Vehicle Battery Heating Control Using Superposed Multi-Loop Heat Sources
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing thermal management systems for vehicle batteries, such as those in new energy vehicles, are inefficient in rapidly heating batteries due to the slow heating speed of heat pump systems, failing to meet customer demands for rapid heating in low ambient temperatures.
Innovation Solution
A thermal management system incorporating an electric-drive heat exchange system, a heat-pump heat exchange system, and a battery heat exchange system, utilizing multiple heat sources including an electric-drive locked-rotor, a heat pump system, and a heater to rapidly heat the battery by superposing heat through interconnected loops and controlled heat exchange processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a heat pump system is used to heat the battery, then energy efficiency is improved, but the heating speed is slow and cannot meet customer demands
Solution Approach 1:
The patent combines three heat sources (heat pump system, heater, and electric-drive locked-rotor) into a unified thermal management system. The heat pump system provides efficient heating while the heater and locked-rotor contribute additional heat to achieve rapid heating, thus maintaining energy efficiency while improving heating speed.
Solution Approach 2:
The system dynamically switches between different heating modes based on temperature requirements. When rapid heating is needed, the heater and locked-rotor are activated alongside the heat pump. When moderate heating suffices, only the heat pump operates, optimizing energy efficiency.
2Speed
If multiple heat sources are superposed to heat the battery, then heating rate is improved, but system complexity increases
Solution Approach 1:
The thermal management system is designed with multi-functionality, where the heat pump system, heater, and locked-rotor can operate independently or in combination. The control unit intelligently selects and coordinates these components based on heating requirements, achieving rapid heating without proportionally increasing system complexity through smart integration.
Solution Approach 2:
The control unit acts as an intermediary that coordinates the multiple heat sources. It manages the activation and coordination of the heat pump system, heater, and locked-rotor, simplifying the control of multiple components through a centralized intelligence that optimizes their combined operation.
3Temperature
If the heater and heat pump system are used together, then heating capability is improved, but energy consumption increases
Solution Approach 1:
The system applies partial action by using the heater and locked-rotor only when rapid heating is required, rather than continuously. The heat pump system operates as the primary heating source for normal conditions, while the heater and locked-rotor provide supplemental heat temporarily to achieve rapid temperature increase, then are deactivated to reduce energy consumption.
Solution Approach 2:
The heater and locked-rotor are activated periodically or temporarily during the heating process to provide rapid temperature increase, then deactivated. This periodic supplementation of heat sources achieves high heating capability during critical periods while maintaining lower energy consumption during non-critical periods when only the heat pump operates.
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 achieves rapid battery heating by superposing heat from multiple sources, improving heating rates and efficiency, ensuring effective battery operation in low temperatures.
Implementation Method 1
a first pump and an electric-drive heat exchanger that are arranged in the first loop; a compressor, an indirect condenser, an electronic expansion valve and a cooler that are sequentially arranged in the second loop, where the first loop is connected to the cooler, the first loop being configured to exchange heat with the second loop
Implementation Method 2
a compressor, an indirect condenser, an electronic expansion valve and a cooler that are sequentially arranged in the second loop
Implementation Method 3
the third loop is connected to the indirect condenser, the second loop is configured to exchange heat with the third loop
Implementation Method 4
a heater and a battery heat exchanger that are arranged in the third loop
Implementation Method 5
a heater and a battery heat exchanger that are arranged in the third loop, where the third loop is connected to the indirect condenser
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A thermal management system includes: an electric-drive heat exchange system including a first loop (101); a heat-pump heat exchange system including a second loop (201), where the first loop (101) can exchange heat with the second loop (201); and a battery heat exchange system including a third loop (301), where the second loop (201) can exchange heat with the third loop (301).