Green Car Congress  
Go to GCC Discussions forum About GCC Contact  RSS Subscribe Twitter headlines

« Obama Administration releases implementation plan for the National Strategy for the Arctic Region | Main | Samsung SDI to use Celgard separator in electric drive vehicle and storage system Li-ion batteries »

Print this post

Celgard files patent infringement lawsuit against LG Chem over Li-ion separator technology

31 January 2014

Celgard, LLC, a subsidiary of Polypore International, Inc., filed a complaint in the US District Court of the Western District of North Carolina against LG Chem, Ltd. and LG Chem America, Inc.. The complaint alleges that LG has infringed Celgard’s United States Patent Nº 6,432,586 issued for an invention entitled “Separator for a High Energy Rechargeable Lithium Battery.”

The patent in the lawsuit covers ceramic composite layer lithium-ion battery separators developed by Celgard for high-energy rechargeable lithium-ion batteries. This lawsuit has been filed following a lengthy period of unsuccessful discussions with LG regarding various business terms of its relationship with Celgard, including infringement of Celgard’s patent. Celgard is represented by the law firm Kilpatrick Townsend & Stockton, LLP.

Celgard battery separators are polypropylene (PP), polyethylene (PE), or trilayer PP/PE/PP electrolytic separator membranes.

Earlier in January, LG announced that it obtained a patent for its safety-reinforced separator (SRS) in Europe and Japan. LG Chem now has SRS patents in five regions, including South Korea, the United States and China. SRS uses nanoscale ceramic particles to prevent internal short circuits. LG Chem is also embroiled in litigation with another S. Korean company, SK Innovation, over the separator technology. (Earlier post.)

Separately, Polypore announced that Celgard and Samsung SDI Co., Ltd. have entered into a long-term supply agreement under which Samsung will purchase Celgard brand separator to be used in its electric drive vehicle and energy storage system lithium-ion batteries. (Earlier post.)

Celgard has a long history of innovation in lithium-ion battery separators and is a proven world leader in this technology. We value long-term customer relationships, and we are interested in partnerships that reflect the value of our products in applications such as electric drive vehicles (EDVs), where exceptional safety and performance characteristics are critical.

We supported LG for years under a formalized memorandum of understanding that was intended to result in a long-term supply agreement, investing substantial capital at their request and developing and qualifying high quality products with unique attributes. Unfortunately, after a long period of support and discussions, LG's recent approach and demands were simply unacceptable.

Legal action is not a decision we take lightly. However, LG’s recent approach in both consumer electronics and EDV applications leaves us with no choice. While LG has not confirmed this in writing to us as we requested, representatives of LG have verbally stated that they are attempting to qualify alternate sources of supply to Celgard separator—an action we believe constitutes further infringement of our coating patents. We are taking this action on behalf of our company and our shareholders to safeguard our assets, and we will continue to take appropriate steps to protect our intellectual property.

—Robert B. Toth, President and CEO of Polypore

During the fourth quarter of 2013, Polypore recorded no revenues from LG and expects to report fourth quarter sales for the Electronics and EDVs segment to be in the low- to mid-$30 million range.

January 31, 2014 in Brief | Permalink | Comments (1) | TrackBack (0)

TrackBack

TrackBack URL for this entry:
http://www.typepad.com/services/trackback/6a00d8341c4fbe53ef01a73d6b4838970d

Listed below are links to weblogs that reference Celgard files patent infringement lawsuit against LG Chem over Li-ion separator technology:

Comments

So many people are trying to get $$$M from Samsung with doubtful claims. This may be another one of them.

Unfortunately, all those legal claims can slow the arrival of improved batteries and benefit Oilcos and ICEVs manufacturers.

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

Green Car Congress © 2014 BioAge Group, LLC. All Rights Reserved. | Home | BioAge Group