Vehicle Thermal Circuit Switching for Stable Chiller Temperature
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Solution Overview
Problem
The switching between circuit modes in thermal management systems can cause significant changes in heating temperature, leading to deterioration of air conditioning comfort in vehicles.
Innovation Solution
A thermal management system with a control device that adjusts threshold temperatures based on battery and chiller temperature differences to minimize rapid changes in chiller temperature during mode switching, using a battery temperature sensor, chiller temperature sensor, and a switching device to manage circuit modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the circuit mode is switched between first circuit mode and second circuit mode, then the thermal management system can adapt to different temperature conditions, but the heating temperature changes significantly causing deterioration of air conditioning comfort
Solution Approach 1:
The control device predicts the chiller temperature change amount before switching circuit modes. Based on this prediction, it adjusts the threshold temperature in advance to prevent significant heating temperature changes during mode switching, thereby maintaining air conditioning comfort while adapting to different temperature conditions.
Solution Approach 2:
The threshold temperature is dynamically adjusted based on the predicted chiller temperature change amount. When the predicted change exceeds a reference amount, the threshold temperature is modified to compensate for the expected temperature fluctuation, thus stabilizing the heating temperature during circuit mode transitions.
2Stability of the object's composition
If the threshold temperature is adjusted dynamically, then the chiller temperature change can be minimized during mode switching, but the control system becomes more complex
Solution Approach 1:
The control device uses temperature sensors to detect battery temperature and chiller temperature, predicts the chiller temperature change amount based on these readings, and adjusts the threshold temperature accordingly. This feedback mechanism enables automatic adaptation while keeping the control logic relatively simple through standardized prediction and adjustment rules.
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 reduces rapid changes in heating temperature, ensuring consistent air conditioning comfort by optimizing threshold temperatures to match expected changes in chiller temperature.
Implementation Method 1
a chiller configured to exchange heat between the heat medium and the refrigerant
Implementation Method 2
a heat exchanger (such as a radiator) through which the heat medium flows
Data Source
AI summary
A switching device of a thermal management system is configured to switch a thermal management circuit to a first circuit mode or a second circuit mode based on the relationship between a battery temperature and a threshold temperature. When a predetermined condition that the amount of change in chiller temperature associated with switching of the circuit mode of the thermal management circuit is expected to be larger than a reference amount is satisfied before the switching of the circuit mode, the control device adjusts the threshold temperature so that the amount of change in chiller temperature becomes smaller than the reference amount.