Battery Box Separator Layout for Uniform Coolant Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery packs experience uneven heat exchange due to coolant distribution, leading to premature aging and reduced capacity of some cells, which affects the overall service life.
Innovation Solution
A separator and tray design that guides coolant flow uniformly across cells, ensuring each cell is immersed in coolant for effective heat exchange, using flow guiding assemblies and cavities to enhance heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If coolant is introduced from one liquid inlet and flows to one liquid outlet, then the battery pack achieves heat dissipation, but the heat exchange effect is uneven with cells away from the inlet contacting less coolant
Solution Approach 1:
The battery box is divided into multiple independent cooling channels, each with its own liquid inlet. This segmentation allows coolant to be distributed to multiple regions simultaneously, ensuring uniform heat exchange across all cells rather than having a single flow path that creates temperature gradients.
Solution Approach 2:
Different regions of the battery box are provided with dedicated cooling channels and inlets tailored to their specific heat dissipation needs. This ensures that each local region receives appropriate coolant flow, achieving uniform heat exchange performance across the entire battery pack.
2Device complexity
If coolant flows from one inlet to one outlet through the battery box, then the structure remains simple, but cells away from the inlet cannot be immersed in low-temperature coolant
Solution Approach 1:
The cooling system is segmented into multiple independent channels, each serving a specific region. This segmentation maintains relative structural simplicity while dramatically improving heat exchange effectiveness by ensuring all cells are properly cooled.
Solution Approach 2:
The cooling system transitions from a one-dimensional linear flow path to a multi-dimensional distributed network of cooling channels. This dimensional change allows coolant to reach multiple regions simultaneously, improving heat exchange effectiveness without proportionally increasing complexity.
3Temperature
If cells are immersed in coolant for heat exchange, then heat dissipation is achieved, but some cells age prematurely due to poor heat exchange effect
Solution Approach 1:
By dividing the cooling system into multiple channels, each cell or group of cells has dedicated coolant flow, ensuring uniform heat exchange. This prevents localized overheating that would cause premature aging and extends overall battery service life.
Solution Approach 2:
Each local region has optimized cooling channels ensuring that every cell receives adequate coolant flow for heat exchange. This uniform local quality of cooling prevents thermal stress and premature aging, extending the stationary object's service life.
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
Improves heat exchange uniformity and extends the service life of battery packs by ensuring all cells are uniformly cooled, preventing premature aging and maintaining capacity.
Implementation Method 1
The coolant is introduced into the liquid inlet. After the cells are immersed in the coolant, the coolant flows out from the liquid outlet. The coolant is cooled outside the battery box and then is delivered to the liquid inlet after cooling. As such, the cells of the battery module are cooled.
Implementation Method 2
The coolant flows from the liquid inlet through the cells to the liquid outlet, carrying heat away from the cells and achieving cooling through convective heat transfer.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Provided are a separator (2), a battery box (100), and a battery pack. The separator is applied to the battery box (100) and includes a first body and a first flow guiding assembly (2021,2022). The first body is provided with a return hole (2011) and multiple mounting holes (2012) passing through the first body in a first direction. The multiple mounting holes (2012) are located between the liquid outlet region and the return hole (2011). The first flow guiding assembly and the liquid outlet region are located on the same side surface of the first body. The first flow guiding assembly includes multiple first flow guiding grooves (2021). The first flow guiding assembly is configured to guide a coolant in the region in which the battery module is located to the liquid outlet region.