Battery Module Bonding Layout for Easier Pack Disassembly
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Solution Overview
Problem
The maintainability of electric storage apparatuses is compromised due to the use of adhesive members to distribute surface pressures between battery cells and the case, leading to difficulties in disassembly and maintenance.
Innovation Solution
Incorporation of wire rods with insulation properties that overlap and are in contact with adhesive members, allowing for easy disassembly by cutting the adhesive, combined with surface pressure dispersion members and load receiving members to distribute loads evenly across battery cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive members are used to bond the surface pressure dispersion member to the battery module and case, then the bonding strength and structural integrity are improved, but the maintainability and ease of disassembly deteriorate
Solution Approach 1:
The adhesive member is segmented by the wire rod into multiple regions, creating discrete bonding zones. This segmentation allows the adhesive to be cut and separated easily, enabling disassembly while maintaining bonding strength during operation. The wire rod acts as a pre-positioned separation line that facilitates future maintenance without compromising the original bonding integrity.
Solution Approach 2:
The wire rod serves as an intermediary element embedded within the adhesive member. It provides a mechanical separation interface that allows the adhesive bond to be cleanly divided during disassembly. The wire rod mediates between the need for strong bonding and the need for easy maintenance by providing a predetermined weak point for separation.
2Stress or pressure
If adhesive members are used to distribute surface pressure to the battery module, then the load distribution is improved, but the ease of disassembly for maintenance deteriorates
Solution Approach 1:
The adhesive member is divided into multiple bonding regions by the wire rod, creating separable zones that maintain load distribution functionality while enabling easy disassembly. Each segmented region can independently contribute to pressure distribution while the wire rod provides a clear separation path for maintenance operations.
Solution Approach 2:
The wire rod is pre-positioned within the adhesive member during assembly, establishing a predetermined separation line before disassembly is needed. This preliminary placement of the wire rod ensures that when maintenance is required, the adhesive can be easily cut and separated along the wire rod's path without requiring complex disassembly procedures.
3Reliability
If the wire rod is disposed inside the adhesive member, then the insulation property and short-circuit prevention are improved, but the device complexity increases
Solution Approach 1:
The wire rod performs multiple functions simultaneously: it provides mechanical separation of the adhesive member for disassembly, serves as an insulation barrier to prevent short-circuits between the battery module and case, and acts as a positioning element during assembly. By combining these functions into a single component, the overall device complexity is minimized while achieving multiple benefits.
Solution Approach 2:
The insulation function and mechanical separation function are merged into a single wire rod element. Instead of adding separate insulation components and separation features, the wire rod combines both functionalities, reducing the number of parts and simplifying the overall structure while maintaining reliability and maintainability.
Data Source
AI summary
An electric storage apparatus which contributes to the improvement of maintainability of the inside of the electric storage apparatus is provided. An electric storage apparatus according to the present disclosure includes: a battery module including a plurality of battery cells; a case configured to house at least a part of the battery module; an apparatus component positioned between the battery module and the case; and an adhesive member configured to bond the apparatus component to the battery module, in which the electric storage apparatus includes a wire rod including a first part disposed inside the electric storage apparatus and a second part disposed outside the electric storage apparatus.