Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Industrial Laser Technology at Battery Japan 2016

23.02.2016

There are plenty of opportunities for new battery technology in the automotive industry, storage power plants, or public transportation networks - everywhere there is a strong need for new rechargeable batteries. Accordingly, the need for reliable industrial production technology is growing. The Fraunhofer Institute for Laser Technology ILT in Aachen develops new processes to make the manufacturing of battery packs faster and more efficient.

It was 1991, in Japan, when the world’s first rechargeable lithium battery entered the market. Today, Japan is regarded as the most advanced market in the world for e-mobility. Efficient energy storage is a key issue in that field; and this is also a focus of the Battery Japan exhibition, which takes place from March 2nd to 4th in Tokyo.


Picture 1: Fraunhofer ILT has developed laser beam welding with local power modulation for volume production of battery packs.

© Fraunhofer ILT, Aachen


Picture 2: Battery cells (type 18650) contacted with a laser bonder.

© Fraunhofer ILT, Aachen.

Battery Japan is part of the World Smart Energy Week in Tokyo, the largest event of its kind, with nine exhibitions and 227 conference sessions. This comprehensive business event is expected to bring together 80,000 professionals and 21,000 conference attendees from across both Japan and the world.

The Fraunhofer ILT will also be there with several exhibits at stand W23-26-d, together with the Fraunhofer Battery Alliance.

Laser welding of battery packs is ready for volume production

No matter whether you are talking about cars, airplanes, or laptops: under all conditions, rechargeable batteries must remain sealed. This also holds for larger battery packs from industrial volume production. In recent years, experts from the Fraunhofer ILT have developed welding processes to solve this exact problem, even for thin materials.

Together with other Fraunhofer institutes, they have worked on a battery pack with 4,800 cells (type 18650). A special technology demonstrator, on display at Battery Japan, shows a battery pack where plus and minus poles are contacted from the same side of the cell. Welding with a fast oscillating laser beam allows for a very precise energy deposition in the material. In fact the welding of the 300 micron thick cell casing in the demonstrator is done with such a fine spot that the underlying heat sensitive plastic parts are not harmed.

Ribbon bonding with the Laser

In a similar procedure, modern lasers with excellent beam quality can also bond copper or aluminum ribbons onto battery contacts. Compared to conventional bonding technologies, the corresponding requirements for surface finish qualities and cleaning processes are less demanding. In addition, the process is highly independent of the substructure and vibrational behavior of the workpiece.

Of course, the procedure can also be automated. System providers can develop their own solutions for stationary or mobile applications. For example, the Fraunhofer ILT joined F & K Delvotec Bondtechnik GmbH from Bavaria to engineer a combined system, where a laser bonding head is integrated into a conventional bonding machine. This system can process thicker ribbons with the laser as well as thin ribbons with conventional ultrasonic bonding.

The applications of the laser-bonding process are numerous; a primary application could be the bonding of ribbons onto DCB-substrates and copper terminals onto the housing of power electronics modules. The technology will be further improved for thicker ribbons, where conventional bonding currently approaches its physical limits.

Event

Battery Japan, March 2 – 4, 2016, Tokyo, stand W23-26-d.

Contact

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

Dipl.-Ing. Paul Heinen
Group Micro Joining
Telephone +49 241 8906-145
paul.heinen@ilt.fraunhofer.de

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

Weitere Informationen:

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

Petra Nolis | 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: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

What the world's tiniest 'monster truck' reveals

23.08.2017 | Life Sciences

Treating arthritis with algae

23.08.2017 | Life Sciences

Witnessing turbulent motion in the atmosphere of a distant star

23.08.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>