Vehicle Energy Store Adhesive Structure for Cell Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrical energy stores in motor vehicles, where energy storage cells are adhesively bonded to the housing, pose challenges for analysis, recycling, and maintenance due to the difficulty in separating the cells from the housing.
Innovation Solution
An electrical energy store design featuring a housing with an adhesive bond that is weakened or detachable in specific areas, allowing for non-destructive separation of the energy storage cells from the housing, facilitated by a separating layer between adhesive layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the energy storage cells are adhesively bonded to the housing, then the structural integrity and force transmission are improved, but the ease of separation for recycling and maintenance deteriorates
Solution Approach 1:
The adhesive bond is segmented into multiple layers (first adhesive layer, separating layer, second adhesive layer) with different properties. The separating layer has weakened adhesion compared to the other layers, creating a predetermined separation path that allows easy detachment while maintaining overall bond strength during normal operation.
Solution Approach 2:
A separating layer is introduced as an intermediary element between the first and second adhesive layers. This separating layer acts as a mediator that provides strong bonding on both sides while having intentionally weakened adhesion at its interface, enabling controlled separation for recycling and maintenance without compromising the overall structural integrity during use.
2Ease of operation
If the adhesive bond is made detachable, then the ease of recycling and cell exchange is improved, but the structural stability under normal conditions deteriorates
Solution Approach 1:
Different regions of the adhesive bond have different adhesion qualities. The first and second adhesive layers provide strong local bonding to ensure structural stability, while the separating layer provides a localized weak bond that enables easy separation. This local differentiation of bond strength allows the system to simultaneously achieve both structural stability and ease of recycling.
Solution Approach 2:
The separating layer is pre-positioned between the adhesive layers during assembly, creating a predetermined separation path before the product is put into service. This preliminary arrangement ensures that when recycling or maintenance is needed, the separation will occur cleanly along the pre-designed path without damaging the housing or cells.
3Ease of repair
If a separating layer is introduced to weaken the adhesive bond, then the ease of separation is improved, but the device complexity increases
Solution Approach 1:
The separating layer is implemented as a thin film or layer with controlled properties rather than a complex mechanical structure. This thin film approach adds minimal complexity to the adhesive bond system while effectively providing the predetermined separation path. The separating layer can be applied as a coating or thin sheet during the manufacturing process, integrating smoothly into the existing adhesive bonding workflow.
Data Source
AI summary
An electrical energy store, comprising a housing in which a unit made up of energy storage cells is located, at least some of the housing being fastened to the unit by means of an adhesive bond, and the adhesive bond being at least selectively weakened or releasable.