Battery Cell Cap Mask Structure for Venting and Potting Blockage
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Solution Overview
Problem
Existing battery cell designs face challenges in preventing potting material from flowing into openings, which can prevent the operation of current interrupt devices and venting pathways, affecting the functionality of battery cells in electric vehicles and other applications.
Innovation Solution
A mask structure with blocking structures is mounted over the openings of the battery cell cap to prevent liquid flow while allowing gas to escape, ensuring the proper functioning of current interrupt devices and maintaining the structural integrity of the battery cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cap of the battery cell is left open to allow venting, then gas can escape, but liquid potting material can flow into the opening and prevent operation of the current interrupt device
Solution Approach 1:
The mask structure introduces localized differentiation by allowing gas to pass through while blocking liquid potting material. The mask has different permeability properties for different substances (gas vs liquid), creating selective functionality at specific locations without affecting the overall cap design.
Solution Approach 2:
The mask acts as an intermediary component between the opening and the potting material. It mediates the interaction by selectively permitting gas flow while preventing liquid intrusion, thus protecting the current interrupt device without completely sealing the opening.
2Object-affected harmful factors
If the opening is sealed to prevent liquid flow, then potting material cannot enter, but gas venting is blocked
Solution Approach 1:
The mask utilizes porous or permeable material properties that allow gas molecules to pass through while blocking larger liquid molecules. This enables simultaneous achievement of liquid prevention and gas venting through selective permeability.
Solution Approach 2:
The mask structure creates localized quality differences by having regions or properties that selectively interact with different substances (gas vs liquid), allowing differential functionality at the same location.
3Object-affected harmful factors
If a mask structure is added to block liquid flow, then potting material is prevented from entering, but device complexity increases
Solution Approach 1:
The mask structure serves multiple functions simultaneously: it blocks liquid potting material, allows gas venting, and protects the current interrupt device. By combining these functions into a single component, the overall device complexity is minimized despite the added functionality.
Solution Approach 2:
The mask combines multiple protective and functional features into a single integrated structure, merging liquid blocking, gas venting, and device protection functions that would otherwise require separate 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
The mask structure effectively prevents potting material from entering the openings, ensuring the operational integrity of current interrupt devices and enhancing the manufacturability and reliability of battery cells, contributing to the proliferation of electric vehicles and reduction of greenhouse gas emissions.
Implementation Method 1
each of the plurality of peripheral openings may be configured to: allow a gas to flow therethrough between the opening in the cap of the battery cell and an environment external to the mask
Implementation Method 2
The at least one blocking structure may include a plurality of blocking structures configured to be mounted over a plurality of corresponding openings in the cap of the battery cell
Implementation Method 3
a compressible internal material provided under or within the cell cap
Data Source
AI summary
Aspects of the subject disclosure relate to various masking features for battery cells. Masking features for battery cells may include masks that are mounted to a cell cap of a battery cell, masking features extending from other electrical components to provide masking for the battery cells, and/or or a compressible internal material provided under or within the cell cap.