Core Customization Expert Insight: The "Heart" Technology Revolution Behind the 2026 Xiaomi SU7 V6s Plus Motor

1. The V6s Plus Motor: Comprehensive Performance Leap

According to the latest release, the 2026 Xiaomi SU7 comes standard with the V6s Plus motor, achieving multiple key upgrades:

Behind these impressive figures lies a comprehensive innovation in the materials, processes, and design of the motor's core component – the stator core.

2. Extreme Demands on the Stator Core for High-Speed, High-Efficiency Performance

As the "magnetic circuit skeleton" of the motor, the stator core plays a crucial role in high-performance motors. For the V6s Plus motor to achieve 22,000 rpm speed and 94% system efficiency, it places unprecedented demands on the stator core:

2.1 High-Frequency Loss Control

Increased speed means a significant rise in operating frequency. Traditional silicon steel sheets experience a sharp increase in eddy current loss and hysteresis loss at high frequencies. This requires stator core materials to use lower-loss, thinner-gauge silicon steel sheets, typically requiring ultra-thin specifications of 0.20mm or even 0.15mm, combined with special insulation coating processes.

2.2 Mechanical Strength and Precision

At 22,000 rpm, the rotor withstands tremendous centrifugal force. The stator core must not only have excellent magnetic properties but also extremely high mechanical strength and dimensional stability. This places stringent requirements on stamping die precision, lamination processes, and welding/riveting technologies.

2.3 Cooling System Integration

High power density motors generate significant heat; the V6s Plus motor necessarily employs advanced cooling solutions. Stator core design must optimize slot shapes and ventilation structures to ensure cooling medium (oil or water) can efficiently remove heat, preventing local overheating and performance degradation.

2.4 Lightweight and Compact Design

New energy vehicles are extremely weight-sensitive. The stator core must achieve maximum lightweighting while ensuring performance. This involves multiple technical aspects such as topology optimization design, material thinning, and structural innovation.

3. Our Customized Solutions: Empowering the Next Generation of Motors

Addressing the specific demands of high-end motors like the V6s Plus on stator cores, our factory has developed a complete system of customized capabilities:

3.1 Material Selection and Supply

• Strategic partnerships with top silicon steel suppliers like Shougang, Baosteel, JFE and Nippon Steel for stable supply of high-grade non-oriented silicon steel series.
• Provision of low-loss, thin-gauge silicon steel (full series 0.10mm-0.35mm) for high-frequency applications.
• Material performance testing and matching recommendations based on customer needs.

3.2 Precision Stamping and Manufacturing

• Multiple high-speed precision punching presses (maximum speed up to 1500 strokes per minute).
• In-house mold design and manufacturing capability, with precision up to ±0.005mm.
• Fully automatic lamination production lines, ensuring stator core stacking factor >0.98.
• Laser welding/self-clinching riveting processes to meet different structural strength requirements.

3.3 Heat Treatment and Surface Treatment

• Vacuum annealing production lines, effectively eliminating stamping stress and reducing core loss by 10-15%.
• Multiple insulation coating solutions (inorganic, organic, semi-organic) to meet different temperature resistance and insulation requirements.
• Anti-corrosion treatment to adapt to the complex operating conditions of new energy vehicles.

3.4 Inspection and Quality Control

• Full-dimensional coordinate measuring machines (CMM) to ensure geometric tolerances.
• Magnetic property testing systems capable of simulating actual operating conditions to test core loss.
• Metallographic analysis laboratory to monitor changes in material microstructure.

4. Collaboration Case Study: How We Helped a Client Break Through Technical Barriers

Last year, we collaborated with a well-known e-drive company to develop a stator core for a 20,000 rpm motor. Through the following technical solutions, we successfully helped the client achieve their performance goals:

• Material Optimization: Used 0.20mm thick 35ADG1700 silicon steel, reducing core loss by 18% compared to conventional materials.
• Slot Shape Innovation: Designed an asymmetric semi-closed slot, optimizing magnetic field distribution while ensuring slot fill factor.
• Cooling Integration: Designed an integrated oil channel structure at the stator core end, improving cooling efficiency by 30%.
• Process Breakthrough: Adopted segmented stamping + laser welding process, solving the deformation challenge in stamping ultra-thin silicon steel.

The final motor achieved 97.2% efficiency and a power density of 5.8 kW/kg, with all indicators reaching international advanced levels.

5. To Motor Designers and New Energy Vehicle Manufacturers

The launch of the 2026 Xiaomi SU7 marks that China's new energy vehicle motor technology has entered a "deep-water zone." High speed, high voltage, and high power density will become the standard for the next generation of motors. The foundation for all this lies in a high-performance "motor heart."