Battery Module Thermal Layout With Peltier-Coupled Separator Plates
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Solution Overview
Problem
Existing battery modules in electric cars face a contradiction between minimizing space and effective thermal management, as tight cell stacking for space efficiency hampers heat transfer, while adequate heat transfer requires additional space for channels.
Innovation Solution
A thermo-stabilized module design using flat battery cells within a housing, where thermally conductive separating plates maintain contact with the side wall and a Peltier cell, and a liquid heat exchanger, facilitated by a positioning frame and fastening plate, enhances heat transfer without increasing module size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If cells are stacked up very tightly to minimize space, then space efficiency is improved, but heat transfer capability deteriorates
Solution Approach 1:
Thermally conductive separating plates are introduced as intermediary elements between battery cells. These plates serve dual functions: they maintain tight cell stacking to minimize module volume while simultaneously providing efficient thermal conduction pathways to remove heat from the cells, thus resolving the contradiction between space efficiency and heat transfer capability.
2Temperature
If thermally conductive separating plates are added to improve heat transfer, then heat transfer capability is improved, but device complexity increases
Solution Approach 1:
The separating plates are designed to perform multiple functions simultaneously: they provide thermal conduction for heat removal, act as structural spacers to maintain cell positioning, and serve as mounting surfaces for the Peltier cell. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving improved heat transfer.
3Manufacturing precision
If Peltier cell is integrated for active thermal management, then temperature control precision is improved, but manufacturing complexity increases
Solution Approach 1:
The Peltier cell is merged with the separating plates and housing structure through direct thermal contact and mechanical fastening. This integration combines multiple components into a unified assembly that achieves precise temperature control while simplifying the manufacturing process by reducing the number of separate assembly steps and ensuring reliable thermal coupling.
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 allows for efficient thermal management of flat battery cells, minimizing space while ensuring effective heat transfer and easy assembly, thereby maintaining optimal operating parameters and extending cell lifespan.
Implementation Method 1
a Peltier cell which, depending on actual thermal conditions, transfers heat into or out of a battery
Implementation Method 2
thermally conductive separating plates which remain in contact with at least one side wall of the housing are placed inside the housing with the flat battery cells placed between said separating plates
Implementation Method 3
the Peltier cell remains in thermal contact with a liquid heat exchanger, said exchanger preferably having a radiator as well as a cooling fluid collector having outlet and inlet openings
Data Source
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AI summary
Electric cells (6) placed inside a housing (1) are in thermal contact with a Peltier cell providing heat transfer into or out of a cell pack, whereas thermo-conducting separating plates (5) contacting with at least one side wall (2) are placed inside said housing with the electric cells (6) placed between the plates (5), and the side wall (2) of the housing (1) being in contact with said separating plates (5) is in thermal contact with said Peltier cell (8).