Electrode Stack Taping with Balanced Tension for Salt Extraction Prevention
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Solution Overview
Problem
Existing electrode stack taping methods fail to provide sufficient adhesion and fixing force, leading to salt extraction issues in secondary batteries.
Innovation Solution
An electrode stack taping method and device that includes a support tool, unit heads, blades, and rollers to apply tension and adhere tapes to the lateral sides of the electrode stack, ensuring centered tension direction to enhance adhesion and fixing force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional taping methods are used, then the process is simple, but adhesion and fixing force are insufficient leading to salt extraction
Solution Approach 1:
The taping device is divided into multiple independent functional modules: upper and lower unit heads for tension application, support tools for positioning, blades for lateral side adhesion, and rollers for securing. Each module performs a specific function, allowing the system to achieve high adhesion force through coordinated action while maintaining manageable complexity through modular design
Solution Approach 2:
The patent applies tape in multiple dimensions: vertically from upper and lower sides, laterally along the sides, and horizontally across the top surface. This multi-dimensional taping approach ensures comprehensive coverage and maximum fixing force on all electrode plates, preventing salt extraction by securing electrodes from multiple directions simultaneously
2Reliability
If tension is applied to enhance adhesion, then fixing force increases, but electrode stack deformation may occur
Solution Approach 1:
Upper and lower unit heads apply equal and opposite tension forces to the tape system. The upper unit head pulls upward while the lower unit head pulls downward with corresponding force, creating a balanced tension system that secures electrode plates without causing net displacement or deformation of the electrode stack
Solution Approach 2:
The support tools position the upper and lower unit heads at symmetric locations relative to the electrode stack centerline. This symmetric positioning ensures uniform force distribution across all electrode plates, preventing localized stress concentration that could lead to deformation while maintaining consistent fixing force throughout the stack
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
Prevents salt extraction by increasing adhesion and fixing force to electrode plates, improving the integrity of the electrode stack.
Implementation Method 1
the upper tape is held by the upper head unit by an upper vacuum suction pad, and the lower tape is held by the lower tape unit by a lower vacuum suction pad
Data Source
AI summary
The present disclosure provides an electrode stack taping method, a taping device, and a secondary battery. The electrode stack taping method comprises a support tool driving step in which an upper support tool presses an upper side of an electrode stack and a lower support tool presses a lower side of the electrode stack; a unit head driving step in which an upper unit head applies tension to an upper tape by the upper tape away from the electrode stack while a side of the upper tape is attached to the upper side of the electrode stack, and a lower unit head applies tension to a lower tape by pulling the lower tape away from the electrode stack a side of the lower tape is attached to the lower side of the electrode stack The method may form a secondary battery in which salt extraction is prevented by increased adhesion and fixing force to a plurality of electrode plates.