What Types of Adhesive Tapes are Used in Lithium Battery industry?

Discover the types of Adhesive Tapes used in lithium battery, including High-temperature adhesive tape, Termination tape, Blue film tape and so on. Learn how Deson Insulation offer you some solutions about Lithium Battery industry.In this article, we will take a deep dive into the different types of Adhesive Tapes used in lithium battery and explore their unique features, benefits, and applications.

Why is lithium battery's Adhesive Tapes Important in lithium battery?

The Adhesive Tape used in lithium battery is much more than just bonding. Although it is an small subordinate part of the Lithium Battery, affects the insulation effect of lithium battery. Actually, it is a key safety functional component. Its influence is mainly reflected in the following aspects:

1. To directly prevent lithium battery's internal (core function) from Short circuit.

The internal structure of the battery is very tight, its positive pole and negative pole is separated only by a thin diaphragm.In the winding or laminating process,

The location of the Burrs on the edge of the electrode sheet and tab(contact points) are a potential danger point.

2. To maintain long-term insulation reliability.

Electrical working environment is extremely harsh: the internal organic electrolyte, the amount of heat produced during working, the material aging after long-term use. So, the chemical formula of the material of the tape directly determines the durability of its insulating effect.

3. To affect the overall structural integrity of the battery.

The tape also secures and binds the battery cells, ensuring they remain stable despite long-term vibration and use. Improper securing can cause internal structural displacement, potentially damaging the original insulation design and leading to short circuits.

Selecting the correct adhesive tapes for Lithium Battery is essential to maintain circuit structure that offer both safe and durability.

Types of Adhesive Tapes Used in Lithium Battery

1. High-temperature adhesive tape

Made with PET or PI film as backing, and coated with acrylic ester or rubber pressure-sensitive adhesion.It's also called Lithium battery pole ear protect tape and lithium battery insulation and pack tape. In recent years, the lithium battery industry has proposed that cells should not contain silicon, so the high temperature resist acrylic battery tapes are more popular.Its thickness is 0.03mm to 0.08mm.Used for high-temperature fixation and bonding of lithium battery casings, as well as for insulation protection of internal electrodes and external tabs of battery cells.

2. Flame-retardant double-sided tape

Mainly used for bonding components such as foam.

3. Thermal interface materials, such as thermal pads

Thermal pads are used to fill the air gaps between the heat-generating device and the heat sink or metal base. Their flexible and elastic characteristics make them suitable for covering uneven surfaces. They conduct heat from the separated device or entire PCB to the metal casing or heat spreader, thus improving the efficiency and lifespan of heat-generating electronic components.

Key Considerations When Choosing Adhesive Tapes for Lithium Battery

1. Adhesive Performance: Ensure strong initial adhesion, stable bonding, and resistance to electrolytes. High-quality tapes have low odor and maintain flexibility without cracking.

2. Base Material: Choose PI for high-temperature applications, PET for balanced performance.

Conclusion

Adhesive tapes are indispensable in lithium-ion batteries for insulation, fixation, and safety. Understanding their types, compositions, and applications helps us optimize performance and reliability. As the industry evolves, innovations like nano-enhanced and eco-friendly tapes will further enhance battery technology.