Vehicle Heating Control for Cabin-First Battery Warm-Up
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Solution Overview
Problem
New energy vehicles face challenges in distributing and controlling heating capacity, particularly in low-temperature conditions where both passenger compartment and battery heating are required, as the limited heating capacity of existing systems struggles to meet simultaneous demands efficiently and energy-effectively.
Innovation Solution
A vehicle heating control method that utilizes a heat pump system to first heat the passenger compartment, then diverts heated coolant to the battery circuit, optimizing the use of the heat pump's capacity and supplementing with auxiliary heating when necessary to ensure both compartments are maintained within suitable working ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the heat pump system directly heats coolant for battery heating, then battery heating efficiency is improved, but passenger compartment heating comfort deteriorates due to limited heating capacity
Solution Approach 1:
The heating process is divided into two distinct stages: first, the heat pump system dedicates all heating capacity to the passenger compartment; second, after the passenger compartment reaches target temperature, the heat pump system switches to heat the coolant for battery heating. This temporal segmentation resolves the contradiction by ensuring full heating capacity is allocated to each function sequentially, maintaining passenger comfort while enabling efficient battery heating.
Solution Approach 2:
The system performs preliminary heating of the passenger compartment before initiating battery heating. By monitoring air outlet temperature and determining when the passenger compartment has reached sufficient warmth, the system prepares the thermal environment in advance, ensuring that battery heating can proceed without compromising passenger comfort.
2Reliability
If auxiliary heating is used for battery heating, then battery heating reliability is improved, but energy consumption increases
Solution Approach 1:
The heat pump system serves as an intermediary heating source for the battery. Instead of directly using auxiliary heating elements in the battery circuit, the system uses the heat pump to heat coolant, which then circulates through the battery. This intermediary approach allows the system to leverage the more energy-efficient heat pump rather than relying solely on direct auxiliary heating, reducing overall energy consumption while maintaining reliable battery heating.
3Speed
If the heat pump system operates at full capacity for passenger compartment heating, then heating speed is improved, but battery temperature control precision deteriorates
Solution Approach 1:
The system dynamically adjusts its operating mode based on real-time temperature conditions. Temperature sensors continuously monitor both the passenger compartment air outlet and battery temperature, allowing the control system to switch between heating modes (passenger compartment heating vs. battery heating) and adjust heat pump capacity accordingly. This dynamic control ensures rapid initial heating when needed while maintaining precise temperature control during battery heating operations.
Solution Approach 2:
The system implements feedback control by continuously monitoring battery temperature and adjusting the heat pump system's heating output. When the battery reaches the target temperature or the temperature difference falls within a preset range, the system reduces or stops heating, preventing overheating and ensuring precise temperature control throughout the heating process.
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 heating efficiency and energy savings by fully utilizing the heat pump system while ensuring the comfort of the passenger compartment and effective battery heating, addressing the limitations of existing systems in managing simultaneous heating demands.
Implementation Method 1
the heat pump system heats coolant through a warm air core
Implementation Method 2
guides the heated coolant into a battery circuit to transfer heat to a battery
Data Source
AI summary
A vehicle heating control method and apparatus, a device, a medium, and a program product are provided, when a heating requirement exists in both a passenger compartment and a battery of a target vehicle is detected, turning on a passenger compartment heating mode which 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 which 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.