Li-Ion Battery Specific Insulating Tape – Engineered for Cell Tab Termination

In the precise world of lithium battery manufacturing, every detail is critical. If the termination points of the internal tabs are not properly handled, it can lead to catastrophic consequences like internal short circuits, performance degradation, or even thermal runaway. Our Lithium Battery Termination Tape is designed to address this key risk. It is an ultra-thin, highly insulating specialty tape whose mission is to securely fasten and isolate the ends of the anode and cathode tabs during the cell winding process. It’s like building an invisible firewall inside the battery, ensuring the cell’s structural integrity, stable electrical performance, and long-term safety.

Core Advantages & Key Features

• Exceptional Electrical Insulation Properties As an insulating barrier for the tabs, the dielectric strength of termination tape is paramount. Our product uses proprietary materials and technology to ensure it provides excellent high-voltage insulation capability at an extremely thin thickness, effectively preventing internal short circuits between the anode and cathode.
• Superior Electrolyte Resistance The internal environment of a battery cell is complex, and the electrolyte is highly corrosive and chemically active. Our termination tape is rigorously tested to remain stable when immersed in the electrolyte over the long term, without degrading, swelling, or losing adhesion. This ensures it works reliably throughout the battery’s entire lifecycle.
• Ultra-Thin Design for Perfect Conformity To avoid affecting the winding precision and overall thickness uniformity of the cell, our termination tape is designed to be extremely thin, with a total thickness as low as 0.05mm. It conforms perfectly to the tab surfaces without creating any bumps, ensuring the cell’s internal structure is compact and stable, and avoiding performance issues caused by unevenness.
• Strong and Durable Adhesion The tape must withstand the tension of cell winding and various stresses during use. Our high-performance adhesive has a strong peel adhesion, ensuring the tape can permanently and securely fasten the tabs in their designated position, unaffected by vibration or temperature changes.

Technical Specifications

• Backing Material: PET / Polyimide / Specialty insulating film

• Adhesive Type: Acrylic / Silicone (high-temperature resistant)

• Color: Transparent, Yellow, or Custom

• Thickness: 0.05mm – 0.2mm

• Temperature Resistance: -40°C to +150°C (customizable)

• Width & Length: Customizable

Typical Applications

• Cylindrical Cells: Used to fasten the start and end points of the anode and cathode tabs during the winding process.
• Prismatic and Pouch Cells: Used for tab fastening and insulation during the stacking and winding processes.
• All Types of Lithium-Ion Batteries: Including power batteries, energy storage batteries, and consumer electronics batteries, ensuring the stability of the internal structure.

Client Testimonials & Case Studies

“On our battery cell production line, we have a strict material selection process for every step. The ultra-thin design and stable electrolyte resistance of this termination tape have solved a long-standing problem for us. It ensures our cells maintain exceptionally high safety and performance consistency during long-term cycle testing, giving us confidence to win our clients’ trust.” — R&D Director, a power battery manufacturer

Frequently Asked Questions (FAQ)

• Q: What is the difference between termination tape and regular insulating tape? A: The difference is huge. Termination tape is specifically designed for the battery’s internal environment; it must have the two key properties of electrolyte resistance and being ultra-thin. Regular insulating tape cannot survive in the chemical environment inside a battery, and its thickness would affect cell performance.
• Q: Why are different colors used for termination tape? A: Different colors are typically used to distinguish between different materials or specifications, allowing for quick identification and management on the production line.
• Q: At which stage of battery production is this tape used? A: It is primarily used during the cell winding or stacking process to secure the internal anode and cathode tabs. Its performance directly affects the final safety and performance of the cell.