How to choose electric car charger manufacturers, what are the characteristics of high-quality chargers? Printed Circuit Board: High Temperature Resistance, flame retardant, anti-vibration, environmental protection; Components: Brand components, automatic slicing, high performance, high temperature aging; transformer: pure copper, good conductivity, low loss, current carrying capacity, good thermal stability; Fan: High Quality Fan, durable, good heat dissipation; frequency conversion technology: Conversion rate more than 95% , more power-saving; in addition to the quality of the charger itself, the second charge is more important! 02 select a charger that matches the battery and then charge it with a charger that does not match the parameters. What’s the effect on the battery? 48v12ah charger to 48v20ah battery charging as an example: 48v12ah charger current less than 48v20ah battery charging value requirements, will lead to start charging current is small, leading to insufficient battery charging. Because the conversion current of the 48v12ah charger is much lower than that of the 48v20ah charger, the lamp-jumping time will be prolonged during the charging process, leading to the battery charging time being too long, resulting in battery deformation.48v12ah battery 48v20ah charger, for example, because 48v20ah charger current than 48v12ah battery, the active material will fall off, long-term use will shorten the battery capacity. Because 48v20ah charger conversion current is higher than 48v12ah battery, so charging will jump ahead, resulting in higher battery voltage, that is, not satisfied. Since chargers are so important, how do we use and maintain them? Do not replace the charger at will, according to manual requirements to use the charger correctly. Charger manufacturers, the correct way to use: 1 charge, first plug in the battery, then add power; 2 full, first cut off the power, and then pull the battery plug. Otherwise, it could easily damage the charger. Before replacing the charger, make sure that the charger is compatible with the whole vehicle, use the original charger as far as possible, prohibit the use of non-standard and inferior chargers to charge the batteries of electric vehicles, and avoid causing unnecessary damage to the batteries. Put the battery in a well-ventilated place to charge, because the charging process will generate a certain amount of heat, it is recommended that the battery in an open ventilated place to charge. In the charging process, do not cover the impurities on the charger, otherwise it may damage the charger and battery, or even cause a fire accident. In addition, the charger can not be charged with water or rainwater. Avoid frequent vibration of the charger, do not carry a charger, strengthen the protection of the charger, can fundamentally extend the life of the charger. Otherwise, many parts inside the charger will be damaged and fall off during driving. When using the charger, check whether the indicator light is normal. When using the charger to charge the battery, check whether the indicator lamp is working properly. If the charger is not charged while charging, the charger is likely to be damaged.