Battery Firefighting Pipe Layout for Thermal Runaway Cooling
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Solution Overview
Problem
Existing battery designs face challenges in efficiently cooling battery cells during thermal runaway, as the arrangement of firefighting pipes often results in high pressure near drainage openings, hindering the flow of firefighting media and reducing cooling efficiency.
Innovation Solution
The battery incorporates a staggered arrangement of firefighting pipes with drainage openings relative to pressure relief mechanisms, allowing smooth discharge of firefighting media to cool the battery cells, and includes adaptive bending portions and thermosensitive sealing members to enhance cooling efficiency and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the firefighting pipe is arranged directly opposite the pressure relief mechanism, then the cooling effect is maximized, but the external pressure at the drainage opening becomes too high, hindering the flow of firefighting medium
Solution Approach 1:
The firefighting pipe is arranged in a staggered (asymmetric) position relative to the pressure relief mechanism, rather than directly opposite. This asymmetric arrangement reduces the external pressure at the drainage opening while still allowing the firefighting medium to effectively cool the battery cell when the pressure relief mechanism is activated.
2Ease of operation
If the firefighting pipe is arranged in a staggered manner, then the firefighting medium flows smoothly, but the cooling efficiency may be reduced
Solution Approach 1:
The firefighting pipe extends in multiple directions (first direction along the longitudinal axis, second direction perpendicular to the first direction) to create a three-dimensional cooling coverage. This multi-dimensional arrangement allows the firefighting medium to flow smoothly through the staggered configuration while still achieving effective cooling of the battery cell from multiple angles.
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 configuration ensures timely and efficient cooling of battery cells during thermal events, improving safety and reliability by preventing damage to firefighting pipes and ensuring effective discharge of cooling media.
Implementation Method 1
the firefighting medium enters the battery cell via the pressure relief mechanism to cool the battery cell
Data Source
AI summary
A battery and an electric apparatus are described. The battery includes a firefighting pipe and a plurality of battery cells provided with a pressure relief mechanism. The pressure relief mechanism is configured to be actuated and release internal pressure in a first direction when the internal pressure or temperature of the battery cell reaches a threshold; the firefighting pipe is arranged on a side of the plurality of battery cells that is provided with the pressure relief mechanism, and is disposed in a staggered manner with the pressure relief mechanism; and the firefighting pipe is provided with a drainage opening, where the drainage opening is configured to discharge a firefighting medium toward the pressure relief mechanism when the pressure relief mechanism is actuated, so as to cool the battery cell. The battery allows the firefighting medium to more quickly cool a battery cell, thereby improving safety of the battery.