Wearable Electrode Pad Collection Well for Corrosion Control
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Solution Overview
Problem
Electronic wearable devices face corrosion issues during recharging due to salt accumulation on electrode pads when exposed to electrical current, which can inhibit the recharging process.
Innovation Solution
Incorporating a collection well adjacent to the electrode pad to collect and contain sweat and fluids, preventing salt accumulation on the electrode pads by positioning the collection well at a lower elevation than the electrode pad, and using an insulated area to prevent fluid contact with the electrode pad.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the electrode pad is exposed to electrical current during recharging, then the recharging process can be performed, but salt accumulation occurs on the electrode pad causing corrosion
Solution Approach 1:
The patent extracts the harmful salt accumulation from the electrode pad surface by introducing a collection well structure. The collection well is positioned to receive and contain sweat and fluids that would otherwise remain on the electrode pad, allowing salt to be separated from the active electrode surface. This extraction principle resolves the contradiction by removing the corrosive element while preserving the recharging function.
Solution Approach 2:
The collection well acts as an intermediary structure between the electrode pad and the external environment. It mediates the interaction by providing a designated space for fluid collection, preventing direct contact between salt-containing sweat and the electrode pad surface. This intermediary structure allows recharging to proceed while protecting the electrode from corrosion.
2Ease of manufacture
If sweat and fluids are allowed to remain on the electrode pad, then natural evaporation can occur, but salt accumulates and accelerates corrosion
Solution Approach 1:
The patent introduces a vertical dimension by creating a collection well that extends downward from the electrode pad surface. This dimensional change allows fluids to be directed into a lower elevation space, separating the liquid collection function from the electrode pad's primary horizontal surface. This resolves the contradiction by providing corrosion protection through structural geometry rather than complex chemical or functional modifications.
3Reliability
If the collection well is positioned at the same elevation as the electrode pad, then fluid collection is possible, but fluid may still contact the electrode pad during recharging
Solution Approach 1:
The patent applies the principle of equipotentiality by positioning the collection well at a lower elevation than the electrode pad surface. This elevation difference creates a gravitational potential gradient that naturally directs fluids into the collection well and prevents them from flowing back onto the electrode pad. This simple elevation-based solution achieves reliable fluid isolation without requiring complex positioning mechanisms or precision controls.
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 collection well effectively reduces corrosion by evaporating water and isolating salt from the electrode pads, thereby prolonging the device's lifespan and maintaining recharging efficiency.
Implementation Method 1
positioning the collection well at a lower elevation than the electrode pad
Implementation Method 2
The water may evaporate, and the salt may remain in the collection well
Data Source
AI summary
Examples disclosed herein relate to an electronic wearable device electrode pad with a collection well. For example, the electronic wearable device may include an electrode pad used to recharge the electronic wearable device, a depression relative to the electrode pad to create a collection well, and an insulated area between the electrode pad and the collection well. The top surface of the electrode pad may be elevated relative to the bottom of the collection well when the electronic wearable device is positioned for recharging.