Battery Module Fire Suppression With Auxiliary Spray Tank Pressure Backup
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Solution Overview
Problem
Existing fire extinguishing systems in energy storage systems face challenges in effectively suppressing high-pressure fires due to decreasing spray pressure and extinguishing capability over time, particularly when the primary fire extinguishing agent is depleted.
Innovation Solution
Incorporation of an additional spray tank containing a second fire extinguishing agent, which is activated to supplement the primary agent when pressure drops, ensuring continuous fire suppression by adjusting the spray through a fluidizer mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a main spray tank with a first fire extinguishing agent is used, then initial fire suppression capability is improved, but spray pressure and extinguishing capability decrease over time as the agent is depleted
Solution Approach 1:
The fire extinguishing system is divided into two independent spray tanks: a main spray tank containing a first fire extinguishing agent and an additional spray tank containing a second fire extinguishing agent. Each tank operates independently to provide fire suppression at different stages, ensuring continuous effectiveness throughout the entire fire event duration.
Solution Approach 2:
The additional spray tank is pre-configured with a vent portion that ruptures at a predetermined pressure threshold. When the main spray tank depletes and pressure drops, the vent portion automatically ruptures to activate the additional spray tank, ensuring seamless continuation of fire suppression without manual intervention.
2Duration of action of stationary object
If the spray system operates continuously, then fire suppression is maintained, but spray pressure decreases as the first fire extinguishing agent is depleted
Solution Approach 1:
The vent portion acts as an intermediary mechanism between the main spray tank and the additional spray tank. It monitors the pressure level and automatically activates the additional spray tank when pressure drops below the threshold, serving as a pressure-maintaining intermediary that ensures continuous effective spray pressure.
Solution Approach 2:
The system changes the fire extinguishing agent parameter from a single agent to two different agents. The first fire extinguishing agent is used during the high-pressure initial phase, and the second fire extinguishing agent is activated when pressure drops, maintaining effective fire suppression throughout the entire duration by adapting to changing pressure parameters.
3Device complexity
If a single spray tank is used, then device complexity is reduced, but the system cannot maintain consistent pressure throughout operation
Solution Approach 1:
The spray system dynamically transitions from a single-tank configuration to a two-tank configuration based on operational needs. The additional spray tank remains dormant during initial operation and only activates when pressure drops below the threshold, providing dynamic pressure compensation without requiring complex continuous monitoring or control systems.
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
Enhances fire extinguishing capability by maintaining consistent pressure and agent supply, preventing secondary fires and thermal runaway, thereby improving safety in energy storage systems.
Implementation Method 1
a fluidizer passing through between the spray portion and the tank portion to adjust the spray of the second fire extinguishing agent
Implementation Method 2
The vent portion may block an end portion of the spray portion. The vent portion may include a rupture disk that ruptures when the first fire extinguishing agent is sprayed from the main spray tank
Implementation Method 3
The plug portion may further include a spring portion extending in a longitudinal direction of the plug portion in a center of the plug portion. The spring portion may be fixed to a second tank neck portion
Data Source
AI summary
An energy storage system includes a plurality of battery modules each including a plurality of batteries, a main spray tank including a first fire extinguishing agent, a pipe portion connecting the main spray tank to the plurality of battery modules, and an additional spray tank arranged in a certain area of the pipe portion between the plurality of battery modules and the main spray tank. The additional spray tank includes a second fire extinguishing agent.