Battery Cell With Inert Particle Coating for Flexible Mounting

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Solution Overview

Problem

Conventional pouch-shaped battery cells are inflexible and may experience wrinkles or electrolyte leakage when mounted in devices with curved or varied designs, leading to potential dielectric breakdown and safety issues.

Innovation Solution

A battery cell with an electrode assembly coated with inert particles forming a concave-convex structure on its outer surfaces, which also extends to the cell case, increasing the surface area and preventing wrinkles, thereby enhancing safety and preventing electrolyte leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a conventional pouch-shaped battery cell is mounted in a device with curved or varied design, then the battery can be integrated into diverse device shapes, but the battery cell may experience wrinkles or electrolyte leakage leading to dielectric breakdown and safety issues

Engineering Contradiction:

Improveadaptability to device shapesVSAvoidsafety and integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

A coating layer comprising inert particles is formed on the outer surface of the electrode assembly before mounting in the device. This coating acts as a cushioning layer that prevents wrinkles and maintains the integrity of the battery cell during deformation, thereby preventing electrolyte leakage and dielectric breakdown while enabling adaptation to curved or varied device shapes

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Ease of operation

If the battery cell is made flexible to fit various device shapes, then the battery can be deformed to match device contours, but unintentional wrinkles may form causing electrolyte leakage and safety hazards

Engineering Contradiction:

Improveflexibility for mountingVSAvoidwrinkles and electrolyte leakage

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The coating layer with inert particles is applied in advance to the electrode assembly outer surface. This pre-applied coating serves as a protective cushion that absorbs deformation stresses during mounting, preventing the formation of wrinkles that could lead to electrolyte leakage, while still allowing the battery to be flexed to match device contours

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If the electrode assembly outer surface is coated with inert particles, then wrinkles are prevented and safety is enhanced, but the manufacturing process becomes more complex

Engineering Contradiction:

Improvesafety and integrityVSAvoidcoating process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The coating layer comprises inert particles that form a porous or particulate structure on the electrode assembly outer surface. This particulate coating can be applied using conventional coating techniques and provides effective protection against wrinkles and electrolyte leakage without requiring overly complex manufacturing processes

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The coating layer is formed as a composite structure combining inert particles with a binder or matrix material. This composite approach enhances the protective functionality while maintaining manufacturing feasibility through established coating processes

Inventive Principle:

Principle #40Composite materials

Data Source

PatentEP3096386B1Battery cell comprising electrode assembly coated with inert particles

Publication Date: 2019.07.31 LG CHEM LTD

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AI summary

Disclosed herein is a battery cell having an electrode assembly mounted in a variable cell case in a state in which the electrode assembly is impregnated with an electrolyte, the battery cell being configured to be flexibly deformed in response to the shape of a device, in which the battery cell is mounted, wherein a coating part including inert particles is formed on at least one outer surface of the electrode assembly.