Battery Cell Swelling Detection via Pressure Sensors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery cell swelling detection systems fail to effectively prevent accidents like ignition and explosion, as they only disconnect power when elements break, leading to potential re-ignition risks and inability to reuse batteries, and do not control peripheral devices to prevent unnecessary power consumption.
Innovation Solution
A system with pressure measuring sensors placed between battery cells in a battery pack to detect volume changes, controlling the power source supply and peripheral devices like fans and cooling valves to prevent swelling-related accidents and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure measuring sensors are installed between battery cells to detect swelling early, then safety against ignition and explosion is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The battery pack is divided into multiple modular units, each with its own pressure sensor and control circuitry. This segmentation allows distributed monitoring of swelling in each cell group, improving overall safety while keeping individual sensor units simple and manageable.
Solution Approach 2:
A microcontroller unit acts as an intermediary between the pressure sensors and the power management system. The microcontroller reads sensor data, processes swelling detection algorithms, and triggers appropriate responses, thereby simplifying the overall system architecture while maintaining high reliability.
2Reliability
If power supply is blocked immediately upon detecting swelling, then prevention of ignition and explosion is improved, but battery reusability through regeneration deteriorates
Solution Approach 1:
The system performs preliminary assessment of the swelling cause before blocking power supply. By analyzing pressure trends, temperature data, and cell voltage patterns, the system distinguishes between reversible swelling (allowing continued use) and dangerous swelling (triggering power block), thereby preserving battery reusability while ensuring safety.
Solution Approach 2:
The control system adjusts operational parameters dynamically based on swelling detection. Instead of immediate power cutoff, the system modifies charging current, discharge rate, or temperature thresholds to accommodate mild swelling, extending battery life while monitoring for worsening conditions that would trigger full power block.
3Loss of energy
If peripheral devices like fans and cooling valves are controlled to shut off when swelling is detected, then power consumption is reduced, but cooling effectiveness may deteriorate if swelling is misdiagnosed
Solution Approach 1:
The system implements closed-loop feedback control for peripheral devices. Pressure sensor data continuously monitors swelling status, and the control unit adjusts fan and cooling valve operation in real-time. If swelling reverses or stabilizes within safe parameters, cooling is automatically restored, ensuring both energy efficiency and thermal management reliability.
Solution Approach 2:
The control system dynamically adjusts the operational state of peripheral devices based on real-time swelling detection. Instead of static on/off control, the system modulates fan speed and valve opening degree according to the severity and trend of swelling, optimizing the balance between power consumption and cooling effectiveness.
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
Rapidly detects abnormal swelling, prevents battery life shortening and structural deformation, and avoids accidents like ignition and explosion by blocking power supply and shutting off unnecessary devices, thereby enhancing safety and reducing power consumption.
Implementation Method 1
pressure measuring sensors and measures a pressure applied to the pressure measuring sensor according to a change in volume of each of the one or more battery cells
Data Source
AI summary
The present invention relates to a system and a method of detecting swelling of a battery cell, which, when abnormal swelling is generated in a battery cell embedded in a battery pack, rapidly detect the abnormal swelling and control a supply of a power source to the battery pack to be blocked, thereby preventing a structural deformation of the battery cell and the battery pack and life shortening of the battery, and preventing an accident, such as ignition and explosion.