Batteries require careful assembly to create a safe, convenient and powerful device. Most consumer batteries use crimped metal seals with a polymer sealant for their packaging. However, when the cell’s chemistry changes or more components must be attached, Lasers are the preferred tool.
As batteries are made at a very high rate, sometimes well over 10 per second, the use of resistance welders or mechanical fasteners is not viable. redENERGY Fiber Lasers can optically match the speed of the moving cell and spot weld without contact, electrode wear or electrode sticking.
For advanced cell chemistries such as Lithium cells, Lasers can create a hermetic seal to protect against water vapour damage. Laser welding a lid to the can is fast, reliable, low cost and easy to automate.
Typical Ni-Cd chemistry use nickel-plated mild steel components for low cost and good conductivity. Lithium cells often use stainless steel for some of their packaging. All have good metallurgy for Laser welding.
For hybrid automobile and high-tech space-based batteries, Fiber Lasers can be used to weld the many thin plates in the battery and weld or braze components together to optimise the energy per unit volume. Glass to metal feed-through pre-forms can also be Laser welded into the battery assembly to provide a hermetic package.
redENERGY Pulsed Fiber Lasers produce the necessary pulse energy and discreet pulses for spot welding cell components.
For seam welding cells for a hermetic seal then our redPOWER CW Fiber Lasers are often the best choice due to their high speed welding capability with low heat input.
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