Electrode Assembly Fixation with Elastic Force Feedback Control

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Solution Overview

Problem

Existing secondary battery manufacturing processes face issues with performance degradation due to inadequate fixation of electrode assemblies, leading to defects and potential misalignment during the manufacturing process.

Innovation Solution

A secondary battery manufacturing device equipped with a holding device that elastically supports the electrode assembly using an elastic member and sensing members to monitor and regulate the elastic force, preventing excessive pressure and misalignment through a controller that compares detected forces with preset standards.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the electrode assembly is fixed with strong pressing force, then the fixation stability is improved, but the risk of deformation and damage to the electrode assembly increases

Engineering Contradiction:

Improvefixation stabilityVSAvoiddeformation and damage

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The pressing force application mechanism is designed to be dynamic rather than static. The pressing member can adjust its position and apply force at different stages of the manufacturing process, allowing the system to adapt to the electrode assembly's positioning needs without causing deformation. The force is applied progressively and can be released when positioning is complete.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The pressing force parameters are carefully controlled and varied throughout the manufacturing process. The force magnitude, application duration, and distribution are adjusted as parameters to achieve optimal fixation without exceeding thresholds that would cause damage. This includes using different force levels for different stages of assembly.

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If the pressing force is increased to prevent misalignment, then the positioning precision is improved, but the fixation force control becomes difficult and may cause damage

Engineering Contradiction:

Improvepositioning precisionVSAvoidfixation force control

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

Sensing members are integrated into the pressing mechanism to detect the actual pressing force in real-time and provide feedback to the control system. This feedback loop allows the controller to adjust the pressing force dynamically, maintaining optimal positioning precision while preventing excessive force that would cause damage or make control difficult.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The manual or simple mechanical force control is replaced with an automated control system that uses sensors and controllers to precisely regulate the pressing force. This substitution of mechanical control with sensor-based control enables more precise and reliable force management.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If the elastic member is designed with high elastic force, then the fixation reliability is improved, but the detection of force degradation becomes more difficult

Engineering Contradiction:

Improvefixation reliabilityVSAvoidforce degradation detection

Core Design Contradiction:

ReliabilityVSDifficulty of detecting and measuring

Solution Approach 1:

The sensing member continuously monitors the elastic force generated by the elastic member and provides real-time feedback to the control system. This enables early detection of force degradation even in high-force applications, allowing the system to maintain reliable fixation by adjusting parameters or alerting operators before fixation quality deteriorates.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The sensing system is configured to detect force degradation before it affects fixation quality. By monitoring the elastic force continuously, the system can take preliminary actions such as adjusting pressing parameters or generating warnings before the fixation becomes unreliable, thus maintaining high reliability throughout the manufacturing process.

Inventive Principle:

Principle #10Preliminary action

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

The device effectively prevents defects in electrode assembly fixation and detects decreases in fixation force, ensuring stable manufacturing by generating alarms for abnormal conditions, thereby enhancing the manufacturing process efficiency and product quality.

Implementation Method 1

an elastic member which is disposed on one side of the holding device to apply an elastic force to the holding device

Methodology Applied

Scientific EffectElastic force: Elasticity

Implementation Method 2

a first sensing member configured to detect an elastic force applied by the elastic member

Methodology Applied

Scientific EffectForce detection:

Data Source

PatentUS20250300211A1Secondary battery manufacturing device and secondary battery manufacturing method

Publication Date: 2025.09.25 SK ON CO LTD

AI summary

A secondary battery manufacturing device according to various embodiments of the present disclosure may include: a holding device configured to elastically support an electrode assembly; an clastic member which is disposed on one side of the holding device to apply an elastic force to the holding device; and a first sensing member configured to detect an clastic force applied by the clastic member.