Vehicle refrigeration control method, apparatus, device, medium and program product
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Solution Overview
Problem
New energy vehicles face challenges in simultaneously and effectively cooling both batteries and passenger compartments due to limited refrigeration capacity, leading to potential safety hazards and comfort issues.
Innovation Solution
A vehicle refrigeration control method that monitors battery temperature and change rate in real time, determines refrigeration requirements, and allocates refrigeration performance through single-mode and dual-mode phases, prioritizing comfort and safety by adjusting compressor and electronic expansion valve controls to optimize refrigeration capacity allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the refrigeration system prioritizes cooling the passenger compartment, then passenger comfort is improved, but battery temperature control deteriorates leading to safety hazards
Solution Approach 1:
The system dynamically switches between single-mode phase (prioritizing passenger compartment cooling) and dual-mode phase (simultaneous cooling of both passenger compartment and battery) based on real-time temperature monitoring and refrigeration requirement assessment, allowing flexible adaptation to changing thermal conditions
Solution Approach 2:
The control system adjusts refrigeration parameters including compressor output, electronic expansion valve opening degrees, and refrigerant flow distribution based on battery temperature and change rate, enabling optimization of refrigeration capacity allocation between passenger compartment and battery
2Reliability
If the refrigeration system prioritizes cooling the battery, then battery safety is improved, but passenger compartment comfort deteriorates
Solution Approach 1:
The system transitions between operational modes based on battery thermal conditions: when battery temperature exceeds thresholds, the system enters dual-mode phase to prioritize battery cooling while maintaining partial passenger compartment cooling; when battery temperature is acceptable, it switches to single-mode phase for optimal passenger comfort
Solution Approach 2:
The control system modifies refrigerant distribution parameters and compressor operation based on battery thermal state, adjusting electronic expansion valve openings and refrigerant flow rates to balance battery safety requirements with passenger comfort considerations
3Reliability
If the refrigeration capacity is increased to meet both demands simultaneously, then both passenger comfort and battery safety are improved, but system complexity and cost increase
Solution Approach 1:
The refrigeration process is segmented into distinct phases: single-mode phase for prioritized cooling of one component, and dual-mode phase for simultaneous cooling. This temporal segmentation allows a single refrigeration system to meet both demands without requiring oversized capacity or complex parallel systems
Solution Approach 2:
The system uses dynamic mode switching between single-mode and dual-mode operation to provide flexible refrigeration capacity allocation, avoiding the need for permanently oversized equipment or complex multi-system architectures while maintaining ability to meet both passenger comfort and battery safety requirements when needed
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
Ensures the comfort of passengers while ensuring battery safety by flexibly allocating refrigeration performance, preventing overheating and maintaining system stability.
Implementation Method 1
When the refrigeration level of the battery is low, that is, it is in a non-emergency state, a control method following the principle of ensuring the comfort of the passenger compartment is given priority. In an individual refrigeration phase of the passenger compartment, the compressor is configured to control an air outlet temperature of an evaporator; and an electronic expansion valve (i.e., the first electronic expansion valve) in front of the evaporator (i.e., the internal heat exchanger) controls a supercooling degree of an external condenser (i.e., the external heat exchanger)
Data Source
AI summary
A vehicle refrigeration control method and apparatus, a device, a medium and a program product. A temperature and a change rate of the temperature of a battery in a target vehicle are monitored in real time; then a refrigeration requirement level of the battery is determined according to the temperature and the change rate; a refrigeration mode to be entered is determined according to a current refrigeration requirement level of the battery, when it is detected that a passenger compartment and the battery of the target vehicle both have refrigeration requirements at the same time; and control instructions of respective target control objects are determined according to the refrigeration mode, the refrigeration mode includes: a single-mode phase and a dual-mode phase, the single-mode phase is used for refrigerating the passenger compartment or the battery alone, the dual-mode phase is used for simultaneously refrigerating the passenger compartment and the battery.