Recently, the case of the owner of the Great Wall Euler White Cat complaining about the battery life of the new car with false label has been searched on all major platforms. Sina Automobile also launched the weibo topic # Can you accept a discount on the battery life of new energy vehicles #. Judging from the comments of netizens, it has become an indisputable fact that electric vehicle range discount, some owners said that if they buy electric vehicles, they should discount the range by default by 30%, and some people gave suggestions to reasonably standardize the range standard of electric vehicles.
But in the comments, there was another voice that had to get our attention. One fan said he was not afraid of a discount on battery life, but was more worried about the false battery life label. Yes, the discount is not terrible, the virtual standard will rise to the level of deception, the nature is not the same.
Although electric vehicles have achieved very good development at present, there are still some urgent problems to be solved, such as battery range, charging convenience, battery safety and other aspects, which still baffle consumers. How to better solve these pain points, is the automobile industry to face the problem. Let's talk about some pain points of pure electric vehicles and how to better solve these pain points for users.
Pain point 1: false range, mileage is not enough anxiety
With the growing maturity of new energy vehicle technology, the range of many pure electric vehicles has exceeded 600km, but the range anxiety of pure electric vehicles is still troubling the owners.
Many owners say that when they buy a car, it is clearly marked with a endurance of 720km, but it is not good to actually drive 500km, and the winter endurance discount is more serious, and it is very good to drive 400km. Notably, one Tesla owner said that his 463km standard Tesla Model 3 has a real-time range of 288km based on current battery consumption with 94% of the battery remaining, or even less if the temperature is cool outside.
"You can calculate, on the basis of standard driving conditions, 20% off in normal times and 30% off in winter, which will be closer to your actual mileage." A sales staff member of a Tesla direct-sale store introduced to the customers in the store. There are also 4S shop sales staff said that the mileage marked by the manufacturer is the data calculated under ideal conditions, the actual road situation is complex and changeable, unless the speed is particularly uniform, otherwise it is difficult to achieve the mileage claimed by the manufacturer.
So, is the range of new energy models falsely marked? Actual endurance with the enterprise propaganda why so much difference.
First of all, we need to know exactly what is the comprehensive endurance of NEDC. The endurance range test of NEDC mainly simulates urban and suburban environments, accounting for 4:1 respectively. The maximum speed of these four urban cycles is 50km per hour, and the average speed is 19km.
Because there are many factors affecting the actual road conditions and environment, the test of NEDC is basically a bench test. If it is placed outdoors, considering the weather and wind resistance, the actual endurance of a pure electric vehicle will certainly be much lower than the bench test.
So one of the biggest criticisms of the NEDC is that it produces data that is sometimes so far from the truth that it can be used as a guide rather than an actual reference. Especially if you use the car, or the temperature is relatively low, then it is more to be on this basis, at least a 50% discount.
At present, the WLTP testing procedures implemented in Europe cover four operating conditions: low speed, medium speed, high speed and ultra high speed. The test average speed was 46.5km/h, and the maximum speed was 131.3km/h. Unlike NEDC, WLTP uses a non-fixed mode of gear change, but changes drivers to simulate real life conditions. External temperature, vehicle quality, gear state, rolling resistance, load, acceleration and deceleration and other factors are included in the assessment system, the authenticity of the overall test results are much higher than NEDC.
Therefore, in view of these situations, in Europe, including our country, new testing methods are being explored to make the testing methods more consistent with our traffic reality, so that the data will be closer to the real. On July 1 this year, the mandatory national standard "Fuel Consumption Limits for Passenger Vehicles" (GB19578-2021) organized by the Ministry of Industry and Information Technology was formally implemented, which proposed that the test conditions of traditional energy passenger vehicles and plug-in hybrid electric passenger vehicles would be switched from NEDC to WLTC before 2025.
It is understood that THE WLTC was jointly formulated by the European Union, Japan and the United States. Compared with the NEDC condition, the WLTC test condition is more stringent, which is divided into four cycles of low speed, medium speed, high speed and ultra-high speed, with corresponding durations of 589 seconds, 433 seconds, 455 seconds and 323 seconds respectively. The corresponding maximum speed is 56.5km/h, 76.6km/h, 97.4km/h, 131.3km/h, and different operations such as stopping, braking, and rapid acceleration are set. Rolling resistance, gear, weight and other factors of the vehicle are also integrated into the test. Unlike NEDC test road conditions and People's Daily driving conditions, WLTC test method is closer to consumers' daily driving habits, and the test mileage is more real.
I believe that in the next few years, with the promotion of the new WLTC test method, the actual range of new energy vehicles will be more and more close to the enterprise publicity, but also to avoid the problem of the imaginary range of many new energy vehicles.
Pain point 2: charging is difficult and waiting time is too long
One of the hottest topics to discuss this year's National Day travel is the charging waiting problem of pure electric vehicles in the expressway service area. A new energy car owner, driving an electric car on the way home to replenish the electricity encountered problems. The whole process is only an hour to charge the car, but the queue was four hours, vivid staged a "lost in the road" drama.
As the range of electric cars improves and the number of charging piles increases, more and more people like to drive electric cars for long trips. However, "charging for one hour, waiting in line for four hours." Happened in the new energy car this scene, once again sounded the alarm to the industry, why intensive construction of charging pile, in the holiday will appear a pile hard to find?
Solved the range anxiety, and ushered in the charging anxiety. Charging anxiety mainly lies in the long waiting time for charging, which is not as convenient as refueling in a fuel car, which can be done in a few minutes. This also makes a lot of car owners more headache, especially when they travel on holidays or have something to worry about, they will be particularly anxious. Although super fast pile filling appears at present, it is not suitable for all models, and the charging cost is relatively high, which also discourages some new energy owners, resulting in many super fast pile filling in idle state and unbalanced resource matching.
Data show that as of August this year, China electric vehicle Charging Infrastructure Promotion Alliance member units reported a total of 985,000 public charging piles, the cumulative number of national charging infrastructure is 2,105,000. By contrast, the number of neVs in China reached 6.78 million by the end of September, with 1.87 million newly registered so far this year, nearly 1.7 times that of the whole of 2020. That is to say, on average 3 new energy vehicles can only have 1 charging pile, the proportion is seriously insufficient, which also restricts the development of new energy vehicles.
So domestic charging pile construction needs to work harder to just go, but this does not mean frantically on road road, highway and construction of supporting facilities, can charge the battery by big data distribution equipment, highway, after all, not every day so busy with eleven, Spring Festival, the holiday time at a gas station and charging pile are oversupplied.
In fact, in order to alleviate the problem of long waiting time for charging new energy vehicles, automobile companies have launched many technical solutions, such as electric changing service of NIO And super charging piles of other automobile companies, which can solve charging waiting anxiety to a certain extent.
From the present point of view, super fast charge almost all car enterprises began to promote. Gac Eon has launched super-speed batteries and A480 supercharger piles. Xiaopeng Motor has announced the construction of the first 11 high-speed supercharging stations on the highway. The first charging stations in operation have an output power of 180kW, which can quickly supplement the driving range for Xiaopeng owners. In addition, NIO has more than 200 brand supercharging stations and 350 brand changing stations nationwide, making it the brand with the largest number and the fastest construction speed among new car manufacturers.
There is also the krypton 001 launched by Krypton Auto, which adopts 800V high voltage system and supports high power DC fast charge, from 30% to 80% of the time, only takes 25 minutes; It also provides a 360kW pole charging pile, which can charge for five minutes and have a range of 120km.
In addition, geely, Changan, Audi, Volkswagen, BMW, PSA and Hyundai and other new energy vehicle enterprises have declared the local super fast charging, realizing the super charging speed of several hundred kilowatts. Therefore, from a technical point of view, it is not difficult for new energy vehicles to achieve fast charging, and I believe that there will be a large number of supporting facilities and products in the last two years.
In addition, we can make full use of the advantages of the Internet, for example, in the intelligent interactive system, into the perception and deployment of energy supplement facilities. By powerful data information support, the on-board system can according to the rest of the vehicle range, recommend the perimeter of the charging station facilities, spare charging pile, and charging more detailed information, such as the waiting time, the current vehicle charging situation and so on dynamic information, timely to give to the driver of the vehicle, in which there are accurate predictions at the same time, Reasonable suggestions are also given based on big data analysis. At present, many map navigation products have added this function, if connected to the vehicle-machine system, further refine the data, I believe that it will also largely solve the problem of waiting for charging.
Therefore, I believe that with the development of new energy technology, charging waiting anxiety will be greatly alleviated, and there will no longer be "charging for one hour, waiting for four hours" predicament.
Pain point 3: Worrying more about battery safety than battery life
There are numerous cases of electric vehicle battery fire. According to incomplete statistics, there were a total of 72 new energy vehicle fire accidents in 2020, involving at least 25 brands of vehicle enterprises and 38 different models, including passenger cars, buses, trucks and many other models of different use. According to a car owner description, when the vehicle in the road, the chassis suddenly issued a "bang" sound, the dashboard showed that the vehicle fault, at the same time the vehicle began to smoke, then burst into flames.
Electric vehicles fire than traditional fuel vehicles, when the electric vehicle encountered a severe collision, the battery may have serious thermal control, serious fire and even explosion in a few seconds, so the electric vehicle fire is more terrible than fuel vehicles, which is also the most worrying problem for consumers.
Now, industry insiders say that the ultimate goal of new energy vehicles is not to burn or explode, which is the only way to ensure the complete safety of consumers. And the safety of power battery has become a top priority, many car companies have carried out more in-depth technical exploration in the safety of power battery.
In addition, in the safety protection of power battery system, enterprises should gradually establish an effective safety design specification for themselves, to constrain the development goals and processes of different products. If possible, the establishment of internal standards should be promoted gradually.
At present, there are roughly two directions for the research on the power battery of new energy vehicles. One is to continuously strengthen the safety performance of the liquid battery and reduce the thermal runaway of the battery to the minimum possibility through new technologies. On the other hand, solid-state batteries are safer than liquid batteries. While maintaining their safety, solid-state batteries may be applied to new energy vehicles by constantly improving their power density.
At present, automotive companies have made breakthrough progress in the safety of power batteries. Wei to the car was first proposed the power battery "three horizontal three longitudinal" security architecture, will be "cell and module, battery pack" combination "prevention, control and remedy" batteries in the hard shell, the biggest advantage is safety, and internal tell from the principle, the probability of thermal runaway in itself is small, and electronic control is also easier; Aluminum and stainless steel shells are also harder for greater crash safety.
In addition, BYD, GAC, the Great Wall for battery safety, also have their own unique secret. Byd launched the "blade" battery, the use of lithium iron phosphate, better thermal stability and safety, the core directly arranged into the package, improve the structural strength of the battery pack, needle test does not smoke does not fire results also further prove the safety.
Gac's magazine battery adopts mesh nanopore insulation material and high-temperature shell design, so that each cell has its own safety compartment, improving the overall safety of the battery. It is worth mentioning that gaC magazine battery adopts ternary lithium, and it is also the first ternary lithium battery to pass the needle test, which is very commendable.
Highlight the Great Wall of dayu battery technology mainly reflected on the heat conduction, when after thermal runaway, the evacuation, not blocking the working principle of the limit thermal runaway in minimum range, with the special design of heat convection channel, for example, two-way between each module in flow and heat flux distribution, truly no fire, no explosion, make batteries safer.
Power battery as the drive of new energy vehicles, safety risks are greater than fuel vehicles, and the battery and electronic control system is its core components, so this aspect of safety problems can not be ignored.
Conclusion: Although the current new energy vehicles ushered in the outbreak period, but still in the continuous exploration stage, many people do not have an objective understanding of new energy vehicles, coupled with excessive publicity of enterprises, also affects the judgment of consumers to a certain extent. However, problems such as battery life and charging anxiety of new energy vehicles and battery safety will be solved over time, which is also a process that the development of new things must go through. In the near future, people will not only be able to drive electric cars without worrying about battery life, but also about battery safety.
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