Case-Free Battery Framework for Electric Cycles
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Solution Overview
Problem
The lack of standardization in two-wheel electric cycle vehicle batteries and their containers leads to difficulties in finding replacements, resulting in premature scrapping and reduced resale value.
Innovation Solution
A battery containment framework within the ECV2 frame that accommodates off-the-shelf batteries, eliminating the need for a custom battery case, with removable sides for easy battery replacement and protective electrical interconnections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a custom molded plastic battery container is used to house the battery, then the battery is protected and secured in the frame, but the ECV2 loses resale value or requires premature scrapping when the battery needs replacement due to lack of standardization
Solution Approach 1:
The frame main tube is designed with a standardized battery acceptance cavity that can accommodate off-the-shelf batteries of standard sizes (e.g., Group U1, U2, L6). This universal interface allows the ECV2 to accept multiple battery types and brands, enabling easy replacement and extending the vehicle's useful life beyond the battery's service life.
Solution Approach 2:
The battery containment structure is segmented into the frame main tube cavity and removable battery retaining means. This segmentation allows the battery to be independently removed and replaced without affecting the frame structure, facilitating easy battery replacement while maintaining structural integrity.
2Reliability
If a custom molded plastic battery container is used, then the battery is enclosed and protected, but the overall device complexity increases due to the additional battery case component
Solution Approach 1:
The battery containment function is merged into the frame main tube structure itself, eliminating the need for a separate battery case. The frame main tube incorporates both structural support and battery housing functions, reducing the number of components while maintaining protection and security.
Solution Approach 2:
The frame main tube serves multiple functions: it provides structural support for the vehicle frame and simultaneously houses the battery through the acceptance cavity. This multi-functionality eliminates the need for a dedicated battery case, reducing device complexity.
3Reliability
If a custom molded plastic battery container is used, then the battery is secured in the frame, but the manufacturing cost increases due to customization requirements
Solution Approach 1:
The frame main tube is designed with a universal battery acceptance cavity that accommodates standard-size batteries. This eliminates the need for custom-molded battery cases, allowing manufacturers to use conventional frame manufacturing processes and reducing production costs.
Solution Approach 2:
The battery acceptance cavity is designed with standardized dimensions that match off-the-shelf battery sizes. By changing the parameters to standard dimensions rather than custom dimensions, the manufacturing process becomes simpler and more cost-effective.
4Reliability
If the battery is housed in a separate battery case, then the battery is protected, but the useful life of the ECV2 is limited by the battery or battery case lifecycle
Solution Approach 1:
The standardized battery acceptance cavity in the frame main tube allows the ECV2 to accept multiple generations of standard-size batteries. This universality extends the vehicle's useful life beyond the lifespan of any single battery, as batteries can be replaced without replacing the entire vehicle.
Solution Approach 2:
The battery retaining means is designed to be removable, allowing dynamic replacement of the battery. This dynamic capability enables the battery to be replaced independently when it reaches the end of its service life, extending the overall useful life of the ECV2.
Data Source
AI summary
The present utility model discloses a two wheel electric motorized cycle frame incorporating a case-free battery, including a frame main body with a battery containment framework disposed on the frame main body. The battery is contained by the battery containment framework. At least one side of the framework is removable to facilitate replacing the battery, and partition boards are inserted in the framework to separate out a protective cavity for electrical connections. According to the present utility model, the battery is placed in the battery containment framework, so that a battery case is omitted. The battery is safely fixed in the framework, and one side of the framework is removable to facilitate replacing the battery. Furthermore, the partition boards are disposed in the framework to separate out the protective cavity for electrical connections of battery cables, thereby solving the problem that the battery cables are exposed to the outside and cannot be effectively accommodated due to replacement of an enclosed battery case with an open framework.