Battery Cell Management via Threshold-Based Charging Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Information handling systems face challenges in safely managing battery cells, particularly in preventing internal short circuits that can lead to thermal runaway, posing safety hazards due to variations in voltage, temperature, and internal resistance, which existing technologies fail to address effectively.
Innovation Solution
A battery management system (BMS) that monitors attributes like voltage, internal resistance, and temperature, using temporary and permanent failure modes to prevent charging and discharging of battery cells when thresholds are exceeded, and employs switches to control power flow, thereby mitigating safety hazards by terminating charging processes and reducing state of charge when unsafe conditions are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the BMS strictly enforces safety thresholds for temperature, voltage, and internal resistance, then safety against thermal runaway is improved, but charging and discharging operations are restricted
Solution Approach 1:
The BMS performs preliminary measurements of temperature, voltage, and internal resistance before allowing charging or discharging operations. By proactively identifying cells that exceed safety thresholds through pre-charge/discharge monitoring, the system prevents unsafe operations before they occur, thereby maintaining safety without unnecessarily restricting productive operations.
Solution Approach 2:
The system continuously monitors battery cell parameters and provides real-time feedback to control charging and discharging operations. When a cell's temperature, voltage, or internal resistance exceeds predefined thresholds, the BMS immediately adjusts or terminates the charging/discharging process for that specific cell, enabling dynamic safety management that preserves operational productivity when conditions are safe.
2Measurement precision
If the BMS monitors and controls each battery cell individually, then detection precision of unsafe conditions is improved, but system complexity increases
Solution Approach 1:
The BMS divides the battery system into individual cell-level monitoring units, with each unit independently measuring temperature, voltage, and internal resistance for its assigned cell. This segmentation enables precise detection of unsafe conditions in specific cells without requiring complex centralized control, as each segment operates with dedicated sensing and control logic.
Solution Approach 2:
The BMS employs a universal control architecture that handles multiple functions (temperature monitoring, voltage measurement, internal resistance calculation, and charging/discharging control) through integrated circuitry and algorithms. This multi-functional design reduces overall system complexity by consolidating control logic rather than requiring separate dedicated systems for each monitoring and control function.
3Object-affected harmful factors
If the BMS prevents charging and discharging when thresholds are exceeded, then safety hazards are reduced, but operational time is lost
Solution Approach 1:
The BMS continuously monitors temperature, voltage, and internal resistance parameters before unsafe conditions develop into critical hazards. By detecting early signs of threshold violations and preemptively adjusting charging/discharging rates or terminating operations, the system prevents safety hazards before they occur while minimizing operational disruption through early intervention rather than reactive shutdowns.
Solution Approach 2:
The BMS dynamically adjusts charging and discharging operations based on real-time battery cell conditions. When parameters approach but do not exceed thresholds, the system modulates operation rates to maintain safety margins, allowing continued operation at reduced capacity. Only when thresholds are actually exceeded does the system terminate operations, thereby reducing unnecessary time loss while maintaining safety.
Data Source
AI summary
In one or more embodiments, one or more systems, methods, and/or processes may determine that a timeout value has been reached; for each battery cell of multiple of battery cells: may determine if a temperature value associated with the battery cell meets or exceeds a threshold temperature value; if the temperature value associated with the battery cell does not meet or exceed the threshold temperature value, may permit the battery cell to be charged and discharged; if the temperature value associated with the battery cell meets or exceeds the threshold temperature value: may increment a temporary fail count associated with the battery cell; and may prevent at least one of charging and discharging the battery cell; may determine if temporary fail count exceeds a temporary fail count threshold; and if the temporary fail count does not exceed the temporary fail count threshold, may permit charging and discharging the battery cell.