Electric Drive Thermal Control for Component Power Bottlenecks
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Solution Overview
Problem
Existing electric drive systems for motor vehicles often fail to deliver maximum power due to inadequate temperature control of components like electrical energy storage systems, power electronics, and electrical machines, leading to reduced performance in certain operating conditions.
Innovation Solution
An electric drive system with an optimization module that performs performance-optimized relative temperature control by determining the lowest temperature-dependent power among components and prioritizing its enhancement, using separate temperature control devices and tempering mediums to maximize system power output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If coolers are arranged exclusively interacting with electrical energy storage systems or in series with other drive system components, then the temperature control structure is simplified, but the power output of the drive system is reduced due to insufficient temperature control of certain components
Solution Approach 1:
The patent divides the temperature control system into separate control units for different drive system components. Each component (electrical energy storage system, power electronics, electrical machine) has its own temperature control device that can independently regulate its temperature, allowing optimized performance of each component without being constrained by series-connected cooling limitations.
2Power
If separate temperature control devices are provided for each drive system component, then the power output of the drive system is maximized, but the device complexity increases
Solution Approach 1:
The patent implements a dynamic temperature control strategy where the control unit continuously monitors the temperatures of all drive system components and dynamically adjusts the operation of temperature control devices based on real-time conditions. This allows the system to adapt to changing operating conditions and optimize power output without requiring overly complex static control structures.
Solution Approach 2:
The system incorporates temperature sensors and control units that continuously monitor the temperature of each drive system component and provide feedback to adjust the operation of temperature control devices. This feedback mechanism enables automatic optimization of component temperatures to maximize power output while managing system complexity through intelligent control algorithms.
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 maximizes the power output of the electric drive system by ensuring that the component with the lowest temperature-dependent power is optimized, thereby enhancing the overall efficiency and performance of the motor vehicle.
Implementation Method 1
Performance-optimized relative temperature control is to be understood, in particular, as temperature control that takes into account which of the components that are part of the optimization module can currently deliver the lowest temperature-dependent power
Data Source
AI summary
An electric drive system of a motor vehicle and method for controlling the temperature of components of such an electric drive system, of a motor vehicle which has at least an electrical energy storage system, at least one power electronics unit, and at least one electrical machine for driving at least one drive wheel of the motor vehicle. The electrical energy storage system, the power electronics and the electrical machine each constitute a drive system component of the drive system and are functionally coupled with each other. At least two of the drive system components are part of an optimization module, which is designed to perform a performance-optimized relative temperature control of the drive system components. The invention also relates to a method of controlling the temperature of drive system components of such an electric drive system.