Vehicle Heat Circuit Switching for Battery Warm-Up Efficiency
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Solution Overview
Problem
Existing heat management systems in electrified vehicles inefficiently utilize heat generated by driving devices for temperature raising of electrical storage devices, leading to suboptimal performance and charging efficiency.
Innovation Solution
A heat management system with a network of flow passages and a switching device that disconnects the chiller device from the temperature raising circuit, allowing heat from the driving device to efficiently raise the electrical storage device's temperature, thereby preventing heat loss to the chiller and optimizing temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the chiller device is connected to the temperature raising circuit to cool the electrical storage device, then the electrical storage device temperature can be controlled, but the heat from the driving device cannot be effectively utilized for temperature raising
Solution Approach 1:
The heat management system divides the flow passage network into separate independent circuits: a temperature raising circuit (first flow passage connecting electrical storage device and driving device) and a cooling circuit (second flow passage connecting electrical storage device and chiller device). The switching device enables selective connection of these circuits based on operational requirements, allowing heat from the driving device to be utilized for temperature raising without being dissipated by the chiller device.
Solution Approach 2:
The switching device dynamically reconfigures the flow passage connections based on the operational state and temperature requirements of the electrical storage device. When temperature raising is needed, the switching device connects the first flow passage to form the temperature raising circuit while disconnecting the second flow passage from the chiller device, thereby adapting the system configuration to optimize heat utilization.
2Temperature
If the chiller device operates during temperature raising, then temperature control is maintained, but heat loss increases and temperature raising efficiency decreases
Solution Approach 1:
The system segments the cooling function from the temperature raising circuit by providing a separate second flow passage for the chiller device. During temperature raising operation, the switching device disconnects the second flow passage, preventing the chiller device from operating in the temperature raising circuit and thereby eliminating heat loss that would reduce temperature raising efficiency.
3Device complexity
If a single flow passage system is used, then device complexity is reduced, but the ability to independently control temperature raising and cooling functions is compromised
Solution Approach 1:
The flow passage system is segmented into multiple independent circuits (first flow passage for temperature raising, second flow passage for cooling) that can be selectively connected or disconnected via the switching device. This segmentation enables independent control of temperature raising and cooling functions while maintaining a relatively simple overall system structure.
Solution Approach 2:
The switching device provides multi-functionality by enabling the system to operate in different configurations: it can connect the first flow passage for temperature raising operation, connect the second flow passage for cooling operation, or disconnect the second flow passage to prevent heat loss during temperature raising. This universal switching mechanism provides adaptability without requiring completely separate independent systems.
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 configuration enables efficient temperature raising of electrical storage devices, enhancing travel performance and charging efficiency by effectively utilizing heat generated from the driving device, while minimizing cooling by the chiller device.
Implementation Method 1
an electrical storage device configured to perform heat exchange with the heat medium in the first flow passage
Implementation Method 2
a driving device configured to perform heat exchange with the heat medium in the second flow passage and configured to generate a driving force
Implementation Method 3
a radiator provided in the third flow passage
Implementation Method 4
a chiller device provided in the fourth flow passage
Data Source
AI summary
A heat management system has: a first flow passage, a second flow passage, a third flow passage, and a fourth flow passage; an electrical storage device configured to perform heat exchange with a heat medium in the first flow passage; a driving device configured to perform heat exchange with a heat medium in the second flow passage; a radiator provided in the third flow passage; a chiller device provided in the fourth flow passage; and a switching device. When a temperature of the electrical storage device is raised, the switching device is configured to cause a temperature raising circuit to be formed, the temperature raising circuit being a flow passage circuit in which a connection flow passage connecting the first flow passage, the second flow passage, and the third flow passage to one another is provided, with the fourth flow passage being independent of the connection flow passage.