Solid-State Battery Stack Fixing for Unit Displacement Control
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Solution Overview
Problem
Existing all-solid-state batteries face issues with positional displacement of battery units due to vibration and expansion, leading to potential short-circuiting, while existing adhesive solutions reduce structural efficiency.
Innovation Solution
An all-solid-state battery design where the fixing unit is in contact with the electrode layers of adjacent battery units, specifically at the end faces of current collector layers, using a resin-based adhesive to secure the units without reducing structural efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If adhesive means are provided on mutually-opposed faces of adjacent battery units to suppress positional displacement, then positional stability is improved, but the number of battery units that can be accommodated is reduced due to the adhesive occupying space among the units
Solution Approach 1:
The invention extracts the adhesive means from the interface between battery units and relocates it to the outer surface of the battery case. This allows the adhesive to perform its fixing function without occupying space within the battery assembly, thereby resolving the contradiction between positional stability and the number of accommodated units.
Solution Approach 2:
The battery case serves as an intermediary structure that carries the adhesive means on its outer surface. This mediator approach allows the adhesive to fix the battery units indirectly through the case structure, eliminating the need for adhesive placement between units and maximizing space utilization.
2Stability of the object's composition
If adhesive means are disposed among multiple battery units to fix adjacent units, then positional displacement is suppressed, but structural efficiency of the battery is reduced
Solution Approach 1:
The adhesive means is extracted from the internal structure between battery units and relocated to the external surface of the battery case. This eliminates the complexity introduced by internal adhesive placement while maintaining the positional stability function, thereby improving structural efficiency.
3Quantity of substance
If battery units are stacked to increase capacity, then energy storage is improved, but positional displacement occurs due to vibration and expansion during use
Solution Approach 1:
The battery case acts as an intermediary structure that provides a stable external framework. By placing adhesive means on the case's outer surface, the case mediates between the stacked battery units and the external environment, preventing positional displacement caused by vibration and expansion while allowing maximum unit accommodation.
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 suppresses positional displacement of battery units, maintaining structural efficiency and reducing the risk of short-circuiting, while allowing for a higher number of units to be accommodated in the battery case.
Implementation Method 1
the fixing unit includes resin
Data Source
AI summary
The all-solid-state battery includes a stack of a plurality of battery units including a first current collector layer, an electrode layer, a second current collector layer, an electrode layer, and a first current collector layer in this order. The stacked body includes a battery unit X and a battery unit Y that are adjacent to each other, and a fixing unit that fixes the battery unit X and the battery unit Y. The fixing unit is in contact with the electrode layer of the battery unit X and the electrode layer of the battery unit Y, respectively.