Battery Pack Separation Wall Fins for Thermal Runaway Containment
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Solution Overview
Problem
Conventional battery packs lack an effective structure for dissipating heat generated during charging and discharging processes, particularly when thermal runaway occurs in one battery module, risking heat transfer to neighboring modules and potential explosion.
Innovation Solution
A battery pack design featuring a main separation wall with heat dissipation fins that extend along the longitudinal, width, or diagonal directions, and a base plate with fluid path tubes and auxiliary heat dissipation ribs to rapidly dissipate heat and prevent its transfer to other modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional battery packs use only fluid path tubes in the base plate for cooling, then the structure is simple, but the heat dissipation effectiveness is insufficient and cannot prevent thermal runaway propagation
Solution Approach 1:
The main separation wall is segmented into multiple heat dissipation fins that extend toward the battery modules, creating multiple heat dissipation pathways. This segmentation allows heat to be dissipated at multiple locations simultaneously, improving thermal safety without requiring a completely new structural design
Solution Approach 2:
The heat dissipation structure transitions from a two-dimensional base plate with fluid tubes to a three-dimensional structure with fins extending vertically and horizontally. This adds another dimension for heat dissipation, allowing heat to be conducted through multiple surfaces and directions, thereby improving effectiveness without excessive complexity
2Temperature
If heat dissipation fins are added to the main separation wall, then heat dissipation effectiveness is improved, but the manufacturing complexity increases
Solution Approach 1:
The heat dissipation fins are merged with the main separation wall as an integrated structure rather than separate components. This combining of functions allows the separation wall to serve both its primary purpose of dividing battery modules and its secondary purpose of dissipating heat, thereby improving heat dissipation without significantly increasing manufacturing steps
Solution Approach 2:
The design allows flexibility in fin parameters such as extension length, spacing, and orientation (longitudinal, width, or diagonal directions). These parameter changes enable optimization of heat dissipation performance while maintaining compatibility with existing manufacturing processes for battery pack assembly
3Reliability
If the main separation wall includes heat dissipation fins extending in multiple directions, then heat dissipation coverage is improved, but the device complexity increases
Solution Approach 1:
The main separation wall is designed to perform multiple functions: structural separation of battery modules, heat conduction pathway, and heat dissipation surface. The fins extend in multiple directions (longitudinal, width, or diagonal) to provide universal heat dissipation coverage regardless of the direction of heat flow, thereby improving cooling effectiveness without requiring separate cooling structures for different directions
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
Effectively cools the battery pack during charging and discharging, and in case of thermal runaway, prevents heat transfer to adjacent modules, thereby avoiding explosions.
Implementation Method 1
a heat dissipation part, which includes a heat dissipation fin protruded to allow heat dissipation
Implementation Method 2
the main separation wall includes: a heat dissipation part, which includes a heat dissipation fin protruded to allow heat dissipation
Implementation Method 3
a fluid path tube through which coolant flows may be installed inside a base plate included in a lower part of the pack case
Implementation Method 4
a base plate coupled to each side of the main separation wall, and including a module area in which the battery module is settled
Data Source
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AI summary
Disclosed herein relates to a battery pack for accommodating battery modules, including: a pack case in which a battery module is settled; wherein the pack case includes: a main separation wall; a base plate coupled to each side of the main separation wall, and including a module area in which the battery module is settled; and a side wall coupled along a perimeter of a base plate coupled to the main separation wall; wherein the main separation wall includes: a heat dissipation part, which includes a heat dissipation fin protruded to allow heat dissipation, at a lower part.