Method for controlling heat pump system for vehicle

Abstract

Provided is a method for controlling a heat pump system for a vehicle, which improves heating efficiency by efficiently recovering heat energy generated by a battery while adjusting the temperature of the battery.

Description

Technical Field

[0001] This disclosure relates to a control method for a vehicle heat pump system, and more specifically, to a control method for a vehicle heat pump system that can improve heating efficiency by controlling the temperature of the battery and simultaneously efficiently recovering the heat energy generated by the battery. Background Technology

[0002] Typically, a vehicle's air conditioning system includes an air conditioning unit that circulates refrigerant to heat or cool the vehicle's interior.

[0003] The air conditioning unit is used to maintain the interior temperature of the vehicle at an appropriate level, regardless of changes in the external temperature, in order to maintain a comfortable interior environment. The air conditioning unit is configured to heat or cool the interior of the vehicle by means of heat exchange between the condenser and the evaporator during the process of refrigerant being discharged by the compressor circulating back to the compressor through the condenser, receiver-dryer, expansion valve and evaporator.

[0004] In other words, in summer cooling mode, the air conditioning unit reduces the internal temperature and humidity by condensing the high-temperature, high-pressure gaseous refrigerant compressed from the compressor in the condenser, passing the refrigerant through the receiver-dryer and expansion valve, and then evaporating the refrigerant in the evaporator.

[0005] On the other hand, in recent years, as people have become increasingly concerned about energy efficiency and environmental pollution, there is a need to develop environmentally friendly vehicles that can substantially replace internal combustion engine vehicles. These environmentally friendly vehicles are classified as electric vehicles that use fuel cells or electricity as a power source and hybrid vehicles that use engines and batteries as a power source.

[0006] In these environmentally friendly vehicles, such as electric or hybrid vehicles, instead of using a separate heater like in conventional vehicles, the air conditioning systems used in environmentally friendly vehicles are often referred to as heat pump systems.

[0007] On the other hand, since a lot of heat is generated in the batteries and drive motors, which are the main power sources of electric vehicles, as well as in the electrical components, efficient cooling is required. Therefore, efficient temperature management of electrical components and batteries may be a very important issue.

[0008] In addition, since the battery performs best at a preset temperature, it needs to be heated to the preset temperature quickly at the beginning of driving.

[0009] Previously, a separate cooling system was used to regulate the temperature of electrical components and batteries, but this required a corresponding increase in the cooling system's capacity, leading to space constraints. Furthermore, as the cooling system capacity increases, the power required to operate it also increases.

[0010] In addition, in the past, when the battery needed to be cooled while the vehicle interior was being heated, even if there was sufficient waste heat from the battery, the heat pump system had to be switched to a mode that used a coolant that exchanged heat with the refrigerant to cool the battery, which resulted in a decrease in power efficiency and heating performance.

[0011] Furthermore, when switching from heating mode to a mode that uses a coolant to cool the battery by exchanging heat with the refrigerant in order to cool the battery, the cooling of the battery is temporarily interrupted due to the delay caused by the compressor stopping operation, which makes it difficult to manage the battery's temperature efficiently.

[0012] Therefore, in order to prevent the power efficiency of electric vehicles from declining, ensure battery durability, and maximize energy efficiency, it is necessary to develop a technology that controls battery temperature and efficiently utilizes the waste heat generated by the battery.

[0013] The information disclosed in this background section is intended to enhance the understanding of the background of this disclosure and may therefore contain information that does not constitute prior art known to those skilled in the art in this country. Summary of the Invention

[0014] This disclosure attempts to provide a control method for a heat pump system for vehicles, which improves heating efficiency by efficiently recovering the heat energy generated by the battery while adjusting the battery temperature.

[0015] A control method for a vehicle heat pump system includes the following steps: (A) When a user operates a heating mode for heating the vehicle interior, a controller circulates coolant to electrical components and a cooler, and while controlling the operation of the heat pump system, the controller determines whether the battery temperature is higher than or equal to a first predetermined temperature based on data detected from a data detection unit; (B) When the battery temperature is determined to be higher than or equal to the first predetermined temperature through step (A), while circulating coolant to the battery and cooler and maintaining the heating mode, the controller determines the compressor discharge pressure, the amount of change in the compressor discharge pressure, and the vehicle interior temperature, and controls the operation of the cooling fan and the heat pump system; (C) After performing step (B), the controller determines the amount of change in the battery temperature and circulates coolant to the radiator and the battery; and (D) After performing step (C), the controller determines whether the battery temperature is higher than a second predetermined temperature based on data detected from the data detection unit, thereby controlling the operation of the cooling fan and the heat pump system while circulating coolant to the battery and cooler, and controlling the compressor by determining whether the battery temperature is higher than a third predetermined temperature and whether the battery temperature is lower than the first predetermined temperature.

[0016] Process (A) may include: the controller operating a heating mode based on the user operating the heat pump system to heat the vehicle interior; the controller connecting electrical components and the cooler through at least two lines through which coolant flows and controlling the operation of the heat pump system; and the controller determining whether the battery temperature is higher than or equal to a first predetermined temperature based on data detected from the data detection unit.

[0017] In the step of the controller connecting electrical components and coolers through at least two lines through which refrigerant flows and controlling the operation of the heat pump system, the controller may be configured to: control a first expansion valve to close so that refrigerant is not supplied to the evaporator; control a second expansion valve to open so that unexpanded refrigerant is supplied to the cooler; control a third expansion valve to open to perform expansion so that expanded refrigerant is supplied to the heat exchanger; and operate the compressor at maximum speed (RPM).

[0018] In the step of determining whether the battery temperature is higher than or equal to a first predetermined temperature, when it is determined that the battery temperature is lower than the first predetermined temperature (i.e., when the condition is not met), the method may revert to connecting the electrical components and the cooler by using at least two pipelines through which the coolant flows and controlling the operation of the heat pump system.

[0019] In the step of determining whether the battery temperature is higher than or equal to the first predetermined temperature, when it is determined that the battery temperature is higher than or equal to the first predetermined temperature (i.e., the condition is met), process (B) can be executed.

[0020] Process (B) may include: the controller connecting the battery and the cooler using at least two lines through which coolant flows; the controller determining, based on data detected from the data detection unit, whether the compressor discharge pressure is greater than a predetermined pressure; in the step of determining whether the compressor discharge pressure is greater than the predetermined pressure, when the controller determines that the compressor discharge pressure is greater than the predetermined pressure (i.e., the condition is met), the controller increases the opening of a third expansion valve operated to perform expansion; the controller determining, based on data detected from the data detection unit, whether the change in compressor discharge pressure is greater than 0; in the step of determining whether the change in compressor discharge pressure is greater than 0, when the controller determines that the change in compressor discharge pressure is greater than 0 (i.e., the condition is met), the controller reduces the compressor speed; the controller determining, based on data detected from the data detection unit, whether the vehicle interior temperature is higher than a predetermined target temperature; and in the step of determining whether the vehicle interior temperature is higher than the target temperature, when the controller determines that the vehicle interior temperature is higher than the target temperature (i.e., the condition is met), the controller controls the cooling fan and controls the heat pump system such that the use of the heat pump system can be minimized.

[0021] In the step of determining whether the compressor discharge pressure is greater than a predetermined pressure, when it is determined that the compressor discharge pressure is less than the predetermined pressure (i.e., when the condition is not met), the method may return to the controller connecting the battery and the cooler by using at least two lines through which the coolant flows.

[0022] In the step of determining whether the change in compressor discharge pressure is greater than 0, when it is determined that the change in compressor discharge pressure is less than 0 (i.e., when the condition is not met), the method may return to the controller increasing the opening of the third expansion valve operated to open to perform expansion.

[0023] In the step of determining whether the vehicle interior temperature is higher than the target temperature, if it is determined that the vehicle interior temperature is lower than the target temperature (i.e., when the condition is not met), the method can return to the controller to reduce the compressor speed.

[0024] In the step of controlling the cooling fan and the heat pump system to minimize the use of the heat pump system, the controller can be configured to: operate the compressor at a minimum speed; reduce the speed of the cooling fan; and reduce the speed of the corresponding water pump, thereby reducing the flow rate of coolant circulating through the battery and the cooler.

[0025] The process (C) may include: the controller determining whether the battery temperature change is higher than 0°C based on data detected from the data detection unit; and in the step of determining whether the battery temperature change is higher than 0°C, when it is determined that the battery temperature change is higher than 0°C (i.e., the condition is met), the controller connects the heat sink and the battery by using at least two lines through which the coolant flows.

[0026] In the step of determining whether the battery temperature change is above 0°C, if it is determined that the battery temperature change is below 0°C (i.e., when the condition is not met), the method can return to process (B), where the controller connects the battery and the cooler using at least two lines through which the coolant flows.

[0027] Process (D) may include: the controller determining whether the battery temperature is higher than a second predetermined temperature based on data detected from the data detection unit; in the step of determining whether the battery temperature is higher than the second predetermined temperature, when it is determined that the battery temperature is higher than the second predetermined temperature (i.e., the condition is met), the controller connects the battery and the cooler by using at least two pipelines through which the coolant flows, and controls the operation of the cooling fan and the heat pump system; the controller determining whether the battery temperature is higher than a third predetermined temperature based on data detected from the data detection unit; in the step of determining whether the battery temperature is higher than the third predetermined temperature, when it is determined that the battery temperature is higher than the third predetermined temperature (i.e., the condition is met), the controller increases the speed of the compressor; the controller determining whether the battery temperature is lower than a first predetermined temperature based on data detected from the data detection unit; and in the step of determining whether the battery temperature is lower than the first predetermined temperature, when the controller determines that the battery temperature is lower than the first predetermined temperature (i.e., the condition is met), the controller terminates control.

[0028] In the step of determining whether the battery temperature is higher than the second predetermined temperature, when it is determined that the battery temperature is lower than the second predetermined temperature (i.e., when the condition is not met), the method can return to process (C), where the controller connects the radiator and the battery by using at least two lines through which the coolant flows.

[0029] In the steps of connecting the battery and cooler by using at least two lines through which the coolant flows, and controlling the operation of the cooling fan and heat pump system, the controller can be configured to: control the first expansion valve to close so that refrigerant is not supplied to the evaporator; control the second expansion valve to open to perform expansion so that the expanded refrigerant is supplied to the cooler; control the third expansion valve to open so that the unexpanded refrigerant is supplied to the heat exchanger; and increase the speed of the cooling fan.

[0030] In the step of determining whether the battery temperature is higher than the third predetermined temperature, when it is determined that the battery temperature is lower than the third predetermined temperature (i.e., when the condition is not met), the method may return to the controller connecting the battery and the cooler by using at least two lines through which the coolant flows, and controlling the operation of the cooling fan and heat pump system.

[0031] In the step of determining whether the battery temperature is lower than the first predetermined temperature, if it is determined that the battery temperature is higher than the first predetermined temperature (i.e., the condition is not met), the method can return to the controller to increase the compressor speed.

[0032] The data detection unit may include: a battery temperature sensor configured to measure battery temperature; a pressure sensor configured to measure the pressure of refrigerant discharged from the compressor (i.e., the compressor discharge pressure); and a vehicle interior temperature sensor configured to measure vehicle interior temperature.

[0033] The controller can be electrically connected to a heat pump system, and the heat pump system can include: a compressor configured to compress incoming refrigerant; a heating, ventilation, and air conditioning (HVAC) module having an internal condenser and evaporator connected to the compressor via refrigerant lines; a heat exchanger connected to the internal condenser via refrigerant lines and configured to condense or evaporate refrigerant supplied from the internal condenser by heat exchange with air; a first expansion valve disposed on the refrigerant line between the heat exchanger and the evaporator; a refrigerant connection line disposed between the compressor and the evaporator, with a first end connected to the refrigerant line and a second end connected to the refrigerant line between the heat exchanger and the first expansion valve; a cooler disposed on the refrigerant connection line and configured to allow heat exchange between refrigerant introduced via the refrigerant connection line and selectively introduced coolant to adjust the temperature of the coolant; a second expansion valve disposed on the refrigerant connection line upstream of the cooler; and a third expansion valve disposed on the refrigerant line between the internal condenser and the heat exchanger.

[0034] The controller can be electrically connected to a cooling device configured to circulate coolant, and the cooling device can include: a valve module configured to control the flow direction of coolant flowing into it; a first line connected to the valve module to selectively allow coolant flow, and electrical components disposed on the first line; a second line, with a first end connected to the first line and a second end connected to the valve module to selectively allow coolant flow, and a radiator disposed on the second line; a third line connected to the valve module to selectively allow coolant flow, and a battery disposed on the third line; a fourth line, with a first end connected to the valve module to selectively allow coolant flow and a second end connected to the third line; a fifth line, with a first end connected to the valve module to selectively allow coolant flow, and a cooler disposed at the second end; a sixth line, with a first end connected to the first line at the junction of the first and second lines and a second end connected to the cooler to selectively allow coolant flow; and a seventh line, with a first end connected to the third line at the junction of the third and fourth lines and a second end connected to the cooler to selectively allow coolant flow.

[0035] As described above, the control method for a vehicle heat pump system according to the embodiment can improve heating efficiency by efficiently recovering the heat energy generated by the battery while adjusting the battery temperature.

[0036] Furthermore, according to this disclosure, vehicle interior heating can be prioritized by using the maximum waste heat of the battery in the available area of ​​the heat pump, and by switching to a mode that uses a coolant cooled at the radiator or a coolant that exchanges heat with the refrigerant, depending on the battery temperature, power efficiency reduction can be prevented and overall heating performance can be improved.

[0037] Furthermore, according to this disclosure, when switching from a heating mode to a mode that uses a coolant that exchanges heat with the refrigerant to cool the battery, the mode switching can be achieved through the operation control of each expansion valve without stopping the operation of the compressor, thereby preventing delay time caused by mode switching and managing the battery temperature more efficiently.

[0038] Furthermore, according to this disclosure, the optimal performance of the battery can be achieved by efficiently adjusting the battery temperature, and the total driving range of the vehicle can be increased through efficient battery management. Attached Figure Description

[0039] Figure 1 This is a block diagram of a heat pump system that applies the control method of a vehicle heat pump system according to an embodiment.

[0040] Figure 2 This is a block diagram illustrating a heat pump system control device to which a control method for a vehicle heat pump system according to an embodiment is applied.

[0041] Figure 3A and Figure 3B This is a control flowchart used to explain the control method of a vehicle heat pump system according to an embodiment. Detailed Implementation

[0042] The embodiments will be described in detail below with reference to the accompanying drawings.

[0043] The exemplary embodiments disclosed in this specification and the structures shown in the accompanying drawings are merely preferred embodiments of this disclosure and do not cover the full scope of this disclosure. Therefore, it should be understood that various equivalents and modifications may exist when applying this specification.

[0044] For the purpose of clarifying this disclosure, parts unrelated to the description will be omitted, and throughout the specification, the same elements or equivalents will be indicated by the same reference numerals.

[0045] Furthermore, the dimensions and thicknesses of each element are shown arbitrarily in the accompanying drawings, but this disclosure is not necessarily limited thereto, and the thicknesses of layers, films, panels, regions, etc., are exaggerated in the drawings for clarity.

[0046] Furthermore, unless otherwise expressly stated, “comprising” and its variations, such as “including” or “containing”, should be understood as implying the inclusion of the stated element, but not excluding any other element.

[0047] Furthermore, each term described in this specification, such as “...unit”, “...part”, “...section”, “...component”, and “...building”, refers to a unit of integrated elements that performs at least one function or operation.

[0048] Figure 1 This is a block diagram of a vehicle heat pump system according to an embodiment.

[0049] Reference Figure 1 The control method for the vehicle heat pump system according to the embodiment can be controlled by the controller 100 and can be applied to electric vehicles or hybrid vehicles that use the heat pump system 50 to improve heating efficiency by efficiently recovering the heat energy generated by the battery 9 while controlling the temperature of the battery 9.

[0050] Here, as Figure 1 As shown, the heat pump system 50 can be linked with the cooling device 1.

[0051] First, the cooling device 1 may include a valve module 10, a first pipeline 11, a second pipeline 12, a third pipeline 13, a fourth pipeline 14, a fifth pipeline 15, a sixth pipeline 16, and a seventh pipeline 17.

[0052] The valve module 10 can be configured to control the flow direction of the coolant flowing into it via a control signal from the controller 100.

[0053] In an exemplary embodiment, a first end of the first pipeline 11 may be connected to a valve module 10, and coolant may flow selectively. Electrical components 3 may be provided on the first pipeline 11.

[0054] The first end of the second pipeline 12 can be connected to the second end of the first pipeline 11. The second end of the second pipeline 12 can be connected to the valve module 10 and can selectively allow coolant to flow.

[0055] A radiator 5 and a coolant reservoir 7 can be installed on the second pipeline 12. The radiator 5 can be located at the front of the vehicle. A cooling fan 6 can be installed behind the radiator 5.

[0056] Therefore, the radiator 5 can cool the coolant by operating the cooling fan 6 and exchanging heat with the ambient air.

[0057] In an exemplary embodiment, the first end of the third pipeline 13 may be connected to the valve module 10 to selectively allow coolant flow. The battery 9 may be disposed on the third pipeline 13.

[0058] The first end of the fourth line 14 can be connected to the valve module 10 to selectively allow coolant flow. The second end of the fourth line 14 can be connected to the second end of the third line 13.

[0059] In this exemplary embodiment, the first end of the fifth pipeline 15 may be connected to the valve module 10 to selectively allow coolant flow. A cooler 59 may be provided at the second end of the fifth pipeline 15.

[0060] Here, the cooler 59 can be connected to the refrigerant line 51 of the heat pump system 50 via the refrigerant connection line 58. The cooler 59 can be a water-cooled heat exchanger, which is configured to allow the coolant flowing into it to exchange heat with the refrigerant supplied from the heat pump system 50.

[0061] In other words, the cooler 59 can adjust the temperature of the coolant by exchanging heat between the selectively supplied coolant and the selectively supplied refrigerant from the heat pump system 50.

[0062] Here, when cooling the battery 9 by using a coolant that has exchanged heat with the refrigerant, or when heating the vehicle interior, the cooler 59 can be operated to recover heat from the coolant heated by the waste heat of the electrical components 3 or the waste heat of the battery 9.

[0063] The first end of the sixth pipeline 16 can be connected to the first pipeline 11 at the point where the first pipeline 11 and the second pipeline 12 connect. The second end of the sixth pipeline 16 can be connected to the cooler 59, and the coolant can flow selectively depending on the operation of the valve module 10.

[0064] Furthermore, the first end of the seventh pipeline 17 can be connected to the third pipeline 13 at the point where the third pipeline 13 and the fourth pipeline 14 meet. The second end of the seventh pipeline 17 can be connected to the cooler 59.

[0065] Coolant can flow selectively through the seventh line 17 configured as such, depending on the operation of the valve module 10.

[0066] On the other hand, in an exemplary embodiment of this disclosure, the valve module 10 may include at least one water pump. Here, the at least one water pump may include a first water pump 10a and a second water pump 10b.

[0067] First, the first water pump 10a can be mounted on the valve module 10 corresponding to the first pipeline 11. Furthermore, the second water pump 10b can be mounted on the valve module 10 corresponding to the third pipeline 13.

[0068] Here, the first water pump 10a and the second water pump 10b can be positioned facing each other with reference to the valve module 10.

[0069] The cooling device 1 configured in this way can be electrically connected to the controller 100 and can be operated according to the control signals of the controller 100.

[0070] In addition, the heat pump system 50 may include a compressor 52, an HVAC module 53, a heat exchanger 54, a first expansion valve 55, a liquid receiver 57, a refrigerant connection line 58, a cooler 59, a second expansion valve 61, and a third expansion valve 62.

[0071] First, the compressor 52 can compress the incoming refrigerant and cause the compressed refrigerant to flow to the refrigerant line 51, so that the refrigerant circulates along the refrigerant line 51.

[0072] An internal condenser 53a and an evaporator 56 connected via a refrigerant line 51 may be installed inside the HVAC module 53.

[0073] Here, inside the HVAC module 53, an opening and closing door 53b can be provided between the evaporator 56 and the internal condenser 53a. The opening and closing door 53b is configured to adjust the ambient air that has passed through the evaporator 56 so that it selectively flows into the internal condenser 53a.

[0074] When heating the interior of the vehicle, the door 53b can be opened to allow ambient air that has passed through the evaporator 56 to flow into the internal condenser 53a.

[0075] In other words, the high-temperature refrigerant supplied to the internal condenser 53a can increase the temperature of the ambient air passing through the internal condenser 53a. That is, the incoming ambient air can be converted to a high-temperature state when passing through the internal condenser 53a, and then flow into the vehicle interior, thereby achieving heating of the vehicle interior.

[0076] Conversely, when cooling the vehicle interior, the opening and closing door 53b can close the side facing the internal condenser 53a, allowing ambient air cooled by passing through the evaporator 56 to flow directly into the vehicle interior.

[0077] Therefore, the ambient air passing through evaporator 56 can be cooled by the low-temperature refrigerant supplied to evaporator 56 as it passes through evaporator 56. The cooled ambient air can then be introduced into the vehicle interior to cool the vehicle interior.

[0078] The heat exchanger 54 can be connected to the internal condenser 53a via a refrigerant line 51. The heat exchanger 54 can be located at the front of the vehicle. The heat exchanger 54 can be located between the radiator 5 and the cooling fan 6.

[0079] In other words, heat exchanger 54 can be an air-cooled heat exchanger configured to allow the incoming refrigerant to exchange heat with the ambient air.

[0080] In this exemplary embodiment, a first expansion valve 55 may be provided on the refrigerant line 51 connecting the heat exchanger 54 and the evaporator 56. The first expansion valve 55 can selectively expand the incoming refrigerant.

[0081] Here, the heat pump system may also include a receiver 57 disposed on the refrigerant line 51, located between the evaporator 56 and the compressor 52. The receiver 57 can improve the efficiency and durability of the compressor 52 by supplying only gaseous refrigerant to the compressor 52.

[0082] The first end of the refrigerant connection line 58 can be connected to the refrigerant line 51 between the evaporator 56 and the receiver 57. The second end of the refrigerant connection line 58 can be connected to the refrigerant line 51 between the heat exchanger 54 and the first expansion valve 55.

[0083] Cooler 59 can be installed on refrigerant connection line 58. Cooler 59 can adjust the temperature of the coolant by exchanging heat between the refrigerant flowing in through refrigerant connection line 58 and the coolant selectively flowing in from cooling device 1.

[0084] In an exemplary embodiment, the second expansion valve 61 may be disposed on the refrigerant connection line 58, located upstream of the cooler 59. The second expansion valve 61 may be an electronic expansion valve configured to selectively expand the refrigerant while controlling the flow direction of the supplied refrigerant.

[0085] Here, the upstream and downstream ends of the cooler 59 can be defined based on the refrigerant flow direction. Using the refrigerant flow direction along the refrigerant connection line 58 as a reference, the location where the refrigerant flows into the cooler 59 can be defined as the upstream end of the cooler 59, and the location where the refrigerant exits from the cooler 59 can be defined as the downstream end of the cooler 59.

[0086] Furthermore, a third expansion valve 62 can be installed on the refrigerant line 51, located between the internal condenser 53a and the heat exchanger 54. The third expansion valve 62 can be an electronic expansion valve, configured to selectively expand the refrigerant while controlling the flow direction of the supplied refrigerant.

[0087] On the other hand, the heat exchanger 54 can condense or evaporate the refrigerant by exchanging heat with ambient air, depending on the selective operation of the third expansion valve 62.

[0088] In other words, when cooling the interior of the vehicle, the heat exchanger 54 can condense the refrigerant while exchanging heat with the ambient air, through the operation of the third expansion valve 62 to introduce unexpanded refrigerant.

[0089] Conversely, when heating the vehicle interior, the heat exchanger 54 can exchange heat between the refrigerant and the ambient air while simultaneously recovering heat from the ambient air as the expanded refrigerant is introduced through the operation of the third expansion valve 62.

[0090] The heat pump system 50 configured in this way can be electrically connected to the controller 100.

[0091] In other words, the cooling device 1 and the heat pump system 50 can be linked by the cooler 59.

[0092] Below, we will refer to Figure 2 , Figure 3A and Figure 3B A control method for a vehicle heat pump system configured as described above is described.

[0093] Figure 2 This is a block diagram of a heat pump system control device illustrating a control method for a vehicle heat pump system according to an embodiment. Figure 3A and Figure 3B This is a control flowchart used to explain the control method for a vehicle heat pump system according to an embodiment.

[0094] like Figure 2 As shown, the cooling device 1 and the heat pump system 50 can be controlled by a heat pump system control device, which may include a controller 100 and a data detection unit 110.

[0095] In an exemplary embodiment of this disclosure, the data detection unit 110 can detect data for the controller 100 to control the operation of the cooling device 1 and the heat pump system 50.

[0096] The data detected by the data detection unit 110 can be transmitted to the controller 100. The data detection unit 110 may include a battery temperature sensor 111, a pressure sensor 112, and a vehicle interior temperature sensor 113.

[0097] First, the battery temperature sensor 111 can measure the temperature of the battery 9. That is, the battery temperature sensor 111 can measure the temperature of the battery 9 and transmit the relevant signal to the controller 100.

[0098] Pressure sensor 112 can measure the pressure of the refrigerant discharged from compressor 52 (discharge pressure of compressor 52). Pressure sensor 112 can measure the compressor discharge pressure and can transmit the relevant signal to controller 100.

[0099] In addition, a vehicle interior temperature sensor 113 can be installed inside the vehicle. The vehicle interior temperature sensor 113 can measure the temperature inside the vehicle and transmit the relevant signal to the controller 100.

[0100] The controller 100 may be implemented as one or more processors operated by a predetermined program, and the predetermined program may include a set of instructions for performing the various steps included in the air conditioning system control method according to the embodiments described later.

[0101] Therefore, in the control method of the vehicle heat pump system according to the embodiment, the controller 100 can be configured to control the temperature of the battery 9 based on the data detected by the data detection unit 110, while efficiently recovering the heat energy generated by the battery 9, thereby improving the heating efficiency.

[0102] Furthermore, in the control method of the heat pump system, the controller 100 can use the maximum waste heat of the battery 9 in the available area of ​​the heat pump based on the data detected by the data detection unit 110 to prioritize the heating of the vehicle interior, and switch to a mode of cooling using the coolant cooled by the radiator 5 or using the coolant that exchanges heat with the refrigerant, depending on the temperature of the battery 9, thereby preventing a decrease in power consumption efficiency and improving the overall heating performance.

[0103] Therefore, such as Figure 3A and Figure 3B As shown, the control method for a vehicle heat pump system according to an embodiment may include process (A), process (B), process (C) and process (D).

[0104] In an exemplary embodiment, during process (A), when a user operates the heating mode to heat the interior of the vehicle, the controller 100 can circulate coolant to the electrical components 3 and the cooler 59, and while controlling the operation of the heat pump system 50, it determines whether the temperature of the battery 9 is higher than or equal to a first predetermined temperature based on data detected from the data detection unit 110.

[0105] Process (A) may include the following steps.

[0106] First, in step S1, when the user operates the heat pump system to heat the interior of the vehicle, the controller 100 can operate the heating mode.

[0107] Therefore, in step S2, the controller 100 can connect the electrical component 3 and the cooler 59 through at least two pipelines through which the coolant flows, and control the operation of the heat pump system 50.

[0108] More specifically, the controller 100 can operate the valve module 10 to interconnect the first pipeline 11, the sixth pipeline 16, and the fifth pipeline 15 in the cooling device 1.

[0109] Therefore, electrical component 3 and cooler 59 can be interconnected via first pipeline 11, sixth pipeline 16, and fifth pipeline 15. In this state, controller 100 can operate first water pump 10a, causing coolant to circulate along first pipeline 11, sixth pipeline 16, and fifth pipeline 15.

[0110] Meanwhile, the controller 100 can be configured to: control the first expansion valve 55 to close so that no refrigerant is supplied from the heat pump system 50 to the evaporator 56, and can be configured to: control the second expansion valve 61 to open so that unexpanded refrigerant is supplied to the cooler 59.

[0111] In addition, the controller 100 can be configured to: control the third expansion valve 62 to open to perform expansion, so that the expanded refrigerant can be supplied to the heat exchanger 54, and to operate the compressor 52 at maximum speed (RPM).

[0112] In other words, as described above, the controller 100 can be configured to control the operation of the heat pump system 50.

[0113] Therefore, the high-temperature, high-pressure refrigerant compressed at compressor 52 can flow along refrigerant line 51 and pass through internal condenser 53a. At this time, the opening / closing door 53b can be opened to allow ambient air that has passed through evaporator 56 to flow into internal condenser 53a.

[0114] Since the first expansion valve 55 is closed by the control signal of the controller 100, refrigerant will not be supplied to the first evaporator 56.

[0115] Here, the high-temperature refrigerant supplied to the internal condenser 53a can increase the temperature of the ambient air passing through the internal condenser 53a. In other words, the incoming ambient air can be converted to a high-temperature state when passing through the internal condenser 53a, and then flow into the vehicle interior, thereby achieving heating of the vehicle interior.

[0116] In this way, the refrigerant that has passed through the internal condenser 53a can expand at the third expansion valve 62 while flowing along the refrigerant line 51, and can then be introduced into the heat exchanger 54.

[0117] The heat exchanger 54 can be supplied with refrigerant that expands from the third expansion valve 62, and recovers heat from the ambient air while the supplied refrigerant evaporates through heat exchange with the ambient air. Furthermore, the refrigerant evaporated at the heat exchanger 54 can flow into the second expansion valve 61 along the refrigerant line 51 and the open refrigerant connection line 58.

[0118] At this time, the second expansion valve 61 can supply the refrigerant introduced by the control signal of the controller 100 to the cooler 59 without expansion. Therefore, the refrigerant that evaporates when passing through the heat exchanger 54 can be introduced into the cooler 59.

[0119] On the other hand, coolant whose temperature rises by absorbing waste heat from electrical components 3 as it circulates along the first pipeline 11, the sixth pipeline 16 and the fifth pipeline 15 can be supplied to cooler 59.

[0120] At this time, the cooler 59 can recover the waste heat of the electrical components 3 from the coolant whose temperature has increased due to heat exchange between the refrigerant and the coolant.

[0121] By operating in this way, when the interior of the vehicle needs to be heated, the heat pump system 50 can increase the temperature of the refrigerant by absorbing heat from the ambient air at the heat exchanger 54 and using the waste heat from the electrical components 3, thereby improving the heating efficiency.

[0122] On the other hand, the refrigerant that has passed through the cooler 59 can flow along the refrigerant connection line 58 and the refrigerant line 51 into the receiver 57. Furthermore, the refrigerant that has passed through the receiver 57 can be supplied to the compressor 52 while repeating the above process.

[0123] Upon completion of step S2, in step S3, the controller 100 can be configured to determine, based on the data detected from the data detection unit 110, whether the temperature of the battery 9 is higher than or equal to a first predetermined temperature.

[0124] Here, the first predetermined temperature can be 32℃.

[0125] In step S3, which determines whether the temperature of battery 9 is higher than or equal to the first predetermined temperature, process (B) can be executed when it is determined that the temperature of battery 9 is higher than or equal to the first predetermined temperature (i.e., the condition is met).

[0126] On the other hand, in step S3, when determining whether the temperature of battery 9 is higher than or equal to the first predetermined temperature, if it is determined that the temperature of battery 9 is lower than the first predetermined temperature (i.e., the condition is not met), the method can return to step S2 to connect the electrical components and the cooler, and control the operation of the heat pump system by using at least two pipelines through which the coolant flows.

[0127] In an exemplary embodiment, during process (B), when it is determined by process (A) that the temperature of the battery 9 is higher than or equal to a first predetermined temperature, the controller 100 can circulate coolant to the battery 9 and the cooler 59, and while maintaining the heating mode, it can determine the discharge pressure of the compressor 52, the amount of change in the discharge pressure of the compressor 52, and the interior temperature of the vehicle to control the operation of the cooling fan 6 and the heat pump system 50.

[0128] Process (B) may include the following steps.

[0129] When it is determined in step S3 of process (A) that the temperature of battery 9 is higher than or equal to the first predetermined temperature, in step S4, controller 100 can connect battery 9 and cooler 59 by using at least two pipelines through which coolant flows.

[0130] More specifically, the controller 100 can operate the valve module 10 to interconnect the third pipeline 13, the fifth pipeline 15, and the seventh pipeline 17 in the cooling device 1.

[0131] Therefore, battery 9 and cooler 59 can be interconnected via third line 13, fifth line 15 and seventh line 17. In this state, controller 100 can operate second water pump 10b to circulate coolant along third line 13, fifth line 15 and seventh line 17.

[0132] Meanwhile, the controller 100 can maintain control of the heat pump system 50, the same as in step S2.

[0133] In other words, the high-temperature, high-pressure refrigerant compressed at compressor 52 can flow along refrigerant line 51 and pass through internal condenser 53a. At this time, the opening and closing door 53b can be opened to allow ambient air that has passed through evaporator 56 to flow into internal condenser 53a.

[0134] Since the first expansion valve 55 is closed by the control signal of the controller 100, refrigerant will not be supplied to the first evaporator 56.

[0135] Here, the high-temperature refrigerant supplied to the internal condenser 53a can increase the temperature of the ambient air passing through the internal condenser 53a. In other words, the incoming ambient air can be converted to a high-temperature state when passing through the internal condenser 53a, and then introduced into the vehicle interior, thereby achieving heating of the vehicle interior.

[0136] In this way, the refrigerant that has passed through the internal condenser 53a can expand at the third expansion valve 62 while flowing along the refrigerant line 51, and can then be introduced into the heat exchanger 54.

[0137] The heat exchanger 54 can be supplied with refrigerant that expands from the third expansion valve 62, and the supplied refrigerant can evaporate by exchanging heat with ambient air, while recovering heat from the ambient air. Furthermore, the refrigerant evaporated at the heat exchanger 54 can flow into the second expansion valve 61 along the refrigerant line 51 and the open refrigerant connection line 58.

[0138] At this time, the second expansion valve 61 can supply the refrigerant introduced by the control signal of the controller 100 to the cooler 59 without expansion. Therefore, the refrigerant that evaporates when passing through the heat exchanger 54 can be introduced into the cooler 59.

[0139] On the other hand, coolant whose temperature rises by absorbing waste heat from battery 9 as it circulates sequentially along third pipeline 13, seventh pipeline 17 and fifth pipeline 15 can be supplied to cooler 59.

[0140] At this time, the cooler 59 can recover the waste heat of the battery 9 from the coolant whose temperature has increased due to heat exchange between the refrigerant and the coolant.

[0141] Therefore, when the temperature of the battery 9 is determined to be higher than or equal to a first predetermined temperature while heating the vehicle interior, the heat pump system 50 can absorb ambient air heat at the heat exchanger 54 and increase the temperature of the refrigerant by using the waste heat of the battery 9, thereby improving heating efficiency.

[0142] Furthermore, the refrigerant that has passed through the cooler 59 can flow along the refrigerant connection line 58 and the refrigerant line 51, and then flow into the receiver 57. Additionally, the refrigerant that has passed through the receiver 57 can repeat the above process while being supplied to the compressor 52.

[0143] Therefore, in step S5, the controller 100 can be configured to determine whether the discharge pressure of the compressor 52 is greater than a predetermined pressure based on the data detected from the data detection unit.

[0144] In step S5, when it is determined that the discharge pressure of compressor 52 is greater than the predetermined pressure (i.e., the condition is met), in step S6, controller 100 may increase the opening of third expansion valve 62, which is operated to open to perform expansion.

[0145] On the other hand, in step S5, when it is determined that the discharge pressure of compressor 52 is less than the predetermined pressure (i.e., when the condition is not met), the method can return to step S4 to connect the battery and the cooler by using at least two lines through which the coolant flows.

[0146] In an exemplary embodiment, when step S6 is completed, which involves increasing the opening of the third expansion valve 62 to perform expansion, in step S7, the controller 100 may be configured to determine, based on data detected from the data detection unit 110, whether the change in the discharge pressure of the compressor 52 is greater than 0.

[0147] In step S7, when it is determined that the change in the discharge pressure of compressor 52 is greater than 0 (i.e., the condition is met), in step S8, controller 100 can reduce the speed of compressor 52, thereby reducing the pressure of refrigerant discharged from compressor 52.

[0148] On the other hand, in determining whether the change in the discharge pressure of compressor 52 is greater than 0, when it is determined that the change in the discharge pressure of compressor 52 is less than 0 (i.e., the condition is not met), the method can return to step S6, which increases the opening of the third expansion valve 62, which is operated to open to perform expansion.

[0149] When step S8 is completed, in step S9, the controller 100 can be configured to determine whether the vehicle interior temperature is higher than a predetermined target temperature based on the data detected from the data detection unit 110.

[0150] Here, the target temperature can be the vehicle interior temperature set by the user.

[0151] In step S8, when it is determined that the vehicle interior temperature is higher than the target temperature (i.e., the condition is met), in step S10, the controller 100 can be configured to control the cooling fan 6 and the heat pump system 50 to minimize the use of the heat pump system 50.

[0152] Here, the controller 100 can operate the compressor 52 at minimum speed, reduce the speed of the cooling fan 6, and reduce the speed of the second water pump 10b, thereby reducing the flow rate of the coolant circulating through the battery 9 and the cooler 59.

[0153] On the other hand, in step S9, when determining whether the vehicle interior temperature is higher than the target temperature, if it is determined that the vehicle interior temperature is lower than the target temperature (i.e., when the condition is not met), the method can return to step S8, which reduces the speed of the compressor 52.

[0154] In an exemplary embodiment, when step S10 is completed, the controller 100 may execute process (C).

[0155] In process (C) following process (B), controller 100 can be configured to: determine the amount of temperature change of battery 9, and to circulate coolant to radiator 5 and battery 9.

[0156] The process (C) may include the following steps.

[0157] First, in step S11, the controller 100 can be configured to determine whether the temperature change of the battery 9 is higher than 0°C based on the data detected from the data detection unit 110.

[0158] In the step of determining whether the temperature change of battery 9 is higher than 0°C, when it is determined that the temperature change of battery 9 is higher than 0°C (i.e., the condition is met), in step S12, controller 100 can connect heat sink 5 and battery 9 by using at least two pipelines through which coolant flows.

[0159] More specifically, the controller 100 can operate the valve module 10 to interconnect the first pipeline 11, the second pipeline 12, the third pipeline 13 and the fourth pipeline 14 in the cooling device 1.

[0160] Therefore, the radiator 5 and the battery 9 can be interconnected via the first pipeline 11, the second pipeline 12, the third pipeline 13, and the fourth pipeline 14. In this state, the controller 100 can operate the first water pump 10a, causing the coolant to circulate along the first pipeline 11, the second pipeline 12, the third pipeline 13, and the fourth pipeline 14.

[0161] Through this operation, the battery 9 can be cooled as coolant is introduced at the radiator 5.

[0162] In addition, the heat pump system 50 can maintain the operating state controlled by the controller 100 in step S10 above.

[0163] On the other hand, in step S11, when it is determined that the temperature change of battery 9 is above 0°C, if it is determined that the temperature change of battery 9 is below 0°C (i.e., when the condition is not met), the method can return to step S4 in process (B) to connect battery 9 and cooler 59 by using at least two pipelines through which coolant flows.

[0164] Furthermore, when step S12 is completed, the controller 100 can execute process (D).

[0165] In an exemplary embodiment, in process (D) following execution process (C), controller 100 may be configured to: determine whether the temperature of battery 9 is higher than a second predetermined temperature based on data detected from data detection unit 110, so as to control the operation of cooling fan 6 and heat pump system 50 while circulating coolant to battery 9 and cooler 59; may be configured to: determine whether the temperature of battery 9 is higher than a third predetermined temperature, so as to control compressor 52; and may be configured to: determine whether the temperature of battery 9 is lower than a first predetermined temperature.

[0166] Process (D) may include the following steps.

[0167] First, in step S13, the controller 100 can be configured to determine whether the temperature of the battery 9 is higher than a second predetermined temperature based on the data detected from the data detection unit 110.

[0168] Here, the second predetermined temperature can be 36℃.

[0169] In the process of determining whether the temperature of battery 9 is higher than the second predetermined temperature, when it is determined that the temperature of battery 9 is lower than the second predetermined temperature (i.e., when the condition is not met), the method can return to step S12 to connect the heat sink 5 and battery 9 by using at least two pipelines through which coolant flows.

[0170] On the other hand, in step S13, when it is determined that the temperature of the battery 9 is higher than the second predetermined temperature (i.e., the condition is met), in step S14, the controller 100 can use at least two pipelines through which the coolant flows to connect the battery 9 and the cooler 59, and control the operation of the cooling fan 6 and the heat pump system 50.

[0171] More specifically, the controller 100 can operate the valve module 10 to interconnect the third pipeline 13, the fifth pipeline 15, and the seventh pipeline 17 in the cooling device 1.

[0172] Therefore, battery 9 and cooler 59 can be interconnected via third line 13, fifth line 15 and seventh line 17. In this state, controller 100 can operate second water pump 10b to circulate coolant along third line 13, fifth line 15 and seventh line 17.

[0173] Meanwhile, the controller 100 can be configured to: control the first expansion valve 55 to close so that refrigerant is not supplied to the evaporator 56, and control the second expansion valve 61 to open to perform expansion so that the expanded refrigerant can be supplied to the cooler 59.

[0174] In addition, the controller 100 can be configured to: control the third expansion valve 62 to open, so that unexpanded refrigerant is supplied to the heat exchanger 54, and increase the speed of the cooling fan 6.

[0175] In other words, as described above, the controller 100 can be configured to control the operation of the heat pump system 50.

[0176] Therefore, the high-temperature, high-pressure refrigerant compressed at compressor 52 can flow along refrigerant line 51 and pass through internal condenser 53a. At this time, the opening / closing door 53b can be opened to allow ambient air that has passed through evaporator 56 to flow into internal condenser 53a.

[0177] Since the first expansion valve 55 is closed by the control signal of the controller 100, refrigerant will not be supplied to the first evaporator 56.

[0178] Here, the high-temperature refrigerant supplied to the internal condenser 53a can increase the temperature of the ambient air passing through the internal condenser 53a. In other words, the incoming ambient air can be converted to a high-temperature state when passing through the internal condenser 53a, and then flow into the vehicle interior, thereby achieving heating of the vehicle interior.

[0179] In this way, the refrigerant that has passed through the internal condenser 53a can flow along the refrigerant line 51 and can flow into the heat exchanger 54 in an unexpanded state through the third expansion valve 62.

[0180] The heat exchanger 54 can be supplied with unexpanded refrigerant from the third expansion valve 62, and the supplied refrigerant can be condensed by exchanging heat with ambient air.

[0181] In addition, the refrigerant condensed at the heat exchanger 54 can flow into the second expansion valve 61 along the refrigerant line 51 and the open refrigerant connection line 58.

[0182] At this time, the second expansion valve 61 can expand the incoming refrigerant according to the control signal from the controller 100, and can supply the expanded refrigerant to the cooler 59. Therefore, the expanded refrigerant can be introduced into the cooler 59.

[0183] In addition, coolant passing through battery 9 along the third pipeline 13, the fifth pipeline 15 and the seventh pipeline 17 can be supplied to cooler 59.

[0184] Here, cooler 59 cools the coolant by exchanging heat with the expanded refrigerant. The coolant cooled by passing through cooler 59 can flow into valve module 10 along fifth line 15. Afterward, the coolant can flow from valve module 10 to third line 13 to supply the battery 9.

[0185] Through this operation, the battery 9 can be efficiently cooled by the coolant that exchanges heat with the refrigerant at the cooler 59.

[0186] Furthermore, the refrigerant that has passed through the cooler 59 can flow along the refrigerant connection line 58 and the refrigerant line 51 into the receiver 57. Additionally, the refrigerant that has passed through the receiver 57 can repeat the above process while being supplied to the compressor 52.

[0187] When step S14 is completed, in step S15, the controller 100 can be configured to determine whether the temperature of the battery 9 is higher than a third predetermined temperature based on the data detected from the data detection unit 110.

[0188] Here, the third predetermined temperature can be 42℃.

[0189] In step S15, when it is determined that the temperature of battery 9 is higher than the third predetermined temperature, if it is determined that the temperature of battery 9 is lower than the third predetermined temperature (i.e., when the condition is not met), the method can return to step S14 to connect battery 9 and cooler 59, and control the operation of cooling fan 6 and heat pump system 50 by using at least two pipelines through which coolant flows.

[0190] On the other hand, in step S15, when it is determined that the temperature of the battery 9 is higher than the third predetermined temperature (i.e., the condition is met), in step S16, the controller 100 may increase the speed of the compressor 52.

[0191] Thus, in step S17, the controller 100 can be configured to determine whether the temperature of the battery 9 is lower than a first predetermined temperature based on the data detected from the data detection unit 110.

[0192] In step S17, when it is determined that the temperature of battery 9 is lower than the first predetermined temperature, if it is determined that the temperature of battery 9 is higher than the first predetermined temperature (i.e., when the condition is not met), the method can return to the step of increasing the speed of compressor 52.

[0193] On the other hand, in step S17 of determining whether the temperature of battery 9 is lower than the first predetermined temperature, when it is determined that the temperature of battery 9 is lower than the first predetermined temperature (i.e., when the condition is met), controller 100 may terminate control.

[0194] Thus, while executing each step included in processes (A), (B), (C) and (D), the controller 100 can perform waste heat recovery, cooling with coolant cooled at the radiator 5, or cooling with coolant that exchanges heat with the refrigerant, based on the detected temperature of the battery 9, so that the battery 9 can operate in the optimal state.

[0195] Therefore, as described above, the control method for the vehicle heat pump system according to the embodiment can improve heating efficiency by efficiently recovering the heat energy generated by the battery 9 while controlling the temperature of the battery 9.

[0196] Furthermore, according to this disclosure, vehicle interior heating can be prioritized by using the maximum waste heat of battery 9 in the available area of ​​the heat pump, and by switching to a cooling mode that uses coolant cooled at radiator 5 or coolant that exchanges heat with refrigerant according to the temperature of battery 9, power efficiency reduction can be prevented and overall heating performance can be improved.

[0197] Furthermore, according to this disclosure, when switching from a heating mode to a cooling mode using a coolant that exchanges heat with the refrigerant in order to cool the battery 9, the mode switching can be controlled by the operation of the second expansion valve 61 and the third expansion valve 62 without stopping the operation of the compressor 52, thereby preventing delay time caused by mode switching and managing the temperature of the battery 9 more efficiently.

[0198] Furthermore, according to this disclosure, the optimal performance of the battery 9 can be achieved by efficiently adjusting the temperature of the battery 9, and the total driving range of the vehicle can be increased through efficient management of the battery 9.

[0199] While this disclosure has been described in conjunction with exemplary embodiments now considered useful hereof, it should be understood that this disclosure is not limited to the disclosed embodiments. On the other hand, this disclosure is intended to cover various modifications and equivalents within the spirit and scope of the appended claims.

[0200] <Symbol Explanation>

[0201] 1: Cooling device

[0202] 3: Electrical components

[0203] 5: Radiator

[0204] 6: Cooling fan

[0205] 7: Storage tank

[0206] 9: Battery

[0207] 11, 12: First pipeline and second pipeline

[0208] 13, 14: Third and Fourth Pipelines

[0209] 15, 16: Fifth and Sixth Pipelines

[0210] 17: Seventh Pipeline

[0211] 50: Heat pump system

[0212] 51: Refrigerant Piping

[0213] 52: Compressor

[0214] 53: HVAC Module

[0215] 54: Heat exchanger

[0216] 55: First expansion valve

[0217] 56: Evaporator

[0218] 57: Liquid reservoir

[0219] 58: Refrigerant connection lines

[0220] 59: Cooler

[0221] 61: Second expansion valve

[0222] 62: Third expansion valve

[0223] 100: Controller

[0224] 110: Data Detection Unit

[0225] 111: Battery Temperature Sensor

[0226] 112: Pressure sensor

[0227] 113: Vehicle interior temperature sensor

Claims

1. A control method for a vehicle heat pump system, the method Includes the following processes: (A) Based on the user operating the heating mode to heat the vehicle interior, the controller circulates coolant to the electrical components and cooler, and while controlling the operation of the heat pump system, the controller determines whether the battery temperature is higher than or equal to a first predetermined temperature based on data detected from the data detection unit. (B) When the controller determines through process (A) that the battery temperature is higher than or equal to the first predetermined temperature, while circulating the coolant to the battery and cooler and maintaining the heating mode, the controller determines the compressor discharge pressure, the amount of change in the compressor discharge pressure and the vehicle interior temperature, and controls the operation of the cooling fan and heat pump system. (C) After the execution of process (B), the controller determines the amount of change in battery temperature and circulates coolant to the radiator and battery; as well as (D) After execution process (C), the controller determines whether the battery temperature is higher than the second predetermined temperature based on the data detected from the data detection unit, thereby controlling the operation of the cooling fan and heat pump system while circulating the coolant to the battery and cooler, and controlling the compressor by determining whether the battery temperature is higher than the third predetermined temperature and whether the battery temperature is lower than the first predetermined temperature.

2. The control method according to claim 1, wherein, Process (A) includes the following steps: The controller operates the heat pump system based on the user's intention to heat the vehicle interior, running in heating mode. The controller connects the electrical components and the cooler via at least two lines through which the coolant flows, and controls the operation of the heat pump system; and The controller determines whether the battery temperature is higher than or equal to a first predetermined temperature based on the data detected from the data detection unit.

3. The control method according to claim 2, wherein, In the step of the controller connecting the electrical components and the cooler via at least two lines through which the coolant flows, and controlling the operation of the heat pump system, the controller is configured to: The first expansion valve is closed to prevent refrigerant from being supplied to the evaporator; The second expansion valve is opened to allow unexpanded refrigerant to be supplied to the cooler; Control the opening of the third expansion valve to perform expansion, so that the expanded refrigerant is supplied to the heat exchanger; and The compressor is operated at its maximum speed (RPM).

4. The control method according to claim 2, wherein, When the controller determines that the battery temperature is below the first predetermined temperature during the step of determining whether the battery temperature is higher than or equal to the first predetermined temperature, the method returns to connecting the electrical components and the cooler by using at least two pipelines through which the coolant flows and controlling the operation of the heat pump system.

5. The control method according to claim 2, wherein, When the controller determines that the battery temperature is higher than or equal to the first predetermined temperature during the step of determining whether the battery temperature is higher than or equal to the first predetermined temperature, process (B) is executed.

6. The control method according to claim 2, wherein, Process (B) includes the following steps: The controller connects the battery and the cooler using at least two lines through which the coolant flows; The controller determines whether the compressor's discharge pressure is greater than the predetermined pressure based on the data detected by the data detection unit; When the controller determines that the compressor discharge pressure is greater than the predetermined pressure during the step of determining whether the compressor discharge pressure is greater than the predetermined pressure, the controller increases the opening of the third expansion valve, which is operated to open to perform expansion. The controller determines whether the change in the compressor's discharge pressure is greater than 0 based on the data detected from the data detection unit. When the controller determines that the change in the compressor's discharge pressure is greater than 0 during the step of determining whether the change in the compressor's discharge pressure is greater than 0, the controller reduces the compressor's speed. The controller determines whether the vehicle's interior temperature is higher than a predetermined target temperature based on data detected by the data detection unit; and When the controller determines whether the vehicle's interior temperature is higher than the target temperature, and if it does, the controller controls the cooling fan and the heat pump system to minimize the use of the heat pump system.

7. The control method according to claim 6, wherein, When the controller determines that the compressor's discharge pressure is less than the predetermined pressure during the step of determining whether the compressor's discharge pressure is greater than the predetermined pressure, The method returns to the controller by connecting the battery and the cooler through at least two lines through which the coolant flows.

8. The control method according to claim 6, wherein, When the controller determines that the change in compressor discharge pressure is less than 0 during the step of determining whether the change in compressor discharge pressure is greater than 0, The method returns to the controller to increase the opening of the third expansion valve, which is operated to open to perform expansion.

9. The control method according to claim 6, wherein, When the controller determines that the vehicle's interior temperature is lower than the target temperature during the step of determining whether the vehicle's interior temperature is higher than the target temperature, The method returns to the controller to reduce the compressor speed.

10. The control method according to claim 6, wherein, In the step of controlling the cooling fan and the heat pump system to minimize the use of the heat pump system, the controller is configured as follows: Operate the compressor at minimum speed; Reduce the speed of the cooling fan; and Reducing the speed of the corresponding water pump decreases the flow rate of coolant circulating through the battery and cooler.

11. The control method according to claim 6, wherein, Process (C) includes the following steps: The controller determines whether the battery temperature change exceeds 0°C based on data detected by the data detection unit; and When the controller determines that the battery temperature change is greater than 0°C during the step of determining whether the battery temperature change is greater than 0°C, the controller connects the heat sink and the battery by using at least two lines through which the coolant flows.

12. The control method according to claim 11, wherein, When the controller determines that the battery temperature change is below 0°C during the step of determining whether the battery temperature change is above 0°C, The method returns to process (B), where the controller connects the battery and the cooler using at least two lines through which the coolant flows.

13. The control method according to claim 11, wherein, Process (D) includes the following steps: The controller determines whether the battery temperature is higher than a second predetermined temperature based on the data detected from the data detection unit; When the controller determines that the battery temperature is higher than the second predetermined temperature in the step of determining whether the battery temperature is higher than the second predetermined temperature, the controller connects the battery and the cooler by using at least two pipelines through which the coolant flows, and controls the operation of the cooling fan and heat pump system. The controller determines whether the battery temperature is higher than a third predetermined temperature based on the data detected from the data detection unit; When the controller determines that the battery temperature is higher than the third predetermined temperature during the step of determining whether the battery temperature is higher than the third predetermined temperature, the controller increases the speed of the compressor. The controller determines whether the battery temperature is below a first predetermined temperature based on data detected from the data detection unit; and When the controller determines that the battery temperature is below the first predetermined temperature during the step of determining whether the battery temperature is below the first predetermined temperature, the controller terminates the control.

14. The control method according to claim 13, wherein, When the controller determines that the battery temperature is below the second predetermined temperature during the step of determining whether the battery temperature is higher than the second predetermined temperature, The method returns to process (C), where the controller connects the radiator and the battery using at least two lines through which the coolant flows.

15. The control method according to claim 13, wherein, In the steps of connecting the battery and cooler using at least two lines through which coolant flows, and controlling the operation of the cooling fan and heat pump system, the controller is configured to: The first expansion valve is closed to prevent refrigerant from being supplied to the evaporator; The second expansion valve is opened to perform expansion, so that the expanded refrigerant is supplied to the cooler; The third expansion valve is opened to allow unexpanded refrigerant to be supplied to the heat exchanger; and Increase the speed of the cooling fan.

16. The control method according to claim 13, wherein, When the controller determines that the battery temperature is below the third predetermined temperature during the step of determining whether the battery temperature is higher than the third predetermined temperature, The method returns to the controller to connect the battery and cooler using at least two lines through which the coolant flows, and to control the operation of the cooling fan and heat pump system.

17. The control method according to claim 13, wherein, When the controller determines that the battery temperature is higher than the first predetermined temperature during the step of determining whether the battery temperature is lower than the first predetermined temperature, The method returns to the controller to increase the compressor speed.

18. The control method according to claim 1, wherein, The data detection unit includes: A battery temperature sensor is configured to measure battery temperature; A pressure sensor is configured to measure the pressure of the refrigerant discharged from the compressor; and A vehicle interior temperature sensor is configured to measure the temperature inside the vehicle.

19. The control method according to claim 1, in, The controller is electrically connected to the heat pump system, and The heat pump system includes: A compressor is configured to compress the incoming refrigerant; Heating, ventilation and air conditioning (HVAC) module, in which an internal condenser and evaporator are connected to the compressor via refrigerant lines; A heat exchanger, connected to an internal condenser via refrigerant lines, is configured to condense or evaporate the refrigerant supplied from the internal condenser by exchanging heat with air. The first expansion valve is installed on the refrigerant line, located between the heat exchanger and the evaporator; A refrigerant connection line is located between the compressor and the evaporator, with one end connected to the refrigerant line and the other end connected to the refrigerant line between the heat exchanger and the first expansion valve. A cooler is installed on the refrigerant connection line and is configured to allow heat exchange between the refrigerant introduced through the refrigerant connection line and a selectively introduced coolant to adjust the temperature of the coolant. The second expansion valve is located on the refrigerant connection line, upstream of the cooler; and The third expansion valve is installed on the refrigerant line, located between the internal condenser and the heat exchanger.

20. The control method according to claim 1, in, The controller is electrically connected to a cooling device configured to circulate coolant, and The cooling device includes: The valve module is configured to control the flow direction of the coolant flowing into the interior; The first pipeline connects to the valve module to selectively allow coolant to flow, and electrical components are located on the first pipeline; The second pipeline has a first end connected to the first pipeline and a second end connected to the valve module to selectively allow coolant flow, and the radiator is located on the second pipeline. The third line connects to the valve module to selectively allow coolant flow, and The battery is located on the third pipeline; The fourth pipeline has its first end connected to the valve module to selectively allow coolant flow, and its second end connected to the third pipeline; The fifth pipeline has its first end connected to a valve module to selectively allow coolant flow, with a cooler located at the second end. The sixth pipeline has its first end connected to the first pipeline at the junction of the first and second pipelines, and its second end connected to the cooler to selectively allow coolant flow; and The seventh pipeline has its first end connected to the third pipeline at the junction of the third and fourth pipelines, and its second end connected to the cooler to selectively allow coolant to flow.

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