MegaEIS – Multi-channel impedance test stand
MegaEIS – Multi-channel impedance test stand
Modular configurable multi-channel (up to 1000 individual cells) impedance test stand for fuel cell and electrolysis cell stacks as well as Li-ion and redox flow battery packsThe MegaEIS multi-channel electrometer/impedance spectroscopy test stand enables the characterisation and optimisation of up to 1000 individual cells, e.g. of a fuel cell or electrolysis cell stack up to 1000 V / 2000 A within a power limit of 250 kW. For tasks in general electrochemical synthesis from water splitting and alkaline CO2 conversion to fuel cells and other energy storage and conversion concepts - also on an industrial scale.
Product Description
With the MegaEIS systems designed for fuel cell stacks and electrolyser cell stacks, it is possible, in addition to individual DC current control in source (electrolyser) or sink (fuel cell) operation, to realise additional AC current modulation of sufficient current strength for electrochemical impedance spectroscopy.
At the same time, not only the entire cell stack is characterised with regard to its impedance response, but also the maximum technically feasible number of 1000 individual cells within the stack.
This will enable the user to individually assess industrially used electrochemical cell stacks for electrochemical energy conversion or storage with high performance and current requirements down to the level of the individual cell, for example to recognise and prevent damage mechanisms at an early stage or to identify operating parameters with negative effects on the performance of the overall stack.
Exemplary MegaEIS solutions can be divided into two different categories – with or without an additional external DC load or source. The MegaEIS systems can be operated without an external DC load up to a maximum of 20 kW dissipated power or with the additionally integrated external DC loads or sources, in principle with unlimited power.
| Voltage | Current (int.) | Current (ext.) | EIS channels | Application |
| 600 V | 120 A | 800 A | 512 | H2FC stack up to 250 kW |
| 30 V | 200 A | – | 24 | H2FC stack up to 4 kW |
| 200 V | 300 A | 300 A | 24 | H2FC stack up to 80 kW |
| 1000 V | 600 A | 1200 A | 128 | H2FC stack up to 50 kW |
| 250 V | 400 A | 400 A | 256 | H2FC stack up to 100 kW |
| 20 V | 500 A | – | 8 | Electrolyser up to 10 kW |
Downloads
Videos
Aktuell sind keine Videos verfügbar.
Specifications
Technical specifications:Power (without external load / booster): 20 kW (max.)
Power (with external load / booster): 250 kW
EIS within 1
mHz – 100 kHz
USB communication
Technical parameters:
Power supply: 110 … 230 V AC / 50 … 60 Hz
3x 400 V AC for higher power requirements
Cooling: Water
cooling
Protection class (sealing of mechanical
enclosures against water and dust): IP20
Input voltage: 1000 V (max.)
Input current: 2000 A (max.)
Data acquisition speed:
24-bit ADCs, 50/60 Hz filtered (DC)
24-bit ADCs, up to 1.25 MHz for EIS measurements (AC)
Resolution: 0.001% of the selected range
Measurement methods:
Polarisation curves, chronopotentiometry, chronoamperometry, EIS (electrochemical impedance spectroscopy), CVM (Cell Voltage Monitoring), etc.
EIS amplitude: 20% of the maximum available input current for < 1 kHz
Voltage range per EIS channel: ± 3 V (can be adjusted on request)
Number of EIS channels:
1000 (max.;
limited by maximum voltage)
8 channels per module
Communication: Ethernet
Software:
Control software for MS Windows including parameter setup for the experiment,
experiment control, data acquisition, data processing and visualisation.
Programming
languages:
Pascal or Python
Remote control
:
Remote control via TCP/IP server for integration into a higher-level control system. Programming examples for remote control using Python or LabView are available
Options and Accessories
Thermostat (Julabo, Lauda, Huber, etc.) or heat exchanger
