Battery Electrode Lead Z-Shape Sealing Method
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Solution Overview
Problem
The existing manufacturing method for electrode leads in pouch-type rechargeable batteries is prone to fractures due to external impacts or vibrations, and the process is time-consuming and costly due to the complexity of cutting bent portions.
Innovation Solution
A method involving arranging lead pieces between two lead films, bending them to form a laminate, and sealing the bent films to create a lead piece laminate with high sealing force, which simplifies the manufacturing process and improves productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing manufacturing method for electrode leads is used, then the process is simple, but the electrode leads are prone to fractures due to external impacts or vibrations
Solution Approach 1:
The electrode lead is constructed as a composite structure with a core lead piece (first material) and an outer lead film (second material) that encases the core. This composite structure combines the properties of both materials to enhance fracture resistance while maintaining manufacturability through a sequential wrapping and sealing process.
2Productivity
If the existing manufacturing method for electrode leads is used, then the process is simple, but the process is time-consuming and costly due to the complexity of cutting bent portions
Solution Approach 1:
The invention extracts and eliminates the complex cutting step from the manufacturing process. Instead of cutting bent portions to form the electrode lead, the method uses a continuous lead film that is wrapped around the core lead piece and sealed at the ends, thereby removing the time-consuming and costly cutting operation while simplifying the overall process.
3Reliability
If lead pieces are stacked and sealed in a 'Z' shape, then sealing force is enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
The lead film is wrapped around the core lead piece in a curved, continuous manner following a 'Z'-shaped path, creating smooth transitions and rounded contours rather than sharp angles. This curved wrapping approach enhances sealing force by distributing stress evenly while maintaining manufacturing simplicity through a single continuous wrapping operation.
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 results in an electrode lead with enhanced sealing force and reduced manufacturing time and costs, as the lead pieces are stacked and sealed in a 'Z' shape, providing improved structural integrity and efficiency.
Implementation Method 1
bending the lead film to form a lead piece laminate in which the plurality of lead pieces are stacked
Implementation Method 2
sealing the bent lead film overlapping the plurality of lead pieces
Data Source
AI summary
The present invention relates to a method of manufacturing an electrode lead including: arranging a plurality of lead pieces between a first lead film and a second lead film in a length direction of a lead film including the first lead film and the second lead film; first sealing the first lead film and the second lead film; bending the lead film to form a lead piece laminate in which the plurality of lead pieces are stacked in a height direction with respect to a plane of the lead film; and second sealing the bent lead film overlapping the plurality of lead pieces.