AGV Wireless Charging Capacitor Voltage Stabilization
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Solution Overview
Problem
AGVs in existing systems face limitations in continuous operation due to incomplete battery charging during short loading/unloading times, requiring frequent battery replacement or external charging, which disrupts transportation operations.
Innovation Solution
The system incorporates a power transmitter and receiver with a capacitor that wirelessly charges the AGV's battery while it travels, allowing the AGV to maintain a stable voltage by storing energy from one charge position to the next, ensuring continuous operation without the need for external charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless power transmission is used to charge the battery during short loading/unloading times, then the charging speed is improved and connection complexity is reduced, but the battery cannot be fully charged and voltage gradually decreases
Solution Approach 1:
The patent segments the power storage function by introducing a capacitor as a separate energy storage component distinct from the battery. The capacitor handles short-term energy buffering during charging cycles, while the battery provides long-term energy storage. This segmentation allows the system to accept rapid wireless charging without overcharging the battery, maintaining voltage stability while enabling fast charging during brief loading/unloading intervals.
Solution Approach 2:
The capacitor acts as an intermediary energy buffer between the wireless power transmitter and the battery. During wireless charging, the capacitor first stores the transmitted energy and then releases it to charge the battery gradually, preventing direct voltage spikes and ensuring stable battery charging even during short stopping periods. This intermediary mechanism resolves the conflict between fast charging requirements and battery voltage stability.
2Reliability
If the AGV stops frequently at loading/unloading positions for charging, then battery voltage decrease is suppressed, but the transportation operation is suspended and continuous use time is limited
Solution Approach 1:
The system performs preliminary energy storage in the capacitor during each stopping period at loading/unloading positions. By accumulating energy in the capacitor during these brief intervals, the AGV prepares sufficient energy buffer before resuming travel. This preliminary action ensures that the battery maintains stable voltage without requiring extended stopping times, thereby maintaining continuous operation capability while ensuring voltage stability.
Solution Approach 2:
The patent changes the operational parameters by introducing a capacitor with specific capacitance value and voltage range (Vc1 to Vc2). The system operates by cycling the capacitor charge state rather than directly charging/discharging the battery during each travel segment. This parameter-based approach allows precise control of energy flow, enabling the AGV to maintain stable battery voltage while extending continuous operation time beyond what battery-only systems can achieve.
3Productivity
If the battery is charged repeatedly for short times during travel, then charging frequency is increased, but the battery still depletes gradually requiring replacement or external charging
Solution Approach 1:
The capacitor provides beforehand cushioning for the battery by absorbing the repeated charging cycles. Instead of subjecting the battery to frequent charge/discharge cycles during each travel segment, the capacitor handles these rapid energy exchanges. This protective mechanism cushions the battery from stress, extending its lifespan while allowing high-frequency charging operations to maintain voltage stability during continuous use.
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
This solution enables AGVs to operate continuously for extended periods without battery replacement, as the capacitor maintains a stable voltage during travel, preventing battery depletion and reducing operational interruptions.
Implementation Method 1
a power receiver, wirelessly receiving first electric power from the power transmitter, and outputting second electric power deriving from the first electric power
Data Source
AI summary
A vehicle system provided according to one aspect of the present disclosure includes a power transmitter and a vehicle. The power transmitter is placed at one of at least one charge position. The vehicle includes: a power receiver, a capacitor, and a motor. The power receiver wirelessly receives first electric power from the power transmitter, and outputs second electric power deriving from the first electric power. The capacitor stores the second electric power output by the power receiver such that the capacitor is charged from a first voltage Vc1 to a second voltage Vc2. The motor is driven by the second electric power from the capacitor. The vehicle automatically travels a distance Dx along a route from one to a next one of the at least one charge position on the route. The distance Dx satisfies a certain relationship.