How to Fix Inaccurate EIS in Parallel Setups

Solving Inaccurate EIS in High-Current Parallel Setups: The Kolibrik Approach

Have you ever tried to parallelize a potentiostat with a booster or a 3rd-party cycler, only to end up frustrated with inaccurate Electrochemical Impedance Spectroscopy (EIS) results? Standard parallelization setups often lead to compromised data and measurement artifacts. When 100 A is not enough for testing hydrogen technologies, batteries, or supercapacitors, scaling up power shouldn't mean sacrificing precision.

At Kolibrik, we have developed a reliable method to bypass the inherent flaws of ordinary parallelization. By connecting our instruments with 3rd-party equipment using an external current probe, you can acquire reliable, true data even at extreme currents.

This approach fundamentally changes how high-power electrochemical testing is executed:

• Exact EIS measurements: An external current probe ensures true precision by eliminating common setup errors and artifacts.
• Extended range: Scale up your current and power capabilities seamlessly without hardware bottlenecks.
• Dynamic EIS testing: Perform accurate measurements continuously during active charging and discharging phases.
• Full flexibility: Choose between digital or manual control protocols for the connected external device to fit your lab's workflow.

Enhancing Kolibrik Potentiostats

Our heavy-duty 4-quadrant potentiostats are built to integrate flawlessly with your existing high-power infrastructure, ensuring that your standalone testing stations can scale when needed:

• High-Current Parallelization: Seamlessly integrates with 3rd-party boosters, electronic loads, and cyclers to extend current and power ranges.
• Artifact-Free EIS: Utilizes an external current probe to prevent measurement errors typical in standard parallel setups, guaranteeing highly accurate EIS.
• Dynamic In-Operando Testing: Enables precise EIS data acquisition continuously during active charging and discharging processes.
• External Device Control: Supports both digital and manual control protocols for connected 3rd-party power equipment.

Scaling Up with MegaEIS

For simultaneous multi-channel acquisition, the MegaEIS System brings the same uncompromised precision to large-scale operations and gigafactory testing lines:

• 3rd-Party Cycler Integration: Designed for easy parallelization with existing commercial cyclers and power supplies for high-power battery and hydrogen technology testing.
• True Impedance Measurement: Employs an external current probe architecture to ensure exact, artifact-free EIS results at extremely high currents.
• Dynamic EIS Capability: Capable of performing real-time impedance spectroscopy on energy storage devices under load (during charge/discharge phases).
• Scalable Testing Infrastructure: Allows for significant upscaling of testing power without sacrificing the precision of high-frequency impedance data.

Stop struggling with inaccurate data from basic parallel setups. Explore our Potentiostat Lines and MegaEIS Systems to see how our instruments can upgrade your high-current testing workflow.

Tell us about your testing setup. Whether you need seamless 3rd-party integration, multi-channel EIS scaling, or a complete end-to-end automated test rig — we’re here to help. Contact us and send us a few details about your current equipment, and our engineers will get back to you with the right architecture ideas, integration options, and the next steps.