Conductive Deposit Test Apparatus for Electric Vehicle Fluid Analysis
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Solution Overview
Problem
Current methods inadequately assess the corrosion potential and conductive deposit formation of lubricating and heat transfer fluids in electrified environments, particularly in electric vehicles, where these fluids can cause leakage currents and short circuits due to corrosion of copper components.
Innovation Solution
A conductive deposit test apparatus that includes a conductive substrate mount with a patterned conductive substrate, a test cell housing, and a source of electric power, capable of simulating conditions to evaluate the formation of conductive deposits when exposed to test fluids at elevated temperatures, while restricting fluid movement and monitoring data for analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional corrosion testing methods are used, then general corrosion resistance can be assessed, but conductive deposit formation and leakage current risks cannot be detected
Solution Approach 1:
The patent combines corrosion testing with electrical conductivity measurement in a single integrated apparatus. The test cell simultaneously exposes conductive substrates to test fluids while applying electrical voltage and measuring current, merging two separate testing functions into one system to detect both corrosion and conductive deposit formation.
Solution Approach 2:
The test apparatus is designed to perform multiple functions: it can test both corrosion resistance and conductive deposit formation using the same basic setup. The conductive substrates serve dual purposes as both corrosion targets and electrical measurement elements, allowing one apparatus to evaluate multiple failure modes.
2Reliability
If copper substrates are exposed to test fluids without voltage application, then corrosion can occur naturally, but conductive deposit formation under electrical stress cannot be evaluated
Solution Approach 1:
The patent applies electrical voltage as an additional parameter to the corrosion testing environment. By superimposing an electrical field on the chemical corrosion process, the test simulates real-world conditions where copper components experience both chemical degradation and electrical stress, revealing conductive deposit formation that wouldn't occur under natural corrosion alone.
Solution Approach 2:
The applied voltage serves to accelerate and reveal potential failure modes before they occur in actual service. By pre-applying electrical stress during testing, the apparatus identifies fluids that may lead to leakage currents or short circuits, allowing corrective fluid formulation changes before product failure.
3Measurement precision
If test fluids are allowed to move freely around conductive substrates, then realistic service conditions are simulated, but deposit formation is inconsistent and hard to measure
Solution Approach 1:
The patent creates a localized test environment where fluid movement is restricted to specific areas around the conductive substrates. The test cell design confines fluids to immediate proximity of the substrates, creating controlled local conditions that promote consistent deposit formation while still representing service environments where fluids contact electrical components.
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 apparatus provides a direct measurement of conductive deposit formation on copper conductors exposed to lubricating or thermal fluids, characterizing both corrosion potential and the tendency of corrosion products to form conductive deposits, thereby identifying potential failures in electric vehicles and other electrified systems.
Implementation Method 1
a source of electric power capable of passing through the conductive substrate(s)
Implementation Method 2
a source for heating and/or cooling the test fluid held in the test cell housing during testing
Data Source
AI summary
Conductive deposit test apparatus for testing a fluid includes conductive substrate deposit unit having a conductive substrate mount, and mounted on said mount, conductive substrate(s) narrowly spaced apart in a pattern of a plurality of adjacent members forming a conductive deposit test fluid deposit receiver; a test cell, which includes a test cell housing together with said conductive substrate(s) mounted on said mount, and which is configured to hold the test fluid; and a source of electric power for heating the apparatus, passing electricity through said conductive substrate(s), and so forth. A non-electrically conductive covering element may constrain movement of the fluid in a narrow gap in proximity to the conductive substrate. Data monitoring and/or analyzing component(s) and/or equipment can be provided. Method for testing a test fluid includes steps of providing the test apparatus; providing power, and operating the apparatus under elevated temperature; and monitoring/analyzing generated data.