Battery thermal management system and vehicle

Abstract

The utility model discloses a battery thermal management system and a vehicle, the battery thermal management system comprises a battery cooling loop, a heating loop and a first control valve; the battery cooling loop is connected with the heating loop through the first control valve; when the first control valve is in a first working state, the battery cooling loop is used for cooling the battery; and when the first control valve is in a second working state, the battery cooling loop and the heating loop form a battery heating loop, and the battery heating loop is used for heating the battery. According to the technical scheme, the battery heat management system can cool the battery through the battery cooling loop and can also form the battery heating loop to heat the battery through the battery cooling loop and the heating loop by utilizing the first control valve, so that the battery is ensured to work at a proper working temperature, and relatively high conductivity is kept.

Description

Technical Field

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

[0002] A solid-state battery is a battery that uses solid electrodes and a solid electrolyte. There are significant differences between the solid-state battery and the electrolyte of a lithium-ion battery. Among them, polymer solid electrolytes are widely used in the field of solid-state batteries, and polymer electrolytes have good high-temperature performance. Compared with the optimal operating temperature range of 20°C to 30°C for lithium-ion batteries, polymer electrolytes need to operate at a high temperature of 60°C or above. Therefore, the operating temperature range of such solid-state batteries is usually between 60°C and 100°C. Therefore, how to ensure that the above solid-state battery operates at an appropriate operating temperature to maintain a high conductivity has become an urgent technical problem to be solved currently. Summary of the Utility Model

[0003] Embodiments of the utility model provide a battery thermal management system and a vehicle to solve the problem that existing solid-state batteries cannot ensure high conductivity.

[0004] A battery thermal management system includes a battery cooling circuit, a heating circuit, and a first control valve;

[0005] The battery cooling circuit is connected to the heating circuit through the first control valve;

[0006] When the first control valve is in the first working state, the battery cooling circuit is used to cool the battery;

[0007] When the first control valve is in the second working state, the battery cooling circuit and the heating circuit form a battery heating circuit, and the battery heating circuit is used to heat the battery.

[0008] Optionally, the battery cooling circuit includes a battery, a refrigeration circuit, and a first water pump;

[0009] The battery, the refrigeration circuit, and the first water pump are connected in series between the first end and the second end of the first control valve;

[0010] The third end of the first control valve is connected to the heating circuit.

[0011] Optionally, the refrigeration circuit includes a condenser, a compressor, and a battery cooler connected in series;

[0012] The battery, the battery cooler, and the first water pump are connected in series between the first end and the second end of the first control valve.

[0013] Optionally, the refrigeration circuit further includes an evaporator;

[0014] The evaporator is connected in parallel with the battery cooler, and the evaporator is used to form an air-conditioning refrigeration circuit with the condenser and the compressor.

[0015] Optionally, the heating circuit includes a first heating circuit;

[0016] The first heating circuit is serially arranged between the second end and the third end of the first control valve;

[0017] When the first control valve is in the second working state, the first heating circuit is used to form the battery heating circuit with the battery cooling circuit.

[0018] Optionally, the first heating circuit includes a heating device and a heating loop;

[0019] The first end of the heating device is used to connect to the second end of the first control valve, and the second end of the heating device is connected to the third end of the first control valve;

[0020] The heating loop is connected in parallel with the heating device.

[0021] Optionally, when the first control valve is in the first working state, the first heating circuit is isolated from the battery cooling circuit;

[0022] When the first control valve is in the second working state, the heating device forms a battery heating circuit with the battery cooling circuit, and / or the heating device forms an air-conditioning heating circuit with the heating loop;

[0023] Or, when the first control valve is in the second working state, the battery cooling circuit forms an air-conditioning heating circuit with the heating loop.

[0024] Optionally, the heating circuit further includes an engine cooling circuit and a second control valve;

[0025] The first heating circuit and the engine cooling circuit are connected through the second control valve.

[0026] Optionally, when the second control valve is in the first working state, the engine cooling circuit, the heating device and the battery cooling circuit form a battery heating circuit, and / or the engine cooling circuit, the heating device and the heating loop form an air-conditioning heating circuit;

[0027] When the second control valve is in the second working state, the engine cooling circuit and the first heating circuit are isolated from each other.

[0028] A vehicle, including the above-mentioned battery thermal management system.

[0029] The above-mentioned battery thermal management system and vehicle, the battery thermal management system includes a battery cooling circuit, a heating circuit and a first control valve; the battery cooling circuit is connected to the heating circuit through the first control valve; when the first control valve is in the first working state, the battery cooling circuit is used to cool the battery; when the first control valve is in the second working state, the battery cooling circuit and the heating circuit form a battery heating circuit, and the battery heating circuit is used to heat the battery, so that the battery thermal management system can both cool the battery through the battery cooling circuit and form a battery heating circuit through the battery cooling circuit and the heating circuit to heat the battery, thereby ensuring that the battery works at an appropriate working temperature to maintain a high conductivity. Brief Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 is a schematic diagram of a battery thermal management system in an embodiment of the present invention;

[0032] Figure 2 is another schematic diagram of a battery thermal management system in an embodiment of the present invention;

[0033] Figure 3 is another schematic diagram of a battery thermal management system in an embodiment of the present invention;

[0034] Figure 4 is another schematic diagram of a battery thermal management system in an embodiment of the present invention;

[0035] Figure 5 is another schematic diagram of a battery thermal management system in an embodiment of the present invention;

[0036] Figure 6 is another schematic diagram of a battery thermal management system in an embodiment of the present invention.

[0037] In the figure: 1. Battery cooling circuit; 11. Battery; 12. Refrigeration circuit; 121. Condenser; 122. Compressor; 123. Battery cooler; 124. Evaporator; 13. First water pump; 14. Electric drive cooling circuit; 141. First radiator; 142. Second water pump; 143. Electric drive system; 2. Heating circuit; 21. First heating circuit; 211. Heating device; 212. Heating circuit for warming; 2121. Heater core; 2122. Third water pump; 22. Engine cooling circuit; 221. Engine; 222. Fourth water pump; 223. Thermostat; 224. Second radiator; 23. Second control valve; 3. First control valve. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0039] It should be understood that the present invention can be implemented in different forms and should not be construed as limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. In the drawings, for clarity, the dimensions and relative dimensions of layers and regions may be exaggerated. The same reference numerals denote the same elements throughout the drawings.

[0040] It should be understood that when an element or layer is referred to as being "on", "adjacent to", "connected to" or "coupled to" another element or layer, it can be directly on, adjacent to, connected or coupled to the other element or layer, or there may be intervening elements or layers. In contrast, when an element is referred to as being "directly on", "directly adjacent to", "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Thus, without departing from the teachings of the present invention, the first element, component, region, layer or part discussed below may be denoted as the second element, component, region, layer or part.

[0041] Spatial relationship terms such as "under", "below", "beneath", "underneath", "above", "over", etc. may be used herein for convenience of description to describe the relationship of one element or feature shown in the figures with other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relationship terms are also intended to include different orientations of the device during use and operation. For example, if the device in the drawings is flipped, then an element or feature described as "under other elements" or "beneath them" or "underneath them" will be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "beneath" can include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are to be interpreted accordingly.

[0042] The purpose of the terms used herein is only to describe specific embodiments and is not a limitation of the present utility model. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, specify the presence of the features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups. As used herein, the term "and / or" includes any and all combinations of the related listed items.

[0043] To fully understand the present utility model, detailed structures and steps will be set forth in the following description in order to explain the technical solutions proposed by the present utility model. The preferred embodiments of the present utility model are described in detail below. However, in addition to these detailed descriptions, the present utility model may have other embodiments.

[0044] This embodiment provides a battery 11 thermal management system, which is applied to a vehicle and is used to manage the operating temperature of the battery 11 on the vehicle, improve the conductivity of the battery 11, and at the same time improve the energy utilization rate. Exemplarily, the battery 11 may be a solid-state battery or a lithium battery. Preferably, the battery 11 is a solid-state battery.

[0045] This embodiment provides a battery 11 thermal management system, as Figure 1 shown, comprising a battery cooling circuit 1, a heating circuit 2 and a first control valve 3; the battery cooling circuit 1 is connected to the heating circuit 2 through the first control valve 3; when the first control valve 3 is in the first working state, the battery cooling circuit 1 is used to cool the battery 11; when the first control valve 3 is in the second working state, the battery cooling circuit 1 and the heating circuit 2 form a battery heating circuit, and the battery heating circuit is used to heat the battery 11. It should be noted that, Figures 1 to 6Among them, the red and yellow lines represent the heating circuit 2, the green, cyan, and blue lines represent the battery cooling circuit 1, and the gray lines represent non-pass-through lines.

[0046] Optionally, the battery 11 thermal management system further includes a temperature acquisition device and a control device. The temperature acquisition device is used to acquire the temperature of the battery 11. The control device is used to connect the temperature acquisition device and the first control valve 3. It should be noted that the temperature acquisition device can adopt technologies well-known to those skilled in the art and will not be limited here. The control device can adopt an in-vehicle controller in the vehicle.

[0047] Exemplarily, the temperature acquisition device acquires the temperature of the battery 11 and inputs the temperature of the battery 11 into the control device, and the control device controls the working state of the first control valve 3 according to the temperature of the battery 11.

[0048] As an example, when the battery 11 needs to be cooled, the control device controls the first control valve 3 to be in the first working state. For example, the battery cooling circuit 1 and the heating circuit 2 are isolated through the first control valve 3, so as to cool the battery 11 through the battery cooling circuit 1.

[0049] As another example, when the battery 11 needs to be heated, the control device controls the first control valve 3 to be in the second working state, and the battery cooling circuit 1 and the heating circuit 2 are connected and cooperate to form a battery heating circuit, so as to heat the battery 11 through the battery heating circuit.

[0050] In this embodiment, the battery 11 thermal management system includes a battery cooling circuit 1, a heating circuit 2, and a first control valve 3; the battery cooling circuit 1 is connected to the heating circuit 2 through the first control valve 3; when the first control valve 3 is in the first working state, the battery cooling circuit 1 is used to cool the battery 11; when the first control valve 3 is in the second working state, the battery cooling circuit 1 and the heating circuit 2 form a battery heating circuit, and the battery heating circuit is used to heat the battery 11, so that the first control valve 3 enables the battery 11 thermal management system to both cool the battery 11 through the battery cooling circuit 1 and heat the battery 11 through the battery cooling circuit 1 and the heating circuit 2 forming a battery heating circuit, so as to ensure that the battery 11 works at a suitable working temperature to maintain a high conductivity.

[0051] In one embodiment, as Figure 1 shown, the battery cooling circuit 1 includes a battery 11, a refrigeration circuit 12, and a first water pump 13; the battery 11, the refrigeration circuit 12, and the first water pump 13 are connected in series between the first end and the second end of the first control valve 3; the third end of the first control valve 3 is connected to the heating circuit 2.

[0052] As an example, the refrigeration circuit 12 is used to refrigerate the water in the battery cooling circuit 1, so as to cool the battery 11 through heat exchange between the refrigerated water and the battery 11. The first water pump 13 is used to ensure that the water in the battery cooling circuit 1 can circulate normally.

[0053] As an example, the first control valve 3 is a three-way control valve. The battery 11, the refrigeration circuit 12 and the first water pump 13 are arranged in series between the first end of the first control valve 3 and the second end of the first control valve 3; the third end of the first control valve 3 is connected to the heating circuit 2. In this embodiment, when the first control valve 3 is in the first working state, Figure 1 As shown, the first end and the second end of the first control valve 3 are connected, and the first end and the third end of the first control valve 3 are not connected, and the battery cooling circuit 1 is directly used to cool the battery 11. When the first control valve 3 is in the second working state, as shown in FIG. Figure 2 As shown, the first end and the third end of the first control valve 3 are connected, and the first end and the second end of the first control valve 3 are not connected, so that the battery cooling circuit 1 and the heating circuit 2 form a battery heating circuit for heating the battery 11.

[0054] In one embodiment, if Figure 1 As shown, the refrigeration circuit 12 includes a condenser 121 , a compressor 122 and a battery cooler 123 connected in series; the battery 11 , the battery cooler 123 and the first water pump 13 are arranged in series between the first end of the first control valve 3 and the second end of the first control valve 3 .

[0055] In this embodiment, the water in the refrigeration circuit 12 of the battery 11 can be cooled by the condenser 121 , the compressor 122 and the battery cooler 123 .

[0056] Furthermore, the refrigeration circuit 12 also includes a first electronic expansion valve EXV1 connected in series with the battery cooler 123 , which is used to control the cooling capacity of the battery cooler 123 and adjust the cooling temperature of the battery 11 .

[0057] In one embodiment, the refrigeration circuit 12 further includes an evaporator 124 ; the evaporator 124 is connected in parallel with the battery cooler 123 , and the evaporator 124 is used to form the air-conditioning refrigeration circuit 12 with the condenser 121 and the compressor 122 .

[0058] Exemplarily, the evaporator 124 is configured to be disposed in the vehicle cockpit to reduce the temperature of the vehicle cockpit. In this embodiment, by connecting the evaporator 124 in parallel with the battery cooler 123, the evaporator 124 is used to form an air-conditioning refrigeration circuit 12 with the condenser 121 and the compressor 122. When the driver needs air-conditioning refrigeration, the evaporator 124 can form the air-conditioning refrigeration circuit 12 with the condenser 121 and the compressor 122, and reduce the temperature of the vehicle cockpit through the air-conditioning refrigeration circuit 12. It should be noted that the battery cooler 123 and the evaporator 124 in the refrigeration circuit 12 can work simultaneously or one can work while the other does not.

[0059] Further, the refrigeration circuit 12 further includes a second electronic expansion valve EXV2 connected in series with the evaporator 124, which is used to control the refrigerating capacity of the evaporator 124 and adjust the temperature of the vehicle cockpit.

[0060] In one embodiment, the heating circuit 2 includes a first heating circuit 21; the first heating circuit 21 is connected in series between the second end and the third end of the first control valve 3; when the first control valve 3 is in the second working state, the first heating circuit 21 is used to form a battery heating circuit with the battery cooling circuit 1.

[0061] As an example, the first heating circuit 21 includes a heating device 211 for heating the water in the first heating circuit 21. In this embodiment, the first heating circuit 21 is connected in series between the second end and the third end of the first control valve 3 to heat the water in the first heating circuit 21. When the first control valve 3 is in the second working state, the first control valve 3 conducts the battery cooling circuit 1 and the first heating circuit 21 to form a battery heating circuit, thereby realizing heating of the battery 11.

[0062] Exemplarily, the heating device 211 includes a PTC (Positive Temperature Coefficient) heater.

[0063] In one embodiment, as Figure 2 shown, the first heating circuit 21 includes a heating device 211 and a warming circuit 212; the first end of the heating device 211 is used to connect to the second end of the first control valve 3, and the second end of the heating device 211 is connected to the third end of the first control valve 3; the warming circuit 212 is connected in parallel with the heating device 211.

[0064] As an example, the warming circuit 212 is used to increase the temperature of the vehicle cockpit. Exemplarily, the warming circuit 212 is disposed in the vehicle cockpit.

[0065] In this embodiment, the first end of the heating device 211 is used to connect to the second end of the first control valve 3, and the second end of the heating device 211 is connected to the third end of the first control valve 3; the heating circuit 212 is in parallel with the heating device 211. This can not only make the heat generated by the heating device 211 be used for heating the battery 11, but also be used through the heating circuit 212 to raise the temperature of the vehicle cockpit. Moreover, when the battery 11 needs to be cooled and the temperature of the vehicle cockpit needs to be raised, the refrigeration circuit 12 of the battery 11 can be made not to work, and heat exchange is carried out between the heat generated by the battery 11 and the heating circuit 212, that is, the heat generated by the battery 11 is used to raise the temperature of the vehicle cockpit, thereby improving the energy utilization rate of the battery 11 thermal management system.

[0066] Further, the heating circuit 212 includes a heater core 2121 and a third water pump 2122 connected in series.

[0067] In one embodiment, as Figure 1 shown, when the first control valve 3 is in the first working state, the first heating circuit 21 is isolated from the battery cooling circuit 1; as Figure 3 shown, when the first control valve 3 is in the second working state, the heating device 211 and the battery cooling circuit 1 form a battery heating circuit, and / or the heating device 211 and the heating circuit 212 form an air-conditioning heating circuit; or, as Figure 6 shown, when the first control valve 3 is in the second working state, the battery cooling circuit 1 and the heating circuit 212 form an air-conditioning heating circuit.

[0068] As an example, when the first control valve 3 is in the first working state, the first heating circuit 21 is isolated from the battery cooling circuit 1. The battery cooling circuit 1 is used to cool the battery 11, and the first heating circuit 21 is used to raise the temperature of the cockpit.

[0069] As an example, as Figure 1 shown, when the battery 11 needs to be heated and the first control valve 3 is in the second working state, the heating device 211 and the battery cooling circuit 1 form a battery heating circuit, and / or the heating device 211 and the heating circuit 212 form an air-conditioning heating circuit. The heat generated by the heating device 211 is used for heating the battery 11 through the battery heating circuit, and the temperature of the vehicle cockpit is raised through the air-conditioning heating circuit, improving the energy utilization rate.

[0070] As an example, as Figure 3 shown, when the battery 11 needs to be cooled and the temperature of the cockpit needs to be raised, the control device can be used to control the first control valve 3 to be in the second working state, so that the battery cooling circuit 1 and the heating circuit 212 form an air-conditioning heating circuit, thereby using the heat generated by the battery 11 as the heat source for raising the temperature of the vehicle cockpit and improving the energy utilization rate.

[0071] In one embodiment, as Figure 1 shown, the heating circuit 2 further includes an engine cooling circuit 22 and a second control valve 23; the first heating circuit 21 and the engine cooling circuit 22 are connected through the second control valve 23.

[0072] As an example, the second control valve 23 is a four-way control valve. The first end and the second end of the second control valve 23 are connected to the first heating circuit 21, and the third end and the fourth end of the second control valve 23 are connected to the engine cooling circuit 22.

[0073] In this embodiment, the first heating circuit 21 and the engine cooling circuit 22 are connected through the second control valve 23. As Figure 3 shown, when the battery 11 needs to be heated and / or the vehicle cockpit needs to be heated, the first heating circuit 21 and the engine cooling circuit 22 can be connected through the second control valve 23, and the heat generated by the engine 221 in the engine cooling circuit 22 can be used to heat the battery 11 and / or increase the temperature of the vehicle cockpit, improving the energy utilization rate.

[0074] As an example, the engine cooling circuit 22 includes an engine 221, a fourth water pump 222, a thermostat 223, and a second radiator 224. The engine 221, the fourth water pump 222, the first end of the thermostat 223, and the second end of the thermostat 223 are serially arranged between the third end and the fourth end of the four-way control valve; the third end of the thermostat 223 is connected to the fourth water pump 222. The thermostat 223 is used to adjust the refrigeration temperature of the engine 221; and the engine 221, the fourth water pump 222, the first end of the thermostat 223, and the second end of the thermostat 223 are serially arranged between the first end and the second end of the second radiator 224. It should be noted that when the heat generated by the engine 221 in the engine cooling circuit 22 is used to heat the battery 11 and / or increase the temperature of the vehicle cockpit, the second radiator 224 does not work.

[0075] In one embodiment, as Figure 3 shown, when the second control valve 23 is in the first working state, the engine cooling circuit 22, the heating device 211, and the battery cooling circuit 1 form a battery heating circuit, and / or, the engine cooling circuit 22, the heating device 211, and the heating circuit 212 form an air-conditioning heating circuit; as Figure 5 or Figure 6 shown, when the second control valve 23 is in the second working state, the engine cooling circuit 22 and the first heating circuit 21 are isolated from each other.

[0076] As an example, as Figure 3As shown, when the second control valve 23 is in the first working state, the first end and the second end of the second control valve 23 are not conducting, the first end and the third end of the second control valve 23 are conducting, the second end and the fourth end of the second control valve 23 are conducting, and the first control valve 3 is in the second working state. The engine cooling circuit 22, the heating device 211, and the battery cooling circuit 1 form a battery heating circuit. When the heat in the engine cooling circuit 22 is insufficient, the heat generated by the engine cooling circuit 22 and / or the heating device 211 together heats the battery 11 through the battery heating circuit, and / or the heat generated by the engine cooling circuit 22 and the heating device 211 together raises the temperature of the vehicle cockpit through the air-conditioning heating circuit.

[0077] As an example, as Figure 5 shown, when the battery 11 needs to be cooled and the vehicle cockpit needs to be cooled down, the control device controls the first control valve 3 to be in the first working state, isolates the battery cooling circuit 1 and the heating circuit 2 through the first control valve 3. When the second control valve 23 is in the second working state, the first end and the second end of the second control valve 23 are conducting, the first end and the third end of the second control valve 23 are not conducting, the second end and the fourth end of the second control valve 23 are not conducting. The second control valve 23 isolates the engine cooling circuit 22 and the first heating circuit 21 in the heating circuit 2, and controls the heating circuit 212 not to work, so that the battery cooling circuit 1 and the engine cooling circuit 22 operate independently.

[0078] As an example, as Figure 6 shown, when the engine 221 is not working, the battery 11 needs to be cooled, and the vehicle cockpit needs to be heated up, the control device controls the first control valve 3 to be in the second working state, and controls the second control valve 23 to be in the second working state, and controls the heating circuit 212 to work. The heat generated by the battery 11 and / or the heating device 211 is used as the heat source for raising the temperature of the vehicle cockpit, improving the energy utilization rate.

[0079] In an embodiment, as Figure 1 shown, the battery cooling circuit 1 further includes an electric drive cooling circuit 14; the electric drive cooling circuit 14 includes a first radiator 141, a second water pump 142, and an electric drive system 143 connected in series; the first radiator 141 is used for heat exchange with the battery 11.

[0080] Furthermore, the electric drive cooling circuit 14 further includes a coolant. The electric drive system 143 is used to drive the second water pump 142 to work. In this embodiment, the battery cooling circuit 1 further includes the electric drive cooling circuit 14; the electric drive cooling circuit 14 includes a first radiator 141, a second water pump 142 and an electric drive system 143 connected in series; the first radiator 141 is used to perform heat exchange with the battery 11, so that the battery cooler 123 of the refrigeration circuit 12 and the electric drive cooling circuit 14 cool the battery 11 to improve the reliability of battery 11 cooling.

[0081] This embodiment provides a vehicle, including the above-mentioned battery 11 thermal management system.

[0082] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A battery thermal management system, characterized in that, Comprising a battery cooling circuit, a heating circuit and a first control valve; The battery cooling circuit is connected to the heating circuit through the first control valve; When the first control valve is in the first working state, the battery cooling circuit is used to cool the battery; When the first control valve is in the second working state, the battery cooling circuit and the heating circuit form a battery heating circuit, and the battery heating circuit is used to heat the battery.

2. The battery thermal management system according to claim 1, wherein The battery cooling circuit includes a battery, a refrigeration circuit and a first water pump; The battery, the refrigeration circuit and the first water pump are connected in series between the first end and the second end of the first control valve; The third end of the first control valve is connected to the heating circuit.

3. The battery thermal management system according to claim 2, characterized in that The refrigeration circuit includes a condenser, a compressor and a battery cooler connected in series; The battery, the battery cooler and the first water pump are connected in series between the first end and the second end of the first control valve.

4. The battery thermal management system according to claim 3, characterized in that, The refrigeration circuit further includes an evaporator; The evaporator is connected in parallel with the battery cooler, and the evaporator is used to form an air-conditioning refrigeration circuit with the condenser and the compressor.

5. The battery thermal management system according to claim 1, characterized in that, The heating circuit includes a first heating circuit; The first heating circuit is connected in series between the second end and the third end of the first control valve; When the first control valve is in the second working state, the first heating circuit is used to form the battery heating circuit with the battery cooling circuit.

6. The battery thermal management system according to claim 5, wherein, The first heating circuit includes a heating device and a warming circuit; The first end of the heating device is used to connect to the second end of the first control valve, and the second end of the heating device is connected to the third end of the first control valve; The warming circuit is connected in parallel with the heating device.

7. The battery thermal management system according to claim 6, characterized in that, When the first control valve is in the first working state, the first heating circuit and the battery cooling circuit are isolated from each other; When the first control valve is in the second working state, the heating device and the battery cooling circuit form a battery heating circuit, and / or, the heating device and the warming circuit form an air-conditioning heating circuit; Or, when the first control valve is in the second working state, the battery cooling circuit and the warming circuit form an air-conditioning heating circuit.

8. The battery thermal management system according to claim 6, characterized in that, The heating circuit further includes an engine cooling circuit and a second control valve; The first heating circuit and the engine cooling circuit are connected through the second control valve.

9. The battery thermal management system according to claim 8, characterized in that, When the second control valve is in the first working state, the engine cooling circuit, the heating device and the battery cooling circuit form a battery heating circuit, and / or, the engine cooling circuit, the heating device and the warming circuit form an air-conditioning heating circuit; When the second control valve is in the second working state, the engine cooling circuit and the first heating circuit are isolated from each other.

10. A vehicle, characterized in that, Including the battery thermal management system according to any one of claims 1 to 9.

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