Vehicle Battery Pack Duct Assembly for Uniform Cooling
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Solution Overview
Problem
In vehicle battery packs, the cooling air is warmed by battery modules while passing through distribution ducts, leading to inefficient cooling, with modules on one end being less cooled than those on the other end, resulting in uneven cooling efficiency.
Innovation Solution
A vehicle battery pack design featuring a duct assembly with a first duct, an intersecting connection duct, and second ducts that split air to efficiently cool multiple battery modules, including first and second modules positioned below and shifted from the first duct, with through holes connecting gaps between adjacent modules for direct air supply, ensuring uniform cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling air is sent from one end side to the other end side through a main air duct and returned to cool multiple battery modules, then the battery modules on the other end side are cooled effectively, but the battery modules on the one end side are less likely to be cooled efficiently
Solution Approach 1:
The air duct system is segmented into multiple independent ducts (first air duct, second air duct, third air duct) that branch from the main air duct. Each duct independently supplies cooling air to different regions of battery modules, preventing the progressive heating that occurs in a single linear duct and ensuring uniform cooling across all modules.
Solution Approach 2:
Different regions of the battery pack are provided with dedicated air supply paths. The first air duct supplies air to battery modules in a first region, the second air duct to battery modules in a second region, and the third air duct to battery modules in a third region. This localizes the cooling function to each region, ensuring that cooling air does not traverse the entire length and accumulate heat.
2Device complexity
If a single main air duct is used to supply cooling air to multiple battery modules, then the structure is simple, but the air distribution to different battery modules is uneven
Solution Approach 1:
The single main air duct is segmented into multiple branch ducts (first, second, and third air ducts) that extend in different directions. This segmentation allows cooling air to be distributed to multiple regions simultaneously, achieving uniform air distribution across different battery modules while maintaining a relatively simple overall structure based on the main duct.
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
This design enables efficient cooling of all battery modules by ensuring air is distributed uniformly, preventing overheating and maintaining optimal operating temperatures across the battery pack.
Implementation Method 1
a blower as a supply source of air sent to cool the multiple battery modules
Data Source
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AI summary
[Problem to be Solved] An object of the present invention is to cool multiple battery modules of a vehicle battery pack efficiently. [Solution] A vehicle battery pack of the present invention includes multiple battery modules, a cooling device that cools the multiple battery modules, and a battery case that accommodates the multiple battery modules and the cooling device. The cooling device has a duct assembly that allows passage of air from a blower, a second duct of the duct assembly has multiple second duct bodies that split air having passed through an intersecting connection duct from the first duct, the multiple battery modules include multiple first battery modules disposed in an area below the first duct, and multiple second battery modules disposed so as to be shifted in at least one of the horizontal directions from the multiple first battery modules, the first duct has a through hole that penetrates its bottom wall so as to supply air to a gap between adjacent first battery modules, and the second duct body sends air toward the second battery module.