What Are The Main Shell Materials Of Lithium Batteries?

Lithium batteries are rechargeable batteries known for their high energy density, long life and low self-discharge rate. They are usually made of lithium metal or lithium alloys and are widely used in portable electronic devices, electric vehicles and energy storage systems. Lithium batteries are lightweight and small in size, but they need to pay attention to overcharging and overheating safety issues. The aluminum battery case is a very important accessory in lithium batteries. The general shell materials of lithium batteries include PVC shell, plastic shell, metal shell, and aluminum shell.

1. PVC (polyvinyl chloride) shell.

Advantages: PVC is widely used in various industries due to its versatility, affordability and easy processing. PVC shells provide lithium batteries with high cost performance, flexible plasticity, and good electrical insulation.

Notes: PVC has limited durability, especially when it may degrade under high temperature, ultraviolet radiation or chemicals. In addition, the production and disposal of PVC may release toxic chlorine-based compounds, causing environmental problems.

2. Plastic shell.

Advantages: Plastic shells are lightweight, flexible in design, and can be easily molded into complex shapes to achieve creative battery designs. Plastic aluminum battery case are generally more corrosion-resistant than metal shells.

Note: Some types of plastics may not be able to withstand high temperatures, which may cause deformation or battery performance degradation. Plastic housings may have low impact resistance, depending on the plastic material used.

3. Metal housings (including steel and aluminum).

Advantages: Metal housings are known for their ruggedness and durability, providing excellent protection against physical damage.  Battery shell can effectively dissipate the heat generated during battery operation, contributing to overall safety and performance. Metal housings also provide electromagnetic shielding to prevent interference with other electronic devices.

Note: Metal housings are relatively heavy and may not be suitable for some portable applications. Aluminum housings may require coating or treatment to prevent corrosion.

4. Aluminum Shell.

Advantages: Aluminum case for new energy cars have a high strength-to-weight ratio and a lightweight design that is easy to move. Aluminum's high thermal conductivity facilitates efficient heat dissipation, which contributes to battery safety. Aluminum shell often have a sleek, modern appearance that is attractive to consumers.

Note: Aluminum case may be more expensive to produce than other materials. Although aluminum itself is a conductor, proper insulation is required to prevent short circuits.

5. Aluminum-plastic film (soft pack).

Advantages: Soft pack lithium batteries use aluminum-plastic film as the shell, which has the advantages of high energy density and low weight, and are suitable for applications that require lightweight design.

Notes: Soft pack batteries use aluminum-plastic film as the packaging material in structure, and require thermal packaging, which may increase the complexity and cost of manufacturing.

The choice of each shell material depends on the specific application requirements, cost considerations, performance requirements and safety standards. When designing lithium batteries, manufacturers must carefully evaluate these factors to select the shell material that best suits their specific usage. Our company can provide you with lithium battery aluminum shells and covers of various specifications, and we can also customize them according to customer requirements. If you are interested in our products, please feel free to contact us.