Laser Welding for the Connection of Battery Cells

Laser Welding for the Connection of Battery Cells

Single battery cells are connected in series or parallel within a battery module. This is realized by the electrical connection of the contact tabs/arrestors. During the welding process for contacting, the heat input must be kept at a minimum, making the laser the ideal tool. Because high reflecting materials such as copper or aluminum have to be joined, the fiber laser in combination with a wobble solution is the right choice for this application. Usually for this application output powers of up to 2 kW are used.  Together with further peripheral components, several battery modules are assembled to one battery pack for use e.g. in electric cars.

Prismatic battery module semi-automatic assembly line

Dynamic Beam Welding

Within the shortest possible time multi spot welds of any geometry can be generated with Dynamic Beam Welding Systems in a very large work space. This system technology is applied amongst others in the production of automobile seats and mountings.

Spot Welding of Copper Conductors for Electric Motors

For this application a high number of welds per part have to be realized. With scanner and fiber laser, the laser beam can be positioned from weld to weld within milliseconds. Adjusted scanner movements melt the copper so that broad welding gaps can be bridged. Due to their high absorption into highly reflective materials such as copper, the fiber laser is the right tool for this application. Another advantage of laser welding with the fiber laser is the low heat input due to very short process times. Therefore damaging the isolations because of high temperatures can be avoided.

Laser Welding of Gears and Powertrain Components

Using lasers, gear components made from high-strength steels can be welded without cracking. The welding of gear components using laser could be established already a long time ago due to its advantages such as low maintenance costs, low distortions at the work piece, high flexibility and simple automation.

Laser Welding of Tailored Blanks

Tailored blanks consist of laser joined flat sheets of different material thicknesses and alloys. Linear as well as non-linear joints are generated. Due to the strength and ductility of the laser-welded seams, the tailored blanks can be subsequently stamped into components such as car doors.

As part of the preparation of high strength tailored blanks out of manganese-boron steel prior to laser-welding, q-switched solid-state lasers can be used for decoating the aluminum-silica layer.

Laser Welding of Exhaust System Components

Stainless steel heat exchanger tubes are welded with laser scanner solutions in combination with our high power fiber lasers. Stainless steel exhaust couplings and sleeves can be either welded with fiber or CO2lasers.

Laser Welding of Air Conditioning Cooling Pipes

For welding the aluminum of this air conditioning part, our fiber lasers are the ideal choice. The shorter 1um wavelength is much better absorbed by high reflective materials such as copper, aluminum or brass, compared to longer wavelengths.

Laser Welding of Brake Sensors

The steel of ABS brake sensors is welded with high-power fiber lasers. Besides the brake sensors also various other sensors like pressure sensors, force sensors and air-bag sensors are welded by laser.