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Photovoltaic home storage to be safe

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At the Intersolar in Munich KIT researchers present extensive results on the safety and life of battery-Home Save for private photovoltaic systems

How efficient, reliable and safe lithium-ion batteries can be as energy storage, they have long been proven in use in commercial electric vehicles. These high safety standards and norms, it is important also to the new market of battery storage for private photovoltaic systems to transfer. On the leading trade fair Intersolar in Munich will be the stand of the KIT (B1.239 ees) presented exemplary solutions from June 4 as safe and durable PV home storage can be built.

“Lithium-ion batteries can be built extremely reliable if the manufacturer has the necessary know-how and some” golden rules “to comply,” explains Dr. Olaf Wollersheim from Project Competence E at the Karlsruhe Institute of Technology (KIT). He and his team have transport and operational safety of stationary battery storage studied and developed a guide. “The guide is intended to serve as a rough checklist with which even non-experts can separate the wheat from the chaff.” Stationary batteries store the electricity from the sun, so eliminate the production peak at noon and then can use it as needed about the evening, at night or in the morning exits. The area-wide balancing of generation and demand would be an important building block for the energy turnaround.

Unfortunately apply to the young market of battery-home storage not all manufacturers the “Golden Rules” for battery safety on. These include the certificates UN38.3 on battery and at the cellular level, the draft of DIN EN 62619 and functional safety test according to ISO Safety Integration Level (SIL). “The industry has an obligation to write the great security for your customers and to promote compliance with the standards offensively.” That there are black sheep in the industry, demonstrate the use of reports from fire departments that perform defective battery storage as a cause of fire. Also, current, its own tests of Competence E project at commercial stationary battery storage have shown that the systems partly do not meet safety standards.

This stationary storage can be with relatively simple measures also very safe constructed and operated. “The automotive industry, which develops and produces high-care lithium-ion batteries, is showing how it goes. The standards used there must be transferred to home storage, so that the black sheep disappear, “explains Dr. Andreas crediting, who coordinates the project Competence E. For example, by an all-pole disconnection of the battery, so the separation of the two battery poles from the mains in the event of imminent surge overloading can be reliably prevented when the switches are triggered by independently operating safety systems. “The necessary know-how needs to build any business that wants to make home storage. Citizens who want to support with their home storage the energy transition, have a right to that memory is as safe as possible. “By this needs to be worked specifically now.

During the Intersolar in Munich, 4th-6th June 2014, the experts of KIT are on stand B1.239 ees available for discussions. Besides wearing at 13:10 clock Olaf Wollersheim when electrical energy storage (ees) Forum (Hall B1, Booth B1.150). The lecture title is “Safety first – More safety for lithium-ion batteries”

For more information on Checklist: http://www.kit.edu/downloads/KIT_Li-Ionen_Checkliste.pdf

For more information about the tests at Project Competence E:http://www.kit.edu/kit/15184.php

The Competence E project brings together all aspects of research from the battery material to the stationary energy system in a unique way across Germany. With an open technology platform for battery electric vehicle propulsion and stationary energy storage systems, the systemic approach aimed at industrially applicable solutions and their production processes. Thanks to the integration along the value chain, the aim is to produce up to 2018 battery systems, which have an energy density of 250 watt-hours per kilogram at a cost of 250 euros per kilowatt hour. This is an important step in the direction of energy policy and climate change objectives will be implemented: increased storage capacity for stationary storage to compensate for the fluctuation of renewable energies as well as an extension of the range of electric vehicles to increase acceptance.

More about the project Competence E under: http://www.competence-e.kit.edu/

The Karlsruhe Institute of Technology (KIT) is a public corporation under the laws of the State of Baden-Wuerttemberg. It fulfills the mission of a university and the mission of a national research center of the Helmholtz Association. The main topics of research are energy, natural and built environment, society and technology, from fundamental questions to application. With approximately 9,000 employees, including nearly 6,000 in scholarship and teaching, as well as 24 000 students, KIT is one of the largest research and teaching institutions in Europe. KIT pursues its tasks in the knowledge triangle of research – teaching – innovation.

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