EV Body Structure Using Battery Case Reinforcement for Collision Load Paths
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Solution Overview
Problem
Electric vehicle bodies face challenges in minimizing intrusion of collision loads into passenger and battery spaces during front-end or rear-end collisions, leading to increased weight due to the need for strong materials in anti-intrusion zones.
Innovation Solution
The electric vehicle body design incorporates a battery case with reinforcing members that act as load support members, distributing collision loads and preventing intrusion by aligning coupling positions with imaginary cross-sections of reinforcing members, thereby reducing the need for strong materials in anti-intrusion zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If strong and thick materials are applied to members surrounding the battery space, then the anti-intrusion zone strength is improved, but the vehicle body weight increases
Solution Approach 1:
The patent merges the battery case with load support functions by integrating reinforcing members into the battery case structure. The battery case is directly coupled to the side seal and cross member, allowing it to serve dual purposes: protecting batteries and supporting collision loads, thereby eliminating the need for separate strong materials in the anti-intrusion zone.
Solution Approach 2:
The battery case is designed to perform multiple functions simultaneously: it protects the battery space and acts as a load support member in the anti-intrusion zone. By coupling the battery case to the side seal and cross member, the structure achieves both battery protection and collision load bearing capabilities without requiring additional specialized components.
2Stability of the object's composition
If the battery case is coupled to the side seal and cross member with aligning coupling positions, then the collision load distribution is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by strategically positioning reinforcing members at specific locations within the battery case that correspond to coupling positions with the side seal and cross member. This localized reinforcement at critical coupling points optimizes load distribution while concentrating manufacturing precision requirements only at these specific locations rather than throughout the entire structure.
Data Source
AI summary
The present invention relates to an electric vehicle body capable of minimizing the intrusion of a collision load into a passenger space and a battery space during a front-end or rear-end collision, and comprises: a front side member having one side coupled to a front bumper beam, and the other side branching off to include a first branch part and a second branch part; a first front cross member coupled to the first branch part and the second branch part; a side seal coupled to the second branch part; a front subframe coupled to the front side member; and a battery case, which includes a reinforcing member extended in the longitudinal direction of the vehicle body and is coupled to the side seal and the first front cross member.