Wound Electrode Separator Fixation Without Terminal Stop Tape
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Solution Overview
Problem
The configuration of electrode production apparatuses for wound electrode bodies is complicated by the need for winding terminal stop tapes, making the production process less simple and convenient.
Innovation Solution
A battery design that includes a wound electrode body with a first and second separator, where the second separator has an extending portion beyond the winding terminal edge of the first separator, with a second adhesive layer on its inner surface, allowing the winding terminal edge to be fixed without a stop tape, simplifying the production process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a winding terminal stop tape mechanism is used to fix the separator, then the separator can be securely fixed to the wound body, but the electrode production apparatus configuration becomes complicated
Solution Approach 1:
The invention extracts and eliminates the winding terminal stop tape mechanism from the electrode production apparatus. Instead of using an external stop tape device, the separator itself is designed with an extending portion that protrudes beyond the winding terminal edge of the first separator, allowing the separator to self-fix without requiring additional fixation mechanisms.
Solution Approach 2:
The separator structure performs its own fixation function through the extending portion that extends beyond the winding terminal edge. This self-service mechanism eliminates the need for external stop tape devices, as the separator's own structural feature (the extending portion) provides the fixation capability that would otherwise require a separate mechanism.
2Reliability
If a winding terminal stop tape is used to fix the separator, then the separator can be securely fixed, but the production process becomes less simple and convenient
Solution Approach 1:
The invention removes the winding terminal stop tape from the production process. The separator's extending portion naturally provides the fixation function, eliminating the need for stop tape application steps and simplifying the overall manufacturing process.
Solution Approach 2:
The separator structure itself provides the fixation function through its extending portion, eliminating the need for external stop tape materials and the associated application processes. This self-service approach simplifies manufacturing by reducing the number of components and steps required.
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 design enables the production of wound electrode bodies in a more straightforward and efficient manner by eliminating the need for complex terminal stop tape mechanisms, improving the ease and convenience of the electrode body production process.
Implementation Method 1
a second adhesive layer is existed at least on a part of an inner surface of the extending portion; and the extending portion and a region positioned inward from the extending portion in the second separator are bonded via the second adhesive layer
Data Source
AI summary
Provided is a technique that can obtain a wound electrode body simply and conveniently. One aspect of a battery herein disclosed is provided with a wound electrode body in which a positive electrode and a negative electrode are wound around in a predetermined winding direction around a winding axis via a separator. The battery includes a first separator and a second separator as the separator; the second separator includes a region positioned outward from an winding terminal edge of the first separator; the second separator includes an extending portion extending beyond a winding terminal edge of the first separator in the winding direction; a second adhesive is existed at least on a part of an inner surface of the extending portion; and the extending portion and a region positioned inward from the extending portion in the second separator are bonded via the second adhesive layer.