Power Management Apparatus Charging Source Identification
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Solution Overview
Problem
The challenge is to determine and manage the charging power supply used for charging storage battery systems, particularly when reverse power flow occurs, as existing methods fail to specify the type of charging power supply effectively.
Innovation Solution
A power management method and apparatus that identify and monitor the storage capacity of storage battery systems, limiting charging when using a second charging power supply different from the first until the capacity reaches a predetermined threshold, thereby specifying the charging power supply used for charging power backfed from the storage battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the charging power supply type is determined by reverse power flow value, then the power backfed from storage battery can be controlled, but the charging power supply used for charging cannot be specified
Solution Approach 1:
The system establishes a feedback mechanism where the power management apparatus monitors both the charging state of the storage battery and the type of charging power supply being used. This feedback loop enables the apparatus to identify which charging power supply (first or second) is currently charging the storage battery, and subsequently control the reverse power flow based on this identified information, thereby resolving the information loss problem.
2Adaptability or versatility
If charging from second charging power supply is allowed freely, then charging flexibility is improved, but mixing of power supplies causes inability to specify charging source
Solution Approach 1:
The charging power supplies are segmented into distinct types (first charging power supply and second charging power supply). The power management apparatus identifies which segment is currently charging the storage battery and controls reverse power flow accordingly. This segmentation allows multiple power supplies to be used flexibly while maintaining clear identification of the charging source.
3Loss of information
If monitoring of storage capacity is added to identify charging power supply, then charging source specification is improved, but system complexity increases
Solution Approach 1:
The power management apparatus performs multiple functions using the same monitoring mechanism: it monitors storage capacity to determine when reverse power flow should occur, and simultaneously uses this information to identify which charging power supply is being used. This multi-functionality reduces system complexity while achieving charging source specification.
Data Source
AI summary
A power management method comprises a step A of specifying a charging power supply used for charging of a storage battery apparatus, a step B of monitoring a storage capacity of the storage battery apparatus, and a step C of limiting, until the storage capacity becomes a predetermined threshold or less, the charging of the storage battery apparatus which uses a second charging power supply different from a first charging power supply when the charging power supply is the first charging power supply.