Battery-Fixing Structure with Reinforcing Plates
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Solution Overview
Problem
Existing battery-fixing structures in vehicles limit design flexibility due to reliance on vehicle-body frames, which restrict battery placement and may not provide sufficient rigidity for supporting heavy batteries.
Innovation Solution
A battery-fixing structure that uses a battery-receiving portion created by depressing a floor panel in the rear vehicle body, reinforced with an upper and lower reinforcing plate, and additional structural elements like side walls and projections to rigidly support the battery without relying on the vehicle-body frame, enhancing the rigidity of the rear vehicle body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the battery is fixed to the vehicle-body frame, then the battery is supported rigidly, but the position where the battery can be placed is limited
Solution Approach 1:
The battery fixing structure is segmented into independent components: battery-receiving portion, upper reinforcing plate, lower reinforcing plate, and fixing members. This segmentation allows the battery to be placed in the rear part of the vehicle body away from the frame, while each component performs its specific function to achieve rigid support without requiring complex integration with the vehicle-body frame.
Solution Approach 2:
The upper and lower reinforcing plates act as intermediary elements between the battery and the vehicle body. These plates transfer and distribute the battery weight to the vehicle-body floor panel and frame, providing rigid support while allowing flexible battery placement positions that would not be directly accessible to the frame structure.
2Adaptability or versatility
If the battery is fixed to a floor panel without vehicle-body frame aid, then battery placement flexibility is improved, but the floor panel may not rigidly support the heavy battery
Solution Approach 1:
The upper reinforcing plate, lower reinforcing plate, battery-receiving portion, and vehicle-body floor panel are merged into an integrated reinforcing structure. This combination creates a unified load-bearing system that can rigidly support the heavy battery while allowing flexible placement positions on the floor panel without direct frame connection.
Solution Approach 2:
The reinforcing structure extends in multiple dimensions: the upper and lower reinforcing plates provide vertical reinforcement, the battery-receiving portion provides horizontal positioning, and the fixing members provide vertical anchoring. This multi-dimensional reinforcement system achieves rigid support that a single-plane floor panel cannot provide alone.
3Strength
If reinforcing plates are added to the battery-receiving portion, then the support rigidity is improved, but the device complexity increases
Solution Approach 1:
The upper and lower reinforcing plates serve multiple functions: they reinforce the battery-receiving portion, distribute battery weight to the vehicle body, provide mounting surfaces for fixing members, and enhance overall structural rigidity. This multi-functionality reduces the need for additional specialized components, thereby limiting the increase in device complexity despite the added reinforcement.
Data Source
AI summary
A battery-fixing structure includes a battery-receiving portion provided by depressing downward a floor panel in a rear part of a vehicle body, the battery-receiving portion including a battery-supporting wall member; an upper reinforcing plate having a recess that is depressed downward; and a lower reinforcing plate having a first projection that is raised upward. The battery-supporting wall member is held between the upper reinforcing plate and the lower reinforcing plate. The recess, the battery-supporting wall, and the first projection are joined to one another in such a manner as to overlap one another in a top-bottom direction. A battery is fixed to the upper reinforcing plate with a fixing member.