Vehicle External Power Relay Control for Parked Equipment
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Solution Overview
Problem
Vehicle electrical equipment faces challenges when parked, as using the engine for power causes environmental pollution and using the battery can lead to over-discharge, preventing vehicle restart.
Innovation Solution
A power supply control method that determines if an external power source is connected and within a predetermined voltage range, switching on a relay to use the external power source instead of the engine or battery for powering electrical equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the engine is used to supply power to electrical equipment while the vehicle is parked, then the electrical equipment can operate continuously, but environmental pollution is caused at the parking place
Solution Approach 1:
The patent introduces an external power source as an intermediary to supply power to the electrical equipment during vehicle parking. The power interface and relay circuit serve as mediation components that enable the external power source to replace the engine, thus eliminating exhaust emissions at the parking location while maintaining continuous operation of electrical equipment.
2Object-affected harmful factors
If the battery is used to supply power to electrical equipment while the vehicle is parked, then environmental pollution is avoided, but the battery may be over-discharged, resulting in failure to restart the vehicle
Solution Approach 1:
The external power source acts as an intermediary that supplies power during parking without depleting the vehicle's battery. The control unit monitors battery voltage and selectively engages the external power source through the relay circuit, ensuring the battery maintains sufficient charge for vehicle restart while still enabling electrical equipment operation during parking.
Solution Approach 2:
The control unit implements feedback control by monitoring the battery's voltage level and the state of the external power source connection. Based on this feedback, the control unit intelligently switches between battery power and external power source, preventing battery over-discharge while ensuring continuous power supply to electrical equipment.
3Reliability
If a power interface and relay circuit are added to enable external power source connection, then the battery can be protected from over-discharge, but the device complexity increases
Solution Approach 1:
The power interface is designed with multi-functionality, serving both as a physical connection point for external power sources and as a signal detection interface. The relay circuit performs multiple functions including power switching, isolation protection, and control signal transmission. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in system complexity.
Data Source
AI summary
The present disclosure relates to a power supply control method for a vehicle, a vehicle, a control unit, a computer-readable storage medium and a computer program product. The vehicle comprises an electrical equipment, a relay and a power interface, wherein the power interface is electrically coupled to the electrical equipment via the relay. The method comprises: determining whether the power interface is coupled to an external power source; determining whether a voltage of the external power source is within a predetermined range when the power interface is coupled to the external power source; and controlling the relay to be switched on in response to the voltage of the external power source being within the predetermined range.