Vehicle Thermal Management Control for Battery Cooling Balance
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Solution Overview
Problem
Existing vehicle thermal management systems face challenges in simultaneously optimizing the cooling of batteries and passenger compartments, leading to reduced cooling efficiency when outdoor air fraction (OAF) is increased to cool the battery, thereby affecting the HVAC system's performance.
Innovation Solution
A method for controlling a vehicle thermal management system that dynamically adjusts the outdoor air fraction (OAF) based on battery temperature, cooling load, and vehicle conditions to enhance both battery cooling and HVAC performance by varying the OAF according to specific temperature ranges and correction values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the outdoor air fraction (OAF) is increased to cool the battery, then the battery cooling performance is improved, but the HVAC system's cooling efficiency is reduced
Solution Approach 1:
The patent implements dynamic adjustment of the outdoor air fraction (OAF) based on real-time battery temperature and HVAC cooling load conditions. The control method varies OAF dynamically rather than maintaining a fixed value, allowing the system to adapt to changing thermal requirements of both the battery and passenger compartment, thereby resolving the contradiction between battery cooling and HVAC efficiency.
Solution Approach 2:
The control method changes the OAF parameter according to specific temperature ranges and correction values. By adjusting this key parameter based on battery temperature thresholds and HVAC load conditions, the system optimizes the balance between battery cooling performance and HVAC cooling efficiency, preventing either system from being consistently compromised.
2Temperature
If the outdoor air fraction (OAF) is increased to cool the battery, then the battery cooling performance is improved, but the overall thermal management performance is reduced
Solution Approach 1:
The control method incorporates feedback mechanisms that continuously monitor battery temperature, HVAC cooling load, and other thermal parameters. Based on this feedback, the system adjusts the OAF to maintain optimal thermal management performance while ensuring adequate battery cooling, thereby preventing the degradation of overall system reliability.
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 optimizes cooling performance by maintaining satisfactory HVAC system efficiency while ensuring effective battery cooling, thereby preventing battery overheating and improving overall thermal management.
Implementation Method 1
the small-capacity battery may be cooled by the indoor air of the passenger compartment
Implementation Method 2
a heating, ventilation, and air conditioning (HVAC) system configured to heat or cool the air in the passenger compartment
Data Source
AI summary
A method for controlling a vehicle thermal management system includes determining an outdoor air fraction (OAF) based on a temperature of a battery when the outdoor air intake into a passenger compartment is required, wherein the OAF increases as the temperature of the battery increases, and the OAF decreases as the temperature of the battery decreases.