Battery Box Valve for Fire-Fighting Medium Injection
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Solution Overview
Problem
During thermal runaway of lithium-ion batteries, fire-fighting mediums may not effectively enter the battery box body, leading to poor fire control and increased risk of large-area thermal diffusion.
Innovation Solution
A valve with a medium injection port connected to a fire-fighting device, where a closing member opens the port when internal pressure or temperature reaches a threshold, allowing the fire-fighting medium to enter and cool the battery cell, thereby controlling the fire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery box body is sealed to protect the battery cell, then the battery is protected from liquid or foreign matters, but fire-fighting medium cannot effectively enter the battery box during thermal runaway
Solution Approach 1:
The closing member is divided into a temperature-responsive portion and a pressure-responsive portion, creating segmented response mechanisms that separately handle thermal and pressure conditions during thermal runaway
Solution Approach 2:
The closing member responds to changes in temperature and pressure parameters by undergoing phase changes or deformation, automatically opening the sealed box body when threshold values are reached during thermal runaway
2Object-affected harmful factors
If a closing member is added to control medium injection, then fire-fighting medium can be introduced effectively, but the valve structure becomes more complex
Solution Approach 1:
The closing member automatically opens in response to temperature and pressure changes during thermal runaway without requiring external control systems, sensors, or power sources, thereby simplifying the overall valve structure while maintaining effective fire-fighting medium injection capability
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 effectively relieves pressure and introduces fire-fighting media into the battery box, quickly controlling fires and reducing economic losses by ensuring the fire-fighting medium can reach the battery cell within the box body.
Implementation Method 1
when a pressure or a temperature inside a box body reaches a threshold
Implementation Method 2
when a pressure or a temperature inside a box body reaches a threshold
Data Source
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AI summary
Embodiments of the present application provide a valve, a battery, a power consumption device and an apparatus and a method for manufacturing the valve, and belong to the technical field of batteries. The valve includes a valve body and a closing member, the valve body being configured to be mounted on a box body, and the valve body being provided with a medium injection port configured to be connected to a fire-fighting device. The closing member is connected to the valve body and closes the medium injection port, and the closing member is configured to open the medium injection port when a pressure or a temperature inside the box body reaches a threshold, so as to relieve the pressure inside the box body and allow the fire-fighting device to inject a fire-fighting medium into the box body through the medium injection port. Thefire-fighting device can be connected to the medium injection port, and the fire-fighting medium provided by the fire-fighting device can enter the box body through the medium injection port, so as to cool the battery cell inside the box body and reduce the risk of large-area thermal diffusion of the battery cell inside the box body, thereby quickly and effectively controlling fire inside the box body and reducing economic losses caused by the fire.