Module to Pack – Thermal Conductive Gap Filling
PRODUCT DESCRIPTION
Module to Pack – Thermal Conductive Gap Filling is a solution for filling the gap between the battery module and the pack casing using high thermal conductivity materials. This helps effectively dissipate heat, protect the battery from overheating, and enhance the stability of lithium-ion battery systems.
Product details
Application
▪ Cell/Module and Water-Cooling board gap
filling
Key Requirement
▪ High Thixotropy –>limited flow
▪ Room Temp. Cure –>No heat
▪ Thermal Conductivity ≥2 w/mk
▪ Low Density
▪ Anti Flammable –> V-0
▪ Good stability, anti-environment and
dielectric
Solution
▪ Low density Silicone Gap Filling
Weldtone Product Line
| Products | TF3221 | TF3235 | TF3220 （UD） | TF3230（UD） |
| Thermal Gap Filling | ||||
| Formulation | Silicone based | |||
| Usage temp. rang | -60-200’C | -60-200’C | -60-200’C | -60-200’C |
| Viscosity， cps | 35000-48000 | 150,000 | 35000-48000 | 35000-48000 |
| Density， g/cc | 2.8 | 3.0 | 2.0 | 2.3 |
| Hardness（shore 00） | 50 | 35 | 50 | / |
| Thermal conductivity， W/m.K | 2.1 | 3.5 | 2.0 | 3.0 |
| Cure condition | RT or heat cure | RT or heat cure | RT or heat cure | Pre-cure |
| Mix ratio | 1： 1 | 1： 1 | 1： 1 | One part |
| Flame rating | 94V-0 | 94V-0 | 94V-0 | 94V-0 |
| Dielectric Strength(kV/mm) | 10 | 10 | 10 | 10 |
| Volume Resistivity (ohm-cm) | >1.0×10^12 | >1.0×10^12 | >1.0×10^12 | >1.0×10^12 |
| Self life， month@25C | 6 | 6 | 6 | 6 |
| Shear strength（Mpa） | / | / | / | / |
🔹 Gap Filler Silicone – Soft, flexible, capable of filling gaps, and highly heat-resistant.
🔹 Thermal Conductive Gel – Highly adaptable and easy to apply.
🔹 Phase Change Material (PCM) – Absorbs heat when the temperature rises, helping with thermal management.
Advantage
✅ Heat dissipation – Facilitates heat transfer from the battery module to the cooling system, reducing the risk of overheating.
✅ Mechanical protection – Absorbs vibrations, reducing stress on battery cells.
✅ Electrical insulation – Prevents short circuits between the module and the pack.
Product Applications
🚗 Electric Vehicle Batteries (EV, HEV, PHEV) – Fills the gap between the module and pack to enhance thermal dissipation.
⚡ Battery Energy Storage Systems (BESS) – Maintains battery temperature stability during long-term operation.
🛰 Aerospace Batteries – Ensures thermal performance in extreme environments.
