Secondary Battery Cell Winding With Burr-Reduced Electrode Notches
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium-ion battery manufacturing faces challenges with high costs, space requirements, and safety hazards due to burrs on electrode plates causing internal short circuits, which reduce energy density and pose severe safety risks.
Innovation Solution
A secondary battery cell design with integrated notch features on electrode plates and a winding formation system that integrates multiple mechanisms on a single platform to clean, die-cut, and connect electrode tabs, reducing burrs and improving safety and energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a groove is configured on the electrode plate and laser cleaning is used to remove burrs, then energy density is improved, but safety hazards increase due to overheating and burr formation
Solution Approach 1:
The patent applies preliminary action by performing die-cutting to remove burrs from the electrode plate groove edges before the laser cleaning process. This preventive measure eliminates the source of potential short circuits before they can cause safety hazards, while still maintaining the energy density benefits of groove configuration.
Solution Approach 2:
The patent converts the harmful effect of laser cleaning (which can cause overheating and burr formation) into a beneficial process by adding die-cutting as a preliminary step. The die-cutting process removes potential burrs before laser cleaning, transforming a potentially harmful process into a safe and effective combination that maintains both energy density and safety.
2Manufacturing precision
If independent laser cleaning device and welding-winding device are used separately, then manufacturing precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the laser cleaning device and welding-winding device into an integrated system where both functions are performed in sequence on the same equipment platform. This combination maintains the manufacturing precision of independent devices while reducing overall device complexity and factory space requirements.
Solution Approach 2:
The patent creates a multi-functional device that performs both laser cleaning and welding-winding operations. This universal device handles multiple manufacturing steps that were previously required by separate specialized devices, thereby reducing device complexity while maintaining processing precision through dedicated functional modules.
3Reliability
If thick adhesive tape is stuck in the groove to prevent burrs, then safety is improved, but cell thickness increases and energy density decreases
Solution Approach 1:
The patent extracts and removes burrs from the electrode plate groove edges through die-cutting before assembly, eliminating the need for thick adhesive tape. This extraction of the harmful element (burs) maintains safety performance while avoiding the energy density loss associated with adding thick protective tape.
Solution Approach 2:
The patent applies preliminary action by removing burrs through die-cutting before the electrode plates are assembled into the cell. This preventive removal of burrs eliminates the need for subsequent protective measures like thick adhesive tape, thereby maintaining both safety and energy density.
Data Source
AI summary
A secondary battery cell includes an anode electrode plate, an anode electrode tab, a cathode electrode plate, a cathode electrode tab and a separator. The secondary battery cell winding formation system includes a working platform, a winding mechanism, an anode electrode plate unwinding roller, an anode electrode plate cleaning mechanism, an anode electrode plate die-cutting mechanism, an anode electrode tab supply mechanism, an anode electrode tab connection mechanism, an anode electrode plate convey mechanism, a cathode electrode plate unwinding roller, a cathode electrode plate cleaning mechanism, a cathode electrode plate die-cutting mechanism, a cathode electrode tab supply mechanism a cathode electrode tab connection mechanism, a cathode electrode plate convey mechanism, a first separator unwinding roller, a second separator unwinding roller, a first separator convey mechanism and a second separator convey mechanism.