Bidirectional Vehicle-to-Home Power Supply Control
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Solution Overview
Problem
Existing electric power supply systems for vehicles and homes primarily focus on either plug-in or plug-out power supply, failing to effectively utilize power in both directions and efficiently manage temperature adjustments for vehicular power sources like fuel cells or batteries, leading to wastage and increased component costs.
Innovation Solution
An electric power supply system that includes a power source connecting element, vehicular power state detecting element, and power supply controlling element to switch between plug-in and plug-out power supplies based on detected states, allowing for bidirectional power flow and temperature adjustment, thereby utilizing power from both vehicular and household sources efficiently and reducing component costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a high-rated resistor is installed in the vehicle to consume generated power during warm-up operation, then the power can be consumed, but the component cost and mounting space increase
Solution Approach 1:
The power cable serves as an intermediary to transfer generated power from the vehicle to the house. Instead of consuming power internally through a resistor, the system uses the existing power cable infrastructure to export power externally, eliminating the need for high-rated resistors in the vehicle while still achieving power consumption
Solution Approach 2:
The house serves as a self-service power consumer, utilizing its own existing infrastructure (outlet and power consumption capability) to absorb the generated power from the vehicle. This eliminates the need for the vehicle to carry its own power consumption equipment
2Loss of energy
If only plug-in power supply is implemented, then the battery can be charged, but the vehicular power source cannot supply power to the house
Solution Approach 1:
The power supply system is designed with multi-functionality, allowing the vehicular power source to perform both traditional charging functions (plug-in) and new power export functions (plug-out). The same power cable and connector infrastructure supports bidirectional power flow, making the system universal and adaptable to different power supply scenarios
3Productivity
If the vehicle is driven during connection, then the motor can operate, but power theft cannot be prevented
Solution Approach 1:
The system performs preliminary authorization checks before allowing power supply. The power supply controlling element determines whether power supply is permitted based on predetermined conditions (such as vehicle stationary status) before enabling bidirectional power flow, preventing power theft before it can occur
Solution Approach 2:
The power supply controlling element continuously monitors system state and provides feedback control. It determines whether to permit power supply based on real-time conditions, adjusting the power supply state dynamically to prevent power theft while maintaining vehicle operation capability when appropriate
Data Source
AI summary
An electric bower supply system includes a power supply controlling element (62) configured to switch a plug-out power supply which supplies electric power (75) from a fuel cell (20) or a battery (21) to a house (70) and a plug-in power supply which supplies electric power from a commercial power source (75) disposed in the house (70) to a fuel cell vehicle (1a) on the basis of a vehicular power state of the fuel cell (20) and the battery (21) detected by a vehicular power state detecting element (61) and a household power state of the commercial power source (75) detected by a household power state detecting element (81) when a receptacle (10) of the fuel cell vehicle (1a) and an outlet (71) of the commercial power source (75) have been connected by a power cable (100).