Battery Pack Venting Structure for Downward Gas Discharge
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Solution Overview
Problem
Conventional battery packs suffer from reduced energy density due to large plate members and additional components, and pose safety risks from gas emission during overheating or fires.
Innovation Solution
A battery pack design with a vent portion directing gas outwards, a compact pack case structure, and integrated cooling channels, along with a safety space below the pack to guide gas away from the vehicle's occupants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional components such as top cover and heat sink are added to the battery pack, then safety and cooling functions are improved, but total energy density decreases
Solution Approach 1:
The patent integrates the heat sink function directly into the pack case structure, merging the cooling component with the housing. This eliminates the need for separate heat sink components while maintaining cooling functionality, thereby improving energy density without sacrificing safety or cooling performance
2Strength
If conventional pack case structure with multiple plate members is used, then structural strength is maintained, but total size increases and energy density decreases
Solution Approach 1:
The patent integrates multiple structural functions into a single pack case body, combining the housing and structural support functions. This reduces the number of separate plate members and components, minimizing pack size while maintaining structural strength through the integrated design
3Object-generated harmful factors
If vent portion directs gas upward, then gas emission function works, but safety of driver and passengers is compromised
Solution Approach 1:
The patent inverts the conventional venting direction by directing the vent portion to face downward instead of upward. This causes gas to be emitted downward away from the driver and passenger compartment, maintaining the gas emission function while improving safety by redirecting harmful gases away from occupants
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
Enhances energy density and safety by minimizing the pack's size and directing hazardous gases away from the vehicle's interior during overheating or fires.
Implementation Method 1
at least one battery cell including a vent portion to force gas out
Implementation Method 2
The pack cover may have a cooling channel inside to cool the at least one battery cell
Implementation Method 3
The pack cover may have a cooling channel inside to cool the at least one battery cell
Data Source
AI summary
A battery pack according to an embodiment of the present disclosure includes at least one battery cell including a vent portion configured to force gas out; and a pack case in which the at least one battery cell is accommodated such that the vent portion faces a lower side of the battery pack. The vent portion is exposed from the battery pack.