Secondary Battery Lamination Apparatus with Pre-Bond Inspection
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Solution Overview
Problem
The existing lamination process for secondary batteries does not inspect electrodes before thermal bonding, leading to a high defect rate in the electrode assembly.
Innovation Solution
A lamination apparatus that includes a roller part for supplying separator and electrode sheets, a cutting part for manufacturing electrode plates, an inspection part for detecting defects using photography and comparison, and a lamination part for thermal bonding only the normal electrode plates to the separator sheet, with a discharge mechanism for removing defective plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lamination process thermally bonds separator and electrode without inspection, then the production efficiency is maintained, but the defect rate of electrode assembly significantly increases
Solution Approach 1:
The inspection part is positioned before the lamination part to perform defect detection on electrode plates before they are thermally bonded with separator sheets. This preliminary inspection prevents defective electrodes from being processed further, thereby reducing the defect rate of electrode assemblies without significantly complicating the overall process
2Reliability
If the lamination process inspects electrodes before thermal bonding, then the defect rate of electrode assembly is reduced, but the production time increases
Solution Approach 1:
The inspection part uses a camera to photograph electrode plates and an inspection device to analyze images for defects, replacing complex mechanical inspection methods with optical and computational systems. This substitution enables rapid, non-contact inspection that minimizes additional production time while effectively reducing defect rates
3Manufacturing precision
If defective electrode plates are not removed before lamination, then the production process is simple, but the quality of electrode assembly deteriorates
Solution Approach 1:
The discharge part is configured to remove defective electrode plates from the production line before they reach the lamination process. This extraction of defective components ensures that only qualified electrode plates are thermally bonded with separator sheets, maintaining high manufacturing precision while keeping the overall process straightforward
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
Significantly reduces the defect rate of the electrode assembly by inspecting and removing defective electrode plates before thermal bonding, ensuring accurate defect detection and maintaining uniform transfer intervals.
Implementation Method 1
a lamination part that thermally bonds the normal electrode plate transferred by the second transfer part to the separator sheet supplied by the separator supply roller
Implementation Method 2
an inspection part that inspects whether the electrode plates transferred by the first transfer part are defective
Data Source
AI summary
A lamination apparatus for a secondary battery comprises a roller part comprising a separator supply roller that supplies a separator sheet and an electrode supply roller that supplies an electrode sheet, a cutting part that cuts the electrode sheet supplied by the electrode supply roller to manufacture a plurality of electrode plates, a first transfer part that transfers the electrode plates cut by the cutting part at a same interval, an inspection part that inspects whether the electrode plates transferred by the first transfer part are defective, a second transfer part that transfers a normal electrode plate, which is determined as the normal electrode plate by the inspection part, among the electrode plates, and a lamination part that thermally bonds the normal electrode plate transferred by the second transfer part to the separator sheet supplied by the separator supply roller.