Battery Cell Heat-Conducting Paths for Early Safety Device Activation
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Solution Overview
Problem
Existing storage devices for electrical energy in motor vehicles lack effective safety measures to prevent thermal events from propagating and causing premature fire or flames, especially during accidents, due to inadequate heat management and activation of safety devices.
Innovation Solution
Incorporating a thermally conductive heat-transferring element that selectively transfers heat from one storage cell to another, allowing for early and controlled activation of safety devices to counteract thermal events, thereby preventing excessive heating and potential fires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If safety devices are activated early to counteract thermal events, then safety is improved, but premature activation may occur causing unnecessary intervention
Solution Approach 1:
The patent applies preliminary action by pre-positioning heat-conducting elements in thermal contact with storage cells and safety devices before any thermal event occurs. These elements remain inactive until a thermal event generates heat, at which point they automatically transfer heat to activate the safety device. This preliminary arrangement enables rapid response without premature activation, as the heat transfer mechanism is dormant until needed.
Solution Approach 2:
The patent uses heat-conducting elements as intermediaries between storage cells and safety devices. These intermediaries selectively transfer heat only when a thermal event occurs, acting as a mediator that distinguishes between normal operating temperatures and dangerous thermal events. This intermediary mechanism prevents premature activation while ensuring timely safety intervention when actually needed.
2Reliability
If heat is transferred selectively from one storage cell to another, then thermal propagation is controlled, but heat transfer efficiency may be insufficient to activate safety devices in time
Solution Approach 1:
The patent applies local quality by providing heat-conducting elements selectively at specific locations between storage cells and safety devices, rather than uniform heat distribution throughout the entire battery pack. Each heat-conducting element is positioned to transfer heat locally from a affected storage cell to its corresponding safety device, enabling targeted and efficient heat transfer where needed most.
Solution Approach 2:
The patent employs composite material structures combining storage cells with integrated heat-conducting elements and safety devices. This composite design creates direct thermal pathways that accelerate heat transfer speed while maintaining selective heat transfer capability, ensuring safety devices are activated rapidly in response to thermal events.
3Reliability
If multiple safety devices are provided for each storage cell, then safety coverage is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing safety devices that serve multiple functions: they act as both safety mechanisms for thermal event mitigation and as heat transfer destinations for the heat-conducting elements. This multi-functionality reduces overall system complexity while maintaining comprehensive safety coverage across all storage cells.
Solution Approach 2:
The patent merges the safety device function with the heat transfer mechanism by positioning safety devices in direct thermal contact with storage cells through heat-conducting elements. This merging eliminates the need for separate detection and activation systems, reducing device complexity while ensuring comprehensive safety coverage through the integrated thermal response mechanism.
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
This solution enables selective and efficient activation of safety devices, effectively managing thermal propagation and preventing premature or excessive heating, ensuring safer operation of the storage device and reducing the risk of fire and flames in motor vehicles.
Implementation Method 1
at least one thermally conductive heat-conducting element (9), which functions as a heat-transferring element, is provided, by means of which element heat can be transferred selectively from at least one of the storage cells (2, 3, 4) to at least one of the safety devices (13) of the respective other storage cells (2, 3, 4)
Data Source
AI summary
A storage device for storing electrical energy includes at least two storage cells. Each storage cell has a cell housing, an accommodating space delimited by the cell housing, and at least one storage element for storing electrical energy. The storage element is accommodated in the accommodating space. At least one thermally conductive heat-conducting element is provided, by which heat can be deliberately transferred from a first of the storage cells to the second storage cell.