BTMS — keep every cell in its happy band
Cells live longer and perform better within a tight temperature window. We engineer the thermal system that keeps them there.
Liquid, air, or hybrid — matched to your C-rate and packaging
The cooling architecture is chosen from the duty cycle up. Fast-charge and utility ESS get liquid. Stationary and moderate-C run air. Packaging-constrained builds go hybrid.
Liquid-cooled
For high C-rate applications — fast charge, high-power motive, utility ESS. Dielectric coolant or glycol loop running through cold plates, with pump and chiller integration engineered to your pack geometry and duty cycle.
Air-cooled
For moderate C-rate applications — stationary ESS, low and medium voltage motive. Fans with variable-speed control, airflow paths engineered around module geometry, and balanced inlet-to-outlet delta-T across the pack.
Hybrid
Liquid for the cells, air for the balance-of-system. For packaging-constrained applications where weight, volume, or serviceability rule out a single-medium approach.
Heating for packs that have to work in the cold
Lithium chemistries lose capacity and accept charge poorly below 0°C. We build the heating in from day one — resistive, coolant-loop, and climate-aware control.
Resistive heating
Heat pads bonded to module surfaces. For packs operating below 0°C — cold storage, outdoor ESS, winter motive power. Controlled by the BMS against cell temperature, not ambient.
Coolant loop heating
For liquid-cooled systems, an inline heater pre-conditions the coolant before it reaches the cold plates. The pack warms up before charging starts — no plating, no capacity loss.
Climate profiles
BMS triggers heating automatically based on cell temperature, charge request, and site profile. No operator intervention. The pack runs itself inside its safe and efficient band.
Sensing, isolation, and BMS-integrated control
The thermal system lives inside the BMS loop, not alongside it. Sensors at the cell, barriers at the module, thresholds tuned to the chemistry.
Cell-level NTC sensors
Every module, not sampled. Temperature read at the cell group, not inferred from pack ambient. The BMS sees what the cells feel, and responds before drift becomes damage.
Thermal runaway isolation
Module-level fire barriers aligned with UL 9540A requirements. A cell-level event stays at the cell level. Propagation paths are engineered closed, not left to chance.
BMS-integrated control
Temperature thresholds set per chemistry. LFP runs different setpoints than NMC, and both run different setpoints than a cold-chain outdoor deployment. We tune the control loop to the pack and the duty cycle.
The thermal system is the difference between a 10-year pack and a 3-year pack
LFP degrades fast above 45°C. NMC thermal runaway starts around 150°C. The thermal system is what keeps the pack safe and lasting 10+ years — designed to your duty cycle, not a reference.
Tell us the duty cycle. We’ll engineer the thermal system.
Send a spec, a deployment environment, or a first sketch. Back comes a BTMS scope and a matching pack program.