Battery Vent Cap Segmented Design for Tool-Free Maintenance
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Solution Overview
Problem
Existing battery vent cap designs, particularly push-in caps, are difficult and hazardous to remove for routine maintenance due to the need for tools that can cause damage and potential explosions.
Innovation Solution
A battery vent cap design featuring radially outwardly extending tabs that allow for installation without rotational movement and removal with less than 180 degrees of rotation, facilitating easy installation and removal while maintaining a secure seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If push-in caps are tightly fitted into the vent port to improve sealing and prevent dislodging, then the seal reliability is improved, but the ease of removal deteriorates requiring tools that can damage the battery cover and cause sparks
Solution Approach 1:
The vent cap is segmented into a cap body and a separate retention ring that remains in the vent port. The retention ring has inwardly extending tabs that engage with outwardly extending tabs on the cap body, creating a mechanical interlock that provides secure retention during normal operation but allows easy release when needed.
Solution Approach 2:
The retention system transitions from a static tight fit to a dynamic system where the retention ring can be easily removed from the vent port. The inwardly extending tabs on the retention ring are designed to disengage from the outwardly extending tabs on the cap body with simple manual manipulation, enabling easy removal without tools.
2Stability of the object's composition
If push-in caps are tightly fitted to prevent dislodging during battery flexing, then the stability is improved, but the ease of repair deteriorates due to potential damage to the battery cover and caps
Solution Approach 1:
The vent cap assembly is divided into three components: the cap body, the retention ring, and the sealing element. The retention ring stays in the vent port providing stable retention, while the cap body with outwardly extending tabs can be easily removed and reinstalled, facilitating maintenance without damaging the battery cover.
Solution Approach 2:
The retention ring acts as an intermediary component between the vent port and the cap body. It provides the stable mechanical interlock needed for reliable retention while allowing the cap body to be easily removed and reinstalled, thus facilitating maintenance without requiring tools that could damage the battery cover.
3Reliability
If push-in caps are tightly fitted to maintain seal over wide temperature and vibration ranges, then the reliability is improved, but the ease of operation deteriorates due to hazardous removal requiring metal tools
Solution Approach 1:
The retention ring is designed to be manually manipulated and removed from the vent port without requiring metal tools. The inwardly extending tabs can be easily disengaged from the outwardly extending tabs on the cap body through simple manual pressure, allowing safe removal without creating sparks or damaging the battery cover.
Data Source
AI summary
A battery vent cap includes a cylindrical body having an upper portion and a lower portion. A pair of diametrically opposed, radially outwardly extending bayonet tabs is formed on the lower portion. The bayonet tabs permit an installation of the vent cap into a vent port of a battery cover without rotational movement thereof and a removal of the vent cap from the vent port with less than about 180 degrees rotational movement.