Current Interruption Device Plastic Deformation Portion

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing current interruption devices for electrical energy storage devices face reliability issues due to the detachment of projections from deformable members or changes in characteristics affecting movement accuracy, particularly when the pressure exceeds a predetermined value, leading to unreliable conduction interruption.

Innovation Solution

The current interruption device incorporates a second deformable member with a plastic deformation portion projecting toward the second conductive member, formed through plastic deformation, eliminating the need for a separate projection and reducing characteristic variations, ensuring reliable deformation and contact when pressure exceeds the predetermined value.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a separate projection is attached to the second deformable member, then the projection can be brought into contact with the second conductive member to break it, but the projection may detach during use or welding may affect the movement accuracy of the second deformable member

Engineering Contradiction:

Improvereliability of conduction interruptionVSAvoidstability of projection attachment

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The invention merges the projection function directly into the second deformable member by forming a plastic deformation portion on the second center portion. This eliminates the separate projection component and its attachment issues, resolving the contradiction between reliability and compositional stability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The second deformable member serves its own function of providing the projection through its own plastic deformation. The member deforms itself to create the contact portion that will break the second conductive member, eliminating dependency on external attachments.

Inventive Principle:

Principle #25Self-service

2Strength

If the projection is fixed to the second deformable member by welding, then the projection is securely attached, but characteristics of the second deformable member may vary and movement accuracy may be affected

Engineering Contradiction:

Improveattachment strength of projectionVSAvoidmovement accuracy of second deformable member

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

The invention eliminates the need for welding by integrating the projection function into the second deformable member itself through plastic deformation. This resolves the contradiction by removing the welding process that causes characteristic variations while maintaining the structural integrity needed for accurate movement.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention changes the physical state of the second deformable member through plastic deformation to create the projection. This parameter change (from undeformed to plastically deformed) creates a permanent structural feature without requiring additional joining processes that would affect movement accuracy.

Inventive Principle:

Principle #35Parameter changes

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 configuration enhances the reliability of current interruption by preventing projection detachment and maintaining accuracy, ensuring consistent conduction interruption between electrode terminals and electrodes.

Implementation Method 1

a plastic deformation portion projecting toward the second conductive member is provided on the second center portion of the second deformable member

Methodology Applied

Scientific EffectPlastic deformation: Plasticity

Implementation Method 2

when the pressure in the casing exceeds a predetermined value, the first deformable member is configured to be deformed and the first contact portion is brought into contact with the second conductive member

Methodology Applied

Scientific EffectPressure-induced deformation: Deformation

Data Source

PatentUS9899657B2Current interruption device and electrical energy storage device using the same

Publication Date: 2018.02.20 EAGLE INDS

AI summary

A current interruption device includes a first conductive member, a second conductive member, a first deformable member, and a second deformable member. The first conductive member is fixed to a casing. The second conductive member is disposed at a position opposed to the first conductive member. The first deformable member is in contact with the second conductive member when pressure in the casing is equal to or less than a predetermined value. Further, the first deformable member is brought out of contact with the second conductive member when the pressure in the casing exceeds the predetermined value. A plastic deformation portion deformed in a manner of projecting toward the second conductive member is provided on a center portion of the second deformable member.