Second Life batteries in stationary storage systems – Smart Power GmbH receives design certification from TÜV Nord

The use of second-life batteries from vehicles in stationary storage systems is often discussed and propagated. It offers a good opportunity to significantly extend the life cycle of raw materials, cells and batteries and thus optimize both the environmental compatibility and the economic efficiency of battery use. However, the project planning and design of such systems is generally much more complex and planning intensive than the design of systems based on new batteries. Many boundary conditions have to be taken into account even in the mechanical housing of the battery modules. Relevant factors here are, for example, the dimensions and weight of the modules, suitable mechanical accommodation, taking into account the permissible creepage distances and clearances, and corresponding accessibility of the connections. Since the battery modules are always live when installed in the new systems, careful logistical planning of installation and commissioning is necessary. Furthermore, as a rule, all electrical interfaces such as the battery management system for monitoring the individual cells and modules, but also the voltage adaptation to available inverter systems must be newly developed. Project planners therefore have to solve numerous individual planning tasks with such systems, whereas normally prefabricated battery racks enable very simple and standardised planning with new systems.


Smart Power GmbH is currently building several larger storage projects based on second-use battery modules. In order to enable a fast and efficient construction of these storage systems similar to new systems, the design of the battery racks has been standardized similar to new systems in the form of a scalable modular system. In order to meet the best possible quality criteria, it was decided to subject this modular system to a type approval according to DIN 61439-1 using the example of a first sample project and to have this certified by TÜV Nord Ensys GmbH & Co. KG externally. All relevant test criteria were prepared on the basis of the relevant individual certificates and checked for plausibility by TÜV. Just in time for the commissioning of the first two larger projects with 1.4 MW each, the project manager at Smart Power, Nina Hanselmann, was able to receive the positive design certificate.

The Smart Power GmbH team is delighted with this confirmation and will commission the first two systems of this type in the coming weeks. Further projects can be offered and realized at short notice at any time due to the extensive standardization and in particular due to existing supply contracts with a large automobile manufacturer. Smart Power primarily sees systems above 1 MW/1MWh in the industrial environment as well as in energy suppliers and grid operators as a predestined area of application.


Smart Power at Intersolar / ees – Hall C2, Booth 460A

We will be happy to answer your questions and provide information on the technology, application and cost-effectiveness of storage facilities for trade, industry, energy suppliers and network operators at Stand C2.460A.


About Smart Power

Smart Power GmbH specialises in the planning and implementation of large-scale storage systems for trade, industry and network operators, as well as efficiency-enhancing energy management systems and energy consulting for energy-intensive companies. It also cooperates with research institutes, regularly carries out product tests of the components used and thus guarantees the sustained high quality of past and future projects. The aim of Smart Power GmbH’s work is the efficient use of electricity and the further development of sustainable renewable energies using state-of-the-art control and battery storage technology.


Feldkirchen, 04 March 2019

Dipl.-Ing. Hans Urban

business development

Smart Power GmbH & Co. KG

Dornacher Street 3

85622 Feldkirchen near Munich

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