Stacked Solid-State Battery Structure for Adjustable Capacity and Voltage
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Solution Overview
Problem
Conventional solid-state batteries using metal foils as current collectors require multiple batteries to achieve optimal capacity and voltage, which is not feasible in applications with limited installation space, such as automotive applications.
Innovation Solution
A solid-state battery design featuring multiple electrode layers with metal porous bodies as current collectors, where positive and negative electrode portions are alternately stacked with isolation portions to allow for adjustable capacity and voltage within a single battery, and the use of non-ionic conductors and insulating materials to enable series and parallel connections, respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple batteries are combined to achieve optimal capacity and voltage, then the required capacity and voltage can be secured, but the installation space for batteries increases
Solution Approach 1:
The battery is segmented into multiple electrode layers (positive electrode layers and negative electrode layers) that are stacked alternately with solid electrolyte layers. Each electrode layer functions as an independent battery unit, allowing multiple battery units to be integrated within a single battery package, thereby achieving optimal capacity and voltage without increasing installation space.
Solution Approach 2:
Multiple battery units are nested within a single battery structure by stacking electrode layers and solid electrolyte layers alternately. The electrode layers are filled with electrode material mixtures to form multiple functional units that are integrated compactly, enabling multiple batteries to occupy the space of a single battery.
2Device complexity
If metal foil is used as current collector, then the battery structure is simple, but the filling density of electrode active material is low
Solution Approach 1:
Metal porous bodies are used as current collectors instead of conventional metal foils. These porous structures provide a network framework with pores that can be filled with electrode material mixtures, significantly increasing the filling density of electrode active material while maintaining structural simplicity and electrical conductivity.
Solution Approach 2:
The metal porous body provides different functional zones: the porous structure itself serves as the current collector framework, while the pores are filled with electrode material mixtures. This local differentiation allows the same component to simultaneously provide structural support, electrical conductivity, and high active material loading.
3Ease of manufacture
If conventional electrode structure is used, then manufacturing is simple, but capacity and voltage cannot be adjusted within a single battery
Solution Approach 1:
The battery structure is designed with adjustable parameters by varying the number of electrode layers, the stacking sequence of positive and negative electrode layers, and the composition of electrode material mixtures. This dynamic configurability allows capacity and voltage to be adjusted according to application requirements while maintaining a simple stacked manufacturing process.
Solution Approach 2:
The stacked electrode layer structure serves multiple functions: it provides mechanical support, enables electrical connectivity, allows ionic transport through solid electrolyte layers, and facilitates adjustable capacity and voltage. This multi-functional design achieves versatility without complicating the manufacturing process.
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 adjustable capacity and voltage in a single battery, reduces installation space requirements, and enhances the strength and energy density of the battery while preventing ion transfer between electrodes.
Implementation Method 1
a solid electrolyte layer disposed between the electrode layers... the isolation portions are disposed so as to face each other... preventing ion transfer between electrodes
Implementation Method 2
at least one positive electrode portion formed by filling a current collector including a metal porous body with a positive electrode material mixture, at least one negative electrode portion formed by filling a current collector including a metal porous body
Data Source
AI summary
To provide a solid-state battery in which the capacity and voltage can be optionally adjusted in a single battery and the installation space for the battery can be reduced.A solid-state battery includes a plurality of electrode layers, and a solid electrolyte layer disposed between the electrode layers. The electrode layers includes positive electrode portion formed by filling a current collector including a metal porous body with a positive electrode material mixture, negative electrode portion formed by filling a current collector including a metal porous body with a negative electrode material mixture, and an isolation portion formed between the positive electrode portion and the negative electrode portion. Between the plurality of electrode layers disposed adjacent to each other, the positive electrode portion and the negative electrode portion are disposed so as to face each other, and the isolation portions are disposed so as to face each other.