CN117002222A - Thermal management system, control method thereof and vehicle - Google Patents

Thermal management system, control method thereof and vehicle Download PDF

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Publication number
CN117002222A
CN117002222A CN202210475920.3A CN202210475920A CN117002222A CN 117002222 A CN117002222 A CN 117002222A CN 202210475920 A CN202210475920 A CN 202210475920A CN 117002222 A CN117002222 A CN 117002222A
Authority
CN
China
Prior art keywords
heat exchanger
heat
battery pack
vehicle
heat exchange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210475920.3A
Other languages
Chinese (zh)
Inventor
廉玉波
凌和平
翟震
闫磊
谢晋跃
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BYD Co Ltd
Original Assignee
BYD Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Priority to CN202210475920.3A priority Critical patent/CN117002222A/en
Priority to PCT/CN2023/091486 priority patent/WO2023208175A1/en
Publication of CN117002222A publication Critical patent/CN117002222A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
    • B60H1/143—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/425—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Abstract

The invention discloses a thermal management system, a control method thereof and a vehicle with the thermal management system, wherein the thermal management system comprises: the heat exchange circuits each comprise a heat pump device, a heat absorption heat exchanger and a heat supply heat exchanger which are sequentially connected in series, and when the number of the heat exchange circuits is multiple, the heat pump devices are shared by the heat exchange circuits, the heat absorption heat exchanger comprises at least one of an in-vehicle heat exchanger and a battery pack heat exchanger, and the heat exchange circuits are used for realizing in-vehicle heating or battery pack heating; the valve assembly is used for realizing the on-off of each heat exchange loop; when the heat absorption heat exchanger is an in-vehicle heat exchanger, the heat supply heat exchanger comprises at least one of a battery pack heat exchanger, an out-vehicle heat exchanger and a motor electric control assembly heat exchanger; when the heat absorption heat exchanger is a battery pack heat exchanger, the heat supply heat exchanger comprises at least one of an external heat exchanger and a motor electric control assembly heat exchanger. The system has the advantages of small occupied space, low realization cost and high heat utilization rate.

Description

Thermal management system, control method thereof and vehicle
Technical Field
The invention relates to the technical field of vehicles, in particular to a thermal management system, a control method thereof and a vehicle.
Background
Under the low-temperature environment, the heating requirement in the passenger cabin is increased, and the pure electric vehicle cannot utilize the waste heat of the engine to supply heat to the passenger cabin because the pure electric vehicle does not have the engine. Therefore, the solution is to configure electric heating, the heating rate of the solution is high, but the power consumption is high, the driving range of the pure electric vehicle is affected, and meanwhile, the cost is increased, so that the popularization of the electric vehicle is not facilitated; the other solution is to use a heat pump system, and the heat pump system can reduce the heating power consumption by absorbing heat in the environment, thereby being beneficial to improving the driving range of the pure electric vehicle at low temperature, but the heating effect is obviously reduced in the environment with lower temperature, and other heat sources need to be additionally searched for heat absorption of the heat pump system so as to improve the performance of the heat pump system.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present invention is to provide a thermal management system that occupies a small space, is low in implementation cost, has a high heat utilization rate, and has high work flexibility.
A second object of the present invention is to provide a control method of a thermal management system.
A third object of the present invention is to propose a vehicle.
To achieve the above object, a first aspect of the present invention provides a thermal management system, comprising: the heat exchange device comprises one or more heat exchange loops, wherein each heat exchange loop comprises a heat pump device, a heat absorption heat exchanger and a heat supply heat exchanger which are sequentially connected in series, when the number of the heat exchange loops is multiple, the heat pump device is shared by the heat exchange loops, the heat absorption heat exchanger comprises at least one of an in-vehicle heat exchanger and a battery pack heat exchanger, and the heat exchange loops are used for realizing in-vehicle heating or battery pack heating; the valve assembly is used for realizing the on-off of each heat exchange loop; when the heat absorption heat exchanger is the in-vehicle heat exchanger, the heat supply heat exchanger comprises at least one of the battery pack heat exchanger, an out-vehicle heat exchanger and a motor electric control assembly heat exchanger; when the heat absorption heat exchanger is the battery pack heat exchanger, the heat supply heat exchanger comprises at least one of the off-vehicle heat exchanger and the motor electric control assembly heat exchanger.
In addition, the thermal management system according to the embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the heat pump device comprises a gas-liquid separator and a compressor connected in series, the compressor being connected close to the input of the heat absorption heat exchanger, the gas-liquid separator being connected close to the output of the heat supply heat exchanger.
According to one embodiment of the invention, the heat absorption heat exchanger comprises an in-vehicle heat exchanger, the heat supply heat exchanger comprises a battery pack heat exchanger, the valve assembly comprises a first electromagnetic valve, a second electromagnetic valve and a third electromagnetic valve, wherein the output end of the heat pump device is connected to the input end of the in-vehicle heat exchanger through the first electromagnetic valve, the output end of the in-vehicle heat exchanger is connected to the first end of the battery pack heat exchanger through the second electromagnetic valve, and the second end of the battery pack heat exchanger is connected to the input end of the heat pump device through the third electromagnetic valve, wherein the first end of the battery pack heat exchanger is the input end, and the second end of the battery pack heat exchanger is the output end.
According to one embodiment of the invention, the heat absorption heat exchanger comprises an in-vehicle heat exchanger, the heat supply heat exchanger comprises an out-vehicle heat exchanger, the valve assembly comprises a first electromagnetic valve and a fourth electromagnetic valve, wherein the output end of the heat pump device is connected to the input end of the in-vehicle heat exchanger through the first electromagnetic valve, the output end of the in-vehicle heat exchanger is connected to the input end of the out-vehicle heat exchanger through the fourth electromagnetic valve, and the output end of the out-vehicle heat exchanger is connected to the input end of the heat pump device.
According to one embodiment of the invention, the heat absorption heat exchanger comprises an in-vehicle heat exchanger, the heat supply heat exchanger comprises a motor electric control assembly heat exchanger, the valve assembly comprises a first electromagnetic valve and a fifth electromagnetic valve, wherein the output end of the heat pump device is connected to the input end of the in-vehicle heat exchanger through the first electromagnetic valve, the output end of the in-vehicle heat exchanger is connected to the input end of the motor electric control assembly heat exchanger through the fifth electromagnetic valve, and the output end of the motor electric control assembly heat exchanger is connected to the input end of the heat pump device.
According to one embodiment of the invention, the heat absorption heat exchanger comprises a battery pack heat exchanger, the heat supply heat exchanger comprises an off-vehicle heat exchanger, the valve assembly comprises a sixth electromagnetic valve and a fourth electromagnetic valve, wherein the output end of the heat pump device is connected to the second end of the battery pack heat exchanger through the sixth electromagnetic valve, the first end of the battery pack heat exchanger is connected to the input end of the off-vehicle heat exchanger through the fourth electromagnetic valve, and the output end of the off-vehicle heat exchanger is connected to the input end of the heat pump device, wherein the first end of the battery pack heat exchanger is the output end, and the second end is the input end.
According to one embodiment of the invention, the heat absorption heat exchanger comprises a battery pack heat exchanger, the heat supply heat exchanger comprises a motor electric control assembly heat exchanger, the valve assembly comprises a sixth electromagnetic valve and a fifth electromagnetic valve, wherein the output end of the heat pump device is connected to the second end of the battery pack heat exchanger through the sixth electromagnetic valve, the first end of the battery pack heat exchanger is connected to the input end of the motor electric control assembly heat exchanger through the fifth electromagnetic valve, and the output end of the motor electric control assembly heat exchanger is connected to the input end of the heat pump device, wherein the first end of the battery pack heat exchanger is the output end, and the second end is the input end.
According to one embodiment of the present invention, the valve assembly includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, and a sixth solenoid valve, wherein an output end of the heat pump device is connected to one end of the first solenoid valve to form a first node, the other end of the first solenoid valve is connected to an input end of the in-vehicle heat exchanger, an output end of the in-vehicle heat exchanger is connected to one end of the second solenoid valve to form a second node, the other end of the second solenoid valve is connected to a first end of the battery pack heat exchanger, the second end of the battery pack heat exchanger is connected to one end of the third solenoid valve to form a third node, and the other end of the third solenoid valve is connected to an input end of the heat pump device; the second node is further connected with one end of the fourth electromagnetic valve and one end of the fifth electromagnetic valve respectively, the other end of the fourth electromagnetic valve is connected to the input end of the heat exchanger outside the vehicle, the output end of the heat exchanger outside the vehicle is connected to the input end of the heat pump device, the other end of the fifth electromagnetic valve is connected to the input end of the motor electric control assembly heat exchanger, the output end of the motor electric control assembly heat exchanger is connected to the input end of the heat pump device, the first node is further connected with one end of the sixth electromagnetic valve, the other end of the sixth electromagnetic valve is connected with the third node, and the first end of the battery pack heat exchanger is further connected with the second node.
According to one embodiment of the invention, the valve assembly further comprises a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, a fifth one-way valve, and a throttle valve, wherein the first one-way valve is connected between the first end of the battery pack heat exchanger and the second node, the first one-way valve being oriented away from the battery Bao Huanre; the second one-way valve is connected between the battery Bao Huanre device and the second electromagnetic valve, and the direction of the second one-way valve points to the battery Bao Huanre device; the third one-way valve is connected between the third electromagnetic valve and the input end of the heat pump device, and the direction of the third one-way valve points to the heat pump device; the fourth one-way valve is connected between the output end of the heat exchanger outside the vehicle and the input end of the heat pump device, and the direction of the fourth one-way valve points to the heat pump device; the fifth one-way valve is connected between the output end of the motor electric control assembly heat exchanger and the input end of the heat pump device, and the direction of the fifth one-way valve points to the heat pump device.
According to one embodiment of the invention, the valve assembly further comprises a throttle valve, one end of the throttle valve is connected with the first one-way valve and the output end of the in-vehicle heat exchanger respectively, and the other end of the throttle valve is connected with the second node.
According to one embodiment of the present invention, the battery pack heat exchanger includes: the heat exchange device comprises a plate heat exchanger, a battery pack liquid cooling heat exchange plate and a water pump, wherein the plate heat exchanger is provided with a first flow path and a second flow path, the first flow path is connected to a corresponding heat exchange loop, and the second flow path is connected with the battery pack liquid cooling heat exchange plate and the water pump in series; or the battery pack direct cooling and direct heating heat exchange plate is connected to the corresponding heat exchange loop.
According to one embodiment of the invention, the system further comprises a battery pack self-heating device comprising: the battery pack comprises a first battery cell group and a second battery cell group which are connected in series; the motor electric control assembly comprises a motor and a motor controller, positive and negative buses of the motor controller are respectively and correspondingly connected with the positive and negative poles of the battery pack, one ends of three-phase coils of the motor are respectively and correspondingly connected to midpoints of three-phase bridge arms of the motor controller, and the other ends of the three-phase coils are respectively and correspondingly connected to serial connection points of the first battery cell group and the second battery cell group.
To achieve the above object, an embodiment of a second aspect of the present invention provides a method for controlling a thermal management system, the method being used in the thermal management system set forth in the embodiment of the first aspect of the present invention, the method including: receiving a thermal management instruction; and controlling the thermal management system according to the thermal management instruction to realize heating in the vehicle and/or heating of the battery pack.
In addition, the control method of the thermal management system according to the embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the present invention, the controlling the thermal management system according to the thermal management command to achieve heating in a vehicle and/or heating a battery pack includes: controlling a compressor in the heat pump device to be started; if the thermal management instruction is an in-vehicle heating instruction, determining a first target heat exchange loop according to the temperature of the outside of the vehicle, the temperature of an electric control assembly of the motor and the temperature of a battery pack, and controlling the target heat exchange loop to work so as to realize in-vehicle heating; and if the thermal management instruction is a battery pack heating instruction, determining a second target heat exchange loop according to the outside environment temperature of the vehicle, and controlling the second target heat exchange loop to work so as to realize battery pack heating.
According to one embodiment of the present invention, the determining the first target heat exchange loop according to the vehicle exterior environment temperature, the motor electric control assembly temperature and the battery pack temperature includes: if the temperature of the outside environment of the vehicle is greater than or equal to a first preset temperature, determining that the first target heat exchange loop is a first heat exchange loop, wherein the first heat exchange loop is a heat exchange loop in which the heat exchanger in the vehicle and the heat exchanger outside the vehicle are located; and if the temperature of the outside environment of the vehicle is smaller than the first preset temperature or the temperature of the outside environment of the vehicle is smaller than a second preset temperature in the working process of the first heat exchange loop, determining the first target heat exchange loop according to the temperature of the electric control assembly of the motor and the temperature of the battery pack, wherein the second preset temperature is smaller than the first preset temperature.
According to one embodiment of the present invention, the determining the first target heat exchange circuit according to the motor electric control assembly temperature and the battery pack temperature includes: if the temperature of the motor electric control assembly is higher than a third preset temperature, determining that the first target heat exchange loop is a second heat exchange loop, wherein the second heat exchange loop is a heat exchange loop where the in-vehicle heat exchanger and the motor electric control assembly heat exchanger are located; if the temperature of the motor electric control assembly is smaller than the third preset temperature or in the working process of the second heat exchange loop, the temperature of the motor electric control assembly is smaller than a fourth preset temperature, and the first target heat exchange loop is determined according to the temperature of the battery pack, wherein the fourth preset temperature is smaller than the third preset temperature.
According to one embodiment of the present invention, the determining the first target heat exchange circuit according to the battery pack temperature includes: if the temperature of the battery pack is greater than or equal to a fifth preset temperature, determining that the target heat exchange loop is a third heat exchange loop, wherein the third heat exchange loop is a heat exchange loop where the in-vehicle heat exchanger and the battery pack heat exchanger are located; if the temperature of the battery pack is smaller than the fifth preset temperature or the temperature of the battery pack is smaller than a sixth preset temperature in the working process of the third heat exchange loop, the first target heat exchange loop is determined to comprise the second heat exchange loop and the third heat exchange loop, wherein the sixth preset temperature is smaller than the fifth preset temperature.
According to one embodiment of the invention, the thermal management system further comprises a battery pack self-heating device, the method further comprising: if the low temperature of the battery pack is smaller than the fifth preset temperature or the temperature of the battery pack is smaller than the sixth preset temperature in the working process of the third heat exchange loop, controlling the battery self-heating device to work; if the temperature of the battery pack is smaller than a seventh preset temperature and the temperature of the motor electric control assembly is greater than or equal to the third preset temperature in the process of simultaneously working the second heat exchange loop and the third heat exchange loop, the battery pack self-heating device, the second heat exchange loop and the third heat exchange loop are controlled to stop working, and the step of determining the first target heat exchange loop according to the temperature of the motor electric control assembly and the temperature of the battery pack is returned.
According to one embodiment of the invention, the determining the second target heat exchange circuit according to the vehicle exterior environment temperature includes: if the temperature of the outside environment of the vehicle is greater than or equal to an eighth preset temperature, determining that the second target heat exchange loop is a fourth heat exchange loop, wherein the fourth heat exchange loop is a heat exchange loop in which the battery pack heat exchanger and the outside heat exchanger are located; and if the temperature of the outside environment of the vehicle is smaller than the eighth preset temperature, or in the working process of the fourth heat exchange loop, the temperature of the outside environment of the vehicle is smaller than the ninth preset temperature, and the second target heat exchange loop is determined to be a fifth heat exchange loop, wherein the ninth preset temperature is smaller than the eighth preset temperature, and the fifth heat exchange loop is a heat exchange loop where the battery pack heat exchanger and the motor electric control assembly heat exchanger are located.
According to one embodiment of the invention, the thermal management system further comprises a battery pack self-heating device, the method further comprising: and if the temperature of the motor electric control assembly is smaller than or equal to the tenth preset temperature, or in the working process of the fifth heat exchange loop, controlling the battery pack self-heating device to work.
To achieve the above object, an embodiment of a third aspect of the present invention proposes a vehicle comprising the thermal management system proposed in the embodiment of the first aspect of the present invention.
According to the heat management system, the control method thereof and the vehicle, disclosed by the embodiment of the invention, the heat absorption heat exchanger and the heat supply heat exchanger are arranged on the heat exchange loop, so that the heat management system can exchange heat under the condition that other heating sources are not needed, the energy utilization rate at low temperature is improved, the energy consumption is reduced, the occupied space of the system is reduced, and the realizable cost is reduced.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic diagram of a thermal management system of a heat exchange circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a thermal management system of a plurality of heat exchange circuits according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the thermal management system of one example of the invention;
FIG. 4 is a schematic diagram of a partial structure of a thermal management system according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a partial structure of a thermal management system according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a partial structure of a thermal management system according to an embodiment of the invention;
FIG. 7 is a schematic diagram of a partial structure of a thermal management system according to an embodiment of the invention;
FIG. 8 is a schematic diagram of a partial structure of a thermal management system according to an embodiment of the invention;
FIG. 9 is a schematic diagram of a thermal management system according to an embodiment of the invention;
fig. 10 is a schematic view of the structure of a battery pack heat exchanger according to an example of the present invention;
FIG. 11 is a schematic view of a battery pack heat exchanger according to another example of the invention;
FIG. 12 is a schematic diagram of a thermal management system according to another embodiment of the invention;
fig. 13 is a schematic view of a structure of a self-heating device for a battery pack according to an example of the present invention;
FIG. 14 is a flow chart of a method of controlling a thermal management system according to an embodiment of the invention;
FIG. 15 is a flowchart of step S1402 in a control method of a thermal management system according to an embodiment of the present invention;
fig. 16 is a schematic structural view of a vehicle according to an embodiment of the present invention.
Reference numerals illustrate:
1-thermal management system, 2-heat exchange circuit, 21-heat pump device, 212-gas-liquid separator, 211-compressor, 22-heat absorption heat exchanger, 23-heat supply heat exchanger, 221-in-vehicle heat exchanger, 222-battery Bao Huanre ware, 2221-plate heat exchanger, 2222-battery pack liquid cooling heat exchange plate, 2223-water pump, 2224-battery pack direct cooling direct heating heat exchange plate, 223-off-vehicle heat exchanger, 224-motor electric control assembly heat exchanger, 3-valve assembly, 31-first solenoid valve, 32-sixth solenoid valve, 33-second solenoid valve, 34-fourth solenoid valve, 35-fifth solenoid valve, 36-third solenoid valve, 301-first check valve, 302-second check valve, 303-third check valve, 304-fourth check valve, 305-fifth check valve, 306-throttle valve, 4-battery pack self-heating device, 41-battery pack, 411-first battery pack, 412-second battery pack, 42-motor electric control assembly, 421-motor electric motor, 422-motor controller, 5-vehicle.
Detailed Description
In order to solve the heating problem in the vehicle, a thermal management system, a control method thereof and a vehicle having the thermal management system are disclosed in the related art, the thermal management system comprising: the heat pump circulation device comprises a compressor, a condenser, an evaporator, an outdoor heat exchanger and a throttling device; the compressor, the condenser, the evaporator, the outdoor heat exchanger and the throttling device are located in the same heat pump cycle liquid flow loop; a warm air core having a warm air core liquid flow path; a first circulation pump in fluid flow communication with the warm air core; and a heating device having a heating liquid flow path connected in series with the first circulation pump and the warm air core liquid flow path to constitute a first circulation liquid flow loop. According to the thermal management system provided by the invention, the heating speed of air in the air conditioner during heating is increased, and the air heating speed is high, so that the use comfort of a user is improved. However, it is pointed out in the art that adding a heating device, such as a fuel heater, a fuel filler, a fuel pipeline, etc. to a vehicle system, and an electric heater, and a high-voltage system power distribution, including a high-voltage wire harness, a high-voltage safety, a high-voltage relay, etc., to a vehicle system, both schemes of adding a heating device occupy a vehicle layout space, and increase costs.
In order to solve the problems of large occupation of vehicle arrangement space and high realization cost of the thermal management system provided by the related art, the invention provides the thermal management system, the battery pack self-heating device is used for triggering the battery to self-heat, so that the battery pack and the motor electric control assembly generate heat, and the structure of the thermal management system is optimized, so that the heat generated by the battery pack and the motor electric control is provided for the passenger cabin for heating by using the heat exchanger, the heating performance of the system under the condition of low ambient temperature is supplemented, other heating sources are not needed, the occupied vehicle arrangement space is small, and the cost is low.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The thermal management system, the control method thereof and the vehicle according to the embodiment of the present invention are described below with reference to fig. 1 to 16 and specific embodiments.
FIG. 1 is a schematic diagram of a thermal management system of a heat exchange circuit according to one embodiment of the present invention.
As shown in fig. 1, the thermal management system 1 includes: a heat exchange circuit 2 and a valve assembly 3.
FIG. 2 is a schematic diagram of a thermal management system of a heat exchange circuit according to another embodiment of the present invention.
As shown in fig. 1, the thermal management system 1 includes: a plurality of heat exchange circuits 2 and a valve assembly 3.
Wherein, referring to fig. 1, 2, each heat exchange circuit 2 comprises a heat pump device 21, a heat absorption heat exchanger 22 and a heat supply heat exchanger 23 connected in series in sequence. Wherein heat absorption and heat supply are opposite, the heat absorption heat exchanger 22 refers to a heat exchanger that absorbs heat from the outside, and the heat supply heat exchanger 23 refers to a heat exchanger that provides heat to the outside.
Referring to fig. 2, when there are a plurality of heat exchange circuits 2, the heat pump device 21 is shared by the plurality of heat exchange circuits 2.
Wherein the heat absorption heat exchanger 22 includes at least one of an in-vehicle heat exchanger 221 and a battery pack heat exchanger 222.
In some implementations, when the heat absorption heat exchanger 22 is an in-vehicle heat exchanger 221, the heat supply heat exchanger 23 includes at least one of a battery pack heat exchanger 222, an off-vehicle heat exchanger 223, and a motor electric control assembly heat exchanger 224. In this implementation, the heat exchange circuit 2 is used to achieve heating of the vehicle interior.
In other implementations, when the heat absorption heat exchanger 22 is a battery pack heat exchanger 222, the heat supply heat exchanger 23 includes at least one of an off-board heat exchanger 223, a motor electric control assembly heat exchanger 224. In this implementation, the heat exchange circuit 2 is used to effect pack heating.
It should be understood that when the heat absorption heat exchanger 22 is the in-vehicle heat exchanger 221, it is illustrated that the heat management system 1 can achieve in-vehicle heating, and at least one of the battery pack heat exchanger 222, the out-vehicle heat exchanger 223, and the motor electric control assembly heat exchanger 224 can be selected as the heat supply heat exchanger 23 according to actual situations, and heat is supplied to the in-vehicle heat exchanger 221 through the heat exchange loop 2, so as to achieve in-vehicle heating; correspondingly, when the heat absorption heat exchanger 22 is the battery pack heat exchanger 222, it is illustrated that the heat management system 1 can realize battery pack heating, and at least one of the external heat exchanger 223 and the motor electric control assembly heat exchanger 224 can be selected as the heat supply heat exchanger 23 according to practical situations, and heat is provided for the battery pack heat exchanger 222 through the heat exchange loop 2, so as to realize battery pack heating. The heat exchange principle or process is specifically described in the following embodiments.
In an embodiment of the present invention, the valve assembly 3 in the thermal management system 1 is used to switch on and off each heat exchange circuit 2.
It should be noted that when there are multiple heat exchange circuits 2, the selection conditions of the heat absorption heat exchanger 22 and the heat supply heat exchanger 23 may be different according to different heat exchange conditions, that is, the on-off conditions of the multiple heat exchange circuits 2 may be different under different heat exchange requirements, and in this embodiment, the valve assembly 3 may be used to implement on-off of each heat exchange circuit 2.
Therefore, the invention provides a heat management system 1 which is different from the related art, and the heat pump device 21, the heat absorption heat exchanger 22 and the heat supply heat exchanger 23 which are connected in series are arranged on the heat exchange loop 2, so that the heat absorbed by the heat pump device 21 from the heat supply heat exchanger 23 is transmitted to the heat absorption heat exchanger 22, and the heat exchange can be completed without other heat generating sources, thereby reducing the realization cost of the system and the occupied vehicle arrangement space; meanwhile, the valve component 3 is arranged to realize the on-off of each heat exchange loop 2, so as to realize heating in the vehicle and/or heating of a battery pack, and improve the working flexibility.
FIG. 3 is a schematic diagram of the thermal management system of one example of the invention.
As an example, as shown in fig. 3, the heat pump apparatus 21 may include a gas-liquid separator 212 and a compressor 211 connected in series.
Specifically, referring to fig. 3, a compressor 211 is connected near an input end of the heat absorption heat exchanger 22, and a gas-liquid separator 212 is connected near an output end of the heat supply heat exchanger 23.
In practical applications, the gas-liquid separator 212 can recover or purify the gas containing a small amount of condensate, and in this example, by connecting the gas-liquid separator 212 and the compressor 211 in series, the compressor 211 can be prevented from being hit by liquid, and meanwhile, excessive refrigerant can be prevented from diluting the oil of the compressor 211.
The compressor 211 serves as a core component of the heat pump device 21, and is configured to compress the sucked low-temperature or low-pressure refrigerant fluid vapor to raise the temperature and pressure thereof, and output the same to other heat management components.
FIG. 4 is a schematic partial structure of a thermal management system according to a first embodiment of the present invention.
In some embodiments of the present invention, the heat absorption heat exchanger 22 comprises an in-vehicle heat exchanger 221, the heat supply heat exchanger 23 comprises a battery pack heat exchanger 222, and the valve assembly 3 comprises a first solenoid valve 31, a second solenoid valve 33, and a third solenoid valve 36.
Referring to fig. 4, the output end of the heat pump device 21 may be connected to the input end of the in-vehicle heat exchanger 221 through the first solenoid valve 31, the output end of the in-vehicle heat exchanger 221 is connected to the first end of the battery pack heat exchanger 222 through the second solenoid valve 33, the second end of the battery Bao Huanre device 222 is connected to the input end of the heat pump device 21 through the third solenoid valve 36, wherein the first end of the battery Bao Huanre device 222 is the input end, and the second end of the battery Bao Huanre device 222 is the output end.
FIG. 5 is a schematic partial structure of a thermal management system according to a second embodiment of the present invention.
In some embodiments of the invention, the heat absorption heat exchanger 22 comprises an in-vehicle heat exchanger 221, the heat supply heat exchanger 23 comprises an off-vehicle heat exchanger 223, and the valve assembly 3 comprises a first solenoid valve 31, a fourth solenoid valve 34.
Specifically, referring to fig. 5, the output terminal of the heat pump device 21 is connected to the input terminal of the in-vehicle heat exchanger 221 through the first solenoid valve 31, the output terminal of the in-vehicle heat exchanger 221 is connected to the input terminal of the out-of-vehicle heat exchanger 223 through the fourth solenoid valve 34, and the output terminal of the out-of-vehicle heat exchanger 223 is connected to the input terminal of the heat pump device 21.
FIG. 6 is a schematic partial structure of a thermal management system according to a third embodiment of the present invention.
In some embodiments of the invention, the heat absorption heat exchanger 22 comprises an in-vehicle heat exchanger 221, the heat supply heat exchanger 23 comprises a motor electric control assembly heat exchanger 224, and the valve assembly 3 comprises a first solenoid valve 31 and a fifth solenoid valve 35.
Specifically, referring to fig. 6, the output end of the heat pump device 21 is connected to the input end of the in-vehicle heat exchanger 221 through the first solenoid valve 31, the output end of the in-vehicle heat exchanger 221 is connected to the input end of the motor electric control assembly heat exchanger 224 through the fifth solenoid valve 35, and the output end of the motor electric control assembly heat exchanger 224 is connected to the input end of the heat pump device 21.
Thus, when the heat absorption heat exchanger 22 includes the in-vehicle heat exchanger 221, in order to satisfy the heat absorption requirement of the in-vehicle heat exchanger 221, at least one of the battery pack heat exchanger 222, the out-vehicle heat exchanger 223, and the motor electric control assembly heat exchanger 224 is determined as the heat supply heat exchanger 23, at least one of the heat of the out-vehicle heat exchanger 223, the heat of the motor electric control assembly heat exchanger 224, or the heat of the battery pack heat exchanger 222 is absorbed, and released in the vehicle, the in-vehicle heating can be realized without other heating sources, the realizable cost is reduced, and the occupancy rate of the vehicle layout space is also reduced.
FIG. 7 is a schematic diagram of a thermal management system according to a fourth embodiment of the present invention.
In some embodiments of the invention, the heat absorption heat exchanger 22 comprises a battery pack heat exchanger 222, the heat supply heat exchanger 23 comprises an off-board heat exchanger 223, and the valve assembly 3 comprises a sixth solenoid valve 32, a fourth solenoid valve 34.
Specifically, referring to fig. 7, the output terminal of the heat pump device 21 is connected to the second terminal of the battery pack heat exchanger 222 through the sixth solenoid valve 32, the first terminal of the battery Bao Huanre heat exchanger 222 is connected to the input terminal of the off-vehicle heat exchanger 223 through the fourth solenoid valve 34, and the output terminal of the off-vehicle heat exchanger 223 is connected to the input terminal of the heat pump device 21, wherein the first terminal of the battery Bao Huanre heat exchanger 222 is the output terminal and the second terminal is the input terminal.
It is known that the battery pack is composed of a large number of battery cells, and the battery cells are lithium batteries, and the temperature has a great influence on the performance of such batteries, and particularly in an environment where the temperature is very low, the discharging process and the charging process of the battery have great damage to the battery, so that it is very necessary to properly heat the battery pack in a low-temperature environment. For example, for an electric car in real life, when the ambient temperature is very low (e.g., below 0 ℃), the car may be started after the battery pack is properly heated.
FIG. 8 is a schematic partial structure of a thermal management system according to a fifth embodiment of the invention.
In some embodiments of the invention, the heat absorption heat exchanger 22 comprises a battery pack heat exchanger 222, the heat supply heat exchanger 23 comprises a motor electric control assembly heat exchanger 224, and the valve assembly 3 comprises a sixth solenoid valve 32 and a fifth solenoid valve 35.
Specifically, referring to fig. 8, the output end of the heat pump device 21 is connected to the second end of the battery pack heat exchanger 222 through the sixth solenoid valve 32, the first end of the battery Bao Huanre device 222 is connected to the input end of the motor electric control assembly heat exchanger 224 through the fifth solenoid valve 35, and the output end of the motor electric control assembly heat exchanger 224 is connected to the input end of the heat pump device 21, wherein the first end of the battery Bao Huanre device 222 is the output end, and the second end is the input end.
Therefore, when the heat absorption heat exchanger 22 comprises the battery pack heat exchanger 222, at least one of the external heat exchanger 223 and the motor electric control assembly heat exchanger 224 is determined as the heat supply heat exchanger 23 to absorb heat of the external heat exchanger 223 or at least one of heat of the motor electric control assembly heat exchanger 224 and provide the heat to the battery Bao Huanre heat exchanger 222 so as to realize heating of the battery pack without other heating sources, thereby improving the energy utilization rate of the whole vehicle at low temperature; for the pure electric vehicle in practical application, the driving mileage of the pure electric vehicle at low temperature can be improved when the heat of the battery pack is enough, and the riding experience is ensured.
FIG. 9 is a schematic diagram of a thermal management system according to an embodiment of the invention.
As shown in fig. 9, according to some embodiments of the invention, the valve assembly 3 may comprise: the first solenoid valve 31, the second solenoid valve 33, the third solenoid valve 36, the fourth solenoid valve 34, the fifth solenoid valve 35, and the sixth solenoid valve 32.
Specifically, as shown in fig. 4 to 9, the output end of the heat pump device 21 is connected to one end of the first solenoid valve 31 to form a first node, the other end of the first solenoid valve 31 is connected to the input end of the in-vehicle heat exchanger 221, the output end of the in-vehicle heat exchanger 221 is connected to one end of the second solenoid valve 33 to form a second node, the other end of the second solenoid valve 33 is connected to the first end of the battery pack heat exchanger 222, the second end of the battery Bao Huanre device 222 is connected to one end of the third solenoid valve 36 to form a third node, and the other end of the third solenoid valve 36 is connected to the input end of the heat pump device 21.
Further, the second node is further connected to one end of the fourth electromagnetic valve 34 and one end of the fifth electromagnetic valve 35, respectively, the other end of the fourth electromagnetic valve 34 is connected to an input end of the external heat exchanger 223, an output end of the external heat exchanger 223 is connected to an input end of the heat pump device 21, the other end of the fifth electromagnetic valve 35 is connected to an input end of the motor electric control assembly heat exchanger 224, an output end of the motor electric control assembly heat exchanger 224 is connected to an input end of the heat pump device 21, the first node is further connected to one end of the sixth electromagnetic valve 32, the other end of the sixth electromagnetic valve 32 is connected to the third node, and the first end of the battery Bao Huanre device 222 is further connected to the second node.
Therefore, the heat management system 1 can realize heating in the vehicle through the three heat exchange loops 2, and can realize heating of the battery pack through the two heat exchange loops 2, and each heat exchange loop 2 shares the heat pump device 21, multiplexes the external heat exchanger 223 and the motor electric control assembly heat exchanger 224, does not need to additionally increase other heat sources, and has small occupied space and low cost.
As an example, as shown in fig. 9, the valve assembly 3 may further include: a first check valve 301, a second check valve 302, a third check valve 303, a fourth check valve 304, a fifth check valve 305, and a throttle valve 306.
Specifically, referring to fig. 9, a first check valve 301 is connected between a first end of the battery pack heat exchanger 222 and a second node, the first check valve 301 being oriented away from the battery pack heat exchanger 222; the second check valve 302 is connected between the battery pack heat exchanger 222 and the second electromagnetic valve 33, and the direction of the second check valve 302 points to the battery pack heat exchanger 222; the third check valve 303 is connected between the third electromagnetic valve 36 and the input end of the heat pump device 21, and the direction of the third check valve 303 points to the heat pump device 21; the fourth check valve 304 is connected between the output end of the off-vehicle heat exchanger 223 and the input end of the heat pump device 21, and the direction of the fourth check valve 304 is directed to the heat pump device 21; the fifth one-way valve 305 is connected between the output of the motor electric control assembly heat exchanger 224 and the input of the heat pump device 21, the direction of the fifth one-way valve 305 pointing towards the heat pump device 21.
In this example, a one-way valve is used to prevent reverse flow of the oil flow and/or to prevent reverse flow of the compressed air.
As a possible embodiment, referring to fig. 9, one end of the throttle valve 306 is connected to the first check valve 301 and the output end of the in-vehicle heat exchanger 221, respectively, and the other end of the throttle valve 306 is connected to the second node.
In this embodiment, a throttle valve 306 is used to control the flow of fluid in each heat exchange circuit 2 to achieve control of how much, how fast, etc. heat is transferred.
Fig. 10 is a schematic view of the structure of a battery pack heat exchanger according to an example of the present invention.
As shown in fig. 10, as one example, the battery Bao Huanre device 222 can include: a plate heat exchanger 2221, a battery pack liquid-cooled heat exchanger plate 2222, and a water pump 2223.
The plate heat exchanger 2221 has a first flow path connected to the corresponding heat exchange circuit 2, and a second flow path connected in series with the battery pack liquid-cooled heat exchange plate 2222 and the water pump 2223.
Optionally, in practical application, in order to facilitate control of the thermal management system 1, components such as a temperature sensor and a flow sensor are additionally arranged on the flow path, so that the temperature and the flow of the refrigerant on the corresponding flow path can be monitored and adjusted at any time.
Fig. 11 is a schematic view of a structure of a battery pack heat exchanger according to another example of the present invention.
As another example, as shown in fig. 11, the battery Bao Huanre device 222 can include: the battery pack directly cools and directly heats the heat exchange plate 2224.
Specifically, the battery pack direct-cooling and direct-heating heat exchange plates 2224 are connected to the corresponding heat exchange circuits 2.
Optionally, for convenience in controlling the thermal management system 1, a throttle valve, a pressure sensor, a temperature sensor, and the like may be further added to the flow path.
Therefore, the thermal management system 1 provided in the embodiment of the invention not only can be applied to a battery pack liquid cooling system, but also can be applied to a battery pack direct cooling and direct heating system, and different carrying modes can be selected according to different actual conditions, so that the thermal management system has stronger applicability.
FIG. 12 is a schematic structural diagram of a thermal management system according to another embodiment of the present invention.
In some embodiments of the present invention, as shown in fig. 12, the thermal management system 1 may further include: the battery pack is self-heating device 4.
Fig. 13 is a schematic view showing the structure of a self-heating device for a battery pack according to an example of the present invention.
As an example, referring to fig. 13, the battery pack self-heating device 4 may include: battery pack 41, motor electric control assembly 42.
Wherein, the battery pack 41 may include a first cell group 411 and a second cell group 412 connected in series; the motor electric control assembly 42 may include a motor 421 and a motor controller 422.
Specifically, as shown in fig. 13, positive and negative buses of the motor controller 422 are respectively connected with positive and negative poles of the battery pack 41, one ends of three-phase coils of the motor 421 are respectively connected to midpoints of three-phase bridge arms of the motor controller 422, and the other ends of the three-phase coils are respectively connected to serial points of the first battery cell group 411 and the second battery cell group 412.
In the battery pack self-heating device 4, when the motor controller 422 controls the switching frequency of the three-phase bridge arm of the motor controller 422 according to a certain frequency, a high-frequency ac current flows through the connection harness, and the first battery cell group 411 and the second battery cell group 412 in the battery pack 41 can perform high-frequency oscillation charge and discharge to trigger the battery pack 41 to self-heat.
Meanwhile, in some embodiments, a part of the heat generated by the self-heating of the battery pack 41 may be transferred to the battery pack liquid-cooled heat exchange plate 2222 or the battery pack direct-cooled heat exchange plate 2224 proposed in the above examples of the present invention through the heat conductive structure.
For example, the battery pack liquid-cooled heat exchange plate 2222 may be attached to the battery cell group through a heat conducting structure (e.g., a heat conducting structural adhesive or a heat conducting gel), so as to realize heat exchange between the battery pack liquid-cooled heat exchange plate 2222 and the battery cell group; or, the direct-cooling and direct-heating heat exchange plate 2224 of the battery pack can be attached to the battery cell group through a heat conducting structure, so that heat exchange between the direct-cooling and direct-heating heat exchange plate 2224 of the battery pack and the battery cell group is realized.
Therefore, the battery pack self-heating device 4 can trigger the battery pack 41 to self-heat in the working process, and can realize the uniform temperature among different battery cell groups in the battery pack 41 and between different battery cells in the battery cell groups, thereby improving the balance of heat exchange on the heat exchange circuit 2.
Further, in some realizable modes, since the flowing high-frequency alternating current can pass through the three-phase bridge arm of the motor 421 and the motor controller 422, the motor 421 and the motor controller 422 can generate certain heat, the heat generated by the motor 421 and the motor controller 422 can be transferred to the motor electric control assembly heat exchanger 224 through the cooling loop of the motor electric control assembly 42, when the passenger cabin in the vehicle has heating requirements, the heat pump device 21 can absorb heat from the motor electric control assembly heat exchanger 224 to transfer the waste heat generated in the operation process of the motor electric control assembly 42 to the passenger cabin in the vehicle, so as to realize heating in the vehicle, make up the defect of insufficient heat absorption capacity of the passenger cabin in the vehicle under the low-temperature environment of the heat management system 1 in the related art, be beneficial to improving the energy utilization rate of the vehicle under the low temperature, reduce the energy consumption, and be beneficial to improving the continuous driving mileage of the pure electric vehicle in the actual life.
Meanwhile, as the cooling capacity of the motor electric control assembly 42 is increased, the overcurrent capacity is improved, the current in the heating process of the battery pack self-heating device 4 is improved, and the self-heating energy efficiency of the battery pack is improved; and under the condition of the same self-heating current, the overcurrent area of the motor electric control assembly 42 can be correspondingly reduced due to the increase of the cooling capacity of the motor electric control assembly 42, so that the weight of the motor electric control assembly 42 is reduced, and the implementation cost of the thermal management system 1 is further reduced.
In addition, in some embodiments, when the temperature of the electric motor control assembly 42 is higher and more waste heat is found through detection in a low-temperature environment, even if the battery pack 41 has no heating requirement at the moment, the thermal management system 1 provided in the embodiment of the invention can intelligently judge the temperature of the battery pack 41, and under the condition that the temperature of the battery pack 41 is not too high, the waste heat generated in the operation of the electric motor control assembly 42 is converted into the battery pack to reheat the battery pack 41, so that the temperature of the battery pack 41 is improved, the charge and discharge performance of the battery pack 41 at low temperature is improved, the heat source is reasonably distributed, the energy consumption of the whole vehicle is reduced, and the driving range of the electric vehicle in real life can be further improved.
In summary, in the thermal management system 1 provided in the embodiment of the invention, by arranging the battery pack heat exchanger 222, the external heat exchanger 223 and the motor electric control assembly heat exchanger 224, heating in the vehicle and/or heating of the battery pack can be realized under the condition that other heating sources are not needed, so that the energy utilization rate of the whole vehicle at low temperature is improved, the energy consumption is reduced, and the realizable cost of the system is also reduced; meanwhile, the battery pack heat exchanger 222 provided by the embodiment of the invention can be applied to a battery pack liquid cooling system and also can be applied to a battery pack direct cooling and direct heating system, so that the thermal management system 1 has strong applicability. In addition, by arranging the battery pack self-heating device 4, the balance of heat exchange on the heat exchange loop 2 is ensured while the battery pack self-heating is triggered, and the working safety and reliability of the thermal management system 1 are further improved.
Further, the present invention provides a control method of a thermal management system, which can be used in the thermal management system as provided in the above embodiment of the present invention.
FIG. 14 is a flow chart of a method of controlling a thermal management system according to an embodiment of the invention.
As shown in fig. 14, the control method of the thermal management system may include:
s1401, a thermal management instruction is received.
S1402, controlling the thermal management system according to the thermal management instruction to realize heating in the vehicle and/or heating the battery pack.
Specifically, when the received thermal management instructions are different, the control method for the thermal management system is different. For example, when the thermal management instruction is in-vehicle heating, the in-vehicle heating can be realized through a corresponding heat exchange loop in the thermal management system; for another example, when the thermal management instruction is to heat the battery pack, the battery pack can be heated through a corresponding heat exchange loop in the thermal management system; for another example, when the thermal management instruction is heating in the vehicle and heating the battery pack, the heating in the vehicle and the heating of the battery pack can be realized through corresponding heat exchange loops in the thermal management system, and the heating of the battery pack can also be realized through a self-heating device of the battery pack in the thermal management system. Therefore, various heat exchange and heating requirements can be met.
Fig. 15 is a flowchart of step S1402 in the control method of the thermal management system according to the embodiment of the present invention.
As shown in fig. 15, controlling the thermal management system according to the thermal management instructions to achieve heating of the vehicle interior and/or heating of the battery pack may include:
s1501, controlling the compressor in the heat pump apparatus to be turned on.
S1502, if the thermal management instruction is an in-vehicle heating instruction, determining a first target heat exchange loop according to the in-vehicle environment temperature, the motor electric control assembly temperature and the battery pack temperature, and controlling the target heat exchange loop to work so as to realize in-vehicle heating.
In some embodiments, determining the first target heat exchange circuit based on the vehicle exterior environment temperature, the motor electrical control assembly temperature, and the battery pack temperature may include: if the temperature of the outside environment of the vehicle is greater than or equal to the first preset temperature, determining that the first target heat exchange loop is a first heat exchange loop, wherein the first heat exchange loop is a heat exchange loop where the heat exchanger in the vehicle and the heat exchanger outside the vehicle are located.
That is, when the temperature of the outside environment of the vehicle is greater than or equal to the first preset temperature, it is indicated that the condition of the outside environment of the vehicle can meet the heating requirement in the vehicle at the current moment, and the first heat exchange loop (i.e. the heat exchange loop where the heat exchanger in the vehicle and the heat exchanger outside the vehicle are located) is turned on and the other heat exchange loops are turned off by controlling the thermal management system according to the above embodiment of the present invention. Referring to fig. 9, the first and fourth solenoid valves 31, 34 are controlled to be opened and the other solenoid valves are controlled to be closed.
In an exemplary embodiment, when the thermal management instruction is an in-vehicle heating instruction in a low-temperature environment, it is indicated that the in-vehicle passenger compartment has a heat absorption requirement at this time, and when the temperature of the outside environment is detected to be greater than or equal to a first preset temperature and a heating condition is satisfied, the thermal management system of the above embodiment can be controlled to absorb heat in the outside heat exchanger and release the heat in the passenger compartment, thereby satisfying the heat absorption requirement of the in-vehicle passenger compartment, completing the exchange of heat inside and outside the vehicle, and realizing heating in the vehicle.
If the temperature of the outside environment of the vehicle is smaller than a first preset temperature or the temperature of the outside environment of the vehicle is smaller than a second preset temperature in the working process of the first heat exchange loop, determining a first target heat exchange loop according to the temperature of the electric control assembly of the motor and the temperature of the battery pack, wherein the second preset temperature is smaller than the first preset temperature.
That is, when the temperature of the exterior environment of the vehicle is unable to meet or no longer meet the heating requirement in the vehicle, the first target heat exchange circuit can be determined or reselected according to the temperature of the motor electric control assembly and the temperature of the battery pack.
Optionally, the first preset temperature and the second preset temperature are determined according to heat exchange capability actually available to the thermal management system and heating requirements in the vehicle under different environmental temperatures.
As an example, if the temperature of the vehicle exterior environment is greater than or equal to the second preset temperature during the operation of the first heat exchange circuit, it is indicated that the thermal management system can still absorb enough heat from the environment, and at this time, the current solenoid valves (i.e., the first solenoid valve 31 and the fourth solenoid valve 34) are kept open until a heating closing command is received, the compressor is controlled to be closed, the first solenoid valve 31 and the fourth solenoid valve 34 are restored to be closed, and the passenger compartment heating is closed.
In some embodiments, if the vehicle exterior environment temperature is less than a first preset temperature or, during operation of the first heat exchange circuit, the vehicle exterior environment temperature is less than a second preset temperature, determining the first target heat exchange circuit based on the motor electrical control assembly temperature and the battery pack temperature may include: if the temperature of the motor electric control assembly is higher than the third preset temperature, determining that the first target heat exchange loop is a second heat exchange loop, wherein the second heat exchange loop is a heat exchange loop where the heat exchanger in the vehicle and the motor electric control assembly are located.
That is, when the temperature outside the vehicle is less than the first preset temperature or the temperature outside the vehicle is less than the second preset temperature during the working process of the first heat exchange loop, it is indicated that the environment condition outside the vehicle cannot meet the heating requirement in the vehicle at the current moment, but the temperature of the motor electric control assembly is detected to be greater than the third preset temperature, it is indicated that the heat of the motor electric control assembly can meet the heating requirement in the vehicle at the current moment, so that the second heat exchange loop (namely the heat exchange loop where the heat exchanger in the vehicle and the heat exchanger of the motor electric control assembly are located) can be conducted and other heat exchange loops are disconnected by controlling the heat management system of the embodiment of the invention. Referring to fig. 9, the first solenoid valve 31 and the fifth solenoid valve 35 are controlled to be opened, and the other solenoid valves are controlled to be closed.
In an exemplary embodiment, when the thermal management command is an in-vehicle heating command and the temperature of the outside environment of the vehicle does not meet the heating condition in a low-temperature environment, but the temperature of the motor electric control assembly is detected to be higher than the third preset temperature, and when the heating condition is met, the thermal management system of the embodiment can be controlled to absorb heat in the motor electric control assembly and release the heat in the passenger cabin, so that the heat absorption requirement of the passenger cabin is met, and in-vehicle heating is realized.
If the temperature of the motor electric control assembly is smaller than the third preset temperature or in the working process of the second heat exchange loop, the temperature of the motor electric control assembly is smaller than the fourth preset temperature, and the first target heat exchange loop is determined according to the temperature of the battery pack, wherein the fourth preset temperature is smaller than the third preset temperature.
That is, when the temperature outside the vehicle cannot meet or no longer meet the heating requirement in the vehicle, and the temperature of the motor electric control assembly at the current moment cannot meet or no longer meet the heating requirement in the vehicle, the first target heat exchange loop can be determined or reselected according to the temperature of the battery pack.
Optionally, the third preset temperature and the fourth preset temperature are determined according to the heat exchange capability actually exerted by the motor electric control assembly under different environmental temperatures and the heating requirement in the vehicle.
As an example, if the temperature of the motor electric control assembly is greater than or equal to the fourth preset temperature during the operation of the second heat exchange circuit, it is indicated that the thermal management system still can absorb enough heat from the motor electric control assembly, and at this time, the current solenoid valves (i.e., the first solenoid valve 31 and the fifth solenoid valve 35) are kept in the open state until a heating closing command is received, the compressor is controlled to be closed, the first solenoid valve 31 and the fifth solenoid valve 35 are restored to the closed state, and the passenger compartment heating is closed.
In some embodiments, if the temperature of the motor electric control assembly is less than the third preset temperature, or, during operation of the second heat exchange circuit, the temperature of the motor electric control assembly is less than the fourth preset temperature, determining the first target heat exchange circuit according to the battery pack temperature may include: if the temperature of the battery pack is greater than or equal to the fifth preset temperature, determining that the target heat exchange loop is a third heat exchange loop, wherein the third heat exchange loop is a heat exchange loop where the in-vehicle heat exchanger and the battery pack heat exchanger are located.
That is, when the temperature outside the vehicle is less than the first preset temperature, or when the first heat exchange loop works, the temperature outside the vehicle is less than the second preset temperature, which indicates that the environmental condition outside the vehicle cannot meet the heating requirement in the vehicle at the current moment, and meanwhile, the temperature of the motor electric control assembly is less than the third preset temperature, or when the second heat exchange loop works, the temperature of the motor electric control assembly is less than the fourth preset temperature, which indicates that the running heat of the motor electric control assembly cannot meet the heating requirement in the vehicle at the current moment.
However, when the detected temperature of the battery pack (which may be the lowest temperature among the temperatures of the plurality of positions of the battery pack) is greater than or equal to the fifth preset temperature, it is indicated that the temperature of the battery pack itself at the current moment can meet the heating requirement in the vehicle, so that the third heat exchange loop (i.e. the heat exchange loop where the vehicle interior heat exchanger and the battery pack heat exchanger are located) is turned on and other heat exchange loops are turned off by controlling the thermal management system according to the embodiment of the present invention. Referring to fig. 9, the first, second, and third solenoid valves 31, 33, 36 are controlled to be opened, and the other solenoid valves are controlled to be closed.
In an exemplary embodiment, when the thermal management command is an in-vehicle heating command and the temperature of the outside environment and the temperature of the motor electric control assembly do not satisfy the heating condition in the low-temperature environment, but the temperature of the battery pack is detected to be greater than or equal to the fifth preset temperature, and the heating condition is satisfied, the thermal management system of the above embodiment can be controlled to absorb the heat of the battery pack and release the heat in the passenger cabin, thereby satisfying the heat absorption requirement of the passenger cabin and realizing in-vehicle heating.
If the temperature of the battery pack is smaller than the fifth preset temperature or the temperature of the battery pack is smaller than the sixth preset temperature in the working process of the third heat exchange loop, the first target heat exchange loop is determined to comprise the second heat exchange loop and the third heat exchange loop, wherein the sixth preset temperature is smaller than the fifth preset temperature.
Optionally, the fifth preset temperature and the sixth preset temperature need to be determined according to the heat exchange capability of the battery pack heat exchanger actually available and the heating requirement in the vehicle under different environmental temperatures under the condition of ensuring that the charge and discharge performance of the battery pack is enough.
As an example, if the temperature of the battery pack is greater than or equal to the sixth preset temperature during the operation of the third heat exchange circuit, it is indicated that the thermal management system may still absorb enough heat from the battery pack, keep the current solenoid valves (i.e., the first solenoid valve 31, the second solenoid valve 33, and the third solenoid valve 36) open until receiving the heating closing command, control the compressor to close, close the first solenoid valve 31, the second solenoid valve 33, and the third solenoid valve 36, and keep other solenoid valves closed, and if the battery pack heat exchanger is a battery liquid cooling system, control the water pump to stop, and close the passenger cabin for heating.
Therefore, after receiving the in-vehicle heating instruction, according to the current temperature of the outside environment of the vehicle, the temperature of the motor electric control assembly and the temperature of the battery pack, a proper heat exchange loop is selected as a first target heat exchange loop, and the heat exchange loop can be controlled to work after the determination, so that in-vehicle heating is realized.
It should be noted that, in some embodiments, the thermal management system may further include a battery pack self-heating device, and if the battery pack temperature is less than the fifth preset temperature, or during the operation of the third heat exchange circuit, the battery pack temperature is less than the sixth preset temperature, the battery self-heating device is controlled to operate.
In combination with the thermal management system according to the above embodiment of the present invention, since the battery pack self-heating device includes the battery pack and the motor electric control assembly, correspondingly, when the battery pack self-heating device works, the second heat exchange loop (i.e., the heat exchange loop where the heat exchanger in the vehicle and the motor electric control assembly are located) and the third heat exchange loop (i.e., the heat exchange loop where the heat exchanger in the vehicle and the battery pack heat exchanger are located) are both turned on, and the other heat exchange loops are turned off, so that it can be determined that the first target heat exchange loop includes the second heat exchange loop and the third heat exchange loop.
If the temperature of the battery pack is smaller than the seventh preset temperature and the temperature of the motor electric control assembly is greater than or equal to the third preset temperature in the process of simultaneously working the second heat exchange loop and the third heat exchange loop, the battery pack self-heating device, the second heat exchange loop and the third heat exchange loop are controlled to stop working, and the step of determining the first target heat exchange loop according to the temperature of the motor electric control assembly and the temperature of the battery pack is returned.
Optionally, the seventh preset temperature is a battery pack protection temperature, and is used for preventing the battery pack from being over-heated after triggering the battery pack to self-heat.
That is, when the battery pack self-heating device is in the working process, the second heat exchange loop and the third heat exchange loop will work simultaneously, and when the temperature of the battery pack (the highest temperature in a plurality of detection point temperatures of the battery pack) is smaller than the seventh preset temperature and the temperature of the motor electric control assembly is greater than or equal to the third preset temperature, the motor electric control assembly temperature can meet the heating requirement in the vehicle at the moment, so that the battery pack is not required to be continuously heated, and the battery pack self-heating device is controlled to stop working.
As an example, if the temperature of the battery pack is greater than or equal to the seventh preset temperature during the simultaneous operation of the second heat exchange circuit and the third heat exchange circuit, the battery pack self-heating device, the second heat exchange circuit and the third heat exchange circuit are controlled to stop working, and the step of determining the first target heat exchange circuit according to the temperature of the motor electric control assembly and the temperature of the battery pack is returned.
As yet another example, if during the simultaneous operation of the second heat exchange circuit and the third heat exchange circuit, the highest temperature of the battery is always less than the seventh preset temperature, and the electric control temperature of the motor is always less than the third preset temperature, it is determined that the electric control temperature of the motor is low, the heat pump system still needs to absorb heat from the battery pack, the current solenoid valve (i.e., the first solenoid valve 31, the second solenoid valve 33, the third solenoid valve 36, the fifth solenoid valve 35) is kept open until receiving the heating closing command, the self-heating of the battery is stopped, the first solenoid valve 31, the second solenoid valve 33, the third solenoid valve 36, the fifth solenoid valve 35 is closed, the other solenoid valves are kept closed, and if the battery heat exchanger is a battery liquid cooling system, the water pump is stopped, the compressor is controlled to be turned off, and the passenger cabin is closed for heating.
Therefore, after the heating instruction in the vehicle is received, under the condition that the temperature of the heat exchanger outside the vehicle, the temperature of the motor electric control assembly and the temperature of the battery pack heat exchanger can not meet the heat exchange requirement, the battery pack self-heating device is controlled to work, and the heating in the vehicle is realized.
And S1503, if the thermal management instruction is a battery pack heating instruction, determining a second target heat exchange loop according to the outside environment temperature of the vehicle, and controlling the second target heat exchange loop to work so as to heat the battery pack.
In some embodiments, determining the second target heat exchange circuit from the vehicle exterior environment temperature may include: if the temperature of the outside environment of the vehicle is greater than or equal to the eighth preset temperature, determining that the second target heat exchange loop is a fourth heat exchange loop, wherein the fourth heat exchange loop is a heat exchange loop in which the battery pack heat exchanger and the outside heat exchanger are located.
That is, when the temperature of the outside environment of the vehicle is greater than or equal to the eighth preset temperature, it is indicated that the condition of the outside environment of the vehicle can meet the heating requirement of the battery pack at the current moment, and the fourth heat exchange loop (i.e. the heat exchange loop where the battery pack heat exchanger and the outside heat exchanger are located) is turned on and the other heat exchange loops are turned off by controlling the thermal management system according to the above embodiment of the present invention. Referring to fig. 9, the sixth solenoid valve 32, the fourth solenoid valve 34 are controlled to be opened, and the other solenoid valves are controlled to be closed.
In an exemplary manner, in a low-temperature environment, when the thermal management command is a battery pack heating command, it is indicated that the battery pack has a heating requirement at this time, and when it is detected that the temperature outside the vehicle is greater than or equal to the eighth preset temperature and the heating condition is satisfied, the thermal management system of the above embodiment can absorb the heat in the heat exchanger outside the vehicle and provide the heat to the battery Bao Huanre device, thereby realizing the battery pack heating.
If the temperature of the outside environment of the vehicle is smaller than the eighth preset temperature or the temperature of the outside environment of the vehicle is smaller than the ninth preset temperature in the working process of the fourth heat exchange loop, determining that the second target heat exchange loop is a fifth heat exchange loop, wherein the ninth preset temperature is smaller than the eighth preset temperature, and the fifth heat exchange loop is a heat exchange loop where the battery pack heat exchanger and the motor electric control assembly heat exchanger are located.
That is, when the external environment temperature of the vehicle cannot meet or no longer meet the heating requirement of the battery pack, the battery pack can be heated by using the waste heat generated by the motor electric control assembly in the operation process, and the fifth heat exchange loop (i.e. the heat exchange loop where the battery pack heat exchanger and the motor electric control assembly heat exchanger are located) is conducted and other heat exchange loops are disconnected by controlling the thermal management system according to the embodiment of the invention. Referring to fig. 9, the fifth solenoid valve 35 and the sixth solenoid valve 32 are controlled to be opened, and the other solenoid valves are controlled to be closed.
Optionally, the eighth preset temperature and the ninth preset temperature are determined according to the heat exchanging capability of the thermal management system and the heating requirement of the battery pack.
For example, in a low temperature environment, when the thermal management command is a battery pack heating command and the external environment temperature does not meet the heating condition, the thermal management system of the embodiment of the invention can be controlled to absorb the heat of the electric motor control assembly and provide the heat to the battery Bao Huanre device, so as to realize the heating of the battery pack.
As an example, if the temperature of the outside environment of the vehicle is greater than or equal to the ninth preset temperature during operation of the fourth heat exchange circuit, it is determined that the thermal management system can still absorb enough heat from the environment, the current solenoid valve is kept open until a battery pack heating closing command is received, the compressor is controlled to be closed, the sixth solenoid valve 32 and the fourth solenoid valve 34 are restored to the closed state, and the battery pack heating is closed.
Therefore, after a battery pack heating instruction is received, a corresponding heat exchange loop is selected as a second target heat exchange loop according to the difference between the temperature of the outside environment of the vehicle and the temperature of the motor electric control assembly at the current moment, and the work of the heat exchange loop can be controlled after the determination, so that the battery pack is heated.
It should be noted that in some embodiments, the thermal management system may further include a self-heating device of the battery pack, and if the temperature of the electric motor control assembly is less than or equal to a tenth preset temperature, or in the working process of the fifth heat exchange circuit, the temperature of the electric motor control assembly is less than an eleventh preset temperature, the self-heating device of the battery pack is controlled to work.
Wherein the eleventh preset temperature is less than the tenth preset temperature.
Optionally, the tenth preset temperature and the eleventh preset temperature are determined according to the heat exchange capability actually available to the motor electric control assembly and the heating requirement of the battery pack.
That is, when the temperature outside the vehicle cannot meet or no longer meet the heating requirement of the battery pack, and the temperature of the motor electric control assembly is smaller than or equal to the tenth preset temperature, or the temperature of the motor electric control assembly is smaller than the eleventh preset temperature in the working process of the fifth heat exchange loop, it is indicated that the waste heat generated in the operation of the motor electric control assembly cannot meet the heating requirement of the battery pack at this time, so as to improve the charging and discharging performance of the battery pack in a low-temperature environment and the driving range of the vehicle, and at this time, the self-heating device of the battery pack can be controlled to start working.
As an example, if the temperature of the electric motor control assembly is greater than or equal to the eleventh preset temperature during the operation of the fifth heat exchange circuit, it is determined that the thermal management system can still absorb enough heat from the electric motor control assembly, and the current solenoid valve is kept in an open state until a battery pack heating closing command is received, the compressor is controlled to be closed, the fifth solenoid valve 35 and the sixth solenoid valve 32 are restored to a closed state, and the battery pack heating is closed.
Therefore, after a battery pack heating instruction is received, under the condition that the external environment temperature of the vehicle and the temperature of the motor electric control assembly can not meet the heat exchange requirement, the battery pack self-heating device is controlled to work, and the battery pack is heated.
Further, an embodiment of the invention provides a vehicle.
Fig. 16 is a schematic structural view of a vehicle according to an embodiment of the present invention.
As shown in fig. 16, the vehicle 5 includes the thermal management system 1 as set forth in the above-described embodiment of the invention.
In addition, other structures and functions of the vehicle 5 according to the embodiment of the present invention are known to those skilled in the art, and are not described herein for redundancy reduction.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered as a ordered listing of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (21)

1. A thermal management system, the system comprising:
the heat exchange device comprises one or more heat exchange loops, wherein each heat exchange loop comprises a heat pump device, a heat absorption heat exchanger and a heat supply heat exchanger which are sequentially connected in series, when the number of the heat exchange loops is multiple, the heat pump device is shared by the heat exchange loops, the heat absorption heat exchanger comprises at least one of an in-vehicle heat exchanger and a battery pack heat exchanger, and the heat exchange loops are used for realizing in-vehicle heating or battery pack heating;
the valve assembly is used for realizing the on-off of each heat exchange loop;
when the heat absorption heat exchanger is the in-vehicle heat exchanger, the heat supply heat exchanger comprises at least one of the battery pack heat exchanger, an out-vehicle heat exchanger and a motor electric control assembly heat exchanger; when the heat absorption heat exchanger is the battery pack heat exchanger, the heat supply heat exchanger comprises at least one of the off-vehicle heat exchanger and the motor electric control assembly heat exchanger.
2. The thermal management system of claim 1, wherein the heat pump apparatus comprises a gas-liquid separator and a compressor connected in series, the compressor being connected proximate an input of the heat absorption heat exchanger, the gas-liquid separator being connected proximate an output of the heat supply heat exchanger.
3. The thermal management system of claim 1, wherein the heat absorption heat exchanger comprises an in-vehicle heat exchanger, the heat supply heat exchanger comprises a battery pack heat exchanger, the valve assembly comprises a first solenoid valve, a second solenoid valve, and a third solenoid valve, wherein,
the output end of the heat pump device is connected to the input end of the heat exchanger in the vehicle through the first electromagnetic valve, the output end of the heat exchanger in the vehicle is connected to the first end of the battery pack heat exchanger through the second electromagnetic valve, and the second end of the battery pack heat exchanger is connected to the input end of the heat pump device through the third electromagnetic valve, wherein the first end of the battery pack heat exchanger is the input end, and the second end of the battery pack heat exchanger is the output end.
4. The thermal management system of claim 1, wherein the heat absorption heat exchanger comprises an in-vehicle heat exchanger, the heat supply heat exchanger comprises an off-vehicle heat exchanger, the valve assembly comprises a first solenoid valve, a fourth solenoid valve, wherein,
The output end of the heat pump device is connected to the input end of the heat exchanger in the vehicle through the first electromagnetic valve, the output end of the heat exchanger in the vehicle is connected to the input end of the heat exchanger outside the vehicle through the fourth electromagnetic valve, and the output end of the heat exchanger outside the vehicle is connected to the input end of the heat pump device.
5. The thermal management system of claim 1, wherein the heat absorption heat exchanger comprises an in-vehicle heat exchanger, the heat supply heat exchanger comprises a motor electric control assembly heat exchanger, the valve assembly comprises a first solenoid valve, a fifth solenoid valve, wherein,
the output end of the heat pump device is connected to the input end of the heat exchanger in the vehicle through the first electromagnetic valve, the output end of the heat exchanger in the vehicle is connected to the input end of the motor electric control assembly heat exchanger through the fifth electromagnetic valve, and the output end of the motor electric control assembly heat exchanger is connected to the input end of the heat pump device.
6. The thermal management system of claim 1, wherein the heat absorption heat exchanger comprises a battery pack heat exchanger, the heat supply heat exchanger comprises an off-board heat exchanger, the valve assembly comprises a sixth solenoid valve, a fourth solenoid valve, wherein,
The output end of the heat pump device is connected to the second end of the battery pack heat exchanger through the sixth electromagnetic valve, the first end of the battery pack heat exchanger is connected to the input end of the external heat exchanger through the fourth electromagnetic valve, and the output end of the external heat exchanger is connected to the input end of the heat pump device, wherein the first end of the battery pack heat exchanger is the output end, and the second end is the input end.
7. The thermal management system of claim 1, wherein the heat absorption heat exchanger comprises a battery pack heat exchanger, the heat supply heat exchanger comprises a motor electric control assembly heat exchanger, the valve assembly comprises a sixth solenoid valve, a fifth solenoid valve, wherein,
the output end of the heat pump device is connected to the second end of the battery pack heat exchanger through the sixth electromagnetic valve, the first end of the battery pack heat exchanger is connected to the input end of the motor electric control assembly heat exchanger through the fifth electromagnetic valve, and the output end of the motor electric control assembly heat exchanger is connected to the input end of the heat pump device, wherein the first end of the battery pack heat exchanger is the output end, and the second end is the input end.
8. The thermal management system of any one of claims 3-7, wherein the valve assembly comprises a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, a sixth solenoid valve, wherein,
The output end of the heat pump device is connected with one end of the first electromagnetic valve to form a first node, the other end of the first electromagnetic valve is connected to the input end of the in-vehicle heat exchanger, the output end of the in-vehicle heat exchanger is connected with one end of the second electromagnetic valve to form a second node, the other end of the second electromagnetic valve is connected to the first end of the battery pack heat exchanger, the second end of the battery pack heat exchanger is connected with one end of the third electromagnetic valve to form a third node, and the other end of the third electromagnetic valve is connected to the input end of the heat pump device;
the second node is further connected with one end of the fourth electromagnetic valve and one end of the fifth electromagnetic valve respectively, the other end of the fourth electromagnetic valve is connected to the input end of the heat exchanger outside the vehicle, the output end of the heat exchanger outside the vehicle is connected to the input end of the heat pump device, the other end of the fifth electromagnetic valve is connected to the input end of the motor electric control assembly heat exchanger, the output end of the motor electric control assembly heat exchanger is connected to the input end of the heat pump device, the first node is further connected with one end of the sixth electromagnetic valve, the other end of the sixth electromagnetic valve is connected with the third node, and the first end of the battery pack heat exchanger is further connected with the second node.
9. The thermal management system of claim 8, wherein said valve assembly further comprises a first check valve, a second check valve, a third check valve, a fourth check valve, a fifth check valve, and a throttle valve,
the first one-way valve is connected between the first end of the battery pack heat exchanger and the second node, and the direction of the first one-way valve is away from the battery Bao Huanre device;
the second one-way valve is connected between the battery Bao Huanre device and the second electromagnetic valve, and the direction of the second one-way valve points to the battery Bao Huanre device;
the third one-way valve is connected between the third electromagnetic valve and the input end of the heat pump device, and the direction of the third one-way valve points to the heat pump device;
the fourth one-way valve is connected between the output end of the heat exchanger outside the vehicle and the input end of the heat pump device, and the direction of the fourth one-way valve points to the heat pump device;
the fifth one-way valve is connected between the output end of the motor electric control assembly heat exchanger and the input end of the heat pump device, and the direction of the fifth one-way valve points to the heat pump device.
10. The thermal management system of claim 9, wherein the valve assembly further comprises a throttle valve having one end connected to the output of the first check valve and the in-vehicle heat exchanger, respectively, and the other end connected to the second node.
11. The thermal management system of any of claims 1-7, wherein the battery pack heat exchanger comprises:
the heat exchange device comprises a plate heat exchanger, a battery pack liquid cooling heat exchange plate and a water pump, wherein the plate heat exchanger is provided with a first flow path and a second flow path, the first flow path is connected to a corresponding heat exchange loop, and the second flow path is connected with the battery pack liquid cooling heat exchange plate and the water pump in series; or alternatively
The direct cooling and direct heating heat exchange plate of the battery pack is connected to the corresponding heat exchange loop.
12. The thermal management system of claim 6 or 7, further comprising a battery pack self-heating device comprising:
the battery pack comprises a first battery cell group and a second battery cell group which are connected in series;
the motor electric control assembly comprises a motor and a motor controller, positive and negative buses of the motor controller are respectively and correspondingly connected with the positive and negative poles of the battery pack, one ends of three-phase coils of the motor are respectively and correspondingly connected to midpoints of three-phase bridge arms of the motor controller, and the other ends of the three-phase coils are respectively and correspondingly connected to serial connection points of the first battery cell group and the second battery cell group.
13. A control method for a thermal management system according to any one of claims 1 to 12, the method comprising:
receiving a thermal management instruction;
and controlling the thermal management system according to the thermal management instruction to realize heating in the vehicle and/or heating of the battery pack.
14. The method of claim 13, wherein controlling the thermal management system according to the thermal management command to achieve in-vehicle heating and/or battery pack heating comprises:
controlling a compressor in the heat pump device to be started;
if the thermal management instruction is an in-vehicle heating instruction, determining a first target heat exchange loop according to the temperature of the outside of the vehicle, the temperature of an electric control assembly of the motor and the temperature of a battery pack, and controlling the target heat exchange loop to work so as to realize in-vehicle heating;
and if the thermal management instruction is a battery pack heating instruction, determining a second target heat exchange loop according to the outside environment temperature of the vehicle, and controlling the second target heat exchange loop to work so as to realize battery pack heating.
15. The method of claim 14, wherein determining the first target heat exchange circuit based on the vehicle exterior environment temperature, the motor electric control assembly temperature, and the battery pack temperature comprises:
If the temperature of the outside environment of the vehicle is greater than or equal to a first preset temperature, determining that the first target heat exchange loop is a first heat exchange loop, wherein the first heat exchange loop is a heat exchange loop in which the heat exchanger in the vehicle and the heat exchanger outside the vehicle are located;
and if the temperature of the outside environment of the vehicle is smaller than the first preset temperature or the temperature of the outside environment of the vehicle is smaller than a second preset temperature in the working process of the first heat exchange loop, determining the first target heat exchange loop according to the temperature of the electric control assembly of the motor and the temperature of the battery pack, wherein the second preset temperature is smaller than the first preset temperature.
16. The method of claim 15, wherein determining the first target heat exchange circuit based on the motor control assembly temperature and the battery pack temperature comprises:
if the temperature of the motor electric control assembly is higher than a third preset temperature, determining that the first target heat exchange loop is a second heat exchange loop, wherein the second heat exchange loop is a heat exchange loop where the in-vehicle heat exchanger and the motor electric control assembly heat exchanger are located;
if the temperature of the motor electric control assembly is smaller than the third preset temperature or in the working process of the second heat exchange loop, the temperature of the motor electric control assembly is smaller than a fourth preset temperature, and the first target heat exchange loop is determined according to the temperature of the battery pack, wherein the fourth preset temperature is smaller than the third preset temperature.
17. The method of claim 16, wherein determining a first target heat exchange circuit based on the battery pack temperature comprises:
if the temperature of the battery pack is greater than or equal to a fifth preset temperature, determining that the target heat exchange loop is a third heat exchange loop, wherein the third heat exchange loop is a heat exchange loop where the in-vehicle heat exchanger and the battery pack heat exchanger are located;
if the temperature of the battery pack is smaller than the fifth preset temperature or the temperature of the battery pack is smaller than a sixth preset temperature in the working process of the third heat exchange loop, the first target heat exchange loop is determined to comprise the second heat exchange loop and the third heat exchange loop, wherein the sixth preset temperature is smaller than the fifth preset temperature.
18. The method of controlling a thermal management system of claim 17, wherein the thermal management system further comprises a battery pack self-heating device, the method further comprising:
if the low temperature of the battery pack is smaller than the fifth preset temperature or the temperature of the battery pack is smaller than the sixth preset temperature in the working process of the third heat exchange loop, controlling the battery self-heating device to work;
If the temperature of the battery pack is smaller than a seventh preset temperature and the temperature of the motor electric control assembly is greater than or equal to the third preset temperature in the process of simultaneously working the second heat exchange loop and the third heat exchange loop, the battery pack self-heating device, the second heat exchange loop and the third heat exchange loop are controlled to stop working, and the step of determining the first target heat exchange loop according to the temperature of the motor electric control assembly and the temperature of the battery pack is returned.
19. The method of claim 14, wherein determining a second target heat exchange circuit based on the outside environment temperature comprises:
if the temperature of the outside environment of the vehicle is greater than or equal to an eighth preset temperature, determining that the second target heat exchange loop is a fourth heat exchange loop, wherein the fourth heat exchange loop is a heat exchange loop in which the battery pack heat exchanger and the outside heat exchanger are located;
and if the temperature of the outside environment of the vehicle is smaller than the eighth preset temperature, or in the working process of the fourth heat exchange loop, the temperature of the outside environment of the vehicle is smaller than the ninth preset temperature, and the second target heat exchange loop is determined to be a fifth heat exchange loop, wherein the ninth preset temperature is smaller than the eighth preset temperature, and the fifth heat exchange loop is a heat exchange loop where the battery pack heat exchanger and the motor electric control assembly heat exchanger are located.
20. The method of claim 19, further comprising a battery pack self-heating device, the method further comprising:
and if the temperature of the motor electric control assembly is smaller than or equal to the tenth preset temperature, or in the working process of the fifth heat exchange loop, controlling the battery pack self-heating device to work.
21. A vehicle comprising a thermal management system according to any one of claims 1-12.
CN202210475920.3A 2022-04-29 2022-04-29 Thermal management system, control method thereof and vehicle Pending CN117002222A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202210475920.3A CN117002222A (en) 2022-04-29 2022-04-29 Thermal management system, control method thereof and vehicle
PCT/CN2023/091486 WO2023208175A1 (en) 2022-04-29 2023-04-28 Vehicle air conditioning system, heat management system and control method therefor, and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210475920.3A CN117002222A (en) 2022-04-29 2022-04-29 Thermal management system, control method thereof and vehicle

Publications (1)

Publication Number Publication Date
CN117002222A true CN117002222A (en) 2023-11-07

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Family Applications (1)

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CN202210475920.3A Pending CN117002222A (en) 2022-04-29 2022-04-29 Thermal management system, control method thereof and vehicle

Country Status (1)

Country Link
CN (1) CN117002222A (en)

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