In the winter, especially in the northern region, the "unsolvable problem" of new energy vehicles - the "broken bones" of winter endurance began to appear. The user's "mileage anxiety" is aggravated, not to mention, but also with more annoying problems, with the increase in the number of charging caused by the problem of charging difficulties.
Not long ago, according to the CCTV Financial "Economic Information Network" column, in the Beijing area where charging piles are evenly distributed and the number is relatively large, there are even new energy car owners who get up at four o'clock in the morning to charge the car, and the key is not necessarily to grab the position. In addition, according to the statistics of the China Association of Automobile Manufacturers, China's sales of new energy vehicles from January to November this year were 2.99 million, and it is expected to exceed 3 million vehicles in the whole year, and the penetration rate has increased by nearly 200% compared with last year. According to this development, the problem of charging new energy vehicles will be further aggravated.
So the problem is difficult to solve in a short period of time, and in the case of new energy vehicles, what is the way to extend the winter endurance and reduce the number of charging? It is necessary to start from the product, choose a new energy vehicle with these functions, and their winter battery life will be more "real" in comparison.
1
Choose a car with a battery intelligent temperature control system
The current power battery is basically based on ternary lithium batteries and lithium iron phosphate batteries, both of which belong to the lithium battery family. Studies have shown that lithium batteries will also reduce their capacity with the decrease of temperature, which will greatly reduce the mileage. In addition, low temperatures will also affect the charging process of lithium batteries, which is manifested in a long time.
In response to this problem, car companies have developed a battery intelligent temperature control system. Its main role is to make the power battery work at the right temperature, heat down, cold to keep warm, in order to maintain the performance of the battery. Although the battery intelligent temperature control system also needs to consume electrical energy when heating the power battery, the continuous upgrading of technology, the electrical energy consumed by it is negligible compared to the reduced electrical energy at low temperatures, thereby ensuring that the endurance of new energy vehicles in winter will not be particularly serious.
Therefore, friends who plan to buy new energy vehicles, especially those who live in the north, must choose models equipped with battery intelligent temperature control systems.
2
Choose a car with heat pump air conditioning
The air conditioning hot air of conventional fuel vehicles comes from the heat generated by the engine. But some new energy vehicles do not have engines, so engineers have come up with a simple and crude way of heating, that is, PTC heating. PTC heating is similar to electric furnace wire, which relies on current to generate heat through the resistance, and has the characteristics of simple structure, low cost and fast heating. However, the problem is that the utilization rate of thermal energy is low and the power consumption is large, which has a great impact on the mileage of new energy vehicles.
So later there was a heat pump air conditioner, which can collect the heat in the outdoor cold air and transport it to the car. The specific working principle is to use the boiling point of R22 refrigerant -41 ° C to absorb the heat in the air to its own body, and then circulate it into the car, and then turn it into a liquid state through the slurry condenser, which will release a lot of heat.
PTC heating air conditioning is through its own heating, and then transport hot air, while heat pump air conditioning is equivalent to the air heat porter, so compared to the former is much more energy-saving, the impact on the mileage is relatively small. Therefore, the second configuration that northern friends choose new energy vehicles to have is heat pump air conditioning.
3
Choose a car with a low wind resistance coefficient
Winter driving energy consumption is also higher than usual, because the lower the temperature, the higher the air density, for example, the air density at -7 °C is 1.12 times that of 25 °C.
Based on the above characteristics, if consumers do not have particularly bad road conditions when choosing new energy vehicles, they should try to choose a car with a relatively low wind resistance coefficient. In addition, cars with rounded appearances, closed wheels and hidden door handles will have a lower wind resistance coefficient.
According to the author's understanding, some models with particularly good wind resistance coefficients will also be marked in a conspicuous position on the publicity page, and consumers can pay more attention when choosing a car.
4
Improving driving habits can also increase winter battery life
Driving a new energy vehicle in winter and changing some driving habits can also play a role in increasing the mileage. For example, many new energy vehicles are now equipped with a single pedal mode, which we can turn on in winter. In single-pedal mode, when we release the throttle, the kinetic energy recovery system begins to work, slowing down the vehicle and converting the energy in the process into electrical energy for storage. This not only achieves the braking effect, but also improves the endurance.
In addition, it is to avoid sharp acceleration or emergency braking, look at the six roads when driving, listen to the eight directions, predict the road conditions ahead in advance, and reasonably control the throttle and brake, and drive smoothly. In addition, reducing unnecessary items on the car, the right tire pressure, and switching the air conditioner to internal circulation mode can reduce mileage loss.
Battery maintenance in winter also requires more attention from the user, and for short-distance driving, it is recommended to charge up to 80%. For long-distance drivers, the battery can be charged to 100% when charging, but driving should start immediately after charging. On the other hand, when the charge is less than 20%, long periods of deep discharge should be avoided. These practices help protect battery capacity, achieve longer battery life, and extend battery life.
Due to the declining performance of lithium batteries in cold, the endurance and charging time of new energy vehicles in winter will become "bad" at this stage. The only thing we can do at present is to alleviate the "hard injury" of new energy vehicles in winter by choosing models with some functions, such as low wind resistance, equipped with battery intelligent temperature control system, heat pump air conditioning, etc., and improving driving habits to alleviate the "hard injury" of new energy vehicles in winter and achieve the ideal mileage.
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