With the transformation of the global energy structure, the new energy vehicle industry has developed rapidly. As the core component of new energy vehicles, the safety, stability and durability of the battery case have an important impact on the performance of the whole vehicle. Battery shells are usually made of high-strength, lightweight metal materials or composite materials, and mechanical Polishing technology plays a key role in the manufacturing process of battery shells. This paper will focus on the new energy battery shell mechanical polishing technology to explore.

First, the new energy battery shell material and requirements

1. Material

New energy battery shell is mainly made of the following materials:

(1) Aluminum alloy: with good strength, lightweight and corrosion resistance, widely used in the manufacture of new energy vehicle battery shell.

(2) stainless steel: with high strength and corrosion resistance, it is suitable for the manufacture of battery shell with higher requirements.

(3) Composite materials: such as carbon fiber composites, with high strength, low density and excellent impact resistance.

2. Requirements

The quality requirements of the battery shell mainly include:

(1) Dimensional accuracy: the dimensional accuracy of the battery shell directly affects the performance of the vehicle, so the dimensional accuracy of the polished battery shell has strict requirements.

(2) Surface quality: the surface quality of the battery shell is related to the sealing performance and corrosion resistance of the battery shell, and requires a smooth surface, no scratches, no pits and other defects.

(3) structural strength: the battery shell should have enough structural strength to withstand the weight of the internal battery components and the impact of the external environment.

Second, new energy battery shell mechanical polishing technology

New energy battery shell mechanical polishing technology mainly includes the following links:

1. Deburring: deburring equipment is used to deburr the battery shell to eliminate the burrs generated in the casting, cutting and other processes.

2. Rough polishing: Use rough polishing wheel to roughly polish the battery case to remove surface scratches, pits and other defects. 3.

3. middle polishing: use the middle polishing wheel to polish the battery case, further refine the surface texture and improve the surface quality.

4. fine polishing: use the fine polishing wheel to carry out fine polishing treatment on the battery case to make the surface smoother and achieve the required dimensional accuracy.

5. fine polishing: use fine polishing wheel to fine polish the battery case to ensure that the surface quality meets the requirements of high precision.

6. cleaning: the polishing process will produce oil, dust and other impurities, the battery shell for cleaning to ensure that the surface is clean.

7. Inspection: The polished battery case is inspected for size, surface quality and other items to ensure that it meets the quality requirements.

Third, the development trend and outlook

With the rapid development of new energy automobile industry, the quality requirements of battery shell are getting higher and higher. The Application of mechanical polishing technology in battery shell manufacturing will also be more extensive. In the future, the development trend of new energy battery shell mechanical polishing technology mainly includes:

1. automation, intelligence: with the development of robotics, artificial intelligence and other technologies, the battery shell polishing process will be automated, intelligent, improve production efficiency and product quality.

2. Environmental protection: in the polishing process, reduce the production of oil, dust and other impurities, reduce the impact on the environment.

3. High efficiency: research new polishing process and equipment, improve polishing efficiency, shorten the production cycle.

4. Personalization: for different materials, different requirements of the battery shell, the development of customized polishing process and equipment.

In short, new energy battery shell mechanical polishing technology in the battery shell manufacturing is of great significance. With the rapid development of the new energy automobile industry, the quality requirements of the battery shell continue to improve, mechanical polishing technology will continue to optimize and upgrade, laying a foundation for the prosperous development of the new energy automobile industry.