Battery Cell Electrolyte Suction to Prevent Molding Contamination
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Solution Overview
Problem
Residual electrolyte in cylindrical secondary batteries can cause dimensional abnormalities, contamination of the cell's upper portion, and contamination of molding equipment, leading to limitations in continuous production.
Innovation Solution
An apparatus comprising a suction part with openings and a pump part connected to generate vacuum pressure, designed to remove residual electrolyte from battery cells by seating the suction part on the battery cell and using the pump to create suction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If molding is performed without cleaning the residual electrolyte, then production time is reduced, but dimensional abnormalities and contamination occur
Solution Approach 1:
The suction part is positioned and activated before the molding process to remove residual electrolyte in advance. This preliminary cleaning action prevents contamination during subsequent molding operations, allowing high-speed production without sacrificing dimensional accuracy.
2Device complexity
If residual electrolyte is not cleaned, then process steps are reduced, but contamination of cell and equipment occurs
Solution Approach 1:
The suction part extracts residual electrolyte from the battery cell using vacuum pressure generated by the pump part. This extraction removes the harmful substance before it can cause contamination, eliminating the need for additional cleaning steps while preventing contamination of the cell and equipment.
3Reliability
If suction part outer diameter is increased to improve contact, then suction effectiveness improves, but device complexity increases
Solution Approach 1:
The suction part features a lower portion with a larger outer diameter (90-100% of battery cell diameter) that contacts the battery cell surface, providing effective suction. The upper portion tapers to a smaller diameter for connection to the pump part, optimizing both suction effectiveness and structural simplicity.
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 apparatus effectively removes residual electrolyte, preventing dimensional abnormalities and contamination, thereby enabling continuous production with improved product quality and reliability.
Implementation Method 1
a pump part connected to the suction part to generate a vacuum pressure, thereby generating suction force
Data Source
Figure 1A
Figure 1B
Figure 2~3
AI summary
Apparatus for removing a residual electrolyte, in which a residual electrolyte remaining after an electrolyte injection is removed in a suction manner to solve limitations in dimensional abnormalities, contamination of an upper portion of a cell, and contamination of molding equipment, thereby enabling continuous production and improving product quality and product reliability, and a method for removing a residual electrolyte using the same. An apparatus for removing a residual electrolyte includes a battery cell including an electrode assembly and an electrolyte, a suction part having at least one opening and configured to suction the residual electrolyte remaining in the battery cell, and a pump part connected to the suction part to generate a vacuum pressure, thereby generating suction force.