How Much Power Does It Take To Fully Charge An Electric Car Battery?

How Much Power Does It Take To Fully Charge An Electric Car Battery?

Date:Jan 11, 2019

lithium batteries

Recently, some users have asked me how to charge the electric vehicle battery when the electric vehicle is completely discharged. How many times does it take to charge it once? For this question, as a master, let's analyze it today.

First of all, there are many models of electric vehicle batteries, including 48V, 60V, etc., but due to the implementation of the new national standard, there is a clear limit on the battery voltage. Therefore, we are going to discuss more about 48V electric vehicle batteries today.

Take the 48V20AH battery as an example, the average charging voltage is about 51.6V, and the amount of electricity that needs to be charged is 1.05 times of the discharged power. Therefore, it charges about 1.08 kWh for one charge (the amount of electricity consumed = average charge) Voltage * battery rated capacity * 1.05).

It should be noted here that there may be batteries with the same pressure but different capacity. Once the capacity is low, the power consumption will be relatively low. For example, the battery of 48V12AH generally consumes 0.65 kWh of electricity per charge. . Therefore, the greater the voltage and capacity, the more power is required for a single charge.

In addition, one point can be explained to everyone, after the electric vehicle battery is fully discharged, it can be fully charged within 8 to 10 hours, which means that its 48V20AH battery consumes about 0.1 to 0.13 degrees per hour, while 48V12AH. The battery consumes about 0.06 to 0.08 degrees per hour. It can also be seen that in fact, charging an electric car with a single charge is not as power-consuming as imagined.

Of course, the above is also completely discharged. In fact, when the electric vehicle battery power is lower than 30%, it needs to be charged immediately, which can prevent over-discharge and damage the electric vehicle battery. In addition, electric vehicles can not be charged with charging, because lead-acid batteries have a certain number of charge and discharge times, if you charge frequently, it will shorten its life.

In short, after fully discharging, the electric vehicle battery is charged, and it takes about 0.65 to 1.08 kWh for a full charge (taking a 48V battery as an example). For the user, when charging the electric vehicle daily, it is also necessary to properly control the charging time.


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