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K-Flow battery cover to tray joining illustration

Flow drill fastening for electric vehicles

Learn more about our flow drill fastening applications for battery assembly

Contact our experts

Challenges in battery assembly:


  • Joint strength and leak tightness
  • Removable cover for service requirements
  • Repeatable fastening/tightening
  • Electrical contacting
  • One-sided access
  • Large series production

Our solution for cover-to-tray joining:

Flow drill fastening meets high standards for joint strength and crash performance. With our K-Flow technology, the battery cover can be mounted to the tray with single-sided access. The joint is leak tight between fastener and sheet as well as between both sheets and it can be combined with a liquid gasket. At the same time, it is detachable to facilitate maintenance and dismantling. The metallic components are in a conductive bond and form a Faraday cage, which prevents electromagnetic interference. With short cycle times and high process reliability, it is suited for large series production.

Learn more about battery joining:

Solutions for electromobility

Battery joining for electric vehicles

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