Passive Thermal Buffers for Electronics
Nano PCM, PCM rubber, and UltraST ultra-high-conductivity shape-stabilized phase-change material sit at the heat source — chips, power-battery packs, motor drives — absorbing the thermal peak as latent heat and releasing it slowly. Zero added energy, no fans, no throttling cliff.
Heat arrives in bursts. Cooling reacts too slowly.
1. Transient peaks throttle performance. A chip or motor drive doesn’t run at steady power — it spikes. Fans and heat sinks respond on a slow time constant, so the junction hits its limit and the device down-clocks before the cooling catches up.
2. Confined devices have nowhere to dump heat. Phones, tablets, robot vacuums, and compact power tools have no room for active cooling. Heat builds at the source and the whole enclosure climbs.
3. Battery life pays the price. Lithium cells age fastest when they run hot and unevenly. Every degree above the comfortable band, and every thermal gradient across the pack, costs cycles.
A phase-change layer sitting at the heat source absorbs the burst as latent heat — holding temperature flat through the transition, then bleeding it back out slowly once the load drops. It buys the slow cooling path time to keep up.
Representative junction response
Two ways to put PCM at the source.
PCM rubber gap pad
EDGE Microna-PCM microcapsules (down to 200 nm) compounded into an elastomer. Leak-free through the phase transition, it conforms to uneven surfaces and fills the gap between die and enclosure.
- PHASE POINTTunable 30–65 °C
- FORMSheet · die-cut pad · molded part
- SEALINGMicroencapsulated — no leakage on melt
- FIT FORPhones, tablets, robot vacuums, power tools
Shape-stabilized PCM heat block
PASSIVE EDGE® graphite-matrix shape-stabilized PCM — up to 20 W/(m·K) and rated for 20,000+ cycles. The graphite skeleton pulls heat in fast and spreads it evenly, so the latent capacity charges and discharges quickly.
- CONDUCTIVITYUp to 20 W/(m·K)
- CYCLE LIFE20,000+ charge / discharge cycles
- FORMMachined block · plate · custom geometry
- FIT FOREV battery packs, motor drives, modules
From the die to the pack.
Phone & tablet chips
A thin PCM pad over the SoC absorbs sustained-load bursts so the phone holds performance longer before it throttles.
EV & e-mobility packs
Shape-stabilized PCM between cells evens out the pack’s temperature gradient and caps the peak during fast charge and high draw.
Robot vacuums
PCM rubber wrapped around the battery gives the cells zero-energy temperature control through dock-and-run cycles. Deployed in a Mijia-ecosystem unit.
Power tools & modules
Motor drives, fast chargers, and outdoor power gear that run in bursts — PCM blocks soak the duty-cycle peak so the electronics stay in band.
Zero-energy battery control in a robot vacuum.
A robot vacuum’s lithium pack charges hard at the dock and discharges hard on the floor — a punishing thermal cycle in a sealed body with no room for active cooling.
Wrapping the cells in PCM rubber holds the pack inside its safe band and evens out the temperature across cells — with no added energy and no moving parts. The result was a markedly longer-lived battery and a longer service life for the machine.
Tell us about the hotspot.
The more of the following you can share early, the faster we can return a useful response. None of these constitute a commitment from either side.
Have operating data? Explore sizing tools
From hotspot to qualified part.
Thermal profile submitted
You share power, duty cycle, temperature limits, and stack-up. We return a written fit assessment within ~5 business days.
Material & form selection
Joint review of phase-change temperature, conductivity, and form factor — pad vs. shape-stabilized block — with predicted hold-band performance.
Bench sample
A sample part on a representative thermal load, instrumented for junction / cell temperature against your limit.
Qualification
Cycle, reliability, and integration testing against measured data. Decisions to scale are made on evidence, not promises.
Build your internal case.
PCM rubber data package
Phase-point options, latent capacity, conformability, microcapsule size distribution, dielectric and flammability characteristics, cycle stability.
Shape-stabilized PCM spec sheet
Graphite-matrix conductivity curves, latent heat, 20,000-cycle stability data, machined-geometry options, and integration notes.
Battery-pack application note
Cell-to-cell gradient control, fast-charge peak shaving, pack-level integration patterns, and a bench test scaffold.
Share your power profile, temperature limit, and stack-up.
How it works
- Heat source and cooling structure
- PCM heat buffer layer
- Phase change material and integration interface
During lower loads, suitable heat dissipation conditions prepare PCM for the next event.
During a brief power increase, PCM absorbs some heat and buffers device temperature changes.
Heat leaves through the existing dissipation path. Continuous cooling remains part of the overall thermal design.
Structures and cycles illustrate the principle. Selection, capacity and performance depend on operating conditions and validation.