Battery Unit Frame Anchoring for Crash Energy Absorption
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Solution Overview
Problem
Existing battery mounting arrangements in electric vehicles fail to effectively absorb crash forces during accidents, risking battery intrusion into the passenger compartment and potential damage, which can lead to fire or electrical discharges endangering occupants.
Innovation Solution
A holding arrangement with a frame structure anchoring the battery unit to a deformation-stable heel plate, utilizing tension struts and a deformable zone to absorb inertial forces without excessive deformation, preventing battery displacement and minimizing mechanical damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the battery unit is flexibly mounted to allow energy absorption during collision, then the holding arrangement can absorb impact energy, but the battery may intrude into the passenger compartment
Solution Approach 1:
The holding arrangement is segmented into a rigid frame structure for positional stability and separate deformation elements positioned between the battery and frame for energy absorption. This segmentation allows the system to simultaneously maintain battery position stability while absorbing impact energy through the deformation elements.
Solution Approach 2:
Deformation elements are introduced as intermediary components between the battery unit and the rigid frame structure. These intermediaries absorb impact energy through controlled deformation while preventing direct force transmission that would cause battery intrusion into the passenger compartment.
2Force
If the battery unit is rigidly anchored to withstand high forces, then the holding arrangement can resist inertial forces, but the battery may be damaged releasing stored energy
Solution Approach 1:
The deformation elements are pre-positioned between the battery unit and the rigid frame structure to provide cushioning before impact occurs. During collision, these elements deform to absorb energy, reducing the peak forces transmitted to the battery while preventing excessive deformation that would damage the battery.
Solution Approach 2:
The holding arrangement utilizes parameter changes in the deformation elements during impact - transitioning from a rigid state during normal operation to a deformable state during collision. This allows the system to resist inertial forces while controlling the deformation parameters to prevent battery damage.
3Loss of energy
If deformation elements are used to absorb impact energy, then energy dissipation occurs, but the battery can be displaced by inertial forces
Solution Approach 1:
The holding arrangement segments the energy absorption function (deformation elements) from the positional stabilization function (rigid frame structure). The deformation elements dissipate energy while the rigid frame maintains battery position stability, preventing displacement during impact.
Solution Approach 2:
The system merges the deformation elements for energy absorption with the rigid frame structure for positional stability into a unified holding arrangement. This combination allows simultaneous energy dissipation and prevention of battery displacement during collision.
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 provides enhanced crash safety by preventing battery intrusion and damage, ensuring occupant safety by effectively absorbing crash forces and stabilizing the battery unit against deformation and displacement during accidents.
Implementation Method 1
The at least one tension strut (38) is designed to absorb forces generated in the event of an accident
Implementation Method 2
the frame structure of the holding arrangement comprises at least one holding element, via which the part of the battery unit arranged in the deformable zone of the body is anchored to a deformation-stable structural area of the body
Implementation Method 3
Impact energy occurring in a frontal collision is to be introduced via the dimensionally stable rear end into longitudinally deformable deformation elements of the rear vehicle area arranged at the rear and converted there into deformation work
Data Source
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AI summary
The invention relates to a battery unit (24) support arrangement on the body of a passenger vehicle (10), in which at least one part of the battery unit (24) is arranged in a deformable area (26) of the body and said battery unit (24) is supported on a corresponding structural area (40) of the body by means of a frame structure (32). Said frame structure (32) comprises at least one support element (34, 38) by means of which the part of the battery unit (24) arranged in the deformable area (26) of the body is anchored to a deformation-stable structural area (40) of the body. Said deformation-stable structural area (40) is arranged in a rigid area (30) of the body.