Thermal management system and method of new energy vehicle

Abstract

The invention discloses a thermal management system and method for a new energy vehicle. The method relates to the technical field of new energy vehicles, a plurality of heat management loops and a heat management controller are included, the heat management loops conduct heat transfer through fluid assemblies, and the heat management loops comprise at least two of a preset assembly heat management loop, a battery heat management loop and a cabin heat management loop. The thermal management controller is connected with the plurality of thermal management loops and the fluid assembly; the cabin heat management loop is used for cooling or heating a cabin of the new energy vehicle; the heat management controller is used for controlling the working states of the multiple heat management loops and / or the fluid assemblies based on the temperatures of the vehicle assemblies corresponding to the multiple heat management loops. The technical problem that the energy utilization rate of the new energy vehicle is low due to the fact that multiple heat management systems of the new energy vehicle are independent in the related technology is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a thermal management system and method for new energy vehicles. Background Art

[0002] With the rapid development of the new energy industry, more and more users choose new energy vehicles as their means of transportation. Since new energy vehicles need to be equipped with batteries with large power, how to manage the heat of devices such as batteries or controllers in new energy vehicles has become one of the main technical issues in the new energy vehicle industry. However, the multiple heat management systems of new energy vehicles in the related technology are relatively independent, which makes the operation of thermal management of new energy vehicles in the related technology more complicated and leads to low energy utilization of new energy vehicles.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present invention provide a thermal management system and method for a new energy vehicle, so as to at least solve the technical problem of low energy utilization rate of new energy vehicles caused by the independence of multiple thermal management systems of new energy vehicles in related technologies.

[0005] According to one aspect of an embodiment of the present invention, a thermal management system for a new energy vehicle is provided, comprising: a plurality of thermal management circuits and a thermal management controller, wherein heat is transferred between the plurality of thermal management circuits via a fluid component, wherein the plurality of thermal management circuits comprise at least two of the following: a preset component thermal management circuit, a battery thermal management circuit and a cabin thermal management circuit, wherein the thermal management controller is connected to the plurality of thermal management circuits and the fluid component, wherein the preset component thermal management circuit is used to cool a preset component of the new energy vehicle, wherein the preset component comprises at least one of the following: a motor and a controller; the battery thermal management circuit is used to heat or cool the battery of the new energy vehicle; the cabin thermal management circuit is used to cool down or heat up the cabin of the new energy vehicle; and the thermal management controller is used to control the working states of the plurality of thermal management circuits and / or the fluid component based on the temperatures of the vehicle components corresponding to the plurality of thermal management circuits.

[0006] Furthermore, the fluid component between the preset component thermal management circuit and the battery thermal management circuit includes: a four-way valve, wherein the fluid inlet of the preset component thermal management circuit is connected to the first end of the four-way valve, the fluid outlet of the preset component thermal management circuit is connected to the second end of the four-way valve, the fluid outlet of the battery thermal management circuit is connected to the third end of the four-way valve, and the first fluid inlet of the battery thermal management circuit is connected to the fourth end of the four-way valve; wherein the thermal management controller is connected to the four-way valve for controlling the connectivity of the four-way valve based on the temperature of the preset component and the battery.

[0007] Furthermore, the fluid component between the battery thermal management circuit and the cabin thermal management circuit includes: a first heat exchanger, wherein the fluid outlet of the battery thermal management circuit is connected to the first end of the first branch in the first heat exchanger, the fluid inlet of the battery thermal management circuit is connected to the second end of the first branch, the fluid outlet of the cabin thermal management circuit is connected to the first end of the second branch in the first heat exchanger, and the fluid inlet of the cabin thermal management circuit is connected to the second end of the second branch; wherein a thermal management controller is connected to the first heat exchanger for controlling the connectivity of the first heat exchanger based on the temperature of the battery and the cabin.

[0008] Furthermore, the fluid component between the cabin thermal management circuit and the preset component thermal management circuit includes: a four-way valve and a first heat exchanger, wherein the fluid inlet of the preset component thermal management circuit is connected to the first end of the four-way valve, the fluid outlet of the preset component thermal management circuit is connected to the second end of the four-way valve, the third end of the four-way valve is connected to the first end of the first branch in the first heat exchanger, the fourth end of the four-way valve is connected to the second end of the first branch, the fluid outlet of the cabin thermal management circuit is connected to the first end of the second branch in the first heat exchanger, and the fluid inlet of the cabin thermal management circuit is connected to the second end of the second branch; wherein the thermal management controller is connected to the four-way valve and the first heat exchanger, and is used to control the connectivity of the four-way valve and / or the first heat exchanger based on the temperature of the preset component and the cabin.

[0009] Furthermore, the preset component thermal management circuit includes: a first storage device, a fluid inlet of the first storage device is connected to the fluid inlet of the preset component thermal management circuit through the preset component, and the first storage device is used to store the first fluid; a first pump, a fluid inlet of the first pump is connected to the fluid outlet of the first storage device, and the first pump is used to control the flow of the first fluid in the preset component thermal management circuit; a second heat exchanger, a fluid inlet of the second heat exchanger is connected to the fluid outlet of the first pump, a fluid outlet of the second heat exchanger is connected to the fluid outlet of the preset component thermal management circuit, and the second heat exchanger is used to dissipate heat for the first fluid; wherein, a thermal management controller is connected to the first pump and the second heat exchanger, and is used to control the working parameters of the first pump and the second heat exchanger based on the temperature of the preset component.

[0010] Furthermore, the system also includes: a first temperature sensor, arranged at the fluid inlet of the first storage device; a second temperature sensor, arranged at the fluid outlet of the second heat exchanger; wherein, a thermal management controller is connected to the first temperature sensor and the second temperature sensor, and is used to determine the temperature of the preset component based on the temperatures collected by the first temperature sensor and the second temperature sensor.

[0011] Furthermore, the cabin thermal management circuit includes: a cabin cooling circuit, for cooling the cabin; a cabin heating circuit, the fluid inlet of the cabin heating circuit is connected to the fluid inlet of the cabin thermal management circuit, and the fluid outlet of the cabin heating circuit is connected to the fluid outlet of the cabin thermal management circuit, for heating the cabin, and the fluid in the battery thermal management circuit is heated by the fluid component between the battery thermal management circuit and the cabin thermal management circuit; wherein the thermal management controller is connected to the cabin cooling circuit and the cabin heating circuit, and is used to control the working state of the cabin cooling circuit and / or the cabin heating circuit based on the temperature of the cabin.

[0012] Furthermore, the cabin cooling circuit and the battery thermal management circuit share a compressor and a condenser, and the cabin cooling circuit includes: a third heat exchanger, the fluid outlet of the third heat exchanger is connected to the fluid inlet of the compressor, the fluid inlet of the third heat exchanger is connected to the fluid outlet of the condenser through the first expansion valve, the fluid inlet of the condenser is connected to the fluid outlet of the compressor, and the third heat exchanger is used to cool the cabin with the fluid output by the condenser; wherein, the thermal management controller is connected to the third heat exchanger and the first expansion valve, and is used to control the working state of at least one of the third heat exchanger, the compressor and the condenser based on the temperature of the cabin, and / or control the opening of the first expansion valve.

[0013] Furthermore, the cabin heating circuit includes: a second pump, a fluid inlet of the second pump is connected to the fluid inlet of the cabin heating circuit, for controlling the flow of the second fluid in the cabin heating circuit; a heating device, the fluid inlet of the heating device is connected to the fluid outlet of the second pump, for heating the second fluid; a fourth heat exchanger, the fluid inlet of the fourth heat exchanger is connected to the fluid outlet of the heating device, and the fluid outlet of the fourth heat exchanger is connected to the fluid outlet of the cabin heating circuit, for heating the cabin and heating the fluid in the battery thermal management circuit; wherein a thermal management controller is connected to the second pump, the heating device and the fourth heat exchanger, for controlling the working state of at least one of the second pump, the heating device and the fourth heat exchanger based on the temperature of the cabin.

[0014] Furthermore, the cabin cooling circuit and the battery thermal management circuit share a compressor and a condenser, and the battery thermal management circuit includes: a second storage device for storing a third fluid; a third pump, the fluid inlet of the third pump is connected to the fluid outlet of the second storage device, the second fluid inlet of the battery thermal management circuit and the second fluid inlet of the battery thermal management circuit, the liquid outlet of the third pump is connected to the liquid outlet of the battery thermal management circuit through the battery, and the third pump is used to control the flow of the third fluid in the battery thermal management circuit; a fifth heat exchanger, including: a third branch and a fourth branch, the first end of the third branch is connected to the fluid of the battery thermal management circuit The inlet of the third branch is connected, the second end of the third branch is connected to the fluid inlet of the second storage device, the first end of the fourth branch is connected to the fluid inlet of the compressor, the second end of the fourth branch is connected to the fluid outlet of the condenser through the second expansion valve, the fluid inlet of the condenser is connected to the fluid outlet of the compressor, and the fifth heat exchanger is used to exchange heat between the third branch and the fourth branch; wherein the thermal management controller is connected to the third pump, the fifth heat exchanger and the second expansion valve, and is used to control the working state of the compressor, the condenser, the third pump and / or the fifth heat exchanger based on the temperature of the battery, and / or control the opening of the second expansion valve.

[0015] Furthermore, the battery thermal management circuit includes: a three-way valve, a first end of the three-way valve is connected to the battery, a second end of the three-way valve is connected to a third end of the four-way valve, and the third end of the three-way valve is connected to the second end of the second branch in the first heat exchanger; wherein, a thermal management controller is connected to the three-way valve, and is used to control the opening of the three-way valve based on the temperature of the battery.

[0016] Furthermore, the system also includes: a third temperature sensor, arranged at the fluid outlet of the third pump; a fourth temperature sensor, arranged at the liquid outlet of the battery thermal management circuit; wherein the thermal management controller is connected to the third temperature sensor and the fourth temperature sensor, and is used to determine the temperature of the battery based on the temperatures collected by the third temperature sensor and the fourth temperature sensor.

[0017] According to another aspect of an embodiment of the present invention, a thermal management method for a new energy vehicle is provided, which is applied to the thermal management system of the above-mentioned new energy vehicle, and includes: collecting the temperatures of vehicle components corresponding to multiple thermal management circuits; and controlling the working states of multiple thermal management circuits and / or fluid components based on the temperatures of the vehicle components.

[0018] Furthermore, in the case where multiple thermal management circuits include a preset component thermal management circuit and a battery thermal management circuit, based on the temperature of the vehicle component, the operating states of the multiple thermal management circuits and / or fluid components are controlled, including: when the temperature of the preset component is greater than or equal to the preset component temperature, and the temperature of the battery is within the preset battery temperature range, the first end of the four-way valve is controlled to be connected to the second end, and the preset component thermal management circuit is controlled to operate; when the temperature of the preset component is less than the preset component temperature, and the temperature of the battery is greater than or equal to the maximum value of the preset battery temperature range, the third end of the four-way valve is controlled to be connected to the fourth end, and the battery thermal management circuit, the compressor and the condenser are controlled to operate; when the temperature of the preset component is greater than or equal to the preset component temperature, and the temperature of the battery is greater than or equal to the maximum value of the preset battery temperature range, the first end of the four-way valve is controlled to be connected to the third end, and the second end of the four-way valve is controlled to be connected to the fourth end, the preset component thermal management circuit and the battery thermal management circuit are controlled to operate, and the compressor and the condenser are controlled to stop operating.

[0019] Furthermore, in the case where multiple thermal management circuits include a battery thermal management circuit and a cabin thermal management circuit, the operating states of the multiple thermal management circuits and / or fluid components are controlled based on the temperature of the vehicle components, including: when the temperature of the battery is lower than the minimum value of a preset battery temperature range, controlling the battery thermal management circuit, the cabin thermal management circuit and the first heat exchanger to operate; when the temperature of the cabin is lower than the minimum value of the preset cabin temperature range, controlling the cabin thermal management circuit to operate; when the temperature of the cabin is higher than the maximum value of the preset cabin temperature range, controlling the cabin thermal management circuit, the compressor and the condenser to operate.

[0020] According to another aspect of an embodiment of the present invention, there is further provided an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the method in each embodiment of the present invention is executed when the program is running.

[0021] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0022] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0023] According to another aspect of the embodiments of the present invention, a computer program is provided. When the computer program is executed by a processor, the methods in the embodiments of the present invention are implemented.

[0024] In an embodiment of the present invention, multiple thermal management circuits and thermal management controllers are adopted. By arranging fluid components between the multiple thermal management circuits, the preset components, batteries and cabin are cooled or heated accordingly through at least two thermal management circuits among the preset component thermal management circuit, the battery thermal management circuit and the cabin thermal management circuit, and the specific temperature and the working state of the thermal management circuit or the fluid component are controlled by the thermal management controller. The present application uses fluid components between the multiple thermal management circuits to enable the multiple thermal management circuits to exchange heat with each other, effectively reducing the independence of the multiple thermal management circuits of the new energy vehicle, achieving the purpose of simplifying the thermal management system of the new energy vehicle, and significantly reducing the number of components of the thermal management system of the new energy vehicle, thereby achieving the technical effect of reducing the failure rate of the thermal management system of the new energy vehicle, and further solving the technical problem of low energy utilization rate of new energy vehicles caused by the relative independence of the multiple thermal management systems of the new energy vehicle in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 is a schematic structural diagram of an optional thermal management system for a new energy vehicle according to an embodiment of the present invention;

[0027] Figure 2 is a schematic structural diagram of a preferred thermal management system for a new energy vehicle according to an embodiment of the present invention;

[0028] Figure 3 is a schematic structural diagram of another preferred thermal management system for new energy vehicles according to an embodiment of the present invention;

[0029] Figure 4 is a flow chart of an optional thermal management method for a new energy vehicle according to an embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of an optional working mode of multiple thermal management circuits with compressors and condensers stopped according to an embodiment of the present invention;

[0031] Figure 6 is a schematic diagram of a working mode of multiple thermal management circuits in which a compressor and a condenser start working according to an optional embodiment of the present invention;

[0032] Figure 7 is a schematic diagram of another optional working mode of multiple thermal management circuits with the compressor and condenser stopped according to an embodiment of the present invention;

[0033] Figure 8 It is a schematic diagram of another optional working mode of multiple thermal management circuits for starting the operation of the compressor and the condenser according to an embodiment of the present invention.

[0034] The above drawings include the following reference numerals:

[0035] 11. Thermal management controller; 12. Fluid assembly; 111. Preset assembly thermal management circuit; 112. Battery thermal management circuit; 113. Cabin thermal management circuit; 21. Water-to-water heat exchanger; 22. Three-way valve; 221. First end of the three-way valve; 222. Second end of the three-way valve; 223. Third end of the three-way valve; 23. Four-way valve; 24. Battery; 25. Motor; 26. Controller; 211. First end of the first branch; 212. Second end of the first branch; 213. First end of the second branch; 214. Second end of the second branch; 231. First end of the four-way valve; 232. Second end of the four-way valve; 233. Four-way valve; 24. Battery; 25. Motor; 26. Controller; 211. First end of the first branch; 212. Second end of the first branch; 213. First end of the second branch; 214. Second end of the second branch; 231. First end of the four-way valve; 232. Second end of the four-way valve; 233. The third end of the four-way valve; 234, the fourth end of the four-way valve; 311, the controller expansion kettle; 312, the first pump; 313, the low-temperature radiator; 314, the cooling fan; 315, the first temperature sensor; 316, the second temperature sensor; 321, the evaporator; 322, the compressor; 323, the condenser; 324, the first expansion valve; 325, the blower; 326, the second pump; 327, the positive temperature coefficient heating element; 328, the warm core; 331, the battery expansion kettle; 332, the third pump; 333, the plate heat exchanger; 334, the second expansion valve; 335, the third temperature sensor; 336 the fourth temperature sensor. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0040] Figure 1 is a schematic structural diagram of an optional thermal management system for a new energy vehicle according to an embodiment of the present invention, wherein: Figure 1 It only shows the situation that multiple thermal management circuits include a preset component thermal management circuit, a battery thermal management circuit and a cabin thermal management circuit, and technical personnel in the field should be clear that multiple thermal management circuits include any two or more of the preset component thermal management circuit, the battery thermal management circuit and the cabin thermal management circuit are also within the protection scope of this application, such as Figure 1 As shown, the system includes: multiple thermal management circuits and a thermal management controller 11, heat is transferred between the multiple thermal management circuits through a fluid component 12, the multiple thermal management circuits include at least two of the following: a preset component thermal management circuit 111, a battery thermal management circuit 112 and a cabin thermal management circuit 113, the thermal management controller 11 is connected to the multiple thermal management circuits and the fluid component 12, wherein the preset component thermal management circuit 111 is used to cool the preset components of the new energy vehicle, wherein the preset components include at least one of the following: a motor and a controller; the battery thermal management circuit 112 is used to heat or cool the battery of the new energy vehicle; the cabin thermal management circuit 113 is used to cool down or heat up the cabin of the new energy vehicle; the thermal management controller 12 is used to control the working states of the multiple thermal management circuits and / or fluid components based on the temperatures of the vehicle components corresponding to the multiple thermal management circuits.

[0041] The above-mentioned new energy vehicles refer to vehicles that require temperature control of components such as internal batteries, motors, controllers or cabins, including but not limited to electric vehicles, electric trucks, electric buses, hybrid vehicles, hybrid trucks, hybrid buses, etc.

[0042] The above-mentioned multiple thermal management circuits refer to circuits used to control the temperature of the internal battery, cabin or preset components of the new energy vehicle, wherein the temperature of the internal battery, cabin or preset components of the new energy vehicle is controlled by coolant in the above-mentioned multiple thermal management circuits.

[0043] The above-mentioned thermal management controller refers to a device used to control the working status of multiple thermal management circuits and / or fluid components. The working status of the equipment in the thermal management system of the new energy vehicle is switched through the above-mentioned thermal management controller, and the flow rate and flow direction of the coolant are adjusted by the thermal management controller so that the temperature of the vehicle components corresponding to the multiple thermal management circuits meets the user's requirements. Among them, the above-mentioned thermal management controller can be a control unit with an integrated central processing unit or a single-chip microcomputer, or it can be an external device such as a mobile phone, computer or tablet. Users can choose according to their needs.

[0044] The above-mentioned fluid components refer to components for transferring heat between multiple thermal management circuits or for controlling the flow direction and flow rate of the coolant, including but not limited to: four-way valves, water-to-water heat exchangers, etc., wherein the above-mentioned fluid can also be gas. In the present application, the fluid is cooling water.

[0045] The above-mentioned preset components refer to the devices that are pre-set inside the vehicle and need to be temperature controlled. In the present application, the above-mentioned preset components include but are not limited to: motors, controllers, etc.

[0046] The above-mentioned preset component thermal management circuit refers to a thermal management circuit used to control the temperature of the preset component. In the present application, the preset component thermal management circuit is generally used to cool the motors, controllers and other equipment in new energy vehicles to prevent motor failure or controller failure caused by excessive temperature.

[0047] The above-mentioned batteries refer to batteries that require thermal management in new energy vehicles, including but not limited to: power batteries, starting batteries, fuel cells, auxiliary batteries or backup batteries of new energy vehicles and other batteries that require thermal management.

[0048] The above-mentioned battery thermal management circuit refers to a thermal management circuit that controls the temperature of the power battery, starting battery, fuel cell, auxiliary battery or backup battery in the new energy vehicle. In the present application, the power battery, starting battery, fuel cell, auxiliary battery or backup battery in the new energy vehicle is heated or cooled through the battery thermal management circuit.

[0049] The above-mentioned cabin thermal management circuit refers to a thermal management circuit that controls the temperature of the cabin in new energy vehicles. In the present application, the cabin is heated or cooled by the cabin thermal management circuit to enhance the user experience and save energy.

[0050] In an optional embodiment, the thermal management system of a new energy vehicle includes a preset component thermal management circuit, a battery thermal management circuit, a cabin thermal management circuit and a thermal management controller, the battery thermal management circuit, the battery thermal management circuit and the cabin thermal management circuit are respectively connected to the thermal management controller, and the thermal management controller is also connected to the fluid component. The battery thermal management circuit and the cabin thermal management circuit are connected through a fluid component water-to-water heat exchanger, so that the cabin thermal management circuit and the battery thermal management circuit can exchange heat through the water-to-water heat exchanger, so that the interior of the cabin can be heated up by the heat of the battery. The battery thermal management circuit and the preset component thermal management circuit can be connected through a fluid component four-way valve, so that the coolant in the battery thermal management circuit can circulate with the coolant in the preset component thermal management circuit, so that the battery and the preset component can be cooled at the same time. The above-mentioned preset component includes a motor and a controller, and the motor and the controller are cooled through the preset component thermal management circuit.

[0051] In another optional embodiment, the thermal management system of the new energy vehicle includes a preset component thermal management circuit, a battery thermal management circuit, a cabin thermal management circuit and a thermal management controller, wherein the preset component thermal management circuit, the battery thermal management circuit and the cabin thermal management circuit are respectively connected to the thermal management controller, and the thermal management controller is also connected to the fluid component. The battery thermal management circuit and the cabin thermal management circuit are connected through a fluid component: a plate heat exchanger, so that the cabin thermal management circuit and the battery thermal management circuit can exchange heat through the plate, so that the cabin interior can be heated by the battery heat. The battery thermal management circuit and the preset component thermal management circuit can be connected through a fluid component: two three-way valves, so that the coolant in the battery thermal management circuit can circulate with the coolant in the preset component thermal management circuit, so that the battery and the preset component can be cooled at the same time. The above-mentioned preset component includes a motor and a controller, and the motor and the controller are cooled through the preset component thermal management circuit. Among them, the plate heat exchanger can also be replaced with a shell and tube heat exchanger, a spiral plate heat exchanger or a tube-fin heat exchanger, etc.

[0052] In another optional embodiment, the thermal management system of the new energy vehicle includes any two thermal management circuits of the preset component thermal management circuit, the battery thermal management circuit and the cabin thermal management circuit. Taking the preset component thermal management circuit and the battery thermal management circuit as examples, the thermal management system of the new energy vehicle includes: a preset component thermal management circuit, a battery thermal management circuit and a thermal management controller. The preset component thermal management circuit and the battery thermal management circuit are respectively connected to the thermal management controller. A four-way valve for heat exchange between the battery thermal management circuit and the preset component thermal management circuit is provided between the battery thermal management circuit and the preset component thermal management circuit. The thermal management controller is also connected to the four-way valve. The above-mentioned preset component includes a motor and a controller, and the motor and the controller are cooled by the preset component thermal management circuit. Among them, the four-way valve can be replaced by two three-way valves.

[0053] For example, Figure 2 is a schematic diagram of a preferred thermal management system for a new energy vehicle according to an embodiment of the present invention. Figure 2 As shown, a water-to-water heat exchanger 21 is used as a fluid component between the battery thermal management circuit 112 and the cabin thermal management circuit 113, and a four-way valve 23 is used as a fluid component between the battery thermal management circuit 112 and the preset component thermal management circuit 111. The preset component thermal management circuit 111 is used to cool the motor 25 and the controller 26, the battery thermal management circuit 112 is used to cool or heat the battery 24, and the cabin thermal management circuit 113 is used to heat up or cool down the cabin. The water-to-water heat exchanger 21 allows the interior of the cabin to be heated by the heat of the battery 24, the three-way valve 22 disconnects the heat exchange between the battery thermal management circuit 112 and the cabin thermal management circuit 113, and the four-way valve 23 allows the coolant in the battery thermal management circuit 112 to circulate with the coolant in the preset component thermal management circuit 111, so that the battery 24, the motor 25 and the controller 26 can be cooled at the same time.

[0054] In the present application, by setting up fluid components, heat exchange can be carried out between the battery thermal management circuit, the cabin thermal management circuit and the preset component thermal management circuit, thereby reducing the number of devices in the thermal management system of new energy vehicles, effectively reducing the complexity of the thermal management system of new energy vehicles, reducing the failure rate of the thermal management system of new energy vehicles, and improving the user experience.

[0055] Optionally, the fluid component between the preset component thermal management circuit and the battery thermal management circuit includes: a four-way valve, wherein the fluid inlet of the preset component thermal management circuit is connected to the first end of the four-way valve, the fluid outlet of the preset component thermal management circuit is connected to the second end of the four-way valve, the fluid outlet of the battery thermal management circuit is connected to the third end of the four-way valve, and the first fluid inlet of the battery thermal management circuit is connected to the fourth end of the four-way valve; wherein the thermal management controller is connected to the four-way valve for controlling the connectivity of the four-way valve based on the temperature of the preset component and the battery.

[0056] In an optional embodiment, if Figure 2 As shown, the preset component thermal management loop 111 and the battery thermal management loop 112 are connected through the four-way valve 23, the fluid inlet of the preset component thermal management loop 111 is connected to the first end 231 of the four-way valve, the fluid outlet of the preset component thermal management loop 111 is connected to the second end 232 of the four-way valve, the fluid outlet of the battery thermal management loop 112 is connected to the third end 233 of the four-way valve, the first fluid inlet of the battery thermal management loop 112 is connected to the fourth end 234 of the four-way valve, and the coolant in the battery thermal management loop 112 flows into the four-way valve through the three-way valve. The third end 233 of the four-way valve 23 flows back to the battery thermal management circuit 112 through the fourth end 234 of the four-way valve. The coolant in the thermal management circuit 111 of the preset component flows into the four-way valve through the second end 232 of the four-way valve, and then flows back to the thermal management circuit 111 of the preset component through the first end 231 of the four-way valve. When the third end 233 of the four-way valve is connected to the first end 231 of the four-way valve, and the second end 232 of the four-way valve is connected to the fourth end 234 of the four-way valve, the coolant in the thermal management circuit 111 of the preset component is interconnected with the coolant in the thermal management circuit 112 of the battery. The thermal management controller is also connected to the four-way valve 23, and is used to control the connection state of the four-way valve 23 based on the temperature of the motor 25 and the controller 26.

[0057] In the present application, by setting a four-way valve, the thermal management controller can be used to control whether the preset component thermal management circuit and the battery thermal management circuit are connected, so as to cool the battery, motor and controller at the same time, effectively reducing the number of devices in the thermal management system of new energy vehicles, effectively reducing the complexity of the thermal management system of new energy vehicles, reducing the failure rate of the thermal management system of new energy vehicles, and improving the user experience.

[0058] Optionally, the fluid component between the battery thermal management circuit and the cabin thermal management circuit includes: a first heat exchanger, wherein the fluid outlet of the battery thermal management circuit is connected to the first end of the first branch in the first heat exchanger, the fluid inlet of the battery thermal management circuit is connected to the second end of the first branch, the fluid outlet of the cabin thermal management circuit is connected to the first end of the second branch in the first heat exchanger, and the fluid inlet of the cabin thermal management circuit is connected to the second end of the second branch; wherein a thermal management controller is connected to the first heat exchanger for controlling the connectivity of the first heat exchanger based on the temperature of the battery and the cabin.

[0059] The above-mentioned first heat exchanger refers to a device used to exchange the temperature of the coolant in the battery thermal management circuit and the coolant in the cabin thermal management circuit, wherein the first heat exchanger includes but is not limited to: water-to-water heat exchanger, plate heat exchanger, shell and tube heat exchanger, spiral plate heat exchanger or tube-fin heat exchanger, etc.

[0060] In an optional embodiment, if Figure 2 As shown, the water-to-water heat exchanger 21 is used as the first heat exchanger, and heat exchange between the coolant in the battery thermal management circuit 112 and the coolant in the cabin thermal management circuit 113 is realized through the water-to-water heat exchanger 21. The coolant outlet of the battery thermal management circuit 112 is connected to the first end 211 of the first branch in the water-to-water heat exchanger 21, the coolant inlet of the battery thermal management circuit 112 is connected to the second end 212 of the first branch in the water-to-water heat exchanger 21, the coolant outlet of the cabin thermal management circuit 113 is connected to the first end 213 of the second branch in the water-to-water heat exchanger 21, and the coolant inlet of the cabin thermal management circuit 113 is connected to the second end 214 of the second branch in the water-to-water heat exchanger 21. The coolant of the battery thermal management circuit 112 flows into the water-to-water heat exchanger 21 through the first end 211 of the first branch in the water-to-water heat exchanger 21. After the coolant completes heat exchange in the water-to-water heat exchanger 21, it flows back to the battery thermal management circuit 112 through the second end 212 of the first branch in the water-to-water heat exchanger 21. The coolant of the cabin thermal management circuit 113 flows into the water-to-water heat exchanger 21 through the first end 213 of the second branch in the water-to-water heat exchanger 21. After the coolant completes heat exchange in the water-to-water heat exchanger 21, it flows back to the cabin thermal management circuit 113 through the second end 214 of the second branch in the water-to-water heat exchanger 21. The thermal management controller is connected to the water-to-water heat exchanger and is used to control the connectivity of the water-to-water heat exchanger based on the battery 24 and the cabin temperature.

[0061] In the present application, a water-to-water heat exchanger is used to heat up the cabin of a new energy vehicle by using the battery temperature, thereby effectively reducing the number of devices in the thermal management system of the new energy vehicle, effectively reducing the complexity of the thermal management system of the new energy vehicle, reducing the failure rate of the thermal management system of the new energy vehicle, and improving the user experience.

[0062] Optionally, the fluid component between the cabin thermal management circuit and the preset component thermal management circuit includes: a four-way valve and a first heat exchanger, wherein the fluid inlet of the preset component thermal management circuit is connected to the first end of the four-way valve, the fluid outlet of the preset component thermal management circuit is connected to the second end of the four-way valve, the third end of the four-way valve is connected to the first end of the first branch in the first heat exchanger, the fourth end of the four-way valve is connected to the second end of the first branch, the fluid outlet of the cabin thermal management circuit is connected to the first end of the second branch in the first heat exchanger, and the fluid inlet of the cabin thermal management circuit is connected to the second end of the second branch; wherein the thermal management controller is connected to the four-way valve and the first heat exchanger, and is used to control the connectivity state of the four-way valve and / or the first heat exchanger based on the temperature of the preset component and the cabin.

[0063] In an optional embodiment, if Figure 2 As shown, the water-to-water heat exchanger 21 is used as the first heat exchanger, and the fluid component between the cabin thermal management circuit 111 and the preset component thermal management circuit 111 includes a four-way valve 23 and a water-to-water heat exchanger 21, the coolant inlet of the preset component thermal management circuit 111 is connected to the first end 231 of the four-way valve, the coolant outlet of the preset component thermal management circuit 111 is connected to the second end 232 of the four-way valve, the third end 233 of the four-way valve is connected to the first end 211 of the first branch of the water-to-water heat exchanger 21, the fourth end 234 of the four-way valve is connected to the second end 212 of the first branch, the coolant outlet of the cabin thermal management circuit 113 is connected to the first end 213 of the second branch of the water-to-water heat exchanger 21, and the coolant inlet of the cabin thermal management circuit 113 is connected to the second end 214 of the second branch of the water-to-water heat exchanger 21. The thermal management controller is connected to the four-way valve 23 and the water-to-water heat exchanger 21 , and is used to control the connection state of the four-way valve and / or the water-to-water heat exchanger 21 based on the cabin, the motor 25 and the controller 26 .

[0064] In the present application, by setting a four-way valve and a water-to-water heat exchanger, it is possible to exchange heat between the cabin thermal management circuit and the coolant temperature of the preset component thermal management circuit, thereby effectively reducing the number of devices in the thermal management system of new energy vehicles, effectively reducing the complexity of the thermal management system of new energy vehicles, reducing the failure rate of the thermal management system of new energy vehicles, and improving the user experience.

[0065] Optionally, the preset component thermal management circuit includes: a first storage device, a fluid inlet of the first storage device is connected to the fluid inlet of the preset component thermal management circuit through the preset component, and the first storage device is used to store a first fluid; a first pump, a fluid inlet of the first pump is connected to the fluid outlet of the first storage device, and the first pump is used to control the flow of the first fluid in the preset component thermal management circuit; a second heat exchanger, a fluid inlet of the second heat exchanger is connected to the fluid outlet of the first pump, and a fluid outlet of the second heat exchanger is connected to the fluid outlet of the preset component thermal management circuit, and the second heat exchanger is used to dissipate heat for the first fluid; wherein, a thermal management controller is connected to the first pump and the second heat exchanger, and is used to control the working parameters of the first pump and the second heat exchanger based on the temperature of the preset component.

[0066] The above-mentioned first storage device refers to a device for storing coolant in the thermal management circuit of a preset component, wherein the above-mentioned first storage device includes but is not limited to: an expansion tank, an expansion kettle or an expansion water tank and other devices for storing coolant.

[0067] The first pump is a water pump used to pump the first fluid in the first storage device, that is, the first pump is used to pump the coolant in the thermal management loop of the preset component to flow in the thermal management loop of the preset component.

[0068] The first fluid mentioned above refers to the fluid in the thermal management loop of the preset component, including but not limited to: coolant or cooling water in the thermal management loop of the preset component.

[0069] The above-mentioned second heat exchanger refers to a device for dissipating heat for the first fluid, that is, the coolant in the thermal management circuit of the preset component is dissipated by the second heat exchanger to cool the preset component. Since in this application, the preset component is a motor, controller and other equipment, the preset component only needs to dissipate heat, so the second heat exchanger only needs to dissipate heat for the first fluid, wherein the above-mentioned second heat exchanger includes but is not limited to: a low-temperature radiator and a cooling fan, a graphene radiator, a phase change radiator or a water-cooled radiator, etc.

[0070] In an optional embodiment, Figure 3 is a schematic diagram of the structure of another preferred thermal management system for new energy vehicles according to an embodiment of the present invention. Figure 3As shown, the controller expansion kettle 311 is used as the first storage device, and the low-temperature radiator 313 and the heat dissipation fan 314 are used as the second heat exchanger. The preset component thermal management circuit also includes: the controller expansion kettle 311, the first pump 312, the low-temperature radiator 313 and the heat dissipation fan 314. The coolant in the thermal management circuit of the preset component flows into the motor 25 and the controller 26 through the four-way valve 23 to cool the motor 25 and the controller 26, and then flows into the controller expansion kettle 311. The controller expansion kettle 311 is used to store the coolant in the thermal management circuit of the preset component. The coolant in the thermal management circuit of the preset component flows into the first pump 312 after passing through the controller expansion kettle 311. The first pump 312 provides kinetic energy for the coolant in the thermal management circuit of the preset component, and the coolant in the thermal management circuit of the preset component is pumped into the low-temperature radiator 313. The coolant in the thermal management circuit of the preset component is cooled by the heat dissipation fan 314 to cool the motor 25 and the controller 26. The thermal management controller is connected to the first pump 312, the low-temperature radiator 313 and the cooling fan 314. The thermal management controller controls the speed of the first pump 312 and the speed of the cooling fan 314 based on the temperature of the motor 25 and the controller 26, and then controls the temperature of the motor 25 and the controller 26 to meet the user's needs. The low-temperature radiator 313 and the cooling fan 314 can also be replaced by a graphene radiator, a phase change radiator or a water-cooled radiator, etc., and the controller expansion kettle 311 can also be replaced by a controller expansion tank or a controller expansion water tank, etc.

[0071] In the present application, a first storage device is provided to store the coolant in the thermal management loop of the preset component, a first pump is used to provide kinetic energy to the coolant in the thermal management loop of the preset component, and a second heat exchanger is used to dissipate the heat of the coolant in the thermal management loop of the preset component to cool the preset component, thereby effectively improving the efficiency of cooling the preset component and enhancing the user experience.

[0072] Optionally, the system also includes: a first temperature sensor, arranged at the fluid inlet of the first storage device; a second temperature sensor, arranged at the fluid outlet of the second heat exchanger; wherein a thermal management controller is connected to the first temperature sensor and the second temperature sensor, and is used to determine the temperature of the preset component based on the temperatures collected by the first temperature sensor and the second temperature sensor.

[0073] The first temperature sensor is disposed between the first storage device and the preset component, and is used to measure the temperature of the coolant flowing out of the preset component after cooling the preset component in the thermal management circuit of the preset component.

[0074] The second temperature sensor is disposed between the second heat exchanger and the four-way valve, and is used to measure the temperature of the coolant in the thermal management circuit of the preset component that flows into the four-way valve after being cooled by the second heat exchanger.

[0075] In an optional embodiment, if Figure 3 As shown, the controller expansion kettle 311 is used as the first storage device, the low-temperature radiator 313 and the heat dissipation fan 314 are used as the second heat exchanger, and the first temperature sensor 315 is arranged between the controller 26 and the controller expansion kettle 311, wherein the coolant in the thermal management circuit of the preset component flows into the controller expansion kettle 311 after cooling the motor 25 and the controller 26 in succession, and the first temperature sensor 315 measures the coolant flowing out of the controller 26 to measure the coolant temperature after cooling the motor 25 and the controller 26; the second temperature sensor 316 is arranged between the low-temperature radiator 313 and the four-way valve 23, wherein the coolant in the thermal management circuit of the preset component flows into the four-way valve 23 after dissipating heat in the low-temperature radiator 313 through the heat dissipation fan 314, and the second temperature sensor 316 measures the coolant temperature flowing out of the low-temperature radiator 313. The thermal management controller is connected to the first temperature sensor 315 and the second temperature sensor 316 respectively. After receiving the coolant temperature flowing out of the low-temperature radiator 313 and the coolant temperature flowing out of the controller 26, the thermal management controller determines the temperature of the motor 25 and the controller 26, and controls the four-way valve 23 and the cooling fan 314.

[0076] In the present application, by setting a first temperature sensor and a second temperature sensor, the thermal management controller can timely obtain the coolant temperature flowing out of the second heat exchanger and the coolant temperature flowing out of the preset component, so that the thermal management controller can accurately control the temperature of the preset component, effectively improving the accuracy of temperature control of the thermal management system of new energy vehicles and improving the user experience.

[0077] Optionally, the cabin thermal management circuit includes: a cabin cooling circuit, for cooling the cabin; a cabin heating circuit, the fluid inlet of the cabin heating circuit is connected to the fluid inlet of the cabin thermal management circuit, and the fluid outlet of the cabin heating circuit is connected to the fluid outlet of the cabin thermal management circuit, for heating the cabin, and the fluid in the battery thermal management circuit is heated by a fluid component between the battery thermal management circuit and the cabin thermal management circuit; wherein a thermal management controller is connected to the cabin cooling circuit and the cabin heating circuit, and is used to control the operating state of the cabin cooling circuit and / or the cabin heating circuit based on the temperature of the cabin.

[0078] The cabin cooling circuit is used to cool the cabin. The cabin circuit cools the interior of the cabin through air conditioning or fans and other equipment to enhance the user experience.

[0079] The above-mentioned cabin heating circuit is used to heat the cabin. In the present application, the temperature of the coolant in the battery thermal management circuit is transferred to the cabin heating circuit through the battery thermal management circuit and the fluid component, so as to heat the coolant in the cabin heating circuit and heat the interior of the cabin to enhance the user experience.

[0080] In an optional embodiment, the cabin thermal management circuit includes a cabin cooling circuit and a cabin heating circuit, wherein the cabin cooling circuit can cool the coolant in the cabin cooling circuit through a compressor and a condenser, and then blow cold air into the cabin through an evaporator and a blower to cool the cabin; the coolant inlet of the cabin heating circuit is connected to the coolant inlet of the cabin thermal management circuit, and the coolant outlet of the cabin heating circuit is connected to the cooling outlet of the cabin thermal management circuit, and the coolant in the battery thermal management circuit flows into the fluid component, and the fluid component is arranged between the battery thermal management circuit and the cabin thermal management circuit, and the temperature of the coolant in the battery thermal management circuit is transferred to the cabin heating circuit in the cabin thermal management circuit to heat the cabin of the new energy vehicle. Among them, the fluid component can be a water-to-water heat exchanger, a plate heat exchanger, a shell and tube heat exchanger, a spiral plate heat exchanger, or a tube-fin heat exchanger, etc. The thermal management controller is connected to the cabin cooling circuit and the cabin heating circuit, and is used to control the working state of the cabin cooling circuit and / or the cabin heating circuit based on the temperature of the cabin.

[0081] In the present application, the cabin thermal management circuit is divided into a cabin cooling circuit and a cabin heating circuit, so that the cabin is cooled by the air-conditioning system when it is cooled, but the temperature of the coolant in the battery thermal management circuit can be used when it is heated, thereby effectively reducing the number of devices in the thermal management system of new energy vehicles, effectively reducing the complexity of the thermal management system of new energy vehicles, reducing the failure rate of the thermal management system of new energy vehicles, and improving the user experience.

[0082] Optionally, the cabin cooling circuit and the battery thermal management circuit share a compressor and a condenser, and the cabin cooling circuit includes: a third heat exchanger, the fluid outlet of the third heat exchanger is connected to the fluid inlet of the compressor, the fluid inlet of the third heat exchanger is connected to the fluid outlet of the condenser through the first expansion valve, the fluid inlet of the condenser is connected to the fluid outlet of the compressor, and the third heat exchanger is used to cool the cabin with the fluid output by the condenser; wherein, the thermal management controller is connected to the third heat exchanger and the first expansion valve, and is used to control the working state of at least one of the third heat exchanger, the compressor and the condenser based on the temperature of the cabin, and / or control the opening of the first expansion valve.

[0083] The third heat exchanger is a heat exchanger used to cool the interior of the cabin by using the coolant temperature in the cabin cooling circuit, wherein the third heat exchanger may be a device such as an evaporator that transfers the temperature of the liquid to the air to cool the air.

[0084] In an optional embodiment, if Figure 3 As shown, the evaporator 321 is used as the third heat exchanger, the coolant outlet of the compressor 321 is connected to the coolant inlet of the compressor 322, the coolant inlet of the evaporator 321 is connected to the coolant outlet of the condenser 323 through the first expansion valve 324, the coolant inlet of the condenser 323 is connected to the coolant outlet of the compressor 322, the coolant flows into the compressor 322, the compressor 322 compresses the coolant to form high-pressure and high-temperature gas and transmits it to the condenser 323, the condenser 323 condenses the high-pressure and high-temperature gas to obtain high-pressure and low-temperature coolant, and inputs the high-pressure and low-temperature coolant into the first expansion valve 324, the first expansion valve 324 is used to control the flow of the high-pressure and low-temperature coolant, the high-pressure and low-temperature coolant flows into the evaporator 321 after passing through the first expansion valve 324, the blower 325 blows air to the evaporator 321, and the air is cooled by the high-pressure and low-temperature coolant in the evaporator 321, so as to cool the cabin. The thermal management controller is connected to the evaporator 321 , the blower 325 and the first expansion valve 324 , and controls the evaporator 321 , the blower 325 or the first expansion valve 324 based on the cabin temperature to adjust the cabin interior temperature.

[0085] In the present application, by providing the first expansion valve and the third heat exchanger, the internal temperature of the cabin can be accurately controlled, thereby improving the accuracy of the internal temperature control of the cabin of new energy vehicles and enhancing the user experience.

[0086] Optionally, the cabin heating circuit includes: a second pump, a fluid inlet of the second pump is connected to the fluid inlet of the cabin heating circuit, for controlling the flow of the second fluid in the cabin heating circuit; a heating device, the fluid inlet of the heating device is connected to the fluid outlet of the second pump, for heating the second fluid; a fourth heat exchanger, the fluid inlet of the fourth heat exchanger is connected to the fluid outlet of the heating device, and the fluid outlet of the fourth heat exchanger is connected to the fluid outlet of the cabin heating circuit, for heating the cabin and heating the fluid in the battery thermal management circuit; wherein a thermal management controller is connected to the second pump, the heating device and the fourth heat exchanger, for controlling the operating state of at least one of the second pump, the heating device and the fourth heat exchanger based on the temperature of the cabin.

[0087] The second pump is a water pump and is arranged in the cabin heating circuit, for providing kinetic energy for the coolant in the cabin heating circuit, and pumping the coolant in the cabin heating circuit to the heating device to heat the coolant through the heating device.

[0088] The above-mentioned heating device is a device for heating the coolant in the cabin heating circuit, wherein the above-mentioned heating device includes but is not limited to: an electric heater, a positive temperature coefficient heating element or an electric heating wire heater, etc.

[0089] The above-mentioned heater core refers to a device used to transfer the coolant temperature in the cabin heating circuit to the air. The blower blows air to the heater core, and the air is heated by the heater core and sent into the cabin to heat the cabin.

[0090] In an optional embodiment, if Figure 3 As shown, the positive temperature coefficient heating element 327 is used as a heating device, and the warm core 328 is used as a fourth heat exchanger. The cabin heating circuit includes a second pump 326, a positive temperature coefficient heating element 327 and a warm core 328. The second pump 326 pumps the coolant in the cabin heating circuit to the positive temperature coefficient heating element 327. The positive temperature coefficient heating element 327 heats the coolant and outputs the heated coolant to the warm core 328. The blower 325 blows air to the warm core 328. The warm core 328 transfers the temperature of the coolant to the air and inputs the heated air into the cabin through the blower 325 to heat the cabin. After the coolant flows out of the warm core 328, it flows back to the second pump 326 through the water-to-water heat exchanger 21. Among them, the thermal management controller is connected to the second pump 326, the positive temperature coefficient heating element 327 and the warm core 328, and is used to control the second pump 326, the positive temperature coefficient heating element 327 and the warm core 328 based on the cabin temperature, so as to control the working state of the second pump 326, the positive temperature coefficient heating element 327 and the warm core 328, and then adjust the temperature in the cabin.

[0091] In the present application, by providing a second pump, a heating device and a fourth heat exchanger, the cabin heating circuit can not only rely on the battery thermal management circuit to heat the interior of the cabin, but can also heat the interior of the cabin through the second pump, the heating device and the fourth heat exchanger, so that when the battery temperature is low, the interior of the cabin can still be heated, which effectively improves the applicability of the thermal management system of new energy vehicles and enhances the user experience.

[0092] Optionally, the cabin cooling circuit and the battery thermal management circuit share a compressor and a condenser, and the battery thermal management circuit includes: a second storage device for storing a third fluid; a third pump, the fluid inlet of the third pump is connected to the fluid outlet of the second storage device, the second fluid inlet of the battery thermal management circuit and the second fluid inlet of the battery thermal management circuit, the liquid outlet of the third pump is connected to the liquid outlet of the battery thermal management circuit through the battery, and the third pump is used to control the flow of the third fluid in the battery thermal management circuit; a fifth heat exchanger, including: a third branch and a fourth branch, the first end of the third branch is connected to the fluid of the battery thermal management circuit The inlet of the third branch is connected, the second end of the third branch is connected to the fluid inlet of the second storage device, the first end of the fourth branch is connected to the fluid inlet of the compressor, the second end of the fourth branch is connected to the fluid outlet of the condenser through the second expansion valve, the fluid inlet of the condenser is connected to the fluid outlet of the compressor, and the fifth heat exchanger is used to exchange heat between the third branch and the fourth branch; wherein the thermal management controller is connected to the third pump, the fifth heat exchanger and the second expansion valve, and is used to control the working state of the compressor, the condenser, the third pump and / or the fifth heat exchanger based on the temperature of the battery, and / or control the opening of the second expansion valve.

[0093] The second storage device is used to store the coolant in the battery thermal management circuit, wherein the second storage device includes but is not limited to: an expansion tank, an expansion kettle or an expansion water tank and other devices for storing coolant.

[0094] The third pump is disposed between the second storage device and the battery, and is used to pump the coolant in the battery thermal management circuit into the battery to heat or cool the battery.

[0095] The fifth heat exchanger is a device for exchanging heat between the temperature of the coolant condensed by the condenser and the temperature of the coolant in the battery thermal management circuit, wherein the fifth heat exchanger includes but is not limited to: a plate heat exchanger, a shell and tube heat exchanger, a spiral plate heat exchanger or a tube-fin heat exchanger, etc.

[0096] In an optional embodiment, if Figure 3As shown, the battery expansion kettle 331 is used as the second storage device, and the plate heat exchanger 333 is used as the fifth heat exchanger. The battery expansion kettle 331 is arranged between the second end of the third branch of the plate heat exchanger 333 and the battery thermal management circuit, and is used to store the coolant in the battery thermal management circuit; the coolant inlet of the third pump 332 is connected to the coolant outlet of the battery expansion kettle 331, the second coolant inlet of the battery thermal management circuit and the second coolant inlet of the battery thermal management circuit, and the coolant outlet of the third pump 332 is connected to the liquid outlet of the battery thermal management circuit through the battery 24. The third pump 332 is used to control the coolant in the battery thermal management circuit to flow in the battery thermal management circuit; the first end of the third branch of the plate heat exchanger 333 is connected to the coolant inlet of the battery thermal management circuit The second end of the third branch of the plate heat exchanger 333 is connected to the coolant inlet of the battery expansion kettle 331, the first end of the fourth branch of the plate heat exchanger 333 is connected to the coolant inlet of the compressor 322, the second end of the fourth branch of the plate heat exchanger 333 is connected to the coolant outlet of the condenser 323 through the second expansion valve 334, the coolant inlet of the condenser 323 is connected to the coolant outlet of the compressor 322, wherein the second expansion valve 334 is used to control the flow of coolant flowing through the plate heat exchanger 333, the coolant in the battery thermal management loop exchanges heat with the coolant output by the condenser through the plate heat exchanger 333, and is then transmitted to the third pump 332, the third pump 332 inputs the coolant in the battery thermal management loop into the battery 24 to cool the battery 24. Among them, the thermal management controller is connected to the third pump 332, the plate heat exchanger 333 and the second expansion valve 334, and controls the working status of the compressor 322, the condenser 323, the third pump 332 and the plate heat exchanger 333 based on the temperature of the battery 24, and controls the opening of the second expansion valve 334 to control the temperature of the battery 24.

[0097] In the present application, by providing a second storage device, a third pump, a fifth heat exchanger and a second expansion valve, the temperature of the battery can be accurately controlled by a thermal management controller, thereby effectively improving the accuracy of thermal management of new energy vehicles and enhancing the user experience.

[0098] Optionally, the battery thermal management circuit includes: a three-way valve, a first end of the three-way valve is connected to the battery, a second end of the three-way valve is connected to the third end of the four-way valve, and the third end of the three-way valve is connected to the second end of the second branch in the first heat exchanger; wherein, a thermal management controller is connected to the three-way valve, and is used to control the opening of the three-way valve based on the temperature of the battery.

[0099] In an optional embodiment, if Figure 3As shown, a three-way valve 23 is also provided in the battery thermal management circuit, wherein a first end 221 of the three-way valve is connected to the battery 24, a second end 222 of the three-way valve is connected to a third end of the four-way valve, and a third end 223 of the three-way valve is connected to a second end of the second branch of the water-to-water heat exchanger 21; a thermal management controller is connected to the three-way valve, and is used to control the opening degree of the three-way valve 22 and the connection direction of the three-way valve 22 based on the temperature of the battery 24.

[0100] In the present application, a three-way valve is set to switch the flow direction of the coolant in the battery thermal management circuit through the three-way valve, so that the battery can be cooled through the fifth heat exchanger, or the battery can be heated through the first heat exchanger, thereby effectively reducing the number of devices in the thermal management system of new energy vehicles, effectively reducing the complexity of the thermal management system of new energy vehicles, reducing the failure rate of the thermal management system of new energy vehicles, and improving the user experience.

[0101] Optionally, the system also includes: a third temperature sensor, arranged at the fluid outlet of the third pump; a fourth temperature sensor, arranged at the liquid outlet of the battery thermal management loop; wherein the thermal management controller is connected to the third temperature sensor and the fourth temperature sensor, and is used to determine the temperature of the battery based on the temperatures collected by the third temperature sensor and the fourth temperature sensor.

[0102] In an optional embodiment, if Figure 3 As shown, the thermal management system of the new energy vehicle is also provided with a third temperature sensor 335 and a fourth temperature sensor 336. The third temperature sensor 335 is arranged at the coolant outlet of the third pump 332, and is used to measure the coolant temperature output by the third pump 332. The fourth temperature sensor 336 is arranged at the coolant outlet of the battery thermal management circuit, and is used to measure the coolant temperature of the coolant outlet of the battery thermal management circuit. The thermal management controller is respectively connected to the third temperature sensor 335 and the fourth temperature sensor 336, and the thermal management controller collects data from the third temperature sensor 335 and the fourth temperature sensor 336, and calculates and determines the temperature of the battery.

[0103] In the present application, by setting a third temperature sensor and a fourth temperature sensor, the temperature of the coolant flowing into the battery and the temperature of the coolant flowing out of the battery can be obtained to calculate the temperature of the battery, which effectively improves the accuracy of battery temperature control, improves the accuracy of thermal management of new energy vehicles, and improves the user experience.

[0104] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0105] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0106] According to an embodiment of the present invention, an embodiment of a thermal management method for a new energy vehicle is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here. The method is applied to the thermal management system of the new energy vehicle provided in the above-mentioned embodiment.

[0107] Figure 4 is a flow chart of an optional thermal management method for a new energy vehicle according to an embodiment of the present invention, such as Figure 4 As shown, the method comprises the following steps:

[0108] Step S402 , collecting temperatures of vehicle components corresponding to a plurality of thermal management loops.

[0109] In an optional embodiment, the coolant temperature at both ends of the vehicle component is obtained by a temperature sensor, and the cooling temperature values ​​at both ends of the vehicle component are input into a thermal management controller, and the thermal management controller calculates the temperature of the corresponding vehicle component based on the cooling temperature values ​​at both ends of the vehicle component. For example, Figure 3As shown, the first temperature sensor 315 and the second temperature sensor 316 are respectively set at the two ends of the motor 25 and the controller 26 to obtain the coolant temperature at both ends of the motor 25 and the controller 26, and transmit the coolant temperature at both ends of the motor 25 and the controller 26 to the thermal management controller, and calculate the temperature of the motor 25 and the controller 26; the third temperature sensor 335 and the fourth temperature sensor 336 are respectively set at the two ends of the battery 24 to obtain the coolant temperature at both ends of the battery 24, and transmit the coolant temperature at both ends of the battery 24 to the thermal management controller, and calculate the temperature of the battery 24.

[0110] In this application, the temperature of the coolant is obtained by a temperature sensor, which can not only obtain the temperature of the coolant, but also calculate the temperature of the corresponding vehicle component through the coolant temperature, effectively reducing the number of devices in the thermal management system of new energy vehicles, effectively reducing the complexity of the thermal management system of new energy vehicles, reducing the failure rate of the thermal management system of new energy vehicles, and improving the user experience.

[0111] Step S404 , controlling the operating states of multiple thermal management circuits and / or fluid components based on the temperature of the vehicle components.

[0112] In an optional embodiment, the operating states of the cabin thermal management circuit, the battery thermal management circuit, and the preset component thermal management circuit are controlled based on the temperature of the vehicle component. In response to the high temperature of the vehicle component, the water pump or expansion valve is controlled to increase the coolant flow rate, and in response to the low temperature of the vehicle component, the water pump or expansion valve is controlled to reduce the coolant flow rate. The operating state of the thermal management circuit can also be controlled by the thermal management controller, and the connection state of the four-way valve and the three-way valve is adjusted to switch the path of the coolant.

[0113] For example, Figure 3 As shown, the opening of the first expansion valve 324 is controlled by the thermal management controller to control the coolant flowing into the battery 24, and the opening of the second expansion valve 334 is controlled by the thermal management controller to control the coolant flow rate of the coolant flowing into the plate heat exchanger 333. In response to the need to heat the cabin through the temperature of the battery 24, the first end 221 of the three-way valve is connected to the third end 223 of the three-way valve, so that the coolant passes through the water-water heat exchanger 21 to heat the coolant in the cabin thermal management circuit to heat the cabin. In response to the battery 24 needing to be cooled by the condenser 323, the second end 222 of the three-way valve is connected to the first end 221 of the three-way valve, and the third end of the four-way valve is connected to the fourth end of the four-way valve, so that the heat exchange between the coolant in the battery thermal management system and the coolant output by the condenser 323 can be completed through the plate heat exchanger 333 to cool the battery 24.

[0114] In the present application, multiple thermal management circuits and / or fluid components are controlled by a thermal management controller to switch the working states of multiple thermal management circuits and / or the working states of fluid components, thereby accurately completing the temperature control of vehicle components while reducing the internal components of new energy vehicles, effectively reducing the number of devices in the thermal management system of new energy vehicles, effectively reducing the complexity of the thermal management system of new energy vehicles, reducing the failure rate of the thermal management system of new energy vehicles, and improving the user experience.

[0115] Optionally, in the case where multiple thermal management circuits include a preset component thermal management circuit and a battery thermal management circuit, the operating states of multiple thermal management circuits and / or fluid components are controlled based on the temperature of the vehicle components, including: when the temperature of the preset component is greater than or equal to the preset component temperature, and the temperature of the battery is within the preset battery temperature range, the first end of the four-way valve is controlled to be connected to the second end, and the preset component thermal management circuit is controlled to operate; when the temperature of the preset component is less than the preset component temperature, and the temperature of the battery is greater than or equal to the maximum value of the preset battery temperature range, the third end of the four-way valve is controlled to be connected to the fourth end, and the battery thermal management circuit, the compressor and the condenser are controlled to operate; when the temperature of the preset component is greater than or equal to the preset component temperature, and the temperature of the battery is greater than or equal to the maximum value of the preset battery temperature range, the first end of the four-way valve is controlled to be connected to the third end, and the second end of the four-way valve is controlled to be connected to the fourth end, the preset component thermal management circuit and the battery thermal management circuit are controlled to operate, and the compressor and the condenser are controlled to stop operating.

[0116] The above-mentioned preset component temperature can be set according to preset component parameters, the above-mentioned preset component temperature can also be set manually according to experience and needs, and the above-mentioned preset component temperature can also be set according to actual application scenarios.

[0117] The above-mentioned preset battery temperature range can be set according to battery parameters, the above-mentioned preset battery temperature range can also be set manually according to experience and needs, and the above-mentioned preset battery temperature range can also be set according to actual application scenarios.

[0118] In an optional embodiment, when the multiple thermal management circuits include a preset component thermal management circuit and a battery thermal management circuit, in response to the temperature of the preset component being greater than or equal to the preset component temperature, and the temperature of the battery being within the preset battery temperature range, the first end of the four-way valve is controlled to be connected to the second end, and the preset component thermal management circuit is controlled to work to cool the preset component. In response to the temperature of the preset component being less than the preset component temperature, and the temperature of the battery being greater than or equal to the maximum value of the preset battery temperature range, the third end of the four-way valve is controlled to be connected to the fourth end, and the battery thermal management circuit, the compressor and the condenser are controlled to work to cool the battery; in response to the temperature of the preset component being greater than or equal to the preset component temperature, and the temperature of the battery being greater than or equal to the maximum value of the preset battery temperature range, the first end of the four-way valve is controlled to be connected to the third end, and the second end of the four-way valve is controlled to be connected to the fourth end, and the preset component thermal management circuit and the battery thermal management circuit are controlled to work, and the compressor and the condenser are controlled to stop working.

[0119] For example, Figure 5 is a schematic diagram of a working mode of multiple thermal management circuits in which a compressor and a condenser are stopped according to an optional embodiment of the present invention, such as Figure 5As shown, the three-way valve 22 only connects the first end 221 of the three-way valve and the second end 222 of the three-way valve, and the third end 223 of the three-way valve remains disconnected. The temperature of the coolant flowing out of the controller 26 is measured by the first temperature sensor 315, and the temperature of the coolant flowing into the motor 25 is measured by the second temperature sensor 316. The temperature of the coolant flowing out of the controller 26 and the temperature of the coolant flowing into the motor 25 are input into the thermal management controller, and the temperature of the motor 25 and the temperature of the controller 26 are calculated. The temperature of the coolant at both ends of the battery 24 is measured by the third temperature sensor 335 and the fourth temperature sensor 336, and the temperature of the coolant at both ends of the battery 24 is input into the thermal management controller, and the temperature of the battery 24 is calculated. If the temperature of the motor 25 is greater than or equal to the preset component temperature, or the temperature of the controller 26 is greater than or equal to the preset component temperature, the first end 231 of the four-way valve and the second end 232 of the four-way valve are controlled by the thermal management controller to be connected, and the first pump 312, the low-temperature radiator 313 and the heat dissipation fan 314 are controlled to work, so as to cool the motor 25 and / or the controller 26; if the temperature of the motor 25 is greater than or equal to the preset component temperature, or the temperature of the controller 26 is greater than or equal to the preset component temperature, and the temperature of the battery is greater than or equal to the maximum value of the preset battery temperature range, the four-way valve 23 is controlled by the thermal management controller to control the first end 231 of the four-way valve to be connected with the third end 233 of the four-way valve, the second end 232 of the four-way valve to be connected with the fourth end 234 of the four-way valve, and the first pump 312, the low-temperature radiator 313 and the heat dissipation fan 314 are controlled to work, the compressor 322 and the condenser 323 stop working, and the battery 24, the motor 25 and the controller 26 are cooled by the low-temperature radiator 313 and the heat dissipation fan 314. If the cooling efficiency of the battery 24 , the motor 25 and the controller 26 is low only by the low-temperature radiator 313 and the cooling fan 314 , the compressor 322 and the condenser 323 may be turned on to cool the battery 24 , the motor 25 and the controller 26 .

[0120] Figure 6 is a schematic diagram of a working mode of multiple thermal management circuits in which a compressor and a condenser start working according to an optional embodiment of the present invention, such as Figure 6As shown, the three-way valve 22 only connects the first end 221 of the three-way valve with the second end 222 of the three-way valve, and the third end 223 of the three-way valve remains disconnected. The temperature of the coolant flowing out of the controller 26 is measured by the first temperature sensor 315, and the temperature of the coolant flowing into the motor 25 is measured by the second temperature sensor 316. The temperature of the coolant flowing out of the controller 26 and the temperature of the coolant flowing into the motor 25 are input into the thermal management controller, and the temperature of the motor 25 and the temperature of the controller 26 are calculated. The temperature of the coolant at both ends of the battery 24 is measured by the third temperature sensor 335 and the fourth temperature sensor 336, and the temperature of the coolant at both ends of the battery 24 is input into the thermal management controller, and the temperature of the battery 24 is calculated. If the temperature of the motor 25 or the controller 26 is lower than the preset component temperature, and the temperature of the battery is greater than or equal to the maximum value of the preset battery temperature range, the third end 233 of the four-way valve is controlled by the thermal management controller to be connected with the fourth end 234 of the four-way valve, and the battery thermal management circuit, the compressor 322 and the condenser 323 are controlled to work, and the plate heat exchanger 333 is used to cool the battery 24.

[0121] In the present application, when multiple thermal management circuits include a preset component thermal management circuit and a battery thermal management circuit, the four-way valve and the thermal management circuit are controlled based on the temperature of the vehicle components to quickly control the temperature of the vehicle components, thereby effectively improving the efficiency of thermal management of new energy vehicles and enhancing the user experience.

[0122] Optionally, in the case where multiple thermal management circuits include a battery thermal management circuit and a cabin thermal management circuit, the operating states of the multiple thermal management circuits and / or fluid components are controlled based on the temperature of the vehicle components, including: when the temperature of the battery is lower than the minimum value of a preset battery temperature range, controlling the battery thermal management circuit, the cabin thermal management circuit and the first heat exchanger to operate; when the temperature of the cabin is lower than the minimum value of the preset cabin temperature range, controlling the cabin thermal management circuit to operate; when the temperature of the cabin is higher than the maximum value of the preset cabin temperature range, controlling the cabin thermal management circuit, the compressor and the condenser to operate.

[0123] The above-mentioned preset cabin temperature range can be set according to the ambient temperature environment, the above-mentioned preset cabin temperature range can also be set manually according to experience and needs, and the above-mentioned preset cabin temperature range can also be set according to actual application scenarios.

[0124] In an optional embodiment, when multiple thermal management circuits include a battery thermal management circuit and a cabin thermal management circuit, in response to the battery temperature being less than the minimum value of a preset battery temperature range, the battery thermal management circuit, the cabin thermal management circuit and the first heat exchanger are controlled to operate, and the battery is heated by the first heat exchanger; in response to the cabin temperature being less than the minimum value of the preset cabin temperature range, the cabin thermal management circuit is controlled to operate to heat the cabin; in response to the cabin temperature being greater than the maximum value of the preset cabin temperature range, the cabin thermal management circuit, the compressor and the condenser are controlled to operate to cool the cabin.

[0125] For example, Figure 7 FIG. 1 is another optional schematic diagram of the working mode of multiple thermal management circuits in which the compressor and the condenser are stopped according to an embodiment of the present invention. Figure 6 As shown, when the multiple thermal management circuits include a battery thermal management circuit and a cabin thermal management circuit, the coolant temperature at both ends of the battery 24 is measured by the third temperature sensor 335 and the fourth temperature sensor 336, and the coolant temperature at both ends of the battery 24 is input into the thermal management controller to calculate the temperature of the battery 24. When the temperature of the battery is lower than the minimum value of the preset battery temperature range, the third end 223 of the three-way valve 22 is connected to the first end 221 of the three-way valve, and the second end 222 of the three-way valve remains disconnected. The second pump 326 pumps the coolant to the positive temperature coefficient heating element 327. After being heated, the coolant passes through the heater core 328 and is input into the water-to-water heat exchanger 21. The heated coolant exchanges heat with the coolant in the battery thermal management circuit in the water-to-water heat exchanger 21, so as to be input into the battery 24 through the third pump 332 to heat the battery 24. When the temperature of the cabin is lower than the minimum value of the preset cabin temperature range, the second pump 326 pumps the coolant to the positive temperature coefficient heating element 327. After being heated, the coolant enters the heater core 328. The blower 325 works to blow air to the heater core 328, and controls the coolant to enter the cabin after being heated by the heater core 328 to heat the cabin.

[0126] Figure 8 FIG. 1 is another schematic diagram of the working mode of multiple heat management loops in which the compressor and the condenser start working according to another optional embodiment of the present invention, such as Figure 8As shown, when the multiple thermal management loops include a battery thermal management loop and a cabin thermal management loop, the coolant temperature at both ends of the battery 24 is measured by the third temperature sensor 335 and the fourth temperature sensor 336, and the coolant temperature at both ends of the battery 24 is input into the thermal management controller to calculate the temperature of the battery 24. When the cabin temperature is greater than the maximum value of the preset cabin temperature range, the second pump 326, the positive temperature coefficient heating element 327 and the warm core 328 are controlled to stop working, the compressor 322 and the condenser 323 are operated, and the condensed coolant is input into the evaporator 321, and the blower 325 blows air to the evaporator 321, so that the air and the condensed coolant exchange heat, and the air with a lower temperature is blown into the cabin to cool the cabin, wherein the first expansion valve 324 is used to control the flow of the coolant.

[0127] An embodiment of the present application further provides an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods in various embodiments of the present invention when running.

[0128] An embodiment of the present application further provides a computer-readable storage medium, which includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0129] An embodiment of the present application further provides a computer program product, including a computer program, which implements the methods in various embodiments of the present invention when executed by a processor.

[0130] An embodiment of the present application further provides a computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium is used to store a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0131] The embodiments of the present application further provide a computer program, which implements the methods in the above-mentioned embodiments of the present invention when executed by a processor.

[0132] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0133] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0134] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0135] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0136] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0137] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A thermal management system for a new energy vehicle, characterized in that: include: A plurality of thermal management circuits and a thermal management controller, wherein the plurality of thermal management circuits transfer heat through a fluid component, and the plurality of thermal management circuits include at least two of the following: a preset component thermal management circuit, a battery thermal management circuit, and a cabin thermal management circuit, The thermal management controller is connected to the plurality of thermal management loops and the fluid component, wherein: The preset component thermal management circuit is used to cool the preset component of the new energy vehicle, wherein the preset component includes at least one of the following: a motor and a controller; The battery thermal management circuit is used to heat or cool the battery of the new energy vehicle; The cabin thermal management circuit is used to cool down or heat up the cabin of the new energy vehicle; The thermal management controller is used to control the working states of the multiple thermal management circuits and / or the fluid components based on the temperatures of the vehicle components corresponding to the multiple thermal management circuits.

2. The thermal management system of a new energy vehicle according to claim 1, characterized in that: The fluid component between the preset component thermal management loop and the battery thermal management loop comprises: a four-way valve, wherein the fluid inlet of the preset component thermal management loop is connected to the first end of the four-way valve, the fluid outlet of the preset component thermal management loop is connected to the second end of the four-way valve, the fluid outlet of the battery thermal management loop is connected to the third end of the four-way valve, and the first fluid inlet of the battery thermal management loop is connected to the fourth end of the four-way valve; Wherein, the thermal management controller is connected to the four-way valve and is used to control the connection state of the four-way valve based on the temperature of the preset component and the battery.

3. The thermal management system of a new energy vehicle according to claim 1, characterized in that: The fluid component between the battery thermal management circuit and the cabin thermal management circuit comprises: a first heat exchanger, wherein a fluid outlet of the battery thermal management circuit is connected to a first end of a first branch in the first heat exchanger, a fluid inlet of the battery thermal management circuit is connected to a second end of the first branch, a fluid outlet of the cabin thermal management circuit is connected to a first end of a second branch in the first heat exchanger, and a fluid inlet of the cabin thermal management circuit is connected to a second end of the second branch; The thermal management controller is connected to the first heat exchanger and is used to control a connectivity state of the first heat exchanger based on the temperature of the battery and the cabin.

4. The thermal management system of a new energy vehicle according to claim 1, characterized in that: The fluid component between the cabin thermal management circuit and the preset component thermal management circuit comprises: a four-way valve and a first heat exchanger, wherein the fluid inlet of the preset component thermal management circuit is connected to the first end of the four-way valve, the fluid outlet of the preset component thermal management circuit is connected to the second end of the four-way valve, the third end of the four-way valve is connected to the first end of the first branch in the first heat exchanger, the fourth end of the four-way valve is connected to the second end of the first branch, the fluid outlet of the cabin thermal management circuit is connected to the first end of the second branch in the first heat exchanger, and the fluid inlet of the cabin thermal management circuit is connected to the second end of the second branch; The thermal management controller is connected to the four-way valve and the first heat exchanger, and is used to control the connectivity state of the four-way valve and / or the first heat exchanger based on the temperature of the preset component and the cabin.

5. The thermal management system for new energy vehicles according to any one of claims 1 to 4, characterized in that: The preset component thermal management loop includes: a first storage device, wherein a fluid inlet of the first storage device is connected to a fluid inlet of a thermal management circuit of the preset component through the preset component, and the first storage device is used to store a first fluid; a first pump, wherein a fluid inlet of the first pump is connected to a fluid outlet of the first storage device, and the first pump is used to control the first fluid to flow in the thermal management circuit of the preset component; a second heat exchanger, wherein a fluid inlet of the second heat exchanger is connected to a fluid outlet of the first pump, a fluid outlet of the second heat exchanger is connected to a fluid outlet of a thermal management circuit of the preset component, and the second heat exchanger is used to dissipate heat for the first fluid; Wherein, the thermal management controller is connected to the first pump and the second heat exchanger, and is used to control the working parameters of the first pump and the second heat exchanger based on the temperature of the preset component.

6. The thermal management system for new energy vehicles according to claim 5, characterized in that: Also includes: a first temperature sensor disposed at a fluid inlet of the first storage device; a second temperature sensor, disposed at a fluid outlet of the second heat exchanger; The thermal management controller is connected to the first temperature sensor and the second temperature sensor, and is used to determine the temperature of the preset component based on the temperatures collected by the first temperature sensor and the second temperature sensor.

7. The thermal management system for new energy vehicles according to any one of claims 1 to 4, characterized in that: The cabin thermal management circuit comprises: A cabin cooling circuit, used to cool the cabin; a cabin heating circuit, wherein a fluid inlet of the cabin heating circuit is connected to a fluid inlet of the cabin thermal management circuit, and a fluid outlet of the cabin heating circuit is connected to a fluid outlet of the cabin thermal management circuit, for heating the cabin, and heating the fluid in the battery thermal management circuit through a fluid component between the battery thermal management circuit and the cabin thermal management circuit; The thermal management controller is connected to the cabin cooling circuit and the cabin heating circuit, and is used to control the working state of the cabin cooling circuit and / or the cabin heating circuit based on the temperature of the cabin.

8. The thermal management system for new energy vehicles according to claim 7, characterized in that: The cabin cooling circuit and the battery thermal management circuit share a compressor and a condenser, and the cabin cooling circuit includes: a third heat exchanger, wherein a fluid outlet of the third heat exchanger is connected to a fluid inlet of the compressor, the fluid inlet of the third heat exchanger is connected to a fluid outlet of the condenser through a first expansion valve, the fluid inlet of the condenser is connected to a fluid outlet of the compressor, and the third heat exchanger is used to cool the cabin by means of the fluid output by the condenser; Wherein, the thermal management controller is connected to the third heat exchanger and the first expansion valve, and is used to control the working state of at least one of the third heat exchanger, the compressor and the condenser based on the temperature of the cabin, and / or control the opening of the first expansion valve.

9. The thermal management system for new energy vehicles according to claim 7, characterized in that: The cabin heating circuit comprises: a second pump, wherein a fluid inlet of the second pump is connected to a fluid inlet of the cabin heating circuit and is used to control the flow of a second fluid in the cabin heating circuit; a heating device, wherein the fluid inlet of the heating device is connected to the fluid outlet of the second pump, and is used for heating the second fluid; a fourth heat exchanger, wherein a fluid inlet of the fourth heat exchanger is connected to a fluid outlet of the heating device, and a fluid outlet of the fourth heat exchanger is connected to a fluid outlet of the cabin heating circuit, for heating the cabin and heating the fluid in the battery thermal management circuit; Wherein, the thermal management controller is connected to the second pump, the heating device and the fourth heat exchanger, and is used to control the working state of at least one of the second pump, the heating device and the fourth heat exchanger based on the temperature of the cabin.

10. The thermal management system for new energy vehicles according to any one of claims 1 to 4, characterized in that: The cabin cooling circuit and the battery thermal management circuit share a compressor and a condenser, and the battery thermal management circuit includes: a second storage device for storing a third fluid; a third pump, wherein a fluid inlet of the third pump is connected to a fluid outlet of the second storage device, a second fluid inlet of the battery thermal management loop, and a second fluid inlet of the battery thermal management loop, and a liquid outlet of the third pump is connected to a liquid outlet of the battery thermal management loop through the battery, and the third pump is used to control the flow of the third fluid in the battery thermal management loop; a fifth heat exchanger, comprising: a third branch and a fourth branch, wherein a first end of the third branch is connected to a fluid inlet of the battery thermal management circuit, a second end of the third branch is connected to a fluid inlet of the second storage device, a first end of the fourth branch is connected to a fluid inlet of the compressor, a second end of the fourth branch is connected to a fluid outlet of the condenser via a second expansion valve, and the fluid inlet of the condenser is connected to a fluid outlet of the compressor, and the fifth heat exchanger is used to perform heat exchange between the third branch and the fourth branch; Wherein, the thermal management controller is connected to the third pump, the fifth heat exchanger and the second expansion valve, and is used to control the working state of the compressor, the condenser, the third pump and / or the fifth heat exchanger based on the temperature of the battery, and / or control the opening of the second expansion valve.

11. The thermal management system for new energy vehicles according to claim 10, characterized in that: The battery thermal management circuit comprises: a three-way valve, wherein a first end of the three-way valve is connected to the battery, a second end of the three-way valve is connected to a third end of the four-way valve, and a third end of the three-way valve is connected to a second end of the second branch in the first heat exchanger; Wherein, the thermal management controller is connected to the three-way valve and is used to control the opening of the three-way valve based on the temperature of the battery.

12. The thermal management system of a new energy vehicle according to claim 10, characterized in that: Also includes: a third temperature sensor, disposed at the fluid outlet of the third pump; a fourth temperature sensor, disposed at a liquid outlet of the battery thermal management circuit; The thermal management controller is connected to the third temperature sensor and the fourth temperature sensor, and is used to determine the temperature of the battery based on the temperatures collected by the third temperature sensor and the fourth temperature sensor.

13. A thermal management method for a new energy vehicle, characterized in that: A thermal management system for a new energy vehicle according to any one of claims 1 to 12, the method comprising: collecting temperatures of vehicle components corresponding to the plurality of thermal management loops; Based on the temperature of the vehicle component, operating states of the plurality of thermal management circuits and / or the fluid component are controlled.

14. The thermal management method for new energy vehicles according to claim 13, characterized in that: In the case where the plurality of thermal management loops include the preset component thermal management loop and the battery thermal management loop, controlling the working state of the plurality of thermal management loops and / or the fluid component based on the temperature of the vehicle component comprises: When the temperature of the preset component is greater than or equal to the preset component temperature and the temperature of the battery is within the preset battery temperature range, the first end and the second end of the four-way valve are controlled to be connected, and the thermal management circuit of the preset component is controlled to operate; When the temperature of the preset component is lower than the preset component temperature and the temperature of the battery is greater than or equal to the maximum value of the preset battery temperature range, the third end and the fourth end of the four-way valve are controlled to be connected, and the battery thermal management circuit, the compressor and the condenser are controlled to operate; When the temperature of the preset component is greater than or equal to the preset component temperature, and the temperature of the battery is greater than or equal to the maximum value of the preset battery temperature range, the first end of the four-way valve is controlled to be connected to the third end, and the second end of the four-way valve is controlled to be connected to the fourth end, the preset component thermal management circuit and the battery thermal management circuit are controlled to operate, and the compressor and the condenser are controlled to stop working.

15. The thermal management method for new energy vehicles according to claim 13, characterized in that: In a case where the plurality of thermal management circuits include the battery thermal management circuit and the cabin thermal management circuit, controlling the working state of the plurality of thermal management circuits and / or the fluid component based on the temperature of the vehicle component comprises: When the temperature of the battery is less than a minimum value of a preset battery temperature range, controlling the battery thermal management circuit, the cabin thermal management circuit and the first heat exchanger to operate; When the temperature of the cabin is lower than a minimum value of a preset cabin temperature range, controlling the cabin thermal management circuit to operate; When the temperature of the cabin is greater than a maximum value of a preset cabin temperature range, the cabin thermal management circuit, the compressor and the condenser are controlled to operate.

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