Thermal management system and battery energy storage device

Abstract

The invention provides a heat management system and battery energy storage equipment, and the heat management system comprises a refrigerant loop which is provided with a compressor, a first heat exchange part of a first heat exchanger and a first heat exchange part of a second heat exchanger; the first cooling liquid flow path is provided with a battery cold plate, a heater, a first pump, a first joint point and a second joint point, and the first pump is arranged between the first joint point and the battery cold plate; a third heat exchanger and a second pump are arranged on the second cooling liquid flow path, the second cooling liquid flow path can communicate with the first joint point and the second joint point, and the second pump is arranged between the second joint point and the third heat exchanger; a second heat exchange part of the first heat exchanger is arranged on the third cooling liquid flow path, and the third cooling liquid flow path can communicate with the first joint point and the second joint point; a second heat exchange part of the second heat exchanger is arranged on the fourth cooling liquid flow path, and the fourth cooling liquid flow path can communicate with the first joint point and the second joint point.

Description

Technical Field

[0001] The present disclosure relates to a thermal management system and a battery energy storage device. Background Art

[0002] New energy storage is an important technology and basic equipment for building a new power system. It is an important support for achieving the goals of carbon peak and carbon neutrality. It is also an important field for giving birth to new domestic energy formats and seizing new international strategic heights. Its continuous and stable operation is inseparable from the cooperation of the thermal management system. The thermal management system of energy storage equipment uses a combination of refrigerant and coolant to take away heat when the equipment is hot, and provide heat to the equipment when the temperature on the battery side of the equipment is too low, so as to maintain the equipment within a suitable temperature range, ensure service life, and avoid safety risks.

[0003] If the heat released by the energy storage equipment cannot be dissipated in time, it will have a great impact on the life and safety of the energy storage equipment.

[0004] The efficiency of known thermal management systems can no longer meet the demand, and the modules are complex to connect, bulky and costly. Summary of the invention

[0005] Therefore, an object of the present disclosure is to provide a thermal management system and a battery energy storage device, wherein the thermal management system effectively utilizes natural cooling and a water source heat pump, has significantly improved efficiency and significantly improved energy saving effects.

[0006] The above objectives are achieved through the thermal management system and battery energy storage device described below.

[0007] The present disclosure provides a thermal management system, comprising: a refrigerant circuit, on which a compressor, a first heat exchange portion of a first heat exchanger, and a first heat exchange portion of a second heat exchanger are arranged; a first coolant flow path, on which a battery cold plate, a heater, a first pump, a first junction, and a second junction are arranged, wherein the first pump is arranged between the first junction and the battery cold plate; a second coolant flow path, on which a third heat exchanger and a second pump are arranged and can be communicated with the first junction and the second junction, respectively, wherein the second pump is arranged between the second junction and the third heat exchanger; a third coolant flow path, on which the second heat exchange portion of the first heat exchanger is arranged and can be communicated with the first junction and the second junction, respectively; and a fourth coolant flow path, on which the second heat exchange portion of the second heat exchanger is arranged and can be communicated with the first junction and the second junction, respectively.

[0008] According to one embodiment, a first multi-way valve is arranged at the first junction, and a second multi-way valve is arranged at the second junction.

[0009] According to one embodiment, each of the first multi-way valve and the second multi-way valve has at least four ports.

[0010] According to one embodiment, the first coolant flow path is respectively communicated with the third port of the first multi-way valve and the third port of the second multi-way valve; the second coolant flow path is respectively communicated with the first port of the first multi-way valve and the first port of the second multi-way valve; the third coolant flow path is respectively communicated with the second port of the first multi-way valve and the second port of the second multi-way valve; the fourth coolant flow path is respectively communicated with the fourth port of the first multi-way valve and the fourth port of the second multi-way valve.

[0011] According to one embodiment, the first multi-way valve and the second multi-way valve include a first operating condition, wherein, in the first operating condition, the first port of the first multi-way valve is in communication with the third port of the first multi-way valve, and the first port of the second multi-way valve is in communication with the third port of the second multi-way valve.

[0012] According to one embodiment, the first multi-way valve and the second multi-way valve include a second operating condition, wherein, in the second operating condition, the first port of the first multi-way valve is in communication with the second port of the first multi-way valve, the third port of the first multi-way valve is in communication with the fourth port of the first multi-way valve, the first port of the second multi-way valve is in communication with the second port of the second multi-way valve, and the third port of the second multi-way valve is in communication with the fourth port of the second multi-way valve.

[0013] According to one embodiment, the first multi-way valve and the second multi-way valve include a third operating condition, wherein, in the third operating condition, the first port of the first multi-way valve is in communication with the fourth port of the first multi-way valve, the second port of the first multi-way valve is in communication with the third port of the first multi-way valve, the first port of the second multi-way valve is in communication with the fourth port of the second multi-way valve, and the second port of the second multi-way valve is in communication with the third port of the second multi-way valve.

[0014] According to one embodiment, when the first multi-way valve and the second multi-way valve are in the first operating condition, the thermal management system includes a conventional refrigeration mode and a low-temperature heating mode, wherein, in the conventional refrigeration mode, the heater is turned off; in the low-temperature heating mode, the heater is turned on.

[0015] According to one embodiment, when the first multi-way valve and the second multi-way valve are in the second operating condition, the thermal management system includes a refrigeration mode and a standby mode, wherein, in the refrigeration mode, the compressor, the first heat exchanger and the second heat exchanger are turned on; in the standby mode, the compressor, the first heat exchanger, the first heat exchange part of the second heat exchanger and the third heat exchanger are turned off.

[0016] According to one embodiment, a filter and a sensor are further provided on the first coolant flow path.

[0017] According to one embodiment, the thermal management system further includes a fifth coolant flow path and a sixth coolant flow path. A coolant reservoir is provided on the fifth coolant flow path, and a controller is provided on the sixth coolant flow path.

[0018] According to one embodiment, the thermal management system further includes a fan (13), and the fan is disposed downstream of the third heat exchanger in the air flow direction.

[0019] The present disclosure also provides a battery energy storage device including the thermal management system as described above.

[0020] The advantages of the thermal management system and the battery energy storage device of the present disclosure are as follows: By using two multi-way valves to connect each coolant flow path, natural cooling and water source heat pump working modes can be achieved, so that the efficiency is significantly improved and the energy saving effect is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments of the present disclosure will be briefly introduced below. Among them, the drawings are only used to show some embodiments of the present disclosure, rather than limiting all embodiments of the present disclosure thereto. In the drawings:

[0022] Figure 1 Shows a connection schematic diagram of a thermal management system according to an embodiment of the present disclosure;

[0023] Figure 2 Shows a schematic diagram of the refrigeration mode of a thermal management system according to an embodiment of the present disclosure;

[0024] Figure 3 Shows a schematic diagram of the conventional refrigeration mode of a thermal management system according to an embodiment of the present disclosure;

[0025] Figure 4 Shows a schematic diagram of the low-temperature heating mode of a thermal management system according to an embodiment of the present disclosure;

[0026] Figure 5 Shows a schematic diagram of the conventional heating mode of a thermal management system according to an embodiment of the present disclosure; and

[0027] Figure 6 Shows a schematic diagram of the standby mode of a thermal management system according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the objectives, technical solutions, and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present disclosure. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts belong to the scope of protection of the present disclosure.

[0029] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", and similar terms used in the specification and claims of the present patent application do not denote any order, quantity, or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "an" do not necessarily denote a quantity limitation. Terms such as "comprising", "including", or "having" mean that the elements or items appearing before the term cover the elements or items listed after the term and their equivalents, without excluding other elements or items. Terms such as "connected" or "communicated" are not limited to the physical or mechanical connections or communications shown in the drawings, but may include equivalent connections or communications thereto, whether direct or indirect. Terms such as "upper", "lower", "left", and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0030] The following refers to Figures 1 to 6 Describe in detail each implementation manner of the thermal management system according to the embodiments of the present disclosure. The thermal management system according to the present disclosure can be used in battery energy storage devices and can also be used in new energy vehicles, such as electric vehicles, hybrid vehicles, etc. For example, the thermal management system according to the present disclosure can be used for heat dissipation during the charging and discharging of various power batteries, improving the battery life. For example, the battery energy storage device according to the present disclosure can include Figures 1 to 6 the thermal management system and battery cells shown in , where the thermal management system and battery cells can be arranged in the same housing, and the housing can be in the form of a container or a cabinet.

[0031] As Figure 1 shown, the thermal management system according to the present disclosure can include a refrigerant circuit C1 and multiple coolant flow paths. The refrigerant flowing in the refrigerant circuit can be a common refrigerant, which will not be elaborated here. The coolant flowing in the coolant flow paths is, for example, ethylene glycol, etc.

[0032] A compressor 1, a first heat exchange part 21 of a first heat exchanger 2, and a first heat exchange part 31 of a second heat exchanger 3 are provided on a refrigerant circuit C1. For example, the first heat exchanger 2 is a water-cooled condenser. For example, the second heat exchanger 3 may be a combined device of a chiller and an expansion valve (e.g., an electronic expansion valve). The compressor 1 conveys refrigerant to the first heat exchange part 21 of the first heat exchanger 2, passes through the first heat exchange part 31 of the second heat exchanger 3, and returns to the compressor 1. During the phase change process of the refrigerant, heat exchange occurs with the coolant to take away the heat generated by the battery.

[0033] The thermal management system of the present disclosure may include a first coolant flow path L1, a second coolant flow path L2, a third coolant flow path L3, and a fourth coolant flow path L4. Additionally, the thermal management system may further include a fifth coolant flow path L5 and a sixth coolant flow path L6.

[0034] A battery cold plate 4, a heater 5, a first pump 9, a first joint P1, and a second joint P2 are provided on the first coolant flow path L1. Here, the joint is used for the purpose of convenient description and does not represent that there is a single point here. For example, the first pump 9 is provided between the first joint P1 and the battery cold plate 4 to circulate the coolant in the coolant flow path, for example, to pump the coolant into the flow path, complete heat exchange, and then flow back to the battery cold plate 4. The battery cells of the battery energy storage device may be provided on and in contact with the battery cold plate 4. The battery cold plate 4 may be provided with a zigzag or curved pipe communicating with the first coolant flow path L1 for the coolant to flow through and exchange heat. In addition, a filter 11 and sensors 15, 16 may also be provided on the first coolant flow path L1. The filter 11 can be used to filter impurities in the coolant, such as sediment, to avoid pipe blockage. For example, the filter 11 may be provided between the first pump 9 and the battery cold plate 4. The sensors 15, 16 may be temperature and pressure sensors for monitoring the temperature and pressure of the coolant, feeding back signals to the controller, and the controller adjusts the working mode of the thermal management system according to the internal control logic. For example, the sensor 15 is provided near the inlet of the battery cold plate 4, and the sensor 16 is provided near the outlet of the battery cold plate 4.

[0035] A third heat exchanger 6 and a second pump 10 are provided on the second coolant flow path L2 and can be respectively communicated with the first joint P1 and the second joint P2. For example, the second pump 10 is provided between the second joint P2 and the third heat exchanger 6 to circulate the coolant in the coolant flow path. For example, the third heat exchanger 6 is a low-temperature radiator. The thermal management system of the present disclosure may also include a fan 13, generally provided on one side of the third heat exchanger 6 (such as an air-cooled heat exchanger) to enable heat exchange between air and the system fluid.

[0036] The second heat exchange part 22 of the first heat exchanger 2 is provided on the third coolant flow path L3 and can be respectively communicated with the first joint point P1 and the second joint point P2. The second heat exchange part 32 of the second heat exchanger 3 is provided on the fourth coolant flow path L4 and can be respectively communicated with the first joint point P1 and the second joint point P2. This realizes the heat exchange of the two heat exchange parts, can improve the heat exchange efficiency of the whole system, and reduce the volume of the system.

[0037] A coolant reservoir 12 is provided on the fifth coolant flow path L5. The coolant reservoir 12 is, for example, an expansion water tank and is used to supplement coolant to the coolant flow path. Only the connection mode of the fifth coolant flow path L5 in the system architecture is schematically shown in the figure. The fifth coolant flow path L5 supplies supplementary coolant to the first coolant flow path L1 and the fourth coolant flow path L4 and discharges the gas in the system to ensure the smooth operation of the system.

[0038] A controller 14 is provided on the sixth coolant flow path L6. The controller 14 controls the operation of the compressor 1, the first pump 9, the second pump 10, the fan 13, the sensors 15, 16, etc. Among them, to ensure good heat dissipation during the operation of the controller 14, the heat generation of the components is simulated in advance, and part of the coolant is diverted into the water flow path arranged in the control box for heat exchange to take away the heat generation and ensure the normal operation of each component and avoid safety risks.

[0039] See again Figure 1 , a first multi-way valve 7 is provided at the first joint point P1, and a second multi-way valve 8 is provided at the second joint point P2. The first multi-way valve 7 and the second multi-way valve 8 can each have at least four ports. For example, both the first multi-way valve 7 and the second multi-way valve 8 are four-way valves. As Figures 2 to 6 shown, the first multi-way valve 7 includes a first port 71, a second port 72, a third port 73, and a fourth port 74; the second multi-way valve 8 includes a first port 81, a second port 82, a third port 83, and a fourth port 84. The connection mode between different ports of the same multi-way valve is determined according to the situation. By providing two multi-way valves to connect multiple coolant flow paths, the number of valves and pipelines used can be reduced, the volume of the system can be reduced, and costs can be saved. Of course, a component composed of multiple valves can be provided at or near the first joint point P1 and / or the second joint point P2 as long as the purpose of the present disclosure is achieved.

[0040] As Figures 2 to 6As shown, the first coolant flow path L1 is respectively connected to the third port 73 of the first multi-way valve 7 and the third port 83 of the second multi-way valve 8; the second coolant flow path L2 is respectively connected to the first port 71 of the first multi-way valve 7 and the first port 81 of the second multi-way valve 8; the third coolant flow path L3 is respectively connected to the second port 72 of the first multi-way valve 7 and the second port 82 of the second multi-way valve 8; the fourth coolant flow path L4 is respectively connected to the fourth port 74 of the first multi-way valve 7 and the fourth port 84 of the second multi-way valve 8.

[0041] As Figure 3 and 4 shown, the first multi-way valve 7 and the second multi-way valve 8 include a first operating condition. In the first operating condition, the first port 71 of the first multi-way valve 7 is in communication with the third port 73 of the first multi-way valve 7, and the first port 81 of the second multi-way valve 8 is in communication with the third port 83 of the second multi-way valve 8. Figure 3 and 4 The darker lines in

[0042] As Figure 3 shown, the thermal management system is in the conventional refrigeration mode, and the first multi-way valve 7 and the second multi-way valve 8 are in the first operating condition. At this time, the heater 5 is turned off, for example, under the control of the controller 14. In the conventional refrigeration mode, the heat dissipation requirement at the battery unit is not high. The coolant flows through the filter 11, the first pump 9, the first multi-way valve 7, the third heat exchanger 6, the second pump 10, the second multi-way valve 8, the heater 5, and enters the battery cold plate 4 and exchanges heat here. In this mode, the coolant does not pass through the first heat exchanger 2 and the second heat exchanger 3.

[0043] As Figure 4 shown, the thermal management system is in the low-temperature heating mode, and the first multi-way valve 7 and the second multi-way valve 8 are in the first operating condition. At this time, the heater 5 is turned on. The coolant flows through the filter 11, the first pump 9, the first multi-way valve 7, the third heat exchanger 6, the second pump 10, the second multi-way valve 8, and is heated at the heater 5 and then enters the battery cold plate 4 and exchanges heat at the battery cold plate 4. In this mode, the first heat exchanger 2 and the second heat exchanger 3 may not operate.

[0044] As Figure 2 and 6 shown, the first multi-way valve 7 and the second multi-way valve 8 include a second operating condition. In the second operating condition, the first port 71 of the first multi-way valve 7 is in communication with the second port 72 of the first multi-way valve 7, the third port 73 of the first multi-way valve 7 is in communication with the fourth port 74 of the first multi-way valve 7, the first port 81 of the second multi-way valve 8 is in communication with the second port 82 of the second multi-way valve 8, and the third port 83 of the second multi-way valve 8 is in communication with the fourth port 84 of the second multi-way valve 8.

[0045] AsFigure 2 As shown, the thermal management system is in the refrigeration mode, and the first multi-way valve 7 and the second multi-way valve 8 are in the second working condition. For example, under the control of the controller 14, on the refrigerant circuit C1, the refrigerant flows through the compressor 1, the first heat exchange part 21 of the first heat exchanger 2, and the second heat exchange part 31 of the second heat exchanger 3 in sequence, and absorbs the heat of the coolant in the fourth coolant flow path L4 flowing through the second heat exchange part 32 of the second heat exchanger 3 at the first heat exchange part 31 of the second heat exchanger 3. The coolant in the third coolant flow path L3 takes away the phase change heat generation of the first heat exchange part 21 of the first heat exchanger 2 at the second heat exchange part 22 of the first heat exchanger 2. The fourth coolant flow path L4 and the first coolant flow path L1 form a loop. Therefore, the coolant carrying the cold quantity from the refrigerant circuit C1 can flow into the battery cold plate 4 to cool the battery cells. In addition, the third coolant flow path L3 and the second coolant flow path L2 form a loop, and the heat of the coolant in this loop is taken away by the fan 13, and the air volume provided by the fan 13 can synchronously cool the heat-generating components such as the controller 14. It should be noted that Figure 2 The dotted lines in

[0046] As Figure 6 shown, the thermal management system is in the standby mode, and the first multi-way valve 7 and the second multi-way valve 8 are in the second working condition. At this time, the compressor 1, the first heat exchanger 2, the first heat exchange part 31 of the second heat exchanger 3, and the third heat exchanger 6 are closed, for example, under the control of the controller 14. Figure 6 The darker lines in

[0047] As Figure 5 shown, the first multi-way valve 7 and the second multi-way valve 8 include a third working condition. In the third working condition, the first port 71 of the first multi-way valve 7 is communicated with the fourth port 74 of the first multi-way valve 7, the second port 72 of the first multi-way valve 7 is communicated with the third port 73 of the first multi-way valve 7, the first port 81 of the second multi-way valve 8 is communicated with the fourth port 84 of the second multi-way valve 8, and the second port 82 of the second multi-way valve 8 is communicated with the third port 83 of the second multi-way valve 8.

[0048] As Figure 5As shown, the thermal management system is in the conventional heating mode, and the first multi-way valve 7 and the second multi-way valve 8 are in the third working condition. At this time, the compressor 1, the first heat exchanger 2, and the second heat exchanger 3 are all turned on, for example, under the control of the controller 14. In the refrigerant circuit C1, the refrigerant flows through the compressor 1, the first heat exchange part 21 of the first heat exchanger 2, and the second heat exchange part 31 of the second heat exchanger 3 in sequence, and absorbs the heat in the coolant in the fourth coolant flow path L4 flowing through the second heat exchange part 32 of the second heat exchanger 3 at the first heat exchange part 31 of the second heat exchanger 3, and transfers the heat to the coolant in the third coolant flow path L3 flowing through the second heat exchange part 22 of the first heat exchanger 2 at the first heat exchange part 21 of the first heat exchanger 2. The third coolant flow path L3 and the first coolant flow path L1 form a circuit. Therefore, the coolant carrying the heat from the refrigerant circuit C1 can flow into the battery cold plate 4 to heat the battery cells. In addition, the second coolant flow path L2 and the fourth coolant flow path L4 form a circuit. It should be noted that Figure 2 the dotted lines in are only for distinction and have no other meaning. In this mode, the thermal management system realizes a water source heat pump.

[0049] As described above, the thermal management system of the present disclosure can achieve natural cooling and a water source heat pump, with significantly improved efficiency and significantly improved energy-saving effect. The battery energy storage device of the present disclosure has the advantages of the thermal management system.

[0050] The technical features disclosed above are not limited to the combinations with other disclosed features. Those skilled in the art can also make other combinations among the technical features according to the purpose of the invention, subject to the purpose of the present disclosure.

Claims

1. A thermal management system, comprising: A refrigerant circuit (C1) provided with a compressor (1), a first heat exchange part (21) of a first heat exchanger (2), and a first heat exchange part (31) of a second heat exchanger (3); A first coolant flow path (L1) provided with a battery cold plate (4), a heater (5), a first pump (9), a first joint (P1), and a second joint (P2), wherein the first pump (9) is arranged between the first joint (P1) and the battery cold plate (4); A second coolant flow path (L2) provided with a third heat exchanger (6) and a second pump (10) and capable of being respectively communicated with the first joint (P1) and the second joint (P2), wherein the second pump (10) is arranged between the second joint (P2) and the third heat exchanger (6); A third coolant flow path (L3) provided with a second heat exchange part (22) of the first heat exchanger (2) and capable of being respectively communicated with the first joint (P1) and the second joint (P2); and A fourth coolant flow path (L4) provided with a second heat exchange part (32) of the second heat exchanger (3) and capable of being respectively communicated with the first joint (P1) and the second joint (P2).

2. The thermal management system according to claim 1, wherein, A first multi-way valve (7) is arranged at the first joint (P1), and a second multi-way valve (8) is arranged at the second joint (P2).

3. The thermal management system according to claim 2, wherein, Each of the first multi-way valve (7) and the second multi-way valve (8) has at least four ports.

4. The thermal management system according to claim 3, wherein, The first coolant flow path (L1) is respectively communicated with a third port (73) of the first multi-way valve (7) and a third port (83) of the second multi-way valve (8); The second coolant flow path (L2) is respectively communicated with a first port (71) of the first multi-way valve (7) and a first port (81) of the second multi-way valve (8); The third coolant flow path (L3) is respectively communicated with a second port (72) of the first multi-way valve (7) and a second port (82) of the second multi-way valve (8); The fourth coolant flow path (L4) is respectively communicated with a fourth port (74) of the first multi-way valve (7) and a fourth port (84) of the second multi-way valve (8).

5. The thermal management system according to claim 4, wherein, The first multi-way valve (7) and the second multi-way valve (8) include a first operating condition, wherein, in the first operating condition, a first port (71) of the first multi-way valve (7) is conducted with a third port (73) of the first multi-way valve (7), and a first port (81) of the second multi-way valve (8) is conducted with a third port (83) of the second multi-way valve (8).

6. The thermal management system according to claim 4, wherein, The first multi-way valve (7) and the second multi-way valve (8) include a second operating condition, Wherein, in the second operating condition, the first port (71) of the first multi-way valve (7) is in communication with the second port (72) of the first multi-way valve (7), the third port (73) of the first multi-way valve (7) is in communication with the fourth port (74) of the first multi-way valve (7), the first port (81) of the second multi-way valve (8) is in communication with the second port (82) of the second multi-way valve (8), and the third port (83) of the second multi-way valve (8) is in communication with the fourth port (84) of the second multi-way valve (8).

7. The thermal management system according to claim 4, wherein, The first multi-way valve (7) and the second multi-way valve (8) include a third operating condition. Wherein, in the third operating condition, the first port (71) of the first multi-way valve (7) is in communication with the fourth port (74) of the first multi-way valve (7), the second port (72) of the first multi-way valve (7) is in communication with the third port (73) of the first multi-way valve (7), the first port (81) of the second multi-way valve (8) is in communication with the fourth port (84) of the second multi-way valve (8), and the second port (82) of the second multi-way valve (8) is in communication with the third port (83) of the second multi-way valve (8).

8. The thermal management system according to claim 5, wherein, When the first multi-way valve (7) and the second multi-way valve (8) are in the first operating condition, the thermal management system includes a conventional refrigeration mode and a low-temperature heating mode, wherein in the conventional refrigeration mode, the heater (5) is turned off; in the low-temperature heating mode, the heater (5) is turned on.

9. The thermal management system according to claim 6, wherein, When the first multi-way valve (7) and the second multi-way valve (8) are in the second operating condition, the thermal management system includes a refrigeration mode and a standby mode, wherein in the refrigeration mode, the compressor (1), the first heat exchanger (2) and the second heat exchanger (3) are turned on; in the standby mode, the compressor (1), the first heat exchanger (2), the first heat exchange part (31) of the second heat exchanger (3) and the third heat exchanger (6) are turned off.

10. The thermal management system according to any one of claims 1 to 9, wherein, A filter (11) and sensors (15, 16) are further provided on the first coolant flow path (L1).

11. The thermal management system according to any one of claims 1 to 9, wherein, The thermal management system further includes a fifth coolant flow path (L5) and a sixth coolant flow path (L6). A coolant reservoir (12) is provided on the fifth coolant flow path (L5), and a controller (14) is provided on the sixth coolant flow path (L6).

12. The thermal management system according to any one of claims 1 to 9, wherein, The thermal management system further includes a blower (13), which is arranged downstream of the third heat exchanger (6) in the air flow direction.

13. A battery energy storage device, comprising the thermal management system according to any one of claims 1 to 12.

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