Electric-vehicle battery packs rely on several polyurethane (PU) parts for thermal management and protection: cell and module encapsulation foam, potting compounds, thermally conductive gap fillers and pack-housing gaskets. Yongjia builds the high- and low-pressure PU machines that produce these parts. We supply the processing equipment, not the raw material — our machines run with your own or sourced polyol and isocyanate system, so you keep full control of your formulation.
Where PU Fits: Cell, Module and Pack Level
An EV battery is built up from cells into modules into the pack. Polyurethane parts are used at every level — and the same foaming or dispensing platform can cover them:
| Battery level | PU part | Our machine |
|---|---|---|
| Cell | Thermally conductive gap filler between cells and the cooling plate | Two-component metering-mixing dispensing machine |
| Module | Encapsulation / potting foam to fix cells, damp vibration and slow flame spread | Low- or high-pressure foaming machine |
| Pack | Structural foam for rigidity, plus FIPG gasket sealing the pack housing | High-pressure foaming machine / FIPG gasket dispensing machine |
With cell-to-pack (CTP) and cell-to-chassis (CTC) designs removing the module layer, encapsulation foam, structural foam and sealing become even more important — raising PU demand and the need for reliable dispensing and foaming machines.
Which Machine Produces Each Battery Part
- Cell & module encapsulation / potting foam — poured or injected to fix cells, damp vibration, block moisture and slow thermal propagation. Produced on our low-pressure PU foaming machine or high-pressure foaming machine.
- Thermally conductive gap filler — liquid-dispensed between cells and the cooling plate for efficient heat transfer. Produced on a two-component metering-mixing-dispensing machine.
- Battery pack housing sealing (FIPG) — formed-in-place PU gasket on the pack tray and lid for sealing and ingress protection. Produced on our FIPG PU gasket dispensing machine.
- Structural foam — lightweight rigid PU that adds pack rigidity and holds cells. Produced on our high-pressure foaming machine.
Why Manufacturers Choose PU for These Parts
PU lets a battery maker combine several functions in one poured or dispensed material — thermal management, vibration damping, moisture protection and structure — at low weight and with high automation. Liquid-dispensed PU also wets out rough surfaces better than pre-cut pads, giving closer contact and more consistent heat transfer.
What Our Machines Give You
- Precise two-component metering for consistent ratio, density and thermal performance part to part.
- Self-cleaning mixing head for stable output and low downtime on continuous lines.
- Wear-resistant metering option — thermally conductive gap fillers carry abrasive ceramic or metal fillers, so we can configure wear-resistant pumps and mixing heads to protect the machine and hold accuracy.
- Automation-ready — integrates with robots, jigs and pack conveyors for volume battery production.
- Customizable output — matched to your part size, shot weight and daily volume.
The Same Machines Make Under-Hood Insulation
Our foaming machines also produce molded PU under-hood and engine-bay insulation — the acoustic and thermal foam that cuts cabin noise and protects the hood. One machine platform can serve both your battery and automotive insulation parts by changing the mould and program.
FAQ
Do you supply the polyurethane raw material?
Can your machine dispense abrasive thermally conductive gap fillers?
High pressure or low pressure for battery potting and encapsulation?
Can one machine make both battery parts and under-hood insulation?
Tell us your battery or automotive PU part and volume — we will propose the right high- or low-pressure machine and quote.