Folded Separator Battery Cell Stacking for Faster Assembly
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Solution Overview
Problem
Existing methods for manufacturing second batteries, such as lithium ion batteries, are costly and time-consuming due to the complexity of stacking positive and negative electrodes with separators.
Innovation Solution
A method involving feeding a separator sheet through a guide assembly to fold it, inserting electrodes into the folded sheet, forming channels, and pressing the multilayered body to create a stacked battery cell with alternating electrodes, using a guide assembly, electrode supply device, side plates, raking devices, and pressing devices to streamline the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional zigzag stacking or lamination stacking methods are used to manufacture battery cells, then the battery cell can be formed with alternating positive and negative electrodes, but the manufacturing process becomes costly and time consuming
Solution Approach 1:
The electrode assembly is divided into multiple electrode packs, each containing a specific number of alternating positive and negative electrodes. This segmentation allows for modular manufacturing and assembly, improving productivity while managing complexity through standardized units
Solution Approach 2:
The method performs preliminary folding of the separator sheet and preliminary insertion of electrodes into the folded separator before final assembly. This preliminary action prepares the components in advance, reducing the complexity and time of the final stacking operation
2Ease of manufacture
If traditional battery cell stacking methods are used, then the electrodes can be arranged in alternating pattern, but the manufacturing cost increases
Solution Approach 1:
The separator sheet is continuously fed through the guide assembly while electrodes are continuously inserted into the folded separator. This continuous operation eliminates interruptions and idle time, reducing both manufacturing time and cost through efficient resource utilization
Solution Approach 2:
The method combines multiple operations into a single integrated process: folding the separator, inserting electrodes, and forming the stacked structure are performed in one continuous operation rather than as separate steps, reducing manufacturing time and cost
Data Source
AI summary
A method for stacking a battery cell includes feeding a separator sheet through a guide assembly to fold the separator sheet, inserting a plurality of first electrodes into the separator sheet at a location where the separator sheet has been folded by the guide assembly, forming respective channels in the folded separator sheet including the plurality of first electrodes, inserting a plurality of second electrodes in the respective channels to form a multilayered body, and pressing the multilayered body to form the stacked battery cell where the plurality of first electrodes and the plurality of second electrodes are stacked in an alternating arrangement.