Software controlled solid-state switch

The software-controlled solid-state switch system addresses the lack of advanced detection in existing switches by using a microcontroller unit for sensing and managing high-voltage conditions, ensuring safe and reliable operation through precise fault detection and control.

WO2026147930A1PCT designated stage Publication Date: 2026-07-09VISTEON GLOBAL TECHNOLOGIES INC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
VISTEON GLOBAL TECHNOLOGIES INC
Filing Date
2025-12-30
Publication Date
2026-07-09

AI Technical Summary

Technical Problem

Existing solid-state switches lack advanced software-controlled functionalities for detecting and managing high-voltage conditions, such as pre-charge, overcurrent, overtemperature, and short circuits, which are critical for safe and efficient operation in high-voltage applications.

Method used

A software-controlled solid-state switch system incorporating a microcontroller unit (MCU) with integrated sensing and detection capabilities, including current, voltage, and temperature sensing, to perform pre-charge detection, I2t calculations, overcurrent detection, overtemperature detection, and short circuit detection, with a bus interface for reporting to a battery management system.

Benefits of technology

Enables precise control and management of high-voltage conditions, ensuring safe operation and extending the life of the switch by detecting and responding to potential faults, thereby enhancing safety and reliability in high-voltage environments.

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Abstract

A solid-state switch includes a power board and a control board. The power board is operational to switch on / off a high-voltage current, measure the high-voltage current, and sense a high voltage. The control board includes a microcontroller unit and a bus interface circuit. The control board is operational to pass control signals from the microcontroller unit to the power board for switching of the high voltage current, and pass sensed data from the power board to the control board for the high voltage current and the high voltage. The microcontroller unit is operational to calculate a pre-charge detection, an ampere squared seconds detection, an over current detection, an over temperature detection, and a short circuit detection, and report the detections external to the control board via the bus interface circuit.
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