V2V Charging Cable Proximity Detection and Control
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Solution Overview
Problem
The existing charging infrastructure for electric vehicles is inefficient due to longer charging times and insufficient infrastructure, making it difficult to commercialize electric vehicles, and there is a need for a vehicle-to-vehicle charging method to address the energy supply and demand imbalance as demand for electric vehicles increases.
Innovation Solution
A vehicle-to-vehicle charging cable that determines the connection state of charging connectors using a proximity detection voltage standard, featuring connectors with proximity detection pins and a communication controller to manage power supply and charging state signals, allowing for efficient charging between vehicles without requiring separate communication controllers on each vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a charging cable connects proximity detection pins from both connectors, then connection state detection is enabled, but the proximity detection voltage standard cannot be satisfied and connection state determination becomes inaccurate
Solution Approach 1:
The patent extracts the proximity detection pin connection from the charging cable, making the cable non-connecting for these pins. Instead, the charging vehicles themselves establish the detection circuits through their internal resistance networks, allowing accurate voltage-based connection state detection without compromising the proximity detection voltage standard
Solution Approach 2:
The patent introduces the charging vehicle's internal resistance network as an intermediary element. The resistance in the charging vehicle creates a voltage divider effect that generates the proximity detection voltage signal, enabling accurate connection state determination without direct pin connection through the cable
2Reliability
If separate communication controllers are installed on each charging vehicle, then connection state determination and charging control are more reliable, but the system complexity and cost increase
Solution Approach 1:
The patent merges the communication control function into a single communication controller located in one of the charging vehicles. This single controller manages the entire charging process including connection state determination, charging control, and communication with both vehicles, eliminating the need for separate controllers on each vehicle while maintaining system reliability
Solution Approach 2:
The communication controller is designed with multi-functional capabilities, handling connection state detection, charging power control, communication protocols, and safety monitoring all through a single device, reducing overall system complexity while maintaining comprehensive control functionality
Data Source
AI summary
A charging cable includes a first connector including a first proximity detection pin and a first power pin; a second connector comprising a second proximity detection pin and a second power pin; and a cable electrically connecting the first power pin of the first connector and the second power pin of the second connector, wherein the cable may not connect the first proximity detection pin and the second proximity detection pin.