Dual-Channel Thermal Management for Low-Temperature EV Heating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Thermal management systems face challenges in efficiently meeting different heating requirements, particularly in low-temperature environments where components like batteries struggle to provide excess heat, affecting heating capacity and efficiency.
Innovation Solution
The system incorporates a dual-channel heat exchanger configuration with multiple modes (first and second heating modes) that allow selection of heat from either a heater or excess heat generated by components, ensuring effective heat transfer and maintaining component temperatures through a refrigerant and coolant flow path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heater is turned on to provide heat to the refrigerant flow path, then the heating capacity of the system is improved, but the system cannot quickly heat components like batteries when the operating temperature is low
Solution Approach 1:
The system dynamically switches between different heating modes (first heating mode using only heater, second heating mode using both heater and excess heat from first heat exchange component) based on real-time temperature conditions and heat availability, optimizing the heating process at different stages
Solution Approach 2:
The system performs preliminary heating of components like batteries using the heater before utilizing excess heat from these components for refrigerant heating, ensuring components reach operational temperature quickly and can then contribute to the heating process
2Temperature
If the heater is turned on simultaneously with excess heat from the first heat exchange component, then the heating capacity is enhanced, but the system complexity increases due to multiple heat sources and flow path configurations
Solution Approach 1:
The heat exchanger is divided into multiple independent channels (first channel and second channel) with distinct flow paths, allowing each channel to operate independently and simplifying the control of multiple heat sources by isolating their respective refrigerant and coolant flows
Solution Approach 2:
The first heat exchanger serves multiple functions: it acts as a heat exchanger in both heating modes, and additionally functions as a heat source in the second heating mode, eliminating the need for separate components and reducing overall system complexity
3Reliability
If the heater is used for preheating components when operating temperature is low, then components can reach normal operating temperature, but the heating speed is reduced due to heat being diverted from the refrigerant flow path
Solution Approach 1:
The system implements periodic heating stages: first heating stage uses the heater exclusively to quickly warm components and refrigerant, then transitions to a second heating stage where both heater and preheated components work together, creating an optimized periodic heating cycle
Solution Approach 2:
The system maintains continuous useful action by seamlessly transitioning between heating modes, ensuring the heater continuously contributes to heating while progressively incorporating excess heat from components as they reach operational temperature, maximizing heating efficiency throughout the process
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 heating capacity, maintains component operating temperatures, and optimizes energy use by selectively utilizing heater heating and excess heat, improving system efficiency and battery life in electric vehicles.
Implementation Method 1
the heater heats a coolant
Implementation Method 2
the coolant absorbs heat from the first heat exchange component
Implementation Method 3
a refrigerant in the fourth heat exchange portion absorbs heat of the coolant in the third heat exchange portion
Implementation Method 4
the refrigerant flow path including a compressor
Implementation Method 5
the second flow regulating device throttles the refrigerant flow path
Data Source
AI summary
A thermal management system includes a refrigerant flow path, a coolant liquid flow path, a first heat exchanger and a second heat exchanger. The refrigerant flow path includes a compressor, a first indoor heat exchanger, a first flow regulation device, and a second flow regulation device. The coolant liquid flow path includes a first heat exchange assembly and a heater. The first heat exchanger includes a first heat exchange portion and a second heat exchange portion. The second heat exchanger includes a third heat exchange portion and a fourth heat exchange portion. The thermal management system has a first heating mode and a second heating mode. The thermal management system provides thermal energy required for heating by at least one of the following selectable processes: heating of the heater, and generating excess heat during operation of the first heat exchange assembly.