Zigzag-Folded Solid-State Battery Assembly to Prevent Short-Circuiting
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Solution Overview
Problem
The manufacturing process of all-solid-state batteries is complex due to the need for bonding and stacking of unit cells, which can lead to electrode short-circuiting during the stacking process.
Innovation Solution
A folding type all-solid-state battery design where the cathode and anode parts are folded in a zigzag form with protrusion and recessed portions to prevent short-circuiting, allowing for a more straightforward assembly and mass production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unit cells are bonded and stacked through punching, then all-solid-state battery can be manufactured, but the manufacturing method becomes very complex and electrodes may short-circuit during stacking
Solution Approach 1:
The battery structure is divided into multiple unit cells, each containing cathode active material layers, anode active material layers, and solid electrolyte layers arranged in a segmented pattern. This segmentation allows for simplified assembly while maintaining electrical isolation between electrodes through the solid electrolyte barriers.
Solution Approach 2:
A solid electrolyte layer is introduced as an intermediary substance between the cathode and anode active material layers. This solid electrolyte serves as both an ion conductor and a physical barrier that prevents direct contact and short-circuiting between electrodes, eliminating the need for complex bonding and stacking processes.
2Ease of manufacture
If bonding and stacking of unit cells is performed, then battery assembly is achieved, but manufacturing complexity increases significantly
Solution Approach 1:
Multiple functional layers (cathode active material, anode active material, and solid electrolyte) are combined into integrated unit cell structures where the solid electrolyte simultaneously serves as an ion conductor and a structural separator. This merging reduces the number of separate bonding and stacking operations required in traditional manufacturing.
Data Source
AI summary
An all-solid-state battery, in which a cathode part and an anode part are coupled in a state of being folded in a zigzag form, is disclosed. The cathode part has a shape folded in a zigzag form such that the cathode part is divided into unit areas each corresponding to an area of a unit cathode. The anode part has a shape folded in a zigzag form such that the anode part is divided into unit areas each corresponding to an area of a unit anode. A protrusion portion of the cathode part may be inserted into a recessed portion of the anode part, and a protrusion portion of the anode part may be inserted into a recessed portion of the cathode part.