Deep-Sea Battery Pouch Structure for High-Pressure Compensation
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Solution Overview
Problem
Deep-sea battery devices face pressure-related issues due to deformation of pressure compensation assemblies, leading to reduced service life and potential damage from tension, as existing flat pouch structures are prone to rupture under high pressure.
Innovation Solution
A deep-sea battery device design featuring a housing, pouch, and protective cover with an annular cushioning protrusion that reduces deformation at the connection portion, allowing for effective pressure balancing and increased service life, while also improving energy density and reducing material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat pouch structure is used for the pressure compensation assembly, then the structure is simple and easy to manufacture, but the pouch is prone to rupture under high pressure due to large deformation at the fixed end
Solution Approach 1:
The pouch is designed with a curved surface instead of a flat structure. The curved surface allows for more uniform distribution of pressure during deformation, reducing stress concentration at the fixed end and preventing rupture while maintaining manufacturing feasibility
Solution Approach 2:
The pouch incorporates a cushioning portion with compressed resilient material that provides pre-cushioning before the pouch encounters high pressure. This cushioning layer absorbs and distributes the pressure stress, preventing sudden rupture and extending the service life of the pouch
2Reliability
If the pouch wall is made thicker to prevent rupture, then the reliability improves, but the energy density decreases and manufacturing costs increase
Solution Approach 1:
The curved surface design of the pouch enables more efficient stress distribution throughout the structure, allowing the pouch to withstand high pressure with a thinner wall thickness compared to a flat design, thereby maintaining energy density while improving reliability
Solution Approach 2:
The cushioning portion made of compressed resilient material provides a protective layer that absorbs pressure stress before it reaches the pouch wall. This allows the pouch wall to be made thinner while still preventing rupture, thus maintaining high energy density without compromising reliability
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 design significantly reduces deformation and tension on the connection portion, enhancing the pouch's service life, improving energy density, and lowering manufacturing costs by allowing for a thinner pouch wall and reduced material usage.
Implementation Method 1
The cushioning portion at least comprises an annular cushioning protrusion surrounding a periphery of the body. The cushioning protrusion protrudes toward an interior of the housing. A side of the cushioning protrusion away from the interior of the housing defines a groove.
Data Source
AI summary
A deep-sea battery device includes: a housing, a pouch, and a protective cover. The housing defines a pressure-releasing port, the pouch seals the pressure-releasing port. The pouch includes a body, a cushioning portion, and a connection portion. The cushioning portion is disposed between the body and the connection portion. The connection portion is clamped between the protective cover and the housing. The cushioning portion at least comprises an annular cushioning protrusion surrounding a periphery of the body. The cushioning protrusion protrudes toward an interior of the housing. A side of the cushioning protrusion away from the interior of the housing defines a groove. An opening of the groove faces the protective cover. The protective cover defines a through hole, the through hole is disposed at a position corresponding to the body. The body is disposed lower than an outer side of the housing that defines the pressure-releasing port.