E-Mobility Engineering 017 l ECE Doosan electric excavators dossier l In Conversation: Matt Faulks l Battery testing focus l Battery Show North America 2022 report l Ariel Hipercar digest l Cathode materials insight l Thermal management focus

Supply and demand H eld in Novi, Michigan, in mid-September, the Battery Show North America focused attention on numerous new products, from test equipment for battery development and manufacture to batteries, safety devices, power electronics and advanced sensing concepts. Novonix supports battery development with ultra-high precision coulometry (UHPC), which the company describes as a vital tool in the development of new cell chemistries and designs. Novonix representatives presented their new 10 A UHPC battery cycler module with eight channels at the show. A coulomb is a fundamental unit of electric charge – the number of electrons that pass a given point in a second to produce a current of 1 A. In the battery field, however, capacity is typically measured in ampere hours (Ah). UHPC measures capacity by making extremely accurate and precise measurements of current, voltage and time through multiple charge and discharge cycles of cells under test, explained Alex Parkinson. Traditionally, he said, testing a new cell involves connecting it to a battery cycler then charging and discharging it repeatedly, and analysing current, time and voltage data to draw inferences about what is happening in the cell and how it performs. UHPC, he said, uses extreme accuracy and precision in measurement to “unlock a new class of high-resolution data” that can contribute to very high fidelity models, which can be used to understand a battery’s electrochemistry and the mechanisms by which it might fail. He was, however, keen to stress that UHPC alone does not predict cell life. “What UHPC can do is deliver very good data, including data you just can’t get otherwise.” Parkinson noted that the accurate and precise measurement capabilities embodied in the company’s hardware comes from good circuit design, with great effort put into tackling all sources of error, including temperature fluctuations and vibration for example. Peter Donaldson provides some highlights of this key event, focusing on new products and technologies that o er solutions to pressing challenges The 10 A UHPC module is designed to integrate with existing Novonix 20 and 2 A modules 44 January/February 2023 | E-Mobility Engineering The Battery Show Europe was well-attended, with new solutions for thermal management to the fore, among many other advanced technologies