Dynamic Load Shedding Order for Vehicle Electrical Power
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Solution Overview
Problem
Current electrical energy management in motor vehicles is inefficient, leading to suboptimal generator usage and user dissatisfaction due to fixed load shedding orders that prioritize certain comfort functions over others, resulting in unsuitable energy allocation and potential perception of equipment failure.
Innovation Solution
A dynamic electrical power supply management method that adjusts the activation rate of electrical equipment based on the state of charge and temperature of energy storage devices, implementing a dynamic load shedding order that evolves with equipment requests to balance energy allocation and ensure equal activation times, prioritizing generator supply over equipment energy allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a fixed load shedding order is used to manage electrical power supply, then the generator usage is optimized and energy cost is reduced, but the activation of certain comfort functions becomes unbalanced and users may perceive equipment failure
Solution Approach 1:
The patent applies dynamics by making the load shedding order variable rather than fixed. The system dynamically adjusts the priority order of electrical equipment based on accumulated activation time, ensuring that equipment which has been activated less frequently receives higher priority during load shedding events. This dynamic adaptation resolves the contradiction by maintaining energy optimization while ensuring balanced and equitable activation across all comfort functions.
Solution Approach 2:
The system implements feedback by continuously monitoring the accumulated activation time of each electrical equipment and using this information to adjust the load shedding order. This feedback mechanism ensures that equipment with lower activation history is prioritized, preventing user perception of equipment failure while maintaining overall energy efficiency. The feedback loop creates a self-regulating system that balances energy management with equipment availability.
2Device complexity
If certain comfort functions are prioritized in the load shedding order, then energy management is simplified, but other comfort functions are activated much less often leading to user dissatisfaction
Solution Approach 1:
The system applies self-service by automatically adjusting the load shedding order based on accumulated activation time data without requiring manual intervention. The electrical equipment itself 'services' its own priority status through the feedback mechanism, which automatically promotes equipment with lower activation history to higher priority positions. This self-adjusting mechanism maintains simplicity while ensuring equitable equipment availability.
3Power
If the generator is used to its maximum potential continuously, then energy supply is maximized, but the state of charge of energy storage devices may become insufficient during high demand periods
Solution Approach 1:
The system applies preliminary action by proactively managing the state of charge of energy storage devices before critical low-charge conditions occur. By monitoring SOC levels and anticipating future energy demands, the system can pre-charge storage devices when generator capacity allows, ensuring sufficient energy availability during high-demand periods. This preventive approach balances maximum power utilization with maintaining adequate energy reserves.
Data Source
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AI summary
The invention relates to a method for managing the supply of electrical power to the electrical equipment (EEI,...EE4) of a motor vehicle by means of dynamic supply based on at least one state of charge (SOC) of the unit(s) (1) for storing electrical energy, if necessary by means of, selectively and variably in time, shedding the loads of at least some of the biased electrical equipment (EEI...EE4), wherein the activation rate of the electrical equipment (EEI...EE4) is determined by establishing a dynamic load-shedding order that changes on the basis of the preceding biased states of the various electrical equipment (EEI...EE4) so as to cause the activation times of the biased electrical equipment (EEI...EE4) to converge toward a single time and/or to allocate the same amount of energy to each piece of equipment.