Battery Cell Venting With Fire-Fighting Barrier Between Adjacent Cells
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Solution Overview
Problem
Existing battery technologies face challenges in ensuring safety during thermal runaway events, as high-temperature and high-pressure emissions can cause short circuits and further safety hazards between adjacent battery cells.
Innovation Solution
A battery design incorporating a pressure relief mechanism with a fire-fighting pipeline and a blocking component that prevents the fire-fighting medium from flowing between adjacent cells, using a blocking component with a higher melting point to prevent particle splashing and a fire-fighting pipeline to cool and reduce temperature effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure relief mechanism is provided on each battery cell to release high-temperature and high-pressure gas during thermal runaway, then the internal pressure of the battery cell can be relieved, but the released gas can cause short circuits and safety hazards between adjacent battery cells
Solution Approach 1:
The patent introduces a fire-fighting pipeline as an intermediary component between adjacent battery cells. This pipeline is positioned to receive discharged gas from the pressure relief mechanism and directs it away from neighboring cells, preventing direct contact and potential short circuits. The pipeline acts as a mediator that manages the harmful discharge path.
Solution Approach 2:
The patent extracts the harmful high-temperature gas discharge path from the immediate vicinity of adjacent battery cells by using a fire-fighting pipeline. The pipeline separates the discharge path from the vulnerable areas of neighboring cells, removing the direct harmful interaction between thermal runaway emissions and adjacent cells.
2Temperature
If a fire-fighting pipeline is used to cool and reduce temperature of discharged gas, then the temperature of the gas can be reduced, but the fire-fighting medium may flow from one battery cell to another causing short circuits
Solution Approach 1:
The patent applies local quality by providing blocking components at specific locations where the fire-fighting medium might flow between cells. These blocking components are strategically positioned to prevent cross-cell flow of the cooling medium while allowing the cooling function to operate in the necessary areas. The blocking components create localized barriers only where needed.
Solution Approach 2:
The blocking components act as intermediaries between the fire-fighting pipeline and the battery cells. They prevent the fire-fighting medium from becoming a conductive path between cells while still allowing the cooling function to reduce gas temperature. The blocking components mediate between the need for cooling and the risk of creating electrical pathways.
3Reliability
If blocking components are provided to prevent fire-fighting medium flow between cells, then short circuit risk is reduced, but the complexity of the battery structure increases
Solution Approach 1:
The patent employs blocking components that can be implemented as thin barriers or films positioned within the existing battery structure. These components provide the necessary blocking function without adding significant structural complexity or volume. The thin-film approach allows for integration into the existing battery design with minimal additional complexity.
4Stress or pressure
If the pressure relief mechanism is actuated to relieve internal pressure, then the internal pressure is reduced, but high-temperature particles can splash and cause damage to adjacent cells
Solution Approach 1:
The fire-fighting pipeline serves as an intermediary that captures and redirects the high-temperature particle discharge from the pressure relief mechanism. Instead of particles directly contacting adjacent cells, the pipeline intercepts and channels them away, preventing damage to neighboring cells while maintaining the pressure relief function.
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 design enhances safety by preventing short circuits and reducing the risk of thermal runaway propagation between battery cells, improving the overall safety performance of the battery.
Implementation Method 1
a pressure relief mechanism, the pressure relief mechanism being disposed on a first wall of the first battery cell, the pressure relief mechanism being configured to be actuated when an internal pressure or temperature of the first battery cell reaches a threshold, to relieve the internal pressure
Implementation Method 2
a fire-fighting pipeline configured to introduce a fire-fighting medium toward the first wall when the pressure relief mechanism is actuated
Implementation Method 3
a blocking component configured to block the fire-fighting medium discharged from the fire-fighting pipeline from flowing from the first battery cell to a second battery cell
Implementation Method 4
using a blocking component with a higher melting point to prevent particle splashing
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Embodiments of the present application relates to a battery, a power consumption device, and a method and device for producing a battery. The battery includes: a first battery cell and a second battery cell adjacent to each other, the first battery cell including a pressure relief mechanism, the pressure relief mechanism being disposed on a first wall of the first battery cell, and the pressure relief mechanism being configured to be actuated when an internal pressure or temperature of the first battery cell reaches a threshold, to relieve the internal pressure; a fire-fighting pipeline configured to accommodate a fire-fighting medium and discharge the fire-fighting medium toward the first wall when the pressure relief mechanism is actuated; and a blocking component protruding from the first wall along a first direction, the first direction being a direction perpendicular to the first wall, and the blocking component being configured to block the fire-fighting medium discharged from the fire-fighting pipeline from flowing from the first battery cell to the second battery cell. The battery, the power consumption device, and the method and device for producing the battery in the embodiments of the present application could improve the safety performance of the battery.