Power Conversion HIL RIG

CEVT is an engineering and development centre addressing the needs of both Volvo Cars, Lynk & Co and Geely Auto. CEVT covers vital aspects of passenger car development – from architecture, to power train and drive line components, to top hat engineering. Within the module team High Voltage Power System, the Power Conversion group is developing its test capabilities to answer the growing verification needs within CEVT development projects.

Therefore, a new Hardware in the Loop (HIL) was needed to match the testing strategy. Sigma introduced a team to lead and carry out the complete development of this HIL rig. The goal of the High Voltage HIL rig is to allow functional testing of the high voltage system and its components.

The main purpose of the HIL rig is to enable testing of:

• AC charging and DC charging with a simulated battery load
• Conversion between high and low voltage DC
• On board charger features, error handling, communication and control interfaces

Sigma delivered a HIL rig with high voltage capability of charging AC and DC – (400 V) including cabinets, junction boxes, electronically controlled loads, battery model, and control SW integrated in CEVT verification framework and infrastructure. The team did HW development and schematics, Matlab/Simulink based modelling and SW development for CANoe, CAN and Ethernet control busses using Python. The HIL was delivered  to, and installed onsite, CEVT premises in Gothenburg.