Solid Battery Insulating Part with Vent Holes for Gas Removal
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Solution Overview
Problem
Existing solid batteries sealed in exterior materials under reduced pressure face issues with gas removal, leading to potential expansion and reactions due to trapped gases, which can affect battery performance and safety.
Innovation Solution
Incorporating an insulating part with vent holes that are closed post-manufacturing to allow gas removal during depressurization, ensuring complete evacuation of gases from the exterior material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing portion is disposed on the outer periphery of the single cell to insulate between adjacent current collectors, then insulation between current collectors is improved, but gas removal during depressurization deteriorates due to hindrance to gas flow
Solution Approach 1:
The sealing portion is divided into a first sealing portion and a second sealing portion that are disposed at different positions. The first sealing portion is disposed on the outer periphery to provide insulation, while the second sealing portion is disposed at a different position to allow gas to pass through during depressurization, thus resolving the contradiction between insulation and gas removal
Solution Approach 2:
The second sealing portion acts as an intermediary that allows gas to pass through while the first sealing portion provides insulation. This intermediary structure enables both functions: insulation between current collectors and gas removal during depressurization
2Reliability
If the exterior material is sealed under reduced pressure to remove gas, then battery performance is improved by preventing gas expansion and reactions, but gas cannot be fully removed due to hindrance by the sealing portion
Solution Approach 1:
The sealing portion is segmented into first and second sealing portions with different functions. The first sealing portion provides insulation while the second sealing portion is positioned to allow gas passage during depressurization, enabling complete gas removal while maintaining battery performance
Solution Approach 2:
The second sealing portion is strategically positioned to extract the gas removal function from the insulation function. This allows gas to be completely removed during depressurization through the second sealing portion while the first sealing portion maintains insulation, thus resolving the contradiction between battery performance and gas removal efficiency
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 ensures full gas removal, preventing expansion and reactions, enhancing battery performance by ensuring proper contact between the solid electrolyte and electrodes, while maintaining insulation between current collectors.
Implementation Method 1
sealed in an exterior material under a reduced pressure; when depressurizing the inside of the exterior material
Data Source
AI summary
Provided are: a solid battery which has been sealed in an exterior material under a reduced pressure, wherein gas in the exterior material can be fully removed when depressurizing the inside of the exterior material; and a method of manufacturing the solid battery, the solid battery having a single cell having: a laminated body having a cathode layer, an anode layer, and an electrolyte layer disposed between the cathode layer and the anode layer; an insulating part disposed on an outer perimeter of the laminated body in a cross-sectional view of the laminated body in a direction orthogonal to a lamination direction thereof, and a pair of current collectors sandwiching the laminated body and the insulating part, wherein the single cell has been sealed in an exterior material under a reduced pressure; and the insulating part has vent holes.