Battery Pack Heat-Absorbing Channel Layout for Uniform Cell Cooling
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Solution Overview
Problem
Current battery packs face issues with uneven heat dissipation, where cells at the center of the array dissipate heat slowly, leading to premature thermal protection activation and reduced user experience.
Innovation Solution
A battery pack design incorporating a heat dissipation assembly with a heat-absorbing member and a heat-conducting member that forms channels around the battery cells, enhancing heat absorption and dissipation across the battery cell array, including the use of shape-stabilized phase change materials and heat-conducting structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery cells are arranged in a compact array to increase energy density, then the quantity of battery cells increases, but the heat dissipation efficiency of center cells deteriorates
Solution Approach 1:
The patent introduces heat dissipation channels that segment the battery cell array into distinct thermal zones, allowing center cells to have dedicated heat dissipation pathways independent of edge cells. This segmentation resolves the contradiction by enabling compact arrangement while maintaining heat dissipation efficiency through separated thermal management zones.
Solution Approach 2:
The patent adds a vertical dimension to heat dissipation by introducing heat dissipation channels extending along the length of the battery pack, transforming the traditional planar heat dissipation approach into a three-dimensional thermal management system. This allows center cells to dissipate heat effectively without increasing lateral spacing.
2Quantity of substance
If battery cells are arranged in a compact array to increase energy density, then the quantity of battery cells increases, but the temperature uniformity across the array deteriorates
Solution Approach 1:
The heat dissipation channels segment the battery array into multiple thermal management zones, with each channel serving specific cells. This segmentation ensures that temperature variations in edge cells do not directly affect center cells, maintaining temperature uniformity across the entire array while allowing compact arrangement.
Solution Approach 2:
The heat dissipation channels act as intermediary thermal pathways between battery cells and the external environment, mediating heat transfer to prevent direct thermal coupling between adjacent cells. This intermediary structure promotes temperature uniformity by distributing heat flow evenly across the battery array.
3Device complexity
If no additional heat dissipation structure is added to maintain simple device structure, then the device complexity remains low, but the heat dissipation performance of center cells deteriorates
Solution Approach 1:
The heat dissipation channels serve multiple functions simultaneously: they provide thermal management for center cells, act as structural support elements, and contribute to the overall mechanical integrity of the battery pack. This multi-functionality improves heat dissipation performance without significantly increasing device complexity.
Solution Approach 2:
The patent merges the heat dissipation function with the structural framework of the battery pack by integrating heat dissipation channels into the existing cell arrangement. This combination approach improves center cell heat dissipation while minimizing additional structural complexity through unified design.
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 achieves balanced temperature distribution, extends the working time of the battery cells, and reduces decay rates, thereby prolonging the service life of the battery pack.
Implementation Method 1
a heat-absorbing member disposed in the channel, and the heat-absorbing member including N side walls, wherein the N side walls respectively abut against the side walls of the N battery cells
Implementation Method 2
the heat dissipation assembly comprises a heat-conducting member in contact with the heat-absorbing member to dissipate the heat absorbed by the heat-absorbing member
Implementation Method 3
including the use of shape-stabilized phase change materials and heat-conducting structures
Data Source
AI summary
The invention provides a battery pack comprising a battery cell assembly and a heat dissipation assembly. The battery cell assembly comprises a battery cell array and a channel arranged in the battery cell array. The battery cell array is formed by arranging a plurality of cells in a certain form. The channel is enclosed by N cells, wherein N>2. The heat dissipation assembly comprises a heat-absorbing member arranged in the channel. The heat-absorbing member comprises N side walls, wherein the N side walls respectively abut against the side walls of the N battery cells. Compared with the prior art, the battery pack has the advantages that the battery pack assists the battery cell assembly in heat dissipation through the heat dissipation assembly, which can make the temperature of each area of the battery cell assembly more balanced.