Theory + practice, easy to understand the principle, simple to understand, reasonable.
Is the hybrid a range extension or a plug-in hybrid?Today, it is still a plug-in hybrid, and most of the options may be extended in the next two years or so. However, it is important to note that the future range extension is very different from the current one.
Li Xiang, CEO of Li Company, publicly shouted: "China's own brands are still using multi-level DHT, and car companies will change to the extended range technology route in the next one or two years." And the domestic Geely and Great Wall bosses also responded in the air, "resolutely not using range extensions".
For automobile companies, it is an indisputable fact that the entry threshold for range extension is relatively low, and the high-speed fuel consumption is significantly higher than that of plug-in hybrid.
Whether you agree with Li Xiang's point of view or not, there are two points that everyone basically agrees with, Li Xiang is a top product expert and marketing master.
But why did Li Xiang stir up this topic every once in a while?In fact, it's a clever marketing ploy.
There is no doubt that the technical threshold for range extension is the lowest among hybrids
The plug-in hybrid is directly driven by the engine at high speeds, so that the efficiency is higher, and it can achieve about 95%. In order to make the engine at the highest efficiency in different speed sections of high speed, some manufacturers have developed a two-speed and three-speed mechanical transmission mechanism for direct drive.
Range extension is that the engine is only used to drive the generator to generate electricity, when driving at high speed, there is a loss in the power generation process, and there is a loss in the motor electricity, so the final achievement rate of the engine's power conversion to drive is more than 80%.
The high-speed fuel consumption of the extended range type is about 10% higher than that of the plug-in hybrid, which has been verified both theoretically and in practice.
However, plug-in hybrid has increased the gearbox mechanism, increased research and development costs, and increased manufacturing costs. It is necessary to have a dedicated transmission system team, which also needs to have experience in transmission development, and also needs to have reliable transmission manufacturing capabilities.
From the aspect of power control, the control complexity of the power system is increased. In terms of power control, it is necessary to coordinate the direct cooperation between the engine and the motor (the motor will intervene during acceleration), and also coordinate the smooth conversion of the working state of oil and electricity.
Lee thinks why totalStir up the debate between range extension and plug-in mixing
Why does Li Xiang always throw out the topic that range extension is the best every once in a while?
In fact, this is a very clever marketing strategy, and when everyone is arguing about this topic, Li Xiang has already achieved his goal.
Because, as long as there is still an argument, it seems that this is still a controversial issue, and most friends who don't know much about cars will naturally think so. Even friends who know some cars subconsciously feel that this is indeed difficult to determine.
In two years, there will be no need to discuss this issue. Because people's attention will shift to the pure electric range, charging speed, and intelligent driving of plug-in hybrids.
The development of battery technology has enabled the range of hybrid modelsDramatically increased
From the development speed of battery technology in the past two years, it is basically a step a year. Just a few days ago, NIO just live-streamed the battery life of semi-solid-state batteries.
The improvement of battery energy density makes it possible to greatly increase the power of the battery in the same position and space, thereby increasing the mileage.
According to Honda's statistics, plug-in hybrid models account for only 4% of the actual use of pure oil. Of course, this figure is achieved under the premise that the owner is always worried about charging in time and paying a certain amount of time for charging. In other words, the owner still has to pay a certain amount of extra energy and time.
When the pure electric calibrated cruising range of the hybrid can generally reach 300km, even if there is no home charging, there is basically no need for the owner to deliberately worry about timely charging, and the proportion of pure electric driving can be achieved.
The increase in charging speed has greatly reduced the proportion of pure oil used
800V high-voltage fast charging, which enables fast charging of one kilometer per second, and it is common to charge for 5 minutes to increase the range of 300 kilometers after two years. Even now, the new mid-to-high-end models do not dare to show up if there is no 800V high-voltage fast charging.
High-voltage fast charging stations will be covered soon. Huawei announced that it will build more than 20,000 high-voltage fast charging stations in two years, and with social forces, it can be said that high-voltage fast charging stations will be found in urban areas and high-speed service areas in many areas during the two years, more than gas stations.
People's one-way high-speed long-distance mileage occupies most of the cases within 300km, high-speed power consumption is relatively large, plus air conditioning, such mileage in the middle of the power is enough.
And people's habit in the 300km long distance almost must stop once in the service area for convenience and rest, this time is enough to replenish the full charge, without deliberately can do the whole pure electric driving.
The above changes people are no longer entangled in the high-speed fuel consumption of pure oil
When the proportion of pure oil driving is getting smaller and smaller, who cares about the increase in fuel consumption of pure fuel driving of the extended range.
Let's say a car travels 1 a year50,000 kilometers, calculated according to 10% of the fuel line, a year of fuel driving 1,500km, according to the difference of fuel consumption per 100 kilometers of 1 liter, it is also a difference of 15 liters of gasoline, 9 yuan per liter of oil, 135 yuan. That is, the range extender is used for more than 135 yuan a year.
When hybrid vehicles develop to such a situation, there is really no need for car manufacturers to work direct drive. Not to mention the extra R&D and manufacturing costs, even if the owner will pay more than 135 yuan for the maintenance of the gearbox in the future.
His range is not this range extension
The above analysis is the pure electric battery life, charging speed, and popularization of high-voltage fast charging stations in plug-in hybrid and extended range two years later.
Now the range extension can't be done, so it's the same range extension, and the concept is completely different.
As long as the brand image of the ideal is not affected by the low threshold of the range extender in the current two years, it has achieved its purpose.
Wrapping up
In the past two months, the intelligent driving of cars has suddenly exploded, and the technical realization has also advanced by leaps and bounds.
People choose a car almost put the ability of intelligent driving in front, the focus of car selection has changed greatly, and the difference in high-speed fuel consumption of hybrid vehicles is not a matter at all in the face of intelligent driving. Therefore, it is estimated that Li Xiang will throw out more topics of intelligent driving.
In terms of the realization of intelligent driving, the range extender has obvious advantages over the hybrid direct drive in the realization of intelligent driving because it has always been the structure of electric drive.