EV Thermal Management Valve Assembly for Battery and Drive Train
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current thermal management systems for electric vehicles fail to efficiently control the temperature of battery packs, drive trains, and passenger cabins while maintaining overall vehicle operating efficiency, as they often require complex configurations and dual coolant loops that are not optimized for simultaneous heating and cooling.
Innovation Solution
A thermal management system utilizing three separate thermal control circuits – passenger cabin, battery, and drive train loops – with a refrigerant-based system that operates in parallel or series modes, allowing for independent or coupled operations to optimize temperature control across vehicle subsystems, using a valve assembly and refrigerant-based heat exchangers to manage heat transfer fluid and refrigerant flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple cooling loops and heat exchangers are used to control battery and drive train temperatures, then temperature control capability is improved, but system complexity increases
Solution Approach 1:
The single heat exchanger serves multiple functions by handling both battery cooling and drive train cooling through a dual-mode valve system. In first mode, the heat exchanger cools the battery pack; in second mode, it cools the drive train components. This multi-functional design eliminates the need for separate heat exchangers for each subsystem, reducing overall system complexity while maintaining comprehensive temperature control capability.
Solution Approach 2:
The thermal management system employs a dual-mode valve system that dynamically switches between two operational configurations. The valve assembly can reconfigure the coolant flow paths to adapt to different thermal management needs - connecting the battery to the heat exchanger in first mode, and connecting the drive train to the heat exchanger in second mode. This dynamic reconfiguration allows a single heat exchanger to serve multiple thermal control functions.
2Adaptability or versatility
If dual mode valve system is used to switch between parallel and series cooling loops, then thermal management flexibility is improved, but device complexity increases
Solution Approach 1:
The dual-mode valve system dynamically reconfigures thermal management architecture based on operational requirements. The valve assembly switches between parallel configuration (where battery and drive train cooling loops operate independently) and series configuration (where cooling loops are connected in sequence). This dynamic topological transformation provides thermal management flexibility while using a unified valve mechanism rather than multiple independent control systems.
Solution Approach 2:
The thermal management system is segmented into distinct operational modes controlled by the dual-mode valve. The valve divides the thermal management functionality into two separable configurations: parallel mode for independent subsystem cooling and series mode for coupled cooling. This segmentation allows the system to optimize performance for different operational scenarios while maintaining a relatively simple valve-based control architecture.
3Ease of operation
If three separate thermal control circuits are used for passenger cabin, battery, and drive train, then independent temperature control is improved, but system complexity increases
Solution Approach 1:
The thermal management system uses a universal heat exchanger that can serve multiple thermal control circuits including battery cooling, drive train cooling, and passenger cabin climate control. The single heat exchanger replaces what would traditionally require multiple dedicated heat exchangers, reducing component count and system complexity while maintaining the ability to independently control temperatures of different subsystems through selective coolant routing.
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 enables efficient temperature regulation of battery packs, drive trains, and passenger cabins, optimizing overall vehicle efficiency by allowing for independent or coupled operations of thermal control loops, thereby enhancing performance, range, and cost-effectiveness.
Implementation Method 1
a refrigerant-fluid heat exchanger coupled to the battery thermal control loop, where the refrigerant valve in a first mode directs the refrigerant through the refrigerant-air heat exchanger and the first expansion valve, and where the refrigerant valve in a second mode directs the refrigerant through the refrigerant-fluid heat exchanger which, in turn, heats the second heat transfer fluid within the battery thermal control loop
Data Source
AI summary
A multi-mode vehicle thermal management system is provided that allows efficient thermal communication between a refrigerant-based thermal control loop and three non-refrigerant-based thermal control loops, where one of the non-refrigerant-based loops provides temperature control over the vehicle's passenger cabin, a second of the non-refrigerant-based control loops is thermally coupled to the vehicle's battery system and the third of the non-refrigerant-based control circuits is thermally coupled to the vehicle's drive train. The refrigerant-based control loop may be operated either in a heating mode or a cooling mode and is coupled to the vehicle's HVAC system using a refrigerant-air heat exchanger, and to the battery thermal control loop using refrigerant-fluid heat exchangers. A valve assembly is used to couple and/or decouple the battery and drive train thermal control loops, thereby allowing these two thermal control loops to operate either in parallel or in series.