Optimising thermal management in EV batteries 25 May 2023

Specially designed to enable thermal management in EV batteries, Lohmann offers its new DuploCOLL TC (Thermally Conductive) range of acrylic transfer tapes to provide thermal conductivity of up to 2 W/mK, which the company states was tested according to ASTM D 5470.

With the rapid advancements in the EV battery sector and digitalisation as well as miniaturisation on the rise, high-tech tape manufacturer Lohmann offers customised bonding solutions to the Li-Ion battery sector that do more than just bond. Their innovative multifunctional materials product range contains adhesive tape solutions that also offer functions such as damping, sealing, electrical insulation or conductivity as well as a reliable thermal management.

The new DuploCOLL TC tapes are free of silicones, halogens and solvents and provide immediate adhesion even to irregular surfaces, realising good surface wetting. Additionally, these thermal interface materials (TIMs) can compensate component tolerances, as well as seal against dust or moisture. In contrast to liquid TIMs, the assembly is clean and easy, no additional processing tools or special storage is needed and thanks to the customisable format of the tapes, there is freedom of design.

The new tapes also offer several advantages to silicone gap pads besides eliminating the danger of migrating silicone oil. The tapes are tacky at room temperature and therefore no additional fixation is needed during the assembly. As screws or clamps are not necessary, the adhesive tape solutions are a weight-saving alternative, combining fixation and function in one product.

With more than half of electronic malfunctions being caused by thermal overstress, a safe and reliable heat transfer within the EV battery is key. Connected to the cooling or heating element inside the EV battery, Lohmann’s TC tapes help to keep the temperature of the lithium-ion cells between 20°C – 35°C by enabling a homogenous heat transfer. Additionally, Lohmann states these tapes reliably protect against corrosion and abrasive dust, thus helping to maximise the lifetime of the cells.

The range fulfils the flame-retardant requirements according to UL 94 V-0. For short-term usage the portfolio provides heat resistance up to 180°C, while additionally enabling a high electrical insulation with a breakdown voltage of up to 26 kV/mm.

Lohmann’s thermally conductive range is available as rolls or customised high-precision die-cuts in various thicknesses. To support seamless integration into highly automated production processes, different colours are available for better detection by camera or optical sensor systems.

Becca England Assistant Editor t: +44 (0) 1727 615 413

Becca is the latest member to join our team and is eager to get stuck into the world of fasteners. She brings an enthusiastic and fresh outlook on what we do editorially and will be leading our social media activity – including sourcing material, editing articles and posting online.