Electrode Stack Adhesive Curing With Zoned Heating and Cooling
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Solution Overview
Problem
Current methods for curing adhesives between electrode layers in electrode stacks are cumbersome and time-consuming, often requiring unnecessary heating which leads to high mechanical stress and inefficient processes.
Innovation Solution
A procedure and device that selectively heat only the areas with adhesive between electrode layers, while cooling non-adhesive areas, using a transport device and a zoned stamp to promote continuous curing without mechanical tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire electrode stack is heated for curing adhesive, then the adhesive bonding is achieved, but high mechanical stress and damage to electrode layers occur
Solution Approach 1:
The patent applies local quality by heating only the specific regions where adhesive is present between electrode layers, rather than heating the entire electrode stack. This localized heating approach ensures adequate adhesive curing while minimizing thermal exposure to other areas, thereby reducing mechanical stress and preventing damage to the electrode layers.
2Object-affected harmful factors
If shielding is used to protect non-heated areas, then mechanical stress is reduced, but the process becomes cumbersome and time-consuming
Solution Approach 1:
The patent employs segmentation by dividing the heating process into distinct zones - heated regions corresponding to adhesive locations and non-heated regions for other areas. This segmentation eliminates the need for physical shielding mechanisms, allowing the electrode stack to be conveyed continuously through the curing process without stopping or requiring complex shielding arrangements.
Solution Approach 2:
The patent replaces the mechanical shielding system with a selective heating system. Instead of using physical barriers to protect non-heated areas, the invention uses controlled thermal fields that can be precisely directed to heat only where adhesive is present, thereby eliminating cumbersome shielding mechanisms and enabling continuous processing.
3Productivity
If continuous conveying is implemented, then productivity is improved, but precise temperature control of specific regions becomes more difficult
Solution Approach 1:
The patent applies dynamics by making the heating system adaptable to the continuous motion of the electrode stack. The selective heating zones are designed to work in conjunction with the conveying system, allowing precise temperature control of specific regions even while the material moves continuously through the process. This dynamic approach enables both high productivity and accurate temperature management.
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 reduces mechanical load on adhesive connections, allows for a continuous and efficient curing process, and eliminates the need for cumbersome shielding of non-heated areas, resulting in a faster and less stressful adhesive curing process.
Implementation Method 1
providing a stamp which can be temperature-controlled in zones and which is configured to press an electrode stack picked up by the transport device against the transport device
Implementation Method 2
The stamping die can be tempered zone by zone, meaning only contact surfaces or areas between the stamping die and the electrode stack that correspond to and/or are in contact with the stack's tempering zones are tempered
Implementation Method 3
The regions of the MEA/electrode stack that do not correspond to an adhesive between the electrode layers, i.e., the regions without adhesive, can be cooled
Data Source
Figure 1
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Figure 5~5a
AI summary
A method for curing an adhesive between the electrode layers of an electrode stack comprises the steps of: providing an electrode stack with several electrode layers, between which at least some adhesive is arranged; picking up the electrode stack with a conveying device; conveying the picked-up electrode stack through the conveying device along a conveying path to a curing station; providing a punch which can be temperature-controlled zone by zone and which is configured to press an electrode stack picked up by the conveying device against the conveying device; conveying the electrode stack picked up by the conveying device through the curing station, and curing the adhesive between the several electrode layers in the curing station; removing the punch from the electrode stack; and removing the electrode stack from the conveying device.