PK Tesla, what is the difference between domestic electric vehicles?

Recently, the hardware has invented "The spring of electric cars is coming?" After everyone reacted positively, why not carefully compare the popular Tesla and the domestically produced electric vehicles that have already been commercialized. Driven by factors such as rising oil prices and rising environmental protection requirements, the commercial window of electric vehicles has been opened; the franchise of special license plate channels and government subsidies in the background of limited purchases.

As one of my peers said, if you haven't seen a pure electric car a few years ago, perhaps because they are mostly walking in test areas of harsh environments, they are now showing up.

But how many people can accept electric cars? It is a problem. Domestic users have shown two extreme attitudes toward electric vehicles. One is to bring products like Tesla to the sky, and the big players in the tech world are eagerly amazed; marvel at Tesla’s thinking about cars with the Internet. Recreated to create an oversized smartphone.

The other is the mistrust of domestic electric vehicles. We can compare the various aspects of the domestic electric vehicles and the foreign electric vehicles represented by Tesla. The value is not trustworthy in daily use; here first Putting the mentality down, only from the aspects of price, practicality and reliability, only the electric car is on the road, and it is popular to talk about higher requirements. So now and Teslaby's Internet thinking is to hit the stone.

At present, most of the pure electric vehicles that you can buy in the domestic market are from domestic brands. Foreign brands only have GM and new Tesla, and foreign representatives are really not very good.

Overseas car companies have been pushing electric vehicles for many years, such as Nissan's Leaf, BMW's i3/AcTIve E/MINI E, and GM's mass-produced electric vehicles Volt, but few of them have entered the domestic market. Fortunately, Tesla is here. The first batch of users who booked cars in China last August can mention the car in April. Together with the first launch of the domestic joint venture, the mass-produced electric car Sail SPRINGO, found these two representatives.

There are many representatives of domestic electric vehicles. There are more than 10 domestically produced vehicles entering the new energy vehicle catalogue of the Ministry of Industry and Information Technology. The brands involve BYD, BAIC, SAIC, JAC, Qichen, etc., and three types of products are available in the market. .

1, BYD E6

2, SAIC Roewe E50

3. BAIC E150ev

Electric car users are most concerned about these aspects: First, the mileage is not long? Second, is security enough? Third, the cost of one-time investment is not high? Fourth, the later maintenance troubles are not troublesome, etc., the following parameters are put to do a comparison (collecting such parameters is absolutely an individual force).

From the parameters and prices, we need to see that the positioning difference of several cars is very big. Tesla is a wealthy newcomer who wants to try new technology. All aspects of the parameters are top-level. Sail SPRINGO is for home travel, the same positioning is the Roewe E50, which is an A0 class car. The Beiqi E150ev is designed according to the ordinary A-class car. It is suitable for the home or rental market. The BYD E6 model is larger, and the price of more than 300,000 is not cheap. It is for business and public use vehicles, and now runs the most BYD E6 on the road. It is a taxi in Shenzhen.

Life-saving domestic car is enough

It can be seen that for the first few problems, the battery life has been able to reach more than 120 kilometers, of course, this is related to the driving conditions, such as Sail SPRINGO, the comprehensive working conditions can travel 130 kilometers, if the average 60 kilometers can be opened Open to 200 kilometers.

More than 100 kilometers of battery life in the city is not a problem, in addition to Tesla's "metamorphic" cruising range, the joint venture of Sail and three other domestic electric vehicles are similar, BYD E6 can also reach 300 kilometers.

* charging time and method

Another concern with battery life is the charging time. There are several different standards depending on the current you charge. For example, Tesla, if you use the 80A fast charger, you can charge 17.6kWh per hour, which is 17.6kW, and can run 80~100km. However, if you use the ordinary household 220V/10A power supply, you can only charge 2.2kWh per hour, which is full of 40 hours. When arranging the data, it is based on the normal 220V/10A current. This is the bottom line value. Basically, each model supports higher current and faster charging.

There are two charging standards that can be used in China. The national grid charging pile, the other is the 220V ordinary charging pile. The universal 220V power supply current has 10A/16A two turns. Except for the battery capacity of Tesla and BYD E6, the charging time of other models is 6~8 hours. The public charging pile of the State Grid is 220V/36A, charging 7.9kWh per hour, which is 2~3 times of the household charging speed. The public charging pile satisfies the need of fast charging, and the self-use charging pile of the community can be slowly charged at night.

Even with the charging grid of the State Grid, Tesla is also full of more than 10 hours. Tesla is not dominant in domestic charging time. Because of its high battery capacity, its ultra-high-speed charging technology has some obstacles in domestic use. .

Battery safety

Another is safety, leakage, spontaneous combustion, explosion. This is a problem that everyone cares about when using a pure electric vehicle with a large number of batteries. At present, most domestic electric vehicles use lithium iron phosphate batteries. The thermodynamically and structurally stable type of lithium iron phosphate material is the highest of all current cathode materials.

Therefore, the energy density of lithium iron phosphate batteries is certainly not as high as that of some batteries, but the safety is much better than them.

However, compared to Panasonic's specially customized NCA series (nickel-cobalt-aluminum system) 18650 lithium cobalt oxide battery, which consists of more than 7,000 batteries with a single capacity of 3100mAh, which is also proud of Tesla. The battery management technology has also achieved the highest level of security. This battery technology is more mature than the energy of the electrode material (the amount of electricity emitted by the electrode material participating in the electrode reaction) is higher than that of the lithium iron phosphate battery used by BYD.

Another fact can be left to prove that lithium iron phosphate is electromagnetic or reliable. You can see the example of the Volt. Volt is a mass-produced electric vehicle in the United States. It started with the three-in-one material battery that was cooperating with LG, and later appeared because of Volt. The cause of the fire accident. The use of iron phosphate batteries began, and the domestically launched Sail SPRINGO also used iron phosphate batteries.

Overall, battery safety, in terms of materials, the stability of lithium cobalt oxide used by Tesla itself is not necessarily higher than that of lithium iron phosphate batteries used in other models, but after Tesla's special treatment, rigorous testing, Also very reliable. The safety of electric vehicles needs to be verified, but existing manufacturers have reached the highest level that can be achieved at present. Collision testing is also required in the Ministry of Industry and Information Technology.

Preliminary input cost

One fact that cannot be avoided is that electric cars are still too expensive now, and it is not said that Tesla itself is positioned as a "luxury car" with a price of more than 700,000. Other civilian electric vehicles, the price is not civilian? The official guide price is at 200,000+.

However, in the big cities such as North, Shanghai, Guangzhou and Shenzhen that are now promoting electric vehicles, there are subsidies for new energy vehicles. However, depending on the region, the policy difference is quite large. For example, BYD E6 can enjoy a subsidy of 120,000 in Shenzhen and only 60,000 yuan in other places. According to different situations, the general subsidy fee is about 100,000 yuan. Therefore, the actual investment in purchasing a pure electric vehicle is roughly equivalent to the investment of an A-class family car (E6 and Tesla are relatively more expensive).

However, Tesla has not yet obtained this subsidy. In other words, who will buy Tesla who cares about this subsidy?

After-sales and post-investment

This is the initial input cost, and the other is the late input cost. This is precisely the advantage of pure electric vehicles. For the new energy vehicles, I can see from the comparison of these cars, the general manufacturers are different from the battery and the car after the warranty period.

Moreover, the battery life is generally longer than the vehicle life, such as the Beiqi E150 EV, the vehicle is guaranteed for 3 years 60,000 kilometers, and the battery is guaranteed for 8 years. This is not a big difference between domestic and foreign brands.

Intelligence level

Automobile intelligence is the future trend, and Tesla wants to break through several streets of GM and China. All control of Tesla's entire car can be done on the 17-inch capacitive touch screen, and the specially developed system control experience is very good. Moreover, this system can be upgraded and upgraded, and it can also be remotely viewed and operated on the mobile phone. Therefore, Tesla is completely based on the thinking and experience of the mobile Internet. It is no wonder that Tesla is the largest number. "mobile phone".

There are some other attempts in other models, but none of Tesla has done it thoroughly. For example, BYD has also realized the remote viewing of vehicle data by mobile phones and can carry out some remote control. The versatile OnStar is an intelligent system that has been developed for many years. Compared with the previous paragraphs, the Roewe E50 and the Beiqi E150 ev are somewhat more intelligent.

to sum up:

Based on the above points, domestic pure electric vehicles and foreign-funded pure electric vehicles, in addition to facing luxury cars like Tesla, domestic electric vehicles in the range of cruising range and safety settings, luxury features are inferior In addition, it has reached a practical level, and security has also been strictly demonstrated.

Although Tesla is a luxury car in terms of price, it has indeed set a benchmark for electric vehicles in terms of safety and intelligence. It is a domestically-produced pure electric vehicle that needs to be followed up.

I specifically consulted some industry people. Electric Beijing is a non-governmental organization that promotes the sharing of electric car rentals in Beijing. I talked to their responsible persons about several relationship issues. The other party said that domestic electric vehicles are equipped with a leakage protection system. The battery can be treated to withstand high temperature and high pressure. Leakage or spontaneous combustion explosion will hardly occur unless there is a possibility of a major accident. In addition, there are corresponding requirements for the battery capacity, vehicle quality, charging standards and supporting facilities of pure electric vehicles.

Compared with ordinary foreign electric vehicles such as GM, the domestic pure electric vehicles have the same range of life, the safety of the battery materials used, the charging time, and the years of after-sales warranty.

On the contrary, domestic pure electric vehicles are more favored in the policy of financial subsidies. If they are early adopters, they can choose domestic pure electric vehicles. In addition to government subsidies, now like Guangzhou and Beijing, it is also a good opportunity to provide green channels to pure electric vehicles in the environment of car purchase.