Electric Straddle Vehicle Battery Case Rigidity via Module Integration
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Solution Overview
Problem
The battery case in electric straddle-type vehicles lacks sufficient rigidity, leading to inadequate structural support during travel, which affects the overall vehicle body rigidity.
Innovation Solution
The battery case is connected to the vehicle body frame via a battery module, enhancing the rigidity of both the battery case and the vehicle body frame in the front-rear direction, ensuring improved structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the battery case is screwed to the seat frame, then the battery can be fixed in place, but the rigidity of the battery case and vehicle body frame is insufficient due to impact transmission during traveling
Solution Approach 1:
The battery module integrates multiple components (battery cells, control units, circuit breakers) into a single unified structure that serves both as the power source and as a structural reinforcement element. By merging the battery case with the vehicle body frame through integrated fixing portions, the invention creates a combined structure where the battery module itself becomes a rigid support component, eliminating the need for separate rigid mounting structures while improving overall rigidity and reliability.
2Strength
If the battery case is made more rigid to improve vehicle body rigidity, then the structural support improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The battery case is designed to perform multiple functions simultaneously: it houses the battery cells and electronic components, provides structural support to the vehicle body frame, and serves as a mounting platform for fixing portions. This multi-functionality eliminates the need for separate structural reinforcement components, thereby improving vehicle body rigidity without increasing device complexity or manufacturing difficulty.
Solution Approach 2:
The battery case is divided into multiple sections with dedicated fixing portions (front, rear, left, right) that can be independently designed and manufactured. This segmentation allows for optimized local reinforcement without requiring the entire battery case structure to be redesigned, thus improving overall rigidity while maintaining manufacturing simplicity and reducing device complexity.
Data Source
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AI summary
A rigidity of a battery itself is ensured and a rigidity of an entire vehicle body is further improved. The battery is fixed to a vehicle body frame of an electric straddle-type vehicle. The battery is provided with a battery module to which electric power for traveling is charged; and a battery case accommodating the battery module. A front side case fixing portion and a rear side case fixing portion fixed at portions separated in a front-rear direction of the vehicle body frame are formed on an outer surface of the battery case, and a front side module fixing portion and a rear side module fixing portion that fix a front side and a rear side of the battery module are formed on an inner surface of the battery case.