Flat Battery With Protruding Electrode Fixing

Solution Overview

Problem

Conventional flat-shaped batteries face issues with electrode material movement due to vibrations and thermal expansion, leading to reduced discharge performance and potential damage from collisions within the battery case.

Innovation Solution

The battery design incorporates protruding members and an elastic member to securely fix the electrode material within the case, preventing movement and maintaining contact even under external influences like vibrations and thermal expansion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a spring is used to press the positive material against the negative material, then contactability between electrodes is improved, but the positive material may still move due to vibrations and accelerations

Engineering Contradiction:

Improvecontactability between electrodesVSAvoidposition stability of positive material

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The battery case is divided into a positive case and a negative case, with the positive material housed in the positive case and the negative material housed in the negative case, allowing independent positioning and securing of each electrode material

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The protruding members are预先 fixed to the inner surface of the positive case before inserting the positive material, so that when the positive material is inserted, it is automatically positioned and secured by the protruding members, preventing movement due to vibrations and accelerations

Inventive Principle:

Principle #10Preliminary action

2Temperature

If the battery case is expanded by heat, then thermal effects are accommodated, but the positive material becomes more likely to move within the case

Engineering Contradiction:

Improvethermal expansion accommodationVSAvoidposition stability of positive material

Core Design Contradiction:

TemperatureVSStability of the object's composition

Solution Approach 1:

The protruding members are预先 fixed to the inner surface of the positive case before inserting the positive material, so that when the positive material is inserted, it is automatically positioned and secured by the protruding members, preventing movement due to vibrations and accelerations

Inventive Principle:

Principle #10Preliminary action

3Ease of manufacture

If the positive material is placed loosely in the battery case, then ease of assembly is improved, but movement and collision damage occur under external influences

Engineering Contradiction:

Improveassembly easeVSAvoidprotection from collision damage

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The protruding members are预先 fixed to the inner surface of the positive case before inserting the positive material, so that when the positive material is inserted, it is automatically positioned and secured by the protruding members, preventing movement and collision damage

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The protruding members automatically position and secure the positive material through their own structure without requiring additional fixing operations, making the assembly process simple while ensuring reliability

Inventive Principle:

Principle #25Self-service

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 power generation and prevents electrode material damage by securely fixing the electrode material, ensuring reliable operation under various external conditions.

Implementation Method 1

an elastic member which is placed between a surface of the electrode material into which the protruding members are inserted and the inner surface of the battery case to bias the electrode material toward an inner surface opposite to the inner surface of the battery case

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS8043740B2Flat-shaped battery

Publication Date: 2011.10.25 MAXELL LTD

AI summary

The flat-shaped battery includes an electrode material containing an active material, and a battery case which has the electrode material housed inside and in which a plurality of protruding members extending inwardly from an inner surface of the battery case are fixed to the inner surface. The electrode material is housed in the battery case with those individual protruding members inserted in the electrode material. As a result, even if the flat-shaped battery is subjected to such external influences as accelerations and vibrations, the electrode material can securely be prevented from moving within the battery case.