EV Heat Management Channel Isolation for Battery Self-Heating
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Solution Overview
Problem
Existing heat management systems in electrified vehicles fail to effectively utilize and efficiently distribute heat generated from drive units, leading to suboptimal performance and charging efficiency.
Innovation Solution
A heat management system that isolates and independently controls heat exchange channels between the electrical storage device, drive unit, radiator, and chiller device, allowing for efficient self-heating of the electrical storage device and effective use of heat generated from the drive unit, using a switching unit and temperature sensors to manage heat distribution based on temperature thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the electrical storage device is heated by passing current through it, then the temperature of the electrical storage device increases, but heat generated by the drive unit cannot be effectively utilized
Solution Approach 1:
The heat management system divides the thermal management into separate independent channels: a first channel for the electrical storage device and a second channel for the drive unit. This segmentation allows independent temperature control and heat utilization strategies for each component, enabling the system to heat the electrical storage device while separately managing and utilizing heat from the drive unit through heat exchange mechanisms.
Solution Approach 2:
The system merges the heat management functions by introducing heat exchange channels that allow thermal energy transfer between the electrical storage device and drive unit. The heat exchange mechanism enables the electrical storage device to utilize heat generated by the drive unit, transforming waste heat into a useful resource for maintaining optimal operating temperature of the electrical storage device.
2Temperature
If the radiator and chiller device are connected to the heating circuit, then heat removal capability is available, but heat generated by self-heating is removed instead of accumulated
Solution Approach 1:
The switching unit dynamically configures the heat management system based on operational requirements. When self-heating is active, the switching unit isolates the radiator and chiller device from the heating circuit, preventing heat removal. When cooling is required, the switching unit connects these components to the circuit. This dynamic reconfiguration ensures that heat generated by self-heating is accumulated and retained rather than being removed by cooling components.
Solution Approach 2:
The system uses the heat generated by self-heating of the electrical storage device to serve the thermal needs of the drive unit through the heat exchange channel. The drive unit utilizes this heat for its thermal management requirements, creating a self-sufficient heat utilization system where waste heat from one component becomes a resource for another, eliminating the need for external heating or cooling intervention.
3Device complexity
If a single integrated heat management system is used, then system complexity is reduced, but heat distribution efficiency decreases
Solution Approach 1:
The heat management system is segmented into multiple independent channels (first channel for electrical storage device, second channel for drive unit) with dedicated heat exchange mechanisms. This segmentation enables precise control over heat distribution pathways, allowing the system to efficiently direct heat to where it is needed most while maintaining a relatively simple overall structure through modular design.
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 enhances drive performance at startup, improves charging efficiency, and reduces external heating demands by optimizing heat utilization within the vehicle.
Implementation Method 1
an electrical storage device configured to exchange heat with the heat medium in the first channel
Implementation Method 2
a first channel, a second channel, a third channel, and a fourth channel configured such that a heat medium is allowed to flow through the first channel, the second channel, the third channel, and the fourth channel
Implementation Method 3
a drive unit configured to exchange heat with the heat medium in the second channel
Implementation Method 4
a heat medium is allowed to flow through the first channel, the second channel, the third channel, and the fourth channel
Implementation Method 5
a radiator provided in the third channel
Implementation Method 6
a radiator provided in the third channel
Implementation Method 7
a chiller device provided in the fourth channel
Implementation Method 8
a switching unit configured to be capable of switching a connection status among the first channel, the second channel, the third channel, and the fourth channel
Implementation Method 9
When the electrical storage device is heated by passing current through the electrical storage device
Data Source
AI summary
A heat management system includes an electrical storage device configured to exchange heat with a first channel, a drive unit configured to exchange heat with a second channel, a radiator in a third channel, a chiller device in a fourth channel, and a switching unit. In the heat management system, when the electrical storage device is heated, the switching unit is controlled such that the electrical storage device, the drive unit, the radiator, and the chiller device are isolated and independent of one another.