Crane Multi-Source Charging for Low-Emission Off-Grid Operation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Construction and/or material handling machines face challenges in achieving CO2-free and energy self-sufficient operations at construction sites without sufficient power grid, leading to increased noise pollution and emissions due to reliance on diesel power units.
Innovation Solution
An intelligent charging structure with multiple charging interfaces allows the energy store to be connected to various power supplies, including internal generators and external power sources, enabling efficient energy management and reducing noise and emissions by optimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a diesel power unit is used to generate power at construction sites without sufficient power grid, then the machine can operate independently, but CO2 emissions and noise pollution increase
Solution Approach 1:
The power generation function is segmented into multiple independent energy storage modules (battery packs) that can be charged from various sources. Each module can operate independently or in combination, allowing the system to switch between different power sources based on availability and environmental requirements.
Solution Approach 2:
The charging device is designed with multiple charging interfaces that can accept power from different sources (external power supply, internal combustion engine generator, recuperative power harvesting). This multi-functional charging system enables the machine to adapt to different construction site conditions while maintaining emission-free operation when possible.
2Object-generated harmful factors
If an electric energy storage system is used to cushion load peaks, then CO2-free operation is achieved, but the system complexity increases
Solution Approach 1:
The system dynamically manages power flow between multiple energy storage modules and power sources based on real-time conditions. The control system automatically adjusts charging and discharging operations to optimize performance while simplifying user interaction through automated decision-making algorithms.
Solution Approach 2:
The charging device automatically selects and manages different power sources without requiring manual intervention. The system self-regulates power distribution, monitors charge states, and manages multiple interfaces autonomously, reducing operational complexity despite the multi-component architecture.
3Adaptability or versatility
If multiple charging interfaces are provided for various power supplies, then adaptability to different construction sites is improved, but the charging device complexity increases
Solution Approach 1:
The charging device integrates multiple charging interfaces (first, second, and third charging interfaces) that support different power sources including external power supplies, internal combustion engine generators, and recuperative power harvesting systems. Each interface is designed to handle specific power sources while the overall system manages them through a unified control architecture.
Solution Approach 2:
The control device acts as an intermediary that manages power flow between multiple charging interfaces and the energy storage system. It coordinates charging operations from different sources, monitors system state, and makes automated decisions to optimize power utilization while shielding the user from the underlying complexity.
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
The solution enables CO2-free and low-emission operation by efficiently utilizing available power sources, minimizing noise pollution, and ensuring uninterrupted machine operation through intelligent charging strategies.
Implementation Method 1
an electric energy store (10) for supplying the electric drives (7) with power
Implementation Method 2
at least one further charging interface (12b) for charging the energy store (10) from the machine-integrated generator (13)
Implementation Method 3
The charge control device (16) is configured to operate the internal combustion engine (15) for a limited time in a rated power range or in a limited window around the rated power range
Data Source
AI summary
The present invention comprises an electrified construction and/or material handling machine, in particular a crane, with electric drives for driving working assemblies, an electric energy store for supplying the electric drives with power, and a charging device for recharging the energy store, wherein the charging device has various charging interfaces for charging the energy store from various power supplies comprising at least one machine-integrated power generator and an external power supply.