ElringKlinger AG
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Battery technology. Sustainable solutions
fit for series production.

An efficient energy storage unit is regarded as key technology for future-proof electric vehicles. For many years now, ElringKlinger has been mass-producing various highly cost-effective components for lithium-ion batteries, such as cell contact systems and module connectors. Additionally, we develop and manufacture complete battery modules and systems as well as integrated energy storage units.

Among our core competences is the capacity to bring together a wide range of components as assemblies, while ensuring end-to-end process reliability. This is a compelling advantage within the area of battery technology in particular.

Our products

Cell contact systems

Cell contact systems from ElringKlinger: innovative, cost-effective, all-in-one solutions.

Our high-current-capable contact modules for lithium-ion batteries are tailored precisely to the respective customer requirements and are positioned and welded directly on the group of cells, offering an all-in-one, customized solution.

Other benefits include the optimum compensation of thermal cell expansion and the integration of the necessary sensor technology to monitor current and temperatures. The systems are suitable for use in both hybrid and electric-only vehicles.

Cell contact systems from ElringKlinger are manufactured using a fully automated inline production process and consist of a carrier frame to accommodate busbars and electronic components. The busbars feature a compensating element to reduce the force acting on the cell terminals. Voltage taps monitor the cells and enable active/passive cell balancing. The associated temperature monitor is integrated into the contact system.

Each of our cell contact systems undergoes multiple testing before being shipped to our customers.

Modules as system solution

Modules as system solution

ElringKlinger also supplies end-to-end solutions, e.g. a 48V module producing 1.7  kWh or a 24V module delivering 750 Wh. The integrated components can be designed according to customer specifications, with the choice of cell depending on the application. Moreover, the modular concept can be used as a stand-alone option or in combination with several modules as a high-voltage storage device.

Busbars

Busbars

Busbars carry the current between the individual cells of a module. On the one hand, they have to be as flexible and thin as possible to counteract variations between the cells, while on the other, they need a large diameter to be able to transfer the very high currents involved. ElringKlinger’s specific connection solutions offer both the necessary flexibility and the appropriate cross-sections for optimum current carrying capacity.

Weight-reduced battery casing

Weight-reduced battery casing

We also offer casings for energy storage systems with active/passive cooling components and monitoring electronics. Additional components like gaskets, inserts and pressure equalizing elements can be integrated in accordance with customer requirements. What is special about our casings is their lightweight design. Naturally, they also meet electromagnetic compatibility requirements.

Cell casing

Cell casing

By using proven joining processes the necessary material transitions can already be realized in the cell casing itself. Integrated safety devices, like a pressure relief valve that protects the casing if there is a thermal event, are a feature of our cell casings.

Pressure equalizing elements

Pressure equalizing elements

The housing around an energy storage device represents a large, enclosed air volume. To prevent damage, pressure equalization with the atmosphere is necessary.

ElringKlinger pressure equalizing elements with integrated safety function counteract pressure differences. Thanks to the additional integrated emergency degassing function, the pressure equalizing element opens up a large cross-section in the event of gas emission from a battery cell and therefore allows controlled degassing from the module housing. Thanks to a porous PTFE diaphragm developed in-house, we are able to optimally adjust air flows. In this context, we are able to draw on the PTFE material expertise of our subsidiary
ElringKlinger Kunststofftechnik GmbH.