Laminated Battery Current Collector Layer Configuration
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Solution Overview
Problem
Existing battery technologies face reliability issues in the connection between power generating elements, leading to defects such as corrosion and reduced performance over time.
Innovation Solution
A battery design featuring laminated power generating elements with specific layer configurations, where the outer layers of the electrode current collectors are made of the same material to prevent environmental gas penetration and potential differences, enhancing electrical connection and corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different materials are used for inner and outer layers of electrode current collectors, then electrical connection and corrosion resistance are improved, but manufacturing complexity increases
Solution Approach 1:
The current collector is designed with different materials for inner and outer layers, where the inner layer (first material) provides electrical conductivity and structural support, while the outer layer (second material) provides corrosion resistance and environmental barrier. This local differentiation of material properties optimizes each layer's function for its specific role in the battery structure.
Solution Approach 2:
The current collector employs a composite structure combining two different materials in a laminated configuration. The first material (e.g., aluminum or copper) and second material (e.g., stainless steel or nickel-plated layer) work together to provide both electrical conductivity and corrosion resistance, creating a composite material system that leverages the advantages of each component material.
Data Source
AI summary
A battery includes first and second power generating elements laminated to each other. In the first power generating element, the inner layer of a first electrode current collector is in contact with a first electrode active material layer. In the second power generating element, the inner layer of a second electrode current collector is in contact with a second electrode active material layer. The outer layers of the first electrode current collector and the second electrode current collector are in contact with each other. The inner layer of the first electrode current collector contains a first material; the inner layer of the second electrode current collector contains a third material different from the first material; the outer layer of the second electrode current collector contains a second material different from the first material; and the outer layer of the first electrode current collector contains the second material.