Lightweight, Flame-Retardant PU Encapsulant for Soft-Pack Battery Packs 6801-22-H
BZ-6801-22-H is a two-component polyurethane potting material developed specifically for new-energy soft-pack battery modules. It combines low density, UL94 V-0 flammability rating, and excellent flow characteristics to ensure complete filling and sealing of cell assemblies. With a 1:1 mix ratio by weight and Shore A 60±5 hardness, it offers light-weighting benefits and efficient heat dissipation while adhering to strict safety requirements. Fully RoHS/REACH-compliant, this product is suitable for global deployment and eco-conscious manufacturing.
Key Product Features
– Mass Reduction: Mixed density 1.09±0.03 g/cm³ lowers module weight, boosting energy density and extending EV/storage runtime.
– V-0 Fire Protection: UL94 V-0 rated, providing critical flame resistance for high-energy battery systems.
– High Fluidity: Viscosity 400–700 mPa·s enables thorough filling of narrow inter-cell gaps, preventing voids and ensuring thermal uniformity.
– Rapid Processing: Cures in 2.5–3.5 h at 25°C (or ≤40 min at 60°C), speeding production without sacrificing adhesion.
– Thermal Reliability: Stable from –40°C to 120°C, performing reliably in extreme cold and high-rate charge/discharge conditions.
Technical Parameters
|
Parameters |
Hardener BZ-6801-22-H A |
Resin BZ-6801-22-H B |
|
|
Before curing |
Appearance |
Light yellow clear liquid |
Light yellow liquid |
|
Viscosity(mPa·s.25℃) |
150-250 |
1300-1650 |
|
|
Initial mixed viscosity(mPa·s.25℃) |
400-700 |
||
|
Mixed density(g/cm³.25℃) |
1.09±0.03
|
||
|
Mixing & Curing
|
Mix ratio(by weight) |
A:B=1:1 |
|
|
Pot life 130±30g(min.25℃) |
8-10 min |
||
|
Curing condition |
Room temperature curing |
||
|
Surface drying time 30g(min.25℃) |
45-60 min |
||
|
Curing time 30g(H.25℃) |
2.5-3.5 |
||
|
Curing time(Heated) |
60℃ heated ≤40 min |
||
|
After curing
|
Color |
Light yellow |
|
|
Hardness (Shore A) |
60±5 |
||
|
Temperature resistance(℃) |
-40~120℃ |
||
|
Flame retardancy UL94 |
V0 |
||
|
Water absorption(24H) |
≤0.5% |
||
|
Volume resistivity(Ω.cm) |
≥1.0×1011 |
||
|
Tensile strength(Mpa) |
1.9 |
||
|
Tensile shear strength(Mpa)(Al-Al) |
1.7 |
||
|
Elongation at break(%) |
≥50% |
||
|
Breakdown voltage(kV/mm) |
≥15 |
||
Product Applications
- Battery Cell Gap Filling: Fills narrow inter-cell gaps, boosting thermal conductivity and reducing hot spots during charge/discharge.
- Module Structural Sealing: Seals modules against moisture and physical impact, ensuring EV/energy-storage durability.
- Thermal Interface Material: Lightweight thermal bridge between cells and cooling plates, enhancing heat dissipation and battery life.
- Safety Barrier: Flame-retardant interlayer that prevents thermal runaway spread between failed cells.
- Portable Energy Storage: Encapsulates soft-pack cells in power banks/solar generators, providing light protection and fire safety.
Directions for Use
- Pre-potting Preparation: Calibrate scales, prepare potting tools, cleaning tools, check machine settings, check vacuum pump force, etc.
- Product Pre-treatment: Place product on a level surface or fixture. Remove dust, clean, degrease, and dry if necessary.
- Accurate Proportioning: Manual operation requires precise mixing according to the specified ratio and recording. Machine potting requires calibrated ratios and first-article confirmation is recommended.
- Mixing & Stirring: Manual operation requires thorough stirring or using electric stirrers to ensure homogeneous mixing. Machine potting requires sufficient stirring speed, adjust as needed.
- Uniform Potting: Manual operation should be done in small, multiple batches to ensure uniformity. Machine potting should follow the programmed path for quantitative dispensing.
- Inspection or Secondary Potting: After potting, visually inspect as needed. Perform touch-up, bubble removal, or secondary potting if required.
- Curing: Allow the potted and inspected products to cure at room temperature or with heat assistance (recommended 60°C if needed), according to product and process requirements.
- Final Product Confirmation: Perform visual inspection and performance testing as required by the customer.
Packing
- Hardener: Typically 5KG/10KG/25KG/200KG metal or plastic drums.
- Resin: Typically 25KG/200KG metal or plastic drums.
![Conductivity Thermal Potting Compound Silicone For Transformer ODM BZ-3900-N1.5 1]()
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.