Battery Separator Winding Alignment Using Suction Attachment
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Solution Overview
Problem
The challenge in manufacturing batteries lies in the misalignment of separators during the winding process, leading to increased waste and reduced productivity due to the use of separators with substrate and surface layers, which are expensive.
Innovation Solution
A method involving suction-attaching first and second separators with porous substrate layers and surface layers containing polyvinylidene fluoride (PVdF) and inorganic particles to a winding core, followed by winding them around the core with the substrate layers facing each other and pressing them using a jig with protrusions to enhance alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separators with substrate layers and surface layers are used, then separator performance and reliability are improved, but manufacturing cost increases and productivity decreases due to misalignment during winding
Solution Approach 1:
The separator tips are stuck to the winding core in advance before the winding process begins. This preliminary attachment ensures that the separators are properly positioned and aligned at the start, preventing misalignment during winding and reducing the need to discard expensive separators with substrate and surface layers.
2Reliability
If separators with substrate layers and surface layers are used, then separator performance is improved, but manufacturing cost increases
Solution Approach 1:
The separator tips are stuck to the winding core in advance before the winding process begins. This preliminary attachment ensures that the separators are properly positioned and aligned at the start, preventing misalignment during winding and reducing the need to discard expensive separators with substrate and surface layers.
3Ease of manufacture
If simple winding method is used, then manufacturing cost is reduced, but separator misalignment occurs reducing productivity
Solution Approach 1:
The separator tips are stuck to the winding core in advance before the winding process begins. This preliminary attachment ensures that the separators are properly positioned and aligned at the start, preventing misalignment during winding and reducing the need to discard expensive separators with substrate and surface layers.
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 approach improves the productivity of wound electrode assembly manufacturing by reducing misalignment and minimizing the disposal of separators, thereby enhancing efficiency and cost-effectiveness.
Implementation Method 1
suction-attaching a first separator and a second separator to a winding core
Data Source
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AI summary
A disclosed method of manufacturing a battery includes the steps of: (A) suction-attaching a first separator and a second separator to a winding core, with the first separator and the second separator being stacked on each other; and (B) winding the first separator and the separator around the winding core. Each of the first separator and the second separator includes a porous substrate layer made of resin, and at least one surface layer formed on at least one surface of the substrate layer.