We use cookies to improve your online experience. By continuing browsing this website, we assume you agree our use of cookies.

Why do lithium batteries use aluminum as the shell?

Views : 414
Author : XH-Jocelin
Update time : 2025-03-10 17:22:57
The core reasons for choosing aluminum shells for lithium batteries can be summarized as the following advantages:

1. Lightweight and economical
The density of aluminum (2.7 g/cm3) is only 1/3 of that of steel, which significantly reduces the weight of the battery and meets the lightweight needs of electronic devices and electric vehicles. The material and processing costs are low, and it is suitable for mass production.
2. Corrosion resistance and safety
Aluminum produces a dense alumina passivation film in a high-voltage environment (3.0-4.5V) to resist electrolyte corrosion and has excellent thermal conductivity
237 W / m . K ) Conducive to heat dissipation, with the design of safety valve
It can relieve pressure in time to reduce the risk of thermal runaway.
3. Conductivity and structural optimization
Aluminum is both the shell and the cathode current path, which can be seamlessly connected with the aluminum foil current collector to reduce internal resistance; Simplified structure
meter, improve the efficiency of energy transmission.
4. Processing adaptability
Aluminum has good ductility and is easy to stamping the complex shape of ↓-shaped, cylindrical or pouch cells; The laser welding technology is mature, the sealing is strong, and the water and oxygen intrusion are effectively isolated.
Exception: Nickel-plated shells are used in extreme environments or when high mechanical strength is required, but at the expense of lightweight and cost advantages. Summary: Aluminum shell has become the mainstream choice of lithium battery shell with the comprehensive advantages of lightness, corrosion resistance, conductivity, easy processing, good heat dissipation and low cost.
Related News
Read More >>
HiTHIUM Launches First Native 8-Hour LDES System at SNEC 2026 HiTHIUM Launches First Native 8-Hour LDES System at SNEC 2026
Jun .11.2026
Shanghai, June 3, 2026 – At SNEC 2026, HiTHIUM introduced what it calls the world's first native 8-hour long-duration energy storage (LDES) system: the ∞Power 6.9MWh ESS. The company also unveiled its new ∞Cell 650Ah large-capacity battery and the ∞Power 10+MWh product solution.
CATL Opens Massive New Energy Storage Test Lab in China CATL Opens Massive New Energy Storage Test Lab in China
Jun .09.2026
Xiamen, China – May 28, 2026. CATL has officially opened a major new testing facility in Xiamen. Called the Energy Storage Validation Laboratory (ESVL), the site aims to help move the global energy storage industry toward a new standard of real-world, system-level testing before projects are deployed. Covering 10 hectares and built with an investment of about 3 billion yuan (approx. $440 million USD), the company says it is the world’s largest and most comprehensive one-stop testing platform for energy storage systems. CATL intends to run it as an open facility, available for use by the wider industry worldwide.
EVE Energy Showcases Energy Solutions at 2026 World UAV Expo EVE Energy Showcases Energy Solutions at 2026 World UAV Expo
Jun .05.2026
The 2026 World UAV Expo and International Low-Altitude Economy & Unmanned Systems Exhibition (UASE 2026) recently concluded at the Shenzhen World Exhibition & Convention Center. The event gathered industry leaders, technology developers, and commercial operators from the global drone and advanced air mobility sectors. Among the prominent exhibitors was EVE Energy, which presented a comprehensive portfolio of energy solutions tailored for low-altitude aviation and robotics applications.