Battery Pack Housing Structure to Prevent Cell Adhesion Release
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The adhesion between a battery cell and a case in a battery pack can be released due to vibration, posing a risk of separation.
Innovation Solution
A housing case configuration with a protruding portion on a second case that abuts against the battery cells, pressing them against a first case, and using adhesive members at specific locations to secure bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive members are used to bond battery cells to the case, then bonding strength is improved, but adhesion may be released under vibration
Solution Approach 1:
The housing case is divided into a first case and a second case, with the protruding portion created as a separate structural element on the second case. This segmentation allows the pressing function to be structurally integrated rather than relying solely on adhesive bonding, preventing adhesion release under vibration.
Solution Approach 2:
The protruding portion integrates the pressing function directly into the housing case structure. By combining the bonding function (adhesive members) with the pressing function (protruding portion geometry), the system achieves both strong initial bonding and vibration resistance through mechanical constraint.
2Reliability
If protruding portion presses battery cells against first case, then adhesion stability is improved, but manufacturing complexity increases
Solution Approach 1:
The protruding portion is integrated directly into the second case structure rather than being a separate component. This merging of functions (housing + pressing) into a single structural element minimizes additional complexity while achieving stable adhesion under vibration.
Solution Approach 2:
The second case serves multiple functions: it provides housing for the battery cells and simultaneously creates the protruding portion that presses the cells against the first case. This multi-functionality reduces the need for additional separate pressing components, maintaining manufacturing simplicity.
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
The configuration effectively prevents the release of adhesion between the battery cells and the case, ensuring stable bonding even under vibrational stress.
Implementation Method 1
The protruding portion of the second case protrudes toward the first case and abuts against the power storage units. The electric power storage units are pressed toward the first case by the protruding portion of the second case
Implementation Method 2
The electric power storage units are bonded to the first case with an adhesive member
Data Source
AI summary
An electric power storage device includes a plurality of electric power storage units and a housing case. The electric power storage units are arranged in an X direction and laminated in the X direction. Lower surfaces of the electric power storage units are bonded to a lower case with an adhesive member. A protruding portion extending in the X direction is formed in an upper case. The protruding portion protrudes toward the lower case and abuts against an upper surface of the electric power storage units. As a result, the electric power storage units receive a load on the adhesive member side (lower case side) and are pressed down.