Battery End Cover Protective Patch for Breather Valve
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Solution Overview
Problem
Foreign substances such as welding slag and electrolyte spray contaminate the breather valve in battery cell assemblies, disrupting the gas permeation effect and compromising pressure balance within the battery cell.
Innovation Solution
An end cover assembly with a protective patch covering the gas-permeable membrane of the breather valve, along with a second channel for gas communication, is introduced to prevent contamination and maintain effective gas permeation, ensuring balanced internal and external pressure within the battery cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the breather valve is exposed during assembly, then the assembly process is simple and fast, but foreign substances contaminate the gas-permeable membrane affecting gas permeation
Solution Approach 1:
A protective patch is pre-installed on the end cover at the position where the gas-permeable membrane will be located. This preliminary protective measure ensures that when the breather valve is subsequently installed and exposed during assembly, the gas-permeable membrane remains protected from foreign substances such as welding slag and electrolyte spray, maintaining both assembly efficiency and gas permeation reliability
Solution Approach 2:
The protective patch serves as an intermediary element between the external environment and the gas-permeable membrane. It temporarily occupies the space where the membrane will be positioned and provides a barrier against contaminants during the assembly process, allowing the membrane to function properly once the protective patch is removed
2Ease of operation
If the gas-permeable membrane is exposed to allow gas passage, then gas permeation function is achieved, but the membrane is vulnerable to contamination from welding slag and electrolyte spray
Solution Approach 1:
The protective patch is installed in advance at the location where the gas-permeable membrane will be positioned. This preliminary protection allows the membrane to be exposed and functional for gas permeation while simultaneously shielding it from harmful factors such as welding slag and electrolyte spray during subsequent assembly operations
Solution Approach 2:
The protective patch is designed as a temporary, disposable protective element that is easily installed and removed. It provides short-term protection during the critical assembly phase and is discarded after serving its purpose, allowing the gas-permeable membrane to transition from protected state to functional exposed state
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 protective patch effectively shields the breather valve from contaminants, enhancing the gas permeation effect and protecting internal components by maintaining proper pressure balance within the battery cell, thus improving the overall performance and reliability of the battery.
Implementation Method 1
gas inside and outside the battery cell passes through a gas-permeable membrane via a gas channel of the breather valve for gas compensation
Data Source
AI summary
An end cover assembly, a battery, and an electric device are provided. The end cover assembly is applied to a battery and includes an end cover, a breather valve, and a protective patch. The end cover has a first side facing inside of the battery and a second side opposite the first side and includes a first channel in communication with the first side and the second side. The breather valve includes a gas-permeable membrane in gas communication with the first channel. The gas-permeable membrane includes a gas-permeable portion opened towards the second side of the end cover. The protective patch is provided on the second side of the end cover and covers the gas-permeable portion. The battery includes the end cover assembly. The electric device includes the battery.