An accident nearly killed Xiao Zhao.
That day, he was speeding down the highway in the electric SUV he had just bought, ready to get home before dark.
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But just as he was about to get off the highway, the vehicle suddenly lost power, and under the emergency braking, the car still hit the guardrail on the side of the road. Fortunately, Xiao Zhao reacted in time and did not cause more serious consequences.
Subsequent inspection revealed that the power was interrupted due to the depletion of the battery's capacity. This made Xiao Zhao couldn't help but be afraid. Obviously, after being fully charged, the vehicle mileage shows that there are still 100 kilometers, how can it completely run out of power when it is only 10 kilometers away from the destination?
The accident undoubtedly cast a shadow over Xiao Zhao's tram buying experience. He realized that when buying an electric vehicle, it is not only about the cruising range, but also about more factors.
Two
For tram buyers, range is one of the most concerned indicators, and it can even be said to be the most critical factor. After all, the biggest pain point of the tram is that it takes much longer to replenish energy than to refuel, and if the range cannot meet the daily needs, it is undoubtedly a big problem for the car experience.
Therefore, when major car companies promote electric cars, they will invariably emphasize the range data of their own models in an attempt to attract the attention of consumers. Some even take some "cleverness", such as the ultra-long range tested under the most ideal conditions, which makes people involuntarily think that this is the standard performance of the vehicle.
But as mentioned at the beginning of the article, Xiao Zhao's experience, just staring at the range data to buy an electric car often gets unexpected results. Because the cruising range is affected by many factors, the actual use experience is easy to have a big gap with the manufacturer's publicity.
So in addition to the range indicator, what else should be paid attention to when buying an electric vehicle? Let's sort them out one by one.
Three
The first thing to pay attention to is the overall technical level of the tram power system.
As we all know, electric vehicles have one more power battery system than traditional fuel vehicles. The performance of this system directly determines the power output and energy utilization efficiency of the whole vehicle, which in turn affects the cruising range.
In general, the larger the battery capacity, the longer the range. However, it is not a simple linear relationship, and factors such as the chemical composition, management system, and thermal management scheme of the battery will have a significant impact on the battery life.
For example, models using lithium iron phosphate batteries often have lower endurance than ternary lithium batteries due to their lower energy density and higher thermal management requirements. Ternary lithium batteries are divided into different chemical formulas, among which the proportions of nickel, cobalt and manganese in ternary cathode materials are different, which will also lead to differences in safety, energy density and cost.
Another example is how well the battery management system is optimized. An advanced battery management system that can comprehensively monitor the working status of the battery, accurately control the charging and discharging process, and maximize the performance of the battery itself, thereby improving the cruising range of the vehicle.
In addition to the battery system, the motor and the associated power electronics are equally important. The higher the efficiency of the motor and the smaller the conversion loss, the more it can improve the endurance performance of the vehicle. In addition, whether the heat dissipation scheme of the motor is optimized will also affect its long-term performance.
In short, the technical level of the power system of an electric vehicle is the key to determining the cruising range. As a consumer, it is important to understand the manufacturer's specific solutions in these aspects when purchasing, and not just rely on the final published battery life data.
Four
In addition to the powertrain, the overall chassis and body design of the electric vehicle are also worth paying attention to.
As we all know, electric vehicles have a low center of gravity, which is conducive to improving the stability of the body to a certain extent. However, if the chassis structure is not properly designed, it will still affect the driving stability. Therefore, we need to pay attention to whether electric vehicles use front and rear independent suspension, and the specific type of suspension.
Generally speaking, the suspension layout of the front double wishbone and the rear five-link can better cope with various road conditions and improve the handling and ride comfort of the vehicle. Of course, this advanced suspension solution will also be relatively expensive, but it is a must for a high-end electric vehicle.
In addition, the rigidity of the vehicle is also a point that needs to be paid attention to. The more rigid the body, the better it can protect its occupants in the event of an impact. Some high-end electric vehicles will use a large number of aluminum alloy and carbon fiber materials, which can not only reduce the weight of the vehicle, but also improve the rigidity performance.
At the same time, the aerodynamic design of electric vehicles is also crucial. After all, poor aerodynamics increase drag during driving, which increases energy consumption and shortens range.
Therefore, when purchasing electric vehicles, in addition to the power system, we should also take into account the design level of the chassis and body, which will have an important impact on the comprehensive performance of the vehicle.
Five
In addition to the hardware level, the software system of the electric vehicle is also a key part of the work.
As we all know, compared with fuel vehicles, electric vehicles have greater programmability in terms of driving experience and energy management. Therefore, the optimization level of the on-board system software directly determines the actual user experience.
First of all, the human-computer interaction design of the in-vehicle information system should be simple and easy to use. A system with complex operations and a confusing interface can easily confuse users and fail to take full advantage of its features. The ideal in-vehicle system should have a clear distribution of functions and intuitive controls, so that the driver can quickly get started and master it easily.
Secondly, the level of implementation of intelligent assisted driving systems is also critical. Hyundai electric car general
It is equipped with a variety of advanced driver assistance features, such as adaptive cruise control, lane keeping, automatic parking, etc., and the performance of these systems directly affects the car experience.
Furthermore, the intelligence of the battery management system is equally important. An excellent battery management system can not only comprehensively monitor the battery status, but also intelligently adjust the charging and discharging strategy according to driving habits, weather conditions and other factors to maximize the battery performance and improve the range. Six
Finally, we also need to pay attention to the safety performance of electric vehicles. This is an important indicator that consumers must not ignore when buying a car.
Compared with gasoline vehicles, electric vehicles have different safety risks. For example, when the battery overheats, short-circuits and other faults, it may cause a serious fire accident and bring a huge threat to the lives of the occupants in the car. Therefore, the reliability of battery fire and explosion-proof measures is particularly important.
Some high-end electric vehicles use steel or carbon fiber battery compartments, which can effectively isolate the battery from the cabin and reduce the risk of fire spread. In addition, the intelligent monitoring function of the battery management system can also detect abnormal situations in time and take corresponding protective measures.
In addition to battery safety, the passive safety performance of electric vehicles cannot be ignored. An electric vehicle with a high body rigidity and a complete airbag configuration can better protect the occupants in the event of a collision. Therefore, we should also pay attention to these indicators when purchasing.
In general, the safety of electric vehicles is a key point that consumers must carefully consider when buying a car. After all, once a safety accident occurs, it will not only bring loss of life and property to car owners, but also may affect the social image of the entire electric vehicle industry. Therefore, it is very important to choose an electric vehicle with excellent safety performance.
Seven
To sum up, when buying an electric vehicle, we should not only focus on the cruising range, but also need to comprehensively consider many factors such as powertrain level, chassis design, software system optimization, and safety performance.
Although these factors are not as intuitive as the cruising range, they directly determine the overall performance of electric vehicles. Once these key points are overlooked, it is likely to encounter unexpected problems in actual use, which will affect the car experience.
Therefore, when buying electric vehicles, we must be vigilant and not easily confused by the manufacturer's publicity. It is necessary to take the initiative to understand the key indicators of the model, and verify it from multiple sources, and comprehensively evaluate the advantages and disadvantages of the candidate model by consulting relevant evaluations, owner feedback and other information, and finally make a rational choice.
Only in this way can we buy a high-quality electric car that really suits us and enjoy the ideal driving experience.
Finally, readers are also welcome to leave your experience in the process of purchasing electric vehicles in the comment area, and share them with each other. I believe that these valuable experiences will definitely be helpful to those who are ready to buy electric vehicles in the future.
#买电车需深思: Key considerations beyond range