Battery Sealing Member With Vent Path for Reliable Swaging

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Solution Overview

Problem

In existing battery manufacturing processes, insufficient swaging of the sealing member to the exterior container can lead to inadequate sealing, compromising the integrity of the battery.

Innovation Solution

A battery design that includes a sealing member with a protrusion embedded in a seal component, featuring communication paths to allow for the ejection of electrolyte solution during swaging, thereby preventing insufficient swaging and ensuring a secure seal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the sealing member is fixed to the exterior container by swaging, then the injection hole can be sealed, but insufficient swaging may occur leading to inadequate sealing

Engineering Contradiction:

Improvesealing reliabilityVSAvoidswaging precision

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

A communication path is formed in the protrusion or seal component before swaging to allow residual electrolyte solution to be ejected. This preliminary action ensures that the swaging process can proceed completely without pressure buildup, preventing insufficient swaging and ensuring reliable sealing.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The seal component acts as an intermediary between the protrusion and the exterior container. It provides a controlled communication path that allows electrolyte ejection during swaging, mediating the sealing process to ensure complete fixation without compromising sealing integrity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the sealing member is fixed by welding, then sealing can be achieved, but the structure becomes more complex

Engineering Contradiction:

Improvesealing reliabilityVSAvoidsealing structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention replaces the welding process (thermal/mechanical system) with a swaging process (mechanical deformation system). The sealing member is fixed by cold swaging that deforms the material to create a secure mechanical interlock, eliminating the need for welding equipment and processes while maintaining sealing reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention changes the fixation method from welding (high temperature, phase change) to swaging (cold deformation, plastic flow). This parameter change simplifies the overall structure by eliminating welding-related components and processes while achieving reliable sealing through mechanical deformation and the embedded protrusion design.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP4117107B1battery

Publication Date: 2026.05.06 PRIME PLANET ENERGY & SOLUTIONS INC

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AI summary

In a state in which a sealing member (900) is fixed to an exterior container (100) by swaging, at least a tip side of a protrusion (930) is embedded in a seal component (1000). In a state before the sealing member (900) is fixed to the exterior container (100) by swaging, when the protrusion (930) of the sealing member (900) and the seal component (1000) are brought into abutment with each other, a communication path (940, 1010) is formed in the protrusion (930) or the seal component (1000) to communicate a space inside the exterior container (100) and a space outside the exterior container (100) with each other.