Modular Anode Power Control for Vehicle Electrodeposition

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Solution Overview

Problem

Conventional drag through electro-deposition systems for vehicle bodies have limited process controllability and high costs due to the use of few high-power rectifiers, making them inefficient for high-volume production, and index tank systems have low throughput, which is not suitable for high-volume vehicle production.

Innovation Solution

A drag through electro-deposition system with multiple pairs of anodes and individual power supplies, allowing for precise control of voltage and current to each anode pair based on the vehicle's position, enabling modular and adjustable power distribution for optimal coating.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If conventional drag through systems use few high-power rectifiers, then system simplicity is maintained, but process controllability and manufacturing precision deteriorate

Engineering Contradiction:
Improvenumber of rectifiersVSAvoidcoating uniformity
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The patent divides the electro-deposition system into multiple independently controllable power supply modules, each serving specific anode pairs. This segmentation allows precise control of electrical parameters for different vehicle body sections, achieving uniform coating quality while maintaining reasonable system complexity through modular architecture.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system dynamically adjusts voltage and current parameters for each power supply module based on real-time vehicle body position monitoring. This dynamic control ensures optimal coating conditions are maintained as the vehicle moves through the electrolyte bath, resolving the contradiction between system simplicity and coating precision.

Inventive Principle:
Principle #15Dynamics

2Manufacturing precision

If index tank systems use multiple anode pairs with direct current sources, then coating precision is improved, but productivity decreases

Engineering Contradiction:
Improvecoating qualityVSAvoidthroughput rate
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The patent implements periodic action by sequentially activating different power supply modules as the vehicle body progresses through the electrolyte bath. This allows continuous high-volume production while maintaining precise coating control, as each module operates in controlled intervals rather than all simultaneously, thereby increasing throughput without sacrificing quality.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The system maintains continuous useful action by ensuring that as one power supply module completes its coating task, another module is already positioned to continue the process. This continuous operation eliminates idle time and maintains high productivity while preserving coating precision through controlled sequential activation.

Inventive Principle:
Principle #20Continuity of useful action

3Productivity

If drag through systems use high current to multiple anodes, then productivity is maintained, but system adaptability and reliability worsen

Engineering Contradiction:
Improveproduction volumeVSAvoidsystem flexibility
Core Design Contradiction:
ProductivityVSAdaptability or versatility

Solution Approach 1:

By segmenting the power distribution into multiple independent modules, the system can selectively activate only the modules needed for current production requirements. This segmentation provides adaptability to accommodate different production volumes and vehicle types while maintaining high productivity through parallel operation of multiple modules.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The dynamic allocation of electrical load across multiple power supply modules based on real-time production needs enables the system to adapt flexibly to varying production volumes. The system can scale power distribution dynamically, maintaining high productivity when needed while preserving adaptability to different production scenarios.

Inventive Principle:
Principle #15Dynamics

4Reliability

If conventional systems use limited rectifier backup, then cost is reduced, but reliability deteriorates

Engineering Contradiction:
Improvesystem availabilityVSAvoidbackup system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The modular power supply architecture naturally provides redundancy, as failure of one module does not cripple the entire system. Other modules can continue operating, maintaining system availability without requiring complex dedicated backup systems, thus improving reliability while controlling complexity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system incorporates built-in redundancy through its modular design, cushioning against potential failures before they occur. This prior cushioning approach ensures continued operation during module failures without requiring complex external backup systems, balancing reliability improvement with controlled complexity.

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

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 solution allows for efficient high-volume production with improved anode longevity, reduced backup costs, and flexibility to accommodate different vehicle materials and production levels, ensuring consistent coating quality even with module failures.

Implementation Method 1

electro-deposition process... electro-deposition system... electroplating a vehicle body

Methodology Applied
Scientific EffectElectro-deposition: Electrodeposition

Data Source

PatentUS8313627B2Drag through electro-deposition system
Publication Date: 2012.11.20 GM GLOBAL TECHNOLOGY OPERATIONS LLC
  • US8313627B2 patent drawing
  • US8313627B2 patent drawing
  • US8313627B2 patent drawing

AI summary

A drag through electro-deposition system and a method of performing a drag through electro-deposition process on a vehicle body is disclosed. The system may include pairs of anodes, with each pair having a corresponding anode pair power supply. As a vehicle body is carried through the electro-deposition tank, the electric power to each pair is individually adjusted relative to the vehicle body position in the tank.