Laminating Machine Without PET Film for Battery Electrode Bonding
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Solution Overview
Problem
The existing lithium battery manufacturing process requires the use of PET films for lamination, which increases costs due to the consumption of materials and equipment, and results in low production efficiency.
Innovation Solution
A laminating machine that forms a combining material strip without PET films by using a crease mechanism to create creases on a belt-shaped electrode material strip, heats and melts adhesives, and rolls the materials to form a second combining material strip, eliminating the need for PET films and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PET film and oven are used for lamination, then bonding strength is achieved, but manufacturing cost increases and production efficiency decreases
Solution Approach 1:
The patent removes the PET film from the lamination process entirely. Instead of using PET film as a carrier and bonding medium, the invention directly bonds the electrode material strip to the diaphragm using heat and pressure applied by the rolling mechanism, eliminating the need for PET film unwinding and winding mechanisms.
Solution Approach 2:
The patent replaces the oven-based thermal processing system with a localized heating mechanism integrated into the rolling device. This allows heating and rolling to occur simultaneously in one station rather than requiring a separate oven, improving production efficiency while maintaining bonding strength.
2Reliability
If PET film is used for lamination, then material protection is achieved, but equipment complexity and cost increase
Solution Approach 1:
The patent eliminates the PET film and its associated unwinding and winding mechanisms from the system. The electrode material strip is processed directly without being mounted on a PET film carrier, significantly simplifying the equipment structure while still achieving proper material handling and protection through the rolling mechanism.
3Reliability
If adhesives are heated and melted, then bonding strength is improved, but risk of material displacement increases
Solution Approach 1:
The patent combines the heating function and rolling function into a single integrated mechanism. The heating element is positioned within or adjacent to the rolling mechanism, allowing heat to be applied to the adhesives simultaneously as the rolling pressure is applied. This coordinated action ensures that adhesives melt and bond materials together in the same location, preventing displacement while achieving strong bonding.
Solution Approach 2:
The heating mechanism is positioned upstream or integrated with the rolling mechanism, so that adhesives are pre-heated and softened before the rolling pressure is fully applied. This preliminary heating action prepares the adhesives for bonding, ensuring they are in the optimal state for attachment when the rolling force is exerted, thereby preventing displacement.
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
This method improves manufacturing efficiency and reduces costs by eliminating the need for PET films and associated equipment, while ensuring strong bonding and preventing material displacement during the lamination process.
Implementation Method 1
a heating mechanism arranged downstream of the first sheet material device and the second sheet material device, and used to heat the first combining material strip attached with the first sheet material and the second sheet material
Implementation Method 2
adhesives on opposite sides of the first combining material strip are heated and melted by the heating device
Implementation Method 3
a rolling mechanism arranged downstream of the heating mechanism, and used to roll the first combining material strip attached with the first sheet material and the second sheet material
Data Source
AI summary
The present application relates to a laminating machine, including a heating device, a first sheet material device, a second sheet material device, and a first combining device. By using the laminating machine, adhesives on opposite sides of a first combining material strip are heated and melted by the heating device; then, the first sheet material device and the second sheet material device attach a first sheet material and a second sheet material to the opposite sides of the first combining material strip respectively; next, a second combining material strip is formed by the first combining device. Due to the adhesives being melted, bonding strength of the first sheet material and the second sheet material to the first combining material strip can be guaranteed, avoiding a displacement after the first sheet material and the second sheet material are attached to the first combining material strip.