Solus Advanced Materials Wins European Battery Foil Lawsuit
The Mannheim Local Division of the Unified Patent Court, or UPC, on Oct. 23 local time dismissed claims brought by SK Nexilis against Solus Advanced Materials in a patent infringement lawsuit over battery foil. The court found that Solus Advanced Materials’ product did not infringe SK Nexilis’ paten
The Mannheim Local Division of the Unified Patent Court dismissed a patent infringement lawsuit brought by SK Nexilis against Solus Advanced Materials, finding that Solus' product did not infringe SK Nexilis' patent. The lawsuit, which began in 2025, centered on the interpretation of the Rpc(Peak Count Roughness) value, a measure of surface roughness for copper foil used in secondary batteries.
The relevant patent claim specified that the number of valid peaks within a 4mm sampling length must be between 10 and 100. Solus' Rpc value was found to be below 10, meaning it did not infringe the patent claim. The court ordered SK Nexilis to pay Solus €1.1 million in litigation costs.
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