Battery Outer Package Deformation for Sealing Plate Stability

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Solution Overview

Problem

The existing methods for manufacturing battery cases often result in unstable joining of the sealing plate to the outer package, leading to potential movement and gaps, which can cause microscopic metal particles to enter the battery, reducing performance and reliability.

Innovation Solution

A manufacturing method that involves abutting and deforming the outer package and sealing plate to securely fit them together, using a fitting step followed by a joining step, where the outer package's first side walls are pressed inward to prevent gaps and ensure stable sealing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If only fitting is performed without deformation, then the manufacturing process is simple, but the sealing plate position is not fixed and gaps occur

Engineering Contradiction:

Improvemanufacturing process simplicityVSAvoidsealing plate position stability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The outer package is pre-deformed to create an inclined surface that guides the sealing plate into the correct position during fitting, ensuring proper alignment before the actual joining operation occurs

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

An inclined surface is introduced as an intermediary feature between the outer package and sealing plate, facilitating smooth fitting and position fixation without requiring complex direct joining mechanisms

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If sealing plate is not firmly fixed, then the joining process is easier, but sputter particles can enter the outer package and reduce battery performance

Engineering Contradiction:

Improvejoining process easeVSAvoidsputter particle contamination

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The fitting step with deformation is performed in advance to create a gap-free interface between the outer package and sealing plate, preventing sputter particle entry during the subsequent joining operation

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The controlled deformation of the outer package, which could be seen as a complexifying factor, actually benefits the process by creating a self-aligning inclined surface that ensures tight fitting and prevents contamination

Inventive Principle:

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

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 method enhances the reliability of the battery by preventing the entry of sputter particles and ensuring a stable seal, thereby maintaining battery performance.

Implementation Method 1

a fitting step for abutting at least one portion of said outer package and said sealing plate and for deforming said outer package and/or said sealing plate so as to fit said outer package and said sealing plate

Methodology Applied

Scientific EffectDeformation: Deformation

Data Source

PatentUS20230129249A1Battery and manufacturing method of this battery

Publication Date: 2023.04.27 PRIME PLANET ENERGY & SOLUTIONS INC

AI summary

A battery whose reliability is suitably enhanced and a manufacturing method of the battery are provided. The manufacturing method of the battery herein disclosed includes a fitting step for abutting at least a portion of an outer package and a sealing plate, and deforming the outer package and/or the sealing plate so as to fit the outer package and the sealing plate, and a joining step for joining the outer package and the sealing plate.