Battery Case Venting Partition for Thermal Runaway and Particle Blocking
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Solution Overview
Problem
Providing through holes in battery cases to address thermal runaway leads to the ingress of external metal particles, causing insulation failure.
Innovation Solution
A case design with through holes blocked by a partition member that melts during thermal runaway, allowing gas discharge while preventing particle ingress and enhancing assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the partition member blocks the through hole to prevent particle ingress, then insulation failure risk is reduced, but thermal runaway discharge capability is compromised
Solution Approach 1:
The partition member serves itself by using the heat from thermal runaway to trigger its own melting and opening of the through hole. This self-activating mechanism ensures reliable thermal discharge without requiring external control systems, while maintaining particle blocking during normal operation
Solution Approach 2:
The harmful high temperature during thermal runaway is converted into a beneficial trigger that opens the partition member. The same heat that poses a risk is utilized to activate the safety discharge mechanism, transforming the harmful factor into a useful function
2Object-affected harmful factors
If a partition member is added to block through holes, then particle protection is improved, but device complexity increases
Solution Approach 1:
The partition member is implemented as a thin, flexible component that can be easily integrated into the case structure. This simple geometric form minimizes the increase in device complexity while effectively performing the particle blocking function and enabling thermal discharge through melting
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
Reduces insulation failure risk by blocking impurities and promptly discharging heat, thereby minimizing combustion or explosion hazards.
Implementation Method 1
the partition member blocks the through hole at a location thereof
Implementation Method 2
the partition member is configured to be capable of being melted through when thermal runaway occurs in the battery cell
Implementation Method 3
the high-temperature gas generated due to thermal runaway can be discharged to the outside of the case through the through holes
Data Source
AI summary
A box body, a battery, and an electrical device, the box body comprising a main box body and a separator. Through holes are formed on the main box body, and the separator is arranged in the main box body and blocks the through holes. The separator is configured to be melted through when thermal runaway occurs in a battery cell. In the embodiments of the present application, the separator can block the through holes, such that the inside and outside of the main box body are not in communication, and impurities such as metal particles outside of the main box body cannot enter the main box body from the through holes, thereby reducing the probability of insulation failure caused by metal particles outside of the main box body entering the main box body.