KR-102962271-B1 - THERMAL MANAGEMENT SYSTEM FOR VEHICLE

KR102962271B1KR 102962271 B1KR102962271 B1KR 102962271B1KR-102962271-B1

Abstract

A thermal management system for a vehicle is disclosed. A thermal management system for a vehicle according to an embodiment of the present invention comprises: a radiator connected to a coolant line, a plurality of electrical components, and a plurality of water pumps, and a cooling device that circulates coolant in the coolant line so as to supply coolant to the plurality of electrical components; and a plurality of oil coolers connected to cool a plurality of drive motors and supplied with coolant from the cooling device; wherein, among the plurality of oil coolers, one oil cooler is provided in the coolant line, and the remaining oil cooler may be arranged in parallel with another oil cooler provided in the coolant line through a parallel line provided in the coolant line.

Inventors

김재연
김수환
김연호
김재완
조완제
정성빈

Assignees

현대자동차 주식회사
기아 주식회사

Dates

Publication Date: 20260507
Application Date: 20210330

Claims (20)

A cooling device comprising a radiator connected to a cooling water line, a plurality of electrical components, and a plurality of water pumps, and circulating cooling water in the cooling water line so as to supply cooling water to the plurality of electrical components; and A plurality of oil coolers connected to cool a plurality of drive motors and supplied with cooling water from the cooling device; comprising, Among the plurality of oil coolers above, one oil cooler is provided in the cooling water line, and the remaining oil cooler is arranged in parallel with another oil cooler provided in the cooling water line through a parallel line provided in the cooling water line. The above plurality of water pumps A first water pump provided in the cooling water line connecting the radiator and the parallel line; and A second water pump provided in the cooling water line connecting the first water pump and the second oil cooler at a position spaced apart from the parallel line; comprising A branch line, one end of which is connected to the coolant line between the radiator and the parallel line, and the other end of which is connected to the coolant line between the heat exchanger and the radiator; further comprising The other end of the above branch line is A thermal management system for a vehicle characterized by being connected to the coolant line through a branch valve provided in the coolant line.
In paragraph 1, The above plurality of drive motors are each composed of a first and a second drive motor corresponding to the front and rear wheels, and The above plurality of oil coolers are A first oil cooler provided in the parallel line corresponding to the first drive motor; and A second oil cooler provided in the cooling water line corresponding to the second drive motor; A thermal management system for a vehicle characterized by including
In paragraph 1, One end of the above parallel line is connected to the cooling water line at a position spaced apart from the rear end of the first water pump, and A thermal management system for a vehicle characterized in that the other end of the above parallel line is connected to the coolant line at the front end of the radiator based on the flow direction of the coolant.
In paragraph 1, The pumping head of the first water pump mentioned above is A thermal management system for a vehicle characterized by having a head greater than the head of the second water pump so that the flow rate of the coolant supplied to the parallel line and the coolant line becomes similar.
In paragraph 1, If the first water pump and the second water pump are pumps with the same pumping head, A thermal management system for a vehicle characterized in that the first water pump and the second water pump operate at different RPMs (revolutions per minute) so that the flow rates of the coolant supplied to the first and second oil coolers through the parallel line and the coolant line become similar.
In paragraph 5, The RPM (revolution per minute) of the first water pump above is A thermal management system for a vehicle characterized by operating at a higher RPM (revolution per minute) than the RPM (revolution per minute) of the second water pump.
In paragraph 2, The above plurality of electrical components are A thermal management system for a vehicle, characterized by including an inverter and an on-board charger (OBC), and including first and second electrical components respectively disposed in the coolant line and the parallel line corresponding to the first and second oil coolers.
In paragraph 1, An air conditioning device comprising a heat exchanger connected to the above-mentioned cooling water line to exchange heat with the refrigerant flowing into the interior, and an expansion valve, an evaporator, and a compressor connected to the heat exchanger and the refrigerant line; A thermal management system for a vehicle characterized by further including
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In paragraph 8, It further includes a sub-cooling device that includes a sub-radiator and a sub-water pump connected to a sub-cooling line and circulates coolant in the sub-cooling line, and A thermal management system for a vehicle characterized in that the heat exchanger is connected to the sub-cooling line so that cooling water is supplied from the sub-cooling device.
In paragraph 2, The first drive motor is connected to the first oil cooler and the first oil line, and the first oil line is equipped with a first oil pump. A thermal management system for a vehicle characterized in that the second drive motor is connected to the second oil cooler and the second oil line, and the second oil line is equipped with a second oil pump.
In paragraph 1, A thermal management system for a vehicle characterized by having a reservoir tank provided in the coolant line between the radiator and the plurality of water pumps.
A cooling device comprising a radiator connected to a cooling water line, a plurality of electrical components, and a plurality of water pumps, and circulating cooling water in the cooling water line so as to supply cooling water to the plurality of electrical components; and A plurality of oil coolers connected to cool a plurality of drive motors and supplied with cooling water from the cooling device; comprising, Among the plurality of oil coolers above, one oil cooler is provided in the cooling water line, and the remaining oil cooler is arranged in parallel with another oil cooler provided in the cooling water line through a parallel line provided in the cooling water line. The plurality of water pumps are provided in the cooling water line connecting the radiator and the parallel line at the front end of the parallel line, and One end of the above parallel line is connected to the cooling water line through a valve at a position spaced apart from the rear end of the water pump, and The other end of the above parallel line is connected to the coolant line at the front end of the radiator with respect to the direction of flow of the coolant, and One end is connected to the cooling water line between the radiator and the parallel line, and the other end is a branch line connected between the heat exchanger and the radiator through a branch valve provided in the cooling water line; A thermal management system for a vehicle characterized by further including
In Paragraph 13, A thermal management system for a vehicle characterized in that the above valve is a 3-way valve capable of distributing the flow rate.
In Paragraph 13, The plurality of drive motors above are each configured as first and second drive motors corresponding to the front and rear wheels, and The above plurality of oil coolers are A first oil cooler provided in the parallel line corresponding to the first drive motor; and A second oil cooler provided in the cooling water line corresponding to the second drive motor; A thermal management system for a vehicle characterized by including
In paragraph 15, The first drive motor is connected to the first oil cooler and the first oil line, and the first oil line is equipped with a first oil pump. A thermal management system for a vehicle characterized in that the second drive motor is connected to the second oil cooler and the second oil line, and the second oil line is equipped with a second oil pump.
In Paragraph 16, The above plurality of electrical components are A thermal management system for a vehicle, characterized by including an inverter and an on-board charger (OBC), and including first and second electrical components respectively disposed in the coolant line and the parallel line corresponding to the first and second oil coolers.
In Paragraph 13, An air conditioning device comprising a heat exchanger connected to the above-mentioned cooling water line to exchange heat with the refrigerant flowing into the interior, and an expansion valve, an evaporator, and a compressor connected to the heat exchanger and the refrigerant line; A thermal management system for a vehicle characterized by further including
In Paragraph 18, It further includes a sub-cooling device that includes a sub-radiator and a sub-water pump connected to a sub-cooling line and circulates coolant in the sub-cooling line, and A thermal management system for a vehicle characterized in that the heat exchanger is connected to the sub-cooling line so that cooling water is supplied from the sub-cooling device.
In Paragraph 13, A thermal management system for a vehicle characterized by having a reservoir tank provided in the coolant line between the radiator and the plurality of water pumps.

Description

Thermal Management System for Vehicle The present invention relates to a thermal management system for vehicles, and more specifically, to a thermal management system for vehicles that improves the cooling performance of electrical components and a drive motor by controlling the flow rate of coolant in an electric vehicle. Recently, as environmental and energy resource issues have become increasingly important, electric vehicles are gaining attention as a means of transportation for the future. Since electric vehicles utilize a battery module formed by combining multiple rechargeable cells into a single pack as their primary power source, they produce no exhaust gases and generate very little noise. These electric vehicles are driven by a drive motor that operates using power supplied from a battery module. In addition, the electric vehicle is equipped with electrical components for controlling and managing the drive motor and charging the battery module, along with numerous electronic devices for convenience. Meanwhile, since the motor, battery, and electrical components used as the primary power source for electric vehicles generate a significant amount of heat, efficient cooling is required; therefore, efficient temperature management of the motor, electrical components, and battery modules is a critical issue. Conventionally, separate cooling systems were applied to control the temperature of electrical components, motors, and battery modules; however, since the capacity must be increased according to the size of the motors, electrical components, and battery modules, there is a problem of space constraints. In addition, increasing the capacity of each cooling system leads to the problem of increased power consumption required to operate each system. Accordingly, in electric vehicles, there is a need for technological development to efficiently control the temperature of electrical components and battery modules while simplifying the cooling system, in order to maximize energy efficiency while ensuring the durability of motors, electrical components, and battery modules. The matters described in this background technology section are written to enhance understanding of the background of the invention and may include matters that are not prior art already known to those skilled in the art to which this technology belongs. FIG. 1 is a block diagram of a thermal management system for a vehicle according to a first embodiment of the present invention. FIG. 2 is a block diagram of a thermal management system for a vehicle according to a second embodiment of the present invention. FIG. 3 is a block diagram of a thermal management system for a vehicle according to a third embodiment of the present invention. FIG. 4 is a block diagram of a thermal management system for a vehicle according to the fourth embodiment of the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, and that various equivalents and modifications that can replace them may exist at the time of filing this application. To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. The size and thickness of each component shown in the drawings are depicted arbitrarily for the convenience of explanation, and thus the present invention is not necessarily limited to what is shown in the drawings; furthermore, the thickness has been enlarged to clearly represent various parts and regions. And throughout the specification, when a part is described as “comprising” a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. In addition, terms such as “...unit,” “...means,” “...part,” and “...part” as described in the specification refer to a unit of comprehensive configuration that performs at least one function or operation. FIG. 1 is a block diagram of a thermal management system for a vehicle according to a first embodiment of the present invention. A thermal management system for a vehicle according to the first embodiment of the present invention can improve the cooling performance of electrical components and a drive motor by controlling the flow rate of the coolant. This thermal management system can be applied to electric vehicles. Referring to FIG. 1, the thermal management system may include a cooling device (10) and a plurality of oil coolers. First, the cooling device (10) includes a radiator (12) connected to a cooling water line (11), a