Battery Module Fire-Extinguishing Pipe with Metal Knitting Yarns
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Solution Overview
Problem
Existing battery modules lack effective mechanisms to prevent and extinguish thermal runaway, which can lead to instability and potential fire hazards, and current solutions may interfere with module components during assembly.
Innovation Solution
A battery module design incorporating a fire-extinguishing pipe with metal knitting yarns and spacers that extends between battery cells, positioned to rapidly melt and immerse cells in extinguishing agent, while being rigid enough to maintain structural integrity and avoid assembly interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fire-extinguishing pipe is added to the battery module, then thermal runaway prevention and extinguishing capability are improved, but device complexity and assembly interference increase
Solution Approach 1:
The fire-extinguishing pipe is nested inside the spacer structure, with the pipe positioned within the hollow space of the spacer. This integration allows the fire-extinguishing function to be added without increasing overall device complexity, as the pipe utilizes the existing spacer volume rather than adding a separate external component.
Solution Approach 2:
The spacer acts as an intermediary structure that facilitates the integration of the fire-extinguishing pipe. The spacer's hollow space accommodates the pipe, and its guide portions help position the pipe during assembly, thereby reducing assembly complexity while maintaining the thermal runaway prevention function.
2Stability of the object's composition
If the fire-extinguishing pipe is made rigid to maintain structural integrity, then structural stability is improved, but ease of assembly during manufacturing deteriorates
Solution Approach 1:
The guide portions of the spacer serve as intermediary positioning features that facilitate the assembly of the rigid fire-extinguishing pipe. These guide portions align with corresponding features on the pipe, making it easier to install the rigid structure during manufacturing without compromising its structural integrity.
3Temperature
If metal knitting yarns are added to the fire-extinguishing pipe, then heat resistance and structural stability are improved, but manufacturing complexity increases
Solution Approach 1:
The fire-extinguishing pipe is constructed as a composite structure with metal knitting yarns embedded within a polymer matrix material. The metal yarns provide heat resistance and structural stability, while the polymer matrix provides the basic pipe structure. This composite approach allows the pipe to withstand high temperatures during thermal runaway events while maintaining manufacturability through conventional composite fabrication processes.
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 effectively extinguishes thermal runaway by rapidly cooling affected cells and prevents heat transfer, enhancing stability and reducing interference risks, thereby improving the safety and reliability of the battery module.
Implementation Method 1
positioned to rapidly melt and immerse cells in extinguishing agent
Implementation Method 2
The plurality of metal knitting yarns between an inner surface and an outer surface of the fire-extinguishing pipe
Implementation Method 3
immerse cells in extinguishing agent, rapidly cooling affected cells
Data Source
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AI summary
A battery module (100) includes: a plurality of battery cells (110) arranged in parallel in a first direction; a housing (130, 135, 170) accommodating the plurality of battery cells; and a fire-extinguishing pipe (120) in the housing and extending in the first direction. The fire-extinguishing pipe includes a plurality of metal knitting yarns (125) between an inner surface (121) and an outer surface (123) of the fire-extinguishing pipe, and the plurality of metal knitting yarns extend in the first direction and are spaced apart from one another in a circumferential direction of the fire-extinguishing pipe.