EV Front Body Structure With Multi-Load Paths for Battery Protection
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Solution Overview
Problem
The existing front vehicle body structures for electric vehicles are not optimized to protect high-voltage batteries during frontal collisions, as they lack the necessary reinforcement to effectively disperse collision energy and prevent battery damage.
Innovation Solution
A front vehicle body structure that includes a dash upper side member, dash tunnel reinforcement member, dash cross member, dash cross side member, and dash cross battery mounting member, which are strategically connected to provide multiple load paths for collision energy dispersion and protect the battery mounting portion, minimizing deformation and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the battery module is mounted at the lower side of the vehicle body, then it is spatially advantageous to dispose a collision member at an upper side of the vehicle body, but the battery needs to be safely protected without being damaged in the event of a collision
Solution Approach 1:
The patent transitions from traditional front-side collision members to upper-side collision members, changing the spatial dimension of collision protection. The collision member is positioned at the upper side of the vehicle body in the width direction, creating a new protective dimension that indirectly protects the lower-mounted battery by preventing vehicle body pushback during frontal collisions
Solution Approach 2:
The collision member is positioned in advance at the upper side of the vehicle body to prevent pushback before collision damage can occur. This preemptive positioning creates a protective barrier that stops the collision force before it can transmit to the battery mounting portion at the lower side
2Adaptability or versatility
If a deep and wide tunnel part penetrates the middle portion of the vehicle body, then it is suitable for internal combustion engine vehicles, but it is not efficient for electric vehicles where the battery module is installed at the lower side
Solution Approach 1:
The patent applies local reinforcement by positioning the collision member specifically at the upper side of the vehicle body in the width direction, rather than using a universal tunnel structure. This localized approach provides targeted protection for the battery mounting portion while eliminating the need for a deep tunnel that would interfere with battery installation at the lower side
3Strength
If the vehicle body structure is optimized for internal combustion engine vehicles, then it provides adequate collision protection, but it cannot be optimized for battery mounting structure required for electric vehicles
Solution Approach 1:
The patent resolves the conflict between collision protection and battery mounting optimization by moving the collision member to the upper side of the vehicle body in the width direction. This dimensional change allows the lower side to be optimized for battery mounting while the upper side provides collision protection, enabling both functions to coexist without interference
Data Source
AI summary
According to a front vehicle body for providing strength against a frontal collision of an electric vehicle, locational characteristics and mounting characteristics of a high-voltage battery on a vehicle body platform for an electric vehicle are considered by connection structures of a dash upper side member, a dash tunnel reinforcement member, a dash cross member, and a dash cross side member.