Cylindrical Battery Tape Attachment for Edge Insulation Coverage
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Solution Overview
Problem
Secondary batteries face a risk of electrical shorts due to uninsulated portions on the insulating plate, which can cause the positive electrode to contact the case functioning as the negative electrode.
Innovation Solution
A tape attaching device and method that includes a lower support structure, compression jigs to bend and attach insulating tape to the electrode assembly, and a pressing device to flatten the tape, minimizing the risk of electrical shorts by ensuring complete insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insulating plate is used to electrically insulate the positive electrode and negative electrode, then electrical insulation is improved, but uninsulated portions may remain on the outer portion of the insulating plate causing potential electrical shorts
Solution Approach 1:
The patent uses a flexible insulating tape instead of a rigid insulating plate. The tape can be wrapped around and bent to conform to the cylindrical electrode assembly, ensuring complete coverage of the outer surface without leaving uninsulated portions. This flexible film approach eliminates the coverage gaps that occur with rigid plates.
Solution Approach 2:
The patent transitions from a two-dimensional insulating plate to a three-dimensional wrapped tape configuration. The insulating tape is wrapped around the cylindrical electrode assembly in multiple layers, providing coverage in all directions and eliminating the possibility of uninsulated portions that exist with flat plate configurations.
2Reliability
If compression jigs are used to bend and attach insulating tape to the electrode assembly, then insulation coverage is improved, but the device complexity increases
Solution Approach 1:
The patent divides the compression mechanism into multiple independent compression jigs positioned at different locations around the electrode assembly. Each jig independently applies compression to secure a portion of the insulating tape, allowing for simpler individual components that collectively achieve complete coverage without requiring a complex monolithic mechanism.
3Reliability
If the insulating tape is bent and attached to the upper surface of the electrode assembly, then electrical short prevention is improved, but the manufacturing process complexity increases
Solution Approach 1:
The patent applies preliminary compression to the insulating tape during the attachment process. The compression jigs pre-compress and secure the tape to the electrode assembly before final assembly, ensuring proper adhesion and positioning in advance. This preliminary action simplifies the overall manufacturing process by preventing positioning issues that would require complex adjustments later.
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
The solution effectively prevents or minimizes the risk of electrical shorts by ensuring the insulating tape completely surrounds the edge of the electrode assembly, enhancing the ease of insertion and preventing substrate exposure.
Implementation Method 1
a plurality of compression jigs configured to bend an insulating tape attached to a side surface of the electrode assembly and protruding in a height direction along a circumference of an upper surface of the electrode assembly
Implementation Method 2
a pressing device configured to flatten the upper surface of the electrode assembly to which the insulating tape is attached
Data Source
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AI summary
A tape attaching device (200) including: a lower support structure (210) to support a cylindrical electrode assembly (110); a plurality of compression jigs (220) to bend an insulating tape (120) attached to a side surface (112) of the electrode assembly (110) and protruding in a height direction along a circumference of an upper surface (114) of the electrode assembly (110), and attach the insulating tape (120) to the upper surface (114) of the electrode assembly (110); a pressing device (230) to flatten the upper surface (114) of the electrode assembly (110) to which the insulating tape (120) is attached; and a controller (240) to control the compression jigs (220) and the pressing device (230).