Battery Module Cooling Guidance Unit for Uniform Heat Dissipation
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Solution Overview
Problem
High-capacity rechargeable battery modules face challenges in effective heat dissipation, leading to temperature deviations among unit cells, which can degrade battery capacity and potentially cause explosions, especially when used in high-power applications like electric vehicles.
Innovation Solution
The battery module incorporates a guidance unit within the housing to circulate a cooling medium efficiently through cell assemblies, using a guidance plate and protrusions to ensure uniform heat dissipation, minimizing inter-unit cell temperature deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a plurality of unit cells are serially connected to form a high-capacity battery module, then the electrical power output is improved, but the heat generated increases leading to temperature deviation and capacity deterioration
Solution Approach 1:
The patent applies local quality by providing separate cooling passages for different regions of the battery module. Specifically, first cooling passages are provided for first group unit cells and second cooling passages for second group unit cells, allowing different cooling conditions to be applied to different locations based on their specific thermal characteristics and power output levels.
Solution Approach 2:
The patent segments the cooling system into multiple independent cooling passages grouped by specific unit cells. The cooling passages are divided into first cooling passages and second cooling passages, with each group serving specific unit cells. This segmentation allows independent temperature control for different regions of the battery module.
2Device complexity
If conventional cooling structures are used, then the device complexity is low, but the cooling efficiency is insufficient leading to elevated internal temperature
Solution Approach 1:
The cooling structure is segmented into multiple independent cooling passages (first cooling passages and second cooling passages) that are integrally formed with the housing. This segmentation provides efficient cooling for different unit cell groups while maintaining a relatively simple overall structure through integral formation.
Solution Approach 2:
The housing serves multiple functions: it encloses the battery module components and simultaneously forms the cooling passages integrally. The housing thus acts as both a structural enclosure and a thermal management system, reducing the need for separate cooling components and simplifying the overall device complexity.
3Power
If high electric current is used to charge and discharge the battery module for high-power applications, then the power output is improved, but the internal temperature is elevated causing capacity deterioration
Solution Approach 1:
The patent provides differentiated cooling for different unit cell groups through separate cooling passages. Unit cells experiencing higher temperature rise due to high current operation can receive targeted cooling, allowing the battery module to sustain high power output while controlling local temperature elevation.
Solution Approach 2:
The cooling passages are designed to continuously circulate cooling medium through all unit cells during charge and discharge operations. This continuous cooling action ensures that heat generated during high-power operation is constantly removed, maintaining temperature control throughout the battery module's operational cycle.
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 solution enhances temperature control and uniform heat dissipation across the battery module, preventing capacity degradation and explosion risks, while maintaining battery performance in high-power applications.
Implementation Method 1
a housing for mounting the cell assemblies therein and circulating a temperature control cooling medium through the cell assemblies
Implementation Method 2
circulating a temperature control cooling medium through the cell assemblies
Data Source
AI summary
A battery module includes one or more cell assemblies with a plurality of unit cells, and a housing for mounting the cell assemblies therein and circulating a temperature control cooling medium through the cell assemblies. The cell assemblies are arranged in the longitudinal direction of the housing. A guidance unit is installed in a cooling medium passage formed in the longitudinal direction of the housing, and proceeds along the passage to guide cooling medium flow along the passage toward the cell assemblies.