Vehicle Heating Control With Coolant Diversion for Battery Warming
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Solution Overview
Problem
New energy vehicles face challenges in efficiently distributing and controlling heating capacity between the passenger compartment and battery due to limited heating capacity, especially in low-temperature conditions, which affects battery performance and passenger comfort.
Innovation Solution
A method and apparatus that utilizes a heat pump system to first heat the passenger compartment, then diverts heated coolant to the battery circuit through a warm air core, optimizing heating distribution and supplementing with a PTC heater when necessary, ensuring efficient and energy-saving heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heat pump system directly heats the battery through the coolant circulation system, then the battery can be heated efficiently, but the passenger compartment heating requirement cannot be met simultaneously due to limited heating capacity
Solution Approach 1:
The patent segments the heating process into two distinct phases: first heating the passenger compartment through the air handling unit, then diverting the heated coolant to heat the battery. This temporal segmentation allows the limited heat pump capacity to serve different functions sequentially, resolving the contradiction between battery heating and passenger compartment heating requirements
Solution Approach 2:
The system performs preliminary heating of the passenger compartment before directing heat to the battery. By first warming the air in the passenger compartment and then utilizing the remaining heat capacity in the coolant to heat the battery, the system optimizes the distribution of limited heating resources across different thermal needs
2Reliability
If the heating capacity is allocated to heat the battery first, then the battery performance can be maintained, but the passenger compartment comfort deteriorates due to insufficient heating
Solution Approach 1:
The system prioritizes passenger compartment heating as a preliminary action before battery heating. The control method first activates the air handling unit to warm the passenger compartment, ensuring comfort requirements are met before any heat is diverted to the battery, thus maintaining ease of operation while subsequently addressing reliability concerns
3Adaptability or versatility
If multiple heating systems operate simultaneously, then both passenger compartment and battery can be heated, but energy consumption increases due to limited heating capacity
Solution Approach 1:
The patent segments the operation of heating systems into sequential phases rather than simultaneous operation. The air handling unit operates first to heat the passenger compartment, then the coolant circulation system is activated to heat the battery. This temporal segmentation enables simultaneous heating capability while avoiding the energy consumption penalty of parallel system operation
Solution Approach 2:
The system maintains continuous useful action by seamlessly transitioning from air-based heating to coolant-based heating. The heat pump system continuously operates, first delivering heat to the air handling unit and then to the coolant circulation system, ensuring uninterrupted heating functionality while optimizing energy utilization across different thermal sinks
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 ensures efficient heating of both the passenger compartment and battery while optimizing energy usage, improving user comfort and battery performance without energy waste.
Implementation Method 1
perform heating process on air in the passenger compartment by using a heat exchanger of a heat pump system
Implementation Method 2
heat the coolant through a warm air core
Implementation Method 3
guides the heated coolant into a battery circuit to transfer heat to a battery, thereby increasing battery temperature
Data Source
Figure 1~2
Figure 3A
Figure 3B
AI summary
The present application provides a vehicle heating control method and apparatus, a device, a medium, and a program product. The method includes: turning on a passenger compartment heating mode when detecting that a heating requirement exists in both a passenger compartment and a battery of a target vehicle, where the passenger compartment heating mode is used to perform heating process on air in the passenger compartment by using a heat exchanger of a heat pump system and/or a coolant circulation system in an air handling unit; then monitoring in real time whether air temperature at an air outlet or operating time of the passenger compartment heating mode meets a first preset requirement; if yes, turning on a diversion mode and sending a preset control instruction to a target device, where the preset control instruction is used to heat coolant in a warm air circuit by using the heat pump system, and divert the coolant to a battery circuit to heat the battery. It solves the technical problem that how to distribute and control heating capacity of new energy vehicles, and achieves the technical effect of using the heat pump system to heat the battery, not only improving heating efficiency but also saving energy.