Battery Tray Electronic Unit Mount With Force-Limited Retention
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Solution Overview
Problem
In motor vehicles, the rigid fixation of electronic boxes to battery trays poses a safety risk during frontal impacts, as the recoil of the battery and its tray can push the electronic box into the passenger compartment, potentially causing injury by intruding into the hydraulic system and pedals.
Innovation Solution
A motor vehicle design featuring an electronic box linked to a support fixed on the side face of the battery tray, with wedging devices allowing easy vertical descent and limited retaining force, preventing excessive force transmission to the hydraulic system during impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic box is rigidly fixed to the battery tray, then the electronic box is securely held in position, but during frontal impact the battery tray can push the electronic box into the passenger compartment causing injury
Solution Approach 1:
The patent changes the mechanical parameter of the fixation system by introducing a force limit (50daN) that transforms the rigid connection into a controlled compliance mechanism. The wedging devices are designed with specific geometric parameters that allow controlled movement when the retention force exceeds the threshold, preventing harmful intrusion while maintaining secure fixation under normal conditions.
2Stability of the object's composition
If the support is rigidly attached to the battery tray, then the electronic box remains stable during normal operation, but the hydraulic system can be damaged during impact
Solution Approach 1:
The patent introduces wedging devices as intermediary elements between the support and the battery tray. These intermediaries normally provide stable fixation but act as force-limiting mediators during impact, allowing controlled movement when the force exceeds 50daN to protect the hydraulic system while maintaining stability during normal operation.
3Ease of operation
If the support is easily installable by vertical descent, then the installation process is simplified, but the support must allow movement in forward direction during impact
Solution Approach 1:
The patent segments the fixation function into two independent mechanisms: wedging devices for easy vertical installation and hooks for securing the support in position. This segmentation allows the installation mechanism to provide ease of operation while the hook mechanism ensures reliable protection against impact force transmission by preventing excessive forward movement.
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
This design effectively prevents the intrusion of the hydraulic system and pedals into the passenger compartment by limiting the force applied to the hydraulic system, ensuring driver safety during frontal impacts.
Implementation Method 1
the support has a front edge resting on the vertical boss having elasticity in the longitudinal direction of the vehicle
Implementation Method 2
the support comprises lower edges having elasticity in the vertical direction, coming to bear on horizontal bosses of the lateral face of the tray at the end of descent
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Disclosed is a motor vehicle equipped with an electronic unit (12) connected to a support (10) fastened to a lateral face (8) of a battery tray (2) of the on-board network (4), which lateral face (8) faces the transverse direction of the vehicle, this lateral face (8) having devices for wedging the support (10) in all directions, allowing this support (10) to be lowered from above, and applying, in the forward direction of the vehicle, a limited force of less than 50 daN for retaining the support (10).