Thermal management system and electric automobile

Abstract

The utility model relates to a thermal management system and an electric automobile, the thermal management system comprises a heating loop and a refrigerating loop which are connected through a thermal management controller, the heating loop comprises a battery heating loop, a motor heating loop and a controller heating loop, and the battery heating loop and the controller heating loop are connected through the thermal management controller. The motor heating loop and the battery heating loop are connected through at least two three-way connectors, the battery heating loop and the motor heating loop are connected or disconnected through a two-position three-way electromagnetic valve, the battery heating loop is used for heating a battery, and the motor heating loop is used for heating a driving motor. The controller heating loop is used for heating the vehicle body part and the heat management controller; and the refrigerating circuit is used for cooling at least one of the battery, the vehicle body part, the heat management controller and the driving motor. The utility model aims to solve the problem that the charging and discharging performance of a battery is reduced because the temperature of a traditional motor is difficult to control.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal management of electric vehicles, and particularly relates to a thermal management system and an automobile. Background Art

[0002] The thermal management system of a pure electric commercial vehicle manages the heating and cooling of a drive motor, a battery, a controller and a vehicle body. Considering the actual usage conditions, the temperature drop management of the drive motor and the battery is more important than others. When the ambient temperature is relatively low, the MHC module and the battery need to be heated. However, traditional electric heating has difficulties in temperature control, resulting in a reduction in the charge and discharge performance of the battery. Summary of the Utility Model

[0003] Based on the above description, the utility model provides a thermal management system to solve the problem that traditional motor heating has difficulties in temperature control, resulting in a reduction in the charge and discharge performance of the battery.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] A thermal management system includes a heating circuit and a cooling circuit, and the heating circuit and the cooling circuit are connected through a thermal management controller;

[0006] The heating circuit includes: a battery heating circuit, a motor heating circuit and a controller heating circuit. The battery heating circuit and the controller heating circuit are connected through a thermal management controller. The motor heating circuit and the battery heating circuit are connected through at least two three-way joints. The battery heating circuit and the motor heating circuit are communicated or cut off through a two-position three-way solenoid valve. The battery heating circuit is used to raise the temperature of the battery. The motor heating circuit is used to raise the temperature of the drive motor. The controller heating circuit is used to raise the temperature of the vehicle body part and the thermal management controller;

[0007] The cooling circuit is used to cool at least one of the battery, the vehicle body part, the thermal management controller and the drive motor.

[0008] Based on the above technical solution, the utility model can be further improved as follows:

[0009] Further, the motor heating circuit includes a first liquid storage tank, a first water pump, a motor control unit, a drive motor, a first two-position three-way solenoid valve, a first three-way joint, a first radiator and a motor cooling fan connected in sequence.

[0010] Further, the controller heating circuit includes a second liquid storage tank, a second water pump, a heater, a second two-position three-way solenoid valve, a second three-way joint, a second radiator, a blower and a thermal management controller;

[0011] Wherein, the first end of the second liquid storage tank is connected to the second end of the second water pump, the second end of the second liquid storage tank is connected to the second end of the second three-way joint, the third end of the second three-way joint is connected to the first end of the thermal management controller, the second end of the thermal management controller is connected to the second end, the third end of the second two-position three-way solenoid valve and the second end of the second radiator, the first end of the second two-position three-way solenoid valve is connected to the second end of the heater, the first end of the heater is connected to the first end of the second water pump, the first end of the second radiator is connected to the first end of the second three-way joint, and the second radiator is arranged corresponding to the blower.

[0012] Further, the battery heating circuit includes a third liquid storage tank, a third two-position three-way solenoid valve, a third water pump, a third three-way joint, a fourth three-way joint and a battery radiator;

[0013] Wherein, the first end of the third liquid storage tank is connected to the third end of the third two-position three-way solenoid valve, the first end of the third two-position three-way solenoid valve is connected to the fourth end of the thermal management controller, the second end of the third two-position three-way solenoid valve is connected to the second end of the fourth three-way joint, the first end of the fourth three-way joint is connected to the third end of the first two-position three-way solenoid valve, the third end of the fourth three-way joint is connected to the first end of the third water pump, the second end of the third water pump is connected to the second end of the battery radiator, the first end of the battery radiator is connected to the third end of the third three-way joint, the second end of the third three-way joint is connected to the second end of the first three-way joint, and the first end of the third three-way joint is connected to the third end of the thermal management controller.

[0014] Further, the refrigeration circuit includes: a first refrigeration branch and a second refrigeration branch;

[0015] The first refrigeration branch is used to cool the vehicle body part or the drive motor;

[0016] The second refrigeration branch is used to cool the battery or the thermal management controller.

[0017] Further, the first refrigeration branch is a refrigerant circuit between a compressor, a condenser, a first one-way solenoid valve, a first expansion valve, an evaporator and a blower.

[0018] Further, the second refrigeration branch is a refrigerant circuit between a compressor, a condenser, a second one-way solenoid valve, a second expansion valve and a thermal management controller.

[0019] Further, the second refrigeration branch and the battery heating circuit are coupled through a thermal management controller, so that the refrigerant in the second refrigeration branch flows through the battery heating circuit.

[0020] The present utility model also provides an electric vehicle, which includes the thermal management system.

[0021] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0022] The refrigeration circuit cools down when the battery, the vehicle body part, the thermal management controller or the drive motor is working at a high temperature, ensuring the best working performance.

[0023] The battery heating circuit and the controller heating circuit are connected through the thermal management controller. The motor heating circuit and the battery heating circuit are connected through at least two three-way joints. And the battery heating circuit and the motor heating circuit are connected or disconnected through the two-position three-way solenoid valve, so that according to different heating requirements, the drive motor can be heated alone, or the battery and the thermal management controller can be heated, or the thermal management controller and the vehicle body part can be heated, or the drive motor, the battery and the thermal management controller can be heated together. In this way, according to the actual working conditions, the combination is flexible, the energy management is more centralized, the thermal management efficiency is improved, and the battery energy consumption is reduced. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of a thermal management system provided by an embodiment of the present utility model;

[0025] Figure 2 is Figure 1 a schematic structural diagram of the heating circuit in

[0026] Figure 3 is Figure 1 a schematic structural diagram of the refrigeration circuit in

[0027] In the drawings, the list of components represented by each reference numeral is as follows:

[0028] 1. Battery heating circuit; 11. First liquid storage tank; 12. First water pump; 13. Motor control unit; 14. Driving motor; 15. First two-way three-way solenoid valve; 16. First three-way joint; 17. First radiator; 18. Motor cooling fan; 2. Motor heating circuit; 21. Second liquid storage tank; 22. Second water pump; 23. Heater; 24. Second two-way three-way solenoid valve; 25. Second three-way joint; 26. Second radiator; 27. Blower; 28. Thermal management controller; 29. Connecting three-way joint; 3. Controller heating circuit; 31. Third liquid storage tank; 32. Third two-way three-way solenoid valve; 33. Third water pump; 34. Third three-way joint; 35. Fourth three-way joint; 36. Battery radiator; 37. Fourth water pump; 4. First refrigeration branch; 41. Compressor; 42. Condenser; 43. First one-way solenoid valve; 44. First expansion valve; 45. Evaporator; 5. Second refrigeration branch; 51. Second one-way solenoid; 52. Second expansion valve. Detailed implementation manners

[0029] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of the present application in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0031] It can be understood that spatial relationship terms such as "under", "below", "beneath", "underneath", "above", "upper", etc. can be used herein to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that in addition to the orientation shown in the figure, spatial relationship terms also include different orientations of the device during use and operation. For example, if the device in the drawing is flipped, the element or feature described as "under other elements" or "beneath it" or "under it" will be oriented "above" other elements or features. Therefore, the exemplary terms "under" and "below" can include both the upper and lower orientations. In addition, the device may also include other orientations (for example, rotated 90 degrees or other orientations), and the spatial description terms used herein are accordingly interpreted.

[0032] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or connected to the other component through an intermediate component. In the following embodiments, "connection", if there is a transfer of electrical signals or data between the connected circuits, modules, units, etc., should be understood as "electrical connection", "communication connection", etc.

[0033] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising", "including" or "having", etc., specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0034] Referring to Figures 1 to 3 , the present utility model provides a thermal management system, including a heating circuit and a cooling circuit, and the heating circuit and the cooling circuit are connected through a thermal management controller 28.

[0035] The heating circuit includes: a battery heating circuit 1, a motor heating circuit 2 and a controller heating circuit 3. The battery heating circuit 1 and the controller heating circuit 3 are connected through a thermal management controller 28. The motor heating circuit 2 and the battery heating circuit 1 are connected through at least two three-way joints. The battery heating circuit 1 and the motor heating circuit 2 are communicated or cut off through a two-position three-way solenoid valve. The battery heating circuit 1 is used to heat the battery. The motor heating circuit 2 is used to heat the drive motor 14. The controller heating circuit 3 is used to heat the vehicle body part and the thermal management controller 28.

[0036] The cooling circuit is used to cool at least one of the battery, the vehicle body part, the thermal management controller 28 and the drive motor 14.

[0037] The cooling circuit cools when the battery, the vehicle body part, the thermal management controller 28 or the drive motor 14 is working at a high temperature to ensure the best working performance.

[0038] The battery heating circuit 1 and the controller heating circuit 3 are connected through the thermal management controller 28. The motor heating circuit 2 and the battery heating circuit 1 are connected through at least two three-way joints. The battery heating circuit 1 and the motor heating circuit 2 are communicated or cut off by the two-position three-way solenoid valve, so that the drive motor 14 can be heated alone, or the battery and the thermal management controller 28 can be heated, or the thermal management controller 28 and the vehicle body part can be heated, or the drive motor 14, the battery and the thermal management controller 28 can be heated together according to different heating requirements. In this way, according to the actual working conditions, the combination is flexible, the energy management is more centralized, the thermal management efficiency is improved, and the battery energy consumption is reduced.

[0039] Specifically, in this embodiment, referring to Figure 1 and Figure 2 , the motor heating circuit 2 includes a first liquid storage tank 11, a first water pump 12, a motor control unit 13, a drive motor 14, a first two-position three-way solenoid valve 15, a first three-way joint 16, a first radiator 17 and a motor cooling fan 18 connected in sequence. The first liquid storage tank 11 is used to store the coolant. The heated coolant flows through the motor control unit 13, the drive motor 14, the first two-position three-way valve, the first three-way joint 16 and the first radiator 17 in sequence through the first water pump 12 and then flows back into the first liquid storage tank 11, so as to heat the drive motor 14 and the motor control unit 13.

[0040] Specifically, the controller heating circuit 3 includes a second liquid storage tank 21, a second water pump 22, a heater 23, a second two-position three-way solenoid valve 24, a second three-way joint 25, a second radiator 26, a blower 27 and a thermal management controller 28.

[0041] Wherein, the first end of the second liquid storage tank 21 is connected to the second end of the second water pump 22, the second end of the second liquid storage tank 21 is connected to the second end of the second three-way joint 25, the third end of the second three-way joint 25 is connected to the first end of the thermal management controller 28, the second end of the thermal management controller 28 is connected to the second end, the third end of the second two-position three-way solenoid valve 24 and the second end of the second radiator 26, the first end of the second two-position three-way solenoid valve 24 is connected to the second end of the heater 23, the first end of the heater 23 is connected to the first end of the second water pump 22, the first end of the second radiator 26 is connected to the first end of the second three-way joint 25, and the second radiator 26 is arranged corresponding to the blower 27.

[0042] In this embodiment, continue to refer to Figure 1 and Figure 2, the second liquid storage tank 21 is used to store the coolant. The heated coolant sequentially passes through the second water pump 22, the heater 23, the second two-way three-way solenoid valve 24, and the thermal management controller 28 from the first end of the liquid storage tank, and then flows into the second liquid storage tank 21 from the second end of the second three-way joint 25, so as to be able to heat up the thermal management controller 28.

[0043] In this embodiment, referring to Figure 1 and Figure 2 , the second radiator 26 is correspondingly arranged with the heater 23, and the blower 27 is correspondingly arranged with the second radiator 26. The heated coolant sequentially flows through the second radiator 26, the thermal management controller 28 and the second three-way joint 25 from the first end of the second three-way joint 25, and then flows into the second liquid storage tank 21. The blower 27 operates towards the second radiator 26, so as to be able to heat up the body part.

[0044] It should be noted that, in this embodiment, the thermal management controller 28 is an MHC (MPLAB Harmony Configurator) module.

[0045] In addition, the second end of the thermal management controller 28 is connected to the second end, the third end of the second two-way three-way valve and the third end of the heater 23 through two connecting three-way joints 29. The structure is simple and the practicability is strong.

[0046] Specifically, the battery heating circuit 1 includes a third liquid storage tank 31, a third two-way three-way solenoid valve 32, a third water pump 33, a third three-way joint 34, a fourth three-way joint 35 and a radiator.

[0047] Among them, the first end of the third liquid storage tank 31 is connected to the third end of the third two-way three-way solenoid valve 32, the first end of the third two-way three-way solenoid valve 32 is connected to the fourth end of the thermal management controller 28, the second end of the third two-way three-way solenoid valve 32 is connected to the second end of the fourth three-way joint 35, the first end of the fourth three-way joint is connected to the third end of the first two-way three-way solenoid valve 15, the third end of the fourth three-way joint 35 is connected to the first end of the third water pump 33, the second end of the third water pump 33 is connected to the second end of the battery radiator 36, the first end of the battery radiator 36 is connected to the third end of the third three-way joint 34, the second end of the third three-way joint 34 is connected to the second end of the first three-way joint 16, and the first end of the third three-way joint 34 is connected to the third end of the thermal management controller 28.

[0048] In this embodiment, continue to refer to Figure 1 and Figure 2The third liquid storage tank 31 is used to store the coolant. Due to the drive of the third water pump 33, the heated coolant flows out from the second end of the third liquid storage tank 31, passes through the battery radiator 36, flows into the third end of the third three-way joint 34, then flows into the third end of the thermal management controller 28, and then flows into the first end of the third two-position three-way solenoid valve 32 from the fourth end of the thermal management control. At this time, the first end and the third end of the third two-position three-way valve are connected; finally, it flows back into the third liquid storage tank 31 from the third end of the third two-position three-way solenoid valve 32, so as to be able to heat up the battery.

[0049] In summary, when it is necessary to heat up the drive motor 14 alone, the first end and the second end of the first two-position three-way solenoid valve 15 are connected. When it is necessary to heat up the body part and the thermal management controller 28 alone, the first end and the second end of the second two-position three-way solenoid valve 24 are connected. And when the first end and the third end of the second two-position three-way solenoid valve 24 are connected, the heated coolant flowing out from the second liquid storage tank 21 can flow out from the third end of the second two-position three-way solenoid valve 24, and through two connected three-way joints, a part of it is branched into the second radiator 26, and another part is branched into the thermal management controller 28, so as to be able to realize different temperature control of the body part. When it is necessary to heat up the battery alone, the first end and the third end of the third two-position three-way solenoid valve 32 are connected.

[0050] When the first end and the third end of the first two-position three-way solenoid valve 15 are connected, at this time, the first end and the second end of the third two-position three-way solenoid valve 32 are connected. A fourth water pump 37 is connected between the second end of the fourth three-way joint 35 and the fourth section of the thermal management controller 28. The heated coolant flowing out from the first liquid storage tank 11 flows from the third end of the first two-position three-way solenoid valve 15 to the fourth three-way joint 35, and then a part of it is branched to the thermal management controller 28 through the water pump, and another part is branched to the battery radiator 36, and then converges from the third three-way joint 34, and finally flows back into the first liquid storage tank 11 from the first three-way joint 16. However, when the first end and the third end of the third two-position three-way solenoid valve 32 are connected, the heated coolant flowing out from the first liquid storage tank 11 directly flows into the battery radiator 36 through the third water pump 33 from the fourth three-way joint 35. Then, a part of it flows back to the first three-way joint 16 from the third three-way joint 34, and another part is branched to the thermal management controller 28. In this way, different heating requirements of the battery and the thermal management controller 28 can be realized through the third two-position three-way solenoid valve 32. The temperature control of each component is made more accurate, and the system management is efficiently improved.

[0051] In this embodiment, refer to Figures 1 to 3, the refrigeration circuit includes a first refrigeration branch 4 and a second refrigeration branch 5; the first refrigeration branch 4 is used to cool the vehicle body part or the drive motor 14; the second refrigeration branch 5 is used to cool the battery or the thermal management controller 28.

[0052] Specifically, in this embodiment, referring to Figure 3 , the first refrigeration branch 4 is a refrigerant circuit among a compressor 41, a condenser 42, a first one-way solenoid valve 43, a first expansion valve 44, an evaporator 45, and a blower 27. The second refrigeration branch 5 is a refrigerant circuit among the compressor 41, the condenser 42, a second one-way solenoid valve 51, a second expansion valve 52, and the thermal management controller 28.

[0053] The first refrigeration branch 4 and the second refrigeration branch 5 are connected through two three-way joints. The first refrigeration branch 4 and the second refrigeration branch 5 share one compressor 41 and one condenser 42, and both the first refrigeration branch 4 and the second refrigeration branch 5 perform heat exchange on the high-temperature circulating refrigerant through a low-temperature refrigerant to stably cool the drive motor 14, the vehicle body part, the thermal management controller 28, and the battery, thereby improving the refrigeration efficiency.

[0054] In this embodiment, the second refrigeration branch 5 and the battery heating circuit 1 are coupled through the thermal management controller 28, so that the refrigerant in the second refrigeration branch 5 flows through the battery heating circuit 1. Thereby, the battery can be cooled, making the energy management more centralized and the utilization efficiency improved.

[0055] It should be noted that in this utility model, the vehicle VCU (Vehicle Control Unit) is adopted to collect the working temperatures of various parts, and then determine the energization or disconnection of the first two-way three-way solenoid valve 15, the second two-way three-way solenoid valve 24, and the two-way three-way solenoid valve. The combination is more flexible, reducing the electric energy consumption of the whole vehicle, improving the thermal management efficiency of the whole vehicle, and the system structure is simple.

[0056] This utility model also proposes an electric vehicle including the thermal management system as described above. Therefore, the electric vehicle includes all the technical features of the thermal management system, which will not be elaborated here.

[0057] The above are only the preferred embodiments of this utility model, and are not intended to limit this utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this utility model shall be included within the protection scope of this utility model.

Claims

1. A thermal management system, characterized in that: It includes a heating circuit and a cooling circuit, wherein the heating circuit and the cooling circuit are connected via a thermal management controller; The heating circuit includes: a battery heating circuit, an electric heating circuit and a controller heating circuit, the battery heating circuit and the controller heating circuit are connected through a thermal management controller, the electric heating circuit and the battery heating circuit are connected through at least two three-way joints, the battery heating circuit and the electric heating circuit are connected or disconnected through a two-position three-way solenoid valve, the battery heating circuit is used to heat the battery, the electric heating circuit is used to heat the drive motor, and the controller heating circuit is used to heat the vehicle body and the thermal management controller; The refrigeration circuit is used to cool down at least one of the battery, the vehicle body, the thermal management controller and the drive motor.

2. The thermal management system according to claim 1, characterized in that: The motor heating circuit includes a first liquid storage tank, a first water pump, a motor control unit, a drive motor, a first two-position three-way solenoid valve, a first three-way joint, a first radiator and a motor cooling fan which are connected in sequence.

3. The thermal management system according to claim 2, characterized in that: The controller heating circuit includes a second liquid storage tank, a second water pump, a heater, a second two-position three-way solenoid valve, a second three-way connector, a second radiator, a blower and a thermal management controller; Among them, the first end of the second liquid storage tank is connected to the second end of the second water pump, the second end of the second liquid storage tank is connected to the second end of the second three-way joint, the third end of the second three-way joint is connected to the first end of the thermal management controller, the second end of the thermal management controller is connected to the second end, the third end of the second two-position three-way solenoid valve and the second end of the second radiator, the first end of the second two-position three-way solenoid valve is connected to the second end of the heater, the first end of the heater is connected to the first end of the second water pump, the first end of the second radiator is connected to the first end of the second three-way joint, and the second radiator and the blower are arranged correspondingly.

4. The thermal management system according to claim 3, characterized in that: The battery heating circuit includes a third liquid storage tank, a third two-position three-way solenoid valve, a third water pump, a third three-way connector and a fourth three-way connector, and a battery radiator; Among them, the first end of the third liquid storage tank is connected to the third end of the third two-position three-way solenoid valve, the first end of the third two-position three-way solenoid valve is connected to the fourth end of the thermal management controller, the second end of the third two-position three-way solenoid valve is connected to the second end of the fourth three-way joint, the first end of the fourth three-way joint is connected to the third end of the first two-position three-way solenoid valve, the third end of the fourth three-way joint is connected to the first end of the third water pump, the second end of the third water pump is connected to the second end of the battery radiator, the first end of the battery radiator is connected to the third end of the third three-way joint, the second end of the third three-way joint is connected to the second end of the first three-way joint, and the first end of the third three-way joint is connected to the third end of the thermal management controller.

5. The thermal management system according to claim 1, characterized in that: The refrigeration circuit comprises: a first refrigeration branch and a second refrigeration branch; The first cooling branch is used to cool the vehicle body or the drive motor; The second refrigeration branch is used to cool the battery or the thermal management controller.

6. The thermal management system according to claim 5, characterized in that: The first refrigeration branch is a refrigerant circuit between the compressor, the condenser, the first one-way solenoid valve, the first expansion valve, the evaporator and the blower.

7. The thermal management system according to claim 6, characterized in that: The second refrigeration branch is a refrigerant circuit between the compressor, the condenser, the second one-way solenoid valve, the second expansion valve and the thermal management controller.

8. The thermal management system according to claim 7, characterized in that: The second refrigeration branch and the battery heating circuit are coupled via a thermal management controller so that the refrigerant in the second refrigeration branch flows through the battery heating circuit.

9. An electric vehicle, characterized in that: The electric vehicle comprises a thermal management system as described in any one of claims 1-8.

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