Explosion-Proof Sheet Mounting With Offset Battery Vent Wall
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Solution Overview
Problem
Existing explosion-proof sheets require ultrasonic welding on the top cover, affecting their performance and resulting in inefficient gas exhaust paths.
Innovation Solution
The explosion-proof sheet is mounted using a retaining ring that is connected to the battery housing's mounting wall, offset from the top opening, eliminating the need for welding on the top cover and ensuring efficient gas release through a connected explosion hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If ultrasonic welding is used to mount the lower plastic member on the top cover, then the mounting is secure, but the explosion-proof sheet performance is affected
Solution Approach 1:
The patent divides the mounting structure into separate components: the explosion-proof sheet is mounted on an inner ring, which is then mounted on the mounting wall. This segmentation isolates the explosion-proof sheet from the ultrasonic welding process, preventing welding heat from affecting the sheet while maintaining secure mounting through the ring structure.
Solution Approach 2:
The inner ring acts as an intermediary component between the explosion-proof sheet and the mounting wall. It provides a mounting surface for the explosion-proof sheet and a separate interface for ultrasonic welding to the mounting wall, thereby protecting the explosion-proof sheet from direct exposure to welding heat and ultrasonic vibrations.
2Device complexity
If the explosion-proof sheet is mounted on the top cover, then the structure is simple, but the exhaust path is long and exhaust efficiency is low
Solution Approach 1:
The patent changes the spatial arrangement by offsetting the mounting wall from the top opening and positioning the explosion hole on the mounting wall rather than directly on the top cover. This dimensional repositioning creates a more direct exhaust path from the battery housing through the explosion hole, reducing the exhaust path length while maintaining structural integrity.
3Productivity
If the mounting wall is offset from the top opening, then the exhaust path is shortened and exhaust efficiency is improved, but the mounting structure becomes more complex
Solution Approach 1:
The inner ring serves multiple functions: it provides a mounting surface for the explosion-proof sheet, creates a seal between the sheet and the mounting wall, and facilitates the offset mounting structure. By consolidating these functions into a single component, the patent reduces overall structural complexity while achieving the exhaust efficiency improvements from the offset 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
This method simplifies the welding process, reduces performance impact, and enhances gas exhaust efficiency by directly releasing pressure through an offset explosion hole, improving safety and space utilization.
Implementation Method 1
When the pressure in the battery exceeds a set value, the explosion-proof sheet will break to release abnormal gas inside the battery
Implementation Method 2
mounting the retaining ring on the mounting wall, so that the explosion-proof sheet closes the explosion hole
Data Source
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AI summary
The present application relates to the technical field of explosion-proof sheets, and particularly, to a method for mounting an explosion-proof sheet. The method comprises the following steps: 1) providing an explosion-proof sheet and a fixing ring that defines an enclosed area; connecting the explosion-proof sheet to the fixing ring to seal the enclosed area; and 2) providing a battery housing having an accommodating cavity therein for disposing a battery cell, wherein the top of the accommodating cavity of the battery housing is provided with a top opening for mounting a top cover sheet; the battery housing is provided with a mounting wall arranged in misalignment with the top opening; the mounting wall is provided with a blast hole in communication with the accommodating cavity; the fixing ring is mounted on the mounting wall, and the explosion-proof sheet seals the blast hole. According to the present application, the explosion-proof sheet is first connected to the fixing ring, and then the fixing ring is mounted in the blast hole of the mounting wall of the battery housing. The mounting wall is in misalignment with the top opening of the battery housing and is not mounted on the top cover sheet, which reduces the welding procedures on the top cover sheet and reduces the impact on the performance of the explosion-proof sheet during the welding of lower plastic pieces.