Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

LaserTAB: More efficient and precise contacts thanks to human-robot collaboration

25.09.2017

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.


Battery modules from 18650-battery cells contacted by laser-beam microwelding. This module was developed in collaboration with the Fraunhofer LBF LBF in Darmstadt as part of the project evTrailer.

© Fraunhofer ILT, Aachen, 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.

Contact

Johanna Helm M. Sc.
Micro Joining Group
Telephone +49 241 8906-8382
johanna.helm@ilt.fraunhofer.de

Dr.-Ing. Alexander Olowinsky
Group Manager Micro Joining
Telefon +49 241 8906-491
alexander.olowinsky@ilt.fraunhofer.de

Weitere Informationen:

http://www.ilt.fraunhofer.de/en

Petra Nolis M.A. | Fraunhofer-Institut für Lasertechnik ILT

All articles from Trade Fair News >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Data use draining your battery? Tiny device to speed up memory while also saving power

The more objects we make "smart," from watches to entire buildings, the greater the need for these devices to store and retrieve massive amounts of data quickly without consuming too much power.

Millions of new memory cells could be part of a computer chip and provide that speed and energy savings, thanks to the discovery of a previously unobserved...

Im Focus: An energy-efficient way to stay warm: Sew high-tech heating patches to your clothes

Personal patches could reduce energy waste in buildings, Rutgers-led study says

What if, instead of turning up the thermostat, you could warm up with high-tech, flexible patches sewn into your clothes - while significantly reducing your...

Im Focus: Lethal combination: Drug cocktail turns off the juice to cancer cells

A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.

The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...

Im Focus: New Foldable Drone Flies through Narrow Holes in Rescue Missions

A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.

Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...

Im Focus: Topological material switched off and on for the first time

Key advance for future topological transistors

Over the last decade, there has been much excitement about the discovery, recognised by the Nobel Prize in Physics only two years ago, that there are two types...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

ICTM Conference 2019: Digitization emerges as an engineering trend for turbomachinery construction

12.12.2018 | Event News

New Plastics Economy Investor Forum - Meeting Point for Innovations

10.12.2018 | Event News

EGU 2019 meeting: Media registration now open

06.12.2018 | Event News

 
Latest News

Data use draining your battery? Tiny device to speed up memory while also saving power

14.12.2018 | Power and Electrical Engineering

Tangled magnetic fields power cosmic particle accelerators

14.12.2018 | Physics and Astronomy

In search of missing worlds, Hubble finds a fast evaporating exoplanet

14.12.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>