PXI multi-cell battery simulator modules

October 14, 2021 // By Jean-Pierre Joosting
PXI multi-cell battery simulator modules
Battery simulator modules simplify voltage and current readback and improve accuracy for validating battery management systems.

Pickering Interfaces has launched a new family of battery simulator modules, ideal for Electric Vehicle (EV) battery stack emulation in Battery Management Systems (BMS) test applications. The 41-752A (PXI) and 43-752A (PXIe) modules enable direct voltage and current readback either via programming or using Pickering's soft panel control. Each cell simulator is highly accurate, specified at ±5 mV from 1 V to 7 V.

Targeting EV, automotive, aerospace, energy storage and electric aircraft applications, the new battery simulator modules occupy a single PXI slot. They are available with two, four or six battery cell simulators per module that are fully isolated from ground and from each other facilitating series connection to simulate batteries in a stacked architecture. The 750 V isolation barrier allows the modules to be used to simulate lower power battery stacks that are commonly used for vehicle propulsion. Battery charging emulation is available up to 100 mA.

Each cell provides independent power and sense connections, allowing the simulator to sense a remote load and correct for wiring losses. The battery simulator is designed to respond to dynamic loads, minimizing the need for local decoupling capacitors at the load. The module can also independently read the voltage at the load (via sense lines) and output current for each cell. When supplied with I/V readback, the driver can automatically adjust the module's output voltage through a feedback system, allowing higher accuracy.

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