Shaped Battery Cells for Compact AR Headset Temple Arms
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Solution Overview
Problem
Traditional augmented-reality headsets face challenges in accommodating battery cells due to space limitations, often resulting in bulkier designs and rectangular battery profiles that dictate the shape of the headset.
Innovation Solution
The use of non-rectangular metal-encased battery cells that conform to the interior shapes of the temple arms or frame of the augmented-reality headset, allowing for a more traditional and compact design while increasing battery storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional rectangular battery cells are used, then manufacturing is simpler and batteries are readily available, but the headset becomes bulkier and cannot conform to traditional glass-like shapes
Solution Approach 1:
The battery cell geometry is changed from traditional rectangular to non-rectangular shapes (triangular, trapezoidal, curved) that conform to the interior surfaces of temple arms and frame portions. This parameter change in battery shape allows the headset to achieve traditional glass-like profiles while accommodating sufficient battery capacity.
Solution Approach 2:
The battery cells are designed with varied thickness profiles and non-uniform dimensions to match the three-dimensional interior surfaces of the headset components. This dimensional adaptation allows the batteries to conform to curved and angled surfaces within the temple arms and frame portions.
2Duration of action of moving object
If battery size is increased to extend usage time, then duration of action increases, but the headset becomes bulkier
Solution Approach 1:
The battery cells utilize non-rectangular geometries with optimized surface areas and volumes that conform to the available interior spaces in temple arms and frame portions. This allows maximum battery capacity to be packed into the constrained volume without increasing the external dimensions of the headset.
Solution Approach 2:
Curved and rounded battery cell designs are employed to better utilize the three-dimensional interior spaces of the headset components, achieving more efficient volume utilization compared to rigid rectangular batteries.
3Quantity of substance
If non-rectangular battery cells are used, then headset can have traditional shape and increased battery storage, but manufacturing becomes more complex
Solution Approach 1:
The battery manufacturing process is adapted to produce non-rectangular cells with specific geometric parameters (triangular, trapezoidal, curved profiles) that match the headset interior surfaces. This includes customizing electrode layouts, separator configurations, and housing geometries to achieve the desired shapes while maintaining manufacturing feasibility.
Data Source
Figure 1
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Figure 3A~3B
AI summary
An example augmented-reality headset comprises a frame portion, a temple arm portion coupled with the frame portion, and a metal-encased battery cell having an exterior surface that defines a non-rectangular shape. The metal-encased battery cell is configured to be housed within the temple arm portion, and the non-rectangular shape of the exterior surface follows an interior shape of an internal surface of the temple arm portion. The augmented-reality headset also comprises one or more artificial-reality processing or presentation devices, wherein at least one of the one or more artificial-reality processing or presentation devices is configured to receive power from the metal-encased battery cell.