Heated Roller Lamination for Lithium Polymer Battery Adhesion
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Solution Overview
Problem
Current methods for large-scale production of lithium polymer batteries are inefficient in laminating composite positive electrodes onto substrate support films, leading to suboptimal adhesion and production costs.
Innovation Solution
A process and apparatus involving heating and lamination rollers to bond composite electrode sheets onto electrically conductive support films, with adjustable pressure and heaters to enhance adhesion, allowing for efficient and high-quality lamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional lamination methods are used for large-scale production, then production volume can be increased, but adhesion quality deteriorates
Solution Approach 1:
The patent applies parameter changes by controlling temperature and pressure during the lamination process. The support film is heated to a specific temperature range (typically 80-150°C) and pressure is applied through rollers to achieve optimal adhesion between the electrode sheet and support film, resolving the contradiction between production volume and adhesion quality
Solution Approach 2:
The patent replaces conventional mechanical lamination methods with a thermal-mechanical lamination system. Instead of relying solely on mechanical pressure, the system uses heated rollers that combine thermal energy with mechanical pressure to achieve superior adhesion, enabling both high productivity and high adhesion quality in large-scale production
2Productivity
If lamination speed is increased for efficient production, then productivity improves, but adhesion quality deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-heating the support film before the lamination process. This preparation step ensures that the support film is at the optimal temperature for adhesion before the electrode sheet is applied, allowing for faster lamination speeds without compromising adhesion quality
Solution Approach 2:
The patent uses parameter changes by optimizing the temperature profile during lamination. The heated rollers maintain a controlled temperature that allows for rapid lamination while ensuring sufficient thermal energy is transferred to achieve strong adhesion, thus improving productivity without sacrificing adhesion quality
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 the efficiency and quality of lamination, enabling cost-effective large-scale production of lithium polymer batteries with enhanced adhesion between electrode sheets and support films.
Implementation Method 1
heating the electrically conductive support film
Implementation Method 2
lamination rollers forming a nip
Implementation Method 3
enhance adhesion
Data Source
AI summary
A process for laminating at least one electrode sheet onto an electrically conductive support film is provided. The process comprises heating the electrically conductive support film and laminating the at least one electrode sheet onto at least one side of the heated electrically conductive support film. An apparatus for laminating at least one electrode sheet onto an electrically conductive support film is also provided. The apparatus comprises lamination rollers forming a nip and means for carrying the electrically conductive support film and the at least one electrode sheet to the nip formed by the lamination rollers. The apparatus also comprises a heater for heating the electrically conductive support film before the electrically conductive support film reaches the nip formed by the lamination rollers.