Coolant Plate Thermal Pad 1.5 mm LG
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A 1.5 mm silicone thermal pad, cut to 318 by 99 mm to suit an LG battery module, that goes between the module and its coolant plate. One per module.
Two surfaces that look flat are not, and the air trapped between them is a better insulator than almost anything else in the pack. The pad deforms under clamping load into every hollow in both faces and gives the heat a continuous path out of the cells and into the coolant.
It does a second job that matters more. A module face sits at pack potential and a coolant plate is usually bonded to the vehicle. The pad keeps them apart electrically while still conducting heat, with a breakdown strength above 5 kV per millimetre. That is why the pad is not optional and why nothing improvised belongs in its place.
Match the thickness to the module. This 1.5 mm pad is for LG modules, which sit closer to the plate. CALB modules take the 3 mm pad instead. Fitting the wrong one either leaves a gap the pad cannot bridge, or over compresses it and bows the plate.
Key specifications
| Manufacturer part | TP318X99X15 |
|---|---|
| Suits | LG battery modules |
| Dimensions | 318 x 99 x 1.5 mm |
| Thermal conductivity | 4 W per metre kelvin |
| Breakdown voltage | Above 5 kV per millimetre |
| Volume resistivity | 1 x 10^10 ohm cm |
| Hardness | Shore C 15 to 60 |
| Specific gravity | 2.7 g per cm³, plus or minus 0.1 |
| Tensile strength | 3 kg per cm² |
| Continuous use temperature | -40 °C to +240 °C |
| Flame rating | UL94 V-0 |
| Colour | Blue |
| Weight | 0.11 kg |
| Supplied | Individually. One per module |
Features
- Conducts at 4 W per metre kelvin, which is high for a compressible pad
- Isolates to over 5 kV per millimetre, keeping a module at pack potential clear of a grounded plate
- Soft enough to fill the hollows in both faces under clamping load
- V-0 flame rated and stable to 240 °C
- Cut to size, so there is no trimming and no offcuts
Compatibility
For LG modules against a coolant plate. Order one per module, and remember both faces of a plate sandwiched between two modules need their own pad.
For CALB modules use the 3 mm pad, which is the same material in the same footprint at twice the thickness.
Fit it dry and clean. The pad relies on contact area, so anything left on the faces costs thermal performance exactly where it is hardest to recover.
In the box
- 1 x thermal pad, 318 x 99 x 1.5 mm
Downloads
No separate datasheet is published. The material properties in the table above are the full published specification for this pad.
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