Battery Box Pressure Relief Mechanism With Corrosion Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lithium-ion batteries lack effective pressure relief mechanisms that prevent thermal runaway and explosion while minimizing corrosion and installation complexity, particularly when installed on battery boxes with electrolytic solutions and complex geometries.
Innovation Solution
A pressure relief mechanism for battery boxes featuring a connecting mechanism with a boss, a pressure relief sheet protected by a first protective sheet, a compression ring, and a pressing structure, designed to simplify installation and reduce corrosion by positioning the protective sheet inside the battery box.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressure relief sheet is directly exposed to the electrolytic solution to release internal pressure, then the pressure relief function is achieved, but the pressure relief sheet suffers from corrosion by the electrolytic solution
Solution Approach 1:
The patent introduces a protective sheet as an intermediary component between the pressure relief sheet and the electrolytic solution. This protective sheet allows the pressure relief function to be achieved while preventing direct contact between the pressure relief sheet and the corrosive electrolytic solution, thereby resolving the contradiction between reliability and corrosion resistance.
2Object-affected harmful factors
If a protective sheet is added to shield the pressure relief sheet, then corrosion is reduced, but the device complexity increases
Solution Approach 1:
The patent uses a thin protective sheet to shield the pressure relief sheet. This thin film approach provides effective corrosion protection while minimizing the increase in device complexity, as the protective sheet is thin and does not significantly add to the overall structure.
3Reliability
If a complex pressing structure is used to install the pressure relief mechanism, then the sealing performance is improved, but the ease of operation deteriorates
Solution Approach 1:
The patent combines the pressing structure with the connecting mechanism, integrating multiple functions into a single component. This merging reduces the number of separate parts and simplifies the installation process while maintaining adequate sealing performance through the integrated design.
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 mechanism effectively releases internal pressure, reduces corrosion, and simplifies installation by using a protective sheet to shield the pressure relief sheet from electrolytic solution, enhancing safety and ease of assembly.
Implementation Method 1
a compression ring configured to press the first protective sheet and arranged on a side of the first protective sheet away from the first boss
Implementation Method 2
a pressure relief sheet configured to be actuated to release an internal pressure of the battery box when the internal pressure reaches a threshold
Data Source
AI summary
The present application discloses a pressure relief mechanism, a battery cell and a battery. The pressure relief mechanism includes: a connecting mechanism including an aperture and a first boss, the first boss being connected to an inner wall of the aperture and extending toward an axis of the aperture; a pressure relief sheet for being actuated to release an internal pressure of the battery box when the internal pressure reaches a threshold and being arranged on a side of the first boss; a first protective sheet used to protect the pressure relief sheet and arranged on the other side of the first boss away from the pressure relief sheet; a compression ring arranged on a side of the first protective sheet away from the first boss; and a pressing structure connected to the connecting mechanism and being capable of being pressed toward the axis of the aperture.