TÜV Rheinland^®

First TÜV-S mark was issued to a product that was never certified for it before - a lithium-ion battery cell, intended for the large battery for the household use. The product is made by Eliiy Power, a leading lithium-ion battery maker in Japan and has undergone harsh testing under original test program developed by TÜV Rheinland’s battery experts. A combination of 11 tests, such as vibration, penetration, thermal abuse, overcharge and other tests compiled from several domestic and international standards was applied to assure safety of this new product to be widely promoted in the market.

Eliiy Power decided to apply this test sequence in order to demonstrate safety and reliability of their cells, especially in the light of increasing demand for the energy storage solutions in Japan and worldwide. “The reality is that although certain applicable standards for safety of lithium-ion batteries exist in various countries, the current status is far away from reaching international harmonization. Regulations vary from country to country, which is typical for rapidly developing and new technology such as high-energy batteries. However, being particularly conscious about safety and quality issues and facing increasing competition from other Asian manufacturers, Eliiy Power did not want to wait until standardization sets up. Instead, they proactively decided to rely on the 3rd party evaluation approach, and chose TÜV Rheinland as an expertise body to verify safety of their product. That is how Eliiy Power’s President, Mr.Hiroichi Yoshida, commented on the motivation to go on with this unique project”, - says Mr.Marcel Oliver Prickartz, Head of Battery Laboratory at TÜV Rheinland Japan.

As a result, an original test program based on existing safety standards was designed by TÜV Rheinland’s experts. Test conditions even more severe than defined by the standards were applied to the cell. After successfully passing the sequence, Eliiy Power now aims at making this achievement an industrial benchmark and expects other battery makers to follow an example. In turn, TÜV Rheinland Japan already observes increasing number of inquiries from other battery makers in regard with this testing program.

Ralf Diekmann
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