Alternating High Low Voltage Cell Module Thermal Homogenization
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Solution Overview
Problem
Existing electrical energy storage devices in hybrid vehicles experience temperature heterogeneity between high and low voltage modules, leading to reduced performance and lifetime due to inefficient heat diffusion.
Innovation Solution
A module of elementary cells is arranged with alternating sets of high and low voltage cells, connected through specific groups of connection elements to facilitate even heat distribution and voltage delivery, with positive and negative contacts positioned to enhance thermal homogenization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If high voltage and low voltage cells are grouped separately in different parts of the energy storage device, then the electrical connection and module structure are simplified, but temperature heterogeneity occurs leading to reduced performance and lifetime
Solution Approach 1:
The energy storage device is segmented into multiple modules, with each module containing a mixed arrangement of high voltage and low voltage cells. This segmentation allows thermal management to be applied at the module level, improving heat distribution while maintaining structural organization.
Solution Approach 2:
Different regions of the energy storage device are designed with different cell voltage characteristics. High voltage cells and low voltage cells are alternately arranged to create local thermal zones that facilitate heat diffusion from high-voltage to low-voltage regions, achieving thermal homogenization through spatial distribution.
2Ease of manufacture
If high voltage and low voltage cells are arranged in separate parts, then manufacturing and assembly are easier, but heat diffusion becomes inefficient causing temperature heterogeneity
Solution Approach 1:
High voltage cells and low voltage cells are merged into a single modular structure with alternating arrangement. This combination maintains the ease of modular assembly while enabling efficient thermal interaction between different voltage zones through their close physical proximity.
Solution Approach 2:
Low voltage cells act as thermal intermediaries between high voltage cell groups. The alternating arrangement allows low voltage cells to receive heat from high voltage cells and dissipate it to the cooling system, facilitating heat diffusion and temperature homogenization across the entire module.
3Temperature
If cells are arranged in alternating succession of high and low voltage cells, then thermal homogenization is improved, but the device complexity increases
Solution Approach 1:
The complex alternating arrangement is achieved through modular segmentation, where each module contains a standardized pattern of high and low voltage cells. This segmentation reduces the overall complexity by repeating a manageable unit rather than designing a unique complex configuration for the entire device.
Solution Approach 2:
The alternating cell arrangement serves multiple functions simultaneously: electrical connection, thermal management, and structural support. This multi-functionality reduces the need for separate dedicated components, thereby reducing overall device complexity despite the sophisticated cell arrangement.
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 configuration ensures improved thermal homogenization and performance by diffusing heat evenly across the module, thereby extending the lifespan and efficiency of the energy storage device.
Implementation Method 1
This configuration ensures improved thermal homogenization and performance by diffusing heat evenly across the module
Data Source
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AI summary
The invention relates to a module (5) of primary cells (8a, 9a, 9b, 8b) for storing electrical energy, comprising a first assembly of primary cells interconnected in such a way as to supply a first voltage in a first voltage range and a second assembly of primary cells interconnected so as to supply a second voltage in a second voltage range, said at least one primary cell (8b) of the second assembly being arranged between two primary cells (8a, 9a, 9b) of the first assembly.