CHARGED Electric Vehicles Magazine – May-June 2019

The answer to that question

lay in what is Novonix’s flagship

product today: high-precision

coulometry technology.

HPC technology

The technology Burns and Stevens helped develop at Dalhousie was

called high-precision coulometry, or HPC. Coulometry is a measure-

ment technique that can be used to determine the performance of bat-

tery cells, but at the time, there were no coulometry systems that could

compare the high-performance cells needed for EV applications. The

testing methods that were available were both imprecise and slow.

“We developed equipment that could measure the efficiency of the

battery in the early cycles much more accurately than traditional equip-

ment,” Burns explained. “And what that allowed us to do was measure

the stability of the chemistry and the rate of degradation of the chem-

istry in only a matter of a few weeks, whereas [with] traditional testing

you’d have to run the battery for six months or a year or longer.”

Novonix says the improvement in equipment performance comes from

both the hardware design with turn-key systems and in the analysis

software. The company offers equipment that was designed to minimize

the sources of error in these coulometry measurements as well as differ-

ent thermal chambers that can be integrated into the systems for precise

temperature control of the batteries on test.

This technology made it possible to accelerate the development of new

battery designs, allowing manufacturers to iterate more quickly to find

longer-lasting designs.

“When scientists around the world are changing chemistries, trying

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THE TECH

Novonix equipment

was designed

to minimize the

sources of error in

these coulometry

measurements.

Images courtesy of Novonix