Cooling device and thermal management system

Abstract

The invention discloses a cooling device and a thermal management system, and belongs to the technical field of energy storage equipment, and the cooling device comprises a first cooling assembly which comprises a first port and a second port; the first heat dissipation assembly comprises a third port and a fourth port; the first flow path assembly is communicated with the first port and the third port, and the first flow path assembly comprises a first control valve and a first compression mechanism; the second cooling assembly is communicated with the first compression mechanism and a passage between the first control valve and the third port through a pipeline; the second flow path assembly is communicated with the second port and the fourth port; unified heat management of the battery pack and the energy storage converter is achieved, the integration level of the whole structure can be improved, parts needed for forming a pipeline system are reduced, a heat management system can be simplified, and the occupied space needed by a cooling device can be saved.

Description

Technical Field

[0001] The present application belongs to the technical field of energy storage equipment, and specifically relates to a cooling device and a thermal management system. Background Art

[0002] In the AC storage era, it is necessary not only to manage the thermal performance of the battery system in the energy storage cabinet, but also to consider the thermal management of the energy storage converter system (PCS). The battery system and energy storage converter in the conventional energy storage cabinet use their own independent thermal management systems, which require relatively more space resources. Summary of the invention

[0003] Purpose of the invention: An embodiment of the present application provides a cooling device, which aims to solve the technical problem that the battery system and energy storage inverter system in the current energy storage cabinet use their own independent thermal management systems, which require relatively more space resources; another purpose of the present application is to provide a thermal management system.

[0004] Technical solution: The cooling device described in the embodiment of the present application includes:

[0005] a first cooling assembly, the first cooling assembly comprising a first port and a second port;

[0006] A first heat dissipation component, comprising a third port and a fourth port;

[0007] a first flow path assembly, connected to the first port and the third port, the first flow path assembly comprising a first control valve and a first compression mechanism, the first control valve being used to connect or disconnect a passage between the first compression mechanism and the third port, and a passage between the first compression mechanism and the first port;

[0008] a second cooling assembly, the second cooling assembly being in communication with the first compression mechanism and a passage between the first control valve and the third port through a pipeline;

[0009] The second flow path component is connected with the second port and the fourth port.

[0010] In some embodiments, the cooling device further includes an intercooler, wherein the intercooler includes a first cooling port and a second cooling port, and the first cooling port and the second cooling port are connected in series to the second flow path component.

[0011] In some embodiments, the first flow path component further includes a second compression mechanism, and the first compression mechanism is connected to the second compression mechanism.

[0012] In some embodiments, the second flow path component includes a first expansion valve, and the first expansion valve is connected to the intercooler through the second cooling port.

[0013] In some embodiments, the intercooler further comprises a coil and a third cooling port, the inlet end of the coil is connected to the first cooling port, and the outlet end of the coil is connected to the second cooling port;

[0014] The cooling device further comprises a second control valve, a liquid distributor and a second expansion valve, wherein the second control valve comprises a plurality of interfaces, each of which is connected to the fourth port, the inlet end of the liquid distributor, the second port and the second cooling port, and is used to connect or disconnect the passage between the intercooler and the fourth port and the second port;

[0015] The first outlet end of the liquid separator is connected to the first cooling port, the second outlet end of the liquid separator is connected to the inlet end of the second expansion valve, and the outlet end of the second expansion valve is connected to the third cooling port.

[0016] In some embodiments, the intercooler has a fourth cooling port, a fifth cooling port, a sixth cooling port, and an input cooling port;

[0017] The input cooling port is connected to the first compression mechanism, the fourth cooling port is connected to the first control valve, the inlet end of the second cooling component is connected to the fifth cooling port, and the outlet end of the second cooling component is connected to the sixth cooling port and the passage between the third port and the first control valve.

[0018] In some embodiments, the cooling device further includes a second compression mechanism, and the second compression mechanism is respectively connected to the first control valve and the fourth cooling port through pipelines.

[0019] In some embodiments, the cooling device further comprises a second heat dissipation component (35), and the second heat dissipation component (35) is connected in series with the first compression mechanism.

[0020] In some embodiments, the cooling device further comprises a first valve, a second valve, and a third valve;

[0021] The first valve includes a plurality of valve ports, each of which is used to connect the passage between the fifth cooling port, the inlet end of the second cooling assembly or the third port and the first control valve, and the first valve is used to connect or disconnect the passage between the intercooler and the inlet end of the second cooling assembly;

[0022] The second valve includes a plurality of valve ports, each valve port of the second valve is used to connect the sixth cooling port, the outlet end of the second cooling assembly or the passage between the third port and the first control valve, and the second valve is used to connect or disconnect the passage between the intercooler and the outlet end of the second cooling assembly, and the passage between the outlet end of the second cooling assembly and the third port; or, to connect or disconnect the passage between the outlet end of the second cooling assembly and the first control valve;

[0023] The third valve includes a plurality of valve ports, each valve port of the third valve is used to connect the fourth port, the second control valve or the passage between the third port and the first control valve, and the third valve is used to connect or disconnect the passage between the second control valve and the fourth port, or to cooperate with the first valve to connect or disconnect the passage between the second control valve and the inlet end of the second cooling component.

[0024] In some embodiments, the cooling device further comprises a third control valve and a fourth valve;

[0025] The third control valve comprises a plurality of valve ports, each of which is used to connect a passage between the fifth cooling port, the sixth cooling port, the second cooling assembly or the third port and the first control valve;

[0026] The fourth valve is connected between the fourth port and the second control valve, and is connected to the passage between the third port and the first control valve through a pipeline. The fourth valve is used to connect or disconnect the passage between the second control valve and the fourth port, or to cooperate with the third control valve to jointly connect or disconnect the passage between the second control valve and the inlet end of the second cooling component.

[0027] In some embodiments, the cooling device further comprises a subcooler, wherein the subcooler is connected in series to a passage between the fourth port and the second port.

[0028] Accordingly, a thermal management system described in an embodiment of the present application includes: the above-mentioned cooling device, and the thermal management system includes at least one of the following modes:

[0029] Low power mode: the outlet of the first compression mechanism is connected to the inlet of the second cooling assembly, the outlet of the second cooling assembly is connected to the third port, and the first port is connected to the inlet of the first compression mechanism through the first control valve;

[0030] Medium and low temperature mode: the outlet end of the first compression mechanism is connected to the inlet end of the second cooling assembly, the outlet end of the second cooling assembly is connected to the third port, the fourth port is connected to the second port through the intercooler, and the first port is connected to the inlet end of the first compression mechanism through the first control valve;

[0031] High temperature mode: the outlet end of the first compression mechanism is connected to the inlet end of the second compression mechanism via the input cooling port and the fourth cooling port, the outlet end of the second compression mechanism is connected to the third port via the first control valve, the fourth port is connected to the second port via the second control valve and the coil, and the first port is connected to the inlet end of the first compression mechanism via the first control valve;

[0032] Heating mode: the outlet of the first compression mechanism is connected to the inlet of the second compression mechanism via the input cooling port and the fourth cooling port, the outlet of the second compression mechanism is connected to the first port via the first control valve, the second port is connected to the fourth port via the second control valve and the coil, and the third port is connected to the inlet of the first compression mechanism via the first control valve;

[0033] Heat recovery mode: the outlet end of the first compression mechanism is connected to the inlet end of the second compression mechanism via the input cooling port and the fourth cooling port, the outlet end of the second compression mechanism is connected to the first port via the first control valve, the second port is connected to the inlet end of the second cooling component via the second control valve, the coil, the third valve and the first valve, and the outlet end of the second cooling component is connected to the inlet end of the first compression mechanism via the second valve and the first control valve.

[0034] Beneficial effect: The cooling device of the embodiment of the present application drives the refrigerant to circulate among the first compressor, the second cooling component, the first heat dissipation component and the first cooling component through the first compression mechanism, and relies on the phase change generated when the refrigerant passes through the first cooling component and the second cooling component during the circulation process to perform heat exchange, thereby realizing cooling of the battery pack and the energy storage inverter, and realizing unified thermal management of the battery pack and the energy storage inverter, so that the integration of the overall structure can be improved, and the components required to form the piping system are reduced, which is beneficial to simplifying the thermal management system and saving the space required for the cooling device; in addition, the refrigerant is used to directly exchange heat with the battery pack and the energy storage inverter, which is beneficial to improving the heat exchange efficiency between them.

[0035] The thermal management system of the embodiment of the present application includes the above-mentioned cooling device, and thus can have all the technical features and beneficial effects of the above-mentioned cooling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 A schematic diagram of a cooling device provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of a first expansion valve provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of a second expansion valve provided in an embodiment of the present application;

[0040] Figure 4 A schematic diagram of a refrigerant heating flow path provided in an embodiment of the present application;

[0041] Figure 5 A schematic diagram of a second heat dissipation assembly provided in an embodiment of the present application;

[0042] Figure 6 A schematic diagram of a first valve, a second valve and a third valve provided in an embodiment of the present application;

[0043] Figure 7 A schematic diagram of another heating flow path of the refrigerant provided in an embodiment of the present application;

[0044] Figure 8 A schematic diagram of a third control valve and a fourth valve provided in an embodiment of the present application;

[0045] Fig. 9 A schematic diagram of another refrigeration flow path of the refrigerant provided in an embodiment of the present application;

[0046] Fig.10 A schematic diagram of another refrigeration flow path of the refrigerant provided in an embodiment of the present application;

[0047] Fig.11 A schematic diagram of another heating flow path of the refrigerant provided in an embodiment of the present application;

[0048] Fig.12 A schematic diagram of a subcooler provided in an embodiment of the present application;

[0049] Fig.13 Another schematic diagram of a subcooler flow path provided in an embodiment of the present application;

[0050] Fig.14 A schematic diagram of an intercooler provided in an embodiment of the present application;

[0051] Figure numerals: 1, first cooling assembly; 11, first port; 12, second port; 2, first heat dissipation assembly; 21, third port; 22, fourth port; 3, first flow path assembly; 31, first control valve; 32, first compression mechanism; 321, first compressor; 322, first gas-liquid separator; 33, second cooling assembly; 34, second compression mechanism; 341, second compressor; 342, second gas-liquid separator; 35, second heat dissipation assembly; 4, second flow path assembly; 41, first expansion valve; 42, second control valve; 421, first interface; 422, second interface; 423, third interface; 424, fourth interface; 5. Intercooler; 501. First cooling port; 502. Second cooling port; 503. Third cooling port; 504. Fourth cooling port; 505. Fifth cooling port; 506. Sixth cooling port; 507. Input cooling port; 51. Coil; 6. Liquid distributor; 61. Second expansion valve; 7. First valve; 8. Second valve; 9. Third valve; 100. Third control valve; 1001. First flow port; 1002. Second flow port; 1003. Third flow port; 1004. Fourth flow port; 1005. Fifth flow port; 1006. Sixth flow port; 200. Fourth valve; 300. Subcooler; 400. Third heat dissipation component. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0053] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "height", "thickness", "up", "down", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "multiple" is two or more, and at least one means that it can be one, two or more than two, unless otherwise clearly and specifically defined. In the embodiment of the present application, "able to be connected" means that two components can be directly connected, or indirectly connected, or in another state, they are in the form of being disconnected or connected to another component. For example, A can be connected to B, which means that A is connected to B; or, A is connected to C, and C is connected to B.

[0054] Please combine Figure 1 and Figure 2The cooling device of the embodiment of the present application connects various components through pipelines to form a closed pipeline circulation system. Refrigerant flows in the pipeline, and the phase change of the refrigerant is used to achieve heat exchange with the battery pack and the energy storage converter. The cooling device includes a first cooling component 1, a first heat dissipation component 2, a first flow path component 3, a second cooling component 33 and a second flow path component 4. The first cooling component 1 is used to cool the battery. The first cooling component 1 includes a first port 11 and a second port 12 for circulating the refrigerant.

[0055] The first heat dissipation component 2 includes a third port 21 and a fourth port 22 for allowing the refrigerant to flow and for transferring heat to the refrigerant.

[0056] The first flow path component 3 connects the first port 11 and the third port 21. The first flow path component 3 includes a first control valve 31 and a first compression mechanism 32. The first control valve 31 is used to connect or disconnect the passage between the first compression mechanism 32 and the third port 21, and the passage between the first compression mechanism 32 and the first port 11.

[0057] The second cooling component 33 is used to cool the energy storage inverter. The second cooling component 33 is connected to the first compression mechanism 32 and the passage between the first control valve 31 and the third port 21 through pipelines, so that the inlet end of the second cooling component 33 can be connected to the outlet end of the first compression mechanism 32, and the outlet end of the second cooling component 33 can be connected to the third port 21.

[0058] The second flow path member 4 communicates with the second port 12 and the fourth port 22 .

[0059] During cooling, the refrigerant enters the first heat dissipation component 2 from the third port 21 driven by the first compression mechanism 32, and exchanges heat with the low-temperature environment, so that the temperature of the refrigerant is reduced. The cooled refrigerant enters the first cooling component 1 through the fourth port 22 and the second port 12, absorbs the heat generated by the battery pack during charging and discharging, and then enters the first compression mechanism 32 through the first port 11. The first compression mechanism 32 drives the refrigerant to enter the second cooling component 33 to absorb the heat generated by the energy storage inverter, and then enters the first heat dissipation component 2, and the cycle repeats. In this cycle, the cooling of the battery pack and the energy storage inverter is achieved, the cooling effect generated by the same cooling device is fully utilized, and the space resources required for the cooling device are saved.

[0060] Please combine Figure 1 , Figure 2 and Fig.14In some embodiments, the cooling device further includes an intercooler 5, which has a receiving cavity inside, and liquid refrigerant is stored in the receiving cavity, and the temperature of the refrigerant is 30°C-35°C. The intercooler 5 includes a first cooling port 501 and a second cooling port 502, and the first cooling port 501 and the second cooling port 502 are connected in series to the second flow path component 4, that is, the intercooler 5 can be connected to the fourth port 22 and the second port 12. During cooling, the refrigerant output from the fourth port 22 enters the intercooler 5 and is then transported to the first cooling component 1. The temperature of the refrigerant in the intercooler 5 is lower than the temperature of the refrigerant output from the fourth port 22. After the two refrigerants are heat exchanged, most of the refrigerant entering the first cooling component 1 is heat exchanged in the phase change zone, which is beneficial to the temperature uniformity of the battery cell.

[0061] The outlet end of the first compression mechanism 32 can be connected to the inlet end of the second cooling component 33 through the intercooler 5, or can directly pass through the intercooler 5 without being connected to the inlet end of the second cooling component 33, thereby increasing the flow path of the refrigerant to meet the application requirements of the cooling device under different working conditions and different flow path configurations.

[0062] Please refer to Figure 3 In some embodiments, the first flow path component 3 also includes a second compression mechanism 34, and the first compression mechanism 32 and the second compression mechanism 34 are connected. Specifically, the outlet end of the first compression mechanism 32 is connected to the intercooler 5, and the inlet end of the second compression mechanism 34 is connected to the intercooler 5. The outlet end of the second compression mechanism 34 is connected to the first control valve 31. At this time, the first compression mechanism 32 is connected in series with the second compression mechanism 34 through the intercooler 5. The first control valve 31 is configured to be able to connect the third port 21 and the outlet end of the second compression mechanism 34 when the first port 11 and the inlet end of the first compression mechanism 32 are connected.

[0063] During high-temperature refrigeration, the first compression mechanism 32 sucks in gaseous refrigerant for compression. The compressed medium-temperature gaseous refrigerant enters the intercooler 5 to exchange heat with the liquid refrigerant. The cooled gaseous refrigerant enters the second compression mechanism 34 and is compressed into a high-temperature and high-pressure gaseous refrigerant. It then enters the first heat dissipation component 2 and condenses into a liquid refrigerant. The liquid refrigerant passes through the first cooling component 1 and the second cooling component 33 in sequence, and evaporates to absorb the heat of the battery pack and the energy storage inverter, forming a gaseous refrigerant that returns to the first compression mechanism 32 for recirculation. During the circulation process, in order to simultaneously cool the energy storage inverter, the intercooler 5 can be connected to the second cooling component 33, so that the liquid refrigerant in the intercooler 5 enters the second cooling component 33 to cool the energy storage inverter, and then flows back to the intercooler 5 to form a cooling cycle. The intercooler 5 reduces the intake temperature and intake pressure of the second compression mechanism 34, so that the exhaust temperature and exhaust pressure of the second compression mechanism 34 are reduced, which can reduce the temperature difference between the gaseous refrigerant and the surrounding environment after entering the first heat dissipation component 2, shorten the heat dissipation time of the refrigerant, and reduce the workload of the second compression mechanism 34. The second compression mechanism 34 is used in conjunction with the first compression mechanism 32 to perform secondary pressurization on the refrigerant, so that the refrigerant can reach the required temperature difference when entering the first heat dissipation component 2 and exchanging heat with the external environment, meet different cooling requirements, and at the same time improve the energy efficiency of the second compression mechanism 34.

[0064] The first control valve 31 is also configured to be able to connect the outlet end of the second compression mechanism 34 and the first port 11 when the third port 21 and the inlet end of the first compression mechanism 32 are connected. The intercooler 5 is connected to the outlet end of the first compression mechanism 32 and the inlet end of the second compression mechanism 34 respectively. Under low temperature conditions, the refrigerant passes through the first compression mechanism 32, the intercooler 5, and the second compression mechanism 34 in sequence to enter the first cooling assembly 1 to heat the battery pack, and then enters the first heat dissipation assembly 2 to absorb the heat of the external environment and evaporate, and finally returns to the first compression mechanism 32 to realize circulation. The heating of the battery pack is achieved by changing the circulation path of the refrigerant, which increases the versatility of the cooling device. In some other embodiments, heating can also be directly performed through the first compression mechanism 32, that is, the outlet end of the first compression mechanism 32 is connected to the inlet end of the first cooling assembly through the first control valve 31.

[0065] In some other embodiments, the first compression mechanism 32 and the second compression mechanism 34 may be directly connected in series, and the refrigerant output by the first compression mechanism 32 may be directly pressurized by the second compression mechanism 34, and the intercooler 5 may be used to exchange heat with the refrigerant output by the first heat dissipation component 2 or the second heat dissipation component 35. Alternatively, the first compression mechanism 32, the second cooling component 33 and the second compression mechanism 34 may be connected in sequence, and the second cooling component 33 may be used as a channel for connecting the first compression mechanism 32 and the second compression mechanism 34 in series.

[0066] Please combine Figures 2 to 4 In some embodiments, the second flow path component 4 includes a first expansion valve 41, and the first expansion valve 41 is connected to the intercooler 5 through the second cooling port 502. The refrigerant entering the intercooler 5 from the first cooling port 501 is output from the second cooling port 502 after heat exchange, and then output after throttling and pressure reduction by the first expansion valve 41, so that the temperature and pressure of the liquid refrigerant can be reduced, and the ability to absorb heat from the outside can be improved.

[0067] During low- to medium-temperature cooling, the liquid refrigerant condensed by the first heat dissipation component 2 passes through the first expansion valve 41, so that the liquid refrigerant is throttled and depressurized to reach the evaporation temperature required by the battery pack, so that the refrigerant can evaporate and absorb heat faster, thereby improving the cooling effect. During heating, the liquid refrigerant formed after heat exchange passes through the first expansion valve 41 to be throttled to a liquid refrigerant with a low evaporation temperature, so that the refrigerant can quickly absorb external heat and transform into a gaseous state during the process of passing through the first heat dissipation component 2.

[0068] Please combine Figures 2 to 4 as well as Fig.14 In some embodiments, the intercooler 5 further includes a coil 51 and a third cooling port 503 , the inlet end of the coil 51 is connected to the first cooling port 501 , and the outlet end of the coil 51 is connected to the second cooling port 502 .

[0069] The cooling device also includes a second control valve 42, a liquid separator 6 and a second expansion valve 61. The second control valve 42 includes multiple interfaces, each of which is connected to the fourth port 22, the inlet end of the liquid separator, the second port 12 and the second cooling port 502, and is used to connect or disconnect the passage between the intermediate cooler 5 and the fourth port 22 and the second port 12.

[0070] For the convenience of distinction, the various interfaces of the second control valve 42 are recorded as the first interface 421, the second interface 422, the third interface 423 and the fourth interface 424. The first interface 421 is connected to the inlet end of the liquid separator 6, the second interface 422 is connected to the outlet end of the first expansion valve 41, the third interface 423 is connected to the fourth port 22, and the fourth interface 424 is connected to the second port 12.

[0071] The first outlet end of the liquid separator 6 is connected to the first cooling port 501 , the second outlet end of the liquid separator 6 is connected to the inlet end of the second expansion valve 61 , and the outlet end of the second expansion valve 61 is connected to the third cooling port 503 .

[0072] During cooling, the third interface 423 of the second control valve 42 is connected to the first interface 421, and the refrigerant output from the fourth port 22 is divided into two paths through the liquid separator 6, one of which enters the coil 51, and flows to the first expansion valve 41 after heat exchange output from the coil 51. The refrigerant is throttled and reduced in pressure by the first expansion valve 41, and then enters the first cooling component 1 through the second port 12. The other path is throttled into a liquid refrigerant with an intermediate evaporation temperature through the second expansion valve 61, forming a liquid refrigerant in the intermediate cooler 5. On the one hand, this part of the liquid refrigerant can be used to exchange heat with the refrigerant in the coil 51 to increase the supercooling of the refrigerant before entering the first expansion valve 41. On the other hand, it can be used to cool the gaseous refrigerant discharged from the first compression mechanism 32, and can also be used for circulating heat exchange in the second cooling component 33.

[0073] The coil 51 provides a flow path for the refrigerant that needs to exchange heat with the liquid refrigerant in the intercooler 5, so that this part of the refrigerant can be isolated from the liquid refrigerant in the intercooler 5. The second control valve 42 can change the refrigerant path by connecting different interfaces, so that the refrigerant can enter the first expansion valve 41 from the fourth port 22 or the second port 12, which facilitates the adjustment of the cooling device.

[0074] Please combine Figures 2 to 4 In some embodiments, the first compression mechanism 32 includes a first compressor 321 and a first gas-liquid separator 322. The outlet of the first gas-liquid separator 322 is connected to the inlet of the first compressor 321 and communicated with the inlet of the first compression mechanism 32, that is, the inlet of the first compressor 321 is communicated through the first gas-liquid separator 322. The main function of the first gas-liquid separator 322 is to separate the mixed gas and liquid to prevent the liquid refrigerant from entering the first compressor 321 and avoid damage to the first compressor 321. The second compression mechanism 34 includes a second compressor 341 and a second gas-liquid separator 342. The outlet of the second gas-liquid separator 342 is connected to the inlet of the second compressor 341 and communicated with the inlet of the second compression mechanism 34, that is, the inlet of the second compressor 341 is communicated through the second gas-liquid separator 342. The function of the second gas-liquid separator 342 is the same as that of the first gas-liquid separator 322, which will not be repeated here.

[0075] Please combine Figure 1 , Figure 3 , Figure 4 and Fig.14In some embodiments, the intercooler 5 has a fourth cooling port 504, a fifth cooling port 505, a sixth cooling port 506 coil and an input cooling port 507. The input cooling port 507 is connected to the first compression mechanism 32, the fourth cooling port 504 is connected to the first control valve 31, the inlet end of the second cooling assembly 33 is connected to the fifth cooling port 505, and the outlet end of the second cooling assembly 33 is connected to the sixth cooling port 506 and the passage between the third port 21 and the first control valve 31. At this time, the input cooling port 507 and the second cooling assembly 33 are each connected to the intake end of the first compression mechanism 32 through a pipeline.

[0076] During refrigeration, the gaseous refrigerant pressurized by the first compression mechanism 32 enters the intercooler 5 through the input cooling port 507 for heat exchange, and the liquid refrigerant in the intercooler 5 cools down the exhaust gas of the first compression mechanism 32. The cooled and depressurized refrigerant enters the first heat dissipation assembly 2 through the first control valve 31 and the third port 21 for further heat dissipation. The heat-dissipated refrigerant enters the liquid separator 6 through the second control valve 42. The liquid separator 6 divides the refrigerant into two streams, one of which enters the second heat dissipation assembly 35 through the coil 51 and the first expansion valve 41 in sequence, and the other enters the intercooler 5 through the second expansion valve 61 and the third cooling port 503. Part of the liquid refrigerant in the intercooler 5 enters the second cooling assembly 33 through the fifth cooling port 505 to dissipate heat for the energy storage converter, and then flows back to the intercooler 5 through the sixth cooling port 506 coil, forming a cooling cycle.

[0077] During heating, the gaseous refrigerant pressurized by the first compression mechanism 32 enters the intercooler 5 through the input cooling port 507 for heat exchange, and the liquid refrigerant in the intercooler 5 cools down and reduces the pressure of the exhaust gas of the first compression mechanism 32. The cooled and reduced-pressure refrigerant enters the first cooling component 1 through the first control valve 31 and the first port 11 to heat the battery pack, and then enters the liquid separator 6 through the second port 12 and the second control valve 42. The liquid separator 6 divides the refrigerant into two streams, one of which enters the first heat dissipation component 2 through the coil 51 and the first expansion valve 41 in sequence, and the other enters the intercooler 5 through the second expansion valve 61 and the third cooling port 503.

[0078] Please combine Figure 3 and Figure 4In some embodiments, the cooling device further comprises a second compression mechanism 34, and the second compression mechanism 34 is respectively connected to the first control valve 31 and the fourth cooling port 504 through pipelines. Specifically, the outlet end of the first compression mechanism 32 is connected to the input cooling port 507, the fourth cooling port 504 is connected to the inlet end of the second compression mechanism 34 through a pipeline, and the outlet end of the second compression mechanism 34 is connected to the first control valve 31 through a pipeline. At this time, the first compression mechanism 32 is connected to the third port 21 through the intercooler 5 and the second compression mechanism 34, and the first control valve 31 is used to connect or disconnect the passage between the outlet end of the second compression mechanism 34 and the third port 21, or to connect or disconnect the passage between the outlet end of the second compression mechanism 34 and the first port 11.

[0079] The gaseous refrigerant pressurized by the first compression mechanism 32 enters the intercooler 5 through the input cooling port 507 for heat exchange, and is input into the second compression mechanism 34 through the fourth cooling port 504 after being cooled and reduced in pressure. The second compression mechanism 34 pressurizes the gaseous refrigerant again and sends it into the first heat dissipation component 2 or the first cooling component 1, thereby performing the cooling mode or the heating mode accordingly.

[0080] Please refer to Figure 5 In some embodiments, the cooling device further includes a second heat dissipation component 35, which is connected in series with the first compression mechanism 32. Specifically, the inlet end of the second heat dissipation component 35 is connected to the outlet end of the first compressor 321, and the outlet end of the second heat dissipation component 35 can be connected to the inlet end of the second cooling component 33, that is, after the refrigerant passes through the second heat dissipation component 35, it can directly flow into the inlet end of the second cooling component 33, or, after the refrigerant passes through the second heat dissipation component 35, it first enters the intercooler 5 and then passes through the inlet end of the second cooling component 33. When cooling the energy storage converter, the refrigerant flows into the second heat dissipation component 35 after being compressed by the first compression mechanism 32. The second heat dissipation component 35 moderately cools the refrigerant, increases the heat absorption of the refrigerant in the second cooling component 33, and at the same time reduces the temperature difference between the refrigerant in the first heat dissipation component 2 and the external environment, thereby improving the energy efficiency of the system operation.

[0081] Please combine Figure 6 and Figure 7 In some embodiments, the cooling device further includes a first valve 7, a second valve 8 and a third valve 9, wherein the first valve 7, the second valve 8 and the third valve 9 are all three-way valves, and the first valve 7 includes a plurality of valve ports, each valve port of the first valve 7 is used to connect the fifth cooling port 505, the inlet end of the second cooling component 33 or the passage between the third port 21 and the first control valve 31, and the first valve 7 is used to connect or disconnect the passage between the fifth cooling port 505 and the inlet end of the second cooling component 33.

[0082] The second valve 8 includes multiple valve ports, each valve port of the second valve 8 is used to connect the sixth cooling port 506 coil, the outlet end of the second cooling component 33 or the passage between the third port 21 and the first control valve 31, and the second valve 8 is used to connect or disconnect the passage between the sixth cooling port 506 and the outlet end of the second cooling component 33, and the passage between the outlet end of the second cooling component 33 and the third port 21; or, to connect or disconnect the passage between the outlet end of the second cooling component 33 and the first control valve 31.

[0083] The third valve 9 includes a plurality of valve ports, each valve port of the third valve 9 is used to connect the passage between the fourth port 22, the second control valve 42 or the third port 21 and the first control valve 31, and the third valve 9 is used to connect or disconnect the passage between the second control valve 42 and the fourth port 22, or to cooperate with the first valve 7 to connect or disconnect the passage between the second control valve 42 and the inlet end of the second cooling component 33.

[0084] The inlet end of the second cooling assembly 33 can be connected to the intercooler 5 through the first valve 7, that is, the first valve 7 is connected to the inlet end of the intercooler 5 and the second cooling assembly 33 through pipelines. Under different refrigerant flow paths, the first valve 7 and the intercooler 5 can be connected or closed. The connection relationship between the second valve 8 and the intercooler 5 and the second cooling assembly 33 is the same as the first valve 7, which will not be repeated here. Each valve port of the first control valve 31 is connected to the corresponding component through a pipeline. The passage between the first control valve 31 and the third port 21 is the pipeline connected between the first control valve 31 and the third port 21, which is used to supply the refrigerant from the first port 11 to the first compression mechanism 32, or to supply the refrigerant from the fourth port 22 to the first compression mechanism 32. By adding the first valve 7, the second valve 8 and the third valve 9 in the pipeline of the cooling device, the number of refrigerant circulation paths is increased, which can meet the use requirements of the energy storage cabinet under different working conditions and improve the flexibility of the cooling device.

[0085] During heating, the refrigerant is compressed by the first compression mechanism 32 and then enters the second compression mechanism 34 through the intercooler 5. The second compression mechanism 34 pressurizes and heats the refrigerant again. The pressurized and heated refrigerant enters the first cooling assembly 1 and heats the battery pack, and then enters the liquid distributor 6 through the second control valve 42 and is divided into two paths, one of which is throttled through the second expansion valve 61 and enters the intercooler 5 for cooling the refrigerant passing through the intercooler 5, and the other is passed through the coil 51, the first expansion valve 41, the second control valve 42, the third valve 9, and the first valve 7 to enter the second cooling assembly 33, and then flows out through the second valve 8 and then flows back to the first compression mechanism 32 through the first control valve 31. The third valve 9 adds a branch in parallel with the first heat dissipation assembly 2, and uses the heat of the energy storage inverter as the heat source of the refrigerant. Since the heat source temperature of the energy storage inverter is much higher than the ambient temperature, the energy efficiency of the refrigerant circulation heating can be improved.

[0086] During refrigeration, the refrigerant enters the second cooling assembly 33 through the first compression mechanism 32, the intercooler 5, and the first valve 7, then enters the first heat dissipation assembly 2 through the second valve 8, and then flows to the second control valve 42 through the third valve 9. The third interface 423 is connected to the first interface 421, so that the refrigerant flows to the second control valve 42 through the liquid distributor 6, the coil 51, and the first expansion valve 41. The second interface 422 is connected to the fourth interface 424, and the refrigerant enters the first cooling assembly 1 to absorb the heat generated by the battery pack. Finally, the refrigerant flows back to the first compression mechanism 32 through the first control valve 31. In this circuit, part of the valve ports of the first valve 7, the second valve 8, and the third valve 9 are opened, that is, the path of the refrigerant can be changed according to the valve port combination form of each three-way valve, and different functions can be achieved under the same pipeline connection structure.

[0087] Please combine Figures 8 to 11 In some embodiments, the second cooling component 33 also includes a third control valve 100 and a fourth valve 200. The third control valve 100 is a six-way valve. The third control valve 100 includes a first flow port 1001, a second flow port 1002, a third flow port 1003, a fourth flow port 1004, a fifth flow port 1005 and a sixth flow port 1006. The first flow port 1001 can connect the passage between the third port 21 and the first control valve 31, the second flow port 1002 can connect the intercooler 5, the third flow port 1003 connects the inlet end of the second cooling component 33, the fourth flow port 1004 connects the outlet end of the second cooling component 33, the fifth flow port 1005 can connect the intercooler 5, and the sixth flow port 1006 can connect the passage between the third port 21 and the first control valve 31.

[0088] The fourth valve 200 has three valve ports, two of which are connected to the fourth port 22 and the third interface 423 respectively, and the third valve port is connected to the passage between the first control valve 31 and the third port 21 .

[0089] The third control valve 100 integrates the cooling path switching between the intercooler 5 and the second cooling assembly 33 and between the intercooling assembly and the fourth port 22, reducing the number of pipelines and equipment required in the pipeline system, thereby saving the layout space required for the cooling device.

[0090] Please combine Figures 8 to 11 In some embodiments, the third control valve 100 is configured to connect the fourth flow port 1004 and the sixth flow port 1006 when the second flow port 1002 and the third flow port 1003 are connected, so that the intercooler 5 is connected to the inlet end of the second cooling component 33, and the outlet end of the second cooling component 33 is connected to the third port 21. During medium and low temperature refrigeration, the refrigerant flows out through the first compression mechanism 32 and the intermediate cooler 5, enters the second cooling component 33 through the first flow port 1001 and the third flow port 1003 to absorb the heat of the energy storage inverter, and then flows out from the second cooling component 33, and flows into the first heat dissipation component 2 through the fourth flow port 1004 and the sixth flow port 1006; after flowing out of the first heat dissipation component 2, the refrigerant flows to the second control valve 42 through the first port and the second port of the fourth valve 200. At this time, the refrigerant can directly enter the first cooling component 1 through the second control valve 42 for cooling, or flow to the liquid distributor 6 through the second control valve 42. The specific path is determined according to the ambient temperature of the battery pack to reduce unnecessary paths for the refrigerant and improve energy efficiency.

[0091] Alternatively, the third control valve 100 is further configured to be able to connect the fourth flow port 1004 and the fifth flow port 1005 when connecting the second flow port 1002 and the third flow port 1003, so that the intercooler 5 is respectively connected to the inlet end and the outlet end of the second cooling assembly 33. During high-temperature cooling, the liquid refrigerant throttled by the second expansion valve 61 flows into the intercooler 5, and the liquid refrigerant enters the second cooling assembly 33 through the second flow port 1002 and the third flow port 1003, and then flows back to the intercooler 5 through the fourth flow port 1004 and the fifth flow port 1005.

[0092] Alternatively, the third control valve 100 is also configured to be able to connect the fourth flow port 1004 and the sixth flow port 1006 when the first flow port 1001 and the third flow port 1003 are connected, so that the third port of the fourth valve 200 is connected to the inlet end of the second cooling component 33, and the outlet end of the second cooling component 33 is connected to the inlet end of the first compression mechanism 32. During heating, the refrigerant after throttling by the first expansion valve 41 flows to the fourth valve 200 through the second interface 422 and the third interface 423, flows to the third control valve 100 through the second port and the third port of the fourth valve 200, and then enters the second cooling component 33 through the first flow port 1001 and the third flow port 1003. After the refrigerant flows out of the second cooling component 33, it flows back to the first compression mechanism 32 through the first control valve 31. The third control valve 100 and the fourth valve 200 cooperate to achieve an optimized flow path of the refrigerant in medium and low temperature refrigeration, high temperature refrigeration, and heating modes.

[0093] Please combine Fig.12 and Fig.13 In some embodiments, the cooling device further includes a subcooler 300, which is connected to the first outlet end of the liquid separator 6 and the inlet end of the first expansion valve 41, respectively. The refrigerant flowing out of the first outlet end of the liquid separator 6 enters the subcooler 300, and the subcooler 300 is used to cool the refrigerant to a temperature lower than its saturation temperature, so that it is in a supercooled state, thereby improving the refrigeration capacity and performance of the device in the refrigeration mode. At the same time, the liquid refrigerant throttled by the second expansion valve 61 is used to exchange heat with the refrigerant flowing into the first compression mechanism 32 or the second cooling component 33, which can ensure the heat exchange effect of the liquid refrigerant.

[0094] Please combine Fig.12 and Fig.13 In some embodiments, the cooling device further includes a third heat dissipation component 400, the inlet end of the third heat dissipation component 400 is connected to the outlet end of the first compression mechanism 32, and the outlet end can be connected to the intercooler 5. During cooling, the third heat dissipation component 400 dissipates heat to the refrigerant before entering the second cooling component 33 to reduce the temperature of the refrigerant, so that the refrigerant can absorb relatively more heat dissipated by the energy storage inverter, thereby improving the cooling effect on the energy storage inverter. In some other embodiments, if the cooling demand of the energy storage inverter is relatively low, the arrangement of the third heat dissipation component 400 can also be removed.

[0095] Accordingly, a thermal management system provided in an embodiment of the present application includes the cooling device of the above embodiment, and the thermal management system includes at least one of the following modes:

[0096] Low power mode: the outlet of the first compression mechanism 32 is connected to the inlet of the second cooling assembly 33, the outlet of the second cooling assembly 33 is connected to the third port 21, and the first port 11 is connected to the inlet of the first compression mechanism 32 through the first control valve 31. This mode is mainly for charging and discharging after the battery cell reaches the operating temperature, and the first compression mechanism 32 is only used as a refrigerant driver.

[0097] Medium and low temperature mode: the outlet of the first compression mechanism 32 is connected to the inlet of the second cooling assembly 33, the outlet of the second cooling assembly 33 is connected to the third port 21, the fourth port 22 is connected to the second port 12 through the intercooler 5, and the first port 11 is connected to the inlet of the first compression mechanism 32 through the first control valve 31. This mode is mainly for the case where the heat of the battery cell gradually increases and the low power mode can no longer meet the cooling requirements.

[0098] High temperature mode: the outlet end of the first compression mechanism 32 is connected to the inlet end of the second compression mechanism 34 via the input cooling port 507 and the fourth cooling port 504, the outlet end of the second compression mechanism 34 is connected to the third port 21 via the first control valve 31, the fourth port 22 is connected to the second port 12 via the second control valve 42 and the coil 51, and the first port 11 is connected to the inlet end of the first compression mechanism 32 through the first control valve 31.

[0099] Heating mode: the outlet end of the first compression mechanism 32 is connected to the inlet end of the second compression mechanism 34 via the input cooling port 507 and the fourth cooling port 504, the outlet end of the second compression mechanism 34 is connected to the first port 11 via the first control valve 31, the second port 12 is connected to the fourth port 22 via the second control valve 42 and the coil 51, and the third port 21 is connected to the inlet end of the first compression mechanism 32 through the first control valve 31.

[0100] Heat recovery mode: the outlet end of the first compression mechanism 32 is connected to the inlet end of the second compression mechanism 34 via the input cooling port 507 and the fourth cooling port 504, the outlet end of the second compression mechanism 34 is connected to the first port 11 via the first control valve 31, the second port 12 is connected to the inlet end of the second cooling component 33 via the second control valve 42, the coil 51, the third valve 9 and the first valve 7, and the outlet end of the second cooling component 33 is connected to the inlet end of the first compression mechanism 32 via the second valve 8 and the first control valve 31.

[0101] The thermal management system can have all the technical features and beneficial effects of the above-mentioned cooling device, which will not be repeated here.

[0102] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0103] The cooling device provided in the embodiments of the present application is introduced in detail above, and the principles and implementation methods of the present application are explained by using specific examples. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cooling device, characterized in that: include: A first cooling component (1), the first cooling component (1) comprising a first port (11) and a second port (12); A first heat dissipation component (2), comprising a third port (21) and a fourth port (22); a first flow path component (3) connected to the first port (11) and the third port (21); the first flow path component (3) comprises a first control valve (31) and a first compression mechanism (32); the first control valve (31) is used to connect or disconnect the passage between the first compression mechanism (32) and the third port (21), and the passage between the first compression mechanism (32) and the first port (11); a second cooling assembly (33), the second cooling assembly (33) being in communication with the first compression mechanism (32) and a passage between the first control valve and the third port through a pipeline; The second flow path component (4) is connected to the second port (12) and the fourth port (22).

2. The cooling device according to claim 1, characterized in that: The cooling device further comprises an intercooler (5), wherein the intercooler (5) comprises a first cooling port (501) and a second cooling port (502), wherein the first cooling port (501) and the second cooling port (502) are connected in series to the second flow path component (4).

3. The cooling device according to claim 1 or 2, characterized in that: The first flow path component (3) further comprises a second compression mechanism (34), and the first compression mechanism (32) is connected to the second compression mechanism (34).

4. The cooling device according to claim 2, characterized in that: The second flow path component (4) comprises a first expansion valve (41), and the first expansion valve (41) is connected to the intercooler (5) via the second cooling port (502).

5. The cooling device according to claim 4, characterized in that: The intercooler (5) further comprises a coil (51) and a third cooling port (503), wherein the inlet end of the coil (51) is connected to the first cooling port (501), and the outlet end of the coil (51) is connected to the second cooling port (502); The cooling device further comprises a second control valve (42), a liquid separator (6) and a second expansion valve (61), wherein the second control valve (42) comprises a plurality of interfaces, each of which is connected to the fourth port (22), the inlet end of the liquid separator (6), the second port (12) and the second cooling port (502), and the second control valve (42) is used to connect or disconnect the passage between the intercooler (5) and the fourth port (22) and the second port (12); The first outlet end of the liquid separator (6) is connected to the first cooling port (501), the second outlet end of the liquid separator (6) is connected to the inlet end of the second expansion valve (61), and the outlet end of the second expansion valve (61) is connected to the third cooling port (503).

6. The cooling device according to claim 5, characterized in that: The intercooler (5) has a fourth cooling port (504), a fifth cooling port (505), a sixth cooling port (506) and an input cooling port (507); The input cooling port (507) is connected to the first compression mechanism (32), the fourth cooling port (504) is connected to the first control valve (31), the inlet end of the second cooling component (33) is connected to the fifth cooling port (505), and the outlet end of the second cooling component (33) is connected to the sixth cooling port (506) and the passage between the third port (21) and the first control valve (31).

7. The cooling device according to claim 6, characterized in that: The cooling device further comprises a second compression mechanism (34), wherein the second compression mechanism (34) is respectively connected to the first control valve (31) and the fourth cooling port (504) through pipelines.

8. The cooling device according to claim 1, characterized in that: The cooling device further comprises a second heat dissipation component (35), wherein the second heat dissipation component (35) is connected in series with the first compression mechanism (32).

9. The cooling device according to claim 7, characterized in that: The cooling device further comprises a first valve (7), a second valve (8) and a third valve (9); The first valve (7) comprises a plurality of valve ports, each valve port of the first valve (7) being used to connect the passage between the fifth cooling port (505), the inlet end of the second cooling assembly (33) or the third port (21) and the first control valve (31), and the first valve (7) being used to connect or disconnect the passage between the intercooler (5) and the inlet end of the second cooling assembly (33); The second valve (8) comprises a plurality of valve ports, each valve port of the second valve (8) being used to connect the sixth cooling port (506), the outlet end of the second cooling component (33) or the passage between the third port (21) and the first control valve (31), and the second valve (8) being used to connect or disconnect the passage between the intercooler (5) and the outlet end of the second cooling component (33), and the passage between the outlet end of the second cooling component (33) and the third port (21); or, being used to connect or disconnect the passage between the outlet end of the second cooling component (33) and the first control valve (31); The third valve (9) comprises a plurality of valve ports, each valve port of the third valve (9) being used to connect the passage between the fourth port (22), the second control valve (42) or the third port (21) and the first control valve (31); the third valve (9) being used to connect or disconnect the passage between the second control valve (42) and the fourth port (22), or being used to cooperate with the first valve (7) to connect or disconnect the passage between the second control valve (42) and the inlet end of the second cooling assembly (33).

10. The cooling device according to claim 7, characterized in that: The cooling device further comprises a third control valve (100) and a fourth valve (200); The third control valve (100) comprises a plurality of valve ports, each of the valve ports being used to connect a passage between the fifth cooling port (505), the sixth cooling port (506), the second cooling assembly (33) or the third port (21) and the first control valve (31); The fourth valve (200) is connected between the fourth port (22) and the second control valve (42), and is connected to the passage between the third port (21) and the first control valve (31) through a pipeline. The fourth valve is used to connect or disconnect the passage between the second control valve (42) and the fourth port (22), or to cooperate with the third control valve (100) to connect or disconnect the passage between the second control valve (42) and the inlet end of the second cooling component (33).

11. The cooling device according to claim 2, characterized in that: The cooling device further comprises a supercooler (300), wherein the supercooler (300) is connected in series to a passage between the fourth port (22) and the second port (12).

12. A thermal management system, characterized in that: The cooling device according to any one of claims 1 to 11, wherein the thermal management system comprises at least one of the following modes: Low power mode: the outlet end of the first compression mechanism (32) is connected to the inlet end of the second cooling assembly (33), the outlet end of the second cooling assembly (33) is connected to the third port (21), and the first port (11) is connected to the inlet end of the first compression mechanism (32) through the first control valve (31); Medium and low temperature mode: the outlet end of the first compression mechanism (32) is connected to the inlet end of the second cooling assembly (33), the outlet end of the second cooling assembly (33) is connected to the third port (21), the fourth port (22) is connected to the second port (12) via the intercooler (5), and the first port (11) is connected to the inlet end of the first compression mechanism (32) via the first control valve (31); High temperature mode: the outlet end of the first compression mechanism (32) is connected to the inlet end of the second compression mechanism (34) via the input cooling port (507) and the fourth cooling port (504); the outlet end of the second compression mechanism (34) is connected to the third port (21) via the first control valve (31); the fourth port (22) is connected to the second port (12) via the second control valve (42) and the coil (51); the first port (11) is connected to the inlet end of the first compression mechanism (32) via the first control valve (31); Heating mode: the outlet end of the first compression mechanism (32) is connected to the inlet end of the second compression mechanism (34) via the input cooling port (507) and the fourth cooling port (504); the outlet end of the second compression mechanism (34) is connected to the first port (11) via the first control valve (31); the second port (12) is connected to the fourth port (22) via the second control valve (42) and the coil (51); the third port (21) is connected to the inlet end of the first compression mechanism (32) via the first control valve (31); Heat recovery mode: the outlet end of the first compression mechanism (32) is connected to the inlet end of the second compression mechanism (34) via the input cooling port (507) and the fourth cooling port (504); the outlet end of the second compression mechanism (34) is connected to the first port (11) via the first control valve (31); the second port (12) is connected to the inlet end of the second cooling component (33) via the second control valve (42), the coil (51), the third valve (9) and the first valve (7); the outlet end of the second cooling component (33) is connected to the inlet end of the first compression mechanism (32) via the second valve (8) and the first control valve (31).

Images