Multi-Vent Rechargeable Battery Cap Plate for Rapid Gas Discharge
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Solution Overview
Problem
Conventional rechargeable batteries with a single vent unit struggle to quickly discharge generated gas, posing safety risks as they are unable to efficiently manage increased pressure, particularly in larger batteries.
Innovation Solution
A rechargeable battery design featuring multiple vent plates linked to an elevating member that simultaneously opens when internal pressure reaches a set value, allowing rapid gas discharge through multiple vent units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single vent unit is provided in the cap plate, then the structure is simple, but the gas discharge speed is slow and safety is compromised
Solution Approach 1:
The single vent unit is segmented into multiple vent units (first vent unit and second vent unit), each with its own vent plate. This segmentation allows simultaneous opening of multiple vents when pressure reaches the set value, significantly increasing gas discharge speed and improving safety without requiring a completely new structural approach
2Productivity
If multiple vent units are provided to increase gas discharge speed, then safety is improved, but the structure becomes complex
Solution Approach 1:
Multiple vent plates are merged with a common elevating member through connection members. When the elevating member rises due to internal pressure, it simultaneously pulls all connected vent plates to open multiple vent units at once. This merging approach achieves rapid gas discharge through multiple vents while maintaining structural simplicity through the shared elevating mechanism
3Ease of operation
If vent plates are made thinner to break easily under pressure, then gas discharge is enabled, but control over opening timing is reduced
Solution Approach 1:
The elevating member acts as an intermediary between the internal pressure and the vent plates. Instead of relying on thin vent plates to break at unpredictable pressures, the elevating member provides a controlled mechanical response that activates all vent plates simultaneously at a predetermined pressure threshold, ensuring both automatic operation and precise control
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 design ensures quick gas discharge, preventing electrode assembly deterioration and explosion by effectively managing pressure, thereby enhancing safety.
Implementation Method 1
when pressure inside the case increases because of overcharging, the vent plate is broken in advance to other portions to discharge a gas
Data Source
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AI summary
A rechargeable battery according to an embodiment of the present invention includes: an electrode assembly; a case for receiving the electrode assembly; a cap plate combined to an opening of the case to close and seal an inside of the case and including a plurality of vent units; an elevation member penetrated and installed in the cap plate and moving by an internal pressure of the case; and a plurality of vent plates for closing and sealing the respective vent units, wherein the vent plate is connected to the elevation member through a connection member and links to the elevation member.