Flexible Electrochemical Device Pack Ribbon Lead Wire

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Solution Overview

Problem

There is a need for a flexible electrochemical device pack with high capacity to power wearable electronic devices, which can withstand repeated shape deformations and maintain durability and reliability.

Innovation Solution

A flexible electrochemical device pack is designed with lead wires having a ribbon shape and bent portions, connecting multiple electrochemical devices in parallel, allowing for high durability and energy density through minimized volume occupation and flexible deformation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If multiple electrochemical devices are connected in parallel with traditional lead wires, then the capacity increases, but the volume occupation increases and flexibility decreases

Engineering Contradiction:

ImprovecapacityVSAvoidvolume occupation

Core Design Contradiction:

Quantity of substanceVSVolume of moving object

Solution Approach 1:

The lead wire is transformed from a traditional three-dimensional wire structure into a two-dimensional ribbon shape. This dimensional change allows the lead wire to occupy less volume while maintaining electrical connectivity between multiple electrochemical devices connected in parallel, thereby increasing capacity without proportionally increasing volume occupation.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The lead wire is designed as a thin ribbon structure with high flexibility, allowing it to be bent and adapted to various spatial configurations. This enables compact arrangement of multiple electrochemical devices in parallel connection, maximizing capacity while minimizing the overall volume occupation of the device pack.

Inventive Principle:

Principle #30Flexible shells and thin films

2Reliability

If traditional rigid lead wires are used to connect electrochemical devices, then the electrical connection is stable, but the device cannot withstand repeated shape deformations

Engineering Contradiction:

Improveelectrical connection stabilityVSAvoiddurability under deformation

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The rigid wire is replaced with a flexible ribbon-shaped lead wire that can bend and deform repeatedly without breaking. This flexible structure maintains stable electrical connection between electrochemical devices while withstanding repeated shape deformations, improving both reliability and durability of the device pack.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The physical parameters of the lead wire are changed from traditional wire dimensions to a ribbon shape with specific width and thickness ratios. This parameter optimization provides both flexibility for deformation and sufficient mechanical strength to maintain electrical connection stability under repeated bending and shaping operations.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the lead wire is made thicker to reduce resistance, then the electrical conductivity improves, but the flexibility and energy density decrease

Engineering Contradiction:

Improveelectrical conductivityVSAvoidflexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The lead wire is designed as a thin ribbon structure that maintains good electrical conductivity through optimized material composition and cross-sectional geometry. The ribbon shape provides high flexibility and adaptability while achieving sufficient conductivity for parallel-connected electrochemical devices, avoiding the need for thicker wires that would reduce flexibility and energy density.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The lead wire utilizes composite material structure or material composition optimization to achieve high electrical conductivity in a thin ribbon form. This allows the lead wire to maintain low resistance for reliable electrical connection while preserving the flexibility and thin profile needed for high energy density and adaptability in wearable device applications.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS10396333B2Flexible electrochemical device pack

Publication Date: 2019.08.27 SAMSUNG ELECTRONICS CO LTD

AI summary

An electrochemical device pack includes first and second electrochemical devices disposed in a length direction, where each of the first and second electrochemical devices has a top surface and a bottom surface in a thickness direction; and a first lead wire which has a ribbon shape, extends substantially in the length direction, and has a first surface and a second surface in the thickness direction. The first electrochemical device includes first and second electrode terminals exposed to an outside thereof, the second electrochemical device includes first and second electrode terminals exposed to an outside thereof, the first lead wire is electrically connected to the first electrode terminal of the first electrochemical device and the first electrode terminal of the second electrochemical device, and the first surface or the second surface of the first lead wire faces the top surface or bottom surface of the first electrochemical device.