EV Battery Pack Case With Integrated Gas Storage Fire Suppression
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Solution Overview
Problem
Conventional battery packs for electric vehicles face issues with fire extinguishing systems that fail to operate effectively due to high temperatures damaging control devices, and there is a risk of gas backflow and incomplete agent distribution.
Innovation Solution
A battery pack case design with integrated gas storage units and spray plates, controlled by a temperature-sensitive mechanism, ensures fire extinguishing agent is sprayed efficiently even at high temperatures, preventing backflow and ensuring comprehensive coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate gas storage tank and pump are used for fire suppression, then fire extinguishing capability is provided, but the system fails to operate when control device is damaged at high temperature
Solution Approach 1:
The patent extracts the fire suppression function from the control system and implements it through passive physical mechanisms. Gas storage tanks are pre-filled and positioned to automatically discharge through spray plates when temperature rises, eliminating the need for active control devices that fail at high temperatures.
Solution Approach 2:
The fire suppression system operates autonomously using temperature-sensitive mechanisms. The gas storage tanks and spray plates work together without requiring external control signals, allowing the system to self-activate when thermal runaway occurs, ensuring reliability in high-temperature environments.
2Loss of substance
If a two-way flow method is used to recover gas, then gas recovery is achieved, but gas may flow backward making actual operation impossible
Solution Approach 1:
Instead of using a complex two-way flow control system that risks backward flow, the patent inverts the approach by using one-way check valves that only allow gas to flow in the intended direction. This simple inversion of the flow control mechanism eliminates the risk of backward flow while maintaining gas recovery capability.
3Ease of operation
If a separate injector is used to spray fire extinguishing agent, then spray function is provided, but the injector may be damaged due to high temperature causing hole blockage
Solution Approach 1:
The patent replaces the vulnerable injector with simple, robust spray plates that have multiple holes directly formed in them. These spray plates are designed to withstand high temperatures and can be easily replaced if needed, eliminating the complexity and temperature sensitivity of traditional injectors.
Solution Approach 2:
Instead of using a single-point injector that is vulnerable to blockage, the patent transitions to a distributed spray plate system with multiple holes across a larger surface area. This dimensional change from point-source to distributed-source spray provides redundancy and maintains functionality even if individual holes become partially blocked.
4Strength
If gas storage devices are integrated with partition walls and outer wall, then structural rigidity is maintained, but manufacturing complexity increases
Solution Approach 1:
The patent merges the gas storage function with the structural partition walls and outer wall of the battery pack. By integrating gas storage tanks into existing structural components rather than adding separate elements, the design maintains structural rigidity while avoiding the complexity of assembling multiple separate parts.
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 solution enables rapid and effective fire suppression within the battery pack, maintaining structural rigidity and preventing external fire spread, while optimizing internal space utilization.
Implementation Method 1
one or more gas storage devices that store gas
Implementation Method 2
a plurality of spray plates that spray gases introduced from the one or more gas storage devices
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A battery pack case for an electric vehicle is provided. The battery pack includes: a lower case including an outer wall and one or more partition walls therein, each of the outer wall and the one or more partition walls including one or more gas storage devices that store gas; and an upper case connected to the lower case and including spray plates that spray gases introduced from the one or more gas storage devices. The one or more gas storage devices are integrated with the one or more partition walls and the outer wall of the lower case, and the battery pack case accommodates one or more battery modules.