Controlled tightening for module mounting

Once assembled, battery modules need to be mounted on top of a liquid gap filler paste in the battery tray. Although this can be achieved with tightening, the soft joint behaviour of the gap filler presents a challenge in production, due to the tendency of gap filler adhesive to squeeze out between the module and tray. This can result in air remaining trapped within the battery module, which compromises thermal transfer.

March 21, 2024

To guarantee even distribution and full contact between the battery modules and the gap filler, a fully controllable tightening strategy is required. Atlas Copco’s industry-leading nutrunners provide a multi-spindle solution, which delivers a simultaneous tightening process. This process is electronically controlled by Atlas Copco’s space saving Power Focus 6000 Flex System platform, in order to ensure a consistent tightening process, quality assurance and traceability via data collection and visualisation. By working synchronously in the final tightening process, the assembly cycle time is reduced and each module is fixed evenly in the tray. Optimum contact is achieved by employing a programmed tightening strategy with a precise tightening sequence, that accounts for the behaviour of the liquid conducting paste.

PF6 Flex fixing module to tray

As a world-leading provider of innovative joining technologies for the automotive industry, Atlas Copco’s tightening strategies for module mounting enables precise application of the battery modules to the tray that eliminates air pockets, whilst maintaining short cycle times and process reliability.

Operators working on live terminals with handheld power tools in EV battery assembly, where exposure to voltages over 120V DC, electric arcs or exploding batteries can cause injury or death, must also be fully protected. Atlas Copco enables manufacturers to mitigate risk through a range of handheld electric assembly tools that feature insulated tool covers, as well as fully isolated sockets and quick change adapters.

Find out about our innovative range of Insulated Sockets, protecting the operator and your process

With innovative joining technologies and a wealth of expertise in battery assembly, Atlas Copco is your strategic partner for electromobility.