Battery Pack Cooling Plate for Cell Vent Heat Containment
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Solution Overview
Problem
Existing battery packs face challenges in preventing heat propagation from one battery cell to another and in avoiding casing sagging, especially when a predetermined event occurs in a battery cell.
Innovation Solution
A battery pack design that includes a plurality of battery cells with vents, a cover member, and a cooling plate with vent protruding portions and a flange portion. The cooling plate is in contact with the cover member and includes features that guide gases away from adjacent cells, thereby reducing heat transfer and preventing casing sagging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling plate is added to reduce heat propagation, then heat management is improved, but device complexity increases
Solution Approach 1:
The cooling plate is designed to serve multiple functions: it cools battery cells through thermal contact, blocks heat propagation via its heat-blocking material composition, and prevents casing sagging through its rigid structure. This multi-functionality reduces the need for separate components, thereby managing device complexity while addressing heat management challenges.
Solution Approach 2:
The cooling plate acts as an intermediary component positioned between the battery cells and the external environment. It mediates heat transfer by providing a thermal barrier while maintaining controlled thermal contact with cells, thus reducing heat propagation without requiring direct modification of the battery cell structure.
2Reliability
If vent protruding portions are designed to guide gases away, then safety is improved, but manufacturing precision requirements increase
Solution Approach 1:
The cooling plate features localized vent protruding portions at specific positions corresponding to battery cell vents. These protrusions create localized gas discharge pathways that guide gases away from adjacent cells. The local modification approach allows for effective gas management without requiring high-precision manufacturing across the entire cooling plate structure.
3Stability of the object's composition
If the cooling plate contacts the cover member to prevent sagging, then structural stability is improved, but heat blocking effectiveness may be reduced
Solution Approach 1:
The cooling plate's function is segmented into distinct regions: contact areas with the cover member for structural support and non-contact areas for heat blocking. This segmentation allows the plate to provide mechanical stability through cover member contact while maintaining heat blocking effectiveness in critical thermal zones through its heat-resistant material properties.
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 heat propagation between battery cells and prevents casing sagging by utilizing the cooling plate's vent protruding portions and flange portion to manage heat and gas discharge efficiently.
Implementation Method 1
a cooling plate, which is located in an area in which the vents are located and is in contact with the cover member
Implementation Method 2
the cooling plate includes vent protruding portions located corresponding to the vents and protruding in a direction opposite the cover member
Data Source
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AI summary
A battery pack (100) capable of, upon occurrence of an event in a certain battery cell (110), reducing propagation of heat to a cell (110) adjacent thereto and capable of preventing or substantially preventing sagging of a casing is provided. A battery pack includes a plurality of battery cells including vents, each of which is located in a surface of a respective one of the plurality of battery cells, a cover member (150) configured to accommodate the plurality of battery cells (110), and a cooling plate (170), which is located in an area in which the vents are located and is in contact with the cover member (150). The cooling plate (170) includes vent protruding portions (171a) located corresponding to the vents and protruding in a direction opposite the cover member (150).