Vehicle thermal management system

Abstract

The utility model provides a vehicle thermal management system, and relates to the technical field of automobiles. The vehicle heat management system comprises a battery heat exchange water loop, a heating loop and a cooling loop, a temperature sensor is arranged in the battery heat exchange water loop and used for detecting the temperature in the battery heat exchange water loop, the heating loop is used for heating the battery heat exchange water loop, and the cooling loop is used for cooling the battery heat exchange water loop. The cooling loop communicates with the heating loop, a first valve is arranged at the communication position of the cooling loop and the heating loop and used for adjusting the communication state of the cooling loop and the heating loop, and the control module is used for controlling the opening degree of the first valve according to the detection result of the temperature sensor. The vehicle heat management system meets the structure, heat generated by the battery can be recycled through the heating loop, and the heat utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a vehicle thermal management system. Background Art

[0002] In recent years, hybrid vehicles have developed rapidly. Hybrid vehicles generally include traditional power engines and power battery systems. In order to achieve comprehensive utilization of engine and motor electronic control heat and reasonable energy distribution under various working conditions, a vehicle thermal management method is needed to improve the energy utilization rate of the vehicle. The battery needs to be kept within a certain temperature range for use, so the battery heat exchange circuit needs to alternate between heating and cooling the battery. The current vehicle thermal management method usually uses a cooler to directly cool the heat exchange circuit, which makes the battery heat unable to be recycled, resulting in heat waste. Utility Model Content

[0003] The utility model aims to provide a vehicle thermal management system, which solves the problem that the heat of the battery cannot be recycled.

[0004] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0005] In a first aspect, the utility model provides a vehicle thermal management system, comprising: a battery hot water exchange circuit, in which a temperature sensor is provided, the temperature sensor is used to detect the temperature in the battery hot water exchange circuit, the battery hot water exchange circuit is at least partially in contact with the battery; a heating circuit, the heating circuit is used to heat the battery hot water exchange circuit; a cooling circuit, the cooling circuit is used to cool the battery hot water exchange circuit, the cooling circuit and the heating circuit are connected; a first valve, arranged at the connection point between the cooling circuit and the heating circuit; a control module, electrically connected to the temperature sensor and the first valve, the control module is used to control the switching of the first valve according to the detection result of the temperature sensor.

[0006] In one embodiment, the control module is used to determine that the temperature in the battery hot water exchange circuit is greater than a set temperature, and is also used to control the first valve to connect the cooling circuit and the heating circuit; and / or, the control module is used to determine that the temperature in the battery hot water exchange circuit is less than or equal to a set temperature, and is also used to control the first valve to isolate the cooling circuit and the heating circuit.

[0007] In one embodiment, the heating circuit includes a motor heating water circuit, the cooling circuit includes a motor cooling water circuit, the motor cooling water circuit is provided with a first cooling element, the motor heating water circuit and the motor cooling water circuit are connected, and the first valve is arranged at the connection point between the motor heating water circuit and the motor cooling water circuit.

[0008] In one embodiment, the motor cooling water circuit and the motor heating water circuit form a motor circuit, the motor circuit is connected to the battery hot water exchange circuit, a fourth valve is provided at the connection between the motor circuit and the battery hot water exchange circuit, and the fourth valve is spaced apart from the first valve.

[0009] In one embodiment, the cooling circuit also includes an intercooler cooling water circuit, the intercooler cooling water circuit is provided with a third cooling element, the intercooler cooling water circuit is connected to the motor circuit, a fifth valve is provided at the connection between the intercooler cooling water circuit and the motor circuit, the fifth valve is electrically connected to the control module, the control module is used to determine that the intake circuit is connected, the control module is used to control the fifth valve to connect the intercooler cooling water circuit and the motor circuit; and / or, the control module is used to determine that the intake circuit is isolated, the control module is used to control the fifth valve to isolate the intercooler cooling water circuit and the motor circuit.

[0010] In one embodiment, a branch of the motor heating water circuit is connected to the battery hot water exchange circuit, and the connection between the motor heating water circuit and the battery hot water exchange circuit is connected to the connection between the battery hot water exchange circuit and the motor circuit. A second valve is provided at the connection between the motor heating water circuit and the battery hot water exchange circuit, and the second valve is electrically connected to the control module. The control module is used to determine whether the temperature in the battery hot water exchange circuit is greater than or equal to a set temperature, and the control module is used to control the opening of the second valve to bypass the branch of the motor heating water circuit and the battery hot water exchange circuit; and / or, the control module is used to determine whether the temperature in the battery hot water exchange circuit is less than a set temperature, and the control module is used to control the second valve to isolate the branch of the motor heating water circuit from the battery hot water exchange circuit.

[0011] In one embodiment, the heating circuit also includes a warm air water circuit, the warm air water circuit is provided with a first heating element, the warm air water circuit is partially in contact with the motor heating water circuit, and the warm air water circuit is used to exchange heat with the battery water exchange circuit through the motor heating water circuit.

[0012] In one embodiment, the first valve is disposed at the joint between the motor heating water circuit and the warm air water circuit.

[0013] In one embodiment, the heating circuit also includes an engine heating water circuit, and the cooling circuit also includes an engine cooling water circuit, the engine cooling water circuit is provided with a second cooling element, the engine cooling water circuit is connected to the engine heating water circuit, and a partition is provided at the connection point between the engine cooling water circuit and the engine heating water circuit, and the partition is used to connect or isolate the engine cooling water circuit and the engine heating water circuit.

[0014] In one embodiment, the engine heating water circuit and the warm air water circuit are connected, and a third valve is provided at the connection point between the engine heating water circuit and the warm air water circuit, and the third valve is electrically connected to the control module, and the control module is used to determine that the temperature in the battery hot water exchange circuit is greater than a set temperature, and the control module is used to control the third valve to isolate the engine heating water circuit and the warm air water circuit; and / or, the control module is used to determine that the temperature in the battery hot water exchange circuit is less than or equal to a set temperature, and the control module is used to control the connection between the engine heating water circuit and the warm air water circuit.

[0015] In one embodiment, the vehicle thermal management system also includes an air-conditioning refrigerant circuit, which is used to exchange heat with an air-conditioning compressor. The air-conditioning refrigerant circuit is partially attached to the motor circuit and the battery water exchange circuit respectively. A reversing valve is provided on the air-conditioning refrigerant circuit, and the reversing valve is electrically connected to the control module. The reversing valve is used to change the flow direction of the refrigerant so that the air-conditioning compressor can switch between heating and cooling.

[0016] The vehicle thermal management system provided by the utility model includes a battery hot water exchange circuit, a heating circuit and a cooling circuit. A temperature sensor is provided inside the battery hot water exchange circuit, and the temperature sensor is used to detect the temperature in the battery hot water exchange circuit. The heating circuit is used to heat the battery hot water exchange circuit, and the cooling circuit is used to cool the battery hot water exchange circuit. The cooling circuit and the heating circuit are connected, and a first valve is provided at the connection point between the cooling circuit and the heating circuit. The first valve is used to adjust the connection state of the cooling circuit and the heating circuit. The control module is used to control the opening of the first valve according to the detection result of the temperature sensor, so that when the temperature in the battery hot water exchange circuit is greater than the set temperature, the cooling circuit and the battery hot water exchange circuit are in close contact with each other for heat exchange. The control module controls the first valve to connect the cooling circuit and the heating circuit, and the heat can be transferred from the battery hot water exchange circuit to the cooling circuit, and then from the cooling circuit to the heating circuit, so that the heating circuit absorbs heat from the battery, that is, the heat of the battery becomes the heat source of the heating circuit, which is conducive to improving the recovery rate of heat energy, thereby improving the economy of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The present invention is a schematic diagram of the structure of a vehicle thermal management system according to an embodiment.

[0019] Description of reference numerals:

[0020] 10-battery hot water circuit, 11-temperature sensor, 12-battery, 13-control module, 14-fourth valve, 15-battery water pump, 16-battery cooler;

[0021] 20-motor circuit, 21-motor heating water circuit, 22-motor cooling water circuit, 23-first valve, 24-first cooling element, 25-second valve, 26-sixth valve, 27-motor, 28-all-in-one controller, 29-motor water pump, 201-thermometer;

[0022] 31-heating water circuit, 32-first heating element, 33-third valve, 34-heat exchanger, 35-heating water pump;

[0023] 41-engine heating water circuit, 42-engine cooling water circuit, 43-intercooling cooling water circuit, 44-second cooling element, 45-partition element, 46-third cooling element, 47-fifth valve, 48-engine, 49-engine water pump;

[0024] 51 - air conditioning refrigerant circuit, 52 - air conditioning compressor, 53 - reversing valve, 54 - in-vehicle heat exchanger, 55 - first electronic valve, 56 - second electronic valve, 57 - water-cooled condenser. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0031] The present invention provides a vehicle thermal management system. Figure 1The vehicle thermal management system includes a battery hot water exchange circuit 10, a heating circuit and a cooling circuit. A temperature sensor 11 is provided inside the battery hot water exchange circuit 10. The temperature sensor 11 is used to detect the temperature inside the battery hot water exchange circuit 10. The battery hot water exchange circuit 10 is at least partially attached to the battery 12. The battery hot water exchange circuit 10 is used to exchange heat with the battery. The heating circuit and the cooling circuit, the heating circuit is used to heat the battery hot water exchange circuit 10, and the cooling circuit is used to cool the battery hot water exchange circuit 10. When the temperature of the battery 12 is high, the heat is transferred from the battery hot water exchange circuit 10 to the cooling circuit, and when the temperature of the battery 12 is low, the heat is transferred from the heating circuit to the battery hot water exchange circuit 10. Optionally, a battery water pump 15 is provided on the battery hot water exchange circuit 10.

[0032] The vehicle thermal management system further includes a first valve 23 and a control module 13. The cooling circuit and the heating circuit are connected. The first valve 23 is provided at the connection point between the cooling circuit and the heating circuit. The first valve 23 is used to adjust the connection state between the cooling circuit and the heating circuit. The control module 13 is electrically connected to the temperature sensor 11 and the first valve 23.

[0033] The flow direction of the fluid at the connection point of the cooling circuit and the heating circuit can be the same or different. Optionally, the flow direction of the fluid at the connection point of the cooling circuit and the heating circuit is the same, which helps to avoid the fluid in the cooling circuit and the heating circuit from colliding at the connection point, thereby helping to increase the service life of the cooling circuit and the heating circuit.

[0034] The battery 12 needs to work at a set temperature, which can be a numerical value or a numerical range. In the present application, the set temperature of the battery 12 is a numerical range. The battery 12 is attached to at least part of the battery hot water exchange circuit 10, so that the battery 12 and the battery hot water exchange circuit 10 can transfer heat to each other, so that the temperature in the battery hot water exchange circuit 10 is controlled within the set temperature, that is, the battery 12 can be controlled within the set temperature.

[0035] Specifically, when the temperature in the battery hot water exchange circuit 10 is greater than the set temperature, the cooling circuit and the battery hot water exchange circuit 10 are in contact with each other for heat exchange, and the control module 13 controls the first valve 23 to connect the cooling circuit and the heating circuit. Heat can be transferred from the battery hot water exchange circuit 10 to the cooling circuit, and then from the cooling circuit to the heating circuit, so that the heating circuit absorbs heat from the battery 12, that is, the heat of the battery 12 becomes the heat source of the heating circuit, which is beneficial to improve the recovery rate of heat energy, thereby improving the economy of the vehicle.

[0036] Optionally, the control module 13 is used to determine that the temperature in the battery hot water exchange circuit 10 is greater than the set temperature based on the detection result of the temperature sensor 11, and is also used to control the first valve 23 to connect the cooling circuit and the heating circuit; and / or, the control module 13 is used to determine that the temperature in the battery hot water exchange circuit 10 is less than or equal to the set temperature based on the detection result of the temperature sensor 11, and is also used to control the first valve 23 to isolate the cooling circuit and the heating circuit.

[0037] Optionally, when the temperature in the battery hot water exchange circuit 10 is greater than the set temperature, the cooling circuit and the battery hot water exchange circuit 10 are in contact with each other for heat exchange, and the control module 13 controls the first valve 23 to connect the cooling circuit and the heating circuit, so that the heat absorbed by the cooling circuit from the battery hot water exchange circuit 10 is transferred to the heating circuit, thereby realizing that the heating circuit absorbs heat from the battery 12, that is, the heat of the battery 12 becomes the heat source of the heating circuit, which is beneficial to improving the recovery rate of heat energy and thus improving the economy of the vehicle; when the temperature in the battery hot water exchange circuit 10 is less than or equal to the set temperature, the control module 13 controls the first valve 23 to isolate the cooling circuit and the heating circuit, and the heating circuit and the battery hot water exchange circuit 10 are in contact with each other, and the heating circuit transfers heat to the battery hot water exchange circuit 10, thereby realizing the circulation of heat in the vehicle thermal management system, which is beneficial to improving the economy of the vehicle.

[0038] The vehicle thermal management system provided by the utility model includes a battery hot water exchange circuit 10, a heating circuit and a cooling circuit. A temperature sensor 11 is provided inside the battery hot water exchange circuit 10. The temperature sensor 11 is used to detect the temperature inside the battery hot water exchange circuit 10. The heating circuit is used to heat the battery hot water exchange circuit 10, and the cooling circuit is used to cool the battery hot water exchange circuit 10. By connecting the cooling circuit and the heating circuit, a first valve 23 is provided at the connection point between the cooling circuit and the heating circuit. The first valve 23 is used to adjust the connection state of the cooling circuit and the heating circuit. The control module 13 is used to control the switching of the first valve 23 according to the detection result of the temperature sensor 11, so that when the temperature inside the battery hot water exchange circuit 10 is greater than the set temperature, the cooling circuit and the battery hot water exchange circuit 10 are in contact with each other for heat exchange. The control module 13 controls the first valve 23 to connect the cooling circuit and the heating circuit. The heat can be transferred from the battery hot water exchange circuit 10 to the cooling circuit, and then transferred from the cooling circuit to the heating circuit, so that the heating circuit absorbs heat from the battery 12, that is, the heat of the battery 12 becomes the heat source of the heating circuit, which is conducive to improving the recovery rate of heat energy, thereby improving the economy of the vehicle.

[0039] In one implementation, see Figure 1The heating circuit includes a motor heating water circuit 21, and the cooling circuit includes a motor cooling water circuit 22. The motor cooling water circuit 22 is provided with a first cooling member 24. The motor heating water circuit 21 and the motor cooling water circuit 22 are connected. The first valve 23 is arranged at the connection point between the motor heating water circuit 21 and the motor cooling water circuit 22.

[0040] The motor circuit 20 is provided with a thermometer 201, which is electrically connected to the control module 13. The thermometer 201 is used to detect the temperature in the motor circuit 20. The control module 13 determines whether the temperature in the motor circuit 20 is less than, equal to, or greater than the operating temperature of the motor 27 based on the measurement result of the thermometer 201. The motor 27 needs to work at the operating temperature of the motor 27. The operating temperature of the motor 27 can be set to a value or a range of values. In the present application, the operating temperature of the motor 27 is a range of values.

[0041] Optionally, the motor cooling water circuit 22 and the motor heating water circuit 21 form a motor circuit 20, and the motor circuit 20 is provided with a motor 27 and an all-in-one controller 28, and the all-in-one controller 28 is used to integrate power devices such as the motor 27 controller, the vehicle charger, and the DC power supply. The first valve 23 is a three-way valve, the first cooling element 24 is a low-temperature radiator, the inlet of the first valve 23 is connected to the motor 27, and the outlet of the first valve 23 is respectively connected to the first cooling element 24 and the motor heating water circuit 21. Optionally, when the temperature in the motor circuit 20 is greater than the working temperature of the motor 27, the control module 13 controls the first valve 23 to switch, the first valve 23 is connected to the first cooling element 24, and the first valve 23 is isolated from the motor heating water circuit 21, so that the motor circuit 20 is the motor cooling water circuit 22, thereby cooling the motor 27 and ensuring that the motor 27 can work within the working temperature of the motor 27. When the temperature in the motor circuit 20 is less than or equal to the operating temperature of the motor 27, the control module 13 controls the first valve 23 to switch. The control module 13 controls the first valve 23 to be connected to the first cooling component 24 and the motor heating water circuit 21 respectively, so that the motor circuit 20 is the motor heating water circuit 21, thereby heating the motor 27 and ensuring that the motor 27 can operate within the operating temperature of the motor 27.

[0042] Optionally, the operating temperature of the motor 27 is greater than the set temperature of the battery 12. When the temperature in the battery hot water exchange circuit 10 is greater than the set temperature, the first valve 23 is connected to the first cooling member 24, so that the first cooling member 24 cools the battery 12, and the control module 13 controls the first valve 23 to be connected to the motor heating water circuit 21, that is, the motor heating water circuit 21 and the motor cooling water circuit 22 are connected, so that the heat in the motor circuit 20 is transferred to the motor heating water circuit 21, and can be used as a heat source for the motor heating water circuit 21, which is conducive to improving the recovery rate of heat energy, thereby improving the economy of the vehicle. When the temperature in the battery hot water exchange circuit 10 is less than or equal to the set temperature, the first valve 23 is connected to the motor heating water circuit 21, so that the heat in the motor circuit 20 is transferred to the motor heating water circuit 21, and the motor heating water circuit 21 is used to heat the battery hot water exchange circuit 10, thereby heating the battery 12 and ensuring that the battery 12 can work within the set temperature.

[0043] In one implementation, see Figure 1 The motor cooling water circuit 22 and the motor heating water circuit 21 form a motor circuit 20, and the motor circuit 20 is connected to the battery hot water circuit 10, so that the coolant in the motor circuit 20 is connected to the coolant in the battery hot water circuit 10, which is beneficial to increase the heat exchange efficiency between the motor circuit 20 and the battery hot water circuit 10. A fourth valve 14 is provided at the connection point between the motor circuit 20 and the battery hot water circuit 10, and the fourth valve 14 is electrically connected to the control module 13. Optionally, a motor water pump 29 is provided on the motor circuit 20.

[0044] Optionally, when the temperature in the battery hot water exchange circuit 10 is continuously greater than the set temperature, the control module 13 controls the fourth valve 14 to isolate the motor circuit 20 and the battery hot water exchange circuit 10, so as to prevent the motor circuit from heating the battery hot water exchange circuit 10, thereby ensuring that the battery 12 can operate within the set temperature. When the temperature in the battery hot water exchange circuit 10 is less than or equal to the set temperature, the control module 13 controls the fourth valve 14 to connect the motor circuit 20 and the battery hot water exchange circuit 10, so that the motor circuit 20 can exchange heat with the battery hot water exchange circuit 10.

[0045] The fourth valve 14 and the first valve 23 are arranged at intervals so that the first valve 23 and the fourth valve 14 work independently without affecting each other. The motor cooling water circuit 22 and the motor heating water circuit 21 can be connected to the battery hot water circuit 10 at the fourth valve 14 respectively.

[0046] In one implementation, see Figure 1The cooling circuit also includes an intercooler cooling water circuit 43, which is used for heat exchange with the intake circuit of the engine 48. A sensor is provided in the intake circuit, and the sensor is electrically connected to the control module 13. The intercooler cooling water circuit 43 is provided with a third cooling member 46, and the intercooler cooling water circuit 43 is connected to the motor circuit 20. A fifth valve 47 is provided at the connection between the intercooler cooling water circuit 43 and the motor circuit 20, and the fifth valve 47 is electrically connected to the control module 13. The control module 13 is used to determine that the intake circuit is connected according to the measurement result of the sensor, and the control module 13 is used to control the fifth valve 47 to connect the intercooler cooling water circuit 43 and the motor circuit 20; and / or, the control module 13 is used to determine that the intake circuit is disconnected according to the measurement result of the sensor, and the control module 13 is used to control the fifth valve 47 to disconnect the intercooler cooling water circuit 43 and the motor circuit 20.

[0047] The vehicle is a hybrid vehicle having a pure electric mode and a hybrid mode, and the engine 48 works only in the hybrid mode. In the hybrid mode, the intake circuit is connected; in the pure electric mode, the intake circuit is isolated. Optionally, the third cooling element 46 is a water-cooled intercooler. When the vehicle is in hybrid mode, the control module 13 controls the fifth valve 47 to connect the intercooler cooling water circuit 43 and the motor circuit 20, so that the intercooler cooling water circuit 43 can exchange heat with the battery hot water exchange circuit 10 through the motor circuit 20, and the third cooling element 46 can cool the battery 12, which is beneficial to ensure that the battery 12 can operate within a set temperature; and the third cooling element 46 can transfer the heat in the intake circuit to the motor circuit 20, and transfer it to the motor 27 through the motor circuit 20 to ensure that the motor 27 provides heat at the operating temperature of the motor 27, and then transfer it to the battery hot water exchange circuit 10 and the warm air water circuit 31 through the motor circuit 20, so that heat is transferred from the battery hot water exchange circuit 10 to the battery 12, and heat is transferred from the warm air water circuit 31 to the warm air core, which is beneficial to improve the recovery rate of thermal energy, thereby improving the economy of the vehicle.

[0048] In one implementation, see Figure 1, the branch of the motor heating water circuit 21 is connected to the battery hot water exchange circuit 10, and the connection point between the motor heating water circuit 21 and the battery hot water exchange circuit 10 is connected to the connection point between the battery hot water exchange circuit 10 and the motor circuit 20, so that the coolant in the motor heating water circuit 21 is connected to the coolant in the battery hot water exchange circuit 10, and the coolant in the motor heating water circuit 21 directly returns to the motor circuit 20 after entering the battery hot water exchange circuit 10, so that the coolant entering the battery hot water exchange circuit 10 through the fourth valve 14 is diverted, thereby controlling the flow of coolant from the motor circuit 20 entering the battery hot water exchange circuit 10 to exchange heat with the battery 12. A second valve 25 is provided at the connection point between the motor heating water circuit 21 and the battery hot water exchange circuit 10, and the second valve 25 can control the opening, so that the second valve 25 can control the flow of coolant between the motor heating water circuit 21 and the battery hot water exchange circuit 10, thereby facilitating the fine control of the heating of the battery 12. The control module 13 is used to control the opening of the second valve 25 according to the detection result of the temperature sensor 11, that is, the control module 13 can control the second valve 25 from being disconnected to being connected, and / or control the second valve 25 from being opened slightly to being fully opened.

[0049] The second valve 25 is electrically connected to the control module 13. The control module 13 is used to determine that the temperature in the battery hot water exchange circuit 10 is greater than or equal to the set temperature according to the detection result of the temperature sensor 11, and the control module 13 is used to control the second valve 25 to connect the branch of the motor heating water circuit 21 with the battery hot water exchange circuit 10; and / or, the control module 13 is used to determine that the temperature in the battery hot water exchange circuit 10 is less than the set temperature according to the detection result of the temperature sensor 11, and the control module 13 is used to control the second valve 25 to isolate the branch of the motor heating water circuit 21 from the battery hot water exchange circuit 10. The control module 13 can control the opening of the second valve 25 according to the amount by which the temperature in the battery hot water exchange circuit 10 is greater than the set temperature. The higher the temperature in the battery hot water exchange circuit 10, the greater the opening of the second valve 25. When the temperature in the battery hot water exchange circuit 10 is continuously greater than the set temperature, the control module 13 controls the second valve 25 to close and controls the fourth valve 14 to isolate the motor circuit 20 and the battery hot water exchange circuit 10.

[0050] Optionally, when the temperature in the battery hot water circuit 10 is greater than or equal to the set temperature, the control module 13 controls the opening of the second valve 25 to increase, thereby reducing the flow of the coolant for heat exchange between the motor heating water circuit 21 and the battery hot water circuit 10, and controlling the temperature increase of the motor circuit 20 on the battery hot water circuit 10 to ensure that the battery 12 can work within the set temperature. When the temperature in the battery hot water circuit 10 is continuously greater than the set temperature, the control module 13 controls the second valve 25 to close and controls the fourth valve 14 to cut off the motor circuit 20 and the battery hot water circuit 10, thereby preventing the motor circuit 20 from connecting and exchanging heat with the battery hot water circuit 10. When the temperature in the battery hot water circuit 10 is lower than the set temperature, the control module 13 controls the fourth valve 14 to connect the motor circuit 20 and the battery hot water circuit 10, and the second valve 25 cuts off the branch of the motor heating water circuit 21 and the battery hot water circuit 10, so that the motor heating water circuit 21 heats the battery hot water circuit 10.

[0051] In one implementation, see Figure 1 The heating circuit also includes a warm air water circuit 31, the warm air water circuit 31 is provided with a first heating element 32, the warm air water circuit 31 is partially attached to the motor heating water circuit 21, and the warm air water circuit 31 is used to exchange heat with the battery water exchange circuit 10 through the motor heating water circuit 21. The control module 13 is electrically connected to the first heating element 32. Optionally, a warm air water pump 35 is provided on the warm air water circuit 31.

[0052] Optionally, the first heat exchange element may be an electric heater, which may be a positive temperature coefficient (PTC) component. A heat exchanger 34 is provided at the joint of the warm air water circuit 31 and the motor heating water circuit 21, so that heat is transferred between the warm air water circuit 31 and the motor heating water circuit 21. The heat exchanger 34 may be a water-to-water plate heat exchanger. When the temperature in the battery water exchange water circuit 10 is less than or equal to the set temperature, the control module 13 controls the first heating element 32 to heat, and the heat is transferred from the warm air water circuit 31 to the motor heating water circuit 21, and then from the motor heating water circuit 21 to the battery water exchange water circuit 10, so that the warm air water circuit 31 heats the battery water exchange water circuit 10 through the heat exchanger 34.

[0053] Optionally, the first valve 23 is arranged at the joint of the motor heating water circuit 21 and the warm air water circuit 31. A heat exchanger 34 is arranged at the joint of the warm air water circuit 31 and the motor heating water circuit 21. A warm air core is arranged on the warm air water circuit 31. The warm air core is used to convert the heat of the warm air water circuit 31 into hot air so as to provide hot air for the cab. When the temperature in the battery hot water circuit 10 is greater than the set temperature, the motor cooling water circuit 22 is used to cool the battery hot water circuit 10. The control module 13 controls the first valve 23 to communicate with the motor heating water circuit 21 so that the heat is transferred to the motor heating water circuit 21. The motor heating water circuit 21 heats the warm air water circuit 31 through the heat exchanger 34, so that the heat of the battery 12 can be transferred to the warm air water circuit 31. The heat of the battery 12 and the heat of the first heating element 32 are used together to provide heat for the warm air core, which is conducive to improving the recovery rate of heat energy, thereby improving the economy of the vehicle.

[0054] In one implementation, see Figure 1 The heating circuit also includes an engine heating water circuit 41, and the cooling circuit also includes an engine cooling water circuit 42. The engine cooling water circuit 42 is provided with a second cooling member 44. The engine cooling water circuit 42 is connected to the engine heating water circuit 41. A partition 45 is provided at the connection point between the engine cooling water circuit 42 and the engine heating water circuit 41. The partition 45 is used to connect or isolate the engine cooling water circuit 42 and the engine heating water circuit 41. An engine 48 is provided on the engine heating water circuit 41. The vehicle is a hybrid vehicle with a pure electric mode and a hybrid mode. The engine 48 works only in the hybrid mode. The partition 45 can be a thermostat. The thermostat is an automatic temperature regulating device, which usually contains a temperature sensing component. The thermostat is used to automatically adjust the amount of water entering the radiator according to the temperature of the cooling water, change the circulation range of the water, and ensure that the engine 48 works within a suitable temperature range. Optionally, an engine water pump 49 is provided on the engine heating water circuit 41.

[0055] Optionally, the second cooling member 44 is a high-temperature radiator, and the partition member 45 is disposed between the engine 48 and the high-temperature radiator. In the hybrid mode, when the temperature in the battery hot water exchange circuit 10 is less than or equal to the set temperature, the engine heating water circuit 41 is used to heat the battery hot water exchange circuit 10, thereby heating the battery 12 to ensure that the battery 12 can operate within the set temperature; when the temperature in the battery hot water exchange circuit 10 is greater than the set temperature, the engine cooling water circuit 42 is used to cool the battery hot water exchange circuit 10.

[0056] In one implementation, see Figure 1The engine heating water circuit 41 is connected to the warm air water circuit 31, and a third valve 33 is provided at the connection point between the engine heating water circuit 41 and the warm air water circuit 31. The third valve 33 is electrically connected to the control module 13. The control module 13 is used to determine that the temperature in the battery hot water exchange circuit 10 is greater than the set temperature according to the detection result of the temperature sensor 11, and the control module 13 is used to control the third valve 33 to isolate the engine heating water circuit 41 and the warm air water circuit 31; and / or, the control module 13 is used to determine that the temperature in the battery hot water exchange circuit 10 is less than or equal to the set temperature according to the detection result of the temperature sensor 11, and the control module 13 is used to control the connection between the engine heating water circuit 41 and the warm air water circuit 31.

[0057] Optionally, in hybrid mode, when the temperature in the battery hot water exchange circuit 10 is less than or equal to the set temperature, the control module 13 controls the third valve 33 to connect the engine heating water circuit 41 and the warm air water circuit 31, so that the heat connected to the engine heating water circuit 41 is transferred to the warm air water circuit 31, and the heat is then transferred from the warm air water circuit 31 to the hot water circuit of the motor 27, and the heat is then transferred from the hot water circuit of the motor 27 to the battery hot water exchange circuit 10 to heat the battery 12. When the temperature in the battery hot water exchange circuit 10 is greater than the set temperature, the control module 13 controls the third valve 33 to connect the engine heating water circuit 41 and the warm air water circuit 31, so that the heat of the battery 12 is transferred from the battery hot water exchange circuit 10 to the motor cooling water circuit 22, the warm air water circuit 31 and the engine cooling water circuit 42 in sequence, so that the heat of the battery 12 can be transferred to the warm air core through the warm air water circuit 31, providing heat for the warm air core and improving the recovery rate of heat energy; and the second cooling element 44 can cool the battery 12, which is beneficial to ensure that the battery 12 can operate within the set temperature.

[0058] Optionally, in pure electric mode, when the temperature in the battery hot water exchange circuit 10 is greater than the set temperature, the control module 13 controls the third valve 33 to connect the engine heating water circuit 41 and the warm air water circuit 31, so that the heat of the battery 12 is transferred from the battery hot water exchange circuit 10 to the motor 27 hot water circuit, the warm air water circuit 31 and the engine heating water circuit 41 in sequence, so that the heat of the battery 12 can be transferred to the heater core through the warm air water circuit 31 to provide heat for the heater core, and the heat of the battery 12 can be transferred to the engine 48 through the engine heating water circuit 41 to warm up the engine 48, so that when the vehicle enters the hybrid mode, the water temperature of the engine 48 can be increased faster, and energy efficiency can be improved, and emissions during the cold start process can be reduced.

[0059] In one embodiment, the vehicle thermal management system also includes an air conditioning refrigerant circuit 51, which is used to exchange heat with an air conditioning compressor 52. A reversing valve 53 is provided on the air conditioning refrigerant circuit 51, and the reversing valve 53 is electrically connected to the control module 13. The reversing valve 53 is used to change the refrigerant flow direction so that the air conditioning compressor 52 can switch between heating and cooling. The air conditioning refrigerant circuit 51 is partially attached to the motor circuit 20 and the battery hot water exchange circuit 10, respectively, so that heat can be transferred between the air conditioning refrigerant circuit 51, the motor circuit 20 and the battery hot water exchange circuit 10, which is conducive to improving the recovery rate of heat energy, thereby improving the economy of the vehicle. When the control module 13 controls the second valve 25 to close and controls the fourth valve 14 to isolate the motor circuit 20 and the battery hot water exchange circuit 10, the control module 13 controls the air conditioning refrigerant circuit 51 to cool, and controls the air conditioning refrigerant circuit 51 and the battery hot water exchange circuit 10 to attach and exchange heat.

[0060] Optionally, the air conditioning refrigerant circuit 51 is provided with a first electronic valve 55, a second electronic valve 56 and an in-vehicle heat exchanger 54. When at least one of the first electronic valve 55 and the second electronic valve 56 is connected, the air conditioning refrigerant circuit 51 is connected. The first electronic valve 55, the second electronic valve 56 and the in-vehicle heat exchanger 54 are all electrically connected to the control module 13. The first electronic valve 55 is located at the joint of the air conditioning refrigerant circuit 51 and the motor circuit 20. The in-vehicle heat exchanger 54 is used to exchange heat with the cockpit. The second electronic valve 56 is used to control the connection or disconnection of the in-vehicle heat exchanger 54 and the air conditioning refrigerant circuit 51. A water-cooled condenser 57 is provided at the joint of the air conditioning refrigerant circuit 51 and the motor circuit 20. The motor circuit 20 is provided with a sixth valve 26. The sixth valve 26 controls the connection or disconnection of the water-cooled condenser 57 and the motor circuit 20, so that heat is transferred between the air conditioning refrigerant circuit 51 and the motor circuit 20. The sixth valve 26 is electrically connected to the control module 13. A battery cooler 16 is provided at the joint between the air conditioning refrigerant circuit 51 and the battery hot water exchange circuit 10 , so that heat is transferred between the air conditioning refrigerant circuit 51 and the battery hot water exchange circuit 10 .

[0061] Optionally, when the cab controls the in-vehicle heat exchanger 54 to cool, the second electronic valve 56 is connected, and the control module 13 controls the reversing valve 53 to cool the air-conditioning compressor 52. When the temperature in the battery hot water exchange circuit 10 is greater than the set temperature, the control module 13 controls the first electronic valve 55 to be connected, so that the air-conditioning refrigerant circuit 51 can cool the battery hot water exchange circuit 10, thereby cooling the battery 12; when the temperature in the battery hot water exchange circuit 10 is less than or equal to the set temperature, the control module 13 controls the first electronic valve 55 to be disconnected to avoid heat exchange between the battery hot water exchange circuit 10 and the air-conditioning refrigerant circuit 51, when the temperature of the motor circuit 20 is less than the working temperature of the motor 27, the control module 13 controls the sixth valve 26 to be disconnected to avoid heat exchange between the motor circuit 20 and the air-conditioning refrigerant circuit 51, and when the temperature of the motor circuit 20 is greater than or equal to the working temperature of the motor 27, the control module 13 controls the sixth valve 26 to be connected, so that the air-conditioning refrigerant circuit 51 can cool the motor circuit 20, thereby cooling the motor 27.

[0062] Optionally, when the cab controls the in-vehicle heat exchanger 54 to heat, the second electronic valve 56 is connected, and the control module 13 controls the reversing valve 53 to heat the air conditioning compressor 52. When the temperature in the battery hot water exchange circuit 10 is greater than the set temperature, the control module 13 controls the first electronic valve 55 to be disconnected to prevent the battery hot water exchange circuit 10 and the air conditioning refrigerant circuit 51 from exchanging heat; when the temperature in the battery hot water exchange circuit 10 is less than or equal to the set temperature, the control module 13 controls the first electronic valve 55 to be connected, so that the air conditioning refrigerant circuit 51 can heat the battery hot water exchange circuit 10, thereby heating the battery 12, when the temperature of the motor circuit 20 is less than the working temperature of the motor 27, the control module 13 controls the sixth valve 26 to be connected, so that the air conditioning refrigerant circuit 51 can heat the motor circuit 20, thereby heating the motor 27, when the temperature of the motor circuit 20 is greater than or equal to the working temperature of the motor 27, the control module 13 controls the sixth valve 26 to be disconnected to prevent the motor circuit 20 and the air conditioning refrigerant circuit 51 from exchanging heat.

[0063] Optionally, when the cab does not need the in-vehicle heat exchanger 54 to work, the second electronic valve 56 is disconnected. The control module 13 controls the first electronic valve 55 to be connected. When the temperature in the battery hot water circuit 10 is greater than the set temperature, the control module 13 controls the reversing valve 53 to allow the air conditioning compressor 52 to cool. When the temperature of the motor circuit 20 is lower than the working temperature of the motor 27, the control module 13 controls the sixth valve 26 to be disconnected to prevent the motor circuit 20 from exchanging heat with the air conditioning refrigerant circuit 51. When the temperature of the motor circuit 20 is greater than or equal to the working temperature of the motor 27, the control module 13 controls the sixth valve 26 to be connected so that the air conditioning refrigerant circuit 51 can cool the motor circuit 20, thereby The motor 27 is cooled down; when the temperature in the battery water exchange hot water circuit 10 is less than or equal to the set temperature, the control module 13 controls the reversing valve 53 to enable the air-conditioning compressor 52 to heat. When the temperature of the motor circuit 20 is lower than the operating temperature of the motor 27, the control module 13 controls the sixth valve 26 to be connected, so that the air-conditioning refrigerant circuit 51 can heat the motor circuit 20, thereby heating the motor 27. When the temperature of the motor circuit 20 is greater than or equal to the operating temperature of the motor 27, the control module 13 controls the sixth valve 26 to be disconnected to avoid heat exchange between the motor circuit 20 and the air-conditioning refrigerant circuit 51.

[0064] In the description of this specification, the description with reference to the terms "embodiment", "specific embodiment", "example" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0065] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A vehicle thermal management system, characterized in that: include: A battery hot water exchange circuit, wherein a temperature sensor is provided inside the circuit, and the temperature sensor is used to detect the temperature inside the battery hot water exchange circuit, and the battery hot water exchange circuit is at least partially attached to the battery; A heating circuit, the heating circuit is used to heat the battery water exchange water circuit; A cooling circuit, the cooling circuit is used to cool the battery water heating circuit, the cooling circuit is connected to the heating circuit; A first valve is arranged at the connection point between the cooling circuit and the heating circuit; A control module is electrically connected to the temperature sensor and the first valve, and is used to control the switching of the first valve according to the detection result of the temperature sensor.

2. The vehicle thermal management system according to claim 1, characterized in that: The control module is used to determine that the temperature in the battery hot water exchange circuit is greater than the set temperature, and is also used to control the first valve to connect the cooling circuit and the heating circuit; and / or, the control module is used to determine that the temperature in the battery hot water exchange circuit is less than or equal to the set temperature, and is also used to control the first valve to isolate the cooling circuit and the heating circuit.

3. The vehicle thermal management system according to claim 2, characterized in that: The heating circuit includes a motor heating water circuit, the cooling circuit includes a motor cooling water circuit, the motor cooling water circuit is provided with a first cooling element, the motor heating water circuit is connected to the motor cooling water circuit, and the first valve is arranged at the connection point between the motor heating water circuit and the motor cooling water circuit.

4. The vehicle thermal management system according to claim 3, characterized in that: The motor cooling water circuit and the motor heating water circuit form a motor circuit, and the motor circuit is connected to the battery hot water exchange circuit. A fourth valve is provided at the connection point between the motor circuit and the battery hot water exchange circuit, and the fourth valve is spaced apart from the first valve.

5. The vehicle thermal management system according to claim 4, characterized in that: The cooling circuit also includes an intercooler cooling water circuit, the intercooler cooling water circuit is provided with a third cooling element, the intercooler cooling water circuit is connected to the motor circuit, a fifth valve is provided at the connection between the intercooler cooling water circuit and the motor circuit, the fifth valve is electrically connected to the control module, and the control module is used to control the fifth valve to connect or disconnect the intercooler cooling water circuit and the motor circuit.

6. The vehicle thermal management system according to claim 4, characterized in that: The branch of the motor heating water circuit is connected to the battery hot water exchange circuit, and the connection point between the motor heating water circuit and the battery hot water exchange circuit is connected to the connection point between the battery hot water exchange circuit and the motor circuit. A second valve is provided at the connection point between the motor heating water circuit and the battery hot water exchange circuit, and the second valve is electrically connected to the control module. The control module is used to determine whether the temperature in the battery hot water exchange circuit is greater than or equal to a set temperature, and the control module is used to control the opening of the second valve to bypass the branch of the motor heating water circuit and the battery hot water exchange circuit; and / or, the control module is used to determine whether the temperature in the battery hot water exchange circuit is less than a set temperature, and the control module is used to control the second valve to isolate the branch of the motor heating water circuit from the battery hot water exchange circuit.

7. The vehicle thermal management system according to claim 6, characterized in that: The heating circuit also includes a warm air water circuit, which is provided with a first heating element. The warm air water circuit is partially in contact with the motor heating water circuit, and is used for exchanging heat with the battery water heating circuit through the motor heating water circuit.

8. The vehicle thermal management system according to claim 7, characterized in that: The first valve is arranged at the joint between the motor heating water circuit and the warm air water circuit.

9. The vehicle thermal management system according to claim 7, characterized in that: The heating circuit also includes an engine heating water circuit, and the cooling circuit also includes an engine cooling water circuit. The engine cooling water circuit is provided with a second cooling element. The engine cooling water circuit is connected to the engine heating water circuit. A partition is provided at the connection point between the engine cooling water circuit and the engine heating water circuit. The partition is used to connect or isolate the engine cooling water circuit and the engine heating water circuit.

10. The vehicle thermal management system according to claim 9, characterized in that: The engine heating water circuit is connected to the warm air water circuit, and a third valve is provided at the connection point between the engine heating water circuit and the warm air water circuit. The third valve is electrically connected to the control module, and the control module is used to determine that the temperature in the battery hot water exchange circuit is greater than a set temperature, and the control module is used to control the third valve to isolate the engine heating water circuit and the warm air water circuit; and / or, the control module is used to determine that the temperature in the battery hot water exchange circuit is less than or equal to a set temperature, and the control module is used to control the connection between the engine heating water circuit and the warm air water circuit.

11. The vehicle thermal management system according to any one of claims 4 to 10, characterized in that: The vehicle thermal management system also includes an air-conditioning refrigerant circuit, which is used to exchange heat with the air-conditioning compressor. The air-conditioning refrigerant circuit is respectively partially attached to the motor circuit and the battery hot water exchange circuit. A reversing valve is provided on the air-conditioning refrigerant circuit. The reversing valve is electrically connected to the control module. The reversing valve is used to change the flow direction of the refrigerant so that the air-conditioning compressor can switch between heating and cooling.

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