In winter, the endurance rate is as high as 96%. Byd Dolphin has taught me a lesson

2022-06-09 0 By

Although electric cars are not a completely new product, there is no denying that electric cars are changing the way we travel. As major manufacturers have announced that they will completely stop selling fuel cars in the near future, we have become more intuitive to realize that the era of electric cars will come sooner than we expected.But like most new things, electric cars come with a new problem — range anxiety.Range anxiety is the most personal experience of every electric car owner, especially in the cold winter, the range of electric cars is as unreliable as the weather forecast, which has led to the fun of netizens calling cars “electric dad”.If the fuel owners hope their car average fuel consumption is lower, so for pure electric car owners, is particularly care about the endurance of the car.Byd brought us a new species, the first model of dolphin from E platform 3.0. Recently, Volkswagen Kon car participated in dolphin’s endurance Challenge in Beijing. Let’s go to see whether this car can show its “anti-freezing” ability with the help of new technology.Our test model is the 2021 405km Dolphin Fashion edition. The test location is the suburb of Beijing, and the electric power runs from 100% to 0% through national roads, mountain roads and urban roads, to see whether this model can really solve the daily commuting needs of consumers.To ensure fairness, it is necessary to paste “honesty sticker” and seal the charging port with a seal, so that the charge can not be charged during the whole journey.The test vehicle is uniformly set to ECO economic mode with maximum kinetic energy recovery, air conditioning set at 26 degrees, and wind speed at second gear. After all these preparations, the vehicle can set off.In fact, the impact of power consumption equipment on the range is not very big, the driving process is the most important thing to save electricity, in other words, the key to save electricity or not lies in the right foot.On the road, we try to maintain a constant speed to avoid wasting power due to sudden changes in speed.To achieve higher range, we had to start, brake, climb steep hills and take over manually when necessary, leaving cruise control the rest of the time.Because each car has two teachers driving in turn, so two days of driving is not really tiring.In addition, in the driving process, we try to use less brakes and kinetic energy recovery system to control the speed as much as possible, which can fully save electric energy, but it also requires certain driving experience to predict.It is worth mentioning that for a long time, I for electric vehicle kinetic energy recovery system of dynamic resistance, but the life challenge, changed me, suggested that resistance of kinetic energy recovery users also took part in a range of challenge, will fall in love with this kind of feeling, especially feel power cannot support vehicles under the condition of the whole journey,The sense of security brought by strong kinetic energy recovery is self-evident.On the first morning, we drove from the suburbs of Shunyi to Gubei Water Town. The main road was gentle and the temperature was relatively friendly.When we arrived at lunch, we drove 10.5kwh /100km meter display power consumption, started with 405km meter display range, but actually drove 120.6km, and the remaining meter display range was 274km.After lunch, from Gubei Shuizhen to Badaling Resort in Yanqing, the whole journey is about 160km.It was a team, after all, so I ran the entire afternoon.We ran a gentle downhill, bringing the meter power consumption down to a minimum of 7.3kwh /100km, followed by a continuous steep uphill climb to 11.7kwh /100km at our destination, with 281.1km of actual driving and 95km remaining on the meter.After all, I had to run 86km again the next day. If I had stopped for a night, I might break down halfway if I consumed too much power.But to our surprise, after a night of low temperature standing in the garage at about 0℃, the overall battery life almost did not decay, which made us pleasantly surprised.However, when the car left the bunker, the sudden drop in temperature froze the range of the indicator by 2km. The temperature quickly dropped to -13℃, which immediately reduced the range of the indicator to 93km.And at this time, the display power consumption is still rising, the highest reached about 14.5kwh /100km.At this point, the table shows that power loss and real consumption are infinitely close to 1:1, and it is impossible to say that there is no anxiety.After all, the terrain of Beijing is high in the north and low in the east. Fortunately, the whole way of downhill makes the navigation time return to above the preset safety line. With the increase of the distance, the power consumption continues to decrease, even reaching about 6.3kwh /100km at the lowest point, which makes us both surprised and worried about the power consumption.When we arrived at the gate of the hotel, we still had about 20km of mileage left. Because we did not meet the deadline, we also wanted to see how far the dolphin with a nominal cruising range of 405km could run, so we made a circle at the gate of the hotel. Finally, at 11:30, our actual cruising range was fixed at 383.8km.But we drove the car back to the hotel where we had started, and the actual range was 390.6km.In the whole process of the race, most of the drivers kept driving at about 40 kilometers per hour. At the deadline of submission of results, the teachers with a endurance of 388.8 kilometers won the championship. Our group won the second place with a endurance of 383.8 kilometers, while the third place with a endurance of 376 kilometers.Although it is a little regretful to miss the championship, but also through this test intuitive feel BYD dolphin endurance beyond consumer expectations.In a day and a half of the road, the dolphin’s average sound insulation noise reduction performance, lower speed, almost imperceptibly motor LiuSheng, and wind noise and tire noise all can get a good inhibition, when high speed, current sound and wind will be slightly into the car, but also has no interference to ride, harshness (NVH) of sound insulation noise reduction level at this level belongs to a hierarchical model. Why do dolphins have such low power consumption?Want to know, in order to solve the problem of winter tram running difficulty, BYD is painstakingly.First, it is the direct cooling and direct heating technology of battery pack refrigerant.To put it simply, the refrigerant direct cooling and direct heating technology is to use the latent heat of the phase change of the cold medium itself to absorb or release the heat energy of the system, so as to control the charge and discharge of the battery or the heating process through heat exchange.For consumers, using this technology, the temperature difference of the battery can be controlled within 5℃ and the thermal efficiency can be improved by 15%.That means less power is needed to heat the pack and keep the battery warm.Second, is the heat pump system, this system can be seen as a reaction refrigeration air conditioning, through the compressor to carry the heat in the air, while using refrigerant as a medium to bring the heat outside the car to the car for heating.Because in the process of electric vehicle running at low temperature, it not only needs to heat the battery pack, but also involves the demand of heating the vehicle members.In response to this scenario, the traditional design ideas are mostly resistance wire heating or heat pump system heating, but the former has a large power consumption, while the latter is limited by the bottleneck caused by the low temperature working efficiency of refrigerant.To solve the problem, BYD uses the energy recovered from motor waste heat as an auxiliary heat source for the heat pump to improve its working efficiency in low-temperature environments.The heating efficiency of the heat pump system is higher than that of the traditional PTC heating scheme.And a higher heating efficiency, of course, means a smaller energy loss.It is not difficult to see that the r&d logic of BYD’s E platform 3.0 is to efficiently utilize energy from the perspective of the vehicle, so as to solve the endurance pain point of electric vehicles.In addition to the heat pump and direct cooling and direct heating system, the motor efficiency and motor controller efficiency of PLATFORM E 3.0 have also been greatly optimized. The application of 8-in-1 electric powertrain and efficient flat motor reduces the mechanical loss during vehicle movement, thus improving the operating efficiency of the vehicle.By reducing the drive loss of the vehicle, improve the conversion efficiency of electrical and mechanical energy, so as to ensure the range, low temperature range increased by 20%.It is such a technical support, to ensure that even this low temperature environment, byd dolphins still showed the strong of life, what’s more, it is only 44.9 kWh battery capacity, if after more than 80 kWh of battery capacity models, winter range will be able to reach 450 km or more levels, the measured results at the same time,It also allows it to stand alongside many higher-priced models with larger batteries, making it easier for electric cars to use in the winter.Kan Che said: in general, BYD Dolphin appearance level is high, the configuration is sufficient, and the battery life is extremely solid, it by virtue of true battery life for users to bring a good use experience, and further for electric vehicles to further popular, expand the market has made a contribution.It should be noted that BYD has never been stingy in using the latest technology on affordable models, which is the biggest difference between byd and many car companies. Whether it is the previous DMi or the current E platform 3.0, they can accurately solve the pain points of users.This year, BYD will also launch other models of the Ocean series, expand the product matrix, explore a larger market space, and secure the position of the new energy market.