Electric Vehicle Cooling Control via Dynamic Fan and Pump Speed Adjustment
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Solution Overview
Problem
Existing cooling systems for electric vehicles consume excessive power due to overcooling, which is not effectively addressed by current technologies that control the speed of fans and electronic water pumps.
Innovation Solution
A system and method that automatically control the speed of the radiator fan and electronic water pump by calculating the required cooling water flow rate and air flow rate using temperature sensors and wind velocity sensors to optimize cooling efficiency and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the cooling fan and electronic water pump operate at high speed continuously, then cooling performance is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the cooling fan speed and electronic water pump speed variable rather than fixed. The control unit dynamically adjusts the rotation speeds of both the cooling fan and electronic water pump based on real-time temperature sensor readings from the power conversion component. This allows the system to operate at high speed when cooling is needed and reduce speed when cooling demand decreases, thereby improving cooling performance when required while reducing power consumption during normal operation.
Solution Approach 2:
The patent implements feedback control by using temperature sensors to continuously monitor the temperature of the power conversion component and feeding this information back to the control unit. The control unit processes this temperature feedback and automatically adjusts the cooling fan speed and water pump speed accordingly. This closed-loop feedback mechanism ensures optimal cooling performance is maintained while minimizing power consumption by avoiding unnecessary high-speed operation.
2Reliability
If the cooling system operates continuously at maximum capacity, then cooling reliability is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the cooling capacity based on actual cooling demands. The control unit varies the rotation speed of the cooling fan and the driving speed of the electronic water pump according to temperature sensor readings, allowing the system to maintain reliable cooling when needed while reducing power consumption during periods of lower thermal load.
Solution Approach 2:
The patent changes the operational parameters of the cooling system by adjusting the rotation speed of the cooling fan and the driving speed of the electronic water pump based on temperature conditions. This parameter adjustment allows the system to maintain cooling reliability when temperatures require maximum cooling while consuming less power when cooling demands are lower, thus resolving the contradiction between reliability and power consumption.
3Use of energy by moving object
If the cooling system precisely controls fan speed and water pump speed based on temperature, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The control unit serves multiple functions: it controls the cooling fan speed, controls the electronic water pump speed, receives temperature sensor inputs, and processes control logic. By making the control unit multi-functional, the patent reduces the need for separate dedicated controllers for each component, thereby reducing overall device complexity while still enabling precise control of fan and pump speeds based on temperature readings to minimize power consumption.
Solution Approach 2:
The patent merges the control functions for the cooling fan and electronic water pump into a single control unit. This consolidation combines multiple control functions into one device, reducing the overall complexity of the control system while maintaining the capability to precisely adjust both fan speed and water pump speed based on temperature sensor feedback, thus achieving power savings without proportionally increasing 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 approach enhances cooling efficiency, reduces power consumption, and extends the lifespan of power conversion components by preventing overcooling in electric vehicles.
Implementation Method 1
a temperature sensor configured to sense a temperature of air in the air conditioning unit
Implementation Method 2
a cooling water temperature sensor configured to sense a temperature of cooling water flowing in the cooling unit
Implementation Method 3
a radiator, an electronic water pump, and a cooling unit cooling the power conversion component
Implementation Method 4
an electronic water pump
Data Source
AI summary
A system for cooling a vehicle including a power conversion component, a motor, a radiator, an electronic water pump, and a cooling unit cooling the power conversion component includes: an air conditioning unit configured to interlock with the cooling unit to perform air conditioning of the vehicle; a temperature sensor configured to sense a temperature of air in the air conditioning unit; a cooling water temperature sensor configured to sense a temperature of cooling water flowing in the cooling unit; and a cooling control controller configured to calculate a targeted air flow rate and a targeted cooling water flow rate to control the cooling of the cooling unit.