Battery Module Base Plate Venting for Flame-Safe Cooling
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Solution Overview
Problem
High-capacity battery packs face challenges in preventing secondary ignition or explosion and achieving effective cooling, as air cooling methods can propagate flames between batteries, increasing the risk of fire and instability.
Innovation Solution
A battery module design featuring a base plate with elongated gas discharge passages covered by anti-inflammatory mesh sheets, a cooling member with coolant channels, and thermally conductive pads, along with a bus bar assembly and covers to manage heat and prevent flame propagation, using a liquid coolant for indirect cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air cooling method is used to discharge heat from secondary batteries, then cooling efficiency is improved, but flame propagation risk increases
Solution Approach 1:
The patent introduces a flame-proof mesh sheet as an intermediary component that covers the gas discharge passage. This mesh sheet allows heat to be dissipated while blocking flame propagation, thus mediating between the cooling requirement and flame prevention requirement. The mesh structure permits thermal energy transfer but prevents combustible gas and flame from passing through.
Solution Approach 2:
The patent creates a flame-proof environment by covering the gas discharge passage with a flame-proof mesh sheet. This effectively creates an inert barrier that prevents oxygen from supporting combustion and blocks flame propagation, while still allowing heat to escape. The mesh sheet transforms the potentially hazardous gas discharge environment into a safe, flame-proof zone.
2Temperature
If gas discharge passage is opened to discharge combustible gas, then cooling efficiency is improved, but secondary ignition risk increases
Solution Approach 1:
The flame-proof mesh sheet serves as an intermediary that allows heat and gas to pass through while blocking flame. This mediator enables the gas discharge function to maintain cooling efficiency while preventing the harmful effect of flame escape that would cause secondary ignition.
Solution Approach 2:
The patent extracts the flame propagation risk from the gas discharge system by introducing the flame-proof mesh sheet. The mesh sheet separates the combustible gas discharge function from the flame propagation hazard, allowing the system to maintain gas discharge capability while eliminating the secondary ignition risk.
3Power
If high-capacity battery pack is designed to increase power output, then energy density is improved, but heat generation and stability risks increase
Solution Approach 1:
The flame-proof mesh sheet acts as an intermediary safety component that enables high-capacity battery operation by preventing flame propagation between cells. This mediator allows the system to operate at high power levels while maintaining stability by blocking the primary failure mode of thermal runaway propagation.
Solution Approach 2:
The patent applies beforehand cushioning by pre-installing flame-proof mesh sheets in the gas discharge passages before any thermal runaway event occurs. This preventive measure cushions against potential flame propagation and secondary ignition, allowing the high-capacity battery pack to operate safely despite the inherent risks of high energy density.
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 design effectively reduces the risk of secondary ignition and explosion by preventing flame transfer and enhancing cooling efficiency, thereby increasing the safety and stability of the battery module.
Implementation Method 1
at least one anti-inflammatory mesh sheet configured to cover the open portion
Implementation Method 2
a cooling member having a coolant channel elongated in at least one direction to communicate with the outside, a coolant injection port for injecting a coolant and a coolant discharge port for discharging the coolant
Implementation Method 3
a cooling member having a coolant channel elongated in at least one direction to communicate with the outside
Implementation Method 4
thermally conductive pads
Data Source
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AI summary
Disclosed is a battery module that reduces the risk of secondary ignition or explosion and increases cooling efficiency. The battery module includes a cell assembly having a plurality of secondary batteries stacked on each other in a front and rear direction; and a base plate configured such that the plurality of secondary batteries of the cell assembly are mounted to an upper portion thereof, the base plate including at least one gas discharge passage having a sidewall elongated in the front and rear direction to communicate with the outside and an open portion formed by opening a portion of the sidewall in one direction and at least one anti-inflammatory mesh sheet configured to cover the open portion.