Density-Graded Solid Electrolyte Battery for Thermal Uniformity

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional batteries face challenges in efficiently dissipating heat and maintaining uniform temperature, leading to performance deterioration and reduced service life due to non-uniform temperature distribution within the battery.

Innovation Solution

A battery design featuring a solid electrolyte layer with distinct regions of varying densities, where a higher density region is positioned on the outer peripheral side to enhance thermal conductivity and improve heat dissipation, while also increasing the strength and environmental resistance by blocking external air ingress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a uniform density solid electrolyte layer is used, then the manufacturing process is simple, but heat dissipation is poor and temperature uniformity deteriorates

Engineering Contradiction:

Improvetemperature uniformityVSAvoidsolid electrolyte layer structure

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The solid electrolyte layer is designed with spatially varying density: a first density in the central region and a second density (higher than the first) in the outer peripheral region. This local quality differentiation enables the outer region to serve as an efficient heat dissipation pathway while the central region maintains ion conduction function, thereby resolving the contradiction between temperature uniformity and structural complexity.

Inventive Principle:

Principle #3Local quality

2Strength

If the outer peripheral region has lower density, then ion conduction is good, but strength and environmental resistance deteriorate

Engineering Contradiction:

Improvesolid electrolyte layer strengthVSAvoidion conduction performance

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent applies local quality by assigning different density characteristics to different regions: the outer peripheral region has higher density for strength and environmental resistance, while the central region maintains appropriate density for ion conduction. This regional differentiation resolves the contradiction between mechanical strength and ion conduction reliability.

Inventive Principle:

Principle #3Local quality

3Object-generated harmful factors

If the solid electrolyte layer has high density throughout, then strength and environmental resistance improve, but heat dissipation capability worsens

Engineering Contradiction:

Improveheat generationVSAvoidsolid electrolyte layer strength

Core Design Contradiction:

Object-generated harmful factorsVSStrength

Solution Approach 1:

The patent resolves this contradiction by creating a density gradient: the outer peripheral region has higher density to provide structural strength and environmental resistance, while the central region has lower density to facilitate heat dissipation. This local differentiation allows the structure to simultaneously achieve mechanical integrity and thermal management.

Inventive Principle:

Principle #3Local quality

4Power

If the battery operates at high power, then energy output increases, but heat generation and temperature non-uniformity worsen

Engineering Contradiction:

Improvebattery power outputVSAvoidtemperature distribution uniformity

Core Design Contradiction:

PowerVSTemperature

Solution Approach 1:

The density-varying solid electrolyte layer structure enables the battery to maintain temperature uniformity during high-power operation by providing efficient heat dissipation pathways in the outer peripheral region, thus resolving the contradiction between power output and temperature distribution uniformity.

Inventive Principle:

Principle #3Local quality

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 in the center portion to the outer rim, maintaining temperature uniformity, thereby extending battery life and enhancing strength and environmental resistance.

Implementation Method 1

the second region is positioned on an outer peripheral side of the region where the electrode layer and the counter electrode layer face each other... the second density is higher than a first density... effectively dissipates heat generated in the center portion to the outer rim

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS11888158B2Battery

Publication Date: 2024.01.30 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

A battery includes an electrode layer, a counter electrode layer, which is a counter electrode for the electrode layer, and a solid electrolyte layer between the electrode layer and the counter electrode layer. The solid electrolyte layer has a first region containing a first solid electrolyte material and a second region containing a second solid electrolyte material. The first region is positioned within a region where the electrode layer and the counter electrode layer face each other. The second region is positioned on an outer peripheral side of the region where the electrode layer and the counter electrode layer face each other, and is in contact with the first region. The first region includes a first projecting portion that projects outward from a region where the electrode layer and the counter electrode layer face each other, and the second region covers the first projecting portion.