Pouch Case Sealing Jigs That Prevent Terrace Protrusion
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Solution Overview
Problem
Conventional pouch sealing devices for battery cells result in the pouch terrace protruding, creating unnecessary dead space and reducing energy density and assembly efficiency.
Innovation Solution
A pouch case sealing apparatus with anti-protruding guide projections and grooves on sealing jigs that prevent the pouch terrace from protruding by bending it inward during the sealing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pouch sealing device presses and thermally fuses the pouch terrace, then the pouch case is sealed, but the end portion of the pouch terrace protrudes out of the pouch body forming dead space
Solution Approach 1:
The anti-protruding guide projection is provided on the sealing jig before the sealing process to prevent the pouch terrace from protruding in the first place. This preliminary constraint structure guides the pouch terrace material during pressing, ensuring it bends inward along the predetermined path rather than protruding outward, thus eliminating dead space while maintaining sealing quality
Solution Approach 2:
The invention introduces a new dimensional constraint by adding the anti-protruding guide projection that extends in the direction perpendicular to the pressing direction. This projection creates a three-dimensional guiding path that controls the pouch terrace movement, forcing it to bend inward along the guide surface rather than moving freely in the horizontal direction, thereby preventing protrusion
2Productivity
If conventional pouch sealing device seals three surfaces of pouch body, then space utilization is improved, but protruding portion creates unnecessary dead space lowering energy density
Solution Approach 1:
The anti-protruding guide projection prevents the formation of dead space by constraining the pouch terrace to bend inward during sealing. This eliminates unnecessary protruding portions that would otherwise create empty spaces in the battery module, thereby maximizing the quantity of active materials that can be packed into the same volume and improving energy density
Solution Approach 2:
The invention changes the geometric parameters of the pouch terrace by introducing a predetermined bending path through the anti-protruding guide projection. This modifies the final shape and position of the pouch terrace, ensuring it fits tightly within the pouch body boundaries, thus optimizing the volume utilization and energy density of the battery cell
3Reliability
If pouch terrace is pressed and thermally fused, then sealing is achieved, but protruding portion interferes with neighboring components
Solution Approach 1:
The anti-protruding guide projection is designed to prevent the pouch terrace from protruding beyond the pouch body boundaries during the sealing process. By providing this preliminary constraint, the invention ensures that the sealed pouch terrace remains within the designated space, eliminating interference with neighboring battery components while maintaining effective sealing strength
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
Prevents pouch terrace protrusion, enhancing energy density and assembly efficiency by eliminating dead space and reducing interference with neighboring components.
Implementation Method 1
a pair of sealing jigs configured to press and thermally fuse the pouch terrace in upper and lower directions of the pouch terrace
Data Source
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AI summary
Disclosed is a pouch case sealing apparatus for sealing a pouch case that includes a pouch body for accommodating an electrode assembly of a battery cell and a pouch terrace extending from the pouch body. The pouch case sealing apparatus includes: a pair of sealing jigs configured to press and thermally fuse the pouch terrace in upper and lower directions of the pouch terrace so that the pouch case is sealed; and a terrace anti-protruding unit formed at a pressing surface of the pair of sealing jigs to prevent an end portion of the pouch terrace from protruding out of the pouch body in a horizontal direction of the pouch body when the pouch terrace is pressed and thermally fused.