Bicycle Frame Multiple Chamber Section Battery Integration
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Solution Overview
Problem
Bicycles with electric auxiliary motors face challenges in design due to the weight and visibility of large and cumbersome battery packs, which are not discreet and can be easily stolen or require complex mounting/dismounting, and existing integration methods either weaken the frame or complicate servicing.
Innovation Solution
A bicycle frame with a multiple chamber section for the battery pack, allowing for discreet integration and easy detachment, using a hollow section with cutouts in only some chambers to maintain structural integrity and incorporating quick-release mechanisms and a controller for power regulation, along with a lithium polymer battery pack for enhanced capacity and self-discharge resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the battery pack is integrated into the frame, then the bicycle becomes more discreet and the battery is better protected, but the frame structure is weakened and manufacturing complexity increases
Solution Approach 1:
The frame section is divided into multiple chambers, with cutouts made in only some chambers while leaving others intact. This segmentation allows the battery to be integrated into specific chambers without compromising the structural integrity of the entire frame, as the intact chambers continue to provide strength and rigidity.
Solution Approach 2:
Different chambers serve different functions: some chambers are modified with cutouts to accommodate the battery pack, while other chambers remain intact to maintain structural strength. This local differentiation allows the frame to simultaneously achieve battery integration and structural integrity.
2Ease of operation
If the battery pack is made detachable, then theft prevention and charging convenience are improved, but the mounting and dismounting mechanism becomes more complex
Solution Approach 1:
The battery pack is designed as a separate, extractable component that can be removed from the frame without requiring disassembly of the frame itself. The quick-release mechanism allows the battery to be easily extracted and reattached, providing convenience for charging and theft prevention while minimizing structural complexity.
Solution Approach 2:
The mounting system incorporates a quick-release mechanism that transitions between locked and unlocked states, enabling rapid attachment and detachment of the battery pack. This dynamic mechanism simplifies operation compared to permanent or complex fastening systems.
3Ease of operation
If a through-going aperture is made in the frame for battery installation, then the battery can be easily accessed, but the frame becomes misshapen and requires additional strengthening
Solution Approach 1:
Instead of creating a through-going aperture that would distort the frame geometry, the battery is housed within specific chambers that are segmented from the rest of the frame structure. This allows battery access without compromising the overall shape and aesthetic of the frame.
Solution Approach 2:
The battery pack is nested within the hollow chambers of the frame structure, allowing the battery to be accommodated inside the existing frame geometry without requiring external modifications or through-going apertures that would alter the frame's shape.
Data Source
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AI summary
The present invention concerns a bicycle frame (1), including a number of frame elements (2, 3-,4, 5, 6), preferably tubes, where the frame elements are interconnected and constitute a construction with so great rigidity that the cycle frame (1) does not change its geometrical shape under usual load, where an electric battery system is at least partly embedded in the frame, includin at least one battery pack (7) for storing electric energy for use in connection with equipment, such as comfort equipment and/or safety equipment on a bicycle, including an electric auxiliary motor, where the part of the frame adapted to mounting a battery pack (7) is constituted by a hollow section, the hollow section being a multiple chamber section, where a battery pack (7) is predominantly arranged in a cutout (8) in the multiple chamber section so that at least one chamber (17) in the multiple chamber section is substantially intact. Thus is obtained a cycle frame with a cutout (8) for a battery pack, where the frame has great rigidity'.