Vehicle Battery Mounting Brittle Coupling for Collision Protection
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Solution Overview
Problem
The existing vehicle battery mounting structures are susceptible to deformation during rear-end collisions, which can lead to damage to the battery unit due to the deformation of frame members.
Innovation Solution
A vehicle battery mounting structure that includes a first frame member with an inclined portion and a coupling portion featuring a brittle section, designed to release the battery unit from the frame member connection under forward load, reducing the likelihood of deformation during collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the battery unit is rigidly mounted to the frame member, then the structural integrity is improved, but the battery unit is deformed during rear-end collision
Solution Approach 1:
The coupling portion is divided into a rigid portion and a brittle portion, creating a segmented connection system where each part serves a specific function: the rigid portion maintains structural integrity during normal operation, while the brittle portion sacrifices itself to protect the battery during collisions
Solution Approach 2:
The coupling portion acts as an intermediary element between the frame member and battery unit. It mediates the force transmission during normal operation to maintain structural integrity, while during collision it fails in a controlled manner to prevent direct force transmission to the battery, thus protecting it from deformation
2Strength
If the coupling portion is made strong to prevent deformation, then the structural integrity is improved, but the complexity of the mounting structure increases
Solution Approach 1:
Different portions of the coupling structure have different mechanical properties: the rigid portion is designed with high strength to maintain connection during normal operation, while the brittle portion is designed with lower strength to fail during collision. This local differentiation of material properties allows the structure to achieve both strength and protection without excessive complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The structure effectively reduces the risk of battery unit deformation by releasing the connection between the frame member and the battery unit under load, thereby minimizing damage and allowing for increased battery capacity while maintaining structural integrity.
Implementation Method 1
The brittle portion is provided at the coupling portion and releases the inclined portion or the second frame member from a connection with the battery unit when a forward load in the front-rear direction of the vehicle is applied to the coupling portion
Data Source
AI summary
A vehicle battery mounting structure includes a first frame member, a battery unit, a coupling portion, and a brittle portion. The first frame member supports a vehicle floor and includes a front portion, an inclined portion and a rear portion. The inclined portion extends rearward from a rear end of the front portion in a front-rear direction of the vehicle and upward from the rear end in a vertical direction of the vehicle. The battery unit is disposed under the vehicle floor. The coupling portion couples the battery unit to the inclined portion or a second frame member connected to the inclined portion. The brittle portion is provided at the coupling portion and releases the inclined portion or the second frame member from a connection with the battery unit when a forward load is applied to the coupling portion in the front-rear direction of the vehicle.