EV Battery Side Protection Structure for Collision Force Dispersion
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Solution Overview
Problem
Existing battery protection systems for electric vehicles fail to effectively safeguard the side surfaces of battery packs during collisions, leading to potential damage and increased vehicle weight due to inadequate coverage and design inefficiencies.
Innovation Solution
A battery protection apparatus is designed to be positioned under the side sill of a vehicle, featuring a protrusion portion and a protection apparatus main body with a cavity, where the protrusion portion and gaps between components disperse collision forces, reducing impact on the battery pack. The apparatus is fixed to the side sill via a fixation portion, allowing it to move and absorb forces, while gaps and a cavity within the protection apparatus further mitigate collision damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a collision protection apparatus with collision prevention beam and energy absorption beam is provided at the side of the battery pack, then collision energy can be absorbed to protect the battery pack, but the protection apparatus cannot suitably cover the side surface of the battery pack, causing the collision prevention beam to deform and collide with unprotected portions of the battery pack
Solution Approach 1:
The protection apparatus extends not only horizontally along the side surface but also vertically downward below the side sill, creating a three-dimensional protective structure. The downward extension fills the coverage gap of conventional horizontal-only protectors, preventing collision beams from deforming into unprotected zones.
Solution Approach 2:
The protection apparatus is divided into multiple functional segments: a main body portion covering the upper side surface, a downward extension portion reaching below the side sill, and energy absorption elements distributed throughout. This segmentation allows each part to perform its specific protective function effectively.
2Reliability
If a battery pack case with triangle-shaped cross section installation frame is used, then battery pack safety during collision can be improved, but the weight of the vehicle increases due to the battery pack case, affecting fuel consumption performance
Solution Approach 1:
The protective structure is segmented into the vehicle's existing side sill (providing structural support) and the added protection apparatus main body with downward extension (providing collision protection). This segmentation allows the vehicle structure to bear part of the protective function, reducing the need for a completely separate heavy protective case.
Solution Approach 2:
The protection apparatus incorporates energy absorption elements that dynamically deform during collision to absorb impact energy. This dynamic response reduces the need for overly rigid and heavy static protective structures, optimizing the balance between safety and weight.
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 solution effectively reduces collision forces on the battery pack, enhancing protection and extending its service life by dispersing and absorbing impact energies, thereby improving safety and reducing weight-related fuel consumption issues.
Implementation Method 1
the protrusion portion and gaps between components disperse collision forces, reducing impact on the battery pack
Implementation Method 2
the protection apparatus main body moves toward the battery pack side by receiving the collision force and comes in contact with the protrusion portion
Data Source
AI summary
A battery protection apparatus provided under a side sill of a vehicle and provided at least in a side surface of a battery pack under the vehicle, includes a protection apparatus main body, wherein a protrusion portion extending downwardly is formed in the side sill of the vehicle, the protrusion portion is positioned between the protection apparatus main body and the battery pack, and in a vertical direction, the highest point of the protection apparatus main body is higher than the lowest point of the protrusion portion with respect to the horizontal plane.