KR-102965067-B1 - INTEGRATED THERMAL MANAGEMENT SYSTEM FOR VEHICLE

KR102965067B1KR 102965067 B1KR102965067 B1KR 102965067B1KR-102965067-B1

Abstract

An integrated thermal management system for a vehicle is introduced, comprising: a first cooling line; a second cooling line; a refrigerant line; and a bypass line that branches off from the second cooling line and connects to a chiller, thereby bypassing the second radiator to allow coolant to circulate between the high-voltage battery and the chiller.

Inventors

김기목
오만주
윤현근
배효찬
이상신

Assignees

현대자동차주식회사
기아 주식회사

Dates

Publication Date: 20260513
Application Date: 20201102

Claims (15)

A first cooling line that allows coolant to circulate between the electronic drive unit and the first radiator; A second cooling line that allows coolant to circulate between the high-voltage battery and the second radiator; A refrigerant line that allows refrigerant to flow in the order of a compressor, an internal condenser of an indoor air conditioning system, and an outdoor condenser outside the vehicle, and allows refrigerant discharged from the outdoor condenser to flow into the compressor after passing through an evaporator or chiller of the indoor air conditioning system; and It includes a bypass line that branches off from the second cooling line and connects to the chiller, thereby bypassing the second radiator and allowing cooling water to circulate between the high-voltage battery and the chiller; A dehumidification line is connected to the refrigerant line so that the refrigerant flowing through the internal condenser branches off, bypasses the outdoor condenser, and flows into the evaporator. An integrated thermal management system for a vehicle characterized in that a third expansion valve is provided in the refrigerant line at a point upstream of the branch point of the dehumidification line, and in the dehumidification mode, the refrigerant expanded through the third expansion valve is supplied to the chiller and simultaneously supplied to the evaporator through the dehumidification line, and the refrigerant that has passed through the chiller and the evaporator is combined and supplied to the compressor and internal condenser.
In claim 1, An integrated thermal management system for a vehicle characterized by having a first expansion valve provided at the refrigerant inlet of the chiller and a second expansion valve provided at the refrigerant inlet of the evaporator.
In claim 1, An integrated thermal management system for a vehicle characterized by having a water heater provided at a downstream point of the high-voltage battery in the second cooling line.
In claim 1, An integrated thermal management system for a vehicle characterized in that the first cooling line and the second cooling line are connected together to an integrated reservoir, allowing for the mixing of some coolant.
In claim 1, An integrated thermal management system for a vehicle characterized in that the first radiator and the second radiator are combined to form an integrated unit.
In claim 1, An integrated thermal management system for a vehicle characterized in that air passing through an internal condenser passes through an electric heater in the indoor air conditioning system.
A first cooling line that allows coolant to circulate between the electronic drive unit and the first radiator; A second cooling line that allows coolant to circulate between the high-voltage battery and the second radiator; A refrigerant line that allows refrigerant to flow in the order of a compressor, an internal condenser of an indoor air conditioning system, and an outdoor condenser outside the vehicle, and allows refrigerant discharged from the outdoor condenser to flow into the compressor after passing through an evaporator or chiller of the indoor air conditioning system; and It includes a bypass line that branches off from the second cooling line and connects to the chiller, thereby bypassing the second radiator and allowing cooling water to circulate between the high-voltage battery and the chiller; An integrated thermal management system for a vehicle characterized in that an auxiliary line bypassing the outdoor condenser is connected to the refrigerant line, and in the event of frosting of the outdoor condenser in heat pump mode, the refrigerant in the refrigerant line bypasses the outdoor condenser through the auxiliary line and flows to the chiller.
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In claim 1, An integrated thermal management system for a vehicle characterized by having an auxiliary line connected to the refrigerant line, through which the refrigerant flowing through the internal condenser branches to bypass the external condenser and is connected to an evaporator or chiller, and a dehumidification line connected to which the refrigerant bypasses the external condenser and flows into the evaporator.
In claim 1, An integrated thermal management system for a vehicle characterized by having a first pump provided in the first cooling line and a second pump provided in the second cooling line.
In claim 12, An integrated thermal management system for a vehicle characterized by having a 3-way valve provided at the branching point of the second cooling line and the bypass line, and a second pump provided between the 3-way valve and the high-voltage battery.
In claim 13, An integrated thermal management system for a vehicle characterized in that a first pump, a second pump, a three-way valve, and a chiller are combined to form a module.
In claim 13, An integrated thermal management system for a vehicle, characterized in that the first cooling line and the second cooling line are connected together to an integrated reservoir to mix some of the coolant, and the integrated reservoir is combined with a first pump, a second pump, a 3-way valve, and a chiller to form a module.

Description

Integrated Thermal Management System for Vehicle The present invention relates to an integrated thermal management system for a vehicle that enables the effective control of an electronic drive unit, a high-voltage battery, and an interior space independently, and can increase the overall energy efficiency of the vehicle through integrated thermal management. Recently, driven by policies to expand the supply of eco-friendly vehicles and a preference for fuel-efficient cars, the number of registered eco-friendly vehicles, including electric vehicles, is on the rise. Electric vehicles or fuel cell vehicles, which are a type of eco-friendly automobile, operate using electric batteries and electric motors instead of petroleum fuels or engines. Electric vehicles feature a system in which the motor rotates using electricity stored in a high-voltage battery to drive the vehicle; consequently, they offer the advantages of zero harmful emissions, low noise levels, and high energy efficiency. Conventional engine-powered vehicles utilize engine waste heat to operate their in-car heating systems, whereas electric vehicles, lacking engines, use electricity to power their heaters. Consequently, electric vehicles face the problem of significantly reduced driving range when heated. Furthermore, battery modules must be used in an optimal temperature environment to maintain optimal performance and a long lifespan. However, due to heat generated during operation and external temperature fluctuations, it is currently difficult to use them in such an optimal environment. To address these issues, there is active discussion regarding ways to organically combine the air conditioning system and thermal management system of electric vehicles. The matters described above as background technology are intended only to enhance understanding of the background of the present invention and should not be construed as an acknowledgment that they constitute prior art already known to those skilled in the art. FIGS. 1 to 15 are diagrams showing the operation of an integrated thermal management system of a vehicle according to an embodiment of the present invention by mode. FIGS. 16 to 33 are diagrams showing the operation of an integrated thermal management system of a vehicle according to another embodiment of the present invention in different modes. FIGS. 1 to 15 are drawings showing the operation of an integrated thermal management system of a vehicle according to one embodiment of the present invention in different modes, and FIGS. 16 to 33 are drawings showing the operation of an integrated thermal management system of a vehicle according to another embodiment of the present invention in different modes. First, FIGS. 1 to 15 are drawings showing the operation of an integrated thermal management system of a vehicle according to one embodiment of the present invention in different modes, which corresponds to a case where the heat pump principle is not used. The integrated thermal management system for a vehicle according to the present invention can be applied to vehicles driven by a battery and a motor, such as electric vehicles or fuel cell vehicles. The integrated thermal management system of the present invention can perform cooling of an electronic drive unit composed of a motor, an inverter, a converter, etc., as well as heating and cooling of a high-voltage battery and heating and cooling of an indoor air conditioning system. Specifically, the integrated thermal management system of the present invention comprises: a first cooling line (10) that allows cooling water to circulate between an electronic drive unit (120) and a first radiator (100); a second cooling line (20) that allows cooling water to circulate between a high-voltage battery (220) and a second radiator (200); and a refrigerant line (30) that allows refrigerant to flow in the order of a compressor (330), an internal condenser (340) of an indoor air conditioning unit (H), and an outdoor condenser (300) outside the vehicle, and allows the refrigerant discharged from the outdoor condenser (300) to flow into the compressor (330) after passing through an evaporator (310) or a chiller (C) of the indoor air conditioning unit (H). and a bypass line (25) that branches off from the second cooling line (20) and connects to the chiller (C) to bypass the second radiator (200) and allow cooling water to circulate between the high-voltage battery (220) and the chiller (C). The first cooling line (10) allows cooling water to circulate between the electronic drive unit (120) and the first radiator (100). Since the electronic drive unit (120) is relatively stable even under high temperature conditions, the necessary cooling can be achieved solely through the circulation of cooling water. The second cooling line (20) allows cooling water to circulate between the high-voltage battery (220) and the second radiator (200). If the high-voltage battery (220) requires cooling under mild conditi