Battery Swap Tray Positioning With Rotational Alignment Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Battery replacement in electric vehicles often fails due to alignment issues between the tray extension and the vehicle, caused by the electric vehicle skewing relative to the battery replacement equipment, leading to misalignment and failure in battery replacement.
Innovation Solution
A tray extension positioning method using sensors to detect distance signals and determine the tray's position relative to the target, allowing it to adjust its movement speed and direction to align properly, including linear and rotational movements, and utilizing different speeds to ensure accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the tray extends out in linear motion only, then the structure is simple, but the alignment accuracy with the electric vehicle deteriorates due to vehicle skewing
Solution Approach 1:
The patent transforms the tray from a purely linear motion mechanism to a dynamic mechanism that combines linear extension with rotational adjustment. The tray can now perform both linear movement (for extension) and rotational movement (for alignment correction), allowing it to adapt to vehicle skewing and achieve accurate positioning despite the vehicle's uncertain stopping position.
Solution Approach 2:
The patent changes the motion parameters of the tray by introducing rotational degrees of freedom in addition to linear translation. This parameter expansion allows the tray to adjust its orientation angle dynamically, compensating for alignment errors caused by vehicle positioning variations and achieving precise alignment with the battery supporting device.
2Productivity
If the tray moves at high speed, then the productivity is improved, but the positioning accuracy deteriorates due to inability to adjust for alignment errors
Solution Approach 1:
The patent implements a multi-stage motion sequence for the tray: first a high-speed linear extension phase to quickly reach the target area, followed by a rotational adjustment phase to achieve precise alignment. This periodic action pattern allows the system to combine fast movement with accurate positioning, maintaining both productivity and precision.
Solution Approach 2:
The tray performs preliminary high-speed linear extension to quickly close the distance to the vehicle, then performs rotational adjustment as a follow-up action to fine-tune the alignment. This preliminary action approach allows the system to maximize speed during the majority of the movement while dedicating a smaller time window to precision alignment.
3Device complexity
If the tray only performs linear motion, then the device complexity is low, but the adaptability to vehicle positioning errors deteriorates
Solution Approach 1:
The patent makes the tray motion system dynamic by adding rotational capability to the basic linear extension mechanism. This dynamic enhancement allows the tray to adapt its motion trajectory and orientation in real-time based on the vehicle's actual position, significantly improving adaptability to positioning errors while maintaining relatively simple overall system architecture.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A tray extension positioning method and system, the tray extension positioning method comprising: acquiring a first detection state of a first sensor (31) and a second detection state of a second sensor (32); determining the first detection state and the second detection state; if the first detection state is that a first distance signal is detected and the second detection state is that a second distance signal is not detected, driving a tray to rotate and move along a rotational direction; if the first detection state is that the first distance signal is not detected and the second detection state is that the second distance signal is detected, driving the tray to rotate and move along a counter-rotational direction opposite to the clockwise direction. The present tray extension positioning method and system may determine the distances between a first position and second position of the tray and a target, thereby determining whether the tray is aligned with the target; if so, the tray may continue to move in a straight line; if not, the tray may rotate until aligned, thereby avoiding power switching failure.