EV Thermal Management Loops for Independent Coolant Temperature Control
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Solution Overview
Problem
Current thermal management systems for electric vehicles connect multiple thermal management objects in series, leading to uncontrollable coolant temperatures and inadequate temperature control for secondary thermal management objects.
Innovation Solution
A thermal management system that connects different thermal management objects in parallel using independent coolant circulation loops, controlled by three-way valves to separately adjust temperatures of each object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If thermal management objects are connected in series, then the system structure is simple, but the temperature control precision deteriorates
Solution Approach 1:
The patent divides the thermal management system into multiple independent parallel circulation loops, each serving a specific thermal management object (battery pack, HVAC system, motor). This segmentation allows each loop to independently control coolant flow and temperature for its designated object, resolving the temperature control precision issue while maintaining reasonable system structure through modular design.
Solution Approach 2:
The patent introduces dynamic flow control valves in each parallel circulation loop to adjust coolant flow rates based on real-time temperature requirements of different thermal management objects. This dynamic adjustment capability enables precise temperature control for each object independently, while the system structure remains adaptable to varying operational conditions.
2Ease of operation
If thermal management objects are connected in series, then the system is easy to operate, but the temperature control adaptability deteriorates
Solution Approach 1:
By segmenting the thermal management system into independent parallel loops with individual flow control valves, each loop can be operated independently to meet different temperature requirements of various thermal management objects, thereby improving adaptability while maintaining ease of operation through modular control.
Solution Approach 2:
The parallel circulation loop structure provides universal adaptability to handle multiple thermal management objects simultaneously with different temperature requirements. The system can flexibly allocate coolant flow to different objects based on their needs, making it versatile for various operating conditions while maintaining straightforward operation through standardized valve control.
3Device complexity
If a single coolant circulation loop is used, then the system complexity is low, but the temperature control precision for multiple objects deteriorates
Solution Approach 1:
The patent segments the single coolant circulation loop into multiple independent parallel loops, each with its own flow control valve. This allows precise temperature control for multiple thermal management objects by independently adjusting coolant flow in each loop, while the overall system complexity remains manageable through modular architecture.
Solution Approach 2:
By introducing dynamic flow control valves in each parallel circulation loop, the system can precisely adjust coolant flow rates to meet the specific temperature requirements of different thermal management objects. This dynamic control capability achieves high temperature control precision without excessive system complexity.
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 solution allows for precise temperature control of multiple thermal management objects, meeting their unique temperature requirements and improving overall thermal management efficiency.
Implementation Method 1
The indirect heat exchange refers to a heat exchange manner in which heat exchange media do not come into direct contact with each other... A temperature of a coolant is adjusted by using a refrigeration cycle system, and then the coolant with the temperature adjusted is conveyed to the battery through a pipe, to adjust a temperature of the battery
Data Source
AI summary
Disclosed are a thermal management system and a new energy vehicle. The new energy vehicle includes an electric motor and a thermal management system. The thermal management system includes a refrigeration cycle system, a flow path pump, a first thermal management object, a second thermal management object, and a plurality of three-way valves. The refrigeration cycle system and the flow path pump are separately connected to the plurality of three-way valves. The refrigeration cycle system and the flow path pump are connected to the first thermal management object and the second thermal management object through the plurality of three-way valves respectively. The plurality of three-way valves are separately controlled, to form a first coolant circulation loop and a second coolant circulation loop that are independent of each other, and separately control temperatures of the first thermal management object and the second thermal management object.