I often see in the background that some netizens complain that the electric car they bought has a big gap with the official mileage. Is that the case? How far can a 48-volt electric car go? Why is the cruising range different from the official propaganda? Today, the author uses real data to tell you the answer.
The 48-volt electric vehicle is the new national standard electric vehicle
According to the "Electric Bicycle Safety Technical Specifications", the 48-volt electric vehicle is a new national standard electric vehicle. The overall mass of this model is not more than 55 kg, the speed is less than 25 km/h, the battery voltage is not higher than 48 volts, and the motor power is less than 400W. At the same time, it has a pedal function and is called an electric bicycle.
Since the new national standard electric vehicle is limited by weight, the new national standard electric vehicle will not use large-capacity lead-acid batteries, generally 48V12Ah or 48V20Ah lead-acid batteries, and some other high-end models will use manly battery lithium batteries, which are currently on sale. The new national standard electric vehicles generally use manly battery 48V12Ah, 48V20Ah, 48V24Ah and 48V30Ah lithium batteries.
8-volt electric vehicle official publicity test method for cruising range
Many netizens say that the cruising range officially advertised is deceptive, because in the actual riding process, they simply cannot reach the cruising range officially advertised. The mileage reaches 150 kilometers, but only half of the battery life or even less during the actual riding process, what is going on?
In fact, the official cruising range is notarized, and there is no factor of deception. This is because the cruising range of the official test has certain conditions, and even the conditions for the official cruising range test are very harsh. During the test, there will be specific requirements for the tester's weight and height, and at the same time, it will also require a uniform driving speed, and there will also be specific requirements for the driving speed. There are even specific requirements for the test environment temperature and wind speed. It can also be said that the test environment It is an ideal state, and in the actual use of electric vehicles, we cannot reach the official test environment, so there is a discrepancy between the official advertised cruising range and the actual cruising range.
How many kilometers can the theoretical cruising range of a 48-volt electric vehicle run?
Since the official test environment is very demanding, the official mileage data can only be used as a reference and has no practical significance, so how do we know how far a 48-volt electric vehicle can run? In fact, we can perform corresponding calculations based on physical knowledge, and can obtain the theoretical cruising range of a 48-volt electric vehicle.
We know that the 48-volt electric vehicle is the new national standard electric vehicle, then its maximum speed is 25 km/h, the maximum motor power is 400W, and the maximum 48V20Ah lead-acid battery can be configured, then we can calculate it according to the formula: cruising range = Speed*(battery voltage*battery battery)/motor power
Theoretical cruising range is: 25*(48*20)/400=60km
That is to say, the new national standard electric vehicle of 48V20Ah has a theoretical maximum cruising range of 60 kilometers, which may be less than this mileage in actual use.
Summarize
Electric vehicle manufacturers officially publicize the cruising range, which is the result obtained in a very harsh test environment. However, in the process of actually using electric vehicles, we cannot reach the official test environment, so there is a difference between the cruising range of electric vehicles and the official cruising range. However, we can calculate the maximum cruising mileage of electric vehicles through physical knowledge, so that when purchasing electric vehicles, we can be aware of them, so as not to be unable to meet our own needs after purchasing electric vehicles.
