Inclined Fixing Tape for Electrode Assembly Layer Stability
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Solution Overview
Problem
The existing methods for fixing electrode assemblies using tape often result in short-circuits due to irregular folding of separators, leading to defective products in stacked type electrode assemblies.
Innovation Solution
A method involving the use of a fixing tape with an inclined intermediate section that is attached to the edges of separators, pushing and folding them to prevent contact between electrodes and maintain the relative position of layers, thereby preventing short-circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a tape is used to cover the side surface of the stacked type electrode assembly, then the relative position between layers is fixed, but the separator may fold irregularly and roll inward causing short-circuit between electrodes
Solution Approach 1:
The intermediate section of the fixing tape is disposed on the edges of separators in advance, pushing and folding them in a controlled manner before the taping process completes. This preliminary action prevents irregular folding and ensures separators are properly positioned, eliminating the risk of them rolling inward and causing short-circuits while maintaining layer stability
2Ease of manufacture
If the separator is stacked with greater length and breadth than the electrode, then the separator can be stacked on the magazine or jig, but irregular folding occurs when the side surface is pushed by tape
Solution Approach 1:
The fixing tape is designed with different sections having different functions: the intermediate section is specifically disposed on the separator edges to push and fold them precisely, while the end sections perform the general taping function. This local differentiation ensures that the separator is folded accurately at critical locations without compromising the overall stacking process
Data Source
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AI summary
The present invention relates to a method of fixing an electrode assembly to prevent layers constituting the electrode assembly from being relatively moved by using a tape. The method of fixing an electrode assembly according to an embodiment of the present invention includes a step (S10) of manufacturing the electrode assembly having a structure in which a plurality of electrodes and a plurality of separators, each of which has an area greater than that of each of the electrodes, are alternately stacked on each other, a step (S20) of disposing a fixing tape having an intermediate section, that is inclined with respect to a direction in which the electrodes and the separators are stacked, on edges of the separators, and a step (S30) of attaching the fixing tape to the electrode assembly while pushing the edges of the separators with the intermediate section of the fixing tape.