Parallel Solid-State Battery Cell Stack With Short-Circuit Isolation
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Solution Overview
Problem
Conventional batteries face challenges in enhancing performance, particularly in preventing short circuits, managing capacity differences among cells, and achieving high current characteristics.
Innovation Solution
A battery design featuring parallel-connected battery cells with alternating electrode and solid electrolyte layer configurations, along with insulating and terminal electrodes to prevent short circuits and optimize current flow, and a method of manufacturing that includes forming a layered body with these configurations to ensure accurate cell connections and reduced material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple battery cells are connected in parallel to improve current characteristics, then high current characteristics are improved, but the risk of short circuits between cells increases
Solution Approach 1:
An insulating member is introduced as an intermediary between adjacent battery cells to prevent direct contact and short circuits. The insulating member is positioned between the electrode layers of adjacent cells, creating a physical barrier that eliminates the harmful electrical connection while allowing the cells to maintain their parallel configuration for high current output.
2Quantity of substance
If battery cells are stacked closely to increase energy density, then energy density is improved, but manufacturing precision requirements increase
Solution Approach 1:
The insulating member is pre-positioned between the electrode layers of adjacent battery cells before final assembly. This preliminary action ensures that the cells are correctly oriented and spaced, reducing the precision requirements during the stacking process and simplifying manufacturing while maintaining high energy density.
3Reliability
If insulating members are added between battery cells to prevent short circuits, then reliability is improved, but device complexity increases
Solution Approach 1:
The insulating member serves multiple functions simultaneously: it prevents short circuits between adjacent cells, maintains proper spacing between cells, and provides structural support during assembly. By combining these functions into a single component, the design avoids increasing overall complexity while achieving improved reliability.
Data Source
AI summary
A battery includes: a power generation element including battery cells which are electrically connected in parallel and stacked, and each of which includes an electrode layer, a counter-electrode layer, and a solid electrolyte layer located between the electrode layer and the counter-electrode layer; an electrode insulating layer covering an electrode layer among the electrode layers at a side surface of the power generation element; and a counter-electrode terminal covering the side surface and the electrode insulating layer, and electrically connected to a counter-electrode layer among the counter-electrode layers.