ElringKlinger AG
Menü

Highly efficient solutions for tomorrow's mobility needs.

Industry experts are unanimous in their verdict that alongside battery technology the polymer electrolyte membrane fuel cell (PEMFC) marks a breakthrough in e-mobility. Provided that pure hydrogen is available, PEM fuel cell technology can be deployed effectively in all those areas of application in which low consumption and zero emission levels are an essential requirement. Boasting a range of company-developed fuel cell products, ElringKlinger offers innovative solutions tailored specifically to the challenges associated with stricter emission standards for conventional combustion engines and limited driving range in battery-powered vehicles.

Drawing on many years of experience as a supplier to the automotive industry, underpinned by fully automated processes in the areas of metalworking, plastic injection molding and joining/coating technology as well as automated assembly processes and in-house tool and mold making capabilities, ElringKlinger has established itself as a preferred partner for the cost-effective manufacture of fuel cell products in large quantities. At present, we are focusing on applications that are not dependent on the widespread supply of hydrogen. The emphasis here is on parts commonality and the integration of specific functions to deliver a thoroughly streamlined total cost of ownership. When it comes to production, we rely on tried and true processes, readily available technical solutions and partners/suppliers with a proven background in the industrial sector. We are able to supply automotive OEMs with an extensive range of components as well as premium-quality PEM fuel cell stacks – on request even with fully integrated system functionality. By providing innovative end-to-end solutions that encompass everything from in-house development through to manufacture, we aim to assist our customers in their pursuit of business excellence.  


PEMFC stack modules

PEMFC stack modules

A fuel cell stack is usually a stack of cells consisting of bipolar plates, membrane electrode assemblies (MEAs), seals and end plates, and the tensioning system.

Stack modules from ElringKlinger also include other system functionalities that make integration into customer systems vastly easier and significantly reduce the potential for leakages in the system. These are integrated into a special media module made of plastic and typically contain sensors for pressure and temperature, valves, condensate separators for the anode circuit and optional customer-specific functionalities.

ElringKlinger currently offers three standardized stack platforms: NM5, NM9, and NM12. We additionally develop customer-specific stack solutions that are optimally tailored to the respective system environment.

PEMFC modules

PEM fuel cell modules
PEM fuel cell modules

PEMFC modules

As well as stacks from the NM5 platform, an ElringKlinger fuel cell module includes the peripherals necessary for integrating it into a complete system. These include the control system, hydrogen pressure regulation, air filter, primary cooling circuit, and power electronics. Interfaces to the customer system encompass the supply and exhaust air lines, the medium-pressure hydrogen supply, and the removal of purge hydrogen and product water.

PEMFC modules are currently available in two output classes. Naturally, customer-specific system developments or adaptations are also possible. Application areas include buses and trucks, but also trains, ships, and aircraft.

Metal bipolar plates

Metal bipolar plates
Metal bipolar plates

Metal bipolar plates

Metal bipolar plates offer tangible advantages with regard to costs and – an aspect that is particularly important for mobile applications – power density as well as the cold-start capability of fuel cells. Using high-precision, progressive tooling suited to volume production, ElringKlinger is already producing bipolar plates in a fully automated, interlinked manufacturing process.

PEMFC stacks consist of alternating stacks of membrane electrode assemblies (MEAs) and bipolar plates. They are interspersed with porous layers that serve to distribute the gas and transfer the electric current. The bipolar plate separates the media and distributes them within the stack. It also ensures uniform cooling of the stack and transfers the electric current to the adjacent cells.

End and media modules

End and media modules for PEMFC stacks
End and media modules for PEMFC stacks

End and media modules

Fuel cell stacks have to be permanently tensioned with a uniform contact pressure over the entire surface of the cell. This is achieved by means of end modules consisting of the tensioning system and possibly media modules.

Production-ready end modules for PEMFCs are hybrid assemblies consisting of metal components and high-performance plastics that meet the full range of requirements while offering excellent dimensional stability. Like the media modules, they have to be mechanically stable, chemically resistant, and as light as possible. Using injection molding processes, ElringKlinger produces highly complex end modules that meet the most stringent tolerance specifications. A special feature of these modules is the integration of parts of the system technology directly on the stack in the form of a media module, thereby extensively simplifying the system.

Sealing systems

Sealing systems

Thanks to our comprehensive expertise in sealing technology and stack platform production, we are also able to offer bespoke sealing systems for fuel cells. These seals can be fitted both on the soft goods (GDL, sub-gasket) and on the bipolar plates. To do this, we employ our own materials or materials specified by the respective customer as well as cutting-edge production processes. For high-performance, reliable, and low-cost sealing solutions.


Committed to excellence, we continuously refine and optimize stacks featuring metallic bipolar plates for applications with long service lives in cyclical operation. Both the stack and its components have consistently withstood extreme conditions as part of endurance testing. Thanks to the strategy of parts commonality together with the integration of system functions and the consistent approach of developing application-specific solutions, ElringKlinger products combine top-level performance with cost-effective design. Drawing on our experience as a high-caliber development partner, we look forward to tackling any customer-specific challenge.

Our PEMFC stacks are trialled and approved at our own test facilities, which are capable of simulating system conditions. Our PEM fuel cell stacks are used in mobile applications within the industrial sector, e.g. small utility vehicles and material-handling equipment. 

ElringKlinger fuel cell stacks have been certified by renowned independent testing bodies and are thus equal to all the demands of modern vehicles. As part of this process, for example, vibration and impact tests are carried out to simulate stress to which vehicles are generally exposed. ElringKlinger is able to draw on existing process and quality management that meets the stringent requirements imposed on suppliers to the automotive industry.

Our PEM fuel cell stack has undergone safety-specific assessments in accordance with relevant standards (e.g. DIN EN 62282-2; VDE 0130-2:2013-01) and has been successfully tested with regard to all requirements. On this basis, our NG3 stack has been awarded the TÜV-SÜD (German Technical Inspectorate) certificate.