Lithium Battery Upper Cover Jet Printing With Flying Ink Blocking
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Solution Overview
Problem
During jet printing of a protective layer on the upper cover of a lithium battery, ink splashes (flying ink) often land on non-jet printed areas such as positive and negative electrodes, liquid injection holes, and two-dimensional code areas, leading to processing defects and quality issues.
Innovation Solution
A jet printing process is developed that divides the printing region into a first and second jet printing region, combined with a flying ink blocking plate featuring a hollowed-out jet printing window. This setup prevents flying ink from splashing onto non-jet printed areas by aligning the ink blocking plate with the non-printing regions, ensuring precise ink application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If jet printing is performed on the upper cover end face to form a protective layer, then the printing coverage is improved, but ink splashes onto non-printing areas causing processing defects
Solution Approach 1:
The jet printing process is divided into two sequential stages: first printing the protective layer on the lower portion of the upper cover end face, then printing the remaining areas after repositioning. This segmentation allows controlled ink application while preventing splash contamination of non-printing areas such as electrode regions and liquid injection holes.
Solution Approach 2:
The flying ink blocking plate is pre-positioned to cover non-printing areas before jet printing begins. This preliminary protective action prevents ink splash from reaching sensitive regions during the printing process, eliminating the need for post-processing cleanup and ensuring printing quality from the start.
2Productivity
If the jet printing region is expanded to cover the entire upper cover end face, then printing efficiency is improved, but quality defects occur due to ink splashing on non-printing portions
Solution Approach 1:
The flying ink blocking plate is designed to be repositionable between printing stages. After completing printing on the lower portion, the plate is repositioned to cover different non-printing areas for the second printing stage. This dynamic adjustment maintains high printing efficiency while ensuring quality protection throughout the process.
3Manufacturing precision
If a flying ink blocking plate is introduced to prevent ink splash, then printing quality is improved, but device complexity increases
Solution Approach 1:
The flying ink blocking plate serves as an intermediary component between the jet printing system and the upper cover end face. This simple plate structure effectively blocks ink splash without requiring complex modification to the printing system itself, maintaining device simplicity while improving printing quality.
Data Source
AI summary
The present invention discloses a jet printing process for a protective layer of an upper cover of a lithium battery, a jet printing region is divided into a first jet printing region and a second jet printing region and is combined with a flying ink blocking plate having a hollowed-out jet printing window, such that flying ink can be prevented from splashing onto non-jet printed areas such as a positive and negative electrodes, a liquid injection hole, a two-dimensional code area of the upper cover of lithium battery during jet printing at a position which requires ink jet printing.