Battery Pack Bottom Cover Venting Structure for Valve Protection
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Solution Overview
Problem
Existing battery pack explosion-proof valves in electric vehicles are prone to damage during assembly and transportation due to their plastic exhaust members, which are not easily visible and can lead to safety hazards.
Innovation Solution
Integrating an exhaust pipe and cover plate body into a single, metal bottom cover plate, ensuring the explosion-proof valve is mounted directly opposite to the exhaust pipe, reducing the risk of damage during assembly and ensuring smooth gas discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the exhaust member is made of plastic, then the assembly process is easier and cost is reduced, but the exhaust member is prone to damage during assembly and transportation
Solution Approach 1:
The exhaust member material is changed from plastic to metal, fundamentally altering the material parameter to achieve both improved durability and acceptable assembly characteristics. This material substitution resolves the contradiction by providing a substance that combines the necessary strength with manufacturability.
Solution Approach 2:
The exhaust member is designed as a composite structure combining metal material with specific structural features (threaded portion, engagement structures) that integrate it with the battery housing. This composite approach allows the metal to provide durability while the engineered structures ensure proper assembly and connection.
2Ease of manufacture
If the exhaust member is made of plastic, then the manufacturing cost is reduced, but the exhaust member is easily damaged during transportation and loading
Solution Approach 1:
The material parameter is changed from plastic to metal, which inherently provides superior strength and damage resistance during transportation and handling. This parameter change directly addresses the strength deficiency while maintaining manufacturing feasibility through standard metal forming processes.
3Device complexity
If the exhaust member position is concealed, then the assembly process is simplified, but the failure of the explosion-proof valve is less noticeable and leads to safety hazards
Solution Approach 1:
The exhaust member is designed with a protruding portion that extends beyond the battery housing surface, creating a visible and accessible feature. This geometric modification allows the concealed component to be both integrated into the housing structure and easily locatable for assembly and inspection purposes.
Data Source
AI summary
Provided are a battery pack explosion-proof structure, a battery pack, and an electric vehicle. The battery pack explosion-proof structure includes a bottom cover plate and an explosion-proof valve. The bottom cover plate includes a cover plate body and an exhaust pipe that are integrally formed. The exhaust pipe is disposed on a side of the cover plate body and extends in a direction away from the cover plate body. The gas inlet of the exhaust pipe is opened in the cover plate body. The explosion-proof valve is connected to a side of the cover plate body away from the exhaust pipe. A valve port of the explosion-proof valve is directly opposite to the gas inlet or is connected into the exhaust pipe.