Battery Pack Lid Assembly With Adhesive Holder for Clean Sealing
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Solution Overview
Problem
Conventional battery packs face issues with adhesive application and sealing, leading to protrusion and inadequate sealing properties due to the liquid nature of adhesives, especially when using resin materials, which deteriorate the appearance and compromise the waterproof integrity.
Innovation Solution
The battery pack design incorporates an adhesive holder with a flat region and adhesive guide path to contain and guide the adhesive away from the bonding interface, ensuring it is applied correctly and preventing excess adhesive from protruding, while also reducing weight and cost through a simplified assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is applied to the bonding interface between the lid and main tubular body, then sealing property is improved, but adhesive protrusion occurs compromising appearance and waterproof integrity
Solution Approach 1:
The bonding interface is segmented into two distinct regions: a first bonding region for adhesive application and a second bonding region free of adhesive. This segmentation is achieved through the adhesive holder that defines a first bonding surface and a second bonding surface, allowing adhesive to be confined to the first region while the second region remains clean and protrusion-free.
Solution Approach 2:
The adhesive holder acts as an intermediary component between the lid and the main tubular body. It provides a structured platform that guides adhesive flow and confines it to the desired bonding region, preventing unwanted protrusion while ensuring adequate sealing at the bonding interface.
2Reliability
If adhesive is applied generously to ensure sealing, then sealing property is improved, but adhesive protrusion increases
Solution Approach 1:
The adhesive holder creates local quality differences across the bonding interface by providing a first bonding surface with adhesive and a second bonding surface without adhesive. This allows different bonding characteristics in different regions, ensuring adequate sealing where needed while maintaining appearance quality in other regions.
Solution Approach 2:
The adhesive holder is prepared in advance with the adhesive on its first bonding surface before the actual bonding operation. This preliminary preparation ensures that adhesive is already positioned and controlled, preventing uncontrolled protrusion during the bonding process while ensuring adequate sealing.
3Manufacturing precision
If adhesive holder structure is added to control adhesive, then adhesive guidance is improved, but device complexity increases
Solution Approach 1:
The adhesive holder serves multiple functions simultaneously: it provides a bonding interface, guides adhesive flow, prevents protrusion, and structurally connects the lid to the main tubular body. By consolidating these functions into a single component, the overall device complexity is minimized despite the added adhesive control capability.
Solution Approach 2:
The adhesive holder merges the adhesive application function with the structural bonding function. Instead of separate components for adhesive application and structural connection, the adhesive holder integrates both roles, simplifying the overall assembly structure while providing precise adhesive guidance.
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
This design ensures stable sealing properties by effectively guiding and containing adhesive, preventing protrusion and leakage, thereby maintaining the appearance and waterproof integrity of the battery pack.
Implementation Method 1
an adhesive guide path between the lid and an inner surface of the main tubular body, the adhesive guide path allowing the adhesive holding space to communicate with a bonding interface
Implementation Method 2
The adhesive holder constitutes an adhesive holding space on the flat region, the adhesive holding space holding the adhesive
Data Source
AI summary
A battery pack includes: a core block including a secondary battery cells; a main tubular body having an opening end and having a core housing space therein, the core housing space housing the core block therein; a lid closing the opening end of the main tubular body; an adhesive fixing the lid to the main tubular body; and an adhesive holder provided between the lid and the core block, the adhesive holder having a surface facing the lid, the surface of the lid having a flat region at least at periphery of the surface of the lid. The adhesive holder constitutes an adhesive holding space on the flat region, the adhesive holding space holding the adhesive. The lid and the main tubular body constitute an adhesive guide path between the lid and an inner surface of the main tubular body. The adhesive guide path allows the adhesive holding space to communicate with a bonding interface at which the lid is bonded to an end surface of the opening end of the main tubular body, the adhesive guide path guiding the adhesive to the bonding interface through the adhesive guide path.