The design of gears for new energy vehicles needs to meet a series of performance requirements to ensure that they can work efficiently and reliably during vehicle operation. Here are some key performance requirements:

1. High torque carrying capacity: New energy vehicle gears need to be able to withstand the high torque generated by the electric motor, especially during start-up and acceleration.

2. Low noise and vibration: In order to improve driving comfort, gear design should minimize noise and vibration as much as possible to ensure smooth operation.

3. High efficiency: The gear transmission system should have a high transmission efficiency to reduce energy loss and improve the energy efficiency of the vehicle.

4. Lightweight: In order to reduce vehicle weight, gear design should adopt lightweight technology, such as using high-strength materials, optimizing tooth profile and structural design.

5. Corrosion resistance: Gears should be able to maintain good performance under different environmental conditions, including moisture resistance, salt spray resistance, etc.

6. Wear resistance: The gear surface should have high wear resistance to extend its service life and reduce maintenance costs.

7. Good heat treatment: Gear materials should undergo appropriate heat treatment to improve hardness and toughness, ensuring that performance can still be maintained under high temperature and heavy load conditions.

8. Precise machining: The machining accuracy of gears should be very high to ensure the accuracy of tooth profile and surface smoothness, and reduce noise and vibration.

9. Reliability and Durability: Gear design should ensure stability and reliability over prolonged use, reducing failure rates.

10. Cost effectiveness: While meeting performance requirements, the design and manufacturing of gears should consider cost-effectiveness to reduce production costs.

11. Adaptability and compatibility: Gear design should adapt to different motors and transmission systems to ensure good compatibility and interchangeability.

12. Easy to maintain and replace: Gear design should consider easy maintenance and replacement to reduce maintenance costs and improve repair efficiency.

13. Compliance with regulations and standards: The design and manufacturing of gears should comply with relevant national and international standards to ensure product compliance.

Meeting these performance requirements requires comprehensive consideration of multiple aspects such as material selection, design parameters, manufacturing processes, and testing verification of gears. By adopting advanced materials, design, and manufacturing technologies, it is possible to ensure that the gears of new energy vehicles can maintain high performance and reliability under various operating conditions.