Energy storage temperature control device and method and energy storage system

Abstract

The invention discloses an energy storage temperature control device and method and an energy storage system. The energy storage temperature control device comprises a first cooling loop, a second cooling loop, a first connecting pipeline, a second connecting pipeline and a controllable switch. The first cooling loop communicates with the energy storage device and is used for cooling the energy storage device; the second cooling loop is communicated with the energy storage converter and is used for cooling the energy storage converter; the first connecting pipeline is connected between the first cooling loop outlet and the second cooling loop outlet, the second connecting pipeline is connected between the first cooling loop inlet and the second cooling loop inlet, and the controllable switch is arranged on the second connecting pipeline and used for controlling the communication state of the second connecting pipeline. The power consumption of the energy storage temperature control device can be reduced, and meanwhile the occupied area of the energy storage temperature control device can be reduced.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of temperature control, and in particular, to an energy storage temperature control device and method, and an energy storage system. Background Art

[0002] With the development trend of increasing energy density of energy storage battery systems and higher requirements for floor space, the heat dissipation method of battery packs and energy storage converters (Power Conversion System, PCS) has gradually switched from air cooling to liquid cooling. At present, the liquid cooling methods of PSC include heat dissipation by a single chiller, or heat dissipation by the same chiller in the form of battery packs and PCS in series. Both methods can provide liquid cooling for PCS. However, the heat generated by PCS is relatively large, and the required cooling power consumption is relatively large. When the above-mentioned liquid cooling method is used for cooling, the temperature control system power consumption of the battery pack and PCS is relatively large, and the floor space is large. Summary of the invention

[0003] The present invention provides an energy storage temperature control device and method, and an energy storage system, which control the operating states of a cooling circulation loop of an energy storage device and a cooling circulation loop of an energy storage converter through a controllable switch according to the ambient temperature, thereby reducing the power consumption of the energy storage temperature control device and reducing the occupied area.

[0004] In a first aspect, an embodiment of the present invention provides an energy storage temperature control device, comprising a first connecting pipeline, a second connecting pipeline, a first cooling circuit, a second cooling circuit and a controllable switch;

[0005] The first cooling circuit is connected to the energy storage device for cooling the energy storage device; the second cooling circuit is connected to the energy storage inverter for cooling the energy storage inverter; the first connecting pipeline is connected between the first cooling circuit outlet and the second cooling circuit outlet, the second connecting pipeline is connected between the first cooling circuit inlet and the second cooling circuit inlet, and the controllable switch is arranged on the second connecting pipeline for controlling the connection state of the second connecting pipeline.

[0006] Optionally, the first cooling circuit includes a heat exchanger, a condensation structure, a first pipeline and a second pipeline;

[0007] The first end of the first heat exchange pipe of the heat exchanger is connected to the outlet of the first cooling circuit through the first pipe, the second end of the first heat exchange pipe of the heat exchanger is connected to the inlet of the first cooling circuit through the second pipe, and the second heat exchange pipe of the heat exchanger is connected to both ends of the condensation structure;

[0008] The second cooling circuit includes a dry cooling structure, a third pipeline and a fourth pipeline; the first end of the dry cooling structure is connected to the outlet of the second cooling circuit through the third pipeline, and the second end of the dry cooling structure is connected to the inlet of the second cooling circuit through the fourth pipeline.

[0009] Optionally, the energy storage temperature control device also includes a fan; the condensation structure includes a condenser, the dry cooling structure includes a dry cooler, the fan is arranged on one side of the condenser and the dry cooler, and the fan is used to provide outdoor air for the condenser and the dry cooler.

[0010] Optionally, the condenser and the dry cooler are stacked, and the fan is arranged on a side of the condenser away from the dry cooler.

[0011] Optionally, the energy storage temperature control device further includes a control unit and an outdoor temperature detection unit;

[0012] The outdoor temperature detection unit is arranged on a side of the condenser and the dry cooler away from the fan, and the outdoor temperature detection unit is used to detect the temperature of the outdoor air and form an outdoor temperature signal; the control unit is connected to the outdoor temperature detection unit, and the controllable switch and the condensation structure are connected to the control unit, and the control unit is used to control the state of the controllable switch and the condensation structure according to the outdoor temperature signal.

[0013] In a second aspect, an embodiment of the present invention further provides a method for controlling energy storage temperature, which is performed by using an energy storage temperature control device according to the first aspect, and the method includes:

[0014] Get outdoor temperature signal;

[0015] The state of the controllable switch is controlled according to the outdoor temperature signal.

[0016] Optionally, the first cooling circuit includes a heat exchanger, a condensing structure, a first pipeline, and a second pipeline; the first end of the first heat exchange pipeline of the heat exchanger is connected to the outlet of the first cooling circuit through the first pipeline, the second end of the first heat exchange pipeline of the heat exchanger is connected to the inlet of the first cooling circuit through the second pipeline, and the second heat exchange pipeline of the heat exchanger is connected to both ends of the condensing structure; the second cooling circuit includes a dry cooling structure, a third pipeline and a fourth pipeline; the first end of the dry cooling structure is connected to the outlet of the second cooling circuit through the third pipeline, and the second end of the dry cooling structure is connected to the inlet of the second cooling circuit through the fourth pipeline;

[0017] Controlling the state of the controllable switch according to the outdoor temperature signal includes:

[0018] When the outdoor temperature signal is greater than a first temperature characteristic value, the condensation structure is controlled to start according to the outdoor temperature signal, and the controllable switch is turned on;

[0019] When the outdoor temperature signal is less than or equal to the first temperature characteristic value and greater than or equal to the second temperature characteristic value, the condensation structure is controlled to start according to the outdoor temperature signal, and the controllable switch is turned off; wherein the second temperature characteristic value is less than the first temperature characteristic value;

[0020] When the outdoor temperature signal is less than a second temperature characteristic value, the condensation structure is controlled to be closed and the controllable switch is turned on according to the outdoor temperature signal.

[0021] Optionally, the energy storage temperature control device includes a fan, the condensation structure includes a condenser, the dry cooling structure includes a dry cooler, and the fan is arranged on one side of the condenser and the dry cooler; when the state of the condensation structure and the controllable switch is controlled according to the outdoor temperature signal, it also includes:

[0022] Control the fan to start.

[0023] Optionally, the energy storage temperature control device further includes a first power pump and a second power pump, the first power pump is connected to the first pipeline, and the second power pump is connected to the third pipeline; when the state of the condensation structure and the controllable switch is controlled according to the outdoor temperature signal, it also includes:

[0024] When the outdoor temperature signal is greater than a first temperature characteristic value, the first power pump is controlled to be turned on and the second power pump is controlled to be turned off according to the outdoor temperature signal;

[0025] When the outdoor temperature signal is less than or equal to the first temperature characteristic value and greater than or equal to the second temperature characteristic value, the first power pump is controlled to be turned on and the second power pump is controlled to be turned on according to the outdoor temperature signal;

[0026] When the outdoor temperature signal is less than a second temperature characteristic value, the first power pump is controlled to be turned off and the second power pump is controlled to be turned on according to the outdoor temperature signal.

[0027] In a third aspect, an embodiment of the present invention further provides an energy storage system, comprising an energy storage device, an energy storage inverter and the energy storage temperature control device described in the first aspect; a first cooling circuit in the energy storage temperature control device is arranged around the energy storage device, a second cooling circuit in the energy storage temperature control device is arranged around the energy storage inverter, and the energy storage temperature control device is used to control the temperature of the energy storage device and the energy storage inverter.

[0028] According to the technical solution of the embodiment of the present invention, the energy storage temperature control device is connected to the third pipeline by setting the second end of the first connecting pipeline, the first end of the second connecting pipeline is connected to the second pipeline, the second end of the second connecting pipeline is connected to the fourth pipeline, and the controllable switch is set on the second connecting pipeline. By controlling the on or off of the controllable switch, the operating state of the cooling circulation loop of the energy storage device and the cooling circulation loop of the energy storage converter can be controlled, so that when the controllable switch is turned on, the cooling circulation loop of the energy storage device and the cooling circulation loop of the energy storage converter can be connected in parallel, and the cooling circulation loop of the energy storage device and the cooling circulation loop of the energy storage converter can share the cooling capacity. Compared with the situation where the energy storage device and the energy storage converter respectively dissipate heat through a chiller, the number of condensers required can be reduced on the basis of meeting the temperature reduction, thereby reducing the energy consumption of the compressor and greatly reducing the energy consumption of the energy storage temperature control device. Alternatively, relative to the situation where the energy storage device and the energy storage converter share a chiller for heat dissipation, the cooling effect of the chiller can be improved on the basis of the same energy consumption by setting the cooling circulation loop of the energy storage device and the cooling circulation loop of the energy storage converter in parallel. When the controllable switch is turned off, the energy storage device and the energy storage converter can be connected to different cooling circulation loops separately, so that the temperature of different cooling circulation loops can be independently controlled when the coolant temperature required for the energy storage device and the energy storage converter is different when they are working, and the temperature is reduced as much as possible through a dry cooler or an outdoor cold source, thereby reducing the energy consumption of the compressor. On the basis of meeting the temperature control requirements of the energy storage device and the energy storage converter, the power consumption of the energy storage temperature control device is reduced. At the same time, the cooling circulation loops of the energy storage device and the energy storage converter can be integrated in the same device, which can reduce the footprint of the energy storage temperature control device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the principle structure of an energy storage temperature control device provided by an embodiment of the present invention;

[0030] Figure 2 A schematic flow chart of a method for controlling energy storage temperature provided by an embodiment of the present invention;

[0031] Figure 3 A schematic flow chart of another energy storage temperature control method provided in an embodiment of the present invention.

[0032] Figure numerals: 100: condensation structure, a: first end of the first heat exchange pipe, b: second end of the first heat exchange pipe, c: first end of the second heat exchange pipe, d: second end of the second heat exchange pipe, 200: dry cooling structure, L1: first pipeline, L2: second pipeline, L3: third pipeline, L4: fourth pipeline, L5: first connecting pipeline, L6: second connecting pipeline, 1: first power pump, 2: second power pump, 3: expansion tank, 4: filling and draining valve, 5: compressor , 6: heat exchanger, 7: fan, 8: condenser, 9: dry cooler, 10: outdoor temperature detection unit, 11: expansion valve, 12: second one-way valve, 13: first one-way valve, 14: controllable switch, 15: battery pack water inlet temperature sensor, 16: PCS water inlet temperature sensor, 17: energy storage device, 171: first cooling circuit outlet, 172: first cooling circuit inlet, 18: energy storage inverter, 181: second cooling circuit outlet, 182: second cooling circuit inlet. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] Figure 1 The schematic diagram of the principle structure of an energy storage temperature control device provided by an embodiment of the present invention. Figure 1 As shown, the energy storage temperature control device includes a first cooling circuit, a second cooling circuit, a first connecting pipeline L5, a second connecting pipeline L6 and a controllable switch 14; the first cooling circuit is connected to the energy storage device 17 for cooling the energy storage device 17; the second cooling circuit is connected to the energy storage converter 18 for cooling the energy storage converter 18; the first connecting pipeline L5 is connected between the first cooling circuit outlet 171 and the second cooling circuit outlet 181, the second connecting pipeline L6 is connected between the first cooling circuit inlet 172 and the second cooling circuit inlet 182, and the controllable switch 14 is arranged on the second connecting pipeline L6 for controlling the connection state of the second connecting pipeline L6.

[0035] Specifically, the energy storage device 17 can be used to store electrical energy, such as a battery pack. The energy storage inverter 18 is used to control the charging and discharging process of the energy storage device 17 and perform AC-DC conversion, so that the energy storage device 17 can supply power to an AC load or a DC load when there is no power grid, and can charge the energy storage device 17 through the power grid when there is a power grid. During the operation of the energy storage device 17 and the energy storage inverter 18, the energy storage device 17 and the energy storage inverter 18 generate a lot of heat. The energy storage temperature control device includes a first cooling circuit and a second cooling circuit. The first cooling circuit is arranged around the energy storage device 17 and is used to control the temperature of the energy storage device 17. The second cooling circuit is arranged around the energy storage inverter 18 and is used to control the temperature of the energy storage inverter 18.

[0036] The controllable switch 14 is used to control the connection state of the second connecting pipeline L6. When the controllable switch 14 is turned on, the second connecting pipeline L6 is in a passage state, and the first connecting pipeline L5 and the second connecting pipeline L6 can connect the first cooling circuit and the second cooling circuit. At this time, the cooling circulation circuit of the energy storage device 17 and the cooling circulation circuit of the energy storage converter 18 are in a connected state, that is, the cooling circulation circuit of the energy storage device 17 and the cooling circulation circuit of the energy storage converter 18 are in a parallel operation state. The cooling circulation circuit of the energy storage device 17 and the cooling circulation circuit of the energy storage converter 18 can share the cooling capacity. When the required cooling capacity is provided by the condenser, the cooling circulation circuit of the energy storage device 17 and the cooling circulation circuit of the energy storage converter 18 can share the cooling capacity provided by the condenser. Compared with the situation where the energy storage device 17 and the energy storage converter 18 dissipate heat through a chiller respectively, the number of condensers can be reduced on the basis of meeting the temperature reduction, thereby reducing the energy consumption of the compressor and greatly reducing the energy consumption of the energy storage temperature control device. Alternatively, compared with the situation where the energy storage device 17 and the energy storage inverter 18 share a chiller for heat dissipation, the cooling cycle loop of the energy storage device 17 and the cooling cycle loop of the energy storage inverter 18 can be set in parallel to improve the cooling effect of the chiller on the basis of the same energy consumption.

[0037] When the controllable switch 14 is turned off, the second connecting pipeline L6 is in a closed state, and the first cooling circuit and the second cooling circuit are in a closed state. At this time, the cooling circulation circuit of the energy storage device 17 and the cooling circulation circuit of the energy storage converter 18 are in a closed state, that is, the cooling circulation circuit of the energy storage device 17 and the cooling circulation circuit of the energy storage converter 18 are in an independent operation state. The energy storage device 17 and the energy storage converter 18 can be connected to different cooling circulation circuits separately, so that the temperature of different cooling circulation circuits can be independently controlled when the coolant temperature required by the energy storage device 17 and the energy storage converter 18 is different when working, and the temperature is reduced as much as possible through the dry cooler or outdoor cold source, thereby reducing the energy consumption of the compressor. On the basis of meeting the temperature control requirements of the energy storage device 17 and the energy storage converter 18, the power consumption of the energy storage temperature control device is reduced. At the same time, the cooling circulation circuits of the energy storage device 17 and the energy storage converter 18 can be integrated in the same device, reducing the footprint of the energy storage temperature control device. Exemplarily, the controllable switch 14 can be a solenoid valve.

[0038] The technical solution of this embodiment is to set a first connecting pipeline L5 connected between the first cooling circuit outlet 171 and the second cooling circuit outlet 181, and a second connecting pipeline L6 connected between the first cooling circuit inlet 172 and the second cooling circuit inlet 182, and a controllable switch 14 is set on the second connecting pipeline L6. By controlling the on or off of the controllable switch 14, the operating state of the cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage converter 18 can be controlled. Therefore, when the controllable switch 14 is turned on, the cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage converter 18 can be connected in parallel, and the cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage converter 18 can share the cooling capacity. Compared with the situation where the energy storage device 17 and the energy storage converter 18 dissipate heat through a chiller respectively, the number of condensers can be reduced on the basis of meeting the temperature reduction, thereby reducing the energy consumption of the compressor and greatly reducing the energy consumption of the energy storage temperature control device. Alternatively, compared with the situation where the energy storage device 17 and the energy storage inverter 18 share a chiller for heat dissipation, the cooling cycle loop of the energy storage device 17 and the cooling cycle loop of the energy storage inverter 18 can be set in parallel to improve the cooling effect of the chiller on the basis of the same energy consumption.

[0039] When the controllable switch 14 is turned off, the energy storage device 17 and the energy storage inverter 18 can be connected to different cooling circulation loops separately, so that the temperatures of different cooling circulation loops can be independently controlled when the coolant temperatures required by the energy storage device 17 and the energy storage inverter 18 are different when they are working, and the temperature is reduced as much as possible through a dry cooler or an outdoor cold source, thereby reducing the energy consumption of the compressor. On the basis of meeting the temperature control requirements of the energy storage device 17 and the energy storage inverter 18, the power consumption of the energy storage temperature control device is reduced. At the same time, the cooling circulation loops of the energy storage device 17 and the energy storage inverter 18 can be integrated into the same device, which can reduce the footprint of the energy storage temperature control device.

[0040] Continue to refer Figure 1 The first cooling circuit includes a heat exchanger 6, a condensation structure 100, a first pipeline L1 and a second pipeline L2; the first end a of the first heat exchange pipeline of the heat exchanger 6 is connected to the first cooling circuit outlet 171 through the first pipeline L1, the second end b of the first heat exchange pipeline of the heat exchanger 6 is connected to the first cooling circuit inlet 172 through the second pipeline L2, and the second heat exchange pipeline of the heat exchanger 6 is connected to both ends of the condensation structure 100; the second cooling circuit includes a dry cooling structure 200, a third pipeline L3 and a fourth pipeline L4; the first end of the dry cooling structure 200 is connected to the second cooling circuit outlet 181 through the third pipeline L3, and the second end of the dry cooling structure 200 is connected to the second cooling circuit inlet 182 through the fourth pipeline L4.

[0041] Specifically, the first end a of the first heat exchange pipe of the heat exchanger 6 is connected to the first cooling circuit outlet 171 through the first pipe L1, and the second end b of the first heat exchange pipe of the heat exchanger 6 is connected to the first cooling circuit inlet 172 through the second pipe L2. At this time, the first pipe L1, the first heat exchange pipe of the heat exchanger 6, the second pipe L2 and the first cooling circuit constitute the cooling circulation loop of the energy storage device 17. At the same time, the second heat exchange pipe of the heat exchanger 6 is connected to both ends of the condensation structure 100. When the energy storage device 17 is condensed and cooled, the coolant flowing out of the first cooling circuit outlet 171 is output to the first heat exchange pipe of the heat exchanger 6. At the same time, the condensation structure 100 is working, and when the coolant flows to the first heat exchange pipe, the condensation structure 100 exchanges heat with the coolant in the first heat exchange pipe through the refrigerant in the second heat exchange pipe, thereby reducing the coolant temperature in the first heat exchange pipe. After cooling the coolant in the first heat exchange pipe, the coolant in the first heat exchange pipe is output to the first cooling circuit inlet 172 to provide the first cooling circuit with cooled coolant, thereby controlling the temperature of the energy storage device 17.

[0042] The first end of the dry cooling structure 200 is connected to the second cooling circuit outlet 181 through the third pipeline L3, and the second end of the dry cooling structure 200 is connected to the second cooling circuit inlet 182 through the fourth pipeline L4. At this time, the third pipeline L3, the dry cooling structure 200, the fourth pipeline L4 and the second cooling circuit constitute the cooling circulation loop of the energy storage inverter 18. When the energy storage inverter 18 is subjected to dry cooling, the coolant flowing out of the second cooling circuit outlet 181 is output to the dry cooling structure 200. At the same time, the dry cooling structure 200 works to cool the refrigerant in the dry cooling structure 200, and then the refrigerant exchanges heat with the coolant outside the dry cooling structure 200 to cool the coolant flowing through the dry cooling structure 200. The cooled coolant is output to the second cooling circuit inlet 182 to provide the second cooling circuit with the cooled coolant, so that the energy storage inverter 18 can be cooled.

[0043] The controllable switch 14 is used to control the connectivity of the second connecting pipeline L6. When the controllable switch 14 is turned on, the second connecting pipeline L6 is in a connection state, and the second pipeline L2 and the fourth pipeline L4 can be connected. At this time, the cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage inverter 18 are in a connected state, that is, the cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage inverter 18 are in a parallel operation state. The cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage inverter 18 can share cooling capacity. Compared with the situation where the energy storage device 17 and the energy storage inverter 18 dissipate heat through a chiller respectively, the number of condensers required can be reduced on the basis of meeting the cooling requirements, thereby reducing the energy consumption of the compressor and greatly reducing the energy consumption of the energy storage temperature control device. Alternatively, compared with the situation where the energy storage device 17 and the energy storage inverter 18 share a chiller for heat dissipation, the cooling cycle loop of the energy storage device 17 and the cooling cycle loop of the energy storage inverter 18 can be set in parallel to improve the cooling effect of the chiller on the basis of the same energy consumption.

[0044] When the controllable switch 14 is turned off, the second connecting pipeline L6 is in a closed state, so that the second pipeline L2 and the fourth pipeline L4 are in a closed state. At this time, the cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage converter 18 are in a closed state, that is, the cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage converter 18 are in an independent operation state. The energy storage device 17 and the energy storage converter 18 can be connected to different cooling circulation loops separately, so that the temperature of different cooling circulation loops can be independently controlled when the coolant temperature required by the energy storage device 17 and the energy storage converter 18 is different when working, and the temperature is reduced as much as possible through the dry cooler or outdoor cold source, thereby reducing the energy consumption of the compressor. On the basis of meeting the temperature control requirements of the energy storage device 17 and the energy storage converter 18, the power consumption of the energy storage temperature control device is reduced. Moreover, the outdoor cold source can be used to cool at least the energy storage converter 18 through the dry cooling structure 200, which can further reduce the power consumption of the energy storage temperature control device. At the same time, the cooling circulation loops of the energy storage device 17 and the energy storage converter 18 can be integrated into the same device, which reduces the footprint of the energy storage temperature control device. Exemplarily, the controllable switch 14 can be a solenoid valve.

[0045] When the controllable switch 14 is turned off, the second pipeline L2 and the fourth pipeline L4 are in a closed state. The cooling circulation loop of the energy storage device 17 can be cooled by the condensation structure 100, and the cooling circulation loop of the energy storage converter 18 can be cooled by using the outdoor cold source through the dry cooling structure 200. When the controllable switch 14 is turned on, the second pipeline L2 and the fourth pipeline L4 are in a connected state. When the condensation structure 100 is working, after the refrigerant in the second heat exchange pipe exchanges heat with the coolant in the first heat exchange pipe, the coolant in the first heat exchange pipe can be output to the first cooling circuit inlet 172 to provide the first cooling circuit with the cooled coolant. At the same time, it can be output to the second cooling circuit inlet 182 through the conductive second connecting pipeline L6 to provide the second cooling circuit with the cooled coolant. At this time, the energy storage device 17 and the energy storage converter 18 can be condensed and cooled through the condensation structure 100 at the same time. When the condensation structure 100 is not working and the dry cooling structure 200 is working, the coolant output by the dry cooling structure 200 is output to the second cooling circuit inlet 182, providing the second cooling circuit with cooled coolant. At the same time, it can be output to the first cooling circuit inlet 172 through the connected second connecting pipeline L6, providing the first cooling circuit with cooled coolant. At this time, the energy storage device 17 and the energy storage converter 18 can simultaneously perform dry cooling through the dry cooling structure 100.

[0046] The power consumption of the dry cooling structure 200 is relatively low. During the operation of the energy storage temperature control device, the working state of the controllable switch 14 and the condensation structure 100 can be controlled according to the outdoor temperature. At the same time, the dry cooling structure 200 can maintain the working state, so that the dry cooling structure 200 uses the outdoor cold source to cool the coolant inside it, at least to cool the energy storage converter 18, making full use of the outdoor cold source and reducing the power consumption of the energy storage temperature control device. When the outdoor temperature is relatively high, the cooling effect of the dry cooling structure 200 using the outdoor cold source to cool the coolant inside it cannot meet the cooling requirements of the energy storage device 17 and the energy storage converter 18. At this time, the energy storage device 17 and the energy storage converter 18 can be cooled by the condensation structure 100 at the same time. At this time, the outdoor cold source can cool the condensation structure 100, reducing the power consumption of the condensation structure 100. When the outdoor temperature is relatively low, the dry cooling structure 200 uses an outdoor cold source to cool the cooling liquid inside it, and the cooling effect can meet the cooling demand of the energy storage inverter 18. At this time, the energy storage device 17 can be cooled by the condensing structure 100, and the energy storage inverter 18 can be cooled by the dry cooling structure 200 at the same time, which not only meets the cooling demand, but also reduces the power consumption of the energy storage temperature control device through the cooling of the dry cooling structure 200. When the outdoor temperature is very low, the dry cooling structure 200 uses an outdoor cold source to cool the cooling liquid inside it, and the cooling effect can meet the cooling demand of the energy storage device 17 and the energy storage inverter 18 at the same time. At this time, the energy storage device 17 and the energy storage inverter 18 can be cooled by the dry cooling structure 200 at the same time, further reducing the power consumption of the energy storage temperature control device.

[0047] Exemplarily, the operating temperature of the energy storage inverter 18 can be less than or equal to 60°C. When the ambient temperature is relatively high, for example, greater than 40°C, the cooling effect of the dry cooling structure 200 using an outdoor cold source to cool the coolant inside it cannot meet the cooling requirements of the energy storage device 17 and the energy storage inverter 18. At this time, the controllable switch 14 can be controlled to be turned on, and the condensation structure 100 can work, so that the condensation structure 100 can condense and cool the energy storage device 17 and the energy storage inverter 18 at the same time. When the ambient temperature is relatively low, for example, greater than or equal to 0°C and less than or equal to 40°C, the cooling effect of the dry cooling structure 200 using an outdoor cold source to cool the coolant inside it can meet the cooling requirements of the energy storage inverter 18. At this time, the controllable switch 14 can be controlled to be turned off, the condensation structure 100 and the dry cooling structure 200 are working, the condensation structure 100 performs condensation cooling for the energy storage device 17, and the dry cooling structure 200 performs dry cooling for the energy storage inverter 18, thereby reducing the power consumption of the condensation structure 100 for cooling the energy storage inverter 18. When the ambient temperature is very low, for example, less than 0°C, the cooling effect of the dry cooling structure 200 using an outdoor cold source to cool the coolant inside it can simultaneously meet the cooling requirements of the energy storage device 17 and the energy storage inverter 18. At this time, the controllable switch 14 can be controlled to be turned on, the condensation structure 100 does not work, and the dry cooling structure 200 works. The dry cooling structure 200 performs dry cooling for the energy storage device 17 and the energy storage inverter 18, which can further reduce the power consumption of the energy storage temperature control device.

[0048] The technical solution of this embodiment is to set the second end of the first connecting pipeline L5 to be connected to the third pipeline L3, the first end of the second connecting pipeline L6 to be connected to the second pipeline L2, the second end of the second connecting pipeline L6 to be connected to the fourth pipeline L4, and the controllable switch 14 is set on the second connecting pipeline L6. By controlling the on or off of the controllable switch 14, the operating state of the cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage converter 18 can be controlled, so that when the controllable switch 14 is turned off, the energy storage device 17 and the energy storage converter 18 can be connected to different cooling circulation loops separately, so that the temperature of different cooling circulation loops can be independently controlled when the coolant temperature required by the energy storage device 17 and the energy storage converter 18 is different during operation, and the power consumption of the energy storage temperature control device is reduced on the basis of meeting the temperature control requirements of the energy storage device 17 and the energy storage converter 18. Moreover, when the controllable switch 14 is turned on, the energy storage device 17 and the energy storage converter 18 can be cooled by using at least an outdoor cold source through the dry cooling structure 200, which can further reduce the power consumption of the energy storage temperature control device. At the same time, the cooling circulation loops of the energy storage device 17 and the energy storage converter 18 can be integrated into the same device, which can reduce the footprint of the energy storage temperature control device.

[0049] Continue to refer Figure 1The energy storage temperature control device also includes a fan 7; the condensation structure 110 includes a condenser 8, and the dry cooling structure 200 includes a dry cooler 9. The fan 7 is arranged on one side of the condenser 8 and the dry cooler 9, and the fan 7 is used to provide outdoor air for the condenser 8 and the dry cooler 9.

[0050] Specifically, the fan 7 is arranged on one side of the condenser 8 and the dry cooler 9. When the fan 7 rotates, the mechanical energy of rotation is converted into air pressure energy and kinetic energy to transport the air out. The air outlet side of the fan 7 can be located on the side away from the condenser 8 and the dry cooler 9. At this time, the outdoor air can pass through the condenser 8 and the dry cooler 9 from the side of the condenser 8 and the dry cooler 9 away from the fan 7. Therefore, the condenser 8 and the dry cooler 9 and the coolant inside the two can be naturally cooled and cooled by the outdoor air, reducing the output frequency of the condenser 8 and the dry cooler 9, thereby reducing the power consumption of the condenser 8 and the dry cooler 9, and reducing the power consumption of the energy storage temperature control device.

[0051] Continue to refer Figure 1 The condenser 8 and the dry cooler 9 are stacked, and the fan 7 is arranged on a side of the condenser 8 away from the dry cooler 9.

[0052] Specifically, the condenser 8 and the dry cooler 9 are stacked, and the fan 7 is arranged on the side of the condenser 8 away from the dry cooler 9. When the outdoor air passes through the condenser 8 and the dry cooler 9 from the side of the condenser 8 and the dry cooler 9 away from the fan 7, the outdoor air can pass through the dry cooler 9 and the condenser 8 in sequence. At the same time, it can be ensured that when the outdoor air passes through the condenser 8 and the dry cooler 9, the area of ​​the condenser 8 and the dry cooler 9 receiving the outdoor air can improve the natural cooling efficiency of the condenser 8 and the dry cooler 9, and reduce the power consumption of the energy storage temperature control device.

[0053] Continue to refer Figure 1 The condensation structure 100 also includes a compressor 5, the input end of the compressor 5 is connected to the first end c of the second heat exchange pipe, the output end of the compressor 5 is connected to the input end of the condenser 8, and the output end of the condenser 8 is connected to the second end d of the second heat exchange pipe. When the coolant flowing out of the first cooling circuit outlet 171 is output to the first heat exchange pipe of the heat exchanger 6, the compressor 5 can compress the low-temperature and low-pressure refrigerant gas provided by the first end c of the second heat exchange pipe through the operation of the motor to drive the piston to output the high-temperature and high-pressure refrigerant gas to the condenser 8, providing refrigeration cycle power for the condenser 8. The condenser 8 condenses the gas and then outputs it to the second end d of the second heat exchange pipe to realize the condensation cycle of the gas in the second heat exchange pipe. When the gas output by the condenser 8 passes through the second heat exchange pipe, it can exchange heat with the coolant in the first heat exchange pipe, so that the energy storage device 17 can be cooled and controlled.

[0054] Continue to refer Figure 1The condensation structure 100 may further include an expansion valve 11 for adjusting the flow rate of the gas output from the condenser 8 transmitted to the second heat exchange pipeline, thereby controlling the temperature of the energy storage device 17.

[0055] Continue to refer Figure 1 The dry cooling structure 200 further includes a first one-way valve 13, which is connected to the fourth pipeline L4, and the conducting direction of the first one-way valve 13 is the direction from the dry cooler 9 to the second cooling circuit inlet 182. By arranging the first one-way valve 13 on the fourth pipeline L4, the flow direction of the coolant in the fourth pipeline L4 can be the direction from the dry cooler 9 to the second cooling circuit inlet 182, thereby ensuring the circulation of the coolant in the cooling circulation loop of the energy storage converter 18.

[0056] Continue to refer Figure 1 The energy storage temperature control device further includes a second one-way valve 12, which is connected to the second pipeline L2, and the conduction direction of the second one-way valve 12 is the direction from the first heat exchange pipeline to the first cooling circuit inlet 172. By arranging the second one-way valve 12 on the second pipeline L2, the flow direction of the coolant in the second pipeline L2 can be the direction from the first heat exchange pipeline to the first cooling circuit inlet 172, thereby ensuring the circulation of the coolant in the cooling circulation circuit of the energy storage device 17.

[0057] Continue to refer Figure 1 The energy storage temperature control device also includes a control unit ( Figure 1 The outdoor temperature detection unit 10 is arranged on the side of the condenser 8 and the dry cooler 9 away from the fan 7, and the outdoor temperature detection unit 10 is used to detect the temperature of the outdoor air and form an outdoor temperature signal; the control unit is connected to the outdoor temperature detection unit 10, and the controllable switch 14 and the condensation structure 100 are connected to the control unit, and the control unit is used to control the state of the controllable switch 14 and the condensation structure 100 according to the outdoor temperature signal.

[0058] Specifically, the outdoor temperature detection unit 10 can be an outdoor temperature sensor. The outdoor temperature detection unit 10 can monitor the temperature of the outdoor air and form an outdoor temperature signal, which is output to the control unit. The control unit controls the conduction state of the controllable switch 14 according to the outdoor temperature signal, so as to control the operating state of the cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage inverter 18. At the same time, the working state of the condensation structure 100 can be controlled to control the cooling mode of the cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage inverter 18, and reduce the power consumption of the energy storage temperature control device on the basis of meeting the temperature control requirements of the energy storage device 17 and the energy storage inverter 18.

[0059] Continue to refer Figure 1The energy storage temperature control device also includes a first power pump 1 and a second power pump 2; the first power pump 1 is connected to the first pipeline L1, and the first power pump 1 is used to realize the coolant circulation in the first cooling circuit; the second power pump 2 is connected to the third pipeline L3, and the second power pump 2 is used to realize the coolant circulation in the second cooling circuit.

[0060] Specifically, when the coolant is water, the first power pump 1 and the second power pump 2 can be water pumps of the same model. The first power pump 1 is connected to the first pipeline L1. When the first power pump 1 is turned on, it can provide power for the coolant circulation in the first pipeline L1, so that the coolant in the circulation loop where the first pipeline L1 is located circulates. When the first power pump 1 is turned off, the coolant in the first pipeline L1 has no circulation power, and the coolant in the first pipeline L1 stops circulating. Similarly, the second power pump 2 is connected to the third pipeline L3. When the second power pump 2 is turned on, it can provide power for the coolant circulation in the third pipeline L3, so that the coolant in the circulation loop where the third pipeline L3 is located circulates. When the second power pump 2 is turned off, the coolant in the third pipeline L3 has no circulation power, and the coolant in the third pipeline L3 stops circulating.

[0061] Exemplarily, when the ambient temperature detected by the outdoor temperature detection unit 10 is relatively high, for example, greater than 40°C. The controllable switch 14 is turned on, the condensation structure 100 works, the fan 7 is turned on, the first power pump 1 is turned on, and the second power pump 2 is turned off. Among them, the condensation structure 100 includes a compressor 5, and the compressor 5 is turned on at this time. The coolant in the third pipeline L3 stops circulating, and the coolant in the first pipeline L1 circulates. The coolant output from the first cooling circuit outlet 171 circulates to the first heat exchange pipeline through the first pipeline L1; at the same time, the coolant output from the second cooling circuit outlet 181 is output to the first pipeline L1 through the first connecting pipeline L5, and is merged into the first power pump 1 through the first pipeline L1, and then circulates to the first heat exchange pipeline. The combined coolant in the first heat exchange pipe is cooled by heat exchange through the second heat exchange pipe on the compressor circuit. The cooled coolant enters the second one-way valve 12, and is divided into two paths after passing through the second one-way valve 12, and enters the first cooling circuit inlet 172 of the energy storage device 17 through the second pipeline L2, and enters the second cooling circuit inlet 182 of the energy storage inverter 18 through the second pipeline L2 and the controllable switch 14, so as to cool the energy storage device 17 and the energy storage inverter 18.

[0062] When the ambient temperature detected by the outdoor temperature detection unit 10 is relatively low, for example, greater than or equal to 0°C and less than or equal to 40°C. The controllable switch 14 is turned off, the condensation structure 100 and the dry cooling structure 200 are working, the fan 7 is turned on, the first power pump 1 is turned on, and the second power pump 2 is turned on. Among them, when the condensation structure 100 is working, the compressor 5 can be turned on; when the dry cooling structure 200 is working, the dry cooler 9 can be turned on. The coolant in the third pipeline L3 circulates, and the coolant in the first pipeline L1 circulates. The condensation structure 100 performs condensation cooling for the energy storage device 17, and the dry cooling structure 200 uses the outdoor cold source to perform dry cooling for the energy storage inverter 18, thereby reducing the power consumption of the condensation structure 100 for cooling the energy storage inverter 18.

[0063] When the ambient temperature detected by the outdoor temperature detection unit 10 is very low, for example, less than 0°C. The controllable switch 14 is turned on, the condensation structure 100 does not work, the dry cooling structure 200 works, the fan 7 is turned on, the first power pump 1 is turned off, and the second power pump 2 is turned on. Among them, when the condensation structure 100 does not work, the compressor 5 can be turned off; when the dry cooling structure 200 works, the dry cooler 9 can be turned on. The coolant in the third pipeline L3 circulates, and the coolant in the first pipeline L1 stops circulating. The coolant output from the first cooling circuit outlet 171 merges with the coolant output from the second cooling circuit outlet 181 through the first connecting pipeline L5 and enters the third pipeline L3, and then circulates to the dry cooling structure 200 through the third pipeline L3. The dry cooling structure 200 uses an outdoor cold source to cool the coolant, and is divided into two paths after passing through the fourth pipeline L4 and the first one-way valve 13. One path is output to the second cooling circuit inlet 182 of the energy storage inverter 18, and the other path is output to the first cooling circuit inlet 172 of the energy storage device 17 through the controllable switch 14, so that the dry cooling structure 200 can simultaneously perform dry cooling on the energy storage device 17 and the energy storage inverter 18.

[0064] Continue to refer Figure 1 The energy storage temperature control device also includes a PCS water inlet temperature sensor 16, which is used to detect the coolant temperature at the inlet 182 of the second cooling circuit and form a PCS water inlet temperature signal. The control module can also be connected to the PCS water inlet temperature sensor 16 to obtain the PCS water inlet temperature signal. The control module can also adjust the temperature of the coolant in the second cooling circuit according to the PCS water inlet temperature signal.

[0065] Continue to refer Figure 1 The energy storage temperature control device also includes a battery pack water inlet temperature sensor 15, which is used to detect the coolant temperature at the first cooling circuit inlet 172 and form a battery pack water inlet temperature signal. The control module can also be connected to the battery pack water inlet temperature sensor 15 to obtain the battery pack water inlet temperature signal. The control module can also adjust the temperature of the coolant in the first cooling circuit according to the battery pack water inlet temperature signal.

[0066] Continue to refer Figure 1 The energy storage temperature control device further includes an expansion tank 3, which is arranged on the first connecting pipeline L5 and is used to balance the pressure on the first connecting pipeline L5. The energy storage temperature control device further includes an injection and drainage valve 4, which is arranged on the first pipeline L1 and is used to replenish or discharge the coolant in the liquid cooling circuit.

[0067] An embodiment of the present invention further provides an energy storage temperature control method, which is executed using the energy storage temperature control device provided by any embodiment of the present invention. Figure 2 A schematic diagram of a flow chart of a method for controlling energy storage temperature provided by an embodiment of the present invention. Figure 2 As shown, the method includes:

[0068] S110, obtaining an outdoor temperature signal;

[0069] The energy storage temperature control device may include an outdoor temperature detection unit 10, which may monitor the temperature of the outdoor air and form an outdoor temperature signal. After the outdoor temperature detection unit 10 forms the outdoor temperature signal, the control module acquires the outdoor temperature signal and determines the current temperature of the outdoor air.

[0070] S120, controlling the state of the first cooling circuit and the controllable switch according to the outdoor temperature signal.

[0071] Among them, after determining the current temperature of the outdoor air, the conduction state of the controllable switch 14 and the state of the first cooling circuit can be determined by comparing the current temperature of the outdoor air with the outdoor temperature characteristic value. When the temperature of the outdoor air is relatively high, the first cooling circuit can be controlled to be in a flow state, and the controllable switch 14 is turned on. At this time, the cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage converter 18 are in a parallel operation state. At the same time, the first cooling circuit condenses and cools the cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage converter 18. When the temperature of the outdoor air is relatively low, the outdoor air can provide an outdoor cold source for natural cooling of the energy storage converter 18. At this time, the first cooling circuit can be controlled to be in a flow state, and the controllable switch 14 can be turned off. At this time, the cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage converter 18 are in an independent operation state. The first cooling circuit can condense and cool the cooling circulation loop of the energy storage device 17 according to the coolant temperature required for the operation of the energy storage device 17. The outdoor cold source of outdoor air can be used for dry cooling of the cooling circulation loop of the energy storage inverter 18 through the second cooling loop according to the coolant temperature required for the energy storage inverter 18 to work, so that the energy storage inverter 18 uses the cold source of outdoor air for natural cooling, reducing the cooling time of the first cooling loop and reducing the power consumption of the first cooling loop. When the temperature of the outdoor air is lower, the outdoor cold source provided by the outdoor air can meet the cold source requirements of the energy storage device 17 and the energy storage inverter 18. At this time, the first cooling loop can be controlled to be in a static state, and the controllable switch 14 is turned on. The cooling circulation loop of the energy storage device 17 and the cooling circulation loop of the energy storage inverter 18 are in a parallel operation state, and the outdoor cold source provided by the outdoor air can be used for dry cooling of the cooling circulation loop of the energy storage inverter 18 through the second cooling loop according to the coolant temperature required for the energy storage inverter 18 to work, and at the same time, the cooling circulation loop of the energy storage device 17 is used for dry cooling according to the coolant temperature required for the energy storage device 17 to work. The outdoor cold source provided by the outdoor air is fully utilized to naturally cool the energy storage device 17 and the energy storage converter 18, thereby further reducing the cooling time of the first cooling circuit and reducing the power consumption of the first cooling circuit.

[0072] The technical solution of this embodiment controls the state of the first cooling circuit and the controllable switch 14 through the outdoor temperature signal, and can make full use of the outdoor cold source provided by the outdoor air to cool the energy storage inverter 18 and the energy storage device 17, thereby realizing natural cooling of the energy storage inverter 18 and the energy storage device 17, reducing the cooling time of the first cooling circuit, reducing the power consumption of the first cooling circuit, and thereby reducing the power consumption of the energy storage temperature control device.

[0073] refer to Figure 1The first cooling circuit includes a heat exchanger 6, a condensation structure 100, a first pipeline L1 and a second pipeline L2; the first end a of the first heat exchange pipeline of the heat exchanger 6 is connected to the first cooling circuit outlet 171 through the first pipeline L1, the second end b of the first heat exchange pipeline of the heat exchanger 6 is connected to the first cooling circuit inlet 172 through the second pipeline L2, and the second heat exchange pipeline of the heat exchanger 6 is connected to both ends of the condensation structure 100; the second cooling circuit includes a dry cooling structure 200, a third pipeline L3 and a fourth pipeline L4; the first end of the dry cooling structure 200 is connected to the second cooling circuit outlet 181 through the third pipeline L3, and the second end of the dry cooling structure 200 is connected to the second cooling circuit inlet 182 through the fourth pipeline L4. Figure 3 A schematic diagram of another energy storage temperature control method provided by an embodiment of the present invention. Figure 3 As shown, the method includes:

[0074] S210, obtaining an outdoor temperature signal;

[0075] S220, when the outdoor temperature signal is greater than the first temperature characteristic value, controlling the condensation structure to start according to the outdoor temperature signal, and turning on the controllable switch;

[0076] Among them, the first temperature characteristic value can be set according to the operating temperature of the energy storage inverter 18. The first temperature characteristic value may be less than the maximum operating temperature of the energy storage inverter 18. When the outdoor temperature signal is greater than the first temperature characteristic value, the temperature of the outdoor air may be less than the maximum operating temperature of the energy storage inverter 18. Exemplarily, the operating temperature of the energy storage inverter 18 can be up to 60°C, and the temperature corresponding to the first temperature characteristic value may be 40°C. At this time, the condensation structure 100 can be controlled to start, and the controllable switch 14 can be turned on. The condensation structure 100 performs condensation and cooling for the energy storage device 17 and the energy storage inverter 18.

[0077] S230, when the outdoor temperature signal is less than or equal to the first temperature characteristic value and greater than or equal to the second temperature characteristic value, controlling the condensation structure to start according to the outdoor temperature signal and turning off the controllable switch; wherein the second temperature characteristic value is less than the first temperature characteristic value;

[0078] Among them, the second temperature characteristic value can be set according to the operating temperature of the energy storage device 17. The second temperature characteristic value may be lower than the operating temperature of the energy storage device 17. When the outdoor temperature signal is greater than or equal to the second temperature characteristic value, and less than or equal to the first temperature characteristic value, the outdoor air can provide an outdoor cold source to preferentially perform natural cooling for the energy storage inverter 18. Exemplarily, the operating temperature of the energy storage device 17 may be 25°C, and the temperature corresponding to the second temperature characteristic value may be 0°C. At this time, the condensation structure 100 may be controlled to start, and the controllable switch 14 may be turned off. The condensation structure 100 performs condensation cooling for the energy storage device 17. The dry cooling structure 200 performs dry cooling for the energy storage inverter 18 through an outdoor cold source.

[0079] S240: When the outdoor temperature signal is less than the second temperature characteristic value, the condensation structure is controlled to be closed and the controllable switch is controlled to be turned on according to the outdoor temperature signal.

[0080] Among them, when the outdoor temperature signal is less than the second temperature characteristic value, the outdoor cold source provided by the outdoor air can meet the cooling requirements of the energy storage device 17 and the energy storage converter 18. At this time, the condensation structure 100 can be controlled to be closed, and the controllable switch 14 can be turned on. The outdoor cold source provided by the outdoor air can be used to perform dry cooling for the energy storage converter 18 through the dry cooling structure 200, and dry cooling for the energy storage device 17 at the same time.

[0081] In some embodiments, the energy storage temperature control device includes a fan 7, the condensation structure 100 includes a condenser 8, the dry cooling structure 200 includes a dry cooler 9, and the fan 7 is arranged on one side of the condenser 8 and the dry cooler 9; when the state of the condensation structure and the controllable switch is controlled according to the outdoor temperature signal, it also includes:

[0082] Control the fan to start.

[0083] The fan 7 is arranged on one side of the condenser 8 and the dry cooler 9, and air convection can be formed at the condenser 8 and the dry cooler 9, so that the outdoor air can naturally cool the condenser 8 and the dry cooler 9, reducing the power consumption of the condenser 8. The dry cooler 9 uses the outdoor cold source to cool at least the energy storage inverter 18, realizing the natural cooling of the energy storage inverter 18, making full use of the outdoor cold source provided by the outdoor air, and reducing the power consumption of the energy storage temperature control device.

[0084] In some embodiments, the energy storage temperature control device further includes a first power pump 1 and a second power pump 2, wherein the first power pump 1 is connected to the first pipeline L1, and the second power pump 2 is connected to the third pipeline L3; when the state of the condensation structure and the controllable switch is controlled according to the outdoor temperature signal, it also includes:

[0085] When the outdoor temperature signal is greater than the first temperature characteristic value, the first power pump is controlled to be turned on and the second power pump is turned off according to the outdoor temperature signal;

[0086] When the outdoor temperature signal is greater than the first temperature characteristic value, the condensation structure 100 is started, the controllable switch 14 is turned on, and the first power pump 1 is controlled to be turned on, the second power pump 2 is turned off, and the fan 7 is turned on. The coolant in the third pipeline L3 stops circulating, and the coolant in the first pipeline L1 circulates. The coolant output from the first cooling circuit outlet 171 circulates to the first heat exchange pipeline through the first pipeline L1; at the same time, the coolant output from the second cooling circuit outlet 181 is output to the first pipeline L1 through the first connecting pipeline L5, and circulates to the first heat exchange pipeline through the first pipeline L1. The coolant in the first heat exchange pipeline exchanges heat with the coolant in the second heat exchange pipeline to cool down, and then is output to the first cooling circuit inlet 172 through the second pipeline L2, and is output to the second cooling circuit inlet 182 through the second pipeline L2 and the second connecting pipeline L6, so that the condensation structure 100 can simultaneously condense and cool the energy storage device 17 and the energy storage converter 18. At this time, the fan 7 can provide an outdoor cold source for the condensation structure 100, thereby reducing the power consumption of the condensation structure 100.

[0087] When the outdoor temperature signal is less than or equal to the first temperature characteristic value and greater than or equal to the second temperature characteristic value, the first power pump is controlled to start and the second power pump is controlled to start according to the outdoor temperature signal;

[0088] Among them, when the outdoor temperature signal is less than or equal to the first temperature characteristic value and greater than or equal to the second temperature characteristic value, the condensation structure 100 and the dry cooling structure 200 work, and the controllable switch 14 is turned off. At this time, the first power pump 1 is turned on, the second power pump 2 is turned on, and the fan 7 is turned on. The coolant in the third pipeline L3 circulates, and the coolant in the first pipeline L1 circulates. The condensation structure 100 performs condensation cooling for the energy storage device 17, and the dry cooling structure 200 performs dry cooling for the energy storage inverter 18, which reduces the power consumption of the condensation structure 100 for cooling the energy storage inverter 18. At this time, the outdoor cold source provided by the fan provides an outdoor cold source for the condensation structure 100 and the dry cooling structure 200 at the same time, and the energy storage inverter 18 is naturally cooled through the dry cooling structure 200, reducing the power consumption of the condensation structure 100.

[0089] When the outdoor temperature signal is less than the second temperature characteristic value, the first power pump is controlled to be turned off and the second power pump is controlled to be turned on according to the outdoor temperature signal.

[0090] Among them, when the outdoor temperature signal is less than the second temperature characteristic value, the controllable switch 14 is turned on, the condensation structure 100 does not work, the dry cooling structure 200 works, the first power pump 1 is turned off, the second power pump 2 is turned on, and the fan 7 is turned on. The coolant in the third pipeline L3 circulates, and the coolant in the first pipeline L1 stops circulating. The coolant output from the second cooling circuit outlet 181 merges with the coolant output from the first cooling circuit outlet 171 in the third pipeline L3 through the first connecting pipeline L5, and circulates to the dry cooling structure 200. The fan 7 provides an outdoor cold source to the dry cooling structure 200, and the dry cooling structure 200 uses the outdoor cold source to cool the coolant, and after passing through the fourth pipeline L4, it is divided into two paths, one path is output to the second cooling circuit inlet 182, and the other path is output to the first cooling circuit inlet 172 through the second connecting pipeline L6, so that the dry cooling structure 200 can simultaneously perform dry cooling on the energy storage device 17 and the energy storage converter 18.

[0091] An embodiment of the present invention further provides an energy storage system. The energy storage system includes an energy storage device, an energy storage converter, and an energy storage temperature control device provided by any embodiment of the present invention; a first cooling circuit in the energy storage temperature control device is arranged around the energy storage device, a second cooling circuit in the energy storage temperature control device is arranged around the energy storage converter, and the energy storage temperature control device is used to control the temperature of the energy storage device and the energy storage converter.

[0092] Specifically, the first cooling circuit may include a first water inlet pipe, a first water outlet pipe, and a liquid cooling pipeline arranged around the energy storage device. The second cooling circuit may include a second water inlet pipe, a second water outlet pipe, and a liquid cooling pipeline arranged around the energy storage converter. By setting the inlet of the first cooling circuit to be connected to the first water inlet pipe, the outlet of the first cooling circuit to be connected to the first water outlet pipe, the inlet of the second cooling circuit to be connected to the second water inlet pipe, and the outlet of the second cooling circuit to be connected to the second water outlet pipe, the temperature of the coolant in the liquid cooling circuit of the energy storage device can be controlled by the energy storage temperature control device to control the temperature of the energy storage device. At the same time, the temperature of the coolant in the second cooling circuit is controlled to control the temperature of the energy storage converter.

[0093] Since the energy storage system includes the energy storage temperature control device provided by any embodiment of the present invention, it has the same beneficial effects as the energy storage temperature control device provided by any embodiment of the present invention, which will not be repeated here.

[0094] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An energy storage temperature control device, characterized in that: It includes a first cooling circuit, a second cooling circuit, a first connecting pipeline, a second connecting pipeline and a controllable switch; The first cooling circuit is connected to the energy storage device for cooling the energy storage device; the second cooling circuit is connected to the energy storage inverter for cooling the energy storage inverter; the first connecting pipeline is connected between the first cooling circuit outlet and the second cooling circuit outlet, the second connecting pipeline is connected between the first cooling circuit inlet and the second cooling circuit inlet, and the controllable switch is arranged on the second connecting pipeline for controlling the connection state of the second connecting pipeline.

2. The energy storage temperature control device according to claim 1, characterized in that: The first cooling circuit includes a heat exchanger, a condensation structure, a first pipeline and a second pipeline; The first end of the first heat exchange pipe of the heat exchanger is connected to the outlet of the first cooling circuit through the first pipe, the second end of the first heat exchange pipe of the heat exchanger is connected to the inlet of the first cooling circuit through the second pipe, and the second heat exchange pipe of the heat exchanger is connected to both ends of the condensation structure; The second cooling circuit includes a dry cooling structure, a third pipeline and a fourth pipeline; the first end of the dry cooling structure is connected to the outlet of the second cooling circuit through the third pipeline, and the second end of the dry cooling structure is connected to the inlet of the second cooling circuit through the fourth pipeline.

3. The energy storage temperature control device according to claim 2, characterized in that: It also includes a fan; the condensation structure includes a condenser, the dry cooling structure includes a dry cooler, the fan is arranged on one side of the condenser and the dry cooler, and the fan is used to provide outdoor air for the condenser and the dry cooler.

4. The energy storage temperature control device according to claim 3, characterized in that: The condenser and the dry cooler are stacked, and the fan is arranged on a side of the condenser away from the dry cooler.

5. The energy storage temperature control device according to claim 3, characterized in that: Also includes a control unit and an outdoor temperature detection unit; The outdoor temperature detection unit is arranged on a side of the condenser and the dry cooler away from the fan, and the outdoor temperature detection unit is used to detect the temperature of the outdoor air and form an outdoor temperature signal; the control unit is connected to the outdoor temperature detection unit, and the controllable switch and the condensation structure are connected to the control unit, and the control unit is used to control the state of the controllable switch and the condensation structure according to the outdoor temperature signal.

6. A method for controlling energy storage temperature, performed by using an energy storage temperature control device according to any one of claims 1 to 5, characterized in that: The method comprises: Get outdoor temperature signal; The states of the first cooling circuit and the controllable switch are controlled according to the outdoor temperature signal.

7. The energy storage temperature control method according to claim 6, characterized in that: The first cooling circuit includes a heat exchanger, a condensing structure, a first pipeline, and a second pipeline; the first end of the first heat exchange pipeline of the heat exchanger is connected to the outlet of the first cooling circuit through the first pipeline, the second end of the first heat exchange pipeline of the heat exchanger is connected to the inlet of the first cooling circuit through the second pipeline, and the second heat exchange pipeline of the heat exchanger is connected to both ends of the condensing structure; the second cooling circuit includes a dry cooling structure, a third pipeline and a fourth pipeline; the first end of the dry cooling structure is connected to the outlet of the second cooling circuit through the third pipeline, and the second end of the dry cooling structure is connected to the inlet of the second cooling circuit through the fourth pipeline; Controlling the state of the first cooling circuit and the controllable switch according to the outdoor temperature signal includes: When the outdoor temperature signal is greater than a first temperature characteristic value, the condensation structure is controlled to start according to the outdoor temperature signal, and the controllable switch is turned on; When the outdoor temperature signal is less than or equal to the first temperature characteristic value and greater than or equal to the second temperature characteristic value, the condensation structure is controlled to start according to the outdoor temperature signal, and the controllable switch is turned off; wherein the second temperature characteristic value is less than the first temperature characteristic value; When the outdoor temperature signal is less than a second temperature characteristic value, the condensation structure is controlled to be closed and the controllable switch is turned on according to the outdoor temperature signal.

8. The energy storage temperature control method according to claim 7, characterized in that: The energy storage temperature control device includes a fan, the condensation structure includes a condenser, the dry cooling structure includes a dry cooler, and the fan is arranged on one side of the condenser and the dry cooler; when the state of the condensation structure and the controllable switch is controlled according to the outdoor temperature signal, it also includes: Control the fan to start.

9. The energy storage temperature control method according to claim 7 or 8, characterized in that: The energy storage temperature control device further includes a first power pump and a second power pump, wherein the first power pump is connected to the first pipeline, and the second power pump is connected to the third pipeline; when the state of the condensation structure and the controllable switch is controlled according to the outdoor temperature signal, it also includes: When the outdoor temperature signal is greater than a first temperature characteristic value, the first power pump is controlled to be turned on and the second power pump is controlled to be turned off according to the outdoor temperature signal; When the outdoor temperature signal is less than or equal to the first temperature characteristic value and greater than or equal to the second temperature characteristic value, the first power pump is controlled to be turned on and the second power pump is controlled to be turned on according to the outdoor temperature signal; When the outdoor temperature signal is less than a second temperature characteristic value, the first power pump is controlled to be turned off and the second power pump is controlled to be turned on according to the outdoor temperature signal.

10. An energy storage system, characterized in that: It comprises an energy storage device, an energy storage inverter and the energy storage temperature control device according to any one of claims 1 to 5; a first cooling circuit in the energy storage temperature control device is arranged around the energy storage device, a second cooling circuit in the energy storage temperature control device is arranged around the energy storage inverter, and the energy storage temperature control device is used to control the temperature of the energy storage device and the energy storage inverter.

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