Battery Fire Extinguishing System with Melting-Point Seals
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Solution Overview
Problem
Existing fire extinguishing systems for electric vehicle batteries discharge extinguishing liquid unnecessarily, potentially wetting the battery and causing damage, and lack efficient mechanisms to prevent accidental discharge during normal operations.
Innovation Solution
A fire extinguishing system with a case containing a liquid passage around the battery, sealed discharge ports that open at high temperature, and an external device for controlled liquid introduction, including a temperature sensor to manage charging modes and liquid flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the discharge port is opened in advance, then the extinguishing water can be discharged toward the battery module quickly, but the extinguishing water may be discharged unnecessarily when there is no battery fire, wetting the battery
Solution Approach 1:
The patent changes the state of the discharge port from permanently open to temperature-dependent. The sealing material transitions from solid (sealed state) to liquid (open state) at a specific melting temperature, allowing the discharge port to open only when the battery temperature reaches the melting point, thus preventing unnecessary discharge while enabling quick response when needed
Solution Approach 2:
The sealing material acts as an intermediary between the discharge port and the extinguishing water. This intermediary component responds to temperature changes by changing its physical state, thereby controlling the discharge port's openness and preventing unnecessary wetting of the battery while allowing controlled discharge when the battery is actually on fire
2Ease of operation
If the sealing melts at a low temperature, then the discharge port opens easily, but the extinguishing liquid may discharge accidentally during normal operation
Solution Approach 1:
The patent selects a melting temperature for the sealing material that is specifically higher than the normal operating temperature of the battery. This parameter selection ensures that the discharge port remains sealed during normal operation (reliability) but opens easily when the battery temperature reaches the melting point (ease of operation), thus resolving the contradiction between ease of operation and reliability
3Productivity
If the extinguishing liquid is always ready to discharge, then fire extinguishing response is fast, but energy and liquid are wasted when no fire occurs
Solution Approach 1:
The patent prepares the extinguishing liquid in advance in the liquid passage, but the discharge port remains sealed by the melting-point-sensitive sealing material. This preliminary action ensures that the liquid is ready for immediate discharge when needed (high productivity), while the sealed discharge port prevents waste during normal operation (reduced energy and liquid loss)
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
Effectively extinguishes battery fires while preventing unnecessary liquid discharge, optimizing charging efficiency, and reducing energy waste by controlling liquid flow and temperature management.
Implementation Method 1
the sealing melts at a temperature equal to or higher than a predetermined melting temperature to open the discharge port
Data Source
AI summary
A fire extinguishing system configured to extinguish a battery fire is provided, and the system may include: a case accommodating a battery and including a liquid passage arranged around the battery, an inlet port configured to introduce extinguishing liquid into the liquid passage, and a discharge port configured to discharge the extinguishing liquid within the liquid passage toward the battery; and sealing which seals the outlet, in which the sealing melts at a temperature equal to or higher than a predetermined melting temperature to open the discharge port.