Seamless Cylindrical Battery Enclosure for Medical Devices
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Solution Overview
Problem
Conventional battery enclosures for medical devices have a low energy density due to multiple seams, which increases the size of implantable medical devices and limits flexibility in enclosure shape, and existing multilayer sheets do not allow for seamless cylindrical designs.
Innovation Solution
A multilayer battery enclosure formed from a substantially cylindrical member with a continuous, seamless body defining a cavity between two ends, minimizing seams and increasing energy density, and allowing for cylindrical or flat shapes, using materials like metallic foil sheets with heat-sealable inner layers and impermeable outer layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional battery enclosures with multiple seams are used, then the enclosure can be manufactured with existing multilayer sheets, but the energy density is low and the device size is large
Solution Approach 1:
The patent applies spheroidality by transitioning from flat multilayer sheets to a seamless cylindrical battery enclosure. The cylindrical shape eliminates the need for multiple seams and joins required by flat enclosures, thereby increasing energy density while maintaining manufacturability through specialized forming processes
Solution Approach 2:
The patent merges multiple separate enclosure pieces into a single seamless cylindrical body. By integrating what would traditionally require multiple seams and joins into one continuous structure, the design increases energy density and reduces overall device size while still being manufacturable
2Volume of moving object
If conventional battery enclosures with multiple seams are used, then the enclosure can be manufactured with existing multilayer sheets, but the device size increases
Solution Approach 1:
The cylindrical curvature allows for a more compact device volume compared to flat enclosures with seams. The seamless design eliminates the space required for multiple joins and seams, reducing overall device size while being manufacturable through specialized cylindrical forming processes
Solution Approach 2:
By merging multiple enclosure segments into a single seamless cylindrical structure, the patent reduces the total volume required for the enclosure. This eliminates the need for additional space to accommodate seams and joins, thereby reducing device size while maintaining ease of manufacture
3Adaptability or versatility
If conventional battery enclosures are used, then the manufacturing process is straightforward with multilayer sheets, but flexibility in enclosure shape is limited
Solution Approach 1:
The cylindrical shape provides superior flexibility compared to conventional flat enclosures. The curved seamless design can be more easily adapted to different device configurations and implantation sites, while the specialized forming process maintains manufacturability
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 enhances energy density and reduces the size of medical devices while enabling flexible enclosure shapes, improving the performance and compactness of implantable medical devices.
Implementation Method 1
metallic foil sheets with heat-sealable inner layers
Data Source
AI summary
In one example, the disclosure is directed to a medical device comprising an outer housing and a battery within the outer housing, where the battery is configured to supply power to one or more electronic components of the medical device. The battery comprises a first electrode, a second electrode, an electrolyte, and a multilayer battery enclosure. The multilayer battery enclosure comprises a substantially cylindrical member including a continuous multilayer body defining a cavity between a first end and a second end, and wherein at least one of the first end and second end are sealed to enclose the first electrode, second electrode, and the electrolyte within the cavity of the multilayer battery enclosure.