Thermal management system and energy storage system

Abstract

The invention discloses a heat management system and an energy storage system. The heat management system comprises a battery heat exchange plate for a heat exchange medium to flow through; a heat exchange medium flows through the first phase change module, and the first phase change module has a cold storage function and a cold discharge function; the cooling module is used for allowing the heat exchange medium to flow through and providing cooling capacity; in the cold storage mode, the cooling module and the first phase change module are connected in series and are arranged in the cold storage circulation loop, and the cooling module is in a running state, so that the first phase change module stores cold; in the first cooling mode, the cooling module, the first phase change module and the battery heat exchange plate are connected in series and are arranged in the first circulation loop, the first phase change module is used for cooling, or the first phase change module is used for cooling and the cooling module operates, so that the heat exchange medium in the first circulation loop is cooled. Wherein the first phase change module can recover the low-grade cooling capacity provided by the cooling module, and the cooling capacity is used for cooling the battery unit, so that the power consumption of the thermal management system is reduced, and the use cost of the thermal management system is reduced.

Description

Technical Field

[0001] This application relates to the technical field of thermal management of energy storage systems, and more specifically, to a thermal management system and an energy storage system. Background Art

[0002] In an energy storage system, a thermal management system is used to dissipate heat from devices such as battery cells and energy storage inverters. However, the power consumption of the thermal management system is relatively large and the usage cost is relatively high.

[0003] In summary, how to reduce the power consumption of the thermal management system and lower the usage cost of the thermal management system are problems that those skilled in the art need to solve urgently at present. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a thermal management system and an energy storage system to reduce the power consumption of the thermal management system and lower the usage cost of the thermal management system.

[0005] To achieve the above purpose, this application provides the following technical solutions:

[0006] A thermal management system, comprising:

[0007] A battery heat exchange plate, which is used for allowing a heat exchange medium to flow through and performing heat exchange with a battery cell;

[0008] A first phase change module, which has a cold storage function and a cold release function and is used for allowing a heat exchange medium to flow through;

[0009] A cooling module, which is used for allowing a heat exchange medium to flow through and can provide cold energy;

[0010] Wherein, the thermal management system has a cold storage mode and a first cooling mode;

[0011] In the cold storage mode, the cooling module and the first phase change module are connected in series in a cold storage circulation loop, and the cooling module is in an operating state to enable the first phase change module to store cold;

[0012] In the first cooling mode, the cooling module, the first phase change module and the battery heat exchange plate are connected in series in a first circulation loop, and the first phase change module is used for releasing cold, or the first phase change module is used for releasing cold and the cooling module operates to cool the heat exchange medium in the first circulation loop.

[0013] Optionally, the cold storage circulation loop includes at least one of the first circulation loop and the second circulation loop;

[0014] Wherein, in the cold storage mode and when the first circulation loop is the cold storage circulation loop, the cooling module, the first phase change module, and the battery heat exchange plate are connected in series in the first circulation loop;

[0015] In the cold storage mode and when the second circulation loop is the cold storage circulation loop, the cooling module and the first phase change module are connected in series in the second circulation loop, the battery heat exchange plate is located outside the second circulation loop, and the battery heat exchange plate and the second circulation loop are relatively independent.

[0016] Optionally, the cooling module includes at least one of a compression refrigeration module and a first air cooling module;

[0017] The compression refrigeration module includes a first heat exchanger, the first heat exchanger includes a first heat exchange channel and a second heat exchange channel capable of performing heat exchange, the second heat exchange channel is for the refrigerant to flow through, and the first heat exchange channel is for the heat exchange medium to flow through; when the compression refrigeration module is operating, the heat exchange medium in the first heat exchange channel is cooled;

[0018] The first air cooling module includes a first target radiator and a first target fan, and the first target radiator is for the heat exchange medium to flow through; when the first air cooling module is operating, the heat exchange medium in the first target radiator is cooled.

[0019] Optionally, when the cooling module includes a compression refrigeration module, the thermal management system further has a second cooling mode; in the second cooling mode, the first heat exchange channel and the battery heat exchange plate are connected in series in a third circulation loop, and the compression refrigeration module is in an operating state to cool the battery heat exchange plate.

[0020] Optionally, when the cooling module includes a first air cooling module, the thermal management system further has a third cooling mode; in the third cooling mode, the first target radiator and the battery heat exchange plate are connected in series in a third circulation loop, and the first air cooling module is in an operating state to cool the battery heat exchange plate.

[0021] Optionally, the first target radiator includes a first radiator and / or the first heat exchanger, and the first target fan includes a first fan and / or a second fan;

[0022] Wherein, the first radiator is for the heat exchange medium to flow through, the first fan and the first radiator are used in cooperation, and the first heat exchanger and the second fan are used in cooperation.

[0023] Optionally, when the cooling module only includes the compression refrigeration module, the cold storage circulation loop is the first circulation loop. In the cold storage mode and the first cooling mode, the first heat exchange channel, the first phase change module, and the battery heat exchange plate are connected in series and in the first circulation loop.

[0024] Optionally, when the cooling module only includes the first air cooling module, the cold storage circulation loop includes at least one of the first circulation loop and the second circulation loop;

[0025] In the cold storage mode when the first circulation loop is the cold storage circulation loop, and in the first cooling mode, the first target radiator, the first phase change module, and the battery heat exchange plate are connected in series and in the first circulation loop;

[0026] In the cold storage mode when the second circulation loop is the cold storage circulation loop, the first target radiator is connected in series with the first phase change module and in the second circulation loop.

[0027] Optionally, when the cooling module includes the compression refrigeration module and the first air cooling module, the cold storage circulation loop includes the first circulation loop and the third circulation loop, or the cold storage circulation loop is the first circulation loop;

[0028] In the cold storage mode when the first circulation loop is the cold storage circulation loop, and in the first cooling mode, the first target radiator, the first heat exchange channel, the first phase change module, and the battery heat exchange plate are connected in series and in the first circulation loop;

[0029] In the cold storage mode when the second circulation loop is the cold storage circulation loop, the first target radiator is connected in series with the first phase change module and in the second circulation loop.

[0030] Optionally, the thermal management system further includes a first pipeline coupling device. The first port of the first heat exchange channel, the first port of the first radiator, the first port of the first phase change module, and the first port of the battery heat exchange plate are all connected to the first pipeline coupling device;

[0031] The second port of the first heat exchange channel can communicate with the second port of the battery heat exchange plate, and the second port of the first radiator can communicate with the second port of the first phase change module;

[0032] The first pipeline coupling device has a first state and a second state. In the first state, the battery heat exchange plate, the first phase change module, the first radiator, and the first heat exchange channel are connected in series and are in the first circulation loop; in the second state, the first phase change module and the first radiator are connected in series and are in the second circulation loop, and the battery heat exchange plate and the first heat exchange channel are connected in series and are in the third circulation loop.

[0033] Optionally, the second fan and the first heat exchanger are both arranged in the battery compartment of the battery unit; the thermal management system further has a dehumidification mode, and in the dehumidification mode, the second fan is in an operating state.

[0034] Optionally, the thermal management system further includes:

[0035] A second phase change module, which has a heat storage function and a heat release function, and is used for the heat exchange medium to flow through. The phase change temperature of the phase change material in the second phase change module is higher than the phase change temperature of the phase change material in the first phase change module;

[0036] A heating module, which is used for the heat exchange medium to flow through and can provide heat;

[0037] Wherein, the thermal management system has a heat storage mode and a heat release mode;

[0038] In the heat storage mode, the heating module and the second phase change module are connected in series and are in the fourth circulation loop. The heating module is in an operating state to enable the second phase change module to store heat;

[0039] In the heat release mode, the second phase change module and the battery heat exchange plate are connected in series and are in the fifth circulation loop. The second phase change module is used to release heat to heat the heat exchange medium in the fifth circulation loop.

[0040] Optionally, the heating module includes at least one of a heat exchange plate of an energy storage converter, an electric heater, and a second heat exchanger of a compression refrigeration module;

[0041] The heat exchange plate of the energy storage converter is used for the heat exchange medium to flow through and perform heat exchange with the energy storage converter; when the heat exchange plate of the energy storage converter is in an operating state, it heats the heat exchange medium in the fourth circulation loop to enable the second phase change module to store heat;

[0042] The second heat exchanger includes: a third heat exchange channel and a fourth heat exchange channel capable of performing heat exchange. The fourth heat exchange channel is used for the refrigerant to flow through, and the third heat exchange channel is used for the heat exchange medium to flow through; when the compression refrigeration module is in an operating state, it heats the heat exchange medium in the third heat exchange channel to enable the second phase change module to store heat;

[0043] The electric heater is for a heat exchange medium to flow through; when the electric heater is in an operating state, it heats the heat exchange medium in the fourth circulation loop to enable the second phase change module to store heat.

[0044] Optionally, when the heating module includes at least two of the energy storage converter heat exchange plate, the electric heater, and the second heat exchanger of the compression refrigeration module:

[0045] In the heat storage mode, the at least two are arranged in series.

[0046] Optionally, the thermal management system further includes a third fan, and the third fan and the second heat exchanger are correspondingly distributed.

[0047] Optionally, the thermal management system further includes a second air cooling module, and the second air cooling module includes a second target radiator and a second target fan;

[0048] The thermal management system has a fourth cooling mode. In the fourth cooling mode, the second target radiator and the energy storage converter heat exchange plate are in series in an air cooling circulation loop, and the second air cooling module is in an operating state.

[0049] Optionally, the second target radiator includes at least one of a second radiator and a second heat exchanger, the second target fan includes at least one of a third fan and a fourth fan, the second radiator and the fourth fan are used in cooperation, and the second heat exchanger and the third fan are used in cooperation.

[0050] Optionally, the air cooling circulation loop includes at least one of the fourth circulation loop and the sixth circulation loop;

[0051] In the fourth cooling mode and when the fourth circulation loop is the air cooling circulation loop, and in the heat storage mode, the second target radiator, the second phase change module, and the energy storage converter heat exchange plate are in series in the fourth circulation loop;

[0052] In the fourth cooling mode and when the sixth circulation loop is the air cooling circulation loop, the second target radiator and the energy storage converter heat exchange plate are in series in the sixth circulation loop, the second phase change module is outside the sixth circulation loop, and the second phase change module and the sixth circulation loop are relatively independent.

[0053] Optionally, the second target radiator includes a second radiator and a second heat exchanger, the second target fan includes a third fan and a fourth fan, the second radiator and the fourth fan are used in cooperation, and the second heat exchanger and the third fan are used in cooperation;

[0054] The thermal management system further includes a second pipeline coupling device, and the first port and the second port of the second phase change module, the first port of the energy storage converter heat exchange plate, and the first port and the second port of the battery heat exchange plate are all connected to the second pipeline coupling device;

[0055] In the second radiator and the third heat exchange channel of the second heat exchanger, the first port and the second port of the first one are both connected to the second pipeline coupling device, the first port of the second one is connected to the second pipeline coupling device, and the second port of the second one can communicate with the second port of the energy storage converter heat exchange plate;

[0056] The second pipeline coupling device has a third state, a fourth state, and a fifth state;

[0057] In the third state, the second phase change module, the second radiator, the third heat exchange channel, and the energy storage converter heat exchange plate are connected in series in the fourth circulation loop;

[0058] In the fourth state, the first one, the second phase change module, and the battery heat exchange plate are connected in series in the fifth circulation loop;

[0059] In the fifth state, in the second radiator and the third heat exchange channel of the second heat exchanger, the first one and the second phase change module are connected in series in the seventh circulation loop, and the second one and the energy storage converter heat exchange plate are connected in series in the sixth circulation loop.

[0060] Based on the above-provided thermal management system, the present application further provides an energy storage system, which includes: a battery unit, an energy storage converter, and the thermal management system according to any one of the above.

[0061] In the thermal management system provided by the present application, in the cold storage mode, the cooling module and the first phase change module are connected in series in the cold storage circulation loop, and the cooling module is in an operating state to realize cold storage of the first phase change module. In this way, the first phase change module can recover the low-grade cold energy provided by the cooling module; in the first cooling mode, the cooling module, the first phase change module, and the battery heat exchange plate are connected in series in the first circulation loop, then the first phase change module can release cold to provide cold energy, or the first phase change module releases cold and the cooling module operates to provide cold energy, and cool the heat exchange medium in the first circulation loop, thereby cooling the battery heat exchange plate, and further cooling the battery unit. Therefore, the first phase change module can use the low-grade cold energy recovered by itself to cool the battery unit, effectively reducing the power consumption of the thermal management system and lowering the usage cost of the thermal management system.

[0062] Moreover, during the valley electricity period, the thermal management system operates in a cold storage mode; during the peak electricity period, the thermal management system operates in a first cooling mode, which can further reduce the usage cost of the thermal management system.

[0063] In the thermal management system provided by the present application, in the first cooling mode, the cooling module, the first phase change module, and the battery heat exchange plate are connected in series in the first circulation loop. By controlling whether the cooling module operates, two modes can be achieved: the first phase change module provides cooling capacity, and both the first phase change module and the cooling module provide cooling capacity. This simplifies the structure of the thermal management system and also simplifies the control and use of the thermal management system. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the provided drawings.

[0065] Figure 1 Schematic structural diagram of the energy storage system provided by the embodiment of the present application;

[0066] Figure 2 Schematic structural diagram of the thermal management system provided by the embodiment of the present application;

[0067] Figure 3 Schematic structural diagram of the thermal management system provided by the embodiment of the present application in the first state;

[0068] Figure 4 Schematic structural diagram of the thermal management system provided by the embodiment of the present application in the second state;

[0069] Figure 5 Schematic structural diagram of the thermal management system provided by the embodiment of the present application in the third state;

[0070] Figure 6 Schematic structural diagram of the thermal management system provided by the embodiment of the present application in the fourth state;

[0071] Figure 7 Schematic structural diagram of the thermal management system provided by the embodiment of the present application in the fifth state;

[0072] Figure 8 Schematic structural diagram of the thermal management system provided by the embodiment of the present application in the sixth state;

[0073] Figure 9 Schematic structural diagram of the thermal management system provided by the embodiment of the present application in the seventh state;

[0074] Figure 10 It is a schematic structural diagram of the thermal management system provided by the embodiment of the present application in the eighth state;

[0075] Figure 11 It is a schematic structural diagram of the thermal management system provided by the embodiment of the present application in the ninth state;

[0076] Figure 12 It is a schematic structural diagram of the thermal management system provided by the embodiment of the present application in the tenth state.

[0077] Explanation of reference numerals:

[0078] 100 - Battery unit, 200 - Energy storage converter, 300 - Battery compartment;

[0079] 1 - Battery heat exchange plate, 2 - Energy storage converter heat exchange plate, 3 - First phase change module, 4 - Second phase change module, 5 - Compression refrigeration module, 51 - Compressor, 52 - First heat exchanger, 521 - First heat exchange channel, 522 - Second heat exchange channel, 53 - Throttling device, 54 - Drying filter, 55 - Second heat exchanger, 551 - Third heat exchange channel, 552 - Fourth heat exchange channel, 6 - Second fan, 7 - First radiator, 8 - First fan, 9 - First delivery pump, 10 - First pipeline coupling device, 10' - First four-way valve, 11 - Third four-way valve, 12 - Second radiator, 13 - Fourth fan, 14 - Second four-way valve, 15 - Electric heater, 16 - Third fan, 17 - Second delivery pump, 18 - Fourth four-way valve, 19 - First air-cooled module, 19a - First target radiator, 19b - First target fan, 20 - Second air-cooled module, 20a - Second target radiator, 21b - Second target fan, 21 - Cooling module, 22 - Heating module; 23 - First pipeline coupling device;

[0080] a - First valve port, b - Second valve port, c - Third valve port, d - Fourth valve port;

[0081] 01 - First circulation loop, 02 - Second circulation loop, 03 - Third circulation loop, 04 - Fourth circulation loop, 05 - Fifth circulation loop, 06 - Sixth circulation loop, 07 - Seventh circulation loop. Detailed implementation manners

[0082] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0083] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of the present application, the singular forms "a", "an", "the", "above", "said", "this" are also intended to include forms such as "one or more", unless the context clearly indicates otherwise. It should also be understood that in the embodiments of the present application, "one or more" means one, two or more than two; "and / or" describes the association relationship of associated objects and means that three relationships can exist; for example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally means that the associated objects before and after are in an "or" relationship.

[0084] Reference to "one embodiment" or "some embodiments" etc. described in this specification means that a specific feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0085] The multiple related to the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, words such as "first", "second", etc. are only used for the purpose of distinguishing descriptions and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0086] The embodiments of the present application provide a thermal management system and an energy storage system to reduce the power consumption of the thermal management system and the usage cost of the thermal management system.

[0087] As Figure 1 shown, the energy storage system provided by the embodiments of the present application includes: a battery unit 100, an energy storage converter 200, and a thermal management system.

[0088] The battery unit 100 can be a battery cluster, a battery pack, or other energy storage devices including battery modules. A battery compartment 300 can be provided in the housing of the energy storage system, and the battery unit 100 is located in the battery compartment 300.

[0089] The energy storage converter 200 is connected to the battery unit 100 and the power grid, or the energy storage converter 200 is connected to the battery unit 100 and the load, or both the power grid and the load are connected through the energy storage converter 200 and the battery unit 100 to achieve bidirectional conversion of electrical energy.

[0090] A converter cabin can be provided in the housing of the energy storage system, and the energy storage converter 200 is located in the converter cabin.

[0091] The thermal management system is used to perform thermal management on the battery unit 100, or the thermal management system is used to perform thermal management on the battery unit 100 and the energy storage converter 200.

[0092] As Figure 2 shown, the thermal management system includes: a battery heat exchange plate 1, a first phase change module 3, and a cooling module 21.

[0093] The battery heat exchange plate 1 is used for the heat exchange medium to flow through and perform heat exchange with the battery unit 100. Specifically, the battery heat exchange plate 1 has a heat exchange channel for the heat exchange medium to flow through, and the battery heat exchange plate 1 is thermally connected to the battery unit 100. To facilitate the thermal connection between the battery heat exchange plate 1 and the battery unit 100, the battery heat exchange plate 1 can be located in the battery cabin 300.

[0094] The first phase change module 3 is used for the heat exchange medium to flow through and is used to perform heat exchange with the heat exchange medium. The first phase change module 3 has a function of storing and releasing cold. Specifically, the first phase change module 3 includes a phase change material, and the phase change material forms a heat exchange channel for the heat exchange medium to flow through; or, the first phase change module 3 includes a phase change material and a heat exchange channel, and the phase change material and the heat exchange channel can perform heat exchange.

[0095] The state before and after the phase change material stores cold is selected according to the actual situation. Exemplarily, the phase change material can be in a liquid state before storing cold and in a solid state after storing cold; or the phase change material can be in a gaseous state before storing cold and in a solid or liquid state after storing cold.

[0096] The cooling module 21 is used for the heat exchange medium to flow through. Specifically, the cooling module 21 has a heat exchange channel for the heat exchange medium to flow through. It can be understood that the cooling module 21 is used to cool the heat exchange medium.

[0097] The specific structure of the cooling module 21 is selected according to the actual situation.

[0098] In the embodiment of the present application, the cooling module 21 includes a compression refrigeration module 5 and a first air cooling module 19.

[0099] The compression refrigeration module 5 includes: a compressor 51, a first heat exchanger 52, a throttling device 53, and a second heat exchanger 55. The first heat exchanger 52 includes a first heat exchange channel 521 and a second heat exchange channel 522 capable of heat exchange. The second heat exchange channel 522 is used for the refrigerant to flow through, and the first heat exchange channel 521 is used for the heat exchange medium to flow through. The compressor 51, the second heat exchange channel 522, the throttling device 53, and the second heat exchanger 55 are sequentially connected end to end to form a refrigeration circuit. Among them, the second heat exchange channel 522 is connected to the exhaust port of the compressor 51, and the second heat exchanger 55 is connected to the suction port of the compressor 51; the second heat exchange channel 522 can be used for the refrigerant to absorb heat. For example, the second heat exchange channel 522 can be used for the refrigerant to evaporate to absorb heat, and the second heat exchanger 55 can be used for the refrigerant to release heat. For example, the second heat exchanger 55 can be used for the refrigerant to condense to release heat. Therefore, when the compression refrigeration module 5 is operating, the heat exchange medium in the first heat exchange channel 521 can be cooled.

[0100] The compression refrigeration module 5 may further include a dryer filter 54. The dryer filter 54 is used to remove moisture and impurities in the refrigeration system to prevent the capillary tube from being blocked and reduce the corrosion of equipment and pipelines. The dryer filter 54 can be connected in series between the throttling device 53 and the second heat exchanger 55 or other positions.

[0101] The first air-cooling module 19 includes a first target radiator 19a and a first target fan 19b. The first target radiator 19a is used for the heat exchange medium to flow through. The first target fan 19b is used to drive air to flow through the first target radiator 19a to cool the heat exchange medium in the first target radiator 19a through the air. Therefore, when the first air-cooling module 19 is operating, that is, when the first target fan 19b is operating, the heat exchange medium in the first target radiator 19a can be cooled.

[0102] The first target radiator 19a may include a first radiator 7 and a first heat exchanger 52, and the first target fan 19b may include a first fan 8 and a second fan 6. The first fan 8 and the first radiator 7 are used in cooperation, and the second fan 6 and the first heat exchanger 52 are used in cooperation. In this way, different fans can be selected to work according to different needs, improving the flexibility of use of the thermal management system; moreover, the first target radiator 19a reuses the first heat exchanger 52 of the compression refrigeration module 5, simplifying the structure of the thermal management system and reducing the cost of the thermal management system; by setting the first radiator 7 and the first fan 8, the second circulation loop 02 mentioned later can be formed, enabling the first phase change module 3 to have more than one cold storage loop and further reducing the temperature of the medium in the first circulation loop 01.

[0103] It should be noted that both the first radiator 7 and the first heat exchanger 52 are used for the heat exchange medium to flow through. In the first target radiator 19a, the first heat exchange channel 521 in the first heat exchanger 52 allows the heat exchange medium to flow through, and the first heat exchange channel 521 serves as the first target radiator 19a.

[0104] Of course, the first target radiator 19a may also only include the first radiator 7, which can be understood as: the first target radiator 19a includes the first radiator 7 and does not include the first heat exchanger 52, and the first target fan 19b includes the first fan 8. Or, the first target radiator 19a only includes the first heat exchanger 52, which can be understood as: the first target radiator 19a includes the first heat exchanger 52 and does not include the first radiator 7, and the first target fan 19b includes the second fan 6.

[0105] When the first air-cooling module 19 includes the second fan 6 and the first heat exchanger 52, as Figure 2 shown, both the second fan 6 and the first heat exchanger 52 are arranged in the battery compartment 300 of the battery unit. In this way, the thermal management system also has a dehumidification mode. In the dehumidification mode, the second fan 6 is in an operating state. When the humidity in the battery compartment 300 is relatively high, the thermal management system is in the dehumidification mode. Under the action of the second fan 6, water vapor can condense on the surface of the first heat exchanger 52 to achieve dehumidification of the battery compartment 300.

[0106] In actual situations, the first target radiator 19a may also include other radiators, and the first target fan 19b may also include other fans, not limited to the above three aspects.

[0107] In the embodiments of the present application, the cooling module 21 may also only include the compression refrigeration module 5, which can be understood as: the cooling module 21 includes the compression refrigeration module 5 and does not include the first air-cooling module 19. For the description of the compression refrigeration module 5, reference can be made to the foregoing. The cooling module 21 may also only include the first air-cooling module 19, which can be understood as: the cooling module 21 includes the first air-cooling module 19 and does not include the compression refrigeration module 5. For the description of the first air-cooling module 19, reference can be made to the foregoing.

[0108] In actual situations, the cooling module 21 may also have other structures, and the embodiments of the present application do not limit this.

[0109] In the embodiments of the present application, the thermal management system has a cold storage mode and a first cooling mode.

[0110] As Figure 3 and Figure 4As shown, in the first cooling mode, the cooling module 21, the first phase change module 3, and the battery heat exchange plate 1 are connected in series in the first circulation loop 01. The first phase change module 3 is used to provide cooling capacity to cool the heat exchange medium in the first circulation loop 01; alternatively, both the first phase change module 3 and the cooling module 21 provide cooling capacity to cool the heat exchange medium in the first circulation loop 01. Among them, the first phase change module 3 provides cooling capacity by releasing cold, and the cooling module 21 operates to provide cooling capacity.

[0111] It should be noted that when the battery unit 100 needs to be cooled, the thermal management system will be in the first cooling mode. Before the thermal management system is in the first cooling mode, the first phase change module 3 needs to complete cold storage to ensure that the first phase change module 3 can provide cooling capacity in the first cooling mode. Figure 3 In [the figure], the green line is the low-temperature heat exchange medium flow path, and the red line is the high-temperature heat exchange medium flow path. Figure 4 In [the figure], the green line is the low-temperature heat exchange medium flow path, the blue line is the refrigerant flow path, and the red line is the high-temperature heat exchange medium flow path. The same applies to what is mentioned later. Figures 5 - 12 The same is true.

[0112] In order to reduce the power consumption of the thermal management system, the first phase change module 3 can first provide cooling capacity. When the cooling capacity provided by the first phase change module 3 is small, both the first phase change module 3 and the cooling module 21 can provide cooling capacity.

[0113] Exemplarily, when the temperature of the first phase change module 3 is lower than the phase change temperature of the first phase change module 3, the first phase change module 3 can provide cooling capacity and cool the battery heat exchange plate 1; when the temperature of the first phase change module 3 is equal to the phase change temperature of the first phase change module 3, part of the cooling capacity of the first phase change module 3 is consumed, and both the first phase change module 3 and the cooling module 21 can jointly provide cooling capacity and cool the battery heat exchange plate 1. Among them, the temperature of the first phase change module 3 can be the temperature of the heat exchange medium at the outlet of the first phase change module 3, and the first temperature sensor of the thermal management system detects the temperature of the first phase change module 3.

[0114] It should be noted that when the temperature of the first phase change module 3 is higher than the phase change temperature of the first phase change module 3, the cooling of the first phase change module 3 is completely consumed and cannot provide cooling capacity, and the cooling module 21 can provide cooling capacity and cool the battery heat exchange plate 1.

[0115] As mentioned above, the cooling module 21 can include a compression refrigeration module 5 and a first air-cooling module 19, as Figure 3 and Figure 4 shown, in the first cooling mode, the first target radiator 19a, the first heat exchange channel 521, the first phase change module 3, and the battery heat exchange plate 1 are connected in series in the first circulation loop 01.

[0116] When the first target radiator 19a includes the first radiator 7, in the first cooling mode, the first target radiator 19a, the first heat exchange channel 521, the first phase change module 3, and the battery heat exchange plate 1 are connected in series. It can be understood that: the first radiator 7, the first heat exchange channel 521, the first phase change module 3, and the battery heat exchange plate 1 are connected in series.

[0117] When the first target radiator 19a includes the first heat exchanger 52, in the first cooling mode, the first target radiator 19a, the first heat exchange channel 521, the first phase change module 3, and the battery heat exchange plate 1 are connected in series. It can be understood that: the first heat exchange channel 521, the first phase change module 3, and the battery heat exchange plate 1 are connected in series.

[0118] When the first target radiator 19a includes the first radiator 7 and the first heat exchanger 52, in the first cooling mode, the first target radiator 19a, the first heat exchange channel 521, the first phase change module 3, and the battery heat exchange plate 1 are connected in series. It can be understood that: the first radiator 7, the first heat exchange channel 521, the first phase change module 3, and the battery heat exchange plate 1 are connected in series.

[0119] As Figure 3 shown, when the ambient temperature is low and the battery cells 100 need to be cooled, the thermal management system can be in the first cooling mode, and the compression refrigeration module 5 is not operating. It can be understood that when the ambient temperature is low, there is no need for the compression refrigeration module to work to provide cooling capacity, and the cooling capacity of only the first phase change module can meet the cooling requirements of the battery cells. Among them, the first phase change module 3 can provide cooling capacity to cool the heat exchange medium in the first circulation loop 01; or, both the first phase change module 3 and the first air cooling module 19 can provide cooling capacity to cool the heat exchange medium in the first circulation loop 01. In this way, whether the first air cooling module 19 operates can be selected according to the actual working conditions, improving the flexibility of use of the thermal management system.

[0120] As Figure 4 shown, when the ambient temperature is high and the battery cells 100 need to be cooled, the thermal management system can be in the first cooling mode, and the compression refrigeration module 5 operates. It can be understood that when the ambient temperature is high, it is necessary for the compression refrigeration module to work to provide cooling capacity, and the cooling capacity provided by both the first phase change module and the compression refrigeration module is required to meet the cooling requirements of the battery cells. Among them, both the first phase change module 3 and the compression refrigeration module 5 can provide cooling capacity to cool the heat exchange medium in the first circulation loop 01, or the first phase change module 3, the compression refrigeration module 5, and the first air cooling module 19 can all provide cooling capacity to cool the heat exchange medium in the first circulation loop 01. In this way, whether the first air cooling module 19 operates and whether the compression refrigeration module 5 operates can be selected according to the actual working conditions, improving the flexibility of use of the thermal management system.

[0121] When the cooling module 21 includes the compression refrigeration module 5 and does not include the first air-cooling module 19, in the first cooling mode, the first heat exchange channel 521, the first phase change module 3, and the battery heat exchange plate 1 are connected in series and in the first circulation loop 01.

[0122] When the cooling module 21 includes the first air-cooling module 19 and does not include the compression refrigeration module 5, in the first cooling mode, the first target radiator 19a, the first phase change module 3, and the battery heat exchange plate 1 are connected in series and in the first circulation loop 01.

[0123] In the embodiment of the present application, in the cold storage mode, the cooling module 21 and the first phase change module 3 are connected in series and in the cold storage circulation loop, and the cooling module 21 is in an operating state to enable the first phase change module 3 to store cold.

[0124] As described above, the cooling module 21 may include the compression refrigeration module 5 and the first air-cooling module 19. In the cold storage mode, the first heat exchange channel 521 of the compression refrigeration module 5 may be connected in series with the first phase change module 3 and in the cold storage circulation loop, and the compression refrigeration module 5 is in an operating state to enable the first phase change module 3 to store cold; or, in the cold storage mode, the first target radiator 19a of the first air-cooling module 19 may be connected in series with the first phase change module 3 and in the cold storage circulation loop, and the first target fan 19b is in an operating state to enable the first phase change module 3 to store cold; or, in the cold storage mode, the first heat exchange channel 521, the first target radiator 19a, and the first phase change module 3 are connected in series and in the cold storage circulation loop, and both the compression refrigeration module 5 and the first target fan 19b are in an operating state to enable the first phase change module 3 to store cold.

[0125] In the cold storage mode, when the first air-cooling module 19 is operating, the first phase change module 3 utilizes natural cold, effectively reducing the power consumption of the thermal management system, reducing the use cost of the thermal management system, and further improving the conversion efficiency and operating efficiency of the entire energy storage system. This embodiment is applicable to the situation where the ambient temperature is relatively low and the battery unit 100 needs to be cooled.

[0126] When the cooling module 21 includes the compression refrigeration module 5 and does not include the first air-cooling module 19, in the cold storage mode, the first heat exchange channel 521 and the first phase change module 3 are connected in series and in the cold storage circulation loop.

[0127] When the cooling module 21 includes the first air-cooling module 19 and does not include the compression refrigeration module 5, in the cold storage mode, the first target radiator 19a and the first phase change module 3 are connected in series and in the cold storage circulation loop.

[0128] The thermal management system provided by the embodiment of the present application, in the cold storage mode, the cooling module 21 and the first phase change module 3 are connected in series in the cold storage circulation loop. The cooling module 21 is in an operating state to achieve cold storage of the first phase change module 3. In this way, the first phase change module 3 can recover the low-grade cooling capacity provided by the cooling module 21; in the first cooling mode, the cooling module 21, the first phase change module 3, and the battery heat exchange plate 1 are connected in series in the first circulation loop 01. Then, the first phase change module 3 can release cold to provide cooling capacity, or the first phase change module 3 releases cold and the cooling module 21 operates to provide cooling capacity to cool the heat exchange medium in the first circulation loop 01, thereby cooling the battery heat exchange plate 1 and further cooling the battery unit 100. Therefore, the first phase change module 3 can use the low-grade cooling capacity recovered by itself to cool the battery unit 100, effectively reducing the power consumption of the thermal management system and lowering the usage cost of the thermal management system. Moreover, during the valley electricity period, the thermal management system can be in the cold storage mode; during the peak electricity period, the thermal management system can be in the first cooling mode, which can further reduce the usage cost of the thermal management system.

[0129] Since the power consumption of the thermal management system provided by the present application is reduced, the conversion efficiency and operating efficiency of the entire energy storage system are improved.

[0130] In the thermal management system provided by the present application, the cooling module 21, the first phase change module 3, and the battery heat exchange plate 1 are connected in series in the first circulation loop 01. In this way, in the first cooling mode, by controlling whether the cooling module 21 operates, two ways can be realized: the first phase change module 3 provides cooling capacity, and both the first phase change module 3 and the cooling module 21 provide cooling capacity, which simplifies the structure of the thermal management system and also simplifies the control and use of the thermal management system.

[0131] For the specific structure of the cold storage circulation loop, it is selected according to the actual situation, as long as it is ensured that the cooling module 21 and the first phase change module 3 are connected in series in the cold storage circulation loop.

[0132] In some embodiments, the cold storage circulation loop includes a first circulation loop and a second circulation loop. In the cold storage mode, the first circulation loop and the second circulation loop can exist simultaneously or not simultaneously. To simplify the structure, in the cold storage mode, the first circulation loop and the second circulation loop do not exist simultaneously. That is, the first phase change module 3 either stores cold in the first circulation loop or stores cold in the second circulation loop.

[0133] Such as Figure 3 and Figure 4As shown, in the cold storage mode, the first circulation loop 01 is the cold storage circulation loop. In the cold storage mode and when the first circulation loop 01 is the cold storage circulation loop, the cooling module 21, the first phase change module 3, and the battery heat exchange plate 1 are connected in series and in the first circulation loop 01. Among them, the cooling module 21 operates to cool the heat exchange medium in the first circulation loop 01, and the heat exchange medium in the first circulation loop 01 provides cooling capacity to the first phase change module 3, thereby realizing the cold storage of the first phase change module 3; at the same time, the heat exchange medium in the first circulation loop 01 also cools the battery heat exchange plate 1. Therefore, the first circulation loop 01 is used as the cold storage circulation loop and is applicable to the situation where the battery unit 100 needs to be cooled.

[0134] As described above, in the first cooling mode, the cooling module 21, the first phase change module 3, and the battery heat exchange plate 1 are connected in series and in the first circulation loop 01. Based on this, two modes of the thermal management system can be realized through the first circulation loop 01, which simplifies the structure of the thermal management system and also simplifies the control of the thermal management system.

[0135] As Figure 9 and Figure 10 As shown, in the cold storage mode, the second circulation loop 02 is the cold storage circulation loop. In the cold storage mode and when the second circulation loop 02 is the cold storage circulation loop, the cooling module 21 and the first phase change module 3 are connected in series and in the second circulation loop 02, and the battery heat exchange plate 1 is located outside the second circulation loop 02, and the battery heat exchange plate 1 and the second circulation loop 02 are relatively independent. In this case, the battery heat exchange plate 1 (battery unit) is neither cooled nor heated.

[0136] As Figure 12 As shown, in the cold storage mode, the second circulation loop 02 is the cold storage circulation loop. In this case, the battery heat exchange plate 1 (battery unit) is heated. Of course, in the cold storage mode, when the cooling module 21 and the first phase change module 3 are connected in series and in the second circulation loop 02, the battery heat exchange plate 1 (battery unit) can also be cooled.

[0137] It can be seen from the above that the second circulation loop 02 is the cold storage circulation loop, which reduces the correlation between the cold storage of the first phase change module 3 and the battery heat exchange plate 1 and improves the flexibility of the cold storage of the first phase change module 3.

[0138] In some other embodiments, the cold storage circulation loop is the first circulation loop 01 or the second circulation loop 02. For the description of the first circulation loop 01 and the second circulation loop 02, reference can be made to the foregoing, and details are not described herein again.

[0139] As described above, the cooling module 21 includes the compression refrigeration module 5 and does not include the first air-cooling module 19. In this case, in order to simplify the structure of the thermal management system, the cold storage circulation loop can be the first circulation loop 01. In this way, in the cold storage mode and the first cooling mode, the first heat exchange channel 521, the first phase change module 3, and the battery heat exchange plate 1 are connected in series and in the first circulation loop 01. Through the first circulation loop 01, two modes of the thermal management system can be realized, simplifying the structure of the thermal management system and also simplifying the control of the thermal management system.

[0140] As described above, the cooling module 21 includes the first air-cooling module 19 and does not include the compression refrigeration module 5. In this case, the cold storage circulation loop includes at least one of the first circulation loop 01 and the second circulation loop 02. In this way, it is convenient to form at least one of the first circulation loop 01 and the second circulation loop 02 through the first air-cooling module 19, especially to form the second circulation loop 02 through the first air-cooling module 19.

[0141] In the cold storage mode and when the first circulation loop 01 is the cold storage circulation loop, the first target radiator 19a, the first phase change module 3, and the battery heat exchange plate 1 are connected in series and in the first circulation loop 01; in the cold storage mode and when the second circulation loop 02 is the cold storage circulation loop, the first target radiator 19a is connected in series with the first phase change module 3 and in the second circulation loop 02.

[0142] When the first target radiator 19a includes the first radiator 7 and does not include the first heat exchanger 52, and the first target fan 19b includes the first fan 8, the cold storage circulation loop includes at least one of the first circulation loop 01 and the second circulation loop 02. Exemplarily, the cold storage circulation loop includes the first circulation loop 01 and the second circulation loop 02, or the cold storage circulation loop is the first circulation loop 01, or the cold storage circulation loop is the second circulation loop 02. In the cold storage mode and when the first circulation loop 01 is the cold storage circulation loop, the first radiator 7, the first phase change module 3, and the battery heat exchange plate 1 are connected in series and in the first circulation loop 01; in the cold storage mode and when the second circulation loop 02 is the cold storage circulation loop, the first radiator 7 is connected in series with the first phase change module 3 and in the second circulation loop 02.

[0143] When the first target radiator 19a includes the first heat exchanger 52 and does not include the first radiator 7, and the first target fan 19b includes the second fan 6, the cold storage circulation loop is the first circulation loop 01. In the cold storage mode, the first heat exchange channel 521, the first phase change module 3, and the battery heat exchange plate 1 are connected in series and in the first circulation loop 01.

[0144] When the first target radiator 19a includes the first radiator 7 and the first heat exchanger 52, and the first target fan 19b includes the first fan 8 and the second fan 6, the cold storage circulation loop includes the first circulation loop 01 and the second circulation loop 02, or the cold storage circulation loop is the first circulation loop 01. In the cold storage mode and when the first circulation loop 01 is the cold storage circulation loop, the first radiator 7, the first heat exchange channel 521, the first phase change module 3, and the battery heat exchange plate 1 are connected in series and are in the first circulation loop 01; in the cold storage mode and when the second circulation loop 02 is the cold storage circulation loop, the first radiator 7 is connected in series with the first phase change module 3 and is in the second circulation loop 02.

[0145] As described above, the cooling module 21 includes a compression refrigeration module and the first air cooling module 19. In this case, the cold storage circulation loop is the first circulation loop 01, or the cold storage circulation loop includes the first circulation loop 01 and the second circulation loop 02. In the cold storage mode and when the first circulation loop 01 is the cold storage circulation loop, the first target radiator 19a, the first heat exchange channel 521, the first phase change module 3, and the battery heat exchange plate 1 are connected in series and are in the first circulation loop 01. For the description of this part, reference can be made to the first cooling mode, which will not be elaborated here. In the cold storage mode and when the second circulation loop 02 is the cold storage circulation loop, the first target radiator 19a is connected in series with the first phase change module 3 and is in the second circulation loop 02.

[0146] Regarding the type of the first target radiator 19a, reference can be made to the previous description, which will not be elaborated here.

[0147] In the embodiments of the present application, when the cooling module 21 includes the compression refrigeration module 5, the thermal management system further has a second cooling mode; as Figure 5 shown, in the second cooling mode, the first heat exchange channel 521 and the battery heat exchange plate 1 are connected in series and are in the third circulation loop 03, and the compression refrigeration module 5 is in an operating state to cool the battery heat exchange plate 1.

[0148] It should be noted that in the second cooling mode, the first phase change module 3 is located outside the third circulation loop 03, and the first phase change module 3 and the third circulation loop 03 are relatively independent. When the battery unit 100 needs to be cooled, the thermal management system can be in the second cooling mode. In this way, when the temperature of the first phase change module 3 is greater than the phase change temperature of the first phase change module 3, the cooling of the first phase change module 3 is completely consumed and no cold quantity can be provided. The compression refrigeration module 5 can provide cold quantity and cool the battery heat exchange plate 1, ensuring the thermal management reliability of the thermal management system and also ensuring the normal operation of the battery unit 100.

[0149] When the battery cell 100 needs to be cooled, during the valley electricity period when the ambient temperature is relatively low, the thermal management system can be in the second cooling mode, and the compression refrigeration module 5 operates to provide cooling capacity.

[0150] When the battery cell 100 needs to be cooled, during some periods of the peak electricity period when the ambient temperature is relatively low, the thermal management system can be in the second cooling mode; during some periods of the peak electricity period, the management system can be in the first cooling mode. Alternatively, the thermal management system can be in the first cooling mode during the peak electricity period, and the first phase change module 3 releases cold to provide cooling capacity, or the first phase change module 3 releases cold and the compression refrigeration module 5 operates to provide cooling capacity. In this way, the power consumption of the thermal management system can be further reduced, the usage cost of the thermal management system can be reduced, and the conversion efficiency and operation efficiency of the entire energy storage system can be further improved.

[0151] In the embodiment of the present application, when the cooling module 21 includes the first air-cooling module 19, the thermal management system further has a third cooling mode; as Figure 5 shown, in the third cooling mode, the first target radiator 19a and the battery heat exchange plate 1 are connected in series and in the third circulation loop 03, and the first air-cooling module 19 is in an operating state to cool the battery heat exchange plate 1. In the third air-cooling mode, the compression refrigeration module 5 can operate or not operate, which is selected according to the actual situation. Correspondingly, in the second air-cooling mode, the first air-cooling module 19 can operate or not operate.

[0152] When the first target radiator 19a includes the first radiator 7 and the first heat exchanger 52, for the sake of simplifying the structure, in the third cooling mode, the first heat exchange channel 521 of the first heat exchanger 52 can be connected in series with the battery heat exchange plate 1 and in the third circulation loop 03, and the second fan 6 is in an operating state to cool the battery heat exchange plate 1.

[0153] It should be noted that in the third cooling mode, the first phase change module 3 is located outside the third circulation loop 03, and the first phase change module 3 and the third circulation loop 03 are relatively independent. When the battery cell 100 needs to be cooled, the thermal management system can be in the third cooling mode. In this way, when the temperature of the first phase change module 3 is greater than the phase change temperature of the first phase change module 3, the cooling of the first phase change module 3 is completely consumed and cannot provide cooling capacity, and the first air-cooling module 19 can provide cooling capacity and cool the battery heat exchange plate 1, ensuring the thermal management reliability of the thermal management system and also ensuring the normal operation of the battery cell 100.

[0154] When the battery cell 100 needs to be cooled, during the valley electricity period, the above-mentioned thermal management system can be in the third cooling mode, and the compression refrigeration module 5 operates to provide cooling capacity.

[0155] When the battery cell 100 needs to be cooled, during some time periods of the peak power period, the thermal management system may be in the third cooling mode; during some time periods of the peak power period, the thermal management system may be in the first cooling mode. Alternatively, during the peak power period, the thermal management system is in the first cooling mode, and the first phase change module 3 releases cold to provide cooling capacity, or the first phase change module 3 releases cold and the first air cooling module 19 operates to provide cooling capacity. In this way, the power consumption of the thermal management system can be further reduced, the usage cost of the thermal management system can be reduced, and the conversion efficiency and operation efficiency of the entire energy storage system can be further improved.

[0156] As described above, the thermal management system provided by the embodiments of the present application may have the first circulation loop 01 and the second circulation loop 02, or the thermal management system may have the first circulation loop 01 and the third circulation loop 03, or the thermal management system may have the first circulation loop 01, the second circulation loop 02 and the third circulation loop 03. As Figure 2 shown, in order to facilitate the thermal management system to have the above-mentioned circulation loops, the thermal management system further includes a first pipeline coupling device 10. The first port of the first heat exchange channel 521, the first port of the first radiator 7, the first port of the first phase change module 3 and the first port of the battery heat exchange plate 1 are all connected to the first pipeline coupling device 10; the second port of the first heat exchange channel 521 can communicate with the second port of the battery heat exchange plate 1, and the second port of the first radiator 7 can communicate with the second port of the first phase change module 3.

[0157] Exemplarily, the second port of the first heat exchange channel 521 can communicate with the second port of the battery heat exchange plate 1 through the third four-way valve 11 or other structures mentioned later. The second port of the first radiator 7 can communicate with the second port of the first phase change module 3 through the fourth four-way valve 18 or other structures mentioned later.

[0158] The first pipeline coupling device 10 has a first state and a second state. As Figure 3 and Figure 4 shown, when the first pipeline coupling device 10 is in the first state, the battery heat exchange plate 1, the first phase change module 3, the first radiator 7, and the first heat exchange channel 521 are connected in series and are in the first circulation loop 01. As Figure 5 shown, when the first pipeline coupling device 10 is in the second state, the first phase change module 3 and the first radiator 7 are connected in series and are in the second circulation loop 02, and the battery heat exchange plate 1 and the first heat exchange channel 521 are connected in series and are in the third circulation loop 03.

[0159] Exemplarily, the first pipeline coupling device 10 includes a first four-way valve 10'. The first valve port a of the first four-way valve 10' communicates with the first port of the first heat exchange channel 521. The second valve port b of the first four-way valve 10' communicates with the first port of the first radiator 7. The third valve port c of the first four-way valve 10' communicates with the first port of the first phase change module 3. The fourth valve port d of the first four-way valve 10' communicates with the first port of the battery heat exchange plate 1. The first four-way valve 10' has a first valve position and a second valve position. The first valve position of the first four-way valve 10' corresponds to the first state of the first pipeline coupling device 10, and the second valve position of the first four-way valve 10' corresponds to the second state of the first pipeline coupling device 10.

[0160] When the first four-way valve 10' is in the first valve position, the first valve port a and the second valve port b of the first four-way valve 10' are communicated, and the third valve port c and the fourth valve port d of the first four-way valve 10' are communicated, so that the battery heat exchange plate 1, the first phase change module 3, the first radiator 7 and the first heat exchange channel 521 are connected in series and in the first circulation loop 01. When the first four-way valve 10' is in the second valve position, the first valve port a and the fourth valve port d of the first four-way valve 10' are communicated, and the second valve port b and the third valve port c of the first four-way valve 10' are communicated, so that the battery heat exchange plate 1 and the first heat exchange channel 521 are connected in series and in the third circulation loop 03, and the first phase change module 3 and the first radiator 7 can be connected in series and in the second circulation loop 02. Therefore, by switching the valve position of the first four-way valve 10', the state of the thermal management system can be switched, the structure of the thermal management system is simplified, and the management of the thermal management system is also simplified.

[0161] In actual situations, other valves can also be used to replace the first four-way valve 10'.

[0162] As Figure 2 shown, the thermal management system further includes: a second phase change module 4 and a heating module 22.

[0163] The second phase change module 4 is used for the heat exchange medium to flow through, and it can be understood that: heat exchange is carried out with the heat exchange medium. The second phase change module 4 has a heat storage function and a heat release function. Specifically, the second phase change module 4 includes a phase change material, and the phase change material forms a heat exchange channel for the heat exchange medium to flow through; or, the second phase change module 4 includes a phase change material and a heat exchange channel, and the phase change material and the heat exchange channel can carry out heat exchange.

[0164] The state of the phase change material before heat storage and after heat storage is selected according to the actual situation. Exemplarily, the phase change material can be in a solid state before heat storage and in a liquid state after heat storage; or the phase change material can be in a solid state or a liquid state before heat storage and in a gaseous state after heat storage.

[0165] The phase change temperature of the phase change material in the second phase change module 4 is higher than that of the phase change material in the first phase change module 3, so that the first phase change module 3 can store cold and the second phase change module 4 can store heat.

[0166] The heating module 22 is used for the heat exchange medium to flow through and is used for heat exchange with the heat exchange medium. Specifically, the heating module 22 has a heat exchange channel for the heat exchange medium to flow through. Since the heating module 22 is used for providing heating, the heating module 22 can heat the heat exchange medium.

[0167] In some embodiments, the heating module 22 includes an energy storage converter heat exchange plate 2, an electric heater 15, and a second heat exchanger 55 of the compression refrigeration module 5.

[0168] The energy storage converter heat exchange plate 2 is used for the heat exchange medium to flow through and for heat exchange with the energy storage converter 200. Specifically, the energy storage converter heat exchange plate 2 has a heat exchange channel for the heat exchange medium to flow through, and the energy storage converter heat exchange plate 2 is thermally connected to the energy storage converter 200. For the convenience of the thermal connection between the energy storage converter heat exchange plate 2 and the energy storage converter 200, the energy storage converter heat exchange plate 2 can be located in the converter cabin.

[0169] The electric heater 15 is used for the heat exchange medium to flow through and for heating the heat exchange medium. It can be understood that the electric heater 15 has a heating body and a heat exchange channel for the heat exchange medium to flow through. The heating body can be in the heat exchange channel to achieve direct contact between the heating body and the heat exchange medium; or the heating body forms the heat exchange channel to achieve direct contact between the heating body and the heat exchange medium; or the heating body is located outside the heat exchange channel to achieve indirect contact between the heating body and the heat exchange medium. The embodiments of the present application do not limit the type of the electric heater 15.

[0170] In the compression refrigeration module 5, the second heat exchanger 55 includes a third heat exchange channel 551 and a fourth heat exchange channel 552 capable of heat exchange. The fourth heat exchange channel 552 is used for the refrigerant to flow through, and the third heat exchange channel 551 is used for the heat exchange medium to flow through. When the compression refrigeration module 5 is in an operating state, the heat exchange medium in the third heat exchange channel 551 is heated to increase the temperature of the heat exchange medium in the third heat exchange channel 551.

[0171] In some other embodiments, the heating module 22 may also include any two or any one of the energy storage converter heat exchange plate 2, the electric heater 15, and the second heat exchanger 55.

[0172] Exemplarily, the heating module 22 may include the energy storage converter heat exchange plate 2 and the electric heater 15, or the heating module 22 may include the energy storage converter heat exchange plate 2 and the second heat exchanger 55, or the heating module 22 may further include the electric heater 15 and the second heat exchanger 55, or the heating module 22 may include the energy storage converter heat exchange plate 2, or the heating module 22 may include the electric heater 15, or the heating module 22 may include the second heat exchanger 55.

[0173] In the embodiment of the present application, when the heating module 22 includes the energy storage converter heat exchange plate 2, the heating module 22 reuses the energy storage converter heat exchange plate 2 of the thermal management system itself, simplifies the structure of the thermal management system, and also reduces the cost of the thermal management system.

[0174] In the embodiment of the present application, when the heating module 22 includes the second heat exchanger 55, the heating module 22 reuses the second heat exchanger 55 of the cooling module 21, simplifies the structure of the thermal management system, and also reduces the cost of the thermal management system.

[0175] In the embodiment of the present application, when the heating module 22 includes the electric heater 15, the electric heater 15 can operate when the energy storage converter stops running and the compression refrigeration module 5 stops running, improving the reliability of the heating module 22 and thus improving the reliability of the thermal management system.

[0176] In the embodiment of the present application, the thermal management system has a heat storage mode and a heat release mode.

[0177] As Figures 3 - 5 shown, in the heat storage mode of the thermal management system, the heating module 22 and the second phase change module 4 are connected in series, and in the fourth circulation loop 04, the heating module 22 is in an operating state to enable the second phase change module 4 to store heat. In this way, the second phase change module 4 can use the low-grade heat energy of the energy storage system itself to store heat.

[0178] Exemplarily, when the heating module 22 includes the energy storage converter heat exchange plate 2, the electric heater 15 and the second heat exchanger 55, in the heat storage mode, the energy storage converter heat exchange plate 2, the electric heater 15, the third heat exchange channel 551 and the second phase change module 4 are connected in series, and in the fourth circulation loop 04, at least one of the energy storage converter heat exchange plate 2, the electric heater 15 and the second heat exchanger 55 provides heat.

[0179] In the heat storage mode, in the fourth circulation loop 04, the relative positional relationship of the electric heater 15, the energy storage converter heat exchange plate 2, the second phase change module 4 and the second heat exchanger 55 is selected according to the actual situation, and the embodiment of the present application does not limit this.

[0180] Specifically, as Figures 3 - 5As shown, when the energy storage converter is in operation, the heat exchange plate 2 of the energy storage converter is in an operating state. The heat exchange plate 2 of the energy storage converter provides heat to heat the heat exchange medium in the fourth circulation loop 04, so that the second phase change module 4 stores heat. Since the second phase change module 4 absorbs the heat of the heat exchange plate 2 of the energy storage converter, the heat exchange plate 2 of the energy storage converter is cooled, thereby cooling the energy storage converter. Therefore, in the case where the energy storage converter 200 needs to be cooled, this heat storage mode can be adopted.

[0181] As Figure 9 shown, when the energy storage converter stops operating, the electric heater 15 is in an operating state. The electric heater 15 provides heat to heat the heat exchange medium in the fourth circulation loop 04, so that the second phase change module 4 stores heat.

[0182] As Figure 10 shown, when the energy storage converter stops operating, the second heat exchanger 55 provides heat, or both the second heat exchanger 55 and the electric heater 15 provide heat, to heat the heat exchange medium in the fourth circulation loop 04, so that the second phase change module 4 stores heat.

[0183] During the peak electricity period, in the heat storage mode, the heat exchange plate 2 of the energy storage converter can provide heat. During the valley electricity period, at least one of the compression refrigeration module 5 and the electric heater 15 can provide heat.

[0184] Exemplarily, when the heating module 22 includes two or one of the heat exchange plate 2 of the energy storage converter, the electric heater 15, and the second heat exchanger 55, the corresponding components are selected to provide heat according to the actual situation. For details, please refer to the foregoing.

[0185] When the heating module 22 includes at least two of the heat exchange plate 2 of the energy storage converter, the electric heater 15, and the second heat exchanger 55, in order to simplify the structure of the thermal management system, at least two of the heat exchange plate 2 of the energy storage converter, the electric heater 15, and the second heat exchanger 55 can be connected in series. In this way, by switching the operation of different components, different components can be switched to provide heat, and the control of the thermal management system is also simplified.

[0186] In actual situations, at least two of the heat exchange plate 2 of the energy storage converter, the electric heater 15, and the second heat exchanger 55 can also be connected in parallel. At least two of the heat exchange plate 2 of the energy storage converter, the electric heater 15, and the second heat exchanger 55 are connected in parallel and then connected in series with the second phase change module 4.

[0187] As Figure 11 and Figure 12As shown, in the exothermic mode, the second phase change module 4 and the battery heat exchange plate 1 are connected in series, and in the fifth circulation loop 05, the second phase change module 4 is used for heat release to heat the heat exchange medium in the fifth circulation loop 05. In this way, the battery heat exchange plate 1 can be heated, and thus the battery cells can be heated.

[0188] Therefore, in the above thermal management system, the second phase change module 4 can recover the low-grade heat energy of the heating module 22 to achieve heat storage, and use this low-grade heat energy to heat the battery heat exchange plate 1, thereby heating the battery cells 100. Compared with only using an electric heater for heating, the power consumption of the thermal management system is reduced, and the usage cost of the thermal management system is lowered. In this way, the conversion efficiency and operation efficiency of the entire energy storage system are further improved. When the heating module 22 includes the energy storage converter heat exchange plate 2, the effect of reducing the power consumption of the thermal management system is more obvious.

[0189] It should be noted that in the heat storage mode, the heat exchange medium heats the second phase change module 4; in the exothermic mode, the heat exchange medium heats the battery heat exchange plate 1. Therefore, the heat exchange medium not only has a cooling function but also has a heating function. The heat exchange medium can be a liquid heat exchange medium or a heat exchange medium in other forms, and the embodiments of the present application do not make any limitations in this regard.

[0190] In the embodiments of the present application, in order to facilitate the circulation of the heat exchange medium in the fourth circulation loop 04, a second delivery pump 17 is connected in series in the fourth circulation loop 04. Correspondingly, a delivery pump is also connected in series in the fifth circulation loop 05. To simplify the structure, the fifth circulation loop 05 and the first circulation loop 01 can share part of the pipeline, and the fifth circulation loop 05 and the first circulation loop 01 can share the first delivery pump 9.

[0191] In the embodiments of the present application, the thermal management system further includes a third fan 16. The third fan 16 and the second heat exchanger 55 are correspondingly distributed. The third fan 16 drives air to flow through the second heat exchanger 55 to cool the second heat exchanger 55 and the heat exchange medium inside it.

[0192] As described above, in the heat storage mode, the second phase change module 4, the electric heater 15, the energy storage converter heat exchange plate 2, and the third heat exchange channel 551 are connected in series. In this case, the compression refrigeration module 5 operates, the second heat exchanger 55 provides heat, the energy storage converter heat exchange plate 2 is also heated, and the energy storage converter 200 is heated. When the above third fan 16 operates, the second heat exchanger 55 can be cooled, thereby reducing the amount of heat received by the energy storage converter heat exchange plate 2, and further reducing the influence of the compression refrigeration module 5 on the energy storage converter 200.

[0193] As Figure 2As shown, the thermal management system further includes a second air-cooling module 20, and the second air-cooling module 20 includes a second target radiator 20a and a second target fan 20b. The thermal management system has a fourth cooling mode. In the fourth cooling mode, the second target radiator 20a and the energy storage converter heat exchange plate 2 are connected in series, and in the air-cooling circulation loop, the second air-cooling module 20 is in an operating state. In this way, the second air-cooling module 20 cools the heat exchange medium in the air-cooling circulation loop, thereby cooling the energy storage converter heat exchange plate 2, and further cooling the energy storage converter.

[0194] As described above, in the heat storage mode, when the energy storage converter heat exchange plate 2 serves as the heating module 22, the second phase change module 4 also cools the energy storage converter. Based on this, the second phase change module 4 can cool the energy storage converter 200 first, and the second air-cooling module 20 can cool the energy storage converter 200 later.

[0195] Exemplarily, when the temperature of the second phase change module 4 is lower than the phase change temperature of the second phase change module 4, the second phase change module 4 absorbs heat to cool the energy storage converter heat exchange plate 2; when the temperature of the second phase change module 4 is equal to the phase change temperature of the second phase change module 4, the second phase change module 4 is partially consumed, and the second phase change module 4 absorbs heat and the second air-cooling module 20 provides cold to cool the energy storage converter heat exchange plate 2; when the temperature of the second phase change module 4 is greater than the phase change temperature of the second phase change module 4, the second phase change module 4 cannot absorb heat, and the second air-cooling module 20 provides cold to cool the energy storage converter heat exchange plate 2.

[0196] It should be noted that the temperature of the second phase change module 4 can be the temperature of the heat exchange medium at the outlet of the second phase change module 4, and the second temperature sensor of the thermal management system detects the temperature of the second phase change module 4.

[0197] Exemplarily, during the peak electricity period, the second phase change module 4 cools the energy storage converter 200; during the valley electricity period, the second air-cooling module 20 cools the energy storage converter 200. In this way, the power consumption of the thermal management system is further reduced, the usage cost of the thermal management system is further reduced, and the conversion efficiency and operation efficiency of the entire energy storage system are further improved.

[0198] In some embodiments, as Figure 3 and Figure 6 shown, the air-cooling circulation loop includes a fourth circulation loop and a sixth circulation loop. It should be noted that in the fourth cooling mode, the fourth circulation loop and the sixth circulation loop may exist simultaneously or may not exist simultaneously. To simplify the structure, in the fourth cooling mode, the fourth circulation loop and the sixth circulation loop do not exist simultaneously.

[0199] As Figure 3As shown, in the case of the fourth cooling mode and the fourth circulation loop 04 being an air-cooled circulation loop, the second target radiator 20a, the second phase change module 4, and the heat exchange plate 2 of the energy storage converter are connected in series and are in the fourth circulation loop 04. Moreover, in the heat storage mode, the second target radiator 20a, the second phase change module 4, and the heat exchange plate 2 of the energy storage converter are connected in series and are in the fourth circulation loop 04. In this way, by controlling the operation of different components, the fourth circulation loop 04 can achieve two modes, simplifying the structure of the thermal management system and also simplifying the control of the thermal management system.

[0200] As Figure 6 shown, in the case of the fourth cooling mode and the sixth circulation loop 06 being an air-cooled circulation loop, the second target radiator 20a and the heat exchange plate 2 of the energy storage converter are connected in series and are in the sixth circulation loop 06, the second phase change module 4 is located outside the sixth circulation loop 06, and the second phase change module 4 and the sixth circulation loop 06 are relatively independent. In this way, the correlation between the sixth circulation loop 06 and the second phase change module 4 is reduced. After the second phase change module 4 completes heat storage, the thermal management system can be in the fourth cooling mode to cool the heat exchange plate 2 of the energy storage converter.

[0201] In some other embodiments, the air-cooled circulation loop is the fourth circulation loop 04 or the sixth circulation loop 06. For the description of the fourth circulation loop 04 or the sixth circulation loop 06, reference can be made to the foregoing, and details will not be described here.

[0202] For the structure of the second air-cooled module 20, it is selected according to the actual situation. As Figure 2 shown, in some embodiments, the second target radiator 20a may include a second radiator 12 and a second heat exchanger 55, the second target fan 20b may include a third fan 16 and a fourth fan 13, the second radiator 12 and the fourth fan 13 are used in cooperation, and the second heat exchanger 55 and the third fan 16 are used in cooperation. In this way, different fans can be selected to work according to different needs, improving the flexibility of use of the thermal management system; moreover, the second target radiator 20a reuses the second heat exchanger 55 of the compression refrigeration module 5, simplifying the structure of the thermal management system and reducing the cost of the thermal management system; by providing the second heat exchanger 55 and the third fan 16, it is convenient to form the sixth circulation loop 06 mentioned later.

[0203] It should be noted that both the second radiator 12 and the second heat exchanger 55 are used for the heat exchange medium to flow through. In the second target radiator 20a, the third heat exchange channel 551 of the second heat exchanger 55 serves as the second target radiator 20a.

[0204] Of course, the second target radiator 20a may also only include the second radiator 12, which can be understood as: the second target radiator 20a includes the second radiator 12 and does not include the second heat exchanger 55, and the second target fan 20b includes the fourth fan 13. Alternatively, the second target radiator 20a may only include the second heat exchanger 55, which can be understood as: the second target radiator 20a includes the second heat exchanger 55 and does not include the second radiator 12, and the second target fan 20b includes the third fan 16.

[0205] When the second target radiator 20a only includes the second radiator 12 and the second target fan 20b includes the fourth fan 13, the air-cooled circulation loop can be the fourth circulation loop 04; in the case of the fourth cooling mode and the fourth circulation loop 04 being an air-cooled circulation loop, the second radiator 12, the energy storage converter heat exchange plate 2, and the second phase change module 4 are connected in series and are in the fourth circulation loop 04.

[0206] When the second target radiator 20a only includes the second heat exchanger 55 and the second target fan 20b includes the third fan 16, the air-cooled circulation loop includes at least one of the fourth circulation loop 04 and the sixth circulation loop 06. In the case of the fourth cooling mode and the sixth circulation loop 06 being an air-cooled circulation loop, the third heat exchange channel 551 and the energy storage converter heat exchange plate 2 are connected in series and are in the sixth circulation loop 06; in the case of the fourth cooling mode and the fourth circulation loop 04 being an air-cooled circulation loop, the third heat exchange channel 551, the second phase change module 4, and the energy storage converter heat exchange plate 2 are connected in series and are in the fourth circulation loop 04.

[0207] When the second target radiator 20a includes the second radiator 12 and the second heat exchanger 55, and the second target fan 20b includes the fourth fan 13 and the third fan 16, the air-cooled circulation loop includes the fourth circulation loop 04 and the sixth circulation loop 06, or the air-cooled circulation loop is the fourth circulation loop 04. In the case of the fourth cooling mode and the sixth circulation loop 06 being an air-cooled circulation loop, the third heat exchange channel 551 and the energy storage converter heat exchange plate 2 are connected in series and are in the sixth circulation loop 06; in the case of the fourth cooling mode and the fourth circulation loop 04 being an air-cooled circulation loop, the second radiator 12, the third heat exchange channel 551, the second phase change module 4, and the energy storage converter heat exchange plate 2 are connected in series and are in the fourth circulation loop 04.

[0208] To facilitate the flow of the heat exchange medium in the sixth circulation loop 06, a transfer pump is connected in series in the sixth circulation loop 06. To reduce the vertical beams of the transfer pump, the sixth circulation loop 06 and the fourth circulation loop 04 share the second transfer pump 17.

[0209] As described above, when the second target radiator 20a includes the second radiator 12 and the second heat exchanger 55, and the second target fan 20b includes the third fan 16 and the fourth fan 13, the thermal management system can have a fourth circulation loop 04, a fifth circulation loop 05, and a sixth circulation loop 06. As Figure 2 shown, to facilitate the thermal management system having the above-mentioned circulation loops, the thermal management system further includes a second pipeline coupling device 23. The first port and the second port of the second phase change module 4, the first port of the energy storage converter heat exchange plate 2, and the first port and the second port of the battery heat exchange plate 1 are all connected to the second pipeline coupling device 23. The first port and the second port of the second radiator 12 are both connected to the second pipeline coupling device 23. The first port of the third heat exchange channel 551 is connected to the second pipeline coupling device 23, and the second port of the third heat exchange channel 551 can communicate with the second port of the energy storage converter heat exchange plate 2.

[0210] The second pipeline coupling device 23 has a third state, a fourth state, and a fifth state.

[0211] As Figures 3 - 5 shown, when the second pipeline coupling device 23 is in the third state, the second phase change module 4, the second radiator 12, the third heat exchange channel 551, and the energy storage converter heat exchange plate 2 are connected in series and are in the fourth circulation loop 04. When the heating module 22 includes the electric heater 15, the electric heater 15 is connected in series in the fourth circulation loop 04.

[0212] As Figure 11 and Figure 12 shown, when the second pipeline coupling device 23 is in the fourth state, the second radiator 12, the second phase change module 4, and the battery heat exchange plate 1 are connected in series and are in the fifth circulation loop 05. Among them, as Figure 12 shown, the third heat exchange channel 551 and the energy storage converter heat exchange plate 2 are connected in series and are in the sixth circulation loop 06. When the heating module 22 includes the electric heater 15, the electric heater 15 is connected in series in the sixth circulation loop 06. Or, as Figure 11 shown, the third heat exchange channel 551, the energy storage converter heat exchange plate 2, the first phase change module 3, and the first radiator 7 are connected in series in a circulation loop. When the heating module 22 includes the electric heater 15, the electric heater 15 is connected in series in this circulation loop.

[0213] As Figures 6 - 8 shown, when the second pipeline coupling device 23 is in the fifth state, the second radiator 12 and the second phase change module 4 are connected in series and are in the seventh circulation loop 07, and the third heat exchange channel 551 and the energy storage converter heat exchange plate 2 are connected in series and are in the sixth circulation loop 06. When the heating module 22 includes the electric heater 15, the electric heater 15 is connected in series in the sixth circulation loop 06.

[0214] For the specific structure of the second pipeline coupling device 23, it is selected according to the actual situation. In some embodiments, as Figure 2 shown, the second pipeline coupling device 23 includes a second four-way valve 14 and a third four-way valve 11.

[0215] The first valve port a of the second four-way valve 14 is communicated with the first port of the second phase change module 4, the second valve port b of the second four-way valve 14 is communicated with the first port of the energy storage converter heat exchange plate 2, the third valve port c of the second four-way valve 14 is communicated with the first port of the third heat exchange channel 551, and the fourth valve port d of the second four-way valve 14 is communicated with the first port of the second radiator 12; the first valve port a of the third four-way valve 11 is communicated with the second port of the second phase change module 4, the second valve port b of the third four-way valve 11 is communicated with the second port of the second radiator 12, and the fourth valve port d of the third four-way valve 11 is communicated with the second port of the battery heat exchange plate 1.

[0216] The second four-way valve 14 and the third four-way valve 11 respectively have a third valve position and a fourth valve position.

[0217] In the third valve position, the first valve port a and the second valve port b of the second four-way valve 14 are communicated, and the third valve port c and the fourth valve port d of the second four-way valve 14 are communicated; the first valve port a and the second valve port b of the third four-way valve 11 are communicated, and the third valve port c and the fourth valve port d of the third four-way valve 11 are communicated; in the fourth valve position, the first valve port a and the fourth valve port d of the second four-way valve 14 are communicated, and the second valve port b and the third valve port c of the second four-way valve 14 are communicated; the first valve port a and the fourth valve port d of the third four-way valve 11 are communicated, and the second valve port b and the third valve port c of the third four-way valve 11 are communicated.

[0218] As Figures 3 - 5 shown, when both the second four-way valve 14 and the third four-way valve 11 are in the third valve position, the second pipeline coupling device 23 is in the third state, and the second phase change module 4, the second radiator 12, the third heat exchange channel 551 and the energy storage converter heat exchange plate 2 are connected in series and in the fourth circulation loop 04.

[0219] As Figure 11 and Figure 12 shown, when both the second four-way valve 14 and the third four-way valve 11 are in the fourth valve position, the second phase change module 4, the battery heat exchange plate 1, the first heat exchange channel 521 and the second radiator 12 are connected in series and in the fifth circulation loop 05.

[0220] As Figures 6 - 8 shown, when the second four-way valve 14 is in the fourth valve position and the third four-way valve 11 is in the third valve position, the third heat exchange channel 551 and the energy storage converter heat exchange plate 2 can be connected in series and in the sixth circulation loop 06; the second phase change module 4 and the second radiator 12 are connected in series and in the seventh circulation loop 07.

[0221] In actual situations, the second pipeline coupling device 23 may also include other valves, not limited to the above-mentioned second four-way valve 14 and third four-way valve 11.

[0222] The thermal management system may further include a fourth four-way valve 18. The first valve port a of the fourth four-way valve 18 communicates with the second port of the second heat exchange channel 522. The second valve port b of the fourth four-way valve 18 communicates with the second port of the energy storage converter heat exchange plate 2. The third valve port c of the fourth four-way valve 18 communicates with the second port of the first phase change module 3. The fourth valve port d of the fourth four-way valve 18 communicates with the second port of the first radiator 7. The fourth four-way valve 18 has a fifth valve position and a sixth valve position. In the fifth valve position, the first valve port a and the second valve port b of the fourth four-way valve 18 communicate, and the third valve port c and the fourth valve port d of the fourth four-way valve 18 communicate. In the sixth valve position, the first valve port a and the fourth valve port d of the fourth four-way valve 18 communicate, and the third valve port c and the second valve port b of the fourth four-way valve 18 communicate. In actual situations, the fourth four-way valve 18 may also be replaced by other valves, and the embodiments of the present application do not limit this.

[0223] In the embodiments of the present application, the positions of the second heat exchanger 55 and the second radiator 12 may be interchanged. Specifically, both the first port and the second port of the third heat exchange channel 551 are connected to the second pipeline coupling device 23. The first port of the second radiator 12 is connected to the second pipeline coupling device 23, and the second port of the second radiator 12 can communicate with the second port of the energy storage converter heat exchange plate 2. In the fourth state, the third heat exchange channel 551, the second phase change module 4, and the battery heat exchange plate 1 are connected in series in the fifth circulation loop 05. In the fifth state, the third heat exchange channel 551 and the second phase change module 4 are connected in series in the seventh circulation loop 07, and the second radiator 12 and the energy storage converter heat exchange plate 2 are connected in series in the sixth circulation loop 06. In the case where the second pipeline coupling device 23 includes the second four-way valve 14 and the third four-way valve 11, the positions of the second heat exchanger 55 and the second radiator 12 may be interchanged according to the foregoing description, and details are not described herein again.

[0224] The following describes seven working modes of the thermal management system in combination with the thermal management of the battery unit 100 and the energy storage converter 200.

[0225] The first working mode (the first phase change module 3 operates in the first cooling mode and the heat storage mode)

[0226] As Figure 3 shown, when the ambient temperature is relatively high and the energy storage system is operating, the thermal management system is in the first cooling mode and the heat storage mode.

[0227] In the thermal management system, the first four-way valve 10' is switched to the first valve position, the second four-way valve 14 and the third four-way valve 11 are switched to the third valve position, and the fourth four-way valve 18 is switched to the fifth valve position, so that the battery heat exchange plate 1, the first heat exchange channel 521, the first delivery pump 9, the first radiator 7, and the first phase change module 3 are connected in series and in the first circulation loop 01, and the second phase change module 4, the second radiator 12, the third heat exchange channel 551, the energy storage converter heat exchange plate 2, and the electric heater 15 are connected in series and in the fourth circulation loop 04.

[0228] When the ambient temperature is relatively high and the energy storage system is operating, the first delivery pump 9 and the second delivery pump 17 are turned on. The first phase change module 3 independently dissipates heat from the battery heat exchange plate 1, thereby independently dissipating heat from the battery unit; the second phase change module 4 absorbs the heat of the energy storage converter heat exchange plate 2, that is, absorbs the heat of the energy storage converter.

[0229] When there is a dehumidification requirement in the battery compartment, the second fan 6 is turned on to drive the air in the battery compartment to circulate. Water vapor condenses on the surface of the first heat exchanger 52 to achieve dehumidification. Based on this, the first working mode may also include a dehumidification mode.

[0230] The second working mode (the compression refrigeration module 5 operates in the first cold release mode and the heat storage mode)

[0231] As Figure 4 shown, when the ambient temperature is relatively high and the energy storage system is operating, the thermal management system is in the first cold release mode and the heat storage mode.

[0232] In the second working mode, the valve positions of the first four-way valve 10', the second four-way valve 14, the third four-way valve 11, and the fourth four-way valve 18 are the same as those in the first working mode. The battery heat exchange plate 1, the first heat exchange channel 521, the first delivery pump 9, the first radiator 7, and the first phase change module 3 are connected in series and in the first circulation loop 01, and the second phase change module 4, the second radiator 12, the third heat exchange channel 551, the energy storage converter heat exchange plate 2, and the electric heater 15 are connected in series and in the fourth circulation loop 04.

[0233] When the thermal management system operates in the first working mode, the first phase change module 3 is gradually consumed. When the first phase change module 3 is partially consumed, that is, when the temperature of the first phase change module 3 is equal to the phase change temperature of the first phase change module 3, the compression refrigeration module 5 is required to assist in providing cooling capacity to meet the heat dissipation requirements. The second phase change module 4 absorbs the heat of the energy storage converter heat exchange plate 2, that is, absorbs the heat of the energy storage converter. In this way, the thermal management system operates in the second working mode.

[0234] For the description of the temperature of the first phase change module 3, reference can be made to the previous text and will not be elaborated here.

[0235] When there is a dehumidification requirement in the battery compartment, the second fan 6 is turned on to drive the air in the battery compartment to circulate. Water vapor condenses on the surface of the first heat exchanger 52 to achieve dehumidification. Based on this, the second working mode can also include a dehumidification mode.

[0236] The third working mode (the second cooling mode and the heat storage mode)

[0237] As Figure 5 shown, when the ambient temperature is high and the energy storage system is operating, the thermal management system is in the second cooling mode and the heat storage mode.

[0238] In the third working mode, the valve positions of the second four-way valve 14, the third four-way valve 11, and the fourth four-way valve 18 are the same as those in the first working mode (the second working mode). The first four-way valve 10' is in the second valve position, the first valve port a and the fourth valve port d of the first four-way valve 10' are connected, and the second valve port b and the third valve port c of the first four-way valve 10' are connected. The battery heat exchange plate 1, the first heat exchange channel 521, and the first delivery pump 9 are connected in series in the third circulation loop 03; the second phase change module 4, the second radiator 12, the third heat exchange channel 551, the energy storage converter heat exchange plate 2, and the electric heater 15 are connected in series in the fourth circulation loop 04.

[0239] The thermal management system operates in the second working mode, and the first phase change module 3 is gradually completely consumed. When the first phase change module 3 is completely consumed, that is, when the temperature of the first phase change module 3 is greater than the phase change temperature of the first phase change module 3, the first phase change module 3 cannot provide cooling capacity, and the compression refrigeration module 5 needs to provide cooling capacity to meet the heat dissipation requirements. The second phase change module 4 absorbs the heat of the energy storage converter heat exchange plate 2, that is, absorbs the heat of the energy storage converter. In this way, the thermal management system operates in the third working mode.

[0240] For the description of the temperature of the first phase change module 3, reference can be made to the previous text and will not be elaborated here.

[0241] When there is a dehumidification requirement in the battery compartment, the second fan 6 is turned on to drive the air in the battery compartment to circulate. Water vapor condenses on the surface of the first heat exchanger 52 to achieve dehumidification. Based on this, the third working mode can also include a dehumidification mode.

[0242] When operating during the peak electricity period, the thermal management system can operate in the first working mode, the second working module, and the third working mode in sequence. When operating during the valley electricity period and the energy storage system is not operating, the thermal management system can operate in the cold storage mode. For example, at least one of the compression refrigeration module 5 and the first air cooling module 19 provides cooling capacity.

[0243] The fourth working mode (the first cooling mode and the fourth cooling mode, and the second cooling mode and the fourth cooling mode)

[0244] The thermal management system operates in the first working mode, the second working module, and the third working mode in sequence, and the second phase change module 4 is gradually completely consumed. When the second phase change module 4 is completely consumed, that is, when the temperature of the second phase change module 4 is greater than the phase change temperature of the second phase change module 4, the heat storage of the second phase change module 4 is completed, and the second phase change module 4 cannot continue to absorb heat.

[0245] As Figures 6 - 8 shown, the heat of the energy storage converter needs to be dissipated by natural energy, that is, the thermal management system is in the fourth cooling mode. In this mode, the second four-way valve 14 is in the fourth valve position, the first valve port a and the fourth valve port d of the second four-way valve 14 are connected, and the second valve port b and the third valve port c of the second four-way valve 14 are connected; the third heat exchange channel 551, the energy storage converter heat exchange plate 2, and the electric heater 15 are connected in series in the sixth circulation loop 06.

[0246] In the fourth cooling mode, the third fan 16 is turned on, and the second air cooling module 20 is used to absorb the heat of the energy storage converter heat exchange plate 2 (energy storage converter), thereby cooling the energy storage converter.

[0247] In the thermal management system, as Figure 6 shown, at least one of the first phase change module 3 and the first air cooling module 19 provides cooling capacity; as Figure 7 shown, the compression refrigeration module 5 provides cooling capacity, or the compression refrigeration module 5 provides cooling capacity and the first phase change module 3 provides cooling capacity; as Figure 8 shown, the compression refrigeration module 5 provides cooling capacity.

[0248] The fifth working mode (the third cooling mode and the heat storage mode; the third cooling mode and the fourth cooling mode)

[0249] When the ambient temperature is low and the energy storage system is operating, the energy storage system can be cooled by natural cold. As Figure 3 and Figure 6 shown, the thermal management system operates in the third cooling mode to cool the battery heat exchange plate 1 (battery unit). In this mode, the battery heat exchange plate 1, the first heat exchange channel 521, the first delivery pump 9, the first radiator 7, and the first phase change module 3 are connected in series in the first circulation loop 01.

[0250] In the third cooling mode, at least one of the first fan 8 and the second fan 6 is turned on. When the temperature of the second phase change module 4 is greater than the phase change temperature of the second phase change module 4, natural heat dissipation (the third cooling mode) is selected, as Figure 6 shown; when the temperature of the second phase change module 4 is less than the phase change temperature of the second phase change module 4, the second phase change module 4 absorbs heat (the heat storage mode), as Figure 3 shown.

[0251] Of course, when the temperature of the second phase change module 4 is equal to the phase change temperature of the second phase change module 4, the second phase change module 4 can absorb heat (the thermal management system is in the heat storage mode) and dissipate heat naturally (the thermal management system is in the fourth cooling mode). In this operating mode, at least one of the fourth fan 13 and the third fan 16 operates.

[0252] The sixth operating mode (heat release mode)

[0253] The battery unit has an operating temperature range for safe operation. When the ambient temperature is lower than the lower limit value of the operating temperature range, the battery unit can be charged but cannot be discharged. The battery unit needs to be heated until its temperature is within the operating temperature range before it can be discharged.

[0254] It should be noted that the charging of the battery unit can also be understood as the battery unit being in an operating state, or it can also be understood as: the energy storage system being in an operating state.

[0255] Based on the above, when the ambient temperature is lower than the lower limit value of the operating temperature range and the energy storage system is not operating, the thermal management system is in the heat release mode.

[0256] As Figure 11 and Figure 12 shown, in the heat release mode, the second phase change module 4, the second radiator 12, the first heat exchange channel 521, the first delivery pump 9, and the battery heat exchange plate 1 are connected in series in the fifth circulation loop 05, and the second phase change module 4 can heat the heat exchange medium in the fifth circulation loop 05, thereby heating the battery heat exchange plate 1 and further heating the battery unit.

[0257] As Figure 11 shown, in the heat release mode, the fourth four-way valve 18 can be in the sixth valve position, so that the first phase change module 3, the first radiator 7, the second delivery pump 17, the third heat exchange channel 551, the electric heater 15, and the energy storage converter heat exchange plate 2 are connected in series in the same circulation loop.

[0258] As Figure 12 shown, in the heat release mode, the fourth four-way valve 18 can be in the fifth valve position, so that the first phase change module 3 and the first radiator 7 are connected in series in the second circulation loop 02, and the first air cooling module 19 provides cooling capacity to achieve cold storage of the first phase change module 3; the second delivery pump 17, the third heat exchange channel 551, the electric heater 15, and the energy storage converter heat exchange plate 2 are connected in series in the sixth circulation loop 06.

[0259] The seventh operating mode (heat storage mode)

[0260] As Figure 9As shown, when it is the valley electricity period and the energy storage system is not operating, heat can be provided by the electric heater 15 to achieve heat storage in the second phase change module 4. In this heat storage mode, the second phase change module 4, the second radiator 12, the third heat exchange channel 551, the energy storage converter heat exchange plate 2, and the electric heater 15 are connected in series in the fourth circulation loop 04. In this way, the electric heater 15 can heat the heat exchange medium in the fourth circulation loop 04, thereby heating the second phase change module 4 to achieve heat storage in the second phase change module 4.

[0261] As Figure 10 shown, in the above heat storage mode, the compression refrigeration module 5 operates, and the compression refrigeration module 5 is utilized to assist in providing heat, thereby accelerating the heat storage of the second phase change module 4. Alternatively, the compression refrigeration module 5 operates and the electric heater 15 does not operate.

[0262] In the above heat storage mode, the first four-way valve 10' can be in the first valve position or the second valve position. For the convenience of cold storage in the first phase change module 3, the first four-way valve 10' can be in the second valve position. In this way, the first phase change module 3 and the first radiator 7 are connected in series in the second circulation loop 02, and the first air cooling module 19 is used to provide cold to achieve cold storage in the first phase change module 3. Of course, the first phase change module 3 may not store cold in the above heat storage mode.

[0263] It should be noted that the above seven working modes are exemplary, and the working modules of the thermal management system are not limited to the above seven working modes.

[0264] The thermal management system provided by the above embodiments has the above technical effects. If the above energy storage system includes the above thermal management system, then the above energy storage system also has corresponding technical effects, which will not be elaborated here.

[0265] The technical features mentioned above and the technical features shown separately in the drawings can be arbitrarily combined with each other as long as the combined technical features are not mutually contradictory. All feasible feature combinations are the technical content clearly recorded in this article. Any one of the multiple technical features included in the same statement can be independently applied without necessarily being applied together with other technical features.

[0266] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A thermal management system, characterized in that, Comprising: A battery heat exchange plate (1) for allowing a heat exchange medium to flow therethrough and performing heat exchange with a battery unit (100); A first phase change module (3) having a cold storage function and a cold release function and for allowing a heat exchange medium to flow therethrough; A cooling module (21) for allowing a heat exchange medium to flow therethrough and capable of providing cold quantity; Wherein, the thermal management system has a cold storage mode and a first cooling mode; In the cold storage mode, the cooling module (21) and the first phase change module (3) are connected in series in a cold storage circulation loop, and the cooling module (21) is in an operating state to cause the first phase change module (3) to store cold; In the first cooling mode, the cooling module (21), the first phase change module (3) and the battery heat exchange plate (1) are connected in series in a first circulation loop (01), and the first phase change module (3) is used for releasing cold, or the first phase change module (3) is used for releasing cold and the cooling module (21) operates to cool the heat exchange medium in the first circulation loop (01).

2. The thermal management system according to claim 1, wherein The cold storage circulation loop includes at least one of the first circulation loop (01) and a second circulation loop (02); Wherein, in the cold storage mode, and when the first circulation loop (01) is the cold storage circulation loop, the cooling module (21), the first phase change module (3) and the battery heat exchange plate (1) are connected in series in the first circulation loop (01); In the cold storage mode, and when the second circulation loop (02) is the cold storage circulation loop, the cooling module (21) and the first phase change module (3) are connected in series in the second circulation loop (02), the battery heat exchange plate (1) is located outside the second circulation loop (02), and the battery heat exchange plate (1) and the second circulation loop (02) are relatively independent.

3. The thermal management system according to claim 2, characterized in that, The cooling module (21) includes at least one of a compression refrigeration module (5) and a first air cooling module (19); The compression refrigeration module (5) includes a first heat exchanger (52), the first heat exchanger (52) includes a first heat exchange channel (521) and a second heat exchange channel (522) capable of performing heat exchange, the second heat exchange channel (522) is for allowing a refrigerant to flow therethrough, and the first heat exchange channel (521) is for allowing a heat exchange medium to flow therethrough; when the compression refrigeration module (5) operates, cooling the heat exchange medium in the first heat exchange channel (521); The first air cooling module (19) includes a first target radiator (19a) and a first target fan (19b), the first target radiator (19a) is for allowing a heat exchange medium to flow therethrough; when the first air cooling module (19) operates, cooling the heat exchange medium in the first target radiator (19a).

4. The thermal management system according to claim 3, wherein When the cooling module (21) includes a compression refrigeration module (5), the thermal management system further has a second cooling mode; in the second cooling mode, the first heat exchange channel (521) and the battery heat exchange plate (1) are connected in series and in a third circulation loop (03), and the compression refrigeration module (5) is in an operating state to cool the battery heat exchange plate (1).

5. The thermal management system according to claim 3, characterized in that, When the cooling module (21) includes a first air-cooling module (19), the thermal management system further has a third cooling mode; in the third cooling mode, the first target radiator (19a) and the battery heat exchange plate (1) are connected in series and in a third circulation loop (03), and the first air-cooling module (19) is in an operating state to cool the battery heat exchange plate (1).

6. The thermal management system according to claim 3, wherein the first target radiator (19a) includes a first radiator (7) and / or the first heat exchanger (52), and the first target fan (19b) includes a first fan (8) and / or a second fan (6); wherein, the first radiator (7) is for a heat exchange medium to flow through, the first fan (8) and the first radiator (7) are used in cooperation, and the first heat exchanger (52) and the second fan (6) are used in cooperation.

7. The thermal management system according to any one of claims 3 to 6, wherein when the cooling module (21) only includes the compression refrigeration module (5), the cold storage circulation loop is the first circulation loop (01), and in the cold storage mode and the first cooling mode, the first heat exchange channel (521), the first phase change module (3) and the battery heat exchange plate (1) are connected in series and in the first circulation loop (01).

8. The thermal management system according to any one of claims 3 to 6, wherein when the cooling module (21) only includes the first air-cooling module (19), the cold storage circulation loop includes at least one of the first circulation loop (01) and the second circulation loop (02); in the cold storage mode and when the first circulation loop (01) is the cold storage circulation loop, and in the first cooling mode, the first target radiator (19a), the first phase change module (3) and the battery heat exchange plate (1) are connected in series and in the first circulation loop (01); in the cold storage mode and when the second circulation loop (02) is the cold storage circulation loop, the first target radiator (19a) is connected in series with the first phase change module (3) and in the second circulation loop (02).

9. The thermal management system according to any one of claims 3 to 6, characterized in that, When the cooling module (21) includes the compression refrigeration module (5) and the first air-cooling module (19), the cold storage circulation loop includes the first circulation loop (01) and the third circulation loop (03), or the cold storage circulation loop is the first circulation loop (01); In the cold storage mode and when the first circulation loop (01) is the cold storage circulation loop, as well as in the first cooling mode, the first target radiator (19a), the first heat exchange channel (521), the first phase change module (3) and the battery heat exchange plate (1) are connected in series in the first circulation loop (01); In the cold storage mode and when the second circulation loop (02) is the cold storage circulation loop, the first target radiator (19a) and the first phase change module (3) are connected in series in the second circulation loop (02).

10. The thermal management system according to any one of claims 3 to 6, characterized in that The thermal management system further includes a first pipeline coupling device (10). The first ports of the first heat exchange channel (521), the first radiator (7), the first phase change module (3) and the battery heat exchange plate (1) are all connected to the first pipeline coupling device (10); The second port of the first heat exchange channel (521) can communicate with the second port of the battery heat exchange plate (1), and the second port of the first radiator (7) can communicate with the second port of the first phase change module (3); The first pipeline coupling device (10) has a first state and a second state. In the first state, the battery heat exchange plate (1), the first phase change module (3), the first radiator (7), and the first heat exchange channel (521) are connected in series in the first circulation loop (01); in the second state, the first phase change module (3) and the first radiator (7) are connected in series in the second circulation loop (02), and the battery heat exchange plate (1) and the first heat exchange channel (521) are connected in series in the third circulation loop (03).

11. The thermal management system according to claim 6, characterized in that, The second fan (6) and the first heat exchanger (52) are both arranged in the battery compartment (300) of the battery unit (100); the thermal management system further has a dehumidification mode, and in the dehumidification mode, the second fan (6) is in an operating state.

12. The thermal management system according to any one of claims 1 to 6 and 11, characterized in that, The thermal management system further includes: A second phase change module (4), the second phase change module (4) has a heat storage function and a heat release function, the second phase change module (4) is used for the heat exchange medium to flow through, and the phase change temperature of the phase change material in the second phase change module (4) is higher than the phase change temperature of the phase change material in the first phase change module (3); A heating module (22), the heating module (22) is used for the heat exchange medium to flow through and can provide heat; Wherein, the thermal management system has a heat storage mode and a heat release mode; In the heat storage mode, the heating module (22) and the second phase change module (4) are connected in series in the fourth circulation loop (04), and the heating module (22) is in an operating state to enable the second phase change module (4) to store heat; In the heat release mode, the second phase change module (4) and the battery heat exchange plate (1) are connected in series in the fifth circulation loop (05), and the second phase change module (4) is used to release heat to heat the heat exchange medium in the fifth circulation loop (05).

13. The thermal management system according to claim 12, wherein, The heating module (22) includes at least one of a heat exchanger plate of an energy storage converter (2), an electric heater (15), and a second heat exchanger (55) of a compression refrigeration module (5); The heat exchanger plate of the energy storage converter (2) is used for allowing a heat exchange medium to flow through and perform heat exchange with the energy storage converter (200); when the heat exchanger plate of the energy storage converter (2) is in an operating state, heating the heat exchange medium in the fourth circulation loop (04) so that the second phase change module (4) stores heat; The second heat exchanger (55) includes: a third heat exchange channel (551) and a fourth heat exchange channel (552) capable of performing heat exchange, the fourth heat exchange channel (552) is used for allowing a refrigerant to flow through, and the third heat exchange channel (551) is used for allowing a heat exchange medium to flow through; when the compression refrigeration module (5) is in an operating state, heating the heat exchange medium in the third heat exchange channel (551) so that the second phase change module (4) stores heat; The electric heater (15) is used for allowing a heat exchange medium to flow through; when the electric heater (15) is in an operating state, heating the heat exchange medium in the fourth circulation loop (04) so that the second phase change module (4) stores heat.

14. The thermal management system according to claim 13, wherein When the heating module (22) includes at least two of a heat exchanger plate of an energy storage converter (2), an electric heater (15), and a second heat exchanger (55) of a compression refrigeration module (5), in the heat storage mode, the at least two are arranged in series.

15. The thermal management system according to claim 13, wherein The thermal management system further includes a third fan (16), and the third fan (16) and the second heat exchanger (55) are correspondingly distributed.

16. The thermal management system according to claim 13, wherein The thermal management system further includes a second air cooling module (20), and the second air cooling module (20) includes a second target radiator (20a) and a second target fan (20b); The thermal management system has a fourth cooling mode, and in the fourth cooling mode, the second target radiator (20a) and the heat exchanger plate of the energy storage converter (2) are connected in series in an air cooling circulation loop, and the second air cooling module (20) is in an operating state.

17. The thermal management system according to claim 16, wherein The second target radiator (20a) includes at least one of a second radiator (12) and a second heat exchanger (55), the second target fan (20b) includes at least one of a third fan (16) and a fourth fan (13), the second radiator (12) and the fourth fan (13) are used in cooperation, and the second heat exchanger (55) and the third fan (16) are used in cooperation.

18. The thermal management system according to claim 16, wherein The air cooling circulation loop includes at least one of the fourth circulation loop (04) and the sixth circulation loop (06); In the fourth cooling mode and when the fourth circulation loop (04) is the air cooling circulation loop, and in the heat storage mode, the second target radiator (20a), the second phase change module (4), and the heat exchanger plate of the energy storage converter (2) are connected in series in the fourth circulation loop (04); In the case where the fourth cooling mode is adopted and the sixth circulation loop (06) is the air-cooled circulation loop, the second target radiator (20a) and the energy storage converter heat exchange plate (2) are connected in series in the sixth circulation loop (06), the second phase change module (4) is located outside the sixth circulation loop (06), and the second phase change module (4) and the sixth circulation loop (06) are relatively independent.

19. The thermal management system according to claim 18, wherein the second target radiator (20a) includes a second radiator (12) and a second heat exchanger (55), the second target fan (20b) includes a third fan (16) and a fourth fan (13), the second radiator (12) and the fourth fan (13) are used in cooperation, and the second heat exchanger (55) and the third fan (16) are used in cooperation; the thermal management system further includes a second pipeline coupling device (23), and the first port and the second port of the second phase change module (4), the first port of the energy storage converter heat exchange plate (2), and the first port and the second port of the battery heat exchange plate (1) are all connected to the second pipeline coupling device (23); In the third heat exchange channel (551) of the second radiator (12) and the second heat exchanger (55), the first port and the second port of the first one are both connected to the second pipeline coupling device (23), the first port of the second one is connected to the second pipeline coupling device (23), and the second port of the second one can communicate with the second port of the energy storage converter heat exchange plate (2); the second pipeline coupling device (23) has a third state, a fourth state, and a fifth state; In the third state, the second phase change module (4), the second radiator (12), the third heat exchange channel (551), and the energy storage converter heat exchange plate (2) are connected in series in the fourth circulation loop (04); In the fourth state, the first one, the second phase change module (4), and the battery heat exchange plate (1) are connected in series in the fifth circulation loop (05); In the fifth state, in the third heat exchange channel (551) of the second radiator (12) and the second heat exchanger (55), the first one and the second phase change module (4) are connected in series in the seventh circulation loop (07), and the second one and the energy storage converter heat exchange plate (2) are connected in series in the sixth circulation loop (06).

20. A energy storage system, characterized in that, Comprising: a battery unit (100), an energy storage converter (200), and a thermal management system according to any one of claims 1 to 19.

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