Electric Drive Cooling Assembly for Uniform Coolant Flow
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Solution Overview
Problem
Existing cooling arrangements for electric drive components like batteries and fuel cells face challenges in achieving uniform mass flow of the cooling medium, leading to uneven cooling effectiveness across different areas.
Innovation Solution
The cooling arrangement is designed to equalize the flow velocity of the cooling medium by dimensioning the free cross sections of the inlet and outlet troughs, using diaphragms or apertures to ensure uniform flow speeds, particularly by varying the cross-sectional areas along the inlet branches and manifolds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the cooling arrangement uses extensively branched flow channels (inlet/outlet troughs, manifolds, tubes) to cool the electric drive component, then the cooling coverage is improved, but the mass flow uniformity deteriorates
Solution Approach 1:
The patent applies local quality by varying the free cross-sections of inlet troughs and outlet troughs at different locations within the cooling arrangement. Specifically, inlet troughs closer to the inlet opening have larger free cross-sections than those farther away, and outlet troughs are dimensioned to compensate for flow accumulation. This localized adjustment of geometric parameters ensures uniform flow velocity distribution across all parallel tube sections, resolving the mass flow uniformity issue while maintaining extensive cooling coverage.
2Manufacturing precision
If the free cross-sections of inlet troughs are made larger to increase flow capacity, then the flow velocity uniformity improves, but the structural complexity increases
Solution Approach 1:
The patent implements parameter changes by systematically varying the free cross-sectional dimensions of inlet and outlet troughs based on their position in the flow path. The inlet troughs have progressively smaller free cross-sections with increasing distance from the inlet opening, while outlet troughs are dimensioned to balance the flow distribution. These controlled parameter variations achieve flow velocity uniformity without requiring complex active control systems or additional components.
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 approach results in spatially uniform cooling conditions across the electric drive component, enhancing the effectiveness of the cooling process and maintaining the component's temperature within a permissible range.
Implementation Method 1
a cooling arrangement for an electric drive component, such as a battery or a fuel cell
Implementation Method 2
guiding a cooling medium... flow velocity of the cooling medium
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a cooling arrangement for an electric drive component, such as a battery or a fuel cell, for conveying a cooling medium, comprising a main inlet line (1) extending from an inlet opening (2), a main outlet line (3) opening into an outlet opening (4), and a generally cuboid-shaped tube arrangement (RA1, ...) arranged between the main inlet line (1) and the main outlet line (3), wherein at least one inlet branch (EZ1, ...) extends from the main inlet line (1) with at least two inlet troughs (ET11, ...) arranged one behind the other along the main inlet line (1), and the main outlet line (3) has at least one outlet branch (AZ1, ...) associated with the inlet branch (EZ1, ...) with at least two outlet troughs (AT11, ...), wherein each inlet trough (ET11, ...) is connected via an inlet manifold. (ES11, ...), several between the entrance assembly line (ES11, ...) and an outlet manifold (AS11, ...) associated with the inlet manifold (ES11, ...) and parallel sections of the tube arrangement (RA1, ...) and the associated outlet manifold (AS11, ...) is fluidically connected to an outlet trough (AT11, ...), wherein free cross-sections of the inlet troughs (ET11, ...) and/or the outlet troughs (AT11, ...) are dimensioned such that a homogenization of the flow velocity of the cooling medium results in the various sections of the tube arrangement (RA1, ...), as well as an electric drive device.