Battery Swelling Sensing via Gas Detection
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Solution Overview
Problem
Existing battery swelling detection technologies fail to detect swelling phenomena at an early stage, leading to risks of ignition and explosion, and existing control methods are not effective in preventing accidents or optimizing battery operation.
Innovation Solution
A system with dispersed detecting units inside battery modules that monitor gas branched from battery cells, determining a level of detection values to control vehicle speed, charging current, and peripheral apparatus operations, thereby preventing accidents and optimizing battery performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure measuring means is used to detect battery swelling, then the detection can identify volume expansion, but the detection can only occur when swelling has considerably progressed, making early detection difficult
Solution Approach 1:
The patent places detecting units inside the battery module to detect gas branches before they accumulate to cause significant pressure buildup. This preliminary detection approach allows the system to identify swelling indicators early in the process, enabling preventive action before the swelling considerably progresses and pressure-based detection would become necessary.
Solution Approach 2:
The patent uses gas detection as an intermediary indicator of battery swelling. Instead of directly measuring pressure or volume changes that occur late in the swelling process, the detecting units monitor gas branches that are produced during early-stage swelling, providing an earlier and more sensitive detection mechanism.
2Reliability
If current is blocked to prevent swelling progression, then battery safety is improved, but the response occurs only after considerable swelling has already progressed
Solution Approach 1:
The control unit is configured to block current flow when gas detection values exceed predetermined thresholds, preventing swelling progression. By placing detecting units inside the battery module, the system performs preliminary detection of gas branches before they indicate severe swelling, enabling the control unit to take preventive action earlier and improve battery safety while reducing response time.
3Loss of time
If detecting units are dispersed inside battery modules, then early detection of gas branches is enabled, but device complexity increases
Solution Approach 1:
The patent divides the battery system into multiple modules, with detecting units dispersed inside each module. This segmentation allows each detecting unit to independently monitor its local environment for gas branches, enabling early detection without requiring a single complex centralized detection system. The modular approach distributes the detection function across multiple simple units rather than one complex unit.
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
Real-time detection of gas from battery cells allows for early intervention, reducing the risk of accidents, improving battery efficiency, and minimizing power consumption by controlling vehicle speed and peripheral apparatus operations.
Implementation Method 1
each detecting unit being configured to detect gas branched from a battery cell of the corresponding battery module
Data Source
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AI summary
The present invention relates to a system for detecting swelling of a battery, the system including: a plurality of detecting units which is provided at one or more battery modules of a battery pack, respectively, and detects gas branched from a battery cell of the battery module; a control unit which selects the largest detection value among the detection values of the respective detecting units, determines a level of the selected detection value according to a size of the selected detection value, and controls an operation of a peripheral apparatus based on the corresponding level; and a switch unit which is provided in a connection path of the battery pack and an external power source and is turned on and off according to a signal of the control unit.