Vehicle Power Feeding Device External Grid Failure
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Solution Overview
Problem
Existing power supply systems from vehicles to external loads fail to provide power when the external commercial power supply is unavailable, as they cannot determine the power specification to convert vehicle power suitably for household appliances.
Innovation Solution
A power supply system with a vehicle and a power feeding device that includes a communication unit, power supply unit, and control device to convert and supply power from the vehicle to external loads when the external power supply fails, using a switch unit to compare voltages and activate communication based on available power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle is configured to supply power to external loads when external power supply fails, then the reliability of power supply to external loads is improved, but the device complexity increases due to the need for voltage comparison switch unit and communication activation mechanism
Solution Approach 1:
The power supply system automatically detects external power supply status and activates communication functions using vehicle power when external power fails, without requiring manual intervention. The control unit autonomously switches between power sources and manages communication activation, enabling the system to serve itself during power failures.
Solution Approach 2:
The system pre-configures the voltage comparison switch unit and communication activation mechanism in advance, so that when external power supply fails, the transition to vehicle power supply can occur immediately without delay. The communication unit is pre-capable of receiving power from either source, allowing instant switching.
2Loss of information
If the communication unit is activated using vehicle power when external power fails, then the ability to transmit power specifications is improved, but the power consumption from the vehicle increases
Solution Approach 1:
The control unit continuously monitors the status of external power supply and actively manages the activation of communication functions. When external power is available, communication uses external power. When external power fails, the control unit detects this condition and switches communication power source to vehicle power, providing feedback-based power management that minimizes vehicle power consumption while ensuring communication capability.
3Ease of operation
If the system automatically switches between external power and vehicle power, then the ease of operation is improved, but the reliability may worsen due to potential switching failures
Solution Approach 1:
The voltage comparison switch unit is pre-configured with voltage detection capabilities for both external power and vehicle power sources. The control unit continuously monitors voltage levels and prepares switching mechanisms in advance, so that when a power failure occurs, the switch can immediately transition to the backup power source without interruption or failure, cushioning against potential switching reliability issues.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures stable power supply from the vehicle to external loads during external power failures by activating communication and converting power according to the load specification, ensuring compatibility and continuity of power delivery.
Implementation Method 1
a switch unit configured to compare voltages and activate communication based on available power sources
Implementation Method 2
a power feeding unit for receiving power from the power generation unit and supplying the received power to the power feeding device, and a control device that controls the power feeding unit to convert the power received from the power generation unit into power to drive the load
Data Source
AI summary
A power feeding device (200, 300) for receiving power from a vehicle (10) and feeding the received power to a load (400) external to the vehicle includes: a communication unit (240, 350) for communication between the vehicle (10) and the power feeding device (200, 300); and a power supply unit (380) that supplies the communication unit (240, 350) with power. When an external power supply (500) has failed, the power feeding device (200, 300) supplies the power that is received from the vehicle (10) to the power supply unit (380) to activate the communication unit (240, 350), and the power feeding device (200, 300) also transmits via the communication unit (240, 350) to an ECU (130) of the vehicle (10) a specification regarding power supplied from the external power supply (500) to the load (400). While the ECU (130) follows a predetermined specification to control the power feeding unit (120), once the specification regarding power supplied from the external power supply to the load has been received, the ECU (130) follows the received specification, rather than the predetermined specification, to control the power feeding unit (120).