The latest generation of self-developed Lanhai power system is industry-leading in power and energy consumption; 5C super fast charging technology, charging for 10 minutes to increase the driving capacity by 450 kilometers; The first AI energy management system can intelligently determine whether to heat the battery according to the driving habits of the car owner...... These industry-leading new technologies include the achievements and sweat of the R&D team led by Huang Min, Senior Director of New Energy Technology and Secretary of the General Party Branch of VOYAH Automotive Technology Co., Ltd. (hereinafter referred to as "VOYAH Automotive"). These innovative technologies have also become the foundation for VOYAH to launch three new cars in three years and upgrade its models three times a year.
"R&D is always challenging, and we need to meet the challenges and focus on technological innovation to create better products." In Huang Min's mind, it was the party emblem that gave him the infinite strength to lead the team to overcome difficulties.
Rigorous and meticulous, improve energy density
As a high-end smart new energy brand, the VOYAH FREE318, which was launched in June this year, is a hybrid SUV model with an ultra-long driving range of 1,458 kilometers. Among them, the technology of ultra-long pure electric driving of 318 kilometers is the painstaking work of Huang Min and the R&D team for 10 consecutive months.
At the beginning, in the face of this key task of tight time, high quality and strict requirements, Huang Min led the party members and backbones of the three general party branches of R&D to set up the "H97D pure electric driving promotion team", and set up a party member vanguard post, actively play the vanguard and exemplary role of party members and the fortress role of grass-roots party organizations, implement the party building and R&D work in the same direction, deploy synchronously, work together, grasp the key links, strictly control the target requirements, riveting full of energy, and take the responsibility of hard work, rigorously and meticulously promote the research and development work. During the period, he led everyone to analyze and sort out the feasibility plan for reducing energy consumption and improving the driving mileage of pure electric vehicles from the perspectives of batteries, motors, electronic controls, and hybrid systems, and put forward 13 special topics for improving the driving range of pure electric vehicles.
Among them, the energy density of power batteries should reach the industry-leading level, and the charging and discharging range of power batteries should be optimized to improve the available power. Under the organization and leadership of Huang Min, the backbone of party members and team members made bold innovations, and passed the dynamic bottom impact equivalent to 1000J (joules) for the first time in the industry, and the upper cover was made of three-coated high-strength material; The unique design of the combination of exhaust channel and explosion-proof valve is adopted to ensure the timely release of pressure in an emergency; The introduction of three-dimensional protection between the cells, as well as aviation-grade aerogel + large-area efficient thermal management system, fundamentally inhibits thermal diffusion. As a result, through the exquisite design, even if the two cells are triggered by thermal runaway at the same time, they can achieve no fire, no explosion, no leakage, and no thermal diffusion, and stand on a new level of battery safety industry with excellent performance.
In the process of independent research and development of high-efficiency electric drive system, Huang Min brainstormed and used 0.25mm ultra-thin silicon steel permanent magnet synchronous motor technology to optimize the motor rotor topology and magnetic performance, and on the basis of the previous generation of VOYAH FREE products, the CLTC pure electric driving has been improved by 26 kilometers. At the same time, in the research and development of electronic control systems, we deeply explore the potential of pure electric driving to improve and reduce fuel consumption, use big data to analyze the energy flow and user habits of the whole vehicle, and improve the pure electric driving mileage of the vehicle from the perspectives of energy management, efficient hybrid control and efficient thermal management.
In the whole process of project research and development, Huang Min gave full play to the role of the backbone of party members, not only set up a party member research group, but also the general party branch to coordinate the establishment of a research mechanism, organize and coordinate the resources of all parties, and regularly review the progress of the project. In order to fully verify the optimization effect of vehicle energy management, they took root in Turpan, where the extremely high temperature is above 45 °C, and the Yakeshi area is extremely low -40 °C, for 3 months, and through field tests and verification, they continue to balance the dynamics, emissions and economy of the vehicle, which not only ensures the achievement of ultra-long driving range, but also reduces fuel consumption by 5%. During this period, the party members and the masses worked together and worked tenaciously to inject strong momentum into the FREE318 new models, helping the FREE318 to achieve the goal of 318 kilometers of pure electric driving efficiently, and ensuring that the new models were launched on time.
Meticulously crafted to create a silent electric drive
With the large-scale and rapid popularization of new energy vehicles, traditional engines have been replaced by motors and drive controllers, and the noise problem of electric drives has become prominent. In order to meet consumers' needs for a quiet driving environment, Huang Min led party members and team members to carry out technical research on the key topic of "NVH optimization of electric drive system".
"The so-called NVH, which is the English abbreviation of noise, vibration and harshness, is a comprehensive index to measure the quality of automobile manufacturing." Huang Min said that this is an important part of bringing a good experience to car users.
Paying attention to the role of grassroots party organizations at all times and everywhere is a "magic weapon" that can continuously overcome difficulties in the work, and it is also one of the characteristics of efficient research and development of Huang Min's organization and team. In the research of this key topic, Huang Min took the lead in the project through the branch, and the party members took the lead in tackling the problem, and set up a research team to decompose the research and development tasks according to the characteristics of a variety of related components, including low-noise motor innovation technology, low-noise reducer technology, excellent noise reduction control strategy, etc., and then carried out technical research item by item.
In order to overcome this technical problem, Huang Min led everyone to focus on the two core components of motor and reducer, and formulated a clear work plan, stage points and promotion plan according to the time schedule. In the experimental stage, the R&D team has accumulated a large amount of data through hundreds of days and nights of experiments. During the whole technology research and development period, debugging, experimenting, debugging, and experimenting again...... Patience and meticulousness in such a state has become the norm for them.
During the period, in order to overcome the noise problem of the reducer and find the optimal solution for the silent electric drive, Huang Min led the team to make an article on the reducer assembly, through system simulation, to find the shaft tooth optimization design scheme in the range of 0.1 microns, and innovatively introduced high-precision honing technology to optimize the tooth shape and gear backlash, thereby improving the gear machining accuracy, effectively suppressing all kinds of jitter, and the total coincidence reached the advanced level in the industry. In this process, the team also creatively optimized the motor for the pain points of motor noise. A variety of processes and methods are used to greatly reduce motor noise. In addition, in order to ensure that the electric drive system can achieve the best NVH effect under different working conditions, he also led the team to adopt an effective solution to reduce the noise of the electric drive controller and reduce the radiation of the assembly noise.
In the past 10 months, Huang Min and his partners have worked hard, and the average working hours of the backbone of the team have reached 14 hours a day. To the satisfaction of Huang Min and his partners, after thousands of experiments and explorations, the results of electric drive NVH performance optimization have been achieved, leading the industry by more than 5dB (decibels), and the interior noise in the vehicle under common urban working conditions is less than 30dB, realizing the quietness of driving like a steel needle falling to the ground, bringing customers a super driving comfort experience, and the technology will be installed on the first pure electric SUV "Bosom Friend" model of VOYAH.
Work together to build a grassroots fortress
Over the years, Huang Min has led party members and partners in the R&D team to help VOYAH launch one amazing model after another with innovative achievements and become a model for the new forces of the national team.
At the Shanghai International Auto Show in April 2023, the "VOYAH Chasing Light", equipped with the industry's first semi-solid-state battery, became the focus of the industry's attention as soon as it was unveiled. Semi-solid-state batteries have the advantages of improving safety performance, improving vehicle driving range and charging speed. VOYAH is the first in the industry to achieve mass production, and has achieved no smoke, no leakage, no fire and no explosion in the acupuncture test of the cell. This is the crystallization of the wisdom of Huang Min and the technical research and development team for two years.
Over the years, Huang Min has led the team to participate in the independent research and development of a series of advanced technologies in the industry, such as "Lanhai Power" and "Amber Battery", and has also made outstanding achievements in cultivating a talent team with professional skills and innovative spirit. In 2020, Huang Min won the honorary title of "Chegu Talent"; He also won the title of "Famous Teacher with Apprentices" in Hubei Province in the "Mentor with Apprentices" activity.
The three general party branches of VOYAH R&D, of which Huang Min is the secretary, were established in January 2024 and have a total of 73 party members. The general party branch consists of a new energy technology party branch, a power and vehicle party branch, which is composed of party members from four first-level professional departments of new energy technology, vehicle development, power system and vehicle safety. So far, the general branch of the three party branches of R&D has created the working method of "four haves, two belts and one linkage". Among them, the "four haves" are faith, feelings, dedication, and expertise, the "two belts" are the branch with the topic, the party members with the task, and the "one linkage" is the linkage of the party and the labor group, caring for you, me and him, and serving the "research and development three". All party members of the branch are in close contact with the masses and build a strong branch. Outstanding work and brilliant achievements, the party branch under the general party branch has won the "excellent party branch" of the VOYAH party committee, and some party members have won the honorary title of "outstanding party member" of Dongfeng Motor Group Co., Ltd.
As the "new strength of car manufacturing" of the national team, VOYAH is taking a good and steady step towards the global market. Huang Min and the R&D team are fully involved in the research and development of cutting-edge technologies such as 800V high-voltage system for electric vehicles, 5C overcharging system, high-end electric ESSA architecture upgrade, Lanhai Power 2.0 solution, and solid-state battery.
"Firm faith, pursue dreams, passion for entrepreneurship, and develop world-class new energy technology." Huang Min's pursuit is that he will work hard with his partners to achieve the brand mission of "let cars drive dreams and empower a better life".
Text: Zhao Jianguo Editor: Xue Yapei Layout: Liu Xiaoye
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