ST VCU Vehicle Controller Demonstration

The vehicle controller VCU (vehicle control unit) is the core component of the new energy vehicle, which can collect the driver's operation input, including sensor signals such as accelerator pedal, brake pedal and gear position; complete the output control of the electrical system, including the control of relays, water pumps, cooling fans, etc.

Realize the information interaction with other systems, including the interaction with OBC (on-board charger), BMS (battery system) and other high-voltage components to complete charging and high-voltage power up and down, the interaction with MCU (motor controller) to complete drive control, and the interaction with EPB/EPS/ESP (chassis electronic control system) to complete charging and high-voltage power down, It also interacts with other systems, including OBC (on-board charger), BMS (battery system) and other high-voltage components to complete charging and high-voltage power up and down, MCU (motor controller) to complete drive control, and EPB/EPS/ESP (chassis electronic control system) to complete driving safety control.

ST VCU Demo is a specific application based on ST VCU Solution. Input signals include gear switch, accelerator pedal, brake pedal, and OBC charging interface. The output control includes main positive, main negative, pre-charge, DC/DC, OBC+, OBC- high voltage relay drive, motor controller MCU, OBC power supply control relay drive, high voltage interlock signal output input and fault indication, charging interface electronic lock motor drive and position signal detection, CC, CP signal detection, charging and charging completion indication; high speed CANFD interface.

▲ Block diagram of ST VCU Demo system

The demo input and output control modules are all original parts, and the basic control and diagnosis functions (relay up and down power timing control, torque calculation output, electronic locking and unlocking, HVIL detection of high voltage interlock signal, etc.) can be completed by simulating other modules (BMS, OBC, MCU) data through Pad GUI and Tbox.

The combination of SPC574K+L9788 powerful computing and control capabilities perfectly meets the needs of AUTOSAR and functional safety, while its high level of functional integration can also bring about a reduction in BOM costs, and the mature and complete supporting resources (evaluation demo board, schematics, reference source code, design documentation, and studio development environment) can significantly reduce development difficulties and shorten the development cycle.

▲ ST VCU Demo Evaluation Board

According to the different demonstration scenarios, ST VCU Demo is divided into two sets: Standalone and real car demo car.

▲ Demo Car VCU

▲ Standalone VCU

► Scenario Application Diagram

► Demo Board Photo

► Solution Cube Diagram

►Core Technology Advantage

The combination of SPC574K+L9788 powerful computing and control capabilities can perfectly meet the needs of AUTOSAR and functional safety, while its high functional integration can also bring about BOM cost reduction, and the mature and complete supporting resources (evaluation demo board, schematic diagram, reference source code, design documentation, studio development environment) can significantly reduce development difficulties and shorten the development cycle.

►Specifications

• Support 12V and 24V systems.
• Multiple current controlled high/low side control outputs
• ETC full bridge control (DC brushed motor)