Electric Vehicle Frame Integrating Seat Post and Battery Case
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Solution Overview
Problem
Conventional electric vehicles have a complex structure and high weight due to a separate seat post supporting the seat, which complicates the integration of a battery chamber beneath the seat.
Innovation Solution
The body frame is simplified by integrating the seat post and battery case as components, with a main frame, seat frame, roof frame, and shield support part forming a closed loop structure, allowing the battery case to house the battery and the seat post to support the seat, reducing weight and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate seat post is used to support the seat, then the seat can be supported independently, but the structure becomes complex and weight increases
Solution Approach 1:
The patent merges the seat post with the battery case into a single integrated component. The seat post is formed as an integral part of the battery case structure, eliminating the need for separate seat post components while maintaining the function of supporting the seat. This integration directly reduces structural complexity and component count.
Solution Approach 2:
The battery case is designed to serve multiple functions: it houses the battery, provides structural support for the seat through its integrated seat post function, and contributes to the overall body frame structure. This multi-functionality eliminates the need for dedicated separate components for each function, reducing overall device complexity.
2Reliability
If a separate seat post is used to support the seat, then the seat can be supported independently, but weight increases
Solution Approach 1:
The seat post and battery case are merged into a single integrated component, eliminating redundant materials and manufacturing steps. This integration reduces the total weight by removing the need for separate seat post structures while maintaining adequate seat support capability.
Solution Approach 2:
The battery case performs multiple functions including battery housing, structural support, and seat post function. By making the battery case bear multiple loads and responsibilities, the design eliminates the need for additional weight-bearing components, thereby reducing overall vehicle weight.
3Quantity of substance
If the battery chamber is formed beneath the seat with a separate seat post, then the battery can be housed, but the structure becomes complex
Solution Approach 1:
The battery case and seat post are merged into a single integrated structure. The battery chamber is formed within the battery case itself, and the seat post function is provided by integral portions of the same component, eliminating the need for separate structural elements and simplifying the overall body frame structure.
Solution Approach 2:
The battery case is designed as a multi-functional component that simultaneously provides battery housing, structural support, and seat post functionality. This multi-functionality consolidates multiple structural roles into a single component, reducing device complexity while maintaining all necessary functions.
Data Source
AI summary
An electric vehicle wherein a seat post is provided as one of the components of a body frame for housing a battery. The body frame includes a main frame, a seat frame, a roof frame, and a shield support part. The main frame includes a battery case which is continuously integral with a rear portion of a head pipe wherein the battery is housed. The seat post is continuously integral with a rear portion of the battery case. The seat frame is configured to be connected to the upper end of the seat post for positioning a seat. The roof frame rises from the rear end of the seat frame and supports the rear end of a roof. The shield support part is provided on to project from a head pipe and, together with the windshield, supports a head lamp disposed on the front surface side of the windshield.