Infrared LED Electrode Lamination for Uniform Battery Adhesion
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Solution Overview
Problem
The stack type secondary battery electrode lamination process faces challenges in precise alignment and requires numerous steps, leading to poor quality and inefficiency due to simple pressurization methods, as seen in existing manufacturing apparatuses.
Innovation Solution
A secondary battery lamination device utilizing infrared LED lamps for heat and pressure application, allowing for uniform adhesive strength and air permeability by individually controlling the output of infrared LED lamps during the lamination process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If simple pressurization is used for electrode lamination, then the manufacturing process is simple, but the quality of the manufactured electrode deteriorates
Solution Approach 1:
The patent applies infrared radiation heating to change the thermal parameters during lamination, transforming the process from simple cold pressurization to thermal-pressurization. This parameter change enables better adhesion and uniformity of the electrode while maintaining process simplicity through automated infrared heating control.
Solution Approach 2:
The infrared LED lamps are controlled to operate in periodic cycles during the lamination process, with controlled heating periods followed by pressing periods. This periodic action ensures uniform heat distribution and prevents overheating, improving electrode quality without complicating the manufacturing process.
2Temperature
If a general heater is used for heating during lamination, then heating coverage is sufficient, but the equipment cost increases and the heat source portion becomes larger
Solution Approach 1:
The patent replaces traditional mechanical contact heaters with infrared LED lamps that emit infrared radiation. This substitution eliminates the need for large heating plates and complex thermal conduction systems, reducing equipment size and cost while providing sufficient heating coverage through direct radiation to the electrode layers.
Solution Approach 2:
The infrared heating system transitions from two-dimensional contact heating to three-dimensional radiation heating. The infrared lamps can heat the electrode assembly from multiple angles and depths simultaneously, providing comprehensive heating coverage without requiring a large physical heat source structure.
3Device complexity
If infrared LED lamps are used for heating, then the heat source portion is shorter and equipment cost is reduced, but individual control capability is required to ensure uniform heating
Solution Approach 1:
The infrared heating system is divided into multiple independent LED lamp modules that can be individually controlled. Each module can be adjusted separately to compensate for variations in electrode thickness, material properties, and heat dissipation patterns, ensuring uniform adhesive strength across the entire electrode assembly.
Solution Approach 2:
The system incorporates temperature sensors and control circuits that monitor the heating status of each infrared LED lamp module in real-time. Based on feedback from temperature measurements, the control system automatically adjusts the power output of individual lamps to maintain uniform heating and adhesive strength across the electrode.
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 approach enhances the quality and efficiency of the electrode lamination process, reducing equipment costs and extending the lifespan of the infrared LED lamps, while improving the reliability and air permeability of the secondary battery.
Implementation Method 1
an infrared LED (Light-Emitting Diode) 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
AI summary
One aspect of the present disclosure relates to a secondary battery lamination device, and more particularly, the secondary battery lamination device includes an infrared LED heat source portion including a plurality of individually controllable infrared LED lamps and a pressurizing portion, thereby manufacturing a battery with improved uniformity of adhesive strength and air permeability between the positive electrode, the separator, and the negative electrode.