Battery Cell Pressure Relief Vent With Guided Flip-Open Rupture
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Solution Overview
Problem
Current batteries suffer from poor reliability, particularly in terms of pressure relief mechanisms, which can lead to risks of explosion and fire.
Innovation Solution
The battery cell design incorporates a pressure relief component with a first weak portion that cracks to allow fluid medium outflow, and a second weak portion that guides the pressure relief region to flip open, enhancing the speed and reliability of pressure relief.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure relief component with a single weak portion is used, then the structure is simple, but the pressure relief speed is slow and reliability is poor
Solution Approach 1:
The pressure relief component is segmented into two distinct weak portions: a first weak portion that cracks under pressure to initiate pressure relief, and a second weak portion that flips open to fully open the pressure relief region. This segmentation allows each portion to perform its specific function optimally, improving overall reliability while maintaining reasonable structural complexity
Solution Approach 2:
The first weak portion is designed to crack before the second weak portion flips open. This preliminary action of cracking creates an initial opening that allows pressure to act on the second weak portion, enabling it to flip open more effectively and rapidly complete the pressure relief process
2Object-affected harmful factors
If the pressure relief region opens slowly, then the structural integrity is maintained, but the risk of explosion and fire increases
Solution Approach 1:
The pressure relief component transitions from a static closed state to a dynamic opening process. The first weak portion cracks dynamically under pressure, and the second weak portion flips open dynamically, creating a rapid two-stage opening sequence that accelerates pressure relief speed and reduces harmful effects
Solution Approach 2:
By dividing the opening process into two segments (cracking phase and flipping open phase), the system achieves faster overall pressure relief. The first weak portion cracks quickly to break the seal, then the second weak portion flips open to fully open the pressure relief region, creating a rapid two-stage opening sequence
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 improves the reliability of the battery by ensuring rapid pressure relief, reducing the risk of explosion and fire, while maintaining structural integrity.
Implementation Method 1
the pressure relief component is configured to be capable of cracking along at least a part of the first weak portion during pressure relief of the battery cell
Implementation Method 2
the second weak portion is configured to guide at least a part of the predetermined pressure relief region to flip over to open the at least a part of the predetermined pressure relief region
Data Source
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AI summary
The present application relates to the field of batteries, and provides a battery cell, a battery, and an electrical device. The battery cell comprises a housing and a pressure relief component, and the housing is provided with a first wall. The pressure relief component is provided on the first wall, the pressure relief component comprises a first weakened portion, the first weakened portion defines a predetermined pressure relief area, and the pressure relief component is configured to be capable of cracking along at least part of the first weakened portion when relieving pressure from the battery cell. The pressure relief component further comprises a second weakened portion, and the second weakened portion is configured to guide at least part of the predetermined pressure relief area to invert so as to open at least part of the predetermined pressure relief area. The battery cell is provided with the first weakened portion and the second weakened portion, and when pressure is relieved from the battery cell, the first weakened portion cracks, so that a fluid medium in the battery cell flows out to relieve pressure. By means of providing the second weakened portion, the predetermined pressure relief area can be inverted and opened under the guidance of the second weakened portion, which is beneficial for increasing the opening speed of the predetermined pressure relief area to achieve rapid pressure relief, and is beneficial for improving the reliability of the battery cell.