Power Storage Charging Control to Avoid Full-Charge Power Drop
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Solution Overview
Problem
In energy management systems using power storage devices on battery electric vehicles, the maximum charging power decreases when any power storage device becomes fully charged, potentially leading to insufficient charging for energy management requirements.
Innovation Solution
An energy management method that determines if the current time is within a target period and reselects power storage devices to prevent full charging, prioritizing those with earlier charging time limits or lower remaining power storage amounts, ensuring that none are fully charged within the target period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power storage devices are charged simultaneously to execute energy management with greater charging power, then charging power increases, but maximum charging power decreases when any power storage device becomes fully charged
Solution Approach 1:
The patent dynamically reselects the target resource (power storage device) for charging based on real-time charging status. When a power storage device reaches full charge, the system switches to another device as the target resource, maintaining continuous charging capability. This dynamic adjustment resolves the contradiction by preventing the system from being constrained by a single fully-charged device, thereby preserving both high charging power and reliability.
Solution Approach 2:
The patent temporarily discards the fully-charged power storage device from the charging target list and recovers charging capability by selecting alternative devices. This allows the system to continue operating at high charging power levels by rotating through multiple devices, ensuring that at least one device remains available for charging at any given time.
2Reliability
If target resource is reselected to suppress full charging of power storage devices, then maximum charging power is maintained, but remaining power storage amounts may not reach target values by scheduled departure times
Solution Approach 1:
The patent incorporates feedback mechanisms that monitor both the charging status and scheduled departure times of vehicles. The system uses this feedback to intelligently adjust target resource selection, balancing the need to maintain maximum charging power with the requirement to ensure sufficient charge by departure times. This feedback loop resolves the contradiction by making informed decisions about which devices to charge based on real-time conditions.
Solution Approach 2:
The patent performs preliminary actions by pre-calculating charging requirements based on scheduled departure times before executing the charging process. This allows the system to plan charging sequences that both maintain maximum charging power and ensure vehicles are adequately charged by their departure times, resolving the contradiction through advance preparation.
3Productivity
If power storage devices are charged to reach target charging amount, then energy management efficiency improves, but charging capacity becomes insufficient for continued energy management
Solution Approach 1:
The patent ensures continuity of useful action by continuously maintaining at least one power storage device in a chargeable state through dynamic target resource reselection. This prevents interruptions in energy management operations and ensures that charging capacity remains sufficient while maintaining high energy management efficiency. The system continuously rotates through multiple devices to prevent any single device from reaching full charge and blocking further charging operations.
Data Source
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AI summary
An energy management method includes determining whether a current time is within a target period (S1 1), and executing energy management within the target period by a target resource selected from among a plurality of power storage devices (S12 to S15). The executing the energy management includes charging the target resource to execute the energy management within the target period, and reselecting the target resource from among the power storage devices for suppression of a state in which each of the power storage devices reaches a target charging amount within the target period.