Lower costs, more efficiency:
Russian module manufacturer and PV project developer Hevel LLC switches to adhesive technology from teamtechnik for its HJT modules
Stringer TT1600 ECA from teamtechnik connects HJT cells reliably using adhesive technology in series production
The Russian module manufacturer and PV project developer Hevel LLC, based in Moscow, specializes in solar modules manufacturing with heterojunction (HJT) cells. In order to expand production of its high-efficiency modules, Hevel ordered new stringer systems, including layup, from German specialist teamtechnik. This change to teamtechnik is the result of a successful series of tests carried out beforehand. These showed that teamtechnik’s adhesive technology would reduce costs and improve the reliability of the modules.
Hevel manufactures its modules in Novocheboksarsk in the southern Volga region and was formerly active in thin-film technology. The cell and module manufacturer achieved the changeover to the sensitive HJT cells, with thicknesses less than 150µm, in record time.
Hevel’s specialists from its own R&D center developed their HJT technology using existing knowledge from thin-film solar module production. Next, the company placed orders for two Stringer TT1600 ECA units with the German production system specialist Teamtechnik in order to increase production from 160 MW to 250 MW.
These systems use innovative adhesive technology to connect HJT cells reliably in series production at low process temperatures. Verified modules that were produced in preliminary tests on teamtechnik stringers and then tested in a climate-control chamber demonstrated higher efficiency and stabler electrical parameters.
The layup system, also ordered from teamtechnik, is matched precisely to the high cyclic output of the two stringers and provides additional process reliability. Elena Bodnarchuk, Deputy CEO of Hevel LLC, says: “The deal with teamtechnik is a logic step in implementing our strategy to develop a new branch of PV technology. Additionally, this system makes us more flexible in regard to module design, material selection and material combinations. This will enable us to make our own developments in future, with a high potential for further reducing costs while also increasing quality and efficiency.”
Stringer TT1600 ECA: innovative adhesive technology for HJT cells
Here, ECA is an abbreviation for “electrically conductive adhesive”. In this process, developed by teamtechnik, a conductive adhesive material is applied to both sides of the cell by means of a screen-printing technique. Next, light-capturing ribbons (LCR) are positioned precisely over the solar cells to connect them and form a string, and are cured completely on the string transport at temperatures of about 160 ºC. Michael Essich, of the sales department for solar at teamtechnik, is pleased with the new partnership with Hevel LLC: “Hevel has a good technical knowledge of HJT cells. Our cooperation is constructive and successful at all levels.”
A brief portrait: teamtechnik Group is one of the international market leaders for production technology, assembly and functional test systems. The company, based in Freiberg am Neckar, Germany, focuses on developing and building custom automation solutions for the automotive, medical and solar technology sectors, in which it is recognized as a technology leader with a high level of process expertise. A proven area of expertise is assembly and test lines for electric drive systems and e-mobility components. teamtechnik was founded in 1976 and today has production sites in Germany, Poland, China and the USA. With over 1000 employees worldwide, the systems manufacturer achieves a turnover of € 170 million.