Double-Shell Battery Explosion Box With Flame-Arresting Exhaust
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing explosion-proof boxes fail to effectively contain and control the spread of flame, heat, and pressure during battery combustion, posing risks to safety.
Innovation Solution
The explosion-proof box features a double-layered design with an inner and outer shell separated by support members, a flame arresting device with exhaust passages and recesses, and a high-temperature resistant sealing strip, along with ceramic insulation panels and a detachable smoke discharging system to manage heat and flame dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-shell explosion-proof box is used, then the structure is simple, but the flame spread control and heat insulation performance are insufficient
Solution Approach 1:
The explosion-proof box is divided into an inner shell and an outer shell, creating a segmented structure. The inner shell contains the battery and initial combustion, while the outer shell provides additional protection. This segmentation allows the system to maintain reliability for flame containment while managing complexity through functional division of the shell structure.
Solution Approach 2:
The inner shell is nested within the outer shell, forming a concentric dual-shell structure. This nesting arrangement enables the system to achieve enhanced flame containment and heat insulation performance without significantly increasing overall volume, while the shared structural framework helps control complexity.
2Temperature
If the inner shell directly contacts the outer shell, then the structure is simple, but heat conduction causes the outer shell temperature to exceed safe limits
Solution Approach 1:
A heat insulation layer is introduced as an intermediary substance between the inner shell and outer shell. This heat insulation layer acts as a thermal barrier that blocks heat conduction from the inner shell to the outer shell, ensuring the outer shell temperature remains below 100°C. The intermediary layer effectively resolves the thermal management issue while the support members maintain structural integrity.
Solution Approach 2:
The heat insulation space created between the inner and outer shells introduces a dimensional separation that physically interrupts the thermal conduction path. By creating a gap dimension between the shells, the system prevents direct thermal contact while maintaining structural connection through support members, effectively controlling outer shell temperature.
3Object-generated harmful factors
If exhaust passages are added to discharge combustion gases, then smoke discharge capability is improved, but flame energy may escape through the passages
Solution Approach 1:
The exhaust passage is equipped with localized flame-arresting recesses at critical positions where flame escape is most likely. These recesses create local flame-trapping zones that allow smoke to pass through while blocking flame propagation. The local quality enhancement at the exhaust passage interface resolves the contradiction by enabling smoke discharge while maintaining flame containment through targeted flame-arresting features.
Solution Approach 2:
The exhaust passage structure is designed to convert the potential harm of flame escape into a beneficial flame-arresting mechanism. The recesses in the exhaust passage create turbulence and heat dissipation zones that actually help contain the flame while allowing smoke to escape, transforming what could be a weakness into a strength for flame containment.
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 prevents the spread of flame and maintains the outer shell temperature below 100°C, ensuring safety by containing combustion within the box and allowing for quick replacement of components.
Implementation Method 1
The recesses are disposed on the inner surface of the exhaust passage for absorbing heat energy
Implementation Method 2
a heat insulation space is provided between the inner shell and the outer shell, and the heat insulation space is configured to prevent energy transfer through contact-based heat conduction from the inner shell to the outer shell
Implementation Method 3
the energy from flame can be absorbed through the recesses provided in the flame arresting device, thus effectively preventing the spread of flame
Data Source
AI summary
An explosion-proof box for batteries is provided, including: an outer shell; an inner shell, the inner shell being positioned inside the outer shell; and a flame arresting device, the flame arresting device running through both the outer shell and the inner shell, where the flame arresting device includes: an exhaust passage configured to discharge gases generated within the inner shell to the outside of the outer shell; and recesses disposed on the inner surface of the exhaust passage for absorbing heat energy.