iso-BTC

Name: iso-BTC | Bench-top, battery performance testing, isothermal calorimeter
Brand: H.E.L Group

Fully customisable isothermal battery performance testing — small to medium cells

Measure heat generation and efficiency with true isothermal calorimetry and integrated charge–discharge cycling — revealing how chemistry, cell type and temperature drive real-world performance. Every system is fully customisable to your requirements.

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Isothermal

Calorimetry

−20 to 90 °C

Temperature range

255 × 275 mm

Test chamber

Coin – pouch cells

Cell formats

Integrated

Charge–discharge cycling

Thermal mapping

Optional

Why choose the iso-BTC?

See true heat generation

Isothermal calorimetry measures heat output under stable, real-world temperature conditions.

Test under load

Integrated charge–discharge cycling records performance and heat evolution simultaneously.

Understand your cells

Investigate the impact of chemistry, electrodes, cell type and age on performance.

Optimise thermal management

Model performance to inform enhanced thermal-management strategies.

What you can measure

Heat release profilesBattery efficiencyCharge / discharge capacityEfficiency vs temperatureHeat at different C-ratesCycle-life performanceThermal mappingHot-spot detection

Key specifications

Measurement type	Isothermal calorimetry
Temperature range	−20 to 90 °C
Test chamber	255 × 275 mm (W × D)
Cell & sample sizes	Coin, cylindrical, small prismatic & small pouch cells
Data acquisition	Up to 10 Hz
Instrument size (W×D×H)	600 × 550 × 750 mm

Software

The iso-BTC runs on H.E.L’s WinISO software — a fully configurable workspace with multi-step recipes, real-time data display, automated safety monitoring and rapid data capture, so you can adapt experiments on the fly and export results for analysis.

Full specifications are in the specification book and brochure.

Frequently asked questions

What is the iso-BTC used for?

An isothermal calorimeter for battery performance testing — measuring heat generation, efficiency and charge/discharge behaviour of small to medium cells under controlled conditions.

What cells can it test?

Coin, cylindrical, small prismatic and small pouch cells, with custom adaptors for various sizes.

What does isothermal testing tell me?

How efficiently a cell performs across temperatures and C-rates, and how chemistry, electrodes, cell type and age affect heat generation.

Can it cycle cells during testing?

Yes — an integrated charge cycler records performance and heat evolution simultaneously.

Does it support thermal mapping?

Yes — optional thermal mapping uncovers regions of higher heat generation and hot spots for targeted thermal management.

Is it customisable to my testing needs?

Yes. Options include integrated charge cycling, heat-capacity evaluation, thermal mapping and custom battery adaptors. Customisation is central to H.E.L’s approach.