How much is the difference between the domestic electric cars from Tesla?

Chuanfu Wang once said that it was easy to make Tesla. Now that both Beiqi and BYD have broken through 400 kilometers in terms of cruising range, from the perspective of batteries and power systems, is the domestic electric vehicle really only a little distance from Tesla?

Both BYD and BAIC have already exceeded the 400km mark on their cruising range. It seems that it is not far from Tesla. So let's leave the autopilot, interior and multimedia system, just talk about the battery and power system, can the domestic electric car really surpass Tesla in minutes?

100 kilometers of energy consumption

Almost everyone will buy fuel cars to compare fuel consumption, but for electric vehicles, most manufacturers seem to have not even announced the energy consumption data, only announced the full battery life mileage. Is the electric car really the same?

Take BYD e6, the battery capacity is 82kwh, the cruising range is 400km, the average energy consumption is 20.5wh/100km; the average energy consumption of Beiqi EU400 is 18.1kwh/100km; and the power consumption of Tesla models75 is 100km. 156wh/100km. Considering that Tesla has an absolute advantage in size, space and power, it is not a little bit stronger.

Battery density ratio

For electric vehicles, the sheer weight of the battery is not a small problem. The heavier the battery, the greater the negative impact on acceleration, control and energy consumption. Therefore, the car companies are trying their best to increase the battery density ratio, and hope that the battery will be as light as possible while satisfying the endurance requirements.

At present, Tesla's battery density has reached 200wh / kg, while BYD only has about 110wh / kg, and Beiqi has only 130wh / kg. The specific weight value of the battery is rarely announced by the car companies, but the weight of the battery is not difficult to see from the BYD e6 Bitsla ModelS75 weighing 200 kg.

Charging speed

Many people think that the charging speed is determined by the charging pile, but in fact it is not, the charging pile power is high, if the battery cannot keep up, it will be forced to reduce the current by the BMS (battery management system). Therefore, the bottleneck of most electric vehicle charging speed lies in the battery.

Take the fastest charging method, Tesla models need 80 minutes to fully charge in the super charging station, while BYD e6 uses fast charging for 90 minutes, while Beiqi EU400 does not have fast charging, only can use slow charging 9-10 hour. Just look at the charging time, e6 and Tesla are not much different, but if it is the mileage / charging time ratio, the gap is still more than 30%.

To sum up:

Yes, cruising range is an important indicator of electric vehicles, but does not represent all of electric vehicles. Domestic electric vehicles are close to the industry benchmark in terms of cruising range, but it does not mean that the technology is close to the industry benchmark. It is hoped that domestic electric vehicles can improve their mileage while at the same time improving their technology. They can take into account more practical experiences such as handling, energy consumption and charging speed. Simply by adding batteries to get more subsidies, it is difficult to not be associated with fraudulent subsidies.

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