Battery Can Sensor Unit With Elastic Resin Fixation
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Solution Overview
Problem
Existing sensor units for battery manufacturing facilities face issues with detection accuracy due to eccentricity and insecure fixation of components, caused by friction between O rings and the casing, leading to difficulty in specifying abnormal locations and affecting yield, quality, and productivity.
Innovation Solution
A sensor unit with a first component attached to a casing and second components made of resin, featuring elastic portions that press against the casing's inner surface, preventing eccentricity and securely fixing the first component, thereby enhancing detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an O ring is used to hold the core component in the casing, then the core component can be constrained, but friction between the O ring and the casing causes pinching and eccentricity, decreasing detection accuracy
Solution Approach 1:
The patent extracts the O ring from the system and replaces it with a core component that has an integrated elastic portion. This eliminates the friction and pinching problems caused by the O ring while maintaining the constraint function. The elastic portion is formed as an integral part of the core component, allowing it to press against the casing inner circumferential surface without causing eccentricity.
Solution Approach 2:
The patent uses a composite structure where the core component includes both a rigid portion (for structural support) and an elastic portion (for constraint). The elastic portion is made of a material with appropriate elasticity to press against the casing while the rigid portion provides the necessary structural integrity. This composite approach allows the core component to perform multiple functions simultaneously.
2Ease of manufacture
If the core component is inserted into the casing with an O ring, then the sensor unit can be assembled, but the O ring may pinch and fail to securely fix the core component
Solution Approach 1:
The patent removes the O ring from the assembly process and integrates the elastic portion directly into the core component. This simplifies the assembly process while ensuring reliable fixation. The elastic portion is formed as an integral part of the core component, eliminating the need for separate sealing elements and reducing the risk of pinching during insertion.
3Force
If friction between the O ring and casing is high, then the O ring can provide constraint, but it causes pinching and eccentricity of the core component
Solution Approach 1:
The patent employs a composite structure where the core component includes a dedicated elastic portion made of a material with appropriate elasticity. This elastic portion provides the necessary constraint force while maintaining stability. The elastic portion is designed to press against the casing inner circumferential surface with controlled force, preventing eccentricity while providing adequate constraint.
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 sensor unit accurately and quickly identifies abnormal locations in the facility, reducing inspection workload and improving yield, quality, and productivity by securely fixing the first component and preventing eccentricity.
Implementation Method 1
an elastic portion (58) that is elastically pressed against an inner circumferential surface of the casing
Data Source
AI summary
A sensor unit (10) is loaded into battery production equipment and comprises a bottomed cylindrical case (11) that is processed similarly to a battery outer can by the battery production equipment, and a sensor that detects a force acting on the case from the battery production equipment. The sensor unit further comprises a first component (20) to which the sensor is attached and which is accommodated inside the case, and at least one second component (50) made of resin, the second component (50) being disposed so as to engage with the outside of the first component. The second component comprises an elastic part that is elastically pressed against the inner circumferential surface of the case, and a hollow section formed inside of the elastic part.