Battery Cell Spray Orifice Layout for Lower-Height Dielectric Cooling
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Solution Overview
Problem
Existing battery thermal management systems for electric vehicles face challenges with uneven cooling, high thermal resistance, and increased cost and weight due to the use of dielectric fluids, which also limit the number of cells that can be packed efficiently.
Innovation Solution
A battery design featuring a dielectric fluid circuit with spray orifices and ramps that are strategically positioned to minimize height and interference with electrical connectors, allowing for closer cell packing and effective cooling while reducing the amount of dielectric fluid used.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cells are immersed in dielectric fluid or dielectric fluid circuits are used for watering the cells, then cooling efficiency is improved, but the height of the battery increases and the number of cells that can be positioned in the battery for a given volume decreases
Solution Approach 1:
The spray orifices are positioned on the lateral sides of the battery module rather than on the top surface, transferring the cooling function from a vertical arrangement to a lateral arrangement. This dimensional change allows the cooling circuit to be integrated into the side walls of the battery housing, eliminating the need for additional vertical space and reducing battery height while maintaining effective cooling through direct spray contact with the cells.
2Temperature
If dielectric fluid circuits are positioned directly above the cells, then cooling coverage is improved, but interference with electrical connection connectors occurs
Solution Approach 1:
The cooling circuit is repositioned from a vertical location above the cells to a lateral location on the side walls of the battery module. This spatial relocation separates the cooling system from the electrical connection area, eliminating interference with connectors while maintaining comprehensive cooling coverage through lateral spray distribution across the cell surfaces.
3Temperature
If cells are spaced apart to allow passage of circuit elements, then cooling access is improved, but the number of cells per unit volume decreases
Solution Approach 1:
The cooling circuit is integrated directly into the lateral walls of the battery housing, merging the structural housing with the cooling function. This integration eliminates the need for separate circuit elements positioned between cells, allowing cells to be packed closely together while maintaining adequate cooling access through spray orifices positioned on the external side walls.
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 enhances cooling efficiency, reduces the battery's height, and maintains effective temperature regulation within a restricted range, thereby improving performance and lifespan while minimizing material usage and weight.
Implementation Method 1
said circuit comprising one or more spraying orifices for said cells
Implementation Method 2
dielectric fluid circuit, said circuit comprising one or more spraying orifices for said cells
Data Source
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AI summary
A battery comprising at least one row of energy storage cells (10), said row having a longitudinal extension direction, an upper side (12) and lateral sides (14) of the row being respectively defined by a series of upper (10a) and lateral (10b) faces of the cells (10) and spaces (11) separating said cells (10) in the longitudinal extension direction, the battery further comprising a dielectric fluid circuit (20), said circuit (20) comprising one or more spray orifices (22) of the cells (10), the one or more spray orifices (22) being flush with the upper side (12) of the row and/or being located facing at least one of the lateral sides (14) of the row so that the circuit (20) leaves the upper side (12) of the row free.