Battery Module Busbar Venting Structure for Flame Redirection
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Solution Overview
Problem
Conventional battery modules face issues with high-temperature heat and flame discharge during ignition, which can damage adjacent modules and cause chain ignition in the battery pack due to the exposure of terminal busbars and module connectors.
Innovation Solution
The battery module incorporates a first and second busbar frame with venting-preventing parts that guide high-temperature heat, gas, and flame away from the HV connection structure, using a first end plate with openings for LV connection and a second end plate with venting holes to direct discharge in a controlled manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If terminal busbar openings and module connector openings are formed in the end plate for electrical connection, then electrical connectivity is enabled, but high-temperature heat and flame can be discharged to the outside causing damage to adjacent modules
Solution Approach 1:
A heat-resistant cover is introduced as an intermediary component between the terminal busbar opening/module connector opening and the external environment. This cover selectively blocks the discharge of high-temperature heat and flame while permitting electrical connection functionality, thus mediating between electrical connectivity requirements and heat discharge prevention
Solution Approach 2:
The heat-resistant cover creates a protected environment around the electrical connection components, effectively isolating them from external thermal hazards and preventing the propagation of heat and flame to adjacent modules, similar to how an inert atmosphere protects against reactive harmful factors
2Ease of operation
If end plates with openings are used for terminal busbar and module connector exposure, then electrical components are accessible, but flame can affect adjacent battery modules causing chain ignition
Solution Approach 1:
The heat-resistant cover serves as a protective intermediary that maintains component accessibility for electrical connections while simultaneously acting as a fire barrier to prevent flame propagation to adjacent modules, thus resolving the contradiction between accessibility and fire safety
Solution Approach 2:
The heat-resistant cover provides beforehand protection by pre-blocking the flame discharge path before ignition can affect adjacent modules. This preventive measure cushions against potential fire hazards while maintaining normal operational accessibility of electrical components
Data Source
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AI summary
A battery module according to one embodiment of the present disclosure includes: a battery cell stack in which a plurality of battery cells including electrode leads protruded in mutually opposite directions are stacked; a module frame that houses the battery cell stack; and a first busbar frame arranged on one surface of the battery cell stack in one direction in which the electrode leads protrude, wherein the first busbar frame comprises a first venting-preventing part protruded toward between the electrode leads of adjacent battery cells.