E-Bike Battery Holding Structure Without Screws or Extra Housing
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Solution Overview
Problem
The existing holding devices for electrical energy stores in electric bicycles are heavy due to additional housings and screw connections, which increase weight and manufacturing costs, and require additional production effort and complex installation processes.
Innovation Solution
A weight-optimized and cost-optimized holding device that fixes the electrical energy store to the frame tube without screws, using radial and axial forces, and incorporates elastic elements or adhesive materials to compensate for manufacturing tolerances and reduce the need for additional components and installation steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional hard housing is used to protect the electrical energy store, then reliability is improved, but weight increases
Solution Approach 1:
The holding device combines multiple functions into a single component: it provides mechanical fixation through radial and axial forces, integrates electrical contacts for power connection, and offers protective support. This eliminates the need for a separate hard housing while maintaining reliability and reducing weight.
Solution Approach 2:
The holding device is designed as a multi-functional component that simultaneously performs fixation, electrical connection, and protective support functions. This universal design replaces the traditional separate housing structure, achieving weight reduction while maintaining the necessary protection and reliability.
2Strength
If screw connections are used to fix the electrical energy store to the frame tube, then fixation strength is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts and eliminates the screw connection mechanism from the holding device. Instead of using threaded fasteners, the device relies on friction-based radial clamping forces and axial positioning, significantly simplifying the structure while maintaining adequate fixation strength for the application.
Solution Approach 2:
The traditional mechanical screw connection system is replaced with a friction-based clamping mechanism. The holding device exerts radial forces through friction contact between the electrical energy store jacket and the holding device surfaces, eliminating the need for threaded fasteners and reducing structural complexity.
3Ease of operation
If electrical contacts are integrated into the holding device, then ease of operation is improved, but manufacturing complexity and repair difficulty increase
Solution Approach 1:
The holding device merges the mechanical fixation function with the electrical connection function by integrating contacts directly into the clamping structure. This integration simplifies installation and operation while the modular design allows the electrical components to be replaced independently if needed.
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 solution reduces the weight and cost of the electrical energy store by eliminating the need for additional housings and screw connections, simplifying the production and installation process, and providing effective fixation without compromising the mechanical integrity of the frame tube.
Implementation Method 1
The holding device exerts at least a radial force on the electrical energy store, thereby fixing it
Implementation Method 2
the holding device may also exert axial holding forces on the electrical energy store
Implementation Method 3
incorporates elastic elements or adhesive materials to compensate for manufacturing tolerances
Implementation Method 4
incorporates elastic elements or adhesive materials to compensate for manufacturing tolerances
Data Source
AI summary
An electric bicycle includes an electric drive, at least one frame tube having an interior, an electrical energy store arranged in the interior of the frame tube, and a holding device configured to establish a connection between the electrical energy store and the frame tube. The frame tube in the interior has a receiving portion for receiving the electrical energy store. The holding device is configured to fix the electrical energy store in the interior to the frame tube and has no electrical contacts. Additionally, the holding device fixes the electrical energy store in the frame tube at least by a radial force, and the holding device is connected to the electrical energy store without a screw connection.