Solid-State Battery Electrode Stack Edge Insulation for Heat Dissipation
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Solution Overview
Problem
High-voltage and high-capacity batteries face issues with heat generation and short circuiting due to current collector layer extensions, particularly when one collector layer area is larger than the other, leading to reduced battery performance and efficiency.
Innovation Solution
A solid-state battery design with an insulating member disposed on the edge of the electrode stack, where the second current collector layer is contacted with the insulating member, allowing for effective heat dissipation and preventing short circuits by bonding the collector layers together.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current collector layer extends from the electrode stack to form collector tabs, then electrical connection is improved, but short circuiting risk increases when one collector layer area is larger than the other
Solution Approach 1:
An insulating member is introduced as an intermediary between the first and second current collector layers. This insulating member prevents direct contact between the collector layers, eliminating the short circuiting risk while allowing both collector tabs to extend and maintain their electrical connection functions independently.
Solution Approach 2:
The space around the electrode stack is segmented into distinct functional zones by the insulating member. The insulating member creates separate regions for the first and second collector tabs, preventing their interaction while allowing each to perform its electrical connection function independently.
2Reliability
If the current collector layer area is made larger to improve electrical connection, then electrical performance is improved, but heat dissipation becomes more difficult
Solution Approach 1:
The insulating member acts as a thermal management intermediary. It provides thermal isolation between the first and second current collector layers, allowing each to be optimized for its specific thermal conditions. This enables larger collector layer areas for improved electrical connection without compounding heat issues, as the insulating member prevents heat accumulation through isolation.
3Reliability
If insulating member is added to prevent short circuiting, then short circuiting is prevented, but device complexity increases
Solution Approach 1:
The insulating member is designed to perform multiple functions simultaneously: it provides electrical insulation to prevent short circuiting, facilitates thermal management by isolating heat-generating components, and can serve as a structural support element. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
Solution Approach 2:
The insulating member combines several protective and functional features into a single integrated component. Rather than adding separate insulating layers, thermal management systems, and structural supports, the insulating member merges these functions into one element that addresses multiple requirements simultaneously.
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
The design effectively dissipates heat generated by the electrode stack, improves volumetric efficiency, and prevents short circuits, enhancing battery performance and efficiency.
Implementation Method 1
the second current collector layer is contacted with the insulating member... effectively dissipates heat generated by the electrode stack
Data Source
AI summary
The present disclosure provides a solid-state battery that can effectively dissipate heat generated by the electrode stack. the solid-state battery 10 of the disclosure comprises an electrode stack 110. The electrode stack 110 has a first current collector layer 111, a first electrode active material layer 112, a solid electrolyte layer 113, a second electrode active material layer 114 and a second current collector layer 115, in that order. An insulating member 120 is disposed on at least part of the edge of the electrode stack 110. The second current collector layer 115 extends from the edge of the electrode stack 110 on which the insulating member 120 is disposed, and the second current collector layer 115 is contacted with the edge of the insulating member 120.