Electrochemical Cell Stack Terminal Sealing Under Compression

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing electrochemical cell systems face challenges in transferring electrical energy while maintaining a fluid seal, particularly at high temperatures, due to creep issues with components under tension, leading to potential system failure.

Innovation Solution

An electrochemical cell assembly design that uses compression means to maintain a fluid seal by integrating electrical studs with separate or unitary electrical end plates, where the compression means ensure a seal without the studs needing to be under tension, thus eliminating the need for expensive creep-resistant materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If electrical studs are used to transfer electrical energy through the vessel, then electrical energy transfer is enabled, but maintaining a fluid seal becomes difficult due to material creep under tension at high temperatures

Engineering Contradiction:

Improveelectrical energy transferVSAvoidfluid seal integrity

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent introduces a separate sealing mechanism (sealing element or sealing structure) as an intermediary component between the electrical stud and the vessel wall. This mediator handles the sealing function independently, allowing the electrical stud to focus on electrical energy transfer without compromising seal integrity, even at high temperatures where creep occurs

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent divides the functional requirements into separate components: the electrical stud handles electrical energy transfer while a separate sealing element or structure handles the fluid seal. This segmentation allows each component to be optimized for its specific function, preventing the compromise that occurs when a single component must fulfill multiple conflicting requirements

Inventive Principle:

Principle #1Segmentation

2Reliability

If materials under tension are used to maintain fluid seal around electrical studs, then sealing is achieved, but creep occurs at high temperatures leading to system failure

Engineering Contradiction:

Improvefluid seal integrityVSAvoidsystem operational lifespan

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The sealing element or sealing structure acts as an intermediary that assumes the sealing function, allowing the electrical stud to remain free of tensile loads. This mediator protects the system from creep-related failures by preventing tension from being applied to the electrical connection components at high temperatures

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the traditional mechanical sealing approach (relying on tensioned materials) with an alternative sealing mechanism that does not subject the electrical stud to tensile loads. This substitution eliminates the creep mechanism that would otherwise lead to seal failure and system breakdown over time

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If multiple components under tension are used to maintain seal, then fluid seal is maintained, but device complexity increases

Engineering Contradiction:

Improvefluid seal integrityVSAvoidnumber of components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The sealing element or sealing structure is designed to perform multiple functions: it maintains the fluid seal around the electrical stud, provides structural support, and accommodates thermal expansion. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while maintaining reliable sealing

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 effectively maintains a fluid seal and electrical connectivity without creep-related failures, reducing component complexity and cost by allowing the use of non-creep-resistant materials for the studs.

Implementation Method 1

a fluidic seal is maintained by the compression means between the base portion and the respective one of the base plate and top plate

Methodology Applied

Scientific EffectCompression: Compression

Implementation Method 2

an electrical stud that extends from a base portion of the at least one electrical end plate and passes through an opening in one of the base plate and top plate to form an electrical terminal

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS12620605B2Power connection for electrochemical cell stack

Publication Date: 2026.05.05 CERES INTELLECTUAL PROPERTY COMPANY LIMITED

AI summary

An electrochemical cell assembly (300, 500) comprising a base plate (308) and a top plate (303) between which a stack of planar cell units (306) and at least one positive (302, 507) and at least one negative electrical end plate (302, 507) are disposed in compression by means of compression means (307) acting between the base plate (308) and top plate (303). At least one of the electrical end plates (302, 507) is connected or integrally formed with, and in electrical contact with, an electrical stud (301, 505) that extends from a base portion of the at least one electrical end plate (302, 507) and passes through an opening in one of the base plate (308) and top plate (303) to form an electrical terminal. A fluidic seal is maintained by the compression means (307) between the base portion and the respective one of the base plate (308) and top plate (303), so as to prevent loss of fluid through the opening.