Conductive Foam Packaging for Electrochemical Gas Sensors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing packaging methods for electrochemical gas sensors result in significant start-up or stabilization delays due to electrode potential drift, leading to increased manufacturing cycle times and costs, as they require manual application and removal of shorting springs or materials that are not selectively effective or durable.
Innovation Solution
Integration of a conductive, elastic foam into the packaging that selectively shorts only the necessary sensor contacts, maintaining them at the required potentials and eliminating the need for manual spring application and removal, while providing a low resistance path to prevent startup delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If manual shorting springs are applied to sensor contacts, then electrode potential stability is improved, but manufacturing labor time and complexity increase
Solution Approach 1:
The conductive foam is pre-installed in the packaging structure before the sensor is placed in it. When the sensor is inserted, the foam automatically makes contact with the sensor contacts and establishes the shorting connection, eliminating the need for manual spring application after sensor assembly.
Solution Approach 2:
The conductive foam automatically establishes and maintains the shorting connection between sensor contacts through its elastic properties and electrical conductivity. The foam self-adjusts to maintain contact pressure and electrical connection without requiring manual intervention or additional components.
2Stability of the object's composition
If manual shorting springs are used, then electrode potential stability is improved, but manufacturing productivity decreases
Solution Approach 1:
The shorting function is built into the packaging structure in advance through the pre-installed conductive foam, allowing sensors to be quickly inserted without requiring separate manual spring application steps, thereby increasing manufacturing throughput.
Solution Approach 2:
The conductive foam automatically performs the shorting function upon sensor insertion, eliminating the need for manual labor to apply and later remove springs, significantly reducing manufacturing cycle time and increasing productivity.
3Ease of manufacture
If conductive foam is integrated into packaging, then labor costs are reduced, but packaging complexity increases
Solution Approach 1:
The shorting function is merged with the packaging structure by integrating the conductive foam into the packaging design. This combines the protective packaging function with the electrical shorting function in a single integrated solution, eliminating separate shorting components.
Solution Approach 2:
The conductive foam provides uniform electrical contact across all sensor contacts through its compliant nature, ensuring consistent shorting performance without requiring precise alignment or multiple discrete contact points, simplifying the overall design.
4Reliability
If selective shorting is implemented, then electrode performance is maintained, but risk of undesirable potential increases
Solution Approach 1:
The conductive foam is strategically positioned to make contact only with the specific sensor contacts that require shorting. The foam's placement and shape are designed to provide selective electrical connection, ensuring that only the intended electrodes are shorted while others remain unaffected.
Solution Approach 2:
The packaging structure is designed with distinct contact zones that segment the shorting function, allowing different regions of the conductive foam to contact different sensor contacts. This segmentation ensures that only the required electrodes are connected, preventing unintended shorting between unrelated contacts.
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 reduces labor costs and manufacturing time by maintaining sensors in a ready state without manual intervention, ensuring consistent and efficient electrode potential management during storage and integration, thereby minimizing startup delays and improving productivity.
Implementation Method 1
a first conductive, elastic foam member (18a) is provided in the respective first cavity (14b) of the plurality of cavities (14). The conductive foam members (18a) are shaped and positioned to interact with selected electrodes, or pins, of sensors (20, 20a) to be carried by the packaging (10) to provide an electrical short between those pins
Implementation Method 2
The conductive foam members (18a) are shaped and positioned to interact with selected electrodes, or pins, of sensors (20, 20a) to be carried by the packaging (10)
Data Source
AI summary
Packaging for electronic components includes provisions to short selected electrodes of the components together. A plastic base portion with a plurality of component receiving cavities carries a flexible, carbonized shorting element which extends between cavities. The cavities include a recess which is adjacent to the shorting element. Components can be inserted into respective cavities, and some of the electrodes will contact the shorting element. Other electrodes will extend into the recess and not be shorted.