Battery Pack Management Apparatus Cycle-Based Cell Isolation
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Solution Overview
Problem
The life of battery packs used in power storage applications, such as smart grid systems and electric vehicle charging stations, is reduced due to repeated charging and discharging cycles, leading to performance degradation and difficulty in maintaining or replacing individual battery cells in large packs.
Innovation Solution
A battery pack management apparatus that measures the number of charging and discharging cycles of each cell, selects cells reaching a reference number, and stops their operations for a specified time, with optional speed reduction during resumption to prolong cell life without material replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If battery cells are repeatedly charged and discharged to meet power storage demands, then power supply flexibility and responsiveness are improved, but the life of battery cells deteriorates due to internal material degradation
Solution Approach 1:
The management apparatus performs preliminary actions by measuring the number of charging and discharging cycles of each battery cell in advance, and proactively stops operations of cells that have reached a reference number before they fail, thereby preventing degradation while maintaining power supply flexibility
Solution Approach 2:
The system implements feedback control by continuously monitoring the charging and discharging cycle counts of individual battery cells, comparing them against reference values, and automatically adjusting operations by stopping cells that approach their lifecycle limits, thus resolving the contradiction between usage intensity and cell longevity
2Reliability
If individual battery cells are stopped for maintenance or replacement, then the life of those cells is extended, but the overall power storage capacity and productivity of the battery pack decreases
Solution Approach 1:
The battery pack is treated as a segmented system where individual battery cells can be independently monitored and controlled. The management apparatus identifies and stops only the specific cells that have reached their cycle reference number, while allowing other cells to continue operating, thus maintaining overall power storage capacity while extending the life of individual cells
Solution Approach 2:
Different treatment is applied to different battery cells based on their individual usage conditions. Cells that have reached the reference cycle number are stopped for maintenance, while other cells continue normal operations, creating a localized quality control approach that balances cell life extension with maintained productivity
3Quantity of substance
If the number of battery cells in a pack is increased to meet higher power storage demands, then the total capacity and energy storage capability are improved, but the difficulty of monitoring and managing individual cell states increases
Solution Approach 1:
Each battery cell effectively monitors its own charging and discharging cycle count through the management apparatus, which automatically tracks and reports the operational status of individual cells. This self-service approach allows the system to manage a large number of cells without proportionally increasing management complexity, as each cell's status is independently tracked and reported
Data Source
AI summary
Provided is a battery pack management apparatus that effectively improves the life of a battery pack. The battery pack management apparatus is an apparatus for managing a battery pack, in which a plurality of battery cells are electrically connected to each other, and includes: a measurement unit configured to measure the number of charging and discharging cycles of each of the plurality of battery cells; a selection unit configured to select at least some battery cells from among battery cells whose number of charging and discharging cycles measured by the measurement unit reached a reference number; and a blocking unit configured to stop operations of the at least some battery cells selected by the selection unit for a first reference time.