At the productronica trade fair in Munich this November, the Fraunhofer Institute for Laser Technology ILT will be presenting Laser-Based Tape-Automated Bonding, LaserTAB for short. The experts from Aachen will be demonstrating how new battery cells and power electronics can be micro-welded more efficiently and precisely than ever before thanks to new optics and robot support.
Fraunhofer ILT from Aachen relies on a clever combination of robotics and a laser scanner with new optics as well as process monitoring, which it has developed itself. In focus is a new light-weight robot (LBR is German for lightweight robot) developed by Kuka Roboter GmbH from Augsburg. According to company statements, not only is the LBR iiwa, or “intelligent industrial work assistant (iiwa)”, the first sensitive robot to be manufactured in series, but it also helps man and robot work closely together.
The lightweight construction robot “intelligent industrial work assistant” guarantees that man and machine cooperate smoothly.
© KUKA AG, Augsburg, Germany.
Spacer provides optical distance
The Aachen researchers have mounted a relay-optic and a spacer on the collaborating robot (Cobot), the latter of which ensures that the optics complies with the distance (focal length) required for the process. The LBR iiwa “feels” when the spacer touches the weld and starts the welding process. Thus, the welding points are always held at a constant distance from the lens thanks to the spacer and the sensing robot.
In Munich, Fraunhofer ILT will be using concrete applications to demonstrate how the microjoining process in battery technology can be made more precise and reliable with the help of this lightweight robot. In detail, it is addressing how to better weld prismatic, round and pouch cells.
In a demonstration, the institute combines the two processes of microjoining and 3D printing, in which this welding process plays a leading technical role. The Aachen-based scientists will be presenting a technology demonstrator on how a copper contact element can be connected to a round cell via LaserTAB.
The Fraunhofer ILT has also developed a specially shaped copper connector, which it manufactures on its own with Selective Laser Melting (SLM), also known as Laser Beam Melting or Laser Powder-Bed Fusion (L-PBF).
No more complicated positioning necessary
All possible applications point to the advantages of the new robot-assisted process, in which the user guides the robot directly to the point of use. It saves the previous, elaborate search of the focus position and the cumbersome positioning of the laser. In addition, the spacer ensures that the focus position does not change during joining and that the connector is pressed against the workpiece or the battery.
Elaborate clamping devices are, therefore, superfluous or can be less complex. In particular, users will appreciate how the system mechanically maintains the distance of the optics to the welding site, especially when they have to balance production tolerances or different heights. In these challenging situations with their mostly very complex geometries, the robot-assisted LaserTAB works much more precisely than conventional methods.
Fraunhofer ILT at the productronica
More information on LaserTAB will be available at the joint Fraunhofer stand B2.317 at productronica, the world's leading trade fair for electronics development and production, from November 14 to 17, 2017 in Munich.
Johanna Helm M. Sc.
Micro Joining Group
Telephone +49 241 8906-8382
Dr.-Ing. Alexander Olowinsky
Group Manager Micro Joining
Telefon +49 241 8906-491
Petra Nolis M.A. | Fraunhofer-Institut für Lasertechnik ILT
SYSTEMS INTEGRATION 2018 in Switzerland focuses on building blocks for industrial digitalization
20.11.2017 | IVAM Fachverband für Mikrotechnik
Medica 2017: New software enables early diagnosis of arteriosclerosis
06.11.2017 | Technische Universität Kaiserslautern
An interdisciplinary group of researchers interfaced individual bacteria with a computer to build a hybrid bio-digital circuit - Study published in Nature Communications
Scientists at the Institute of Science and Technology Austria (IST Austria) have managed to control the behavior of individual bacteria by connecting them to a...
Physicists in the Laboratory for Attosecond Physics (run jointly by LMU Munich and the Max Planck Institute for Quantum Optics) have developed an attosecond electron microscope that allows them to visualize the dispersion of light in time and space, and observe the motions of electrons in atoms.
The most basic of all physical interactions in nature is that between light and matter. This interaction takes place in attosecond times (i.e. billionths of a...
Transistors based on carbon nanostructures: what sounds like a futuristic dream could be reality in just a few years' time. An international research team working with Empa has now succeeded in producing nanotransistors from graphene ribbons that are only a few atoms wide, as reported in the current issue of the trade journal "Nature Communications."
Graphene ribbons that are only a few atoms wide, so-called graphene nanoribbons, have special electrical properties that make them promising candidates for the...
In a recent study, published in Nature, ICFO researchers Nicolas Maring, Pau Farrera, Dr. Kutlu Kutluer, Dr. Margherita Mazzera, and Dr. Georg Heinze led by ICREA Prof. Hugues de Riedmatten, have achieved an elementary "hybrid" quantum network link and demonstrated for the first time photonic quantum communication between two very distinct quantum nodes placed in different laboratories, using a single photon as information carrier.
Today, quantum information networks are ramping up to become a disruptive technology that will provide radically new capabilities for information processing...
High-precision measurement of the g-factor eleven times more precise than before / Results indicate a strong similarity between protons and antiprotons
The magnetic moment of an individual proton is inconceivably small, but can still be quantified. The basis for undertaking this measurement was laid over ten...
05.12.2017 | Event News
15.11.2017 | Event News
15.11.2017 | Event News
05.12.2017 | Information Technology
05.12.2017 | Life Sciences
05.12.2017 | Materials Sciences