Electric cars are used more in our lives, and in the process of using them, we naturally need to pay attention to the use of electric vehicles. Charging time to the battery car should not be too long; overcharging will lead to a long time of battery heating, speeding up the battery scrap rate. Theoretically, after complete discharge, the battery is charged according to 0.1 nominal rates (standard battery charge), and about 10 hours can be full; considering the charger efficiency and battery depreciation factors, the general charging time between 10 hours to 12 hours can be, the limit should not exceed 16 hours. Many people have the misconception that the charger is intelligent charging. How to charge does not matter. Therefore long time constantly opens the charger, which not only damages the charger but also damages the battery.

Get into the habit of charging every day. There are many people who ride 2-3 days without power before charging, resulting in the battery has been in a deep discharge situation, which is very bad. The battery life is greatly reduced! It is recommended that you charge every day; the battery life will be extended.

　　The charging environment should be stable. The best ambient temperature for charging is 20-28℃. In addition, with the weather does not pass, the charging situation is also different, winter or summer charging, there will be overcharging or undercharging. So try to ensure a safe and stable charging environment.

　　Electric bikes should not often be seriously overloaded in normal riding to protect the frame of electric bikes. The frame of the electric car is far less load-bearing than the motorcycle, but some people are used to moving the overload of the motorcycle to the electric car. Once the metal of the frame is fatigued and fractured in the exercise, it is likely to cause serious accidents.

　　Blown fuse

　　In general, a blown a fuse indicates that there is a short circuit or overcurrent fault in the internal circuit of the charger. As the charger works in the high voltage, high current state, DC filtering, and oscillation circuit in the high voltage state for too long, the voltage changes relatively large. In addition, fluctuations in grid voltage surges can cause an instantaneous increase in current within the charger and fuse blowing.

　　Maintenance method: First of all, carefully check the components on the circuit board, see whether the appearance of these components are burned paste or electrolyte overflow, and smell whether there is an odor. Then use a multimeter to check.

　　First, measure the resistance value of the power supply input; if less than 200KΩ, it means that there is a local short circuit at the back end, and then measure the four rectifier diodes, respectively, reverse resistance and two current limiting resistor resistance, to see if there is a short circuit or burned; then measure the power supply filter capacitor can be charged and discharged normally, and then measure whether the switch power tube breakdown damage, as well as the UC3842 itself Then measure the power supply filter capacitor to see if it can be charged and discharged normally, and then measure whether the switch power tube is broken and damaged, and the UC3842 itself, and whether the surrounding components are broken and burned.

　　It should be noted that: because it is in the road measurement, there is a possibility that the measurement results may be wrong, resulting in misjudgment. Therefore, if necessary, the components can be soldered down and then measured. If there is still no such situation, then measure the input power line, and the output power line is an internal short circuit. In general, the fuse meltdown fault, rectifier diodes, power supply filter capacitors, switching power tubes, and UC3842 is vulnerable parts, with the probability of damage up to 95% or more; generally, focusing on checking these components, it is easy to exclude such faults.