Battery Containment Venting and Cooling for Thermal Runaway
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Solution Overview
Problem
Energy storage systems, particularly chemical accumulators, pose a risk of uncontrolled energy release leading to thermal energy emission, fires, and the emission of toxic gases, with existing countermeasures insufficient to prevent ignition and lasting fire suppression.
Innovation Solution
A containment system for energy storage devices featuring a sealed container with a mounting for energy storage units, a connection duct for fluid supply, and an exhaust socket for gas discharge, designed to minimize damage and protect people from heat and toxic gases, using fluid-tight and heat-resistant materials, and incorporating fire protection devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If energy storage systems are used to store electrical power for later use, then energy availability is improved, but the risk of uncontrolled energy release and fire increases
Solution Approach 1:
The energy storage system is divided into multiple individual accumulators housed in separate containers within the containment structure. Each accumulator is isolated in its own mounting, creating physical segments that prevent fire propagation between units. The containment itself is segmented into multiple compartments or zones that can independently contain thermal events.
Solution Approach 2:
A containment structure with active cooling systems and fire suppression mechanisms serves as an intermediary between the energy storage accumulators and the surrounding environment. This intermediary layer absorbs and manages thermal energy through controlled fluid circulation and heat exchange, preventing uncontrolled energy release while maintaining safe operation of the energy storage devices.
2Object-generated harmful factors
If conventional fire extinguishing methods are applied to ignited accumulators, then initial flames may be suppressed, but lasting fire suppression cannot be achieved
Solution Approach 1:
The containment system implements preliminary cooling actions through continuous fluid circulation and heat exchange systems that operate before thermal runaway occurs. Temperature sensors and control systems detect early thermal increases and activate cooling mechanisms in advance, preventing ignition rather than responding after flames appear. This preliminary intervention maintains accumulators in a safe thermal state.
Solution Approach 2:
The containment employs continuous active cooling systems that constantly circulate coolant through heat exchange surfaces in contact with accumulators. This continuous thermal management action maintains safe operating temperatures throughout the energy storage system's operation, providing uninterrupted protection against thermal runaway rather than intermittent or reactive fire suppression.
3Productivity
If accumulators are installed in vehicles or households, then energy density and transportability are improved, but the potential damage from faults increases
Solution Approach 1:
The containment structure incorporates thermal insulation layers, heat-absorbing materials, and protective barriers that cushion against thermal events before they can cause extensive damage. These protective elements absorb excess thermal energy and slow heat propagation, creating a buffer zone between potential fire sources and the vehicle or household environment.
Solution Approach 2:
The containment system creates an inert or controlled atmosphere around accumulators through gas circulation systems that flood the containment space with fire-suppressing gases or inert atmospheres. This inert environment prevents oxygen-fed combustion and neutralizes fire hazards while maintaining the high energy density benefits of accumulator technology in mobile and household applications.
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 containment system effectively minimizes damage from energy storage system faults by controlling fluid flow for fire suppression and gas discharge, ensuring safety from heat and toxic emissions, and preventing the spread of flames and hazardous gases.
Implementation Method 1
The containment (1) comprises a mounting (110) for an energy storage device (115), in particular for a chemical energy storage device such as an accumulator, and a cooling device (180), through which a fluid can be passed in order to cool the energy storage device (115)
Implementation Method 2
a cooling device (180), through which a fluid can be passed in order to cool the energy storage device (115)
Data Source
AI summary
A containment for an energy storage device comprising a container, a mounting for an energy storage device, a connection socket and connection duct, and an exhaust duct. The containment can be used to permanently extinguish the energy storage device in the event of a fault without endangering the environment.