Automatic EV Charging Manipulator Using Coordinate Transformation
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Solution Overview
Problem
Conventional charging robots for electric vehicles require excessive degrees of freedom and precise recognition sensors to locate and connect with various charging ports, leading to inefficiencies in charging operations.
Innovation Solution
An apparatus and method that utilize sensors on the vehicle and infrastructure to calculate the vehicle's position and recognize the charging port, allowing a manipulator to connect a charging plug to the port for automatic charging, reducing the need for additional recognition sensors and optimizing the charging process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional charging robots use precise recognition sensors to locate charging ports, then the recognition accuracy of charging ports is improved, but the device complexity and cost increase
Solution Approach 1:
The patent introduces an intermediary coordinate transformation system that converts vehicle body coordinates to charging station coordinates through calculated transformation matrices. This intermediary mathematical model enables the charging robot to locate charging ports without requiring complex precise recognition sensors, as the position is derived through coordinate transformation rather than direct sensor detection.
Solution Approach 2:
The patent replaces the mechanical sensor-based recognition system with a computational coordinate transformation system. Instead of using complex optical or tactile sensors to directly detect charging port positions, the system uses mathematical calculations based on vehicle information and parking data to determine port locations, substituting mechanical detection with computational methods.
2Adaptability or versatility
If conventional charging robots use multiple degrees of freedom to adapt to various charging ports, then the adaptability of the charging robot is improved, but the device complexity increases
Solution Approach 1:
The patent achieves adaptability to various charging ports by changing the parameters of the coordinate transformation model rather than changing the physical structure of the manipulator. The system adapts to different vehicle types and charging port positions by adjusting transformation matrices and coordinate systems through software calculations, maintaining a fixed manipulator structure while achieving versatility.
Solution Approach 2:
The patent creates a universal charging system that can handle various charging port positions and vehicle types through a unified coordinate transformation approach. The same manipulator structure and charging plug can serve multiple functions across different vehicle models by using adaptable coordinate transformation algorithms, eliminating the need for multiple specialized manipulators.
3Reliability
If conventional charging robots use complex sensor systems to recognize charging ports, then the recognition rate of charging ports is improved, but the loss of time for charging operations increases
Solution Approach 1:
The patent performs preliminary coordinate transformation calculations before the actual charging operation. By pre-establishing the coordinate transformation relationships between vehicle body coordinates and charging station coordinates, and pre-calculating charging port positions based on vehicle information and parking data, the system eliminates the need for time-consuming real-time sensor scanning and recognition during charging operations.
Data Source
AI summary
An apparatus and a method for automatically charging a vehicle include a charging plug to connect to a charging port of the vehicle, a manipulator to move the charging plug to the charging port of the vehicle, a power supply connected with the charging plug to supply charging power to the vehicle, and a processor. The processor obtains vehicle information and parking information through communication with the vehicle when recognizing parking of the vehicle, calculates a vehicle position using the vehicle information and the parking information, recognizes the charging port of the vehicle based on the calculated vehicle position, and controls the manipulator to connect the charging plug to the charging port of the vehicle such that a battery of the vehicle is charged.