Cutting Wire Detachment of Glued Battery Modules
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Solution Overview
Problem
Current methods for removing battery modules from the bottom of a battery pack in electric vehicles require significant traction force, risking damage to the modules and surrounding components due to their firm adhesion with thermal paste, making it difficult to detach them without causing harm.
Innovation Solution
A device comprising first and second fixed elements, such as pins, connected to a wire that slides through these elements and arranged around the module, reduces the force needed to detach the module by cutting through the filling material, using a wire that can be heated or gripped to facilitate separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal paste is used to firmly glue battery modules to the housing bottom for secure fixation during acceleration and shocks, then the reliability of module fixation is improved, but the force required to detach the modules increases significantly, risking damage to modules and surrounding components
Solution Approach 1:
The invention segments the detachment process by introducing a cutting wire that divides the continuous thermal paste layer into separate sections. The wire physically cuts through the adhesive bond, allowing the module to be detached in segments rather than requiring complete separation of the entire bonded area, thereby reducing the peak detachment force required
Solution Approach 2:
The cutting wire acts as an intermediary tool between the detachment mechanism and the bonded module. It mediates the separation process by cutting through the thermal paste layer, enabling detachment without directly applying excessive force to the module or surrounding components
2Ease of operation
If handling points are added to modules to enable application of substantial tensile force for detachment, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The invention extracts the detachment function from the module structure itself by using an external cutting wire mechanism. Instead of requiring integrated handling points on the module, the wire is applied externally to cut the adhesive bond, simplifying the module design while maintaining ease of detachment operation
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 method allows for safe and efficient detachment of battery modules from their support without damaging the module or surrounding components, reducing the risk of injury and improving maintenance accessibility.
Implementation Method 1
The tensile force to be applied to the module to be detached must be substantial in order to tear the layer of filler material that secures it to the bottom of the battery pack housing
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
The invention relates to a method and a device for detaching a module (1) from a support (2) on which it is glued using a filling material (3) comprising a first and a second fixed element (5, 6) mechanically connected to said support (2), and a wire (7) having a first end (8) mechanically connected to said first fixed element (5), connected to said second fixed element (6) so as to be able to slide through said second fixed element (6) and the part of which is situated between said first and said second fixed element (5, 6) is disposed around at least a part of said module (1) at the level of the layer of said filling material (3).