Soil Compactor Power Control for Battery Overload Prevention
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Solution Overview
Problem
The operating time of electric motor-driven soil processing machines is limited by the energy stored in batteries, which can be overloaded due to high current demand from multiple consumers, potentially causing damage.
Innovation Solution
A method to detect excessive load on the energy store and deactivate or reduce power consumption of consumers strategically, prioritizing those with higher power consumption first to avoid overload and ensure efficient energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple consumers of electrical energy are operated simultaneously in a soil processing machine, then the functionality and operational capability of the machine is improved, but the energy store becomes overloaded due to excessive current demand
Solution Approach 1:
The control unit detects the load state of the energy store before operating consumers and prioritizes their activation. High-priority consumers are activated first, and low-priority consumers are activated only if sufficient energy capacity remains. This preliminary assessment and sequential activation prevents overload while maintaining operational capability.
Solution Approach 2:
Consumers of electrical energy are segmented into different priority groups (high-priority and low-priority). This segmentation allows the system to manage energy distribution hierarchically, ensuring critical functions receive power first while non-critical functions are activated only when energy availability permits, thus preventing overload.
2Reliability
If the power consumption of consumers is reduced or deactivation is implemented to avoid overload, then the reliability of the energy store is improved, but the productivity and operational efficiency of the soil processing machine deteriorates
Solution Approach 1:
The system dynamically adjusts the operational status of consumers based on real-time energy store load state. The control unit continuously monitors energy availability and adaptively activates or deactivates consumers according to priority levels and current energy capacity, optimizing both reliability and productivity under varying conditions.
Solution Approach 2:
The control unit detects the load state of the energy store and uses this feedback information to make real-time decisions about consumer activation. When energy capacity is sufficient, more consumers are activated to maintain productivity; when capacity is low, low-priority consumers are deactivated to protect the energy store, thus balancing reliability and productivity.
3Reliability
If consumers are activated with time delay to prevent excessive load, then the energy store overload is avoided, but the response time and operational readiness of the machine is reduced
Solution Approach 1:
The system performs preliminary detection of the energy store's load state before activating consumers. Based on this preliminary assessment, the control unit determines which consumers can be immediately activated and which require delay, enabling proactive load management that minimizes time loss while preventing overload.
Data Source
AI summary
In a method for operating a soil-working machine, in particular a soil compactor, wherein the soil-working machine (10) comprises a plurality of consumers of electrical energy fed from an energy store (58), a load state of the energy store (58) is registered and when the presence of a state of excessive load of the energy store (58) is detected, at least one consumer of electrical energy is deactivated and/or the power consumption of at least one consumer of electrical energy is reduced, and/or consumers of electrical energy are put into operation with a time offset in order to avoid entering a state of excessive load of the energy store (58).