Lithium battery tape

Made with PP/PET/PI film and electrolyte-resistant acrylic adhesive. Available in 0.016-0.05mm thicknesses. Provides insulation, strong adhesion, and flame resistance for lithium-ion battery protection.

High-temperature lithium battery tapes are made from insulating materials (PP, PET, or PI films) coated with a lithium battery electrolyte-resistant acrylic adhesive. Available in thicknesses of 0.016mm, 0.020mm, 0.03mm, 0.035mm, 0.04mm, and 0.05mm, they are specifically designed for insulating and securing lithium-ion battery cells and other components. They offer strong electrolyte resistance, high adhesion, excellent conformability, and are environmentally friendly and flame-retardant.

Production Process Flow

From raw materials to finished product, every step is rigorously controlled to ensure consistent and reliable performance.

  • ​Base Material: High-temp films like PI, PET, or PTFE (10–50μm thick).
  • ​Adhesive: Silicone or acrylic-based, with heat-resistant additives (e.g., silane coupling agents).
  • ​Accessories: Release paper (protects adhesive), solvents (toluene/MEK for dilution).
  • ​Surface Cleaning: Plasma or chemical treatment to remove impurities and improve adhesion.
  • ​Primer Coating​ (optional): Enhances bonding between base and adhesive.
  • Methods:
    Transfer Coating: Adhesive applied to release paper first, then transferred to base.
    Direct Coating: Adhesive applied directly to base (requires precise thickness control).
  • ​Drying: Oven-dried at 80–150°C to evaporate solvents.
  • ​Release Paper Lamination: Protects adhesive layer.
  • High-Temp Curing: Some adhesives require curing at 120–180°C for enhanced heat resistance.
  • ​Slitting: Cut into custom widths (e.g., 5mm, 10mm).
  • Rewinding: Rolled to standard lengths (e.g., 50m, 100m/roll).
  • ​Die-Cutting​ (optional): Shapes like circles or squares.
  • ​Packaging: Dust/moisture-proof (cardboard or anti-static bags).
  • Heat Resistance Test: 200°C for 1 hour (no warping/delamination).
  • ​Adhesion Test: 180° peel strength (≥1.5N/cm).
  • ​Insulation Test: Withstands ≥5kV.
  • ​Visual Inspection: No bubbles, impurities, or scratches.

Power battery blue film tape

Lithium-battery-termination-tape

Lithium battery termination tape

Lithium-battery-tab-tape3

Lithium battery tab tape

Ni-MH-battery-tape2

Ni-MH battery tape

Glass-cloth-tape

Glass fiber tape

Lithium-Expansion-Tape-

Lithium battery expansion tape

Lithium battery tape Series Specification Sheet

Name ltem No.Model Material Colour Adhesive standard size Tack Adhesion Strength Tensile Resistance Exten- sibility Voltagewithstand Temperature tolerance
thick/mm wide/mm long/m N N/25mm N/25mm % ℃
Power battery blue film tape PT11A PET blue acrylic acid 0.11 950 50/100 3.5↑ 10↑ 150↑ 45 5kv 120
Power battery blue film tape PT08A PET blue acrylic acid 0.08 950 50/100 4↑ 10↑ 120↑ 40 5kv 120
Lithium battery termination tape PP03G BOPP green Electrolyte Resistant PSA 0.035 500 100/200 0.5↑ 3↑ 60↑ 80 3kv 130
Lithium battery termination tape PP05G BOPP green Electrolyte Resistant PSA 0.05 500 100/200 3↑ 7↑ 60↑ 80 3kv 130
Lithium battery termination tape PP02G PET green Electrolyte Resistant PSA 0.016 500 100/200 3↑ 7↑ 60↑ 80 3kv 130
Ni-MH battery tape PP09A BOPP yellow rubber 0.085 580 100/200 3↑ 5↑ 100↑ 50 4kv 80
Lithium battery tab tape KA03D PI golden yellow rubber 0.035 500 100/400 3↑ 2↑ 90↑ 50 3kv 130
Lithium battery tab tape KA04D PI golden yellow rubber 0.045 500 100/200 1↑ 2↑ 110↑ 30 3kv 130
Lithium battery tab tape KA06D PI golden yellow rubber 0.055 500 100/400 3↑ 7↑ 130↑ 50 5kv 130

Technology Showdown: PET Tape vs. PI Tape

The choice of base material is critical for lithium battery tapes. While both PET and PI films provide excellent insulation, their differences in thermal performance, mechanical properties, and cost have a profound impact on application suitability.

PET (Polyester) Base Tape

  • High Cost-Effectiveness: Lower material cost makes it ideal for consumer electronics and applications where budget is a key driver.
  • Excellent Mechanical Strength: High tensile strength and puncture resistance, suitable for automated high-speed wrapping.
  • Good Insulation: Provides reliable dielectric strength for standard operating voltages in most battery applications.
  • Multiple Colors: Available in various colors (blue, green, yellow) for easy identification and process control.

  • Moderate Temperature Resistance: Typically rated for continuous use up to 130°C, not suitable for processes involving high-temperature exposure.

PI (Polyimide) Base Tape

  • Superior High-Temp Performance: Can withstand continuous temperatures of 180°C to 260°C, essential for power batteries and demanding applications.

  • Excellent Dimensional Stability: Maintains its shape and size across a wide temperature range with minimal shrinkage.

  • High Dielectric Strength: Offers top-tier electrical insulation, providing a greater safety margin in high-voltage systems.
  • Higher Cost: The raw material and manufacturing process are significantly more expensive than PET.
  • Limited Color Options: Typically only available in its natural amber color.

Functions, Uses, and Applications

Lithium battery tape is an essential high-performance material in battery manufacturing. Its core function is to provide insulation, fixing, and protection throughout the complex cell and pack assembly workflow.

Electrical Insulation

Provides critical dielectric separation between electrodes, tabs, and metallic components, preventing internal short circuits that could lead to thermal events.

Structural Fixing

Secures the termination of electrode windings (termination tape) and bundles cells together in modules, enhancing mechanical stability and resistance to vibration.

Process Protection

Masks and protects sensitive areas like electrode tabs and weld points from physical damage, chemical corrosion from electrolyte, and contamination during assembly.

Primary Application Fields

Our product is widely used in the manufacturing process of various lithium-ion battery formats:

  • Cylindrical & Prismatic Cells (e.g., termination, insulation)
  • Pouch Cells (e.g., tab sealing, corner protection)
  • Battery Modules (e.g., cell-to-cell insulation, busbar wrapping)
  • Battery Packs (e.g., fixing sensors, wire harnessing)

Quality Standards & Certifications

We are committed to delivering the highest quality products, a promise backed by strict internal standards and authoritative third-party certifications.

Appearance Standard

Tape surface is smooth and free of defects like bubbles, scratches, or impurities. Edges are clean with no adhesive bleed.

Performance Consistency

Each batch is tested for key performance indicators like peel strength to ensure stable and reliable performance.

Dimensional Tolerance

Strict control over width and thickness tolerances ensures high consistency for automated production lines.

Third-Party Inspection & Certification

ISO 9001:2015

Quality Management System certification, demonstrating our ability to consistently produce high-quality products.

RoHS Directive

Products are free of hazardous substances, complying with EU environmental standards for user and environmental safety.

REACH Regulation

Compliant with EU chemical regulations, ensuring a high level of protection for human health and the environment.