.

The plug of the electric vehicle charger is burned out, and the charger plug does not match the socket, such as the two pieces of the plug are bent back and forth, and they are forced to be plugged in for a long time.

If the model is matched. Then the problem to consider is the line problem.

Summary. Hello, dear, it is a pleasure to serve you, the reason why the charger burned when the electric car was charging; 1. Check whether the battery is connected correctly and whether there is reverse polarity; 2. Check whether the polarity of the battery charging socket is reversed, and whether the polarity of the charger is reversed, resulting in over-discharge. 3. Check whether there is a short circuit in the battery charging base or wire, and the reverse pole short circuit must be eliminated.

If the battery has been charged and reversed, it needs to be discharged first (the temperature is controlled above 50 when discharged), and then the charger is continuously charged for 15-18h, so that the voltage returns to normal and then the discharge check is repeated 2-3 times, and the capacity can be put into use after returning to normal, and the capacity is less than 84min for scrapping.

What is the reason why the charger burns out while charging an electric car.

Hello, dear, it is a pleasure to serve you, the reason why the charger burned when the electric car was charging; 1. Check whether the battery is connected correctly and whether there is reverse polarity; 2. Check whether the polarity of the battery charging socket is reversed, and whether the polarity of the charger is reversed, resulting in over-discharge. 3. Check whether there is a short circuit in the battery charging base or wire, and the reverse pole short circuit must be eliminated. If the battery has been charged and reversed, it needs to be discharged first (the temperature is controlled above 50 when discharged), and then the charger is continuously charged for 15-18h, so that the voltage returns to normal and then the discharge check is repeated 2-3 times, and the capacity can be put into use after returning to normal, and the capacity is less than 84min for scrapping.

Dear, hello, maintenance method: 1. Carefully check the various components on the circuit board to see if the appearance of these components is burned or there is electrolyte overflow, and smell if there is anything unusual. 2. Measure the resistance value of the power input terminal, if it is less than 20ok, it means that there is a local short circuit phenomenon at the back end, and then measure the resistance value of the positive and reverse resistance values of the four rectifier diodes and the resistance value of the two current limiting resistors respectively to see if there is a short circuit or burnout; Finally, measure whether the power filter capacitor can be charged and discharged normally, whether the switching power tube is broken down, and whether the UC3842 and its surrounding components are broken down or burned out.

3. If there is no above situation, it is necessary to measure whether the input power line and the output power line are short-circuited internally. In general, in the fuse fuse fault, rectifier diode, power filter capacitor, switching power tube, UC3842 are wearing parts, the probability of damage can reach more than 95%, to focus on checking these components, can quickly eliminate the fault.

There is damage.

It doesn't matter how fast or slow the battery is charged; The key is the discharge time; It can be used for a long time after discharge; As long as the battery can be charged and discharged, it can continue to be used; If you buy a big domestic brand, you can; If you can identify the quality of the product, you can also buy the brand products of small and medium-sized manufacturers; It's more cost-effective.

The bulging of the battery is generally due to air leakage and deterioration, and it is usually the beginning of the inability to continue to use; If the battery is bulging, it has no effect on the life of the device; However, some batteries are prone to bursting after the bulging; In the small space of the equipment, it is easy to damage the equipment; Therefore, do not use the battery after the drumming.

Note: (1) "Vehicle" refers to motor vehicles and non-motor vehicles.

2) "Motor vehicle" refers to a wheeled vehicle that is driven or towed by a power unit and driven on the road for personnel or for transporting goods and carrying out special engineering operations.

3) "Non-motorized vehicles" refers to vehicles driven by human or animal power and driven on the road, as well as motorized wheelchairs for the disabled, electric bicycles and other vehicles that are driven by power units but have a design maximum speed, empty mass and external dimensions that meet the relevant national standards.

It will definitely have an adverse effect on the battery, because there will be a large current flowing through the battery and the charger when the charging is reversed, so your charger will burn out, and the battery will heat up violently because the current is too large, so that the plates will swell and be damaged, and the active material will fall off, reducing the storage capacity and service life. Since you don't have the wrong connection for a long time, the battery may still last for a while, but the storage capacity is definitely not as good as before.

Therefore, it must not be reversed when charging, but now there is a charger with a protection function, if it is reversed, it will alarm or automatically exchange polarity.

If the EV charger burns out, it will not affect the battery, because the charger is insideFusesIf the charger is broken, the fuse will burst and will no longer affect the battery. But if the battery is broken, the charger will have an impact.

Electric vehicle. The overall biggest concern is the charging problem, and we must pay attention to the charging of electric vehicles. If charged like this, even the best battery will be charged.

First, charge after parking. Charging after parking is the charging method of many car owners. A lot of EV drivers don't want to see a battery drain when they go out every day, so they just stop and charge.

But in this way, the temperature of the battery is too high, and the temperature is too high will cause the battery to dehydrate, and the life will be reduced, and the electric vehicle will also be greatly damaged, so it is necessary to let the car stand for 30 minutes, and then charge the battery after the temperature becomes cold.

Second, the continuous charging time is more than 12 hours, which is also the charging method of almost all car owners, charging directly at night and unplugging it in the morning. However, after 12 hours of charging, it is necessary to keep the battery to about 8 hours, knowing that the current will continue to charge the battery, and the battery life will be shorter if the time is longer.

Thirdly, with a fast charger, fast charging looks like it can greatly reduce the charging time, but what is more convenient is that this high-voltage charging will cause the battery to dehydrate and roll the battery into the drum, so try not to go to the fast charging station if you have the strength. Fourth, there are bosses who use charging heads that do not match electric vehicles and mix chargers when using them. In this case, the battery and charger of the electric vehicle are not suitable, and the battery is easily damaged, so try to use the charger one by one.

Fifth, it seems normal to carry the charger with the car, and the charger is placed in the car, and it is not very simple to flush it directly when you want to use it? However, as the electric car shakes, the internal parts of the charger are easy to fall off, and such a charger will also cause a lot of damage to the electric vehicle. For users of electric vehicles, these five charging methods are still not recommended for everyone.

Otherwise the battery will be damaged, which is also a big expense.

If the charger is broken, it is best to change it to prevent danger, how many electric vehicles are on fire when charging, and you are more likely to have an accident if the charger is broken, so it is better to pay attention.

It is best to configure and buy according to the model and specifications of the original charger, such as: 48V 12Ah battery for electric vehicles, and the charger should match 48V 12 14Ah to meet the needs of electric bicycle batteries.

First of all, please check whether the charger output plug and the charging plug of the battery case are plugged in tightly. If you are sure that there is no problem, you can check whether the fuse tube on the battery box is open or the fuse holder is loose and has poor contact. In addition, some models need to open the battery lock before charging.

If the above faults are eliminated, consider whether the output line of the charger is open, you can use the voltage block of the multimeter (200V gear) to measure the no-load output voltage of the charger, which should be 41-44V (with 36V battery varies depending on the charger), if not, it may be that the output line of the charger is open, and the charger is turned on, and the output line is replaced to eliminate the fault. Note: When replacing the charger output cable, be sure to pay attention to the positive and negative poles of the original machine not to be reversed.

Battery car charger, plug in the power supply directly without plugging in the battery to see, if the traffic lights are on is normal, if it is not this phenomenon, it may be that the charger is broken. If the charger is broken, it may be that the coil is burned, and it is not good to repair it if it is not a professional person. Just get a new one.

Chargers are divided into power frequency and high frequency according to the working frequency of the design circuit. The power frequency machine is designed based on the principle of traditional analog circuit, and the internal power components of the machine (such as transformers, inductors, capacitors, etc.) are larger, and there is generally less noise when running with a large load, but the model has strong resistance in harsh power grid environmental conditions, and its reliability and stability are stronger than that of high-frequency machines.

First of all, confirm that the charger is broken: The indicator light has always been green when charging, and the reasons may be: the charger and the battery end are not connected, the output line of the charger is broken, the internal connection line of the battery box is broken, the fuse of the battery box is burned out, the battery itself is damaged, and the red light-emitting tube of the charger is damaged or faulty;

The red light cannot turn green when charging, the reasons may be: the voltage is too low due to the damage of a single battery battery, the severe water loss current of the battery is too large, the battery temperature is too high, the leakage in the battery is too large, and the charger itself is damaged to form a voltage runaway;

The indicator light does not light up because the charger is damaged or the indicator light is damaged; 4.The reason for the abnormal sound or non-rotation of the fan is that the fan is damaged or the circuit is faulty.

The tram charger is broken to teach you how to repair it, in fact, it is very simple!

First of all, determine whether the charger is broken, the charger is not connected to the battery when the power is turned on, if the indicator light is on, the charger is not necessarily broken, if it is not lit, it is broken! If the charger is broken... Generally, people who have no repair experience have no way!

Detailed].

An electric vehicle charger is essentially a switching power supply, or an electronic transformer.

Generally, the breakdown of the damaged switch tube or the breakdown of the push-pull tube. Find out the cause and replace it with a tube of the same model or similar parameters.

It should be the transistor that is broken, but you don't know if it was the component that made the transistor broken, or if the transistor itself was broken. The board that cannot be repaired is very unsafe, do not repair it worthless. It's hard to find the right transistor or other accessories.

The cost is also like buying a new one. The board that cannot be repaired is very unsafe, do not repair it worthless.

Plug in the power supply directly without plugging in the battery to see, if the traffic lights are on is normal, if it is not this phenomenon, it may be that the charger is broken, ask the after-sales service point.

It should be that there is a problem with the connection between the charger and the battery, measure the battery charging port with a voltmeter to see if there is a voltage? If there is, you can rule out the battery reason, (if there is no voltmeter, you can remove a light bulb from the electric car and connect it directly to the battery, if it is bright, it means that the battery connection is fine)! Check the electrical output cable.

Upstairs, this kind of board is very cheap, and it is really not cost-effective to repair.

It seems that the switch part is damaged, and if you want to study and practice, you need to match the circuit according to the chip type, draw the circuit diagram, and guess the value of resistance and capacitance, which is more troublesome.

I have 2 of them burned down in this place, if you need it, you can give it for free (postage you pay).