Battery Pack Dual Pressure Equalization Device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Battery packs face challenges in maintaining internal and external pressure equality, particularly in scenarios where internal pressure variations exceed reference levels, leading to potential damage and safety issues due to uncontrolled gas release.
Innovation Solution
A battery pack design incorporating an ambient pressure equalization device (APED) and an extreme pressure equalization device (EPED) that uses a dual-pressure equalization system, where a first pressure equalization member maintains pressure equality for small internal pressure variations and a second member rapidly releases excess pressure and gases when internal pressure exceeds a reference level, ensuring airtightness and preventing foreign material penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single pressure equalization device is used, then the device complexity is reduced, but the ability to handle both ambient and extreme pressure variations is insufficient
Solution Approach 1:
The pressure equalization device is divided into two distinct functional members: a first pressure equalization member for ambient pressure variations and a second pressure equalization member for extreme pressure variations. Each member is designed with specific structural characteristics suited to its function, allowing the system to handle different pressure scenarios effectively without requiring a single complex device to do everything.
Solution Approach 2:
The dual-pressure equalization device combines multiple functions into a single integrated assembly. The first and second pressure equalization members work together to provide both ambient pressure equalization and extreme pressure relief capabilities, making the overall device versatile enough to handle a wide range of pressure conditions that would otherwise require separate devices.
2Reliability
If the throughhole remains closed to maintain airtightness, then foreign material penetration is prevented, but internal pressure cannot be released when exceeding safe limits
Solution Approach 1:
The pressure equalization members are designed to dynamically respond to internal pressure conditions. The first pressure equalization member remains closed under normal conditions to maintain airtightness, but the second pressure equalization member is designed to open automatically when extreme pressure is detected, allowing the system to transition from a closed state to an open state based on real-time pressure conditions.
Solution Approach 2:
The pressure equalization members act as intermediary components between the sealed battery pack interior and the external environment. They provide a controlled interface that maintains sealing under normal conditions while enabling safe pressure release when necessary, mediating between the conflicting requirements of airtightness and pressure relief.
3Ease of operation
If pressure equalization is achieved through a simple membrane, then the device complexity is reduced, but the control over pressure release timing and rate is insufficient
Solution Approach 1:
Different regions of the pressure equalization device have different structural properties tailored to their specific functions. The first pressure equalization member has structural characteristics optimized for maintaining closure under ambient pressure, while the second member has characteristics optimized for opening under extreme pressure. This local differentiation of structural quality enables precise control over pressure release timing and rate without requiring complex overall device 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 dual-pressure equalization system effectively maintains internal and external pressure balance, preventing damage and ensuring safety by allowing controlled gas release when internal pressure exceeds safe limits, thus enhancing the reliability and longevity of battery packs.
Implementation Method 1
an elastic member positioned inside the inner body
Implementation Method 2
The first pressure equalization member may be made of an air permeable material
Data Source
AI summary
A battery pack includes a housing accommodating a battery cell and having a throughhole; and a pressure equalization device coupled to the throughhole and equalizing internal and external pressures of the housing, wherein the pressure equalization device includes a first pressure equalization member configured to equalize the internal and external pressures of the housing when a variation in the internal pressure of the housing is smaller than a reference pressure variation; and a second pressure equalization member configured to equalize the internal and external pressures of the housing when the variation in the internal pressure of the housing is greater than the reference pressure variation.