Electric Vehicle Cooling System with Dual Pump Segmentation
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Solution Overview
Problem
Electrically powered motor vehicles require an efficient cooling system that can manage varying phases of use, including driving, charging, and potential pump failures, to prevent overheating and ensure the longevity of components like the electric motor and charger.
Innovation Solution
A cooling system with a central unit, multiple pumps, a solenoid valve, and a radiator, utilizing Pulse Width Modulation (PWM) control signals and temperature sensors to adjust cooling fluid flow rates and strategies, ensuring effective cooling across all operational states, including pump failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single pump is used in the cooling circuit, then the device complexity is reduced, but the reliability deteriorates when the pump fails or operates in defective mode
Solution Approach 1:
The cooling system is divided into multiple independent pumping units (first pump for driving mode, second pump for charging mode) that can operate independently. This segmentation allows the system to maintain cooling functionality even when one pump fails, as the other pump can continue to operate and provide cooling to the necessary components.
Solution Approach 2:
The system changes operational parameters by switching between different pump configurations based on vehicle mode (driving vs. charging). The central computing unit adjusts pump operation parameters including flow rates, activation states, and coordination between pumps to optimize reliability for each specific operational context.
2Reliability
If multiple pumps are added to the cooling circuit, then the reliability is improved, but the device complexity increases
Solution Approach 1:
Each pump is designed with multi-functionality to handle different cooling requirements. The first pump primarily serves driving mode but can contribute to charging mode cooling, while the second pump primarily serves charging mode but can support driving mode. This universal design reduces the need for completely separate pumping systems for each mode, thereby limiting complexity increase while maintaining reliability.
Solution Approach 2:
The system implements dynamic pump coordination where the central computing unit continuously monitors operational mode and adjusts pump operations in real-time. During driving mode, the first pump operates at higher flow rates while the second pump may operate at reduced capacity or standby. During charging mode, the roles reverse or both pumps coordinate to provide appropriate cooling, optimizing system response without requiring fixed complex configurations.
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
The system provides reliable and flexible cooling, minimizing the risk of overheating and extending the lifespan of critical vehicle components by adapting to different operational modes and pump states, ensuring efficient performance and safety during all vehicle phases.
Implementation Method 1
at least one pump for circulation of a cooling fluid
Implementation Method 2
a radiator, said circuit being intended to cool a battery charger and an electric motor
Data Source
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AI summary
The invention relates to a cooling system (1) for an electrically driven motor vehicle, comprising a central unit (3) and a cooling circuit (2) comprising at least a pump (4, 5) for the circulation of a coolant fluid, a solenoid valve (7), and a radiator (10), said circuit (2) being intended for cooling a battery charger (6) and an electrical motor (8) connected to an electronic control device (9). The main characteristic of a cooling system according to the invention is that the central computing unit (3) is configured to manage the activation of each pump (4, 5), including the potential faults of each of said pumps (4, 5).