Battery Current Burden Control Under Internal Short-Circuit States
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Solution Overview
Problem
Existing battery control methods fail to maintain a stable state when an internal short circuit occurs, leading to potential thermal runaway and safety issues such as explosions.
Innovation Solution
A processor-implemented method that determines internal short circuit resistance values and states in batteries, performing control processes to reduce current burden, isolate batteries, and manage charging and discharging to prevent further damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If battery control methods are used to detect short circuits, then safety issues can be improved, but the system cannot maintain stable state when internal short circuit occurs
Solution Approach 1:
The patent implements dynamic control of battery current based on detected short circuit states. The system continuously monitors battery parameters and adjusts charging/discharging current in real-time according to the detected short circuit severity, transitioning between different operational states (normal operation, current limitation, and isolation) to maintain system stability while responding to changing conditions
Solution Approach 2:
The system employs feedback control by continuously detecting battery short circuit states through monitoring voltage, current, and temperature parameters. The detection results feed back to the control unit which adjusts the battery current accordingly, creating a closed-loop control system that adapts to short circuit conditions and maintains stability through iterative adjustment
2Reliability
If current burden is reduced to prevent thermal runaway, then safety is improved, but charging efficiency decreases
Solution Approach 1:
The patent dynamically changes current parameters based on detected short circuit states. When no short circuit is detected, normal charging current is applied for efficient charging. When short circuits are detected, the system adjusts current magnitude and characteristics according to the severity level, optimizing the balance between safety and charging efficiency through parameter adaptation rather than fixed current limitation
3Measurement precision
If internal short circuit resistance is monitored, then detection accuracy is improved, but measurement complexity increases
Solution Approach 1:
The system uses a multi-functional monitoring approach where the same sensing infrastructure measures multiple battery parameters (voltage, current, temperature) that collectively indicate short circuit conditions. This universal measurement system achieves accurate short circuit detection without requiring dedicated specialized sensors, reducing overall system complexity while maintaining high detection precision
Data Source
AI summary
A method including determining a first internal short circuit resistance value of a first battery based on the sensor data, determining a first internal short circuit state of the first battery using the first internal short circuit resistance value, and performing a first control process of reducing a current of the first battery, for alleviating a current burden of the first battery, in response to the determined first internal short circuit state being a first state other than a predetermined normal state.