Vehicle Battery Mounting Structure for Multi-Directional Collision Loads
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Solution Overview
Problem
Existing vehicle battery mounting structures are vulnerable to transverse and longitudinal loads during collisions, compromising durability and collision performance due to the battery being fastened to only one cross member.
Innovation Solution
A vehicle lower structure that distributes loads by coupling the battery mounting parts to both a transverse and longitudinal cross member, with additional reinforcement members to secure robustness and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the battery mounting part is fastened to only one cross member (transverse or longitudinal), then the structure is simple, but the battery is vulnerable to loads in any one direction and durability performance deteriorates
Solution Approach 1:
The patent merges the functions of transverse and longitudinal cross members into a single integrated mounting structure. The battery mounting part is coupled to both cross members simultaneously, combining their load-bearing capabilities to resist both transverse and longitudinal collision loads, thereby improving reliability without proportionally increasing complexity.
Solution Approach 2:
The patent transitions from a single-dimension mounting (one cross member) to a two-dimension mounting system where the battery mounting part is coupled to both transverse and longitudinal cross members. This dimensional expansion allows the structure to resist loads from multiple directions simultaneously, enhancing durability performance.
2Ease of manufacture
If the battery mounting part is fastened to only one cross member, then the manufacturing process is simple, but collision performance deteriorates under transverse and longitudinal loads
Solution Approach 1:
The patent combines multiple cross members (both transverse and longitudinal) into a unified mounting system. This merged structure maintains relative manufacturing simplicity while significantly improving collision performance by distributing and resisting loads from multiple directions through the integrated cross member assembly.
3Volume of moving object
If the battery is mounted on a single cross member, then the mounting structure is compact, but the coupled portion between battery and body becomes vulnerable to loads
Solution Approach 1:
The patent merges multiple cross members into a single coupled portion system where the battery mounting part connects to both transverse and longitudinal cross members. This creates a stronger, more robust coupled portion that can withstand collision loads from multiple directions while maintaining a compact overall structure.
Solution Approach 2:
The patent creates a composite mounting structure by combining different oriented cross members (transverse and longitudinal) into a unified coupled portion. This composite arrangement of structural elements enhances the overall strength and load-bearing capacity of the coupled portion between the battery and vehicle body.
Data Source
AI summary
A vehicle lower structure for mounting a battery includes a floor panel, a first transverse cross member mounted on the floor panel, a first longitudinal cross member mounted on the floor panel and having one end overlapped with and coupled to the first transverse cross member, and a first battery mounting part coupled to a first overlapping portion in which the first transverse cross member and the first longitudinal cross member overlap.