Battery Module Guide Blades for Targeted Cell Fire Suppression
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Solution Overview
Problem
Existing fire extinguishing systems for battery modules often damage unaffected battery cells when water is used, and there is a need for a method to effectively guide a halogen compound gas-based extinguishing agent to a specific battery cell without affecting others.
Innovation Solution
A battery module design with guide blades that rotate in response to gas pressure to direct a halogen compound fire extinguishing agent specifically to the affected cell, using a bus bar assembly and module case structure to contain and inject the agent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water is injected into the battery module to extinguish fire in a specific battery cell, then the fire in the affected cell is extinguished, but the remaining battery cells are damaged by flooding and cannot be reused
Solution Approach 1:
The battery module is divided into individual cell compartments with separate fire extinguishing capabilities. Each battery cell has its own gas injection path through the guide blade structure, allowing targeted fire suppression in one cell without affecting others. This segmentation enables independent treatment of each cell, preventing cross-contamination of extinguishing agents.
Solution Approach 2:
The guide blade assembly acts as an intermediary structure that directs the fire extinguishing agent from the injection source to the specific affected battery cell. The guide blade with its opening facing the affected cell controls the flow path of the gas-based agent, ensuring it reaches only the intended target and not other cells.
2Object-generated harmful factors
If a gas-based fire extinguishing agent is used to extinguish fire in a specific battery cell, then damage to other battery cells is minimized, but the agent must be effectively guided to the specific cell without affecting others
Solution Approach 1:
The guide blade structure provides localized fire extinguishing capability by directing the gas-based agent specifically to the affected cell. The opening in the guide blade is positioned to face only the affected battery cell, creating a localized treatment zone that spares other cells from exposure to the extinguishing agent.
Solution Approach 2:
The guide blade is designed to rotate in response to gas pressure, dynamically adjusting its orientation to optimize the delivery path of the extinguishing agent. This dynamic adjustment ensures accurate targeting of the affected cell while maintaining the ability to adapt to different fire scenarios.
3Object-affected harmful factors
If guide blades are designed to rotate by gas pressure to direct the extinguishing agent, then targeted fire extinguishing is achieved, but the structure becomes more complex
Solution Approach 1:
The guide blade mechanism is actuated automatically by the gas pressure of the fire extinguishing agent itself, without requiring external actuators or control systems. The gas pressure that drives the extinguishing agent also rotates the guide blade to the correct orientation, making the system self-regulating and reducing mechanical complexity.
Solution Approach 2:
The guide blade combines multiple functions into a single component: it serves as both the flow path for the extinguishing agent and the directional control mechanism. The rotation capability is integrated into the guide blade structure itself, merging the flow guidance and directional control functions that would otherwise require separate mechanisms.
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 solution allows targeted fire extinguishing without damaging unaffected cells, enabling reuse of all battery cells and minimizing thermal runaway spread.
Implementation Method 1
when gas is generated in at least one battery cell, rotate by a certain angle due to gas pressure
Data Source
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AI summary
According to the present disclosure, there may be provided a battery module including: a cell assembly including battery cells arranged to face each other in one direction; a bus bar assembly coupled to a side surface of the cell assembly on which electrode leads of the battery cells are located; and guide blades arranged in front of the bus bar assembly in a direction corresponding to an arrangement direction of the battery cells, wherein each of the guide blades has a plate surface facing at least one battery cell, and is coupled to the bus bar assembly to, when gas is generated in at least battery cell, rotate by a certain angle due to gas pressure.