Double-Layer Capacitor Energy Storage for AGV Operation Time
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Solution Overview
Problem
Existing driverless, mobile assembly and material transport units in industrial settings face challenges with battery-powered systems that require frequent recharging, leading to downtime and inefficiencies, especially when high-capacity batteries are needed for long operation periods without continuous power supply.
Innovation Solution
The integration of a double-layer capacitor device as a secondary energy storage system that can be quickly charged, allowing it to provide drive energy and maintain or recharge the primary battery, enabling continuous operation with reduced battery volume and weight, and using DC/DC converters to manage energy efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If high-capacity batteries are used to extend operation time, then duration of action is improved, but weight of moving object worsens
Solution Approach 1:
The energy storage system is segmented into two distinct components: a high-capacity battery for long-term energy storage and a double-layer capacitor for rapid energy delivery. This segmentation allows each component to be optimized for its specific function, enabling the battery to be smaller and lighter while still achieving extended operation time through coordinated operation with the capacitor.
Solution Approach 2:
The system dynamically switches between battery and capacitor based on power demands. The control unit monitors energy requirements and automatically transitions between power sources, using the capacitor for high-power instantaneous demands and the battery for sustained lower-power operation, thereby optimizing the weight-duration tradeoff.
2Duration of action of moving object
If high-capacity batteries are used to extend operation time, then duration of action is improved, but volume of moving object worsens
Solution Approach 1:
The energy storage system is segmented into two distinct components: a high-capacity battery for long-term energy storage and a double-layer capacitor for rapid energy delivery. This segmentation allows each component to be optimized for its specific function, enabling the battery to be smaller and lighter while still achieving extended operation time through coordinated operation with the capacitor.
Solution Approach 2:
The system changes the electrical parameters dynamically by switching between voltage and current sources. The capacitor provides high-current pulses when needed, while the battery maintains steady-voltage operation, allowing the battery to be downsized while still meeting overall energy requirements through parameter optimization.
3Reliability
If frequent recharging is implemented to maintain operation, then reliability is improved, but loss of time worsens
Solution Approach 1:
The system implements periodic energy top-up cycles where the double-layer capacitor is rapidly recharged from the battery or external sources during scheduled intervals. This periodic action maintains the capacitor in a ready state for immediate high-power delivery, ensuring continuous reliable operation while minimizing total downtime through efficient periodic recharging.
Solution Approach 2:
The system performs self-service energy management by automatically monitoring charge levels and initiating recharging operations when needed. The control unit manages the energy flow between battery and capacitor, and can autonomously connect to charging infrastructure, reducing manual intervention time and maintaining continuous operation.
4Ease of operation
If double-layer capacitors are used for quick charging, then ease of operation is improved, but device complexity worsens
Solution Approach 1:
The double-layer capacitor serves multiple functions: it provides rapid energy delivery for high-power demands, acts as a buffer to protect the battery from high current stresses, and can be independently recharged during brief intervals. This multi-functionality justifies the added complexity by delivering tangible operational benefits across multiple system requirements.
Solution Approach 2:
The double-layer capacitor acts as an intermediary energy storage device between the battery and the drive device. It mediates the energy transfer by absorbing high-current demands and releasing them smoothly, protecting the battery while providing the necessary power bursts, thereby simplifying the overall control architecture despite adding a component.
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 configuration allows for extended use times with reduced battery size and weight, enabling continuous operation and efficient energy management, with the double-layer capacitors capable of withstanding high charge cycles and providing reliable energy supply through quick charging at stations.
Implementation Method 1
a second energy storage device which is in the form of a device which can be charged quickly, in particular a double-layer capacitor device
Implementation Method 2
a first energy storage device which is in the form of a battery device
Data Source
AI summary
A method for operating a driverless, mobile assembly and/or material transport unit as a driverless transport system (DTS) with fixed assembly and/or warehousing stations. In this method, a system control device is used for the entire assembly process. The driverless, mobile assembly and/or material transport units comprises a travel device for the traveling movement of the unit, a drive device for the travel device, an energy storage device for providing the energy for the drive device and a control device for controlling the traveling movement in coordination with the system control device.