Battery Housing Absorbent Layer Insulation Film Leakage

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Solution Overview

Problem

Existing battery systems face operational safety risks due to inadequate thermal management, leading to temperature deviations and potential short-circuits from leaked cooling liquids, which can cause abnormal reactions and reduce the lifespan of rechargeable batteries.

Innovation Solution

A battery housing design featuring an absorbent layer with an insulation film that includes grooves for fluid permeability, separating live parts from cooling liquids and utilizing a stiffening element to prevent contact, along with a heat exchange member for effective heat dissipation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If cooling devices use cooling liquids to dissipate heat from battery cells, then heat dissipation efficiency is improved, but the risk of short-circuit increases when cooling liquid leaks into the battery housing

Engineering Contradiction:

Improveheat dissipation efficiencyVSAvoidshort-circuit risk

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The patent introduces an absorbent layer as an intermediary substance between the cooling liquid and live battery parts. When cooling liquid leaks, the absorbent layer absorbs it, preventing direct contact with live parts and eliminating the short-circuit risk while maintaining the cooling function

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the harmful effect of cooling liquid leakage into a beneficial process by using the absorbent layer to absorb the leaked liquid. The leakage that would normally cause short-circuits is transformed into a controlled absorption process that protects the battery while maintaining thermal management

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Device complexity

If the battery housing structure is simplified, then manufacturing cost is reduced, but protection against cooling liquid leakage is insufficient

Engineering Contradiction:

Improvehousing structure complexityVSAvoidprotection against leakage

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent merges multiple functions into the battery housing structure: the housing provides both mechanical protection and thermal management functions by integrating the absorbent layer and insulation film directly into the housing structure, eliminating the need for separate protection systems

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The battery housing is designed with multi-functionality: it serves as the structural enclosure, the thermal management system, and the leakage protection system all in one component, reducing overall device complexity while enhancing reliability

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Stability of the object's composition

If insulation film is completely affixed to absorbent layer, then structural stability is improved, but fluid permeability is reduced

Engineering Contradiction:

Improveinsulation film stabilityVSAvoidfluid permeability

Core Design Contradiction:

Stability of the object's compositionVSQuantity of substance

Solution Approach 1:

The patent applies local quality by making the insulation film affixed only in specific regions to the absorbent layer, leaving other regions unaffixed to maintain fluid permeability. This selective affixing provides structural stability where needed while preserving liquid flow paths where required

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 directs leaked cooling liquids away from live parts, enhancing operational safety by preventing short-circuits and maintaining efficient heat dissipation, thus improving the performance and lifespan of rechargeable batteries.

Implementation Method 1

an absorbent layer that is arranged inside the battery housing on the bottom

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 2

a region between two affixed sections provides for a fluid-permeable passage between the insulation film and the absorbent layer

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 3

an insulation film that is arranged on the absorbent layer

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Implementation Method 4

the insulation film is sectionwise affixed to the absorbent layer and a region between two affixed sections provides for a fluid-permeable passage

Methodology Applied

Scientific EffectElectrical insulation: Dielectric

Implementation Method 5

a heat exchange member for effective heat dissipation

Methodology Applied

Scientific EffectHeat conduction: Conduction (thermal)

Implementation Method 6

cooling devices for effectively emitting/discharging/dissipating heat from the cells

Methodology Applied

Scientific EffectConvection: Convection

Data Source

PatentEP3355380B1Battery housing with absorbent and insulator

Publication Date: 2019.06.19 SAMSUNG SDI CO LTD

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AI summary

The present invention refers to a housing (200) for a battery. In order to improve operational safety in case a coolant leakage occurs, the housing (200) comprises an absorbent layer (230) on its bottom (220) and an insulation film (240) that covers a section of the absorbent layer (230).