Battery Housing Structure for Expansion Detection Without Direct Pressure
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Solution Overview
Problem
Existing methods for detecting secondary battery expansion are not sufficiently effective, leading to potential electrolyte leakage and ignition risks due to direct pressure application on the battery.
Innovation Solution
A battery housing structure with a frame and lower casing that differentially deform to guide expansion towards a detection switch, preventing direct contact and allowing for more effective detection of battery expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If strain gauges are attached directly to the battery surface to detect expansion, then expansion detection is enabled, but excessive pressure is applied to the battery which may cause electrolyte leakage or ignition
Solution Approach 1:
A housing body is introduced as an intermediary between the strain gauges and the battery. The housing body deforms in response to battery expansion, transmitting this deformation to the strain gauges without requiring direct contact between the gauges and the battery surface, thereby eliminating excessive pressure application while maintaining detection capability
Solution Approach 2:
The housing body is designed with specific material properties and structural characteristics (different ease of deformation on different surfaces) that allow it to transform the battery's expansion into measurable strain on its own surface, changing the physical parameter being measured from direct battery surface strain to housing body strain
2Strength
If the housing body is made rigid to protect the battery, then protection is improved, but expansion detection sensitivity is reduced
Solution Approach 1:
The housing body exhibits different ease of deformation on its first main surface compared to its second main surface. The first surface is designed to be more easily deformable to enhance detection sensitivity, while the overall housing structure maintains sufficient rigidity to provide battery protection
Solution Approach 2:
The housing body is designed with dynamic deformation characteristics that allow it to flexibly respond to battery expansion forces while maintaining structural integrity. The differential ease of deformation enables the housing to adapt its rigidity based on the direction and magnitude of applied forces
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
The structure effectively detects battery expansion without applying excessive pressure, reducing the risk of electrolyte leakage and ignition by dispersing force through differential deformation, thus enhancing safety.
Implementation Method 1
the housing body has different ease of deformation with respect to expansion of the battery on a first main surface side of the battery and on a second main surface side of the battery
Data Source
AI summary
A battery housing structure capable of more effectively detecting expansion of a battery is provided.A battery housing structure according to the present invention includes a housing body of a battery, and the housing body has different ease of deformation with respect to expansion of the battery on a first main surface side of the battery and on a second main surface side of the battery.