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The most injured electric car battery charging method, many people are committing!

Date:Apr 04, 2019

The emergence of electric vehicles has facilitated a lot of life. As the urbanization process continues to accelerate, many people choose to use more convenient electric vehicles. Therefore, many families have purchased two or more electric vehicles. Most electric vehicles are different brands and different types of electric vehicles. Of course, this also shows that the chargers and battery models of electric vehicles are also different. This has caused electric vehicle users to use it frequently during use. They even use a 60V charger to charge 48V batteries and 20AH chargers to charge 12AH batteries. They do not know that this will greatly reduce battery life. 

Let us first analyze that the battery pack of a 48V electric vehicle is generally made up of four 12V batteries in series, and the 60V is made up of five pieces in series. The motor, controller, tires, brakes, etc. are all equipped. Different, the configuration of the 60V tram is relatively higher. The principle of the charger and the battery is that the output voltage of the charger is slightly higher than the battery voltage, and the output current of the charger should be suitable. It is usually suitable for 8 to 10 hours. Generally, the motor power used in a 48V electric vehicle is 350W, and the motor power of a 60V electric vehicle is higher, 600W or 800W.

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Let us look at the voltage of a lead-acid battery that is usually rated at 12V can be floated to 14.7V (the lead-acid battery has a temperature effect, and the 12V lead-acid battery is less than 25 degrees below the normal temperature, 1 degree should be A charge voltage of approximately 18 millivolts is added. Conversely, for every 25 degrees of ambient temperature, 1 degree must be reduced by 18 millivolts.

In addition, we define the terminal voltage of the battery to discharge to 90% of its rated voltage and consider the discharge limit voltage of the battery. Therefore, the limit discharge voltage of the 60V battery pack is 54V, and the terminal voltage will be discharged after the 60V battery pack discharged to 54V stops discharging. Naturally rebounded to around 60V. It can be seen that the 48V charger can not charge 60V battery at all, (the 48-volt lead-acid battery charger usually has a maximum float voltage design of about 57.6 volts).

So can the 60V charger charge the 48V battery? Of course, the answer is no good!

Because the use of large current charging causes the battery to decarburize seriously, and thus heat deformation, which is also an important reason for long-term use of the battery charging drum. Some electric vehicle users have reported that just changing the battery has not been used for one month, and finally understands the result of using the high-power charger multiple times.

Finally, I would like to make a suggestion to everyone: the charger is dedicated to the car. If it is broken, it will be checked by a professional in a car shop or a repair shop. With a new qualified charger, you can not mix other chargers. Of course, don't be greedy, you can't guarantee that you can buy the charger that suits your model!


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