Battery Module Venting Cover for Thermal Runaway Flame Suppression
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Solution Overview
Problem
Existing battery modules face challenges in safely managing high-temperature heat, gas, and flame generated during thermal runaway, which can lead to damage to adjacent modules and electrical components within the battery pack.
Innovation Solution
A battery module design featuring a module frame with venting holes and an anti-inflammatory cover that includes a micro-perforated structure to rapidly discharge high-temperature gas and suppress flame discharge, while a bus bar cover part protects exposed terminal bus bars from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If venting holes are formed in the module frame to discharge high-temperature gas, then gas discharge capability is improved, but flame may be discharged to adjacent modules causing chain ignition
Solution Approach 1:
The anti-inflammatory cover is designed with a micro-perforated structure containing numerous small holes. This porous configuration allows high-temperature gas to be discharged through the holes while the collective structure of the micro-perforations suppresses flame discharge, thereby resolving the contradiction between gas discharge capability and flame prevention.
2Ease of operation
If terminal bus bars are exposed through connection openings for electrical connection, then electrical connectivity is improved, but bus bars are vulnerable to damage from high-temperature fragments and flames
Solution Approach 1:
The bus bar cover part acts as an intermediary protective structure that covers the exposed terminal bus bars. It allows electrical connection to be maintained while protecting the bus bars from direct exposure to high-temperature fragments and flames discharged during thermal runaway, thus resolving the contradiction between electrical connectivity and thermal protection.
3Object-affected harmful factors
If a solid cover is used to protect against flame discharge, then flame protection is improved, but high-temperature gas cannot be discharged effectively
Solution Approach 1:
Instead of using a solid cover, the invention employs an anti-inflammatory cover with a micro-perforated structure. The numerous small holes provide sufficient total area for effective gas discharge while the micro-perforation design collectively suppresses flame discharge, thereby resolving the contradiction between flame protection and gas discharge efficiency.
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 prevents the transfer of high-temperature fragments and flames to adjacent modules, thereby minimizing damage to internal components and preventing chain ignition within the battery pack.
Implementation Method 1
high-temperature heat, gas, and flame generated in the battery cell 11 may be discharged to the outside of the battery cell 11
Implementation Method 2
an anti-inflammatory part including a micro-perforated structure
Implementation Method 3
the anti-inflammatory cover configured to cover the plurality of venting holes
Implementation Method 4
a bus bar cover part corresponding to an upper portion of the end plate
Data Source
AI summary
A battery module includes a battery cell stack in which a plurality of battery cells is stacked; a module frame configured to accommodate the battery cell stack and including a plurality of venting holes in at least one surface; end plates disposed at both sides of the battery cell stack; and an anti-inflammatory cover configured to cover the plurality of venting holes.