Infrared LED Lamination Heating for Uniform Battery Electrode Bonding
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Solution Overview
Problem
Existing secondary battery lamination processes face challenges in achieving uniform adhesive strength and air permeability, leading to reduced product quality and increased process inefficiency.
Innovation Solution
A secondary battery lamination device utilizing an infrared LED heat source portion with individually controllable infrared LED lamps to apply heat and pressure uniformly during the lamination process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If simple pressurization is used for electrode lamination, then the process is simple, but the quality of the manufactured electrode deteriorates due to non-uniform adhesive strength and air permeability
Solution Approach 1:
The invention applies infrared radiation heating to change the thermal parameters during lamination, heating the electrodes to optimized temperatures (e.g., 60-100°C) before and during pressurization. This temperature control enables uniform adhesive strength and air permeability while maintaining process simplicity, resolving the contradiction between ease of manufacture and manufacturing precision.
Solution Approach 2:
The invention replaces conventional thermal conduction heating with infrared radiation heating. The infrared heating unit directly radiates heat to the electrodes without requiring physical contact or complex thermal conduction paths, enabling rapid and uniform heating throughout the lamination process, thereby improving manufacturing precision while keeping the system simple.
2Temperature
If conventional heaters are used for heating during lamination, then heating can be applied, but the equipment cost increases and process efficiency decreases due to larger equipment size and longer heating time
Solution Approach 1:
The invention substitutes conventional thermal conduction heaters with infrared LED lamps that emit infrared radiation. This optical heating method directly penetrates and heats the electrodes rapidly without requiring large equipment or long heating times, thereby improving productivity and reducing equipment cost while maintaining effective heating capability.
Solution Approach 2:
The infrared LED lamps can be controlled to operate in periodic or pulsed modes, applying heat only when needed during the lamination process. This reduces overall energy consumption and heating time, improving process efficiency and productivity while maintaining the necessary temperature control for quality lamination.
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 device improves the uniformity of adhesive strength and air permeability between layers, enhancing the reliability and quality of the secondary battery while reducing equipment costs and increasing process efficiency.
Implementation Method 1
an infrared LED heat source portion which is positioned on one side and/or the other side of the laminate moving portion and supplies infrared light to the laminate to bond the positive electrode, the separator and the negative electrode
Data Source
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AI summary
The present invention relates to a secondary battery lamination device and, more specifically, the secondary battery lamination device includes a pressing unit and an infrared LED heat source unit including a plurality of individually controllable infrared LED lamps, so that a battery with improved uniformity in the air permeability and adhesion between a positive electrode, a separator, and a negative electrode can be manufactured.