Temperature-Controlled Web Lamination to Prevent Cell Layer Waviness
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Solution Overview
Problem
The lamination of multilayer continuous webs for energy cells results in curvature and waviness due to differing thermal expansion coefficients of electrodes and separator materials, leading to suboptimal connections.
Innovation Solution
A laminating apparatus with temperature-controlled pressing surfaces that apply inverse temperature gradients to compensate for thermal expansion differences, using heating or cooling segments and varying thermal conductivities to ensure uniform lamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform compressive force is applied during lamination, then connection quality between layers is improved, but curvature and waviness increase due to differing thermal expansion coefficients
Solution Approach 1:
The patent applies different temperature control to different zones of the pressing device, creating local thermal conditions that compensate for the different thermal expansion coefficients of electrodes and separator materials. This localized temperature variation allows uniform compression force to be applied while preventing curvature and waviness formation.
Solution Approach 2:
The patent changes the temperature parameter across different zones of the pressing device during lamination. By varying temperature locally, the thermal expansion of different materials is compensated, allowing uniform compressive force to produce flat, well-connected laminated structures without curvature or waviness.
2Reliability
If temperature is increased during lamination, then connection quality is improved, but thermal expansion differences cause curvature and waviness
Solution Approach 1:
The patent applies different temperature control to different zones of the pressing device, creating local thermal conditions that compensate for the different thermal expansion coefficients of electrodes and separator materials. This localized temperature variation allows uniform compression force to be applied while preventing curvature and waviness formation.
Solution Approach 2:
The patent explicitly utilizes thermal expansion principles by applying different temperatures to different zones during lamination. The temperature distribution is designed to compensate for the inherent thermal expansion differences between materials, preventing curvature while maintaining connection quality.
3Adaptability or versatility
If different materials with different thermal expansion coefficients are laminated, then functional requirements are met, but curvature and waviness occur during lamination
Solution Approach 1:
The patent applies different temperature control to different zones of the pressing device, creating local thermal conditions that compensate for the different thermal expansion coefficients of electrodes and separator materials. This localized temperature variation allows uniform compression force to be applied while preventing curvature and waviness formation.
Solution Approach 2:
The patent explicitly utilizes thermal expansion principles by applying different temperatures to different zones during lamination. The temperature distribution is designed to compensate for the inherent thermal expansion differences between materials, preventing curvature while maintaining connection 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
The apparatus reduces waviness and curvature, enabling homogeneous connections between electrodes and separator webs by adapting lamination to thermal expansion characteristics.
Implementation Method 1
The continuous web is compressed with the separator webs in these continuous webs. In principle, the electrodes are connected and laminated to the separator webs using a pressing device by exerting a compressive force.
Implementation Method 2
lamination can be assisted by the generation of heat as a result of the compressive force
Implementation Method 3
the pressing surfaces are temperature-controlled differently
Implementation Method 4
the electrodes and the separator material are made of materials with different thermal expansion coefficients, so that the continuous web after lamination and/or the segments cut from it are subsequently curved and/or can have a wavy shape
Data Source
AI summary
The invention relates to a laminating apparatus for a multilayer continuous web composed of at least one separator web and at least one electrode for producing energy cells, with a pressing device which laminates the multilayer continuous web by exerting a compressive force, wherein the pressing device has two pressing surfaces, with which it comes into contact with different sides of the continuous web, and the pressing surfaces are temperature-controlled differently.