Posted 2020-10-12 00:00:00 +0000 UTC
@Wen Pei has been paying attention to all electric for a long time. You have been exposed to many cases. I want to know how about the new energy vehicles (pure trams) bought 4 / 5 years ago? How much attenuation? Can you still use it normally? Mr. postman, you are a letter. I'm a postman. I'm saying that one of your major concerns about pure electric vehicles is the battery attenuation. After all, the cost of power battery is relatively high. Once the attenuation reaches a certain degree, it will have a great impact on both the use and the hand. What kind of battery attenuation did the new energy vehicles have a few years ago? In 2019, the study pointed out that geotab, an overseas company, published a survey data on how the battery of electric vehicles degenerates over time by collecting the use data of nearly 6000 vehicles in the world, and reached the conclusion that the average annual power consumption of pure electric vehicles will decline by 2.3%. Among them, the battery capacity of model s of 2015 model s has an average annual decline of 2.3%, while the battery capacity of leaf of 2015 model s has an average annual decline of 4.2%. The former uses active battery temperature control system, while the latter uses passive air cooling system. As for the domestic models, there is no systematic investigation at present, but the vast majority of manufacturers provide their new energy pure electric vehicles with a warranty of no more than 20% of the battery attenuation of 120000 km in 8 years. However, many consumers clearly feel that such a commitment is not enough, so the new version of the three guarantees policy is in the process of being revised, and will be adjusted in terms of new energy vehicles, return and replacement conditions, punishment amount, etc. For the battery attenuation, enterprises are required to clearly mark the attenuation limits and corresponding test methods of the battery of the new energy vehicle when selling the pure electric driving mileage to consumers. "Enterprises should tell consumers how much the battery capacity of the car decays in one year and two years, and let consumers have an understanding of the basic performance of the car before buying it." Therefore, consumers do not need to worry too much about the battery attenuation. In addition, the current electronic control system is becoming more and more mature, which is certainly not the same as the previous years. @To change the reality of building owners, what are the best plug-in hybrid cars to buy between 100000 and 150000, and when to buy them in recent two years, such as quality, battery, etc? Please give me a suggestion! thank you! Wait for a BKB fastest take out FC. It's quite suitable to buy this year. This year, there are quite a lot of stimulus policies, and the overall preferential range is very large. If there is a demand for cars, you can buy them as soon as possible. As for the model, I'd like to recommend two models. The first one is the new Benyue Epro, which just came into the market a few days ago. The price after subsidy is 1258-149800 yuan, which perfectly meets the price expectation. The Benyue Epro is upgraded from the Benyue PHEV. Based on the Geely BMA infrastructure and p2.5 hybrid technology architecture, it is a plug-in hybrid system equipped with 1.5td + 7dcth + motor, with a capacity of 11.3kw · h and pure electric endurance of 62 Km, 100km, 6.9 seconds. Security configuration and comfort configuration are also rich. In combination with such a price, this can be taken into account. I recommend leading PHEV for the second model. It's worth considering if you like joint-venture cars. Although the price is a little over 15 a little, the pure electric commuter distance is longer. After being subsidized by leader PHEV, the price range is RMB 1578-178800, and three configurations are launched, all of which are equipped with 1.6L hybrid power system, with the maximum engine power of 77KW (105ps), pure electric endurance mileage of 85km, warranty of three core components of 150000 km for eight years, warranty of the whole vehicle of 100000 km for three years and free flow service for three years. Both models are worthy of consideration. @Jun Hao @ Meng Meng's father asked me, said slow charging to protect the battery, then need to use 10A or 16a, or even 5A to charge it? But there is also a saying that lithium ions move slowly and deposit a lot of them on the negative electrode. It also affects battery life. How about 32 16 10 or 5 for slow charging? thank you. Take a bite of cucumber. It's very fragrant. There are too many factors affecting battery life, such as cut-off voltage, charging current, ambient temperature, etc. For example, under a certain charging cut-off voltage, the smaller the charging current is, the more lithium is removed from the battery. Although the usable capacity is higher after charging, the more unstable the structure of the battery is. However, although the amount of lithium is small and the structure is stable, the usable capacity is Less, will affect the final cycle life naturally. In addition, the working temperature will also affect the battery life. The thermal stability of some formulations of NCM battery is low (for example, the high temperature of ncm811 will significantly reduce its usable capacity), and the thermal stability of some formulations is high (for example, ncm622, even if the high temperature has an objective usable capacity), so I suggest not to tangle too much, just charge with the maximum safety. In any case, BMS will adjust the charging current in real time according to the battery temperature and SOC capacity, just for consumers. @It's not as good as a 25-year-old girl, the first car, with a budget of 200000-300000, who tends to be able to hang a green brand of hybrid or pure electricity, and doesn't like Japanese cars. Do you recommend it? Luo shunpeng has been worried for a long time. Fortunately, he hasn't lost his hair. To be honest, this budget range is a little bit higher than low. If the budget can be a little more than 300000, Tesla Model 3 and polar 2 will be a good choice, the shape is also good for girls. But if it's going to be 200000-300000, it's just for a green brand. If there's no pure electricity or plug-in mix preference, the plug-in mix version of Passat and Maxon GTE are both good choices. The control quality is guaranteed, but the modeling has no characteristics. In addition, we recommend Tengshi x, plug-in hybrid medium-sized SUV, advanced version of Tang DM / EV, and design elements, but it's a little expensive. @Zain plans to buy a car by the end of the year. Under the current situation, which is more worth buying, gasoline car, hybrid car or pure electric car? Or which one is more suitable for the working class (in the first tier cities, daily travel on behalf of others) brother Zhou Tiegang, straight man. If most of the daily driving environment is used in the first tier cities, it is more recommended to drink pure electric vehicles for hybrid cars. The main reason is the fuel consumption and vehicle cost. The probability of congestion in big cities is high. As for the choice between hybrid cars and pure electric cars, it depends on the actual car environment. If the home can be installed at home or near the home, the company has, charging is more convenient, the choice of electric cars is the most cost-effective. At present, the endurance of electric vehicles is generally more than 400km, long endurance can greatly improve the convenience of vehicles. The cost of electric vehicles is the lowest, charging is cheap, and can greatly save money. In addition, the maintenance and after-sales service of electric vehicles are also relatively easy. There is no regular maintenance such as oil change and filter replacement. You only need to check the car condition regularly. The car experience is very good, and it is very suitable for users with little spare time. If there is no condition to install a charging post at home or there is no convenient charging station nearby, it is undoubtedly the most appropriate to choose a car model. Its fuel consumption is much lower than that of a gasoline car. At the same time, its daily maintenance cost is not higher than that of a gasoline car, just like that of a normal gasoline car. @There is a fundamental problem for HaoChen. The energy density of electric vehicle battery is far lower than that of gasoline. At present, lithium-ion battery is the mainstream, but why lithium element is used as the negative electrode of battery instead of others? Can we find other alternative elements to improve the energy density of the battery? Excuse me, is qiumingshan the owner here? I'm sorry, material researchers all over the world are looking for the answer to this question. According to the chemical periodic table, the relative atomic mass of lithium is 6.94, which belongs to the first group or the second period, and is the most active element among known elements (including radioactive elements). Because of this, lithium atom has the characteristics of relatively small mass, strong ability to gain and lose electrons, high proportion of electron transfer. From the perspective of manufacturing difficulty, manufacturing cost and the pollution of the whole life cycle, lithium battery is the best solution at present. Even in the recent hot solid-state battery, the glass compound made of lithium and sodium is used as the conducting material to replace the electrolyte of lithium battery. Of course, from the perspective of pure chemical elements, hydrogen is undoubtedly a better energy carrier, which is why batteries have been in the ascendant, but considering the difficulty of hydrogen production and the cost of hydrogen storage, they can not be widely used now.
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