Power Supply System Sweep Control for Battery Refreshing
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Solution Overview
Problem
Existing power supply systems with multiple modules, including batteries affected by the memory effect, face challenges in efficiently performing refreshing charging/discharging without disrupting normal operations.
Innovation Solution
A power supply system with a main line, sweep modules, and a control unit that sequentially switches battery modules connected to the main line, maintaining connection for modules needing refreshing while excluding others to perform refreshing charging/discharging without stopping normal operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If refreshing charging/discharging is performed on all batteries in the plurality of modules, then the memory effect is reduced, but the normal operation of the system must be stopped
Solution Approach 1:
The system divides the plurality of battery modules into two groups: a first group that continues normal charging/discharging operations and a second group that undergoes refreshing charging/discharging. This segmentation allows simultaneous execution of both normal operations and memory effect mitigation without mutual interference, resolving the contradiction between maintaining system productivity and improving battery reliability.
Solution Approach 2:
The control device dynamically switches between different operational modes for different battery modules based on their individual needs. Some modules operate in normal charging/discharging mode while others are switched to refreshing mode, allowing the system to adaptively balance between continuous operation and memory effect reduction.
2Ease of manufacture
If refreshing charging/discharging is performed on batteries not affected by memory effect, then all batteries are treated uniformly, but unnecessary refreshing operations are performed
Solution Approach 1:
The control device applies different control strategies to different battery modules based on their specific characteristics. Batteries affected by memory effect receive refreshing charging/discharging while batteries not affected by memory effect continue with normal operations. This localized differentiation eliminates unnecessary refreshing operations on batteries that don't require it, reducing energy waste while maintaining simple overall control logic.
Solution Approach 2:
The control device monitors the state of charge and operational characteristics of each battery module to determine which batteries require refreshing operations. This feedback mechanism enables intelligent differentiation between batteries affected by memory effect and those that are not, allowing the system to perform refreshing operations only when necessary and avoid energy waste on batteries that don't need it.
Data Source
AI summary
A power supply system includes a main line, a plurality of sweep modules, and a control unit. Each sweep module includes a battery module and a power circuit module. The power circuit module switches between connection and disconnection between the battery module and the main line. The control unit executes sweep control for sequentially switching the battery modules which are to be connected to the main line. The control unit maintains connection of a refreshing module which is to be subjected to refreshing charging/discharging to the main line while sweep control is being executed in a state in which the refreshing module is excluded in at least one of outputting of electric power to the outside and inputting of electric power from the outside.