SHAPE FORMING


plastic fasteners or fasteners prone to corrosion so they can act as electrical conductors, being part of the electrical circuitry. Increase in electrical resistance causes generation of heat together with loss of energy. EV batteries can generate high


levels of heat, so it’s essential that it is distributed over the assembly to provide general cooling and avoid localised overheating. Busbars can support the distribution of heat from local hotspots to heat sinks, but only when correctly tightened to optimise heat transfer between the various elements. Using fasteners in thermally and electrically conductive coatings will aid an effective service life. In certain cases, electrical currents


must be contained. Barrier coatings avoid electricity from going where it shouldn’t and causing interference or a risk to safety through electrocution or fire. Specific coatings used include


PTFE (Polytetrafluoroethylene) because it is highly heat resistant with the ability to retain its properties across a temperature range, from -200°C to 260°C. It also has low, predictable friction, which can help to create secure joints through torque control, essential when assembling the battery module. Manufacturers and sub-contractors


must work together from the start to ensure the correct design for manufacturing (DfM) considerations. When cost-efficiency, sourcing, materials and product lifecycle


EV battery with fasteners


This is a busbar with an assembly pressing


concerns are discussed early on at the design table, costly delays later on can be avoided. As an emerging transport sector,


the fasteners needed in EV charging units and their associated structures require manufacturers and their supply chain to have technical knowledge and experience. There are


increasing pressures and opportunities involved working within intricate global supply chain networks, and manufacturers servicing the automotive, electronics and technology sectors will be best placed to work with emerging EV-related businesses.


LOOKING AHEAD The EV sector is a fascinating one to watch as it develops and gains momentum. As the requirement for robust EV charging points grows, the automotive industry continues to innovate, with fasteners playing a major role in the EV revolution. It is a rapidly accelerating


These have electrical isolation coatings


market with huge potential for manufacturers and suppliers. It is therefore essential the supply chain has the infrastructure, technology and solutions in place to meet future demand for electric car use. ●


Sven Brehler is engineering project manager at TR Fastenings. See www.trfastenings.com


Different types of compression limiters 34 www.engineerlive.com


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