Battery Pack Heat Exchange Channels for Uniform Cell Temperature
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Solution Overview
Problem
Electric vehicle battery packs face challenges in maintaining consistent working temperatures, which affects their performance and service life due to inadequate temperature regulation.
Innovation Solution
A battery pack design incorporating multiple heat exchange spaces with a heat conduction medium passage featuring two groups of channels with opposite flow directions and a heat insulation layer between them, ensuring efficient heat exchange and temperature consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a battery pack is designed without adequate heat exchange structures, then the device complexity is reduced, but the temperature regulation performance deteriorates
Solution Approach 1:
The heat exchange device is segmented into multiple independent channels (first group and second group of channels) with opposite flow directions. Each channel group independently manages heat exchange in specific regions, allowing modular design that improves temperature regulation while keeping each module relatively simple
Solution Approach 2:
Different regions of the battery pack are provided with differentiated heat exchange structures. The first group of channels and second group of channels are positioned to address local temperature variations in different battery cell rows, ensuring each region receives appropriate heat management tailored to its specific thermal characteristics
2Stability of the object's composition
If heat exchange spaces are added between battery cell rows, then temperature consistency is improved, but the volume of the battery pack increases
Solution Approach 1:
The heat exchange channels extend in the axial direction of the battery cells (vertical dimension) rather than only in the horizontal plane. This vertical arrangement allows heat exchange surfaces to surround multiple battery cells along the axial direction, achieving comprehensive temperature consistency while minimizing the horizontal space required
Solution Approach 2:
The heat exchange channels are positioned within the existing battery pack structure, with channels arranged to surround battery cells in a nested configuration. The first and second group of channels are integrated into the battery pack design space, utilizing available volume efficiently without requiring significant additional external volume
3Productivity
If heat insulation layers are added between channel groups, then heat exchange efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
Heat insulation layers are applied locally only where needed between the first group of channels and second group of channels, rather than throughout the entire structure. This selective insulation focuses thermal management resources on critical heat exchange interfaces, improving efficiency while minimizing additional manufacturing steps
Solution Approach 2:
The heat insulation structure is designed asymmetrically, with insulation layers positioned specifically between channel groups where temperature gradients are most pronounced. This asymmetric placement optimizes heat exchange efficiency by targeting areas of greatest thermal need rather than applying uniform insulation throughout
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 effectively maintains battery pack temperatures within a working range, enhancing operating efficiency and extending the service life of the battery pack.
Implementation Method 1
a heat conduction medium passage arranged in the heat exchanging spaces... the heat conduction medium in the first group of channels flowing from the inlets to the outlets of the channels thereof
Implementation Method 2
a heat conduction medium passage arranged in the heat exchanging spaces... the heat conduction medium in the second group of channels flowing from the inlets to the outlets of the channels thereof
Implementation Method 3
A heat insulation layer may also be arranged between the first group of channels and the second group of channels
Data Source
AI summary
A battery pack is provided including: a plurality of battery cells arranged in multiple battery cell rows; one or more heat exchange spaces; and a device for providing heat exchange to the battery pack. Further, the device includes a heat conduction medium passage arranged in the heat exchange spaces, such that the heat conduction medium passage surrounds multiple battery cells each battery cell row. The heat conduction medium passage is provided with at least a first group of channels and a second group of channels, which are in contact with the surface of each battery cell, and a heat conduction medium is provided in the first group of channels and the second of channels. The heat conduction medium flows in the first group of channels in a direction opposite from the flow of the heat conduction medium in the second group of channels.