Semi-Solid Electrochemical Cell Packaging With Gas Vent Holes

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Solution Overview

Problem

Existing electrochemical cells face challenges in efficiently managing gas buildup during charging and discharging processes, leading to reduced battery capacity and efficiency due to the inability to effectively vent gases generated within the cell.

Innovation Solution

The electrochemical cell design incorporates a packaging body with strategically positioned holes that allow gas to escape, reducing buildup between electrodes and collectors, and includes a three-layer or two-layer structure with specific materials to enhance strength and safety, while using semi-solid electrodes for improved performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the electrochemical cell uses a sealed packaging body to encase the power-generating element, then safety and structural integrity are improved, but gas buildup occurs during charging and discharging processes

Engineering Contradiction:

ImprovesafetyVSAvoidgas buildup

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent extracts the harmful gas from the sealed packaging by introducing holes in the packaging body. These holes allow gas to escape from the interior of the packaging during charging and discharging processes, eliminating the gas buildup problem while maintaining the protective enclosure.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent converts the harmful gas buildup into a beneficial gas escape mechanism. By strategically positioning holes in the packaging body, the gas that would otherwise cause harm is now channeled through controlled pathways, allowing it to escape safely and even potentially be utilized for pressure equalization or venting functions.

Inventive Principle:

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

2Strength

If the packaging body is made with multiple layers to enhance strength and safety, then structural integrity is improved, but device complexity increases

Engineering Contradiction:

Improvestructural integrityVSAvoidpackaging structure

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The packaging body is segmented into multiple layers, each serving specific functions. The first packaging portion and second packaging portion are separated by a predetermined distance, creating distinct functional zones. This segmentation allows each layer to be optimized for specific purposes while maintaining overall structural integrity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the packaging body have different properties. The holes are strategically positioned in specific locations rather than uniformly distributed, allowing gas to escape from targeted areas. The packaging portions have different structural characteristics to optimize both strength and gas venting functionality.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12519176B2Electrochemical cell and electrochemical cell stack

Publication Date: 2026.01.06 KYOCERA CORP

AI summary

An electrochemical cell includes a power-generating element including a semi-solid positive electrode, a semi-solid negative electrode, a separator located between the semi-solid positive electrode and the semi-solid negative electrode, a positive-electrode current collector electrically connected to the semi-solid positive electrode, and a negative-electrode current collector electrically connected to the semi-solid negative electrode; and a packaging body which encases the power-generating element, the packaging body including single or plural holes which open on an inner side of the packaging body and an outer side of the packaging body.