Vehicle Battery Pack Cell Fixation With Buffer-Supported Adhesive
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Solution Overview
Problem
Existing electricity storage devices rely heavily on adhesive materials to fix electricity storage cells, necessitating a reduction in adhesive usage while maintaining effective cell fixation.
Innovation Solution
The use of buffer members disposed between the upper case and the floor panel, with adhesive material applied to the cells, and protruding portions on the floor panel to enhance cell fixation without increasing adhesive usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive material is used to fix electricity storage cells, then cell fixation is achieved, but adhesive material usage amount increases
Solution Approach 1:
The invention divides the fixation function into multiple components: restraint bands for primary mechanical constraint and adhesive material for secondary bonding. This segmentation allows each component to perform its specific function efficiently, reducing the overall adhesive material needed while maintaining reliable cell fixation.
Solution Approach 2:
The restraint band acts as an intermediary between the cell stack and the mounting structure, providing mechanical support and reducing the burden on the adhesive material. The adhesive material then serves as a secondary intermediary to secure the restraint band and cells together, allowing for reduced adhesive usage while maintaining fixation reliability.
2Quantity of substance
If adhesive material is reduced, then adhesive material usage amount decreases, but cell fixation reliability may worsen
Solution Approach 1:
The restraint band is installed first to provide preliminary mechanical constraint and structural support to the cell stack. This preliminary action creates a stable foundation that reduces the amount of adhesive material needed to achieve reliable fixation, as the adhesive only needs to secure the pre-positioned restraint band rather than holding the entire cell stack.
Solution Approach 2:
The invention changes the fixation mechanism from relying solely on adhesive material to a combined mechanical-adhesive system. By introducing the restraint band with specific elastic properties and mounting structures, the system parameters are changed to distribute fixation loads, allowing reduced adhesive material usage while maintaining or improving fixation reliability.
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
Reduces adhesive material usage while ensuring secure cell fixation, preventing separation of cells from the adhesive, even with reduced amounts.
Implementation Method 1
an adhesive material provided on an upper surface of the at least one electricity storage cell, the adhesive material causing the at least one electricity storage cell to adhere to the upper case
Data Source
AI summary
An electricity storage device is to be disposed below a floor panel of a vehicle. The electricity storage device includes at least one electricity storage cell, an accommodation case that includes an upper case and accommodates the at least one electricity storage cell, an adhesive material provided on an upper surface of the at least one electricity storage cell, the adhesive material causing the at least one electricity storage cell to adhere to the upper case, and at least one buffer member disposed between the upper case and the floor panel and also disposed above the adhesive material.