End Cover Vent Structure for Protected Battery Valve Airflow
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Solution Overview
Problem
Current energy-storage apparatuses face safety hazards due to irreversible side reactions, gas generation, and thermal runaway, which can lead to fires, especially under abnormal conditions like high temperature, short circuits, or mechanical stress.
Innovation Solution
An end cover assembly with a bracket and mounting member design that includes airflow channels and an accommodating space for an explosion-proof valve, enhancing airflow convergence and protecting the valve, thereby improving safety and lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an explosion-proof valve is installed in the end cover assembly, then safety is improved by releasing gas pressure, but the valve may be blocked by foreign matter or affected by airflow maldistribution
Solution Approach 1:
A guide structure is introduced as an intermediary component between the external environment and the explosion-proof valve. This guide structure channels airflow and prevents foreign matter from directly reaching the valve, allowing the valve to function safely while being protected from contamination and blockage.
Solution Approach 2:
The guide structure is designed to pre-channel airflow and filter foreign matter before they reach the explosion-proof valve. By performing this protective action in advance, the valve remains clean and functional, ensuring reliable safety operation when needed.
2Ease of manufacture
If the end cover assembly structure is simplified, then manufacturing cost is reduced, but airflow convergence to the explosion-proof valve is insufficient
Solution Approach 1:
The guide structure serves multiple functions simultaneously: it guides airflow convergence toward the explosion-proof valve, filters foreign matter, and integrates with the existing end cover assembly structure. This multi-functionality achieves improved airflow convergence without requiring separate complex components, maintaining manufacturing simplicity.
3Temperature
If the end cover assembly is designed with airflow channels, then thermal management is improved, but device complexity increases
Solution Approach 1:
The airflow channels are merged with the guide structure and end cover assembly components rather than being separate additions. The guide structure itself forms part of the airflow channel system, combining thermal management functionality with the protective and guiding functions in a single integrated design, thereby reducing overall structural complexity.
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 design ensures effective air convergence to the explosion-proof valve, enhancing the safety and lifespan of the energy-storage apparatus by preventing foreign matter intrusion and ensuring the valve's functionality, thus reducing the risk of thermal runaway.
Implementation Method 1
The design ensures effective air convergence to the explosion-proof valve, enhancing the safety and lifespan of the energy-storage apparatus
Data Source
AI summary
An end cover assembly, an energy-storage apparatus, and an electricity-consumption device are provided. The end cover assembly includes a bracket, a mounting member, and a cover plate. The bracket includes a bottom plate and a side baffle. The bottom plate is connected to the side baffle, and the side baffle extends in a thickness direction of the bottom plate. The bracket has a plane-symmetric structure relative to a symmetry plane. The bottom plate and the side baffle cooperatively define an accommodating space. The mounting member includes a top plate and a first end plate connected at an angle. The top plate is disposed opposite to and spaced apart from the bottom plate, and the first end plate is disposed opposite to and spaced apart from the side baffle, to define a first airflow channel.