Battery Module Exhaust Guide Structure for Adjacent Module Protection
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Solution Overview
Problem
In battery packs, the discharge of high-temperature heat, gas, and flame from overcharged battery modules can damage adjacent modules due to the lack of directional control, leading to internal pressure issues and potential fires.
Innovation Solution
A battery module design featuring a housing with opposing holes and a discharge guide member that directs gas flow externally, incorporating a flame arresting member to manage and contain potential flames, thereby preventing damage to adjacent modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the frame and end plate are coupled and sealed by welding to ensure sealing performance, then the sealing performance is improved, but when internal pressure exceeds welding strength, high-temperature heat, gas, and flame can be discharged through openings in the end plate, causing damage to adjacent battery modules
Solution Approach 1:
The harmful exhaust gases and heat are extracted and directed through a dedicated exhaust path formed by the discharge guide member, separating the escape route from the sealed housing structure. This allows the welding to maintain sealing performance while the extracted exhaust flow is channeled away from adjacent modules through the guide member's external path
Solution Approach 2:
The discharge guide member acts as an intermediary component between the sealed housing and the external environment. It receives the discharged gases through the opening in the end plate and redirects them along an external path, preventing direct contact with adjacent battery modules while maintaining the integrity of the welded sealing
2Object-generated harmful factors
If openings are formed in the end plate to allow discharge of heat and gas, then the discharge function is improved, but the structural integrity and sealing of the housing are compromised
Solution Approach 1:
The discharge guide member serves as an intermediary that accepts the necessary opening in the end plate while converting it into a controlled exhaust pathway. The guide member's structure redirects the discharged gases externally, so the opening serves its discharge function without compromising the overall sealing integrity of the housing structure
Solution Approach 2:
The end plate is designed with localized differentiating qualities: most of the end plate maintains sealed integrity for structural reliability, while a specific localized region (the opening) is designated for exhaust discharge. The discharge guide member covers this localized opening and directs flow externally, allowing the majority of the housing to maintain its sealing performance
3Volume of moving object
If battery modules are arranged with end plates facing each other to compact the battery pack, then the space utilization is improved, but adjacent modules can be damaged by heat and gas from neighboring modules
Solution Approach 1:
The harmful exhaust flow is extracted from the space between adjacent battery modules and redirected externally through the discharge guide member. This extraction prevents the exhaust from affecting adjacent modules while maintaining the compact arrangement with end plates facing each other
Solution Approach 2:
The discharge guide member acts as a mediator between the internal exhaust source and the external environment, intercepting the discharged gases and redirecting them away from adjacent modules. This allows compact module arrangement while preventing harmful interactions between neighboring modules
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 directional discharge of gases and flames reduces the risk of module damage and extends the lifespan of battery packs by containing high-temperature exhausts and improving flame arrestment.
Implementation Method 1
a discharge guide member that forms a gas flow path inside and outside the housing while covering any one of the pair of holes
Implementation Method 2
incorporating a flame arresting member to manage and contain potential flames
Data Source
AI summary
A battery module includes a housing that houses a battery cell stack in which a plurality of battery cells are stacked and includes a pair of holes formed through a first end plate and a second end plate disposed opposite each other; and a discharge guide member that forms a gas flow path partially through the housing, the discharge guide member configured to cover any one of the pair of holes.