Battery Terminal-Post Sealing Ring Structure Against Dislocation
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Solution Overview
Problem
The sealing ring in battery terminal-post assemblies is prone to dislocation or overturning during injection molding or processing, leading to poor airtightness and potential battery leakage, compromising safety performance.
Innovation Solution
A terminal-post assembly with a sealing ring featuring multiple first limiting structures spaced apart in the circumferential direction, providing uniform limiting and supporting forces to reduce dislocation and overturning, and an end cover assembly design that ensures tight fitting through interference fit and injection molding to enhance sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing ring is used in the terminal-post assembly, then sealing performance is improved, but the sealing ring is prone to dislocation or overturning during injection molding or processing
Solution Approach 1:
The sealing ring is divided into multiple segments with limiting structures that can independently engage with corresponding features on the terminal post. This segmentation allows each segment to maintain its position while accommodating dimensional variations, preventing dislocation and overturning during injection molding and processing operations.
Solution Approach 2:
The sealing ring incorporates limiting structures at specific locations that provide localized engagement points with the terminal post. These localized features create precise positioning zones that maintain sealing ring stability during processing while allowing the rest of the sealing surface to conform to variations in the terminal post geometry.
2Ease of manufacture
If the sealing ring is made loose fitting to accommodate dimensional variations, then ease of assembly is improved, but sealing performance deteriorates due to potential dislocation
Solution Approach 1:
The segmented design with limiting structures allows the sealing ring to be assembled easily while maintaining precise positioning. The limiting structures engage with corresponding features on the terminal post to prevent dislocation, ensuring sealing performance is maintained even with dimensional variations in the components.
Solution Approach 2:
The limiting structures are designed with specific dimensional parameters that allow for controlled movement and adjustment during assembly, while maintaining engagement forces sufficient to prevent dislocation during operation. This parameter optimization balances assembly ease with sealing reliability.
3Stability of the object's composition
If multiple limiting structures are added to the sealing ring, then position stability is improved, but device complexity increases
Solution Approach 1:
The sealing ring is segmented into sections with limiting structures that provide positional stability. This segmentation approach achieves stability requirements while maintaining a relatively simple overall structure that is easy to manufacture and assemble.
Solution Approach 2:
The limiting structures are positioned asymmetrically on the sealing ring based on the specific dimensional variations and positioning requirements of the terminal post. This asymmetric arrangement provides optimal stability with the minimum number of limiting structures needed, avoiding unnecessary complexity.
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 solution effectively reduces the likelihood of sealing ring dislocation, ensuring better sealing performance and safety by maintaining a tight fit between the sealing ring and terminal post, thereby reducing air and liquid leakage.
Implementation Method 1
The sealing ring is located between the second through-hole and the terminal-post body, and the sealing ring is in interference fit with the end cover
Data Source
AI summary
A terminal-post assembly, an end cover assembly, a battery, an energy-storage apparatus, and an electricity-consumption device are provided. The terminal-post assembly includes a terminal post and a sealing ring. The terminal post includes a terminal-post body, a base, and a terminal cap. One end of the terminal-post body is connected to the base, and the other end of the terminal-post body is connected to the terminal cap. A cross-sectional area of the terminal-post body is smaller than each of a cross-sectional area of the base and a cross-sectional area of the terminal cap. The sealing ring includes a sealing-ring body and multiple first limiting structures. The multiple first limiting structures are disposed at one side of the sealing-ring body positioned facing towards an axis of the sealing ring, and the multiple first limiting structures are spaced apart from each other in a circumferential direction of the sealing-ring body.