Battery Vent Cap Fluid Flow Path Minimizing Float Impingement
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Solution Overview
Problem
Prior art battery vent caps with float mechanisms and valves restrict fluid flow into battery cells, increasing filling time and risking valve malfunction due to fluid impingement, leading to undesired opening and closing of the fluid fill path.
Innovation Solution
A vent cap design with a float mechanism and valve that minimizes fluid impingement on the float, allowing for efficient fluid flow into battery cells by isolating the fluid path from the float, ensuring consistent operation and preventing overfilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a valve is placed within the fluid fill path to control fluid flow, then the fluid level can be controlled, but the valve restricts the flow of water increasing filling time
Solution Approach 1:
The fluid fill path is segmented into multiple pathways: a first fluid fill path for initial filling and a second fluid fill path for top-off filling. The valve is positioned only in the second path, allowing unrestricted flow through the first path while maintaining control through the second path.
Solution Approach 2:
A diverter mechanism acts as an intermediary that directs fluid flow between the first and second fluid fill paths based on fluid level. When the float is in the down position, the diverter channels fluid through the first path; when the float rises, the diverter switches to channel fluid through the second path with valve control.
2Productivity
If fluid flows through the fluid fill path to fill the battery cell, then the fluid level increases, but fluid is discharged onto the float mechanism causing malfunction
Solution Approach 1:
The float mechanism is spatially separated from the fluid discharge path. The float operates within a float chamber that is distinct from the fluid fill paths, preventing direct contact between incoming fluid and the float mechanism.
Solution Approach 2:
The diverter mechanism serves as an intermediary that directs fluid away from the float mechanism. The diverter is positioned to channel fluid through the first or second fill paths based on float position, ensuring fluid does not discharge onto the float while still allowing the float to accurately sense fluid level.
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 vent cap design reduces filling time and prevents valve malfunctions, ensuring reliable and efficient fluid addition to battery cells while maintaining the desired fluid level.
Implementation Method 1
a float coupled to the valve and positioned to float adjacent a surface of a fluid disposed within the battery cell
Data Source
AI summary
A vent cap includes a main body configured to be received within an opening in a cover of a battery cell, the main body including a fluid flow path formed therethrough to facilitate a flow of a fluid to be added to the battery cell, a valve moveably disposed within the flow path to selectively open and close the fluid flow path, and a float coupled to the valve and positioned to float adjacent a surface of a fluid disposed within the battery cell, the float causing the valve to open the fluid flow path at a pre-determined fluid level within the battery cell to permit the fluid to be added to the battery cell to flow through the fluid flow path, wherein the fluid flow path is configured to minimize an impinging on the float by the fluid to be added to the battery cell.