AReCoS

Electric vehicles

An EV heat pump designed to keep heating in the cold without stopping to defrost.

AReCoS is building its own air-source EV heat pump. Its air–water heat exchanger is designed to hold frost to a thin layer and clear it while the cabin keeps warming (patent pending).

One embedded controller is designed to run the heat pump, cabin and battery together. Pilots get the heat pump and controller as one package, targeted for summer–fall 2027; production programs license the control software.

Show the fallback and the shared design

If the frost-clearing system faults, the heat pump is designed to fall back to standard defrost and say so.

The controller is designed with the same control architecture and frost handling as the AReCoS rooftop unit.

Book a 20-minute call See how it works
AReCoS heat pump hardware and controller in an electric car An electric car in side view, driving along a road with outside air flowing into its grille and refrigerant moving through its circuit. At the front sits the AReCoS heat pump, with its air–water heat exchanger around the outdoor refrigerant coil, designed to keep frost thin, at the grille and joined to it by two refrigerant lines. The AReCoS controller above the car sends signals to the heat pump, the cabin and the fully charged battery under the floor. Warm and cool air blow into the cabin, a pipe links the heat pump to the cabin's HVAC module, and a pump drives coolant from the heat pump out to the battery and back again. AReCoS controller Air–water heat exchanger DESIGNED TO KEEP FROST THIN Cabin Battery Heat pump
The heat pump and its air–water heat exchanger at the grille, with one AReCoS embedded controller.

Watch

See how it works.

An illustrated explainer with captions.

How it works

Designed to set the whole thermal system together.

In the cold, frost can build on an EV heat pump's outdoor heat exchanger, so it may have to stop to defrost or fall back on the electric heater, which draws more from the battery. The AReCoS heat pump and its controller are being designed together to avoid both.

AReCoS control, with or without a heat pump AReCoS control, at the top, is designed to run either of two heating and cooling systems for an electric car: on the AReCoS controller and heat pump, or on the automaker's own thermal controller with A/C and an electric heater. Each system sends warm or cool air to the cabin and runs a pipe to the battery. In this illustration the battery shows more charge left with the heat pump than with the electric heater. AReCoS control With the heat pump OR A/C and electric heater CABIN BATTERY CABIN BATTERY
One control design: on the AReCoS controller and heat pump, or on your own thermal controller with A/C and an electric heater.

Designed to keep frost thin

Designed to keep the cabin heating with no reverse-cycle defrost in normal operation.

One controller

Designed to set the compressor, valves, pumps, front-end fan, blower and heater together from a physics model of the vehicle's thermal system, not loop by loop.

One architecture across your lineup

Each new vehicle program is designed to start from the architecture you have, so validation is a calibration, not a new design.

Work with us

Two ways to work with vehicle programs.

For pilots: the AReCoS heat pump and controller

The heat pump in development and its controller, one package for pilot vehicles.

Heat pump · Controller · Pilots

For production: the control software, licensed

Already have a heat pump, or A/C with a heater? AReCoS fits the control software to your cabin and battery systems, to run on your own thermal controller or your supplier's heat pump module. Licensed per vehicle, plus integration fees.

Fitted to your system · Licensed per vehicle

Pilots with vehicle programs are targeted for summer–fall 2027.

Let's talk.

Tell us about your vehicle program and its thermal system.

Book a 20-minute call info@arecos.net
625 Kenmoor Ave SE, Suite 350
Grand Rapids, Michigan 49546