Fluorine-Coated Battery Electrode Plate for Separator Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing secondary batteries face reliability issues due to potential contact between the electrode plates and the separator, leading to damage and reduced performance.
Innovation Solution
A secondary battery electrode plate design featuring a metal core body with active material layers on both sides, a protruding tab, and a fluorine-containing coating on the end surface of the core body to prevent contact with the separator and suppress large current flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the electrode plate is positioned adjacent to the separator, then the battery structure is compact, but the electrode plate may contact the separator causing damage and reduced reliability
Solution Approach 1:
An insulating coating layer is applied to the end surface of the current collector, serving as an intermediary barrier between the electrode plate and separator. This coating prevents direct contact while maintaining the compact battery structure, thereby eliminating the reliability issue without sacrificing space efficiency.
2Ease of manufacture
If the electrode plate ends are exposed, then the manufacturing process is simple, but large current flow may occur between electrode plates causing short circuits
Solution Approach 1:
The electrical conductivity parameter of the end surface is modified by applying an insulating coating to the current collector. This changes the electrical property from conductive to insulating, preventing large current flow and short circuits while maintaining manufacturing simplicity through a straightforward coating process.
3Ease of manufacture
If no protective coating is applied to the current collector, then the manufacturing cost is low, but the separator may be damaged by contact with the electrode plate
Solution Approach 1:
A thin insulating coating film is applied to the end surface of the current collector. This thin film provides effective protection against separator damage while minimizing material usage and manufacturing complexity, achieving a balance between cost-effectiveness and reliability enhancement.
Data Source
AI summary
Provided are: a highly reliable secondary battery electrode plate; and a secondary battery using same. The electrode plate is a positive electrode plate for a secondary battery, the positive electrode plate having a metallic positive electrode core body and a positive electrode active material layer formed on both surfaces of the positive electrode core body, wherein the positive electrode plate has a first edge and a positive electrode tab protruding from the first edge, and a fluorine-containing coating is formed on the end surface of the positive electrode core body at the first edge of the positive electrode plate. The secondary battery has the positive electrode plate and a negative electrode plate.