Five shortcomings of electric semi trailer to be improved

With the continuous improvement of domestic air pollution control intensity in recent years, heavy diesel vehicles have gradually become the focus of environmental protection departments, especially in the field of passenger vehicles, the coverage of new energy is more and more extensive, almost every brand involved in the research and development of new energy models, heavy diesel vehicles have also begun to develop towards the direction of electric drive. So, electric semi trailer into the sight of owners.

Electric semi-trailer refers to the semi-trailer of the tractor is electric drive in the form of electric drive instead of fuel drive.

After the adoption of electric drive, the operation cost of the vehicle is definitely reduced, especially in the current fuel price continues to rise under the premise, the cost of electricity consumption is far lower than the cost of fuel consumption, economic benefits are very obvious; In addition, in terms of emissions, because of the replacement of fuel drive, vehicles can basically achieve zero emissions, and the environmental benefits are also very considerable. In addition, semi-trailer electric drive can also achieve noise reduction, convenient shift, vibration reduction, greatly improve the driving environment of the owner, to a certain extent can also protect goods, reduce goods damage.

Compared with oil semitrailers, electric semitrailers also have an advantage, that is, vehicle data is easier to collect and upload, which can further improve technical services, optimize energy supply in the field of transportation, and realize the application of unmanned technology in closed scenes such as mines and ports.

No matter from the above which level, the electric semi trailer seems to have incomparable advantages of fuel vehicles, in line with the development trend of the industry. However, the electric semi-trailer has been on the market in 2017 or so, why not achieve large-scale application? Mainly because of the following five aspects:

1. The vehicle is heavy.

In general, electric semi-trailers are generally heavier than the same type of fuel semi-trailers, mainly because electric semi-trailers need to load more batteries. Because the semi-trailer is different from the passenger car, its main role is transportation, the endurance requirements are relatively high. Take an electric-driven 6X4 tractor as an example, its battery weight can reach about 3t, increasing the vehicle's self-weight to some extent.

2. Slow charging speed and low charging efficiency.

The charging speed of electrically driven semitrailers has long been an industry problem. Generally speaking, an electric semitrailer uses a slow charge, it takes about a few hours to fill; If the fast charging method is used, it will take at least nearly an hour to be filled, and there will be some damage to the battery, which is slower than the efficiency of going to the gas station.

3. Inconvenient charging.

As we all know, at present, even new energy passenger cars in many cities are not particularly convenient to charge, especially on expressways, there are almost no charging piles, not to mention new energy commercial vehicles, which to a large extent leads to transport owners are not willing to buy electric semi-trailers, especially middle and long-distance owners.

4. Limited endurance.

In order to extend the endurance of the electric semi-trailer, more batteries are used in the vehicle design, but due to the low energy density of the battery, the range of the heavy semi-trailer to a large extent can not meet the needs of long-distance transportation.

5. The cost of buying a car is high.

As a newly launched model, although electric semi-trailer has limitations in many aspects, its price is still much higher than that of ordinary fuel semi-trailer, which also makes many owners give up the idea of buying.

The above five reasons, to a large extent, affect the popularity of electric semi-trailer.

Objectively speaking, if it is used for inter-city short-distance transportation, or fixed logistics shuttle buses, electric semi-trailer is more suitable, but if it is medium and long-distance transportation, or heavy cargo transportation, electric drive is more limited to a certain extent.

In this case, hybrid semi-trailers appeared one after another. Compared with pure electric driven semi-trailer models, hybrid semi-trailer combines new energy with fuel power, such as petrol-electric hybrid semi-trailer, plug-in hybrid semi-trailer and extension-range electric semi-trailer. Electric drive is used when charging is convenient and sufficient, and fuel drive is used when charging is difficult in high-speed environment. Although such a model can make up for some of the lack of support of pure electric semi-trailer, but can not get rid of the dependence on fuel, energy saving and emission reduction is not ideal, the technology is more complex, the price is high, whether to meet the needs of owners still need to be verified by the market.

However, whether it is fuel semi trailer, electric semi trailer, or hybrid semi trailer, lightweight is a common pursuit of the trend. The selection of lightweight trailer axle is one of the important ways to achieve vehicle lightweight, according to the DARO Group's calculation data, the use of DARO's new disc brake lightweight axle, the average weight can be reduced by about 15% than the ordinary trailer axle, not only can reduce the weight of the body, but also help to save fuel, reduce tire damage, reduce comprehensive vehicle cost.