Cartridge Battery Module Structure for Thermal Propagation Control
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Solution Overview
Problem
Existing battery modules are prone to rapid heat propagation, increasing the risk of fires due to thermal propagation among battery cells, which is not effectively mitigated by current designs.
Innovation Solution
A cartridge-type secondary battery module design featuring a cooling plate with high thermal conductivity and a blocking member to manage heat transfer, along with a shock absorption layer to alleviate pressure from swelling cells, ensuring the module has at least one open surface for efficient heat dissipation and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If battery cells are arranged in a closed housing structure, then structural integrity is improved, but heat dissipation deteriorates leading to thermal propagation
Solution Approach 1:
The housing is divided into multiple compartments by partition walls, with through-holes providing controlled openings. This segmentation allows the structure to maintain integrity while creating pathways for heat dissipation between cells.
Solution Approach 2:
The partition walls are equipped with through-holes at specific locations to enable localized heat dissipation. This allows different regions of the housing to have different thermal properties, with heat escape paths strategically positioned to prevent thermal propagation while maintaining overall structural strength.
2Temperature
If cooling plates are added to improve heat dissipation, then temperature control is improved, but device complexity increases
Solution Approach 1:
The partition walls serve multiple functions: they provide structural support, create compartmentalization, and incorporate through-holes for heat dissipation. This multi-functionality reduces the need for separate cooling components, thereby controlling device complexity while achieving temperature management.
Solution Approach 2:
The through-holes in partition walls act as intermediaries for heat transfer, allowing thermal energy to pass between compartments without requiring complex active cooling systems. This passive heat dissipation mechanism simplifies the overall device complexity.
3Reliability
If blocking members are inserted to prevent thermal propagation, then safety is improved, but manufacturing complexity increases
Solution Approach 1:
The blocking members are integrated into the partition wall structure as through-holes, creating segmented pathways that allow controlled heat dissipation. This segmentation approach prevents thermal propagation while maintaining a relatively simple manufacturing process compared to complex blocking mechanisms.
Solution Approach 2:
The through-holes in partition walls passively enable heat dissipation without requiring additional active components or complex control systems. The structure itself provides the safety function, eliminating the need for separate blocking members that would increase manufacturing complexity.
4Temperature
If open surfaces are created in the housing, then heat dissipation is improved, but structural integrity deteriorates
Solution Approach 1:
The housing employs partition walls with through-holes rather than large open surfaces. This segmentation maintains structural integrity by preserving most of the housing material while creating sufficient heat dissipation pathways through the distributed holes in the partitions.
Solution Approach 2:
Openings are localized to specific through-holes in partition walls rather than large open surfaces. This localized approach allows heat dissipation at critical thermal pathways while maintaining overall structural integrity of the housing by minimizing the total open area.
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 significantly reduces the risk of catastrophic fires in electric or hybrid vehicles by effectively managing heat transfer and pressure within the battery module, enhancing safety and longevity.
Implementation Method 1
a cooling plate in contact with at least one of the secondary battery cells
Implementation Method 2
at least one shock absorption layer disposed between at least one of the secondary battery cells and a closed end wall of the cartridge, and configured to be elastically compressed by swelling of the secondary battery cell upon heating
Data Source
AI summary
A cartridge type secondary battery module includes a plurality of secondary battery cells; and a cartridge comprising an accommodating portion in which the plurality of secondary battery cells are accommodated, a cooling plate in contact with at least one of the secondary battery cells, and a blocking member in contact with at least one of the secondary battery cells, wherein the accommodating portion comprises at least one open surface.