Vehicle Lower Structure Using Battery Case for Seat Belt Anchor Rigidity
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Solution Overview
Problem
Existing vehicle designs that enhance rigidity at seat belt anchor locations through reinforcing members lead to increased weight and manufacturing costs.
Innovation Solution
A vehicle lower part structure incorporating a battery case supported by a metal cast vehicle body portion with a battery support that includes a vertical and horizontal wall, reinforced by ribs, and a cross member forming a frame structure, with the seat belt anchor attached via a fastening member, thereby improving rigidity without adding weight or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a reinforcing member is provided at the seat belt anchor location to enhance rigidity, then the rigidity against tensile load is improved, but the vehicle weight and manufacturing cost increase
Solution Approach 1:
The battery case is designed to serve dual functions: it accommodates the battery (original function) and simultaneously acts as a reinforcing member that enhances rigidity at the seat belt anchor location (new function). The battery case is positioned and structured to provide structural support to the seat belt anchor, eliminating the need for separate reinforcing members and thereby preventing weight increase while maintaining improved rigidity
Solution Approach 2:
The invention merges the battery case with the vehicle body structure by positioning it to function as both a battery housing and a structural reinforcement element. The battery case is integrated into the vehicle body such that it provides rigidity support to the seat belt anchor area, combining two previously separate functions into one component
2Strength
If a reinforcing member is provided at the seat belt anchor location to enhance rigidity, then the rigidity against tensile load is improved, but the manufacturing cost increases
Solution Approach 1:
The battery case is designed to serve dual functions: it accommodates the battery (original function) and simultaneously acts as a reinforcing member that enhances rigidity at the seat belt anchor location (new function). This multi-functionality eliminates the need for separate reinforcing members, reducing part count and assembly complexity, thereby lowering manufacturing cost while maintaining improved rigidity
Solution Approach 2:
The invention merges the battery case with the vehicle body structure by positioning it to function as both a battery housing and a structural reinforcement element. This consolidation reduces the number of separate components and assembly steps, simplifying manufacturing and reducing costs while providing the necessary structural reinforcement
Data Source
AI summary
A vehicle lower part structure includes a battery case that houses a battery and is disposed at a lower portion of the vehicle, a vehicle body constituting portion that is a metal cast product and has a battery support portion that supports the battery case, and an anchor member that is attached to a vehicle upper side of the battery support portion.