Battery Box Body With Integrated Firefighting Agent Chambers
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Solution Overview
Problem
Existing battery technologies face safety issues during thermal runaway, with discharged emissions posing a risk of fire and explosion due to high temperature and concentration, and existing fire suppression systems are either slow or inefficient.
Innovation Solution
A box design with integrated fire-fighting agent chambers that communicate upon thermal runaway, allowing rapid release of fire-fighting medium to extinguish fires and dilute emissions, featuring controlled release mechanisms and conduits for targeted fire suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fire suppression systems use combustible sheets that melt during thermal runaway, then fire extinguishing chemicals can be released, but the response time is delayed and the system is unreliable
Solution Approach 1:
The patent replaces the mechanical melting mechanism of combustible sheets with a pressure-driven valve system. The valve body includes a valve opening that is normally blocked by a blocking member, and when thermal runaway occurs, the pressure difference drives the blocking member to automatically open the valve, enabling faster and more reliable fire suppression agent release without depending on thermal melting processes.
Solution Approach 2:
The patent utilizes pressure differential mechanisms to control the release of fire suppression agents. The valve system responds to pressure changes during thermal runaway, where the pressure difference between the interior and exterior of the battery pack automatically actuates the blocking member to open or close the valve opening, providing a responsive and reliable fire suppression system.
2Productivity
If fire suppression agents are stored in separate containers, then the system structure is simple, but the release mechanism is slow and less effective
Solution Approach 1:
The patent integrates the fire suppression agent storage function directly into the valve body structure. The valve body serves dual purposes: as a structural component of the release mechanism and as a container for storing the fire suppression agent. This merging of functions eliminates the need for separate storage containers and complex release mechanisms, achieving fast and effective fire suppression while maintaining structural simplicity.
3Reliability
If the valve opening remains open during normal operation, then fire suppression agent can be quickly released, but the agent leaks and the system becomes unreliable
Solution Approach 1:
The patent implements a blocking member that pre-closes the valve opening during normal operation to prevent fire suppression agent leakage. When thermal runaway occurs, the pressure differential automatically actuates the blocking member to open the valve, ensuring the system remains reliable during normal use while enabling rapid agent release when needed. This preliminary blocking action prevents premature discharge while maintaining readiness for emergency response.
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
Enhances safety by quickly extinguishing fires and reducing the concentration of combustible gases, ensuring the battery's integrity and preventing further accidents.
Implementation Method 1
a liquid or solid fire-fighting agent capable of phase-change to a gas state upon contact with the emissions from the thermal runaway of the battery cell
Implementation Method 2
the fire-fighting medium dilutes the concentration of the emissions produced by the thermal runaway
Data Source
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AI summary
A box body (31), a battery (30), an electric device, and a manufacturing method for the battery (30), relating to the technical field of energy storage devices. The box body (31) is used for the battery (30); the battery (30) comprises battery cells (32); the box body (31) comprises a plurality of box walls (310); the plurality of box walls (310) define a first chamber (311) used for accommodating the battery cells (32); a second chamber (3101) used for accommodating a firefighting agent is formed in at least one box wall (310); and the first chamber (311) and the second chamber (3101) are configured to be capable of being communicated with each other when the battery cells (32) are in thermal runaway, so that the firefighting agent releases a firefighting medium into the first chamber (311). The box body (31), the battery (30), the electric device, and the manufacturing method for the battery (30) can improve the safety performance of the battery (30).