Vehicle Communication System Bidirectional Power Transfer
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Solution Overview
Problem
Existing communication systems for vehicles primarily focus on charging operations and lack effective communication during power discharging from vehicles to external facilities, limiting their utility in bidirectional energy transfer.
Innovation Solution
A communication system that includes a vehicle and a communication device with signal generating units, resistance circuits, and control units to manage operation modes for both power reception and supply, enabling communication and power transfer between vehicles and external facilities, including system interconnection and independent power generation modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If communication systems are designed for charging operations only, then charging communication functionality is achieved, but power discharging communication capability is lost
Solution Approach 1:
The communication system is designed to handle multiple operation modes (charging, discharging, system interconnection, independent power generation) using a unified communication protocol and signal processing architecture. The vehicle control unit and communication device can interpret resistance values and signal potentials to determine and respond to different operation modes, making the system versatile without requiring separate communication systems for each mode.
2Device complexity
If resistance circuits are used for communication, then simple signal transmission is achieved, but bidirectional communication capability is limited
Solution Approach 1:
The communication system dynamically adapts its behavior based on the detected operation mode. The vehicle control unit changes the resistance value of the second resistance circuit after completing operation mode setting, allowing the system to transition between different communication states. This dynamic adjustment enables bidirectional communication capability while maintaining a relatively simple circuit structure, as the same physical circuits serve multiple communication purposes depending on their state at different times.
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
Enables bidirectional communication and power transfer between vehicles and external facilities, allowing vehicles to act as both power receivers and suppliers, enhancing energy management and utilization in grid-connected and disconnected scenarios.
Implementation Method 1
positive amplitude and negative amplitude of the signal output by the signal generating unit are divided by the first resistance circuit and the second resistance circuit
Data Source
AI summary
A communication device includes a first resistance circuit (RB) connected between an output of a signal generating unit (602) and a first terminal (TS1) and having a resistance value corresponding to a requested operation mode requested to a vehicle. The vehicle (10) includes: a second resistance circuit (RA) connected between a ground node (512) fed with a reference potential and a second terminal (TS2); and a vehicle control unit (508) for setting an operation mode of the vehicle. The vehicle control unit (508) detects a signal potential of a signal (CPLT) via a first signal extraction node (N1) provided on a path connecting the second terminal (TS2) and a second resistance circuit (RA) to each other, and sets the operation mode of the vehicle (10) at the requested operation mode corresponding to the resistance value of the first resistance circuit (RB).