Serpentine Separator Secondary Battery Manufacturing
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Solution Overview
Problem
The existing methods for manufacturing secondary batteries, such as stacked type electrode assemblies, are inefficient due to long production times and the need for additional adhesive materials, which reduces production efficiency.
Innovation Solution
A method and apparatus for manufacturing secondary batteries that involve unwinding and bending serpentine-shaped separators with electrode plates, allowing for efficient stacking and separation of electrodes without the need for additional adhesives, using clamping units to manage the placement and bending of separators and electrodes, thereby reducing operation time and increasing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If stacked type electrode assemblies are manufactured by sequentially stacking separator and electrode plates, then electrode assembly can be formed, but production time is long and production efficiency is low
Solution Approach 1:
The separator is pre-formed in a serpentine shape with protruding portions and grooves before electrode plates are attached. This preliminary configuration allows electrode plates to be quickly positioned and fixed without requiring sequential stacking operations, thereby reducing production time and improving production efficiency
2Ease of manufacture
If additional adhesive material is used to assemble electrode plates and separator, then electrode assembly can be formed, but device complexity and manufacturing complexity increase
Solution Approach 1:
The separator's serpentine structure with protruding portions and grooves enables self-alignment and self-fixing of electrode plates. The mechanical interlocking feature allows electrode plates to be securely attached without additional adhesive materials, simplifying the manufacturing process and reducing assembly complexity
Data Source
AI summary
A secondary battery includes a first electrode assembly comprising a first separator in a serpentine form and first and second electrode plates that are respectively located on two surfaces of the first separator at different positions; and a second electrode assembly comprising a second separator in a serpentine form and third and fourth electrode plates that are respectively located on the second separator at different positions, wherein the first separator, to which the first and second electrode plates are combined, is bent with respect to ends of the first and second electrode plates so that the portion of the first separator is located on the second separator, and the second separator, on which the third and fourth electrode plates are combined, is bent with respect to ends of the third and fourth electrode plates so that the portion of the second separator is located on the first separator.