Solid State Battery Pressure Plate Assembly for Dendrite Prevention
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Solution Overview
Problem
Portable information handling systems face challenges in maintaining efficient battery performance and preventing dendrite formation in solid state batteries, which affect energy density and cycle life, especially in Li-Metal batteries where structural changes occur during charging and discharging.
Innovation Solution
Incorporating a pressure plate assembly with elastomer layers between the solid state battery and pressure plates to apply a controlled compressive force, which helps maintain the interface integrity and prevent dendrite formation, using materials with high stiffness and specific weight considerations for portable devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure plate assembly with elastomer layers is used to apply compressive force to maintain interface integrity and prevent dendrite formation, then reliability and battery life are improved, but device complexity and weight increase
Solution Approach 1:
The pressure plate assembly is segmented into multiple functional layers: rigid pressure plates for structural support and force application, and elastomer layers for compliance and uniform pressure distribution. This segmentation allows each layer to perform its specific function optimally while working together to prevent dendrite formation and maintain interface integrity throughout battery cycling.
Solution Approach 2:
The elastomer layers act as intermediary elements between the rigid pressure plates and the battery components. These elastomer intermediaries transmit the compressive force from the pressure plates while accommodating dimensional changes during charging and discharging, ensuring uniform pressure distribution without direct rigid contact between the pressure plates and battery electrodes.
2Stability of the object's composition
If high stiffness materials are used for pressure plates to maintain compressive force, then interface integrity is improved, but weight increases for portable devices
Solution Approach 1:
The pressure plate assembly uses composite construction combining rigid materials (for maintaining compressive force and interface integrity) with elastomeric materials (for compliance and weight reduction). This composite approach allows the system to achieve the necessary mechanical stability while keeping the overall weight acceptable for portable information handling systems.
Solution Approach 2:
Different regions of the pressure plate assembly have different material properties optimized for their specific functions: the pressure plates themselves use high-stiffness materials where structural support is critical, while the elastomer layers use softer, more compliant materials where flexibility and weight reduction are beneficial. This local differentiation of material quality optimizes the overall performance-weight ratio.
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 solution enhances energy density, temperature tolerance, and recharge speed of solid state batteries by maintaining interface integrity and preventing dendrite formation, thereby extending battery life and performance in portable information handling systems.
Implementation Method 1
a first elastomer layer between the first pressure plate and the first major surface of the solid state battery; a second elastomer layer between the second pressure plate and the second major surface of the solid state battery. The first and second pressure plates can be configured to provide a compressive force to the solid state battery
Data Source
AI summary
An information handling system includes a solid state battery having a first major surface and a second major surface opposite the first major surface; a first pressure plate; a first elastomer layer between the first pressure plate and the first major surface of the solid state battery; a second pressure plate; and a second elastomer layer between the second pressure plate and the second major surface of the solid state battery, the first and second pressure plates configured to provide a compressive force to the solid state battery.