Battery Package Blackbody Layer Heat Radiation

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Solution Overview

Problem

Nonaqueous electrolyte batteries face challenges in heat dissipation, leading to safety concerns due to the trade-off between battery capacity and performance, with existing techniques focusing primarily on heat conduction and transfer, neglecting the significant potential of heat radiation for high-temperature environments.

Innovation Solution

Incorporating a blackbody material with an emissivity of 0.6 or more into the battery package member, specifically in the laminate film, to enhance heat dissipation through radiation, which is particularly effective at high temperatures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If battery capacity is increased to reduce size and weight, then energy density is improved, but heat generation increases leading to safety concerns

Engineering Contradiction:

Improveenergy densityVSAvoidheat generation

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The package member is divided into multiple functional layers including a heat radiation layer with high emissivity material, a heat conduction layer with metal foil, and a heat dissipation layer with heat sink structure. This segmentation allows each layer to address specific heat management aspects while maintaining high battery capacity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A heat radiation layer containing blackbody material with emissivity of 0.6 or more is introduced as an intermediary between the battery element and the external environment. This layer mediates heat transfer by radiating heat efficiently to the surroundings, addressing the heat generation problem without compromising energy density.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Temperature

If heat conduction and transfer techniques are used to improve heat dissipation, then temperature control is improved, but the potential of heat radiation is neglected

Engineering Contradiction:

Improvetemperature controlVSAvoidheat dissipation mechanism

Core Design Contradiction:

TemperatureVSAdaptability or versatility

Solution Approach 1:

The package member employs a composite structure combining multiple heat dissipation mechanisms: a heat radiation layer with high-emissivity blackbody material (emissivity ≥0.6), a heat conduction layer with metal foil for thermal conduction, and a heat dissipation layer with heat sink structure. This composite approach integrates radiation, conduction, and convection mechanisms for comprehensive temperature control.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The emissivity parameter of the heat radiation layer is optimized to be 0.6 or more, significantly enhancing the radiation heat transfer capability. This parameter change allows the system to effectively utilize thermal radiation for heat dissipation, complementing the conduction and convection mechanisms.

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If blackbody material with high emissivity is incorporated into the package member, then heat radiation is enhanced, but device complexity increases

Engineering Contradiction:

Improveheat radiationVSAvoidpackage structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The heat radiation layer is constructed as a thin film or coating containing blackbody material particles dispersed in a resin matrix. This thin-film approach enhances heat radiation capability while minimizing the increase in device complexity and maintaining flexibility of the package member.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The blackbody material is combined with a resin material to form a composite heat radiation layer that can be integrated into the existing package member structure. This composite approach enhances radiation heat transfer without significantly complicating the overall device design.

Inventive Principle:

Principle #40Composite materials

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 use of blackbody materials in the battery package member effectively suppresses temperature increases and improves safety by enhancing heat dissipation characteristics, particularly at high temperatures, without compromising battery performance.

Implementation Method 1

the package member has a layer which contains a blackbody material capable of using blackbody radiation and which has an emissivity of 0.6 or more

Methodology Applied

Scientific EffectBlackbody radiation: Thermal Radiation

Data Source

PatentUS10305071B2Battery package including blackbody material layer and nonaqueous electrolyte battery including the same

Publication Date: 2019.05.28 MURATA MFG CO LTD

AI summary

A nonaqueous electrolyte battery and a battery package are provided. The nonaqueous electrolyte battery includes a battery element; a nonaqueous electrolyte; and a battery package configured to accommodate the battery element, wherein the battery package includes a first layer; a second layer including a carbon material; and a metal layer, wherein the second layer is directly provided on the metal layer.