Wevo has developed a liquid adhesive system specially designed for electric vehicle (EV) batteries. Also equipped with optimised heat dissipation qualities, these customisable polyurethanes also allow for new possibilities in the design process.
High temperatures are generated in the battery cells of electric vehicles (EVs) during the charging process and these have to be dissipated. Until now, this has mostly been achieved by inserting silicone-based pads between the cells and the cooling system, although this doesn’t always achieve the desired effect. Wevo has therefore designed a liquid adhesive system that offers better surface wetting and can also be used as structural adhesives. This adhesive reliably dissipates the heat generated from the battery cells to the heat sink.
Ongoing upgrades to system voltage is leading to an increase in the efficiency of the battery charging process. However, this leads to high temperatures in the battery cells. Inlaid solutions that are inserted between the cells and the cooling system do not fully compensate the uneven surfaces of the cells and cooling system. This can lead to hotspots and damage to the cells.
Wevo’s new adhesive system can be applied as a vertical bead that doesn’t collapse, even if the components are tilted or rotated as part of the manufacturing process. At the same time, the corresponding special fillers ensure that the viscosity of the potting compound doesn’t rise disproportionately to the thermal conductivity. Such a process allows for trouble-free processing in standard dosing systems despite the compound’s high thermal conductivity. Additionally, these Wevo products can be used as structural adhesives for durable and dimensionally stable bonding applications. This makes it easier for battery manufacturers to overcome challenges generated in the design process.
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