Reusable Battery Pressure Relief Vent With Directed Gas Discharge
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Solution Overview
Problem
Existing pressure relief structures in batteries are not reusable and result in high use costs, as they can only provide pressure relief once before needing replacement, and the discharge of gas can affect the operation of nearby devices due to directional limitations.
Innovation Solution
An oriented pressure relief structure with a main body, cover, and pressure relief assembly that automatically switches between a pressure relief position and a sealing position based on internal battery pressure, allowing for the reuse of the structure and controlled discharge of gas through a rotating mechanism with an elastic member for sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure relief structure is provided in the battery to discharge gas when internal pressure rises sharply, then battery safety is improved, but the pressure relief structure cannot be reused after one pressure relief event, resulting in high use costs
Solution Approach 1:
The pressure relief structure employs a dynamic cover that can rotate between a first position (blocking the discharge channel) and a second position (opening the discharge channel). This dynamic mechanism allows the structure to automatically switch between sealed and pressure relief states, enabling multiple reuse cycles while maintaining battery safety.
Solution Approach 2:
The pressure relief structure is designed to automatically respond to internal pressure changes without external intervention. When internal pressure exceeds external pressure, the cover rotates to the second position to discharge gas; when pressures equalize, the cover returns to the first position. This self-service mechanism eliminates the need for manual replacement and enables continuous reuse.
2Reliability
If gas is discharged through the pressure relief structure to relieve internal battery pressure, then battery safety is improved, but the discharged gas may affect the operation of nearby devices due to directional limitations
Solution Approach 1:
The pressure relief structure incorporates an asymmetric baffle that creates a specific discharge direction for the gas. The baffle is positioned and shaped to redirect the gas flow away from nearby devices, transforming the originally omnidirectional or harmful gas discharge into a controlled, directional flow that minimizes impact on surrounding components.
3Speed
If the cover rotates rapidly around the rotating shaft to switch between pressure relief position and sealing position, then the response speed of pressure relief is improved, but the structural complexity increases
Solution Approach 1:
The pressure relief assembly integrates multiple functions into a single rotating cover mechanism. The cover simultaneously performs sealing, pressure relief, and directional control functions by rotating around the rotating shaft. This merging of functions reduces the need for separate components and simplifies the overall structure while maintaining rapid response capability.
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 solution enables automatic and reusable pressure relief, improving battery safety and reducing costs by allowing the pressure relief structure to reopen after discharge, while directing gas discharge to prevent interference with nearby devices.
Implementation Method 1
the elastic member is configured to store elastic energy and is located on the other side of the rotating shaft facing away from the pressure relief channel in the radial direction of the rotating shaft and is configured to provide a restoring force for restoring the cover from the pressure relief position to the sealing position
Data Source
AI summary
This application relates to an oriented pressure relief structure, a battery box, a battery, and an electric apparatus. A pressure relief assembly can control, based on a relationship between an internal pressure of the battery and a preset pressure, a cover to switch between a pressure relief position and a sealing position to implement opening and closing of a pressure relief channel, thereby implementing reuse of the oriented pressure relief structure.