Electrode Post Frangible Venting for Battery Pressure Relief
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Solution Overview
Problem
Existing electrochemical devices face safety hazards such as explosions and fires due to pressure buildup, and existing pressure relief mechanisms often compromise the structural integrity of the shell when a frangible portion is formed on it.
Innovation Solution
A frangible portion is created on the electrode post within the electrochemical device, which breaks to relieve pressure when internal pressure reaches a threshold, avoiding structural impairment of the shell and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a frangible portion is provided on the shell to relieve pressure, then pressure relief function is improved, but structural strength and structural integrity of the shell deteriorate
Solution Approach 1:
The frangible portion is extracted from the shell and relocated to the electrode post. This allows the pressure relief function to be separated from the shell structure, enabling the shell to maintain its structural integrity while the electrode post provides the pressure relief capability through its frangible portion.
Solution Approach 2:
The electrode post serves as an intermediary component that hosts the frangible portion. Instead of modifying the shell directly, the invention uses the electrode post as a mediator to implement pressure relief, thereby protecting the shell's structural strength while achieving the same safety function.
2Reliability
If a frangible portion is provided on the shell, then pressure relief is achieved, but the manufacturing process becomes more complex
Solution Approach 1:
The frangible portion is extracted from the shell and placed on the electrode post, which simplifies the manufacturing process. The electrode post can be formed with the frangible portion as an integrated feature during its own manufacturing, avoiding the need for additional processing steps on the shell.
Solution Approach 2:
The frangible portion is merged with the electrode post structure, forming an integrated component. This combination allows the frangible feature to be created during the electrode post manufacturing process itself, reducing overall manufacturing complexity compared to modifying the shell separately.
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
This solution effectively reduces the risk of explosions and fires by allowing pressure relief without compromising the shell's structural integrity, enhancing the safety performance of the electrochemical device.
Implementation Method 1
when a pressure in the shell reaches a threshold, the frangible portion is configured to be burst open... to relieve the pressure
Data Source
Figure 1
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AI summary
An electrochemical device (100) includes a shell (30), an electrode post (10), and an electrode assembly (20). A through-hole (321) is provided on the shell (30). The electrode post (10) is disposed on the shell (30) and at least partially accommodated in the through-hole (321). The electrode post (10) is electrically connected to the electrode assembly (20). A frangible portion (11) is provided at a position corresponding to the through-hole (321) on the electrode post (10). The frangible portion (11) is configured to be burst open when a pressure in the shell (30) reaches a threshold, so as to implement communication between inside and outside of the shell (30) to relieve the pressure. Provided on the electrode post (10), the frangible portion (11) can be broken when the pressure in the electrochemical device (100) reaches the threshold.