Server Rack Battery Fire Suppression for Thermal Runaway Isolation
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Solution Overview
Problem
High energy density lithium ion batteries in server racks pose a significant safety risk due to thermal runaway events, which can cause damage to surrounding electronic equipment and potentially flood an entire data center with fire suppression systems, risking hardware damage.
Innovation Solution
A fire suppressant system with a reservoir-based or cooling fluid diversion mechanism that detects thermal runaway events early, isolates the affected battery feature, and delivers pressurized fire suppressant or redirects cooling fluid to contain the fire, protecting surrounding equipment without flooding the data center.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a fire sprinkler system responds to a thermal runaway event, then fire suppression is achieved, but the entire data center is flooded potentially damaging hardware
Solution Approach 1:
The fire suppression system is segmented into individual battery feature compartments, each with its own fire suppressant reservoir and dispensing mechanism. This allows localized suppression of thermal runaway events in a single battery feature without flooding the entire data center, thus achieving fire protection while avoiding widespread water damage to hardware.
Solution Approach 2:
The system applies fire suppressant locally to the specific battery feature experiencing thermal runaway rather than uniformly across the entire data center. Each battery feature has dedicated suppressant storage and dispensing components positioned to target only the affected area, minimizing collateral damage from water flooding while effectively suppressing the fire.
2Use of energy by moving object
If high energy density lithium ion batteries are used, then energy efficiency is improved, but safety risk increases due to thermal runaway potential
Solution Approach 1:
The system performs preliminary detection of thermal runaway conditions through temperature sensors and preemptively activates fire suppressant dispensing before full combustion occurs. This early intervention approach allows the system to respond to thermal runaway events at their inception, protecting high energy density batteries from catastrophic failure while maintaining their energy efficiency benefits.
Solution Approach 2:
The fire suppressant acts as an intermediary substance between the thermal runaway event and surrounding equipment. The suppressant chemically intervenes in the thermal runaway process, inhibiting the exothermic reactions and preventing fire propagation to adjacent battery features and electronic equipment, thus enabling the use of high energy density batteries with reduced safety risk.
3Object-affected harmful factors
If fire suppressant is dispensed to suppress fire, then fire is extinguished, but surrounding electronic equipment is damaged by the suppressant
Solution Approach 1:
The fire suppressant delivery system is segmented into individually addressable battery feature compartments with controlled dispensing pathways. This segmentation ensures that suppressant is delivered only to the specific battery feature experiencing thermal runaway and is contained within that compartment, preventing suppressant from reaching and damaging surrounding electronic equipment in other battery features.
Solution Approach 2:
The system employs localized suppressant dispensing with directional nozzles and containment structures that confine the suppressant to the immediate vicinity of the affected battery feature. This local application minimizes suppressant exposure to surrounding electronic equipment, reducing the risk of suppressant-induced damage while maintaining effective fire suppression in the targeted area.
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 suppresses fires in individual battery features, preventing damage to surrounding electronics and avoiding extensive data center flooding, while being retrofittable without altering the server rack design.
Implementation Method 1
a metallic filament thermal event detector in direct contact with the valve, the valve configured to open based on a high temperature reading from the metallic filament thermal event detector
Implementation Method 2
Fire suppressant is provided to a single integrated battery feature... effectively suppresses fires in individual battery features
Data Source
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AI summary
An apparatus for a fire suppressant system on a server rack includes an integrated battery feature, a manifold, a conduit, and a control card, where the integrated battery feature includes a plurality of battery cells in an enclosure. A first end of the conduit coupled to a control valve on the manifold and a second end of the conduit coupled to the integrated battery feature. The control card configured to open the control valve on the manifold, where the control valve is configured to release a fire suppressant into the enclosure of the integrated battery feature. In one embodiment, the fire suppressant is contained within a pressurized fire suppressant reservoir mounted on the server rack. In another embodiment, the fire suppressant is a cooling fluid diverted from a radiator cooling unit on the server rack.