Flexible PXI-based BMS Test System Demonstration

Above is a demo of a flexible PXI-based BMS test system, developed in partnership with Austin Consultants. This PXI Battery Management System (BMS) Test system allows an operator to simulate a simple battery model and test scenarios via an intuitive user interface. It demonstrates how our feature-rich battery simulation, fault insertion and RTD simulation modules can seamlessly function together in a flexible and scalable test platform.

Why is BMS testing so important? Safety and Performance

Lithium-Ion batteries are intrinsically unstable and can result in thermal runaways when used beyond their safe operation.
BMS constantly monitors voltages and temperatures across individual cells and current across the battery pack.
In case of a fault, the BMS must take appropriate actions to ensure the safety of the end users.
Accurate and effective estimation of state-of-charge (SOC) helps protect the battery, prevent overcharge or discharge, and improve the battery life.
By providing effective cell balancing techniques, the BMS improves the available capacity of the battery pack and increases the longevity of battery cells.

So why simulate?

During BMS development, engineers need to reliably test the BMS under real-world conditions to complete their verification and validation plans.
Test strategies such as Hardware-in-the-Loop (HIL) testing are often performed at this stage.
HIL testing involves simulating physical inputs and external connections to the pack while monitoring its outputs and behavior relative to design requirements.

Why not use real-world stimulus?

Time to Test: You would need to cycle battery packs and manipulate real-world conditions.

Repeatability: Age and conditions can drastically affect results.

Cost: You would need a setup for every BMS use case, leading to purchase and storage expenses. In addition, these setups would need regular maintenance and upgrade.