Vehicle Lower Structure Hanging Bracket for Battery Pack
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Solution Overview
Problem
In vehicles with battery packs mounted underneath the floor, interference occurs between the battery pack and other components, such as suspension members, during attachment and detachment, requiring the suspension member to be removed.
Innovation Solution
A vehicle lower structure design that includes a cross member under the floor, a suspension member connected to a movable part, and a hanging bracket that supports the battery pack from the cross member, allowing the battery pack to be attached and detached without removing the suspension member, with the hanging bracket extending between the battery pack and the suspension member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the battery pack is attached and detached using conventional mounting methods, then the battery pack can be securely fixed to the vehicle body, but the suspension member must be removed to avoid interference during attachment and detachment
Solution Approach 1:
The patent changes the spatial dimension of the hanging bracket from a horizontal arrangement to a vertical arrangement. The bracket extends in the vehicle upper-lower direction and connects to the lower surface of the cross member, allowing the battery pack to be mounted below the suspension member in the vertical dimension, thus avoiding interference during attachment and detachment operations
Solution Approach 2:
The hanging bracket serves as an intermediary component between the cross member and the battery pack. It provides a dedicated mounting interface that mediates the connection, allowing the battery pack to be securely attached and detached without interfering with the suspension member, thereby resolving the conflict between secure mounting and ease of operation
2Ease of operation
If the hanging bracket is positioned to avoid interference with the suspension member, then the battery pack can be attached without removing the suspension member, but the dimensions of the cross member and hanging bracket increase
Solution Approach 1:
The patent utilizes the vertical dimension (vehicle upper-lower direction) for the hanging bracket's extension, rather than extending in the front-rear or left-right directions. This dimensional reorientation allows the bracket to clear the suspension member while minimizing increases in the overall vehicle footprint and component dimensions in the horizontal plane
Solution Approach 2:
The lower surface of the cross member is specifically designed with a facing surface that locally provides the connection interface for the hanging bracket. This localized design feature allows the bracket to connect without requiring the entire cross member to be oversized, thus minimizing the increase in overall dimensions while achieving the interference-free mounting goal
Data Source
AI summary
A vehicle lower structure includes: a floor of a vehicle; a cross member that is provided under the floor and extends in a vehicle width direction; a battery pack mounted under the floor; a suspension member with which a movable part of a suspension is connected so that the movable part is able to operate, the suspension member being positioned on a front side or a rear side of the battery pack and fixed to a vehicle body; and a hanging bracket that is hung from the cross member and is connected with an end surface of the battery pack on a suspension member side by a fastening component such that the hanging bracket supports the battery pack in a hanging manner. The battery pack and the hanging bracket are connected with each other below the suspension member.