Planar Electrode Nonaqueous Battery Design
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Solution Overview
Problem
Conventional nonaqueous secondary batteries face challenges in being made thinner without compromising battery performance, as thinner electrodes lead to deterioration in performance.
Innovation Solution
The battery design involves arranging the positive and negative electrodes in the same plane with their end surfaces facing each other at a distance, supported by a substrate, and enclosed in an airtight chamber with a gas barrier cover member, using an electrolyte that participates in the battery reaction between the electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the battery is made thinner by using thinner electrodes, then the battery thickness is reduced, but the battery performance deteriorates
Solution Approach 1:
The patent transitions from a conventional three-layer stacked electrode arrangement to a planar two-dimensional arrangement where positive and negative electrodes are positioned side-by-side in the same plane. This dimensional reconfiguration allows the battery to achieve thinness in the thickness direction while maintaining effective electrode area and performance through extended planar dimensions.
2Length of moving object
If the electrode thickness is reduced to make the battery thinner, then the battery structure becomes thinner, but the charge-discharge capability deteriorates
Solution Approach 1:
By arranging electrodes in a planar configuration rather than stacking them vertically, the patent maintains sufficient electrode thickness for adequate charge-discharge capability while achieving overall battery thinness through extended planar layout. The side-by-side arrangement preserves electrochemical performance by maintaining effective electrode volume and surface area.
3Ease of manufacture
If conventional laminated electrode structure is used, then the battery can be manufactured with standard processes, but the battery cannot be made thinner without performance loss
Solution Approach 1:
The patent employs a planar electrode arrangement that can be manufactured using conventional thin-film deposition and patterning techniques. This approach maintains compatibility with existing manufacturing processes while achieving reduced battery thickness, as the planar structure allows for precise control of electrode dimensions and positioning through standard semiconductor fabrication methods.
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 design allows for a thinner battery structure without performance deterioration, maintaining efficient charge-discharge capabilities and capacity retention even at higher C-rates and after multiple cycles.
Implementation Method 1
an electrolyte that is housed in the airtight chamber so as to be present at least between the facing end surfaces of the positive electrode and the negative electrode, the electrolyte being involved in a battery reaction between the positive electrode and the negative electrode
Implementation Method 2
a cover member that has gas barrier properties and defines an airtight chamber together with the substrate
Data Source
AI summary
A nonaqueous secondary battery which can be made thinner without deterioration of battery performance, and a method for manufacturing the battery. The nonaqueous secondary battery includes a positive electrode and a negative electrode which are substantially arranged in the same plane so that respective end surfaces face each other at a distance; a substrate by which the positive electrode and the negative electrode are affixed and supported; a cover member having gas barrier properties, which defines an airtight chamber together with the substrate, in the chamber in which the positive electrode and the negative electrode are contained; and an electrolyte which is contained in the airtight chamber so as to be positioned at least between the facing end surfaces of the positive electrode and the negative electrode, and which relates to the battery reaction between the positive electrode and the negative electrode.