All-Solid-State Battery Dry Pressing for Faster Plate Production
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Solution Overview
Problem
The existing manufacturing methods for all-solid-state batteries, particularly the wet isostatic pressing method, face challenges with low productivity due to complexity in sealing and unsealing, and there is a need for a new method to produce plate-shaped batteries efficiently.
Innovation Solution
An apparatus and method involving a pressure vessel, outer punch, and die configuration that allows for dry pressing of sheet materials using a medium to apply ultra-high pressure, eliminating the need for packaging-related envelope materials and vacuum processes, thereby simplifying the process and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wet isostatic pressing method is used, then productivity is improved, but device complexity increases due to sealing and unsealing requirements
Solution Approach 1:
The patent extracts the harmful wet environment (water or oil medium) from the pressing process by using a dry pressing method. The medium is completely removed, eliminating the need for sealing and unsealing operations while maintaining the ability to apply uniform ultra-high pressure for densifying the all-solid-state battery components.
Solution Approach 2:
The patent introduces a movable sealing member that acts as an intermediary between the pressing members and the battery stack. This sealing member can move between a sealing position (during pressing) and a non-sealing position (during loading and unloading), enabling automated control of the sealing function without manual intervention.
2Manufacturing precision
If packaging-related envelope materials and vacuum processes are used, then manufacturing precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent removes the need for packaging envelope materials and vacuum processes by conducting the pressing operation in a dry environment. The movable sealing member creates a controlled pressing zone without requiring external packaging, and the dry pressing eliminates vacuum requirements, thereby reducing material costs and simplifying the manufacturing process.
3Productivity
If pressing members are in direct contact with medium, then productivity is improved, but reliability decreases due to deformation and fatigue damage
Solution Approach 1:
The patent introduces a movable sealing member as an intermediary between the pressing members and the battery stack. This sealing member protects the pressing members from direct contact with the battery components during pressing, reducing deformation and fatigue damage while maintaining high pressing speed and productivity.
4Manufacturing precision
If manual sealing and unsealing operations are performed, then manufacturing precision is maintained, but productivity decreases
Solution Approach 1:
The patent transforms the static sealing approach into a dynamic one by using a movable sealing member that can automatically transition between sealing and non-sealing positions. This dynamic system enables automated loading and unloading operations without compromising sealing precision during the pressing phase, thereby significantly improving productivity.
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 enables the production of all-solid-state batteries with reduced material costs, shorter processing times, and extended equipment lifespan by preventing deformation and fatigue damage during the pressing process.
Implementation Method 1
a pressure vessel having a receiving space defined therein, the receiving space being configured to receive a medium... the outer punch is disposed such that an outside of the outer punch is in contact with the medium... allowing for dry pressing of sheet materials using a medium to apply ultra-high pressure
Data Source
AI summary
An embodiment of the present invention relates to an all-solid-state battery and an apparatus and method for manufacturing the all-solid-state battery. According to an embodiment of the present invention, a pressing process is performed in a state in which plate-shaped materials and die molds accommodating the plate-shape materials are accommodated in an outer punch mold, and thus it is possible to dry-press a plurality of the plate-shaped materials. Therefore, it is possible to simplify the process of dry-pressing the plate-shaped materials and shorten the required process time.