Vehicle Side Rocker Structure with Dynamic Movement Permitting Portions
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Solution Overview
Problem
Existing vehicle side collision protection technologies are inadequate in absorbing collision energy when a large battery is installed, leading to insufficient stroke for energy absorption and potential damage to the battery during side collisions with objects like poles.
Innovation Solution
A vehicle side portion structure featuring rockers that extend along the vehicle's longitudinal direction, a battery positioned between them, and movement permitting portions that allow the second rocker to move outward when a collision load exceeds a set load, reducing the reaction force on the battery and enhancing energy absorption through impact absorbing portions and joined rocker sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the battery is made large to increase power supply capacity, then the battery space in the vehicle transverse direction becomes large, but the gaps between the battery and the rockers become narrow, resulting in insufficient stroke to absorb collision energy
Solution Approach 1:
The rocker is designed with a movement permitting portion that allows dynamic movement when collision load exceeds a set load. This enables the rocker to move outward during side collisions, creating additional stroke for energy absorption even when the battery is large and gaps are narrow. The dynamic capability resolves the contradiction between battery size and collision energy absorption capacity.
2Volume of moving object
If the battery is made large, then the battery occupies more space, but the stroke for absorbing collision energy is insufficient due to narrow gaps between battery and rockers
Solution Approach 1:
The movement permitting portion enables the rocker to dynamically adjust its position during collision events. When collision load exceeds the set load, the rocker moves outward, effectively increasing the stroke length for energy absorption without requiring additional space that would reduce battery volume.
3Reliability
If collision load is transmitted to the battery, then the battery may be damaged, but without movement permitting portions, the collision energy cannot be effectively absorbed
Solution Approach 1:
The movement permitting portion acts as an intermediary mechanism between the rocker and the battery. It allows controlled movement of the rocker outward during collision, enabling energy absorption through the movement itself rather than direct transmission to the battery, thus protecting the battery while absorbing collision energy.
Solution Approach 2:
The movement permitting portion is designed to activate when collision load exceeds a predetermined set load. This beforehand-designed mechanism ensures that when a collision occurs, the rocker can immediately begin moving outward to absorb energy, preventing excessive force from being transmitted to the battery before the cushioning action begins.
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 protects the battery by reducing collision loads and improving energy absorption, ensuring the battery's safety during side collisions, even with large batteries, and maintaining the battery's volume without compromising its size.
Implementation Method 1
movement permitting portions that, when, at a time of a side collision of the vehicle, a collision load that is greater than or equal to a set load that is set in advance is inputted to a second rocker positioned at a side opposite from a first rocker
Implementation Method 2
impact absorbing portions that deform due to input of the collision load and absorb collision energy
Data Source
AI summary
Joining members 56 are provided that permit a rocker lower 22 moving toward a vehicle outer side at least along a direction of input of side collision load F when, at a time of a side collision of a vehicle 10, side collision load F′ that is greater than or equal to a set load that is set in advance is inputted to a rocker 16. Namely, in a case in which the side collision load F′ that is greater than or equal to the set load is transmitted from a battery pack 20 to the rocker 16, the rocker lower 22 moves toward the vehicle outer side. Therefore, reaction force that the battery pack 20 receives from the rocker 16 is reduced, and collision load that is inputted to the battery pack 20 side is decreased.