EV Charging Connector Signal Switching for Mode Detection
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Solution Overview
Problem
Existing charging and power supply devices for electrified vehicles require complex configurations and additional components for communication to determine whether they are performing charging or power supply operations, leading to increased complexity.
Innovation Solution
A charging and power supply device with a connector, power paths, signal lines, and resistance units that use different resistance values and a switching unit to indicate the operation being performed through voltage changes on the signal line, allowing the vehicle to determine the operation without the need for additional communication components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If communication components such as microcomputers are added to determine charging or power supply operations, then the vehicle side can grasp the operation being performed, but the number of components increases and the configuration becomes complicated
Solution Approach 1:
The patent introduces a signal line as an intermediary component that transmits operation status information between the charging and power supply device and the vehicle side. Instead of using complex communication protocols with microcomputers, the signal line directly conveys the operation mode (charging or power supply) through simple electrical signals, thereby reducing device complexity while maintaining effective information transfer
Solution Approach 2:
The patent utilizes changes in electrical parameters (voltage levels or signal states) on the signal line to encode operation status information. By varying the electrical parameter states according to the operation mode, the system can communicate operational information without requiring complex communication hardware, thus resolving the contradiction between information transmission and device complexity
2Ease of operation
If additional communication components are installed to notify the vehicle of the operation mode, then the vehicle can be operated together with the selected operation, but the system complexity and component count increase
Solution Approach 1:
The signal line serves as a simple intermediary that provides the vehicle side with the necessary operation status information without requiring complex communication systems. This enables the vehicle to coordinate its operation with the charging or power supply mode while keeping the overall system complexity low
Solution Approach 2:
The charging and power supply device automatically notifies the vehicle side of the operation mode through the signal line without requiring additional control or communication processing. This self-service approach to information notification simplifies the system while ensuring proper operational coordination
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
Simplifies the notification of operations to the vehicle, reducing the complexity of the system and eliminating the need for additional communication components, thereby enhancing operational efficiency.
Implementation Method 1
a first resistance unit that has one end connected to a constant voltage portion and that has a first resistance value; a second resistance unit that has one end connected to the constant voltage portion and that has a second resistance value different from the first resistance value
Data Source
AI summary
A power supply device according to an embodiment of the present disclosure includes: a connector connected to a charging and power supply port of a vehicle having a power storage device; a charging path for supplying power from a power supply PS to the vehicle through the connector to charge the power storage device; a power supply path for supplying power from the power storage device to the outside of the vehicle through the connector; a signal line connected to the vehicle through the connector; a resistance circuit having one end connected to a GND potential and having a resistance value R1; a resistance circuit having one end connected to a GND potential and having a resistance value R4; and a changeover switch for switching a state of connecting the signal line and one of the other end of the resistance circuit and the other end of the resistance circuit.