Battery Control System Singular Point Capacity Detection
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Solution Overview
Problem
Conventional power supply systems fail to adequately control the charge/discharge capacity of secondary batteries to prevent deterioration, leading to potential deviations in electrode potentials, which can cause decomposition of the electrolytic solution and further deterioration, and they often require additional components like reference electrodes, increasing cost and complexity.
Innovation Solution
A power supply system with a control section that detects singular point capacities by measuring changes in output voltage and calculates new upper and lower limit values for the battery capacity based on these detections to maintain electrode potentials within a predetermined range, using a detection section and calculation setting section to adjust charging/discharging operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional power supply systems control battery charging/discharging, then basic power management is achieved, but electrode potential deviations occur during deterioration leading to electrolyte decomposition
Solution Approach 1:
The system performs preliminary detection of singular point capacity shifts before they cause harmful electrode potential deviations. By monitoring changes in the singular point capacity during battery deterioration, the control section can proactively adjust capacity limits to prevent electrolyte decomposition and maintain reliable battery operation.
Solution Approach 2:
The control section uses feedback from singular point capacity detection to dynamically adjust the upper and lower limit values of battery capacity. This closed-loop control ensures that electrode potentials remain within safe ranges even as the battery deteriorates, preventing harmful effects while maintaining stable performance.
2Measurement precision
If additional reference electrodes are added to monitor battery state, then measurement precision improves, but device complexity and cost increase
Solution Approach 1:
The battery system uses its own inherent electrical characteristics (output voltage changes during charging/discharging) to detect singular point capacity shifts. This self-service approach eliminates the need for external reference electrodes or additional sensing components, maintaining high measurement precision while avoiding increased device complexity.
Solution Approach 2:
The system monitors changes in the battery's output voltage parameter during normal operation to detect singular point capacity shifts. By utilizing existing electrical parameters rather than adding new sensors, the system achieves precise battery state monitoring without increasing the number of components or system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively prevents the progression of battery deterioration by setting optimal capacity limits based on detected singular point capacities, maintaining electrode potentials within a safe range and enhancing the battery's usable capacity and input/output performance without the need for additional electrodes or increased complexity.
Implementation Method 1
measuring a change in the output voltage
Implementation Method 2
metal atoms being detached from/inserted into the active material
Data Source
AI summary
A secondary battery and a control section are included. An electrode of the secondary battery has a singular point at which a variation in an output voltage with respect to a capacity is singularly changed. The control section includes a detection section and a calculation setting section. The detection section changes the capacity of the secondary battery, and detects a singular point capacity which is the capacity at which the singular point appears. When the secondary battery is deteriorated, the calculation setting section calculates and sets at least one of an upper limit value and a lower limit value of the capacity by using a detection value of the singular point capacity after the deterioration so that a potential of the electrode does not deviate from a predetermined range.