Is the battery repair reliable?

Will you encounter various problems in the use of electric vehicles, but you are at a loss? Here, a master with more than ten years of car repair experience will answer all the questions you may encounter. 1. What's the reason why the newly purchased electric car can't run far? 1. Motor. This will be thought of first. Large current consumption, such as motor demagnetization. 2. Controller. For example, the parameters drift after a period of time, and the cut-off voltage is high. 3. The problem of mechanical resistance. Such as insufficient tire air, bearings, brakes and so on. 4. The charger is insufficiently charged. 5. The problem of the battery itself and the temperature difference. 6. Lines. The line problem is a soft fault. There is no problem with each component, but resistance is generated in the connection, and there is a voltage divider when there is resistance, and the greater the current, the greater the voltage divider. Turn the handle of the new battery to turn off the light. This problem is very common, and it's nine out of ten of them that don't run far. 2. The circuit problem causes the resistance to be large. Where is the problem? 1. The connection plug between the controller and the battery, and the connection plug with the motor: good connectors are gold-plated and silver-plated, the general ones are copper or copper-plated, and the worst ones are iron. Over time, it will oxidize and produce contact resistance. It will generate heat when a large current passes through it, and it will burn to black in severe cases. 2. Fuse. Bad contact. The clamp is not tight, and the pressure is not solid. 3. The electric lock switch connected to the main circuit. 4. Welding of battery solder joints. 5. The battery connection wire is too thin, or it is not a copper wire. The line length is not good. 6. Wrong wire connection. For example, the thin red wire of the controller is connected to the battery. 7. The output port or contact of the battery box is in poor contact. 3. The motor is weak and consumes a lot of electricity, and it can't run far. What is the reason? 1. If your electric car motor always feels unable to run, it is probably because the motor controller is aging. The motor controller is aging, which causes the output power to be too small, causing the motor to be weak. 2. Another case of electric vehicle motor weakness is that the magnet is demagnetized, so that the motor does not have enough driving torque, and the current is greatly increased, and the power consumption is serious. 3. The short-circuit or serious leakage of the coil causes the electric energy to be converted into a large amount of heat energy, and the temperature rises rapidly, which causes a serious decline in the performance of the motor, and also causes the motor to become weak or even damage the motor. 4. What is going on when the battery gets hot? If you feel that the battery is always hot when your electric car is charging, it may be due to the high voltage of the charger. If the charger voltage is too high, the vulcanization of the battery plate will accelerate, which will cause the electrolysis of the water (generating H2 and O2) in the later stage of the charging, and the internal pressure of the battery will increase, H2 and O2 will leak, resulting in water loss. When too much water is lost, thermal runaway occurs inside the battery, and the battery will swell. 5. What is the reason why the charger does not turn green? Is there any way to charge your charger, but it just doesn't turn green? The reasons why the charger does not turn on the lights are roughly as follows: a. The battery loses too much water. b. The high voltage of the charger will cause the current to rise instead of falling, resulting in severe heating and forming a vicious circle. The charger is always in the high voltage stage and does not turn on the green light. c. Adding liquid containing iron, manganese, copper and other impurities to the battery will cause serious self-discharge of the battery and cause the charging current to rise instead of decreasing. The same will not turn the green light. d. There is a slight short circuit inside the battery. e. The current of the charger to turn the lamp is too low. A battery with a slight failure will cause the green light to not turn. 6. Why does the temperature affect the battery usage? The temperature also has a greater impact on the battery. When the ambient temperature is higher than 40°C or lower than -10°C, the battery life will be shortened. Therefore, when the temperature is low in winter, the capacity drops by 1% every time the temperature drops by 1 degree. Electric vehicle batteries should be stored indoors and charged indoors. 7. What causes the spontaneous combustion of electric vehicles? 1. In the later stage of battery charging, a large amount of H2 and O2 are generated, which will burn and explode when encountering an open flame. 2. Poor line insulation, leakage, short circuit, causing wire burning, and then the whole vehicle burning. 3. The safety device is invalid or replaced with iron or copper wire. 8. What are the precautions for battery filling? 1. The liquid inside the battery is not conductive. If the added liquid contains impurities (iron, manganese, copper, etc.), it will cause serious self-discharge of the battery and the battery will be scrapped in advance. 2. If you plan to add water and liquid to the electric bicycle yourself, the added liquid must be deionized water (or double distilled water). 9. Is the battery repair reliable? 1. After the battery is used for a period of time, lead sulfate crystals will be produced on the electrode plate, which will vulcanize (and passivate) the battery electrode plate, and reduce the charge and discharge capacity (no charge or discharge). 2. The repairer can output high-energy electric pulses. , Forming a 'bombardment' effect on the sulfide on the battery plate. (To make an analogy: ultrasonic stone crusher) 3. Bulging, deformation, air leakage, open circuit, short circuit, softening, powder removal cannot be repaired. 10. What are the reasons why electric vehicles get worse as they are repaired? 1. Please go to a professional repair station to repair the car. 2. Electric vehicles are the product of science and technology, and the circuits are relatively complicated. Only a variety of advanced and professional testing instruments are used to conduct comprehensive, systematic and scientific tests on electric vehicles. 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