Folded Laminate Battery Exterior for Better Thermal Contact
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Solution Overview
Problem
Conventional storage battery cooling and heating structures experience decreased efficiency due to the contact state between the storage battery and heat conductive materials, which affects the heat transfer process.
Innovation Solution
A storage battery design featuring a laminate film exterior body formed by folding, with specific recess portions and a folded peripheral edge configuration that ensures a flat contact surface with heat transfer members, enhancing heat transfer efficiency by minimizing irregularities and promoting close contact between the battery and the heat transfer member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heat conductive material is provided between the storage battery and the cooling structure, then the storage battery is protected and the cooling structure is isolated, but the cooling and heating efficiency decreases due to contact state issues
Solution Approach 1:
The exterior body is divided into a housing portion and a peripheral edge portion, with the peripheral edge portion further divided into first and second portions. This segmentation allows different regions to serve different functions: the housing portion provides protection while the peripheral edge portions ensure thermal contact, thus resolving the contradiction between protection and heat transfer efficiency.
Solution Approach 2:
Different portions of the exterior body have different structural characteristics. The first portion of the peripheral edge portion is configured to contact the cooling structure with high thermal contact, while the housing portion provides protective enclosure. This local differentiation allows simultaneous achievement of protection and efficient heat transfer.
2Ease of manufacture
If the exterior body is formed by folding a member in two, then the structure is simplified and manufacturing is easier, but the contact surface irregularities increase reducing heat transfer efficiency
Solution Approach 1:
The exterior body utilizes the flexibility of the folded laminate film to dynamically adapt its shape. The folded portions can deform to conform to the cooling structure's surface, ensuring intimate contact despite the simplified folded construction. This dynamic adaptation resolves the contradiction between manufacturing simplicity and heat transfer efficiency.
Solution Approach 2:
The peripheral edge portion acts as an intermediary between the folded exterior body and the cooling structure. It is specifically configured to bridge the gap and ensure thermal contact, mediating between the simplified folded structure and the requirement for efficient heat transfer.
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 effectively suppresses the decrease in cooling and heating efficiency by ensuring efficient heat transfer, allowing for improved energy density and reduced heat resistance in storage batteries.
Implementation Method 1
efficiently transfer the heat of the storage battery
Data Source
AI summary
A storage battery includes: a power generation element; and an exterior body configured to wrap the power generation element, the exterior body is formed by folding a member forming the exterior body in two at a folded portion, the exterior body includes a housing portion housing the power generation element, and a peripheral edge portion around the housing portion including the folded portion, and a first portion of the peripheral edge portion closer to the folded portion than a side surface of the housing portion adjacent to the folded portion is folded along the side surface.