EV Front Reinforcement Structure for Battery Impact Dispersion
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Solution Overview
Problem
Electric vehicles face challenges in absorbing impact loads during collisions due to the absence of engine components, leading to potential damage to batteries when the traveling motor is positioned close to the rear, which can exert impact loads on the batteries.
Innovation Solution
A vehicle-body front structure with a partition wall portion bulging into the cabin to house the traveling motor, a reinforcement member extending from this portion to the rear, and a reinforcement member mounted on an inside-unit member to disperse impact loads, ensuring the motor is positioned rearward and protecting the batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the traveling motor is disposed close to the vehicle rear side, then the crash stroke in the front-rear direction is sufficiently secured, but the traveling motor may exert impact load on the battery during collision
Solution Approach 1:
The patent introduces a reinforcement member as an intermediary structure between the motor arrangement portion and the battery unit. This reinforcement member absorbs and distributes impact forces, preventing direct transmission of impact load from the traveling motor to the battery during collision, thus resolving the contradiction between securing crash stroke and protecting the battery.
Solution Approach 2:
The reinforcement member is pre-installed in the battery unit before collision occurs. This structure provides beforehand cushioning by being positioned to receive and dissipate impact forces that may be exerted on the battery during rearward collision, preventing direct impact on the battery while allowing the motor to be positioned rearward for adequate crash stroke.
2Device complexity
If accessory components are largely decreased in electric vehicle compared to engine vehicle, then the vehicle structure is simplified, but the impact load cannot be sufficiently absorbed during collision
Solution Approach 1:
The reinforcement member serves multiple functions: it strengthens the battery unit structure, absorbs impact forces during collision, and provides a mounting structure for the motor arrangement portion. This multi-functionality compensates for the reduced accessory components in electric vehicles, maintaining impact absorption capability while keeping the vehicle structure simplified.
Solution Approach 2:
The patent merges the functions of impact absorption and structural support into the reinforcement member and battery unit assembly. By combining these functions into a single integrated structure, the vehicle maintains adequate impact load absorption capability without requiring separate accessory components, thus resolving the contradiction between structural simplification and impact absorption.
Data Source
AI summary
A vehicle-body front structure includes a partition wall portion which is provided to extend in a vehicle width direction in a vehicle front portion, a motor arrangement portion which is formed by causing a part of the partition wall portion to bulge to an inside of a vehicle cabin and in which at least a part of a traveling motor is capable of being arranged, and a reinforcement member which extends from the motor arrangement portion to vehicle rear. A rear portion of the reinforcement member is mounted on a inside-unit member which is provided in the battery unit.