Stacked Electrode Protrusion Layout for Misregistration Checking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for detecting misregistration in stacked electrodes of all-solid-state batteries face challenges, particularly in lower layers due to vibrations and hidden misregistration on side faces, making it difficult to accurately check for misalignment.
Innovation Solution
A stacked electrode body design with protrusions on each electrode body that have phase differences in the stacking direction, allowing for identification and checking of misregistration through imaging examination, and a resin-fixed version to enhance adhesive strength and prevent short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electrodes are automatically checked for misregistration by imaging the top surface, then the checking process is simple and easy to carry out, but misregistration in second and subsequent layers from the top cannot be detected due to vibration during layering
Solution Approach 1:
The invention transitions from two-dimensional top-surface imaging to three-dimensional side-face imaging by adding protrusions that extend beyond the electrode edges. This dimensional extension allows imaging devices to capture misregistration in all stacked layers through side-view photography, eliminating the limitation of top-surface-only detection.
Solution Approach 2:
Protrusions serve as intermediary markers attached to each electrode layer. These protrusions provide visible reference points that facilitate the detection of misregistration by creating distinguishable features in images, enabling accurate measurement of electrode positioning in stacked layers.
2Measurement precision
If side faces of layered electrode elements are checked for misregistration, then all layers can be detected, but some layers become hidden due to flexure of the electrode elements making the check difficult
Solution Approach 1:
The protrusions are pre-positioned on each electrode layer before stacking, creating fixed reference markers that maintain their relative positions. This preliminary positioning ensures that even when electrodes flex or deform during stacking, the protrusions remain as stable reference points for misregistration detection.
Solution Approach 2:
The protrusions provide visual contrast and distinguishable features against the electrode background, making them easily detectable in images. This visual differentiation allows imaging devices to clearly identify and track the position of each electrode layer's protrusion, simplifying the detection process despite electrode flexure.
3Measurement precision
If protrusions are added to electrode bodies for misregistration detection, then comprehensive checking of the entire stacked electrode body becomes possible, but the device complexity increases
Solution Approach 1:
The electrode body is segmented by adding discrete protrusions at specific locations rather than modifying the entire electrode structure. This segmentation approach allows misregistration detection while maintaining the overall simplicity of the electrode design, as only specific portions are modified with protrusions.
Data Source
AI summary
Provided is a stacked electrode body the whole of which can be checked for misregistration. A stacked electrode body for an all-solid-state battery includes a plurality of electrode bodies that are stacked and each includes a first electrode, a solid electrolyte layer, a second electrode, and a second current collector which are disposed on each of both surfaces of a first current collector in this order, wherein each of the electrode bodies has a protrusion protruding outward from a side face thereof, and the protrusions have phase differences in a stacking direction.