Secondary Battery Washer with Transparent Cover and Plug Hole
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Solution Overview
Problem
Conventional secondary battery manufacturing is inefficient due to the difficulty in locating the electrolyte injection hole and safety vent under the washer, which is opaque and symmetrical, and the washer tends to loosen on the cap plate due to the plug protrusion, causing assembly challenges.
Innovation Solution
A secondary battery design featuring a transparent resin cover for the safety vent hole and a plug hole in the washer to expose the safety vent and electrolyte injection hole positions, with support members to maintain the washer's horizontal alignment and prevent loosening, ensuring secure assembly and easy identification of components during fabrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the washer is made from opaque material with symmetrical structure, then the washer can provide insulation and prevent short-circuit, but it becomes difficult to locate the position of the electrolyte injection hole and safety vent during fabrication
Solution Approach 1:
The washer is made transparent or translucent instead of opaque, allowing workers to visually locate the electrolyte injection hole and safety vent positions through the washer material during fabrication, while still maintaining its insulation function
Solution Approach 2:
The washer is designed with an asymmetric structure where the opening is positioned offset from the center, corresponding to the specific locations of the electrolyte injection hole and safety vent, making these features visible and locatable through the transparent material
2Ease of manufacture
If the washer is made opaque and symmetrical, then the manufacturing process is simple, but the worker must raise the washer to check component positions, reducing welding efficiency
Solution Approach 1:
The transparent or translucent material allows visual inspection of component positions without disassembling the washer, eliminating the need to raise or remove the washer during welding operations, thus maintaining manufacturing simplicity while improving welding efficiency
3Reliability
If the plug protrudes from the cap plate to seal the electrolyte injection hole, then the sealing function is achieved, but the washer may loosen on the cap plate due to the protrusion part
Solution Approach 1:
The plug is designed to fit within a recess or cavity in the cap plate rather than protruding outward, or the washer is designed with a corresponding recess that accommodates the plug, allowing the plug to be nested within the structure without causing the washer to loosen
Data Source
AI summary
A secondary battery including a can for receiving an electrolyte and an electrode assembly including first and second electrode plates and a cap assembly including a cap plate covering an upper portion of the can. An electrode terminal connected to one of the first and second electrode plates is inserted into a center portion of the cap plate. A safety vent is formed at a first side of the cap plate and an electrode lead wire is connected to an upper surface of the electrode terminal to connect the electrode terminal to an external terminal. A washer is installed on an upper surface of the cap assembly in order to insulate the cap plate from the electrode lead wire and has an exposure part for exposing the safety part allowing the location of the safety vent to be noted without disassembly of the secondary battery.