32-bit vehicle control unit system based on functional safety design

Abstract

The invention discloses a 32-bit vehicle control unit system based on functional safety design. The system comprises a power supply circuit for providing required electric energy for a control systemcircuit, a CAN communication circuit and an analog voltage acquisition circuit; the CAN communication circuit used for realizing acquisition and control of signals of a motor, a battery, a DCDC and aDCAC; a PWM output circuit used for converting 3.3 V PWM signals of the control system circuit into 24V pulse signals and outputting the 24V pulse signals; a high-side driving circuit used for realizing driving control in front of a load; the analog voltage acquisition circuit used for realizing acquisition of analog voltage signals; a low-side driving circuit used for realizing driving control after being loaded; a digital signal input circuit used for acquiring high and low level signals; and a pulse acquisition circuit used for acquiring pulse signals. The problems that a 16-bit main chip is low in main frequency and few in resource and cannot meet the functional safety requirement are solved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and more specifically relates to a 32-bit vehicle controller system based on functional safety design. Background technique [0002] The electric vehicle vehicle controller VCU (Vehicle Control Unit) is the core component of the electric vehicle control system. It is used to control the start, operation, advance and retreat, speed, stop and other electronic components of the electric vehicle motor. device. As the core component of the pure electric vehicle control system, the VCU undertakes the tasks of data exchange, safety management, driver intention interpretation, and energy flow management. [0003] Domestic vehicle control companies mostly develop vehicle controllers based on 16-bit single-chip microcomputers. With the application of unmanned driving and functional safety, higher requirements are placed on the functionality and performance of vehicle controllers. Development is ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a 32-bit vehicle controller system based on functional safety design, which solves the problems of low main frequency and few resources of the 16-bit main chip, which cannot meet the functional safety requirements, and has few parts and strong performance , with the characteristics of low price and high reliability

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