Battery Electrode Hole Structure for Self-Binding Separator

Solution Overview

Problem

The movement of a battery within an electronic device due to shock can cause a slip between electrode plate layers, leading to a short circuit and potential heat or ignition, which existing solutions attempt to address with additional adhesives or tapes, increasing cost and reducing capacity.

Innovation Solution

A battery design featuring a hole structure in the uncoated portions of the positive and negative electrodes, with the binder on the separators combining through these holes to enhance binding force without additional components, and applying adhesive to the holes for increased adhesion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If additional adhesives or tapes are used to prevent battery movement and electrode plate slip, then reliability is improved, but device complexity and cost increase

Engineering Contradiction:

Improveprevention of short circuitVSAvoidadditional components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The separator binder automatically combines with electrode plate binders through the holes in the uncoated portions during battery assembly, creating self-binding without requiring additional adhesives or tapes. The separator's own binder material serves the dual function of separation and mechanical bonding.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Holes are formed in the uncoated portions of the electrode plates, creating a porous structure that allows the separator binder to pass through and combine with electrode plate binders, establishing mechanical interlocking and strengthening the binding force between components.

Inventive Principle:

Principle #31Porous materials

2Strength

If additional adhesives or tapes are applied to strengthen binding, then strength is improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improvebinding forceVSAvoidalignment accuracy

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

The separator binder automatically combines with electrode plate binders through the holes in the uncoated portions during battery assembly, creating self-binding without requiring additional adhesives or tapes. The separator's own binder material serves the dual function of separation and mechanical bonding.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Holes are formed in the uncoated portions of the electrode plates, creating a porous structure that allows the separator binder to pass through and combine with electrode plate binders, establishing mechanical interlocking and strengthening the binding force between components.

Inventive Principle:

Principle #31Porous materials

3Device complexity

If the battery structure is simplified without additional components, then device complexity is reduced, but reliability may deteriorate

Engineering Contradiction:

Improvenumber of componentsVSAvoidprevention of electrode slip

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The separator binder automatically combines with electrode plate binders through the holes in the uncoated portions during battery assembly, creating self-binding without requiring additional adhesives or tapes. The separator's own binder material serves the dual function of separation and mechanical bonding.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Holes are formed in the uncoated portions of the electrode plates, creating a porous structure that allows the separator binder to pass through and combine with electrode plate binders, establishing mechanical interlocking and strengthening the binding force between components.

Inventive Principle:

Principle #31Porous 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

This design stabilizes battery performance by strengthening the binding force between electrode plates and separators, preventing short circuits and maintaining capacity without additional components, thus ensuring balanced charged energy and durability.

Implementation Method 1

a binder coated on a first separator distal end disposed on one surface of the electrode plate and a second separator distal end disposed on another surface thereof are combined through the hole, strengthening the binding force

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS20230057433A1Electronic device including battery

Publication Date: 2023.02.23 SAMSUNG ELECTRONICS CO LTD

AI summary

A battery is provided. The battery includes a negative electrode including a first coating portion coated with a negative electrode active material and a first uncoated portion disposed adjacent to the first coating portion, a positive electrode disposed to face the negative electrode and including a second coating portion coated with a positive electrode active material and a second uncoated portion disposed adjacent to the second coating portion, a first separator disposed between one surface of the negative electrode and one surface of the positive electrode, and a second separator disposed on another surface of the negative electrode. The positive electrode, the negative electrode, and the at least one of the first separator and the second separator may be prepared in a roll shape formed by winding.