How is Backlack lamination revolutionizing China’s EV market? As demand for electric vehicles grows, Backlack lamination in China’s EV market has become essential for enhancing motor efficiency and performance. This new technology, adopted by leading Chinese manufacturers like Lamnow, significantly improves noise reduction, vibration control, and motor reliability.
Backlack- Self bonding Motor Lamination China Manufacturer
Lamnow
Established in 2006, Lamnow Ltd. operates two factories in China and Vietnam. The company specializes in producing motor core laminations and metal stamping parts. Their high-precision Backlack adhesive electrical steel sheets are used in EVs, power tools, industrial applications, renewable energy, and more. Lamnow offers a wide range of services, including lamination stamping, bonding, prototyping, core assembly, motor core epoxy insulation, rotor die casting, and stator winding.
Xinzhi Group
Founded in July 1990, Xinzhi Group specializes in the research, development, manufacturing, and sales of various motor core components. Their primary products include automotive alternator stators and assemblies, micro-special motor rotors, electric bicycle stators and assemblies, elevator traction machine stators, power tool motor rotors, VVT system rotors, and home appliance motor rotors.
Xinzhi Group’s self-bonding motor cores are known for their excellent NVH performance and high efficiency, gaining recognition from many EV manufacturers. The company invests in research and development to innovate in self-bonding core technology. It holds the position of the world’s largest supplier of automotive alternator stator cores, with over 45% global market share.
Wuxi Longsheng
Wuxi Longsheng Technology Co., Ltd. is a leading EGR (Exhaust Gas Recirculation) and motor core supplier in China. Listed on the Shenzhen Stock Exchange in 2017, it acquired Wuxi Weiyan Precision Co., Ltd. in 2018 to expand its precision component business.
In 2019, Wuxi Longsheng became a Tier-1 supplier for United Automotive Electronics and a Tier-2 supplier for major automakers like Volkswagen, NIO, and GAC New Energy. The company’s self-bonding motor cores, made with advanced manufacturing processes and materials, provide high precision, stability, and low loss. These qualities meet the needs of the EV market.
KURODA JENATEC
KURODA is a prominent player in the field of backlack bonding motor lamination technology, known for its Glue Fastec solutions. These products are designed to minimize noise and vibration. They enhance bonding strength and reduce iron loss by over 10%. They also provide excellent thermal conductivity and a high stacking factor. As a leading innovator, KURODA continues to push the boundaries of motor core technology to improve motor efficiency and performance.
Ningbo Hongda
Ningbo Hongda holds several core technologies and patents in the self-bonding motor core lamination sector, positioning itself as a key driver of this technology in China. The company’s high-quality self-bonding motor core products are favored by numerous EV manufacturers for their superior NVH performance and efficiency.
Suzhou Fansite
Suzhou Fansite focuses on the research and production of drive motors for EVs. Their self-bonding motor core products, manufactured using advanced production techniques and materials, boast high precision, stability, and low loss. Fansite products have gained widespread market recognition for their exceptional NVH performance and efficiency.
Jiangyin Huaxin
Huaxin Precision focuses on research, production, and sales of precision stamping products. This includes various precision stamping motor cores and related dies. The company supplies self-adhesive motor laminations for BMW, demonstrating its ability to meet high international standards.
POSCO
POSCO is using its world-leading steel production capabilities to create a strong global supply chain for motor cores. The company has plants in China, Vietnam, Indonesia, and Latin America. POSCO is developing a production system to produce 5 million tons annually. By 2030, its mobility solutions division plans to produce over 2 million motor cores in South Korea alone. This will make it the largest producer in the country and a top player in the Asian market.
EMLJ
The first manufacturing center, Euro Group Co., Ltd., was established in April 2016 and focuses on producing motor cores for automobiles, home appliances, generators, and rail transportation. The second manufacturing center, EMLJ was established in March 2022, utilizing Industry 4.0 and digital factory concepts. With an automation rate of 95%, the production line is highly flexible and capable of handling over 10 different products, serving more than 30 vehicle models. The company is projected to achieve annual sales exceeding 1 billion RMB upon reaching full production capacity.
Conclusion
Backlack lamination in China’s EV market is driving significant advancements in motor efficiency and performance. As the demand for electric vehicles continues to rise, the role of Backlack lamination in enhancing the capabilities of motors becomes even more crucial. By adopting and refining this technology, Chinese companies are setting new standards in the industry. The future of electric vehicles in China looks promising, with Backlack lamination playing a key role in shaping a more efficient, sustainable, and high-performing market.
FAQS
What is Backlack motor lamination technology?
Backlack, also known as bonding varnish, refers to the process of stacking motor laminations by re-bonding the adhesive varnish applied to their surfaces through temperature changes. This technique is almost non-damaging to the motor stator and rotor, allowing for greater design flexibility as it eliminates the need for welding or cleating slots on the iron core. Additionally, Backlack minimizes eddy current losses in the iron core, contributing to higher motor efficiency and performance.
What are the benefits of using Backlack lamination in motors?
High Strength: Backlack lamination provides tensile shear strength of 14-18N/mm², allowing for secondary processing such as turning, grinding, and drilling.
High Power Density: It enables the production of smaller, lighter motors with a high stacking coefficient of ≥98.5%.
Reduced Vibration: The self-bonding process reduces operational vibrations within the motor core, leading to quieter motor operation and lower noise emissions.
High Precision: The uniformity of surface contact is improved, enhancing the flatness and verticality by over 50% (with a feeler gauge thickness of 0.05mm).
Better Thermal Management: Backlack lamination improves thermal conductivity, ensuring optimal axial heat transfer and reducing motor temperature by 5-10℃.
Flexible Design: The technique allows for a stronger, smaller magnetic bridge design of 0.25-0.50mm, giving motor designers more flexibility.
Improved Performance: Motor torque and efficiency are both increased by 5%, and the higher cleanliness level extends the motor’s performance and service life.
Energy Efficiency: Backlack lamination contributes to longer battery life by reducing iron loss by 15-30%, lowering energy consumption, and potentially reducing the need for insulating varnish.
