Intelligent Multiple-Loop EV Cooling System
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Solution Overview
Problem
Current electric vehicle cooling systems are inefficient, relying heavily on air conditioning and adding wind resistance, which reduces mileage range and energy efficiency, and lack effective control over temperature balancing between battery cells.
Innovation Solution
An intelligent multiple-loop cooling system with internal cooling pipelines for the battery pack and electric drive module, featuring multiple loops connected by electric pumps, pass-through valves, three-way valves, and a heat exchanger, allowing for dynamic temperature balancing, cooling, and heating based on temperature sensors and vehicle controller adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air conditioning cooling is used for battery pack cooling, then cooling effect is achieved, but mileage range is reduced
Solution Approach 1:
The cooling system is divided into multiple independent loops (battery cooling loop, motor cooling loop, cabin cooling loop) that can operate independently or in combination. Each loop has its own cooling paths and control mechanisms, allowing targeted cooling without unnecessarily engaging the air conditioning system for battery cooling when other cooling paths are available.
Solution Approach 2:
The cooling system uses a multi-functional design where a single coolant circulation system serves multiple purposes: battery pack cooling, motor cooling, and cabin air conditioning. The system can dynamically allocate cooling capacity to different components based on their thermal needs, reducing reliance on air conditioning for battery cooling and thereby preserving mileage range.
2Temperature
If battery radiator is disposed in front of condenser for cooling, then battery cooling is achieved, but front-end module efficiency is reduced
Solution Approach 1:
The system transitions from a single-dimensional sequential arrangement (battery radiator in front of condenser) to a multi-dimensional parallel architecture with multiple independent cooling loops. This allows coolant to flow through different paths simultaneously, enabling battery cooling without blocking airflow to the condenser and maintaining front-end module efficiency.
3Device complexity
If battery pack and electric drive module share cooling system, then system integration is improved, but control precision is reduced
Solution Approach 1:
While maintaining physical integration of the cooling system, the patent segments the control functions into independent control loops for the battery pack and electric drive module. Each loop has its own temperature sensors, control valves, and pumping mechanisms, allowing precise independent temperature control despite shared infrastructure.
Solution Approach 2:
The system employs dynamic control mechanisms with multiple three-way valves and electric pumps that can adjust coolant flow distribution in real-time based on the thermal needs of different components. This dynamic allocation allows the integrated system to provide precise temperature control tailored to each component's requirements.
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 system enhances energy efficiency, reduces temperature differences within the battery pack, extends mileage range, and optimizes cooling and heating operations independently for the battery pack and electric drive module, improving overall vehicle performance.
Implementation Method 1
a heat exchanger connected to an external air conditioning cooling component
Implementation Method 2
a positive temperature coefficient (PTC) heater
Implementation Method 3
The cooling system is provided with two electric pumps
Data Source
AI summary
An intelligent multiple-loop electric vehicle cooling system includes a battery pack, an electric drive module, a battery radiator, an electric drive module radiator, electric pumps, pass-through valves, three-way valves, a PTC heater, a heat exchanger. The cooling system is provided with two electric pumps, two pass-through valves, and three three-way valves that are connected through pipelines to form multiple loops. Compared with the prior art, by means of the present invention, multiple three-way valves and pass-through valves are disposed, to connect pipelines to form loops meeting different cooling or heating requirements. These loops are selectively opened or closed according to features and working states of a battery pack and an electric drive module of an electric vehicle, to ensure temperature balance of the electric vehicle and efficient operation of the electric vehicle.