Battery Rack Fire Suppression With Perforated Hollow Columns
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Solution Overview
Problem
Energy storage systems, particularly those with lithium-ion battery cells, face challenges in rapidly detecting and mitigating fire events to prevent thermal runaway and explosions, which can lead to cascading failures and safety hazards due to the lack of effective fire detection and suppression mechanisms integrated within the storage containers.
Innovation Solution
A system that includes a battery rack with a hollow, perforated frame for fluid circulation, sensors for ambient condition monitoring, and a controller to trigger fluid release from a storage tank to suppress fires and prevent thermal runaway by directing fire suppression fluid to specific areas within the battery storage container, thereby minimizing heat propagation and potential explosions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fire suppression fluid is stored in external containers, then fire suppression capability is provided, but response time is delayed and thermal runaway cannot be prevented
Solution Approach 1:
The patent integrates fire suppression fluid storage tanks within the hollow interior of battery rack columns, nesting the fire suppression system inside the existing battery rack structure. This allows the suppression fluid to be positioned immediately adjacent to battery cells, enabling instantaneous response to thermal runaway events without external delivery delays
Solution Approach 2:
The fire suppression fluid is pre-positioned within the battery rack structure during system assembly, rather than being delivered from external sources during a fire event. This preliminary placement ensures that suppression material is already in optimal position to immediately address thermal runaway when it occurs
2Difficulty of detecting and measuring
If fire detection systems are added to battery racks, then fire detection capability is improved, but device complexity increases
Solution Approach 1:
The controller serves multiple functions: it monitors battery cell voltage and temperature for charging control, and simultaneously detects fire conditions by monitoring temperature sensors. This multi-functionality allows fire detection capability to be added without requiring a separate dedicated control system, thereby minimizing additional complexity
Solution Approach 2:
Temperature sensors provide continuous feedback to the controller, which compares readings against threshold values and automatically triggers fire suppression when thresholds are exceeded. This feedback mechanism enables automatic fire detection and response without complex manual intervention systems
3Speed
If battery rack columns are made hollow for fluid circulation, then fire suppression delivery is improved, but structural strength is reduced
Solution Approach 1:
The hollow columns are designed with localized reinforcement at critical structural points while maintaining hollow interiors for fluid circulation in non-critical areas. This allows the columns to provide both structural support and fire suppression fluid delivery pathways, achieving a balance between structural strength and fluid delivery capability
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 system effectively suppresses fires and prevents thermal runaway by rapidly delivering fire suppression fluid to affected areas, reducing the risk of secondary fires and explosions, and can be installed in various battery storage containers, including indoor facilities, to enhance safety and minimize damage.
Implementation Method 1
directing fire suppression fluid to specific areas within the battery storage container, thereby minimizing heat propagation
Implementation Method 2
sensors for ambient condition monitoring
Data Source
AI summary
A system includes a battery rack including a frame configured to support a battery tray, the frame including: an inlet fluidly coupled a fluid supply; and a set of columns fluidly coupled to the inlet, each column including perforations arranged on the column and facing an interior of the battery rack, and each column defining a channel configured to circulate fluid from the inlet to the perforations. The system also includes: a valve interposed between the fluid supply and the inlet; a sensor configured to generate a signal representing ambient condition proximal the battery rack; and a controller configured to trigger the valve to transition from a closed state to an open state in response to detecting a precursor condition to a fire event based on the signal.