Why is the BYD K8-Series electric passenger car in high altitude Tibet?

In 2014, BYD launched 10.5 meters long K8-Series electric passenger cars, retained the wheel-driven bridge and modular control strategy configured by K9, and provided customized power batteries for customers. Configuration. 2017 New K8 Series Listed, BYD’s first new two-wheeled electric drive technology (control strategy) + power battery liquid power battery thermal management technology (control strategy), again refreshed electric passenger car technology and height.

2017 BYD opens electric passenger cars high altitude to the test industry primary river, 2018, Tibet Lhasa introduced BYD K series electric double bus. From the 2019 C6 and K8, the electric passenger car is batch, helping Nammut Scenic Area to achieve all electric power of the passenger car, and then to Shigatse will put more than 70 B8 system electric passengers. As of the current Tibet area, BYD electric passengers in the Tibet are 152 tower. The author will share this manuscript to you why BYD K8 is the reason for the high altitude of Tibet.

First of all, it is that one traditional power bus can have no very advanced technology, but it is necessary to have considerable stability; one excellent electric passenger car, first to have electric power safety, second It is the operating cost in full life meets the expected setting.

1 excellent and efficient electric passenger car is used in public transport operations, it must be fully controlled to the real performance of the car. Therefore, the performance limit test of the “high temperature conditions”, “high altitude” and “high altitude conditions” of the electric passenger cars are very necessary. The new energy intelligence analysis network evaluation group, fortunately, in 2018, the BYD K8 system electric passenger car “three high” tests were recorded, and exclusively recorded the wheel motor, power battery and liquid heat management control technology, the warmth of the vehicle Refrigeration Strategy Iterative Evolution.

1, BYD K8-Series electric passenger car high temperature working conditions after testing:

In July 2017, BYD is the latest modification of K8 Turpan conducted high temperature tests. In Turpan, the surface temperature exceeds 50 degrees Celsius, K8 latest modified electric passenger car, different speed, differentElectricity, no load conditions under the load conditions, thereby performing accurate allocation of the vehicle energy.

The figure above is 2017, and the BYD K8-based electric passenger car after Turpan high temperature test is close-up.

Purple Arrow: Power Battery Heat Management Control Module

Red Arrow: Power Battery Management Controller (BMS)

White Arrow: Post-Auxiliary Control Assembly

Blue Arrow: Electric Steering Machine Delay Boost Control Unit

Green Arrow: High Voltage Distribution Control Module

Orange Arrow: Left and Round Wheel Drive Motor Control Module

Purple Arrow: “3 He 1” Control Module (DC and Auxiliary Motor Control Module)

Compared with different conditions of travel and Parking “Idle” working condition, BYD K8 battery “Power Battery Heat Management System” is always in the working state and ensures self-adjustment in the internal temperature of the battery module in the range of 35-25 degrees Celsius. Moreover, different from the previous mass-produced K-series electric passenger cars is that BYD K8 adds a set of electric steering retaining boost control units. In an instantaneous power-off instantaneous abnormality in the whole car, the high-voltage power electrical power supplied to the steering machine can be maintained through this module so that the driver will control the danger of the whole vehicle during this time.

2, the reliability performance after the high altitude test of the electric passenger car in BYD K8 series:

Substation temperature in July 2017 After reaching 88 degrees Celsius, Xinjiang Turpan high temperature evaluation, the author went to the Tibet of Tibet, Lhasa, Tibet, 4882 meters in September (5030-meter Gangli Mountain), which was a high altitude of the BYD K8 electric passenger car. The author in Lhasa conducts high altitude testing models, the previous Turpan high temperature evaluation is loaded with 196.6-degree electric batteries, and the full-load condition continued 200 kilometers of the same K8 electric passenger car. The latest state K8 can superimpose multiple groups (even) power according to user needsBattery units, each set of battery cells Configure a separate BMS system and thermal management system (water-cooled heat dissipation or low temperature preheating line).

This high altitude test is adapted to the power and torque values ​​of the drive motor for adaptive matching of BYD K8 electric passenger cars suitable for use in urban and suburbs. In order to make a broader compatibility of different road conditions and the energy consumption of the car environment, the economic downturn is scheduled for 30-60 km / h.

In the Tibetan Plateau in the sea level in the Tibetan Plateau, K8 electric passengers, the road conditions such as the road conditions and the road conditions of the speed and sharp climbing height, can also apply the plain area The technical settings, this is the root cause of multiple working conditions test in the high altitude region of K8 electric passenger cars. In order to real simulate the K8-Series electric passenger car integrated performance in high altitude conditions, the weight loss has been added to the maximum load of the two-wheeled motor and the power battery system.

can be found through a series of high altitude testing, K8 electric passenger car configuration 2 set wheel drive motor maximum output power 180 kW (2×90), in high altitude area power output is the same as the plain area, there is almost no problem due to altitude generated power and torque attenuation. 2 sets of wheel drive motors In continuous climbing and downhill, the temperature improvement is always in a controlled state. For the use of traditional diesel engines, the rear wheel driven bus, K8 electric passenger cars can be eligible for use in high altitude in Tibet.

3, BYD K8 series electric passenger car alpine + low altitude (Hailar) work condition after testing:

Accurately, in the cold + The performance test of low altitude conditions is also the test focus of BYD K8 series electric passenger cars. In the outdoor minus 52 degrees Celsius Hailar, the K8 modified electric passenger car was upgraded for the previous high temperature and high altitude test model, which added a “heat management” system that copened the high-precipitation environment as an energy source.

The figure above is 2017,BYD K8 Series Electric Power Capsule Dynamic Capsule Test Status of Hailar High Cold Status Test Status.

Yellow Arrow: Wheel Drive Motor Controller

Red Arrow: High Voltage Hub (Control Assembly)

White Arrow: “3 He 1” Control Cheng (each responsible for 1 set wheel drive motor)

Green arrow: natural gas is the energy source capsule cabin air conditioner “thermal management” system cooling water hydraulic solution

orange arrow: with the market The same battery is sold in the K8 electric passenger car, the additional system controls small assembly

Purple arrow: PTC power battery “thermal management” system control assembly

[123 The maximum technical highlight of the K8 modified electric passenger car that is 303.1 degree of electricity is not doubtedly the “hot management” system that is installed by the high-precious area. With power batteries for passenger compartment heat, it will consume excessive consumption in the high-precision area, affect the vehicle life. After the natural gas is “thermal management” system, it can quickly improve the passenger cabin temperature at almost any battery power. Moreover, natural gas passed the cabin “hot management” system scheme matures, and the PTC air conditioning system adapted to the original car can be used alternately.
4, BYD K8 series electric passenger car altancy + high altitude (Nammla) working conditions before the reliability test performance before the operation:

The BYD K8 electric passenger car in “Three High” tests is upgraded again in the subsequent time, especially for the frequent rain and snow climate and ice and snow road conditions such as Tibet. The new K8 electric passenger car “extra” increased. Group 1 “Rain” mode drive switch. On the basis of a routine D gear, by defining the maximum torque output characteristics at the start, the control system “artificially” suppresss the torque output of the wheel drive motor, which has obtained a safer driving attitude.

The picture shows the technical close-up of the rear of the BYD K8 modified electric passenger car after Nammine Operation.

Blue Arrow: “6 in 1” high voltage power system assembly

Green Arrow: Control System Assembly (2 Groups) of Servo Wheel Drive Motors

Red Arrow: Car Charger (2 Groups)

White Arrow: Steering Machine

Yellow Arrow: Servo Drive Motor Circulating Pipe (2 Groups)

K8 modified electric motor for nammia in a nammal disorder at sea level The passenger car is particularly adaptive to the climate environment of temperature difference. 3 sets of PTC modules and 1 set of water-free board modules are specifically set to provide different temperature demand for cockpit windshields, cabins, and power batteries (including high temperature heat dissipation servos of power batteries).

BYD K8 modified electric passenger car experienced Turpan high temperature test, Lhasa (Yanghu) high altitude test and Hailar alpine. Each limit test, K8 modified electric passenger car, all of the new systems, with the wheel drive motor, adapt “thermal management” phosphate power battery assembly, vehicle control system, technical performance and reliability verification .

5, the global scope of BYD electric passenger car’s market recognition:

Not long ago, BYD announced the year of signing electric passenger car with German Federal Railway Company Cooperation framework agreement, the first electric passenger car will be invested in Baden-Württemberg, Germany this year. The local automotive industry is highly developed, including luxury car brand Porsche, Auto Parts Supplier Bosch and other company headquarters. BYD electric passenger cars can operate in this operational significance.

The K9 series electric passenger car made by BYD, China, in Japan, is used in urban bus and airport ferry missions in Japan. This is also the first time in China’s local car factory. Export to Japan exports to the whole vehicle.

Adud’s electric passenger cars and taxi products have been covered in more than 50 countries and regions, 300 cities. According to data from BYD, the data released. BYD has exceeded 800 electric passengers available in Europe, the market share is over 20In a percentage, in the global new energy bus market, BYD has accumulated more than 65,000 electric passenger cars to all local markets, with accumulated sales of the world. Also, the electric passenger car market is spread all over the UK, France, Australia, Japan and other economic and automotive industries.

In recent years, Tibet has always been combined with the protection and construction of ecological safety barrier, and increase the national key ecological functional district transfer payment. Let the masses fully enjoy the ecological policy dividends. Tibet will realize the income of the people to achieve rich in the new ecological economy, the green economy and the green industry. Therefore, seriously do a good job in developing ecological strength, “four major events”, is the weight of the entire Tibet area in recent years.

Tibet, adhere to the people-centered development thoughts, firmly establish green mountains and green hills, and ice and snow are the concept of Jinshan Yinshan, multi-directional multiple measures to promote the construction of ecological environment and The development of the transportation industry, through the promotion of the public transportation level, promoting the actual action of new energy passenger cars, and building a green “happiness road” of the farmers and herdsmen. BYD electric passenger car as a new energy, environmentally-friendly travel tool, which is highly developed, motor, electric control, etc., has a strong match, better response, efficiency, and standard power battery. The thermal management system can ensure the quality of efficient operation and full life cycle product quality in the highland climate environment of the vehicle. The rooms can reach more than 200 kilometers, meet the daily bus operational needs of customers.

The author has something to say:

From the beginning of the entrepreneurship, BYD has never changed the green dream, as the only core technology and charging support for the world at the same time. The facility companies have been to address social issues, which is constantly providing effective and grounding solutions for sustainable development of human society. Due to the geographical reason, Tibetan areas have unique climate environments and ecological protection needs. Therefore, green reliable electric passengers become the main public transport travel tools in Tibet, BYD K8 series electric passenger cars through “three high” tests, do electricity The technology advanced and performance of the bus is reliable. [1

At the same time, as petrochemical resources, the Sichuan-Tibet line and even the new Tibet supplied from the inland line, but there is a powerful hydropower resources from Yarung Zangbu. In Tibet, Lhasa took the lead in bus electricity, and continued to implement rental and official vehicle electricity, which would help reduce oil consumption ratios, enhance reasonable electricity level. From this to strengthen the construct of the construction of the 2nd, 3rd, 4 hydropower stations in Yarung Zangbao, strengthen the discolity right to control the control of water resources around the surrounding countries. Moreover, it seems that a civilian electric passenger car is put in Tibet, but the first to create a variety of new energy technologies and a high-altitude load application.

New Energy Intelligence Analysis Network Evaluation Group Origin