Electric vehicle pcu weak current power supply system

Abstract

The invention relates to a weak-current power supply system for a power control unit (PCU) of an electric automobile, which comprises a storage cell, a usual power supply circuit and an unusual power supply circuit, wherein the storage cell supplies electricity to a minimum singlechipystem circuit of a vehicle control unit (VCU) module, a DI (discrete input) / DO (discrete output) unit circuit and a CAN communication interface circuit via the usual power supply circuit, and the storage cell supplies the electricity to an AI (analogue input) / AO (analogue output) unit circuit, a motor controller module, the relay group of the VCU module and a contactor of a high-voltage power distribution module via the unusual power supply circuit only when the switch of the electric automobile is turned off. According to the weak-current power supply system, the usual power supply circuit and the unusual power supply circuit are adopted to provide two power supply modes namely usual power supply and unusual power supply for PCU, and the electricity is supplied to partial circuits, which need to work, of the VCU module in standby when the switch of the electric automobile is turned off so as to ensure the awakening of the electric automobile, also reduce the standby power consumption to the greatest extent and solve the problem of long-time storage of the electric automobile. The weak-current power supply system is greatly convenient for use of a user, improves the rigid index of the electric automobile and is green and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, and more specifically relates to a PCU weak current power supply system of an electric vehicle. Background technique [0002] At present, new energy vehicle technology is gradually shifting from the laboratory to the stage of productization. Energy saving, miniaturization, economy, and light weight have become the development direction of the industry. As its core component, the power control system (PCU) has higher requirements for its performance parameters. , where the index of power consumption is one of them. [0003] The power control system (PCU) is the core component system of the electric vehicle, which is responsible for multiple functions such as control, calculation, signal conversion processing, fault diagnosis, communication and driving. Carry out reasonable power distribution and coordinate the energy flow among various components to improve the power, safety and efficie...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a PCU weak current power supply system for electric vehicles in view of the defect that the existing electric vehicle PCU weak current power supply continuously supplies power to the battery so that the standby power consumption is large

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