Vehicle Battery Stack Mounting to Absorb Expansion Loads
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Solution Overview
Problem
Existing power storage devices in vehicles experience loads in the up-down direction due to the expansion of stacked power storage modules, which can lead to deformation and damage.
Innovation Solution
The power storage device is designed with a housing case that includes a plate member on its upper face, bonded to the stack in regions excluding the support member, and is fixed by a linking member, creating gaps that allow the stack to expand without applying significant loads to the vehicle structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the stack is bonded to the housing case in the up-down direction, then the stack is securely fixed, but the expansion of the stack in the up-down direction generates loads that can cause deformation and damage
Solution Approach 1:
The bonding area of the plate member is divided into a first area (bonded to the stack) and a second area (not bonded to the stack). This segmentation allows the stack to expand freely in the second area while maintaining secure fixation in the first area, resolving the contradiction between fixing stability and structural strength.
Solution Approach 2:
Different regions of the plate member have different bonding characteristics. The first area provides strong bonding for stability, while the second area remains unbonded to accommodate expansion without generating harmful loads, thus preserving overall structural strength.
2Stability of the object's composition
If the housing case is restrained by the vehicle body structure, then the housing case is securely positioned, but the stack expansion transfers loads to the vehicle body structure
Solution Approach 1:
The plate member's surface is segmented into bonded and unbonded regions, creating a compliant interface that absorbs expansion forces locally without transmitting them to the vehicle body structure, thus eliminating harmful loads while maintaining positioning stability.
Solution Approach 2:
The plate member acts as an intermediary between the stack and the vehicle body structure. By strategically bonding only part of the plate member to the stack, it mediates the expansion forces, allowing them to be absorbed without being transmitted to the vehicle body structure.
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 configuration suppresses upward and downward loads on the stack, preventing deformation and damage, while also absorbing impacts and vibrations, thereby enhancing the device's durability and stability.
Implementation Method 1
the stack is bonded to the plate member in a region of the plate member excluding a region corresponding to the support member in the up-down direction
Implementation Method 2
absorbing impacts and vibrations, thereby enhancing the device's durability and stability
Data Source
AI summary
The power storage device is mounted on a vehicle. The vehicle includes a support member, and the power storage device includes a stack formed by stacking power storage modules in the up-down direction, and a housing case that houses the stack. The housing case includes a plate member that is formed so as to cover the upper surface of the stack and is located below the support member and on the upper surface of the housing case. The stack is bonded to the plate member in a region of the plate member excluding a region corresponding to the support member in the up-down direction.