Battery Retaining Device Actuator Dynamics Collision Decoupling
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Solution Overview
Problem
Existing solutions for securing vehicle batteries during collisions do not effectively manage the temporal deceleration profile of the battery, which can lead to increased risk of injury to passengers and damage to the battery.
Innovation Solution
A battery retaining device with a guide device and actuator system that selectively changes the structural integrity or position of retaining elements, allowing the battery to decouple from the vehicle body during high deceleration events, thereby influencing the acceleration profile and reducing loads on both the battery and passengers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the battery is rigidly retained to the vehicle body, then the battery is securely fixed during normal operation, but the acceleration forces on the battery and passengers increase during collision
Solution Approach 1:
The retaining element transitions from a static rigid connection to a dynamic system that can change its mechanical coupling state. The actuator system enables the retaining element to switch between a first operating state (rigid retention) and a second operating state (reduced structural integrity), allowing the system to adapt to different operational conditions and minimize acceleration forces during collision.
Solution Approach 2:
The system changes the mechanical coupling parameter between the battery and vehicle body by actuating the retaining element. The actuator system modifies the structural integrity of the retaining element, transitioning it from a high-retention state during normal operation to a low-retention state during collision, thereby controlling the acceleration profile of the battery.
2Quantity of substance
If the battery mass is increased for high storage capacity, then the cruising range is extended, but the shear force on the vehicle body during collision increases
Solution Approach 1:
The system allows the heavy battery mass to be dynamically decoupled from the vehicle body during collision through the actuator-controlled retaining element. This enables the battery to follow its own movement trajectory during impact, preventing the transmission of high shear forces to the vehicle body while maintaining the necessary high storage capacity for extended cruising range.
3Force
If the retaining element structural integrity is reduced to allow battery movement during collision, then the acceleration forces are reduced, but the battery retention stability during normal operation is compromised
Solution Approach 1:
The actuator system enables dynamic control of the retaining element's structural integrity, switching between a first operating state with high retention stability for normal operation and a second operating state with reduced structural integrity for collision scenarios. This allows the system to optimize both retention stability and acceleration force management at different times.
Solution Approach 2:
The actuator system is activated in advance before collision occurs, transitioning the retaining element from its normal retention state to a reduced-integrity state in preparation for the upcoming impact. This preliminary action ensures that the battery is properly positioned and the retention forces are optimized before the collision event occurs.
Data Source
AI summary
The invention relates to a battery retaining device, comprising a guide device which is designed to receive a vehicle battery; at least one retaining element which is designed to rigidly retain a vehicle battery received in the guide device in a mechanical manner up to a first maximum retaining force value in a first operating state and to rigidly retain the vehicle battery received in the guide device in a mechanical manner up to a second maximum retaining force value in a second operating state; and an actuator system with at least one actuator which is designed to bring the at least one retaining element from the first operating state to the second operating state.