Liquid cooling unit and energy storage cabinet

Abstract

The utility model provides a liquid cooling unit and an energy storage cabinet. The liquid cooling unit comprises a first circulation loop, a second circulation loop, a refrigeration module, a first plate heat exchanger and a second plate heat exchanger. The first circulation loop is suitable for being connected to a battery module, and a first refrigerating medium circulates in the first circulation loop; the second circulation loop is suitable for being connected to the converter, and a second refrigerating medium circulates in the second circulation loop; the refrigeration module comprises a refrigeration mechanism and a third circulation loop connected to the refrigeration mechanism, and a refrigerant circulates in the third circulation loop; the first plate heat exchanger is arranged between a first position of the first circulation loop and a second position of the third circulation loop; the second plate heat exchanger is arranged between the third position of the second circulation loop and one of the fourth position of the first circulation loop and the fifth position of the third circulation loop; wherein in the circulation direction of the first refrigerating medium, the first position is located on the downstream of the fourth position, and in the circulation direction of the refrigerating medium, the second position is located on the upstream of the fifth position.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a liquid cooling unit and an energy storage cabinet. Background Art

[0002] In the existing design of energy storage cabinets, the energy storage inverter (Power Conversion System, PCS) installed in the energy storage cabinet will generate heat when working, and the device will be damaged when the temperature exceeds a certain temperature. In order to solve the above problems, a fan is used in an existing solution to cool the energy storage inverter. However, the above cooling method has disadvantages such as low energy efficiency and high noise. In this regard, another existing solution uses a refrigeration module of a liquid cooling unit to directly cool the energy storage inverter. Specifically, the refrigeration module and the energy storage inverter are connected through a pipeline for heat exchange, and the heat exchange between the refrigerant and the coolant in the pipeline is used to realize the heat transfer of the energy storage inverter. In this way, there is no need to additionally arrange a fan for air cooling the energy storage inverter, which is beneficial to reduce energy consumption and noise. However, since the temperature of the refrigerant in the refrigeration module is relatively low, that is, the temperature difference between the refrigerant and the energy storage inverter (equivalent to the temperature difference between the refrigerant and the coolant) is large, the energy storage inverter is prone to condensation due to the temperature of the incoming coolant being lower than the ambient temperature, causing damage to the chip of the energy storage inverter and affecting the normal operation of the liquid cooling unit. Utility Model Content

[0003] A main purpose of the utility model is to overcome at least one defect of the above-mentioned prior art and provide a liquid cooling unit with high energy efficiency, low noise and converter that is not prone to condensation.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] According to one aspect of the utility model, a liquid cooling unit is provided, which includes a first circulation loop, a second circulation loop, a refrigeration module, a first plate heat exchanger and a second plate heat exchanger; the first circulation loop is suitable for connecting to a battery module and realizing heat exchange cooling of the battery module, and a first refrigerant flows inside the first circulation loop; the second circulation loop is suitable for connecting to an inverter and realizing heat exchange cooling of the inverter, and a second refrigerant flows inside the second circulation loop; the refrigeration module includes a refrigeration mechanism and a third circulation loop connected to the refrigeration mechanism, and a refrigerant flows inside the third circulation loop; the first plate heat exchanger includes two heat exchange channels, one of which is connected to a first position of the first circulation loop and serves as a part of the first circulation loop , wherein the other heat exchange channel is connected to the second position of the third circulation loop as a part of the third circulation loop; the second plate heat exchanger includes two heat exchange channels, one of which is connected to the third position of the second circulation loop as a part of the second circulation loop, wherein the other heat exchange channel is connected to the fourth position of the first circulation loop as a part of the first circulation loop, or is connected to the fifth position of the third circulation loop as a part of the third circulation loop; wherein, along the direction from the inlet to the outlet of the first circulation loop, the first position is located downstream of the fourth position, and along the direction from the inlet to the outlet of the third circulation loop, the second position is located upstream of the fifth position.

[0006] According to one embodiment of the utility model, a bypass branch is provided on the second circulation loop, and the connection points of the two ends of the bypass branch with the second circulation loop are respectively located at the two ends of the heat exchange channel of the second plate heat exchanger, so that the bypass branch and the heat exchange channel of the second plate heat exchanger connected to the second circulation loop are arranged in parallel relative to each other, and a control valve is provided on the bypass branch; wherein the liquid cooling unit is configured to: when the temperature of the second coolant flowing from the second plate heat exchanger to the inverter is less than or equal to a lower temperature threshold, the control valve is controlled to open.

[0007] According to one embodiment of the utility model, a water pump is provided on the second circulation loop, which is located upstream of the third position; wherein the connection between one end of the bypass branch and the second circulation loop is located between the water pump and the second plate heat exchanger.

[0008] According to one embodiment of the utility model, the second circulation loop is connected to a temperature sensor, which is suitable for collecting temperature information of the second coolant, and the connection between at least one of the temperature sensors and the second circulation loop is located between the third position and the outlet of the second circulation loop.

[0009] According to one of the embodiments of the utility model, wherein: a water pump is provided on the first circulation loop, which is located upstream of the fourth position; and / or, an expansion tank is provided on the first circulation loop, which is located upstream of the fourth position; and / or, a filter is provided on the first circulation loop, which is located upstream of the fourth position; and / or, a water replenishment valve is provided on the first circulation loop, which is located upstream of the fourth position; and / or, a heater is provided on the first circulation loop, which is located downstream of the first position.

[0010] According to one embodiment of the utility model, wherein: a water pump is provided on the second circulation loop, which is located upstream of the third position; and / or, an expansion tank is provided on the second circulation loop, which is located upstream of the third position; and / or, a filter is provided on the second circulation loop, which is located upstream of the third position; and / or, a water replenishment valve is provided on the second circulation loop, which is located upstream of the third position.

[0011] According to one embodiment of the present utility model, the refrigeration mechanism includes a condenser, and two ends of the third circulation loop are respectively connected to the inlet and outlet of the condenser.

[0012] According to one embodiment of the present utility model, wherein: a compressor is provided on the third circulation loop, and the compressor is located between the fifth position and the condenser; and / or the refrigeration mechanism further includes a fan, and the fan is adjacent to the condenser.

[0013] According to one of the embodiments of the utility model, wherein: a liquid reservoir and a charging valve are provided on the third circulation loop, the liquid reservoir is located between the refrigeration mechanism and the second position, and the charging valve is located between the refrigeration mechanism and the liquid reservoir; and / or a filter is provided on the third circulation loop, which is located upstream of the second position; and / or an expansion valve is provided on the third circulation loop, which is located upstream of the second position; and / or a detection valve is provided on the third circulation loop, which is located downstream of the fifth position.

[0014] According to one embodiment of the utility model, wherein: the first circulation loop is connected with a temperature sensor, which is suitable for collecting temperature information of the first coolant; and / or, the second circulation loop is connected with a temperature sensor, which is suitable for collecting temperature information of the second coolant; and / or, the third circulation loop is connected with a temperature sensor, which is suitable for collecting temperature information of the refrigerant.

[0015] According to one of the embodiments of the utility model, wherein: the first circulation loop is connected to a pressure sensor, which is suitable for collecting pipeline pressure information of the first circulation loop; and / or, the second circulation loop is connected to a pressure sensor, which is suitable for collecting pipeline pressure information of the second circulation loop; and / or, the third circulation loop is connected to a pressure sensor, which is suitable for collecting pipeline pressure information of the third circulation loop.

[0016] According to one embodiment of the present utility model, wherein: the first coolant is water; and / or, the second coolant is water; and / or, the refrigerant is fluorine.

[0017] It can be seen from the above technical solution that the advantages and positive effects of the liquid cooling unit proposed by the utility model are:

[0018] The liquid cooling unit proposed in the utility model includes a first and a second circulation loop, a refrigeration module, a first and a second plate heat exchanger; the first circulation loop is connected to the battery module and flows with a first coolant; the second circulation loop is connected to the converter and flows with a second coolant; the refrigeration module includes a refrigeration mechanism and a third circulation loop connected to the refrigeration mechanism and flows with a coolant; the first plate heat exchanger is arranged between the first position of the first circulation loop and the second position of the third circulation loop; the second plate heat exchanger is arranged between the third position of the second circulation loop and one of the fourth position of the first circulation loop and the fifth position of the third circulation loop; the first position is located downstream of the fourth position, and the second position is located upstream of the fifth position. Through the above design, compared with the existing scheme of air cooling and cooling the converter, the utility model uses the refrigeration module to heat exchange and cool the converter, and there is no need to additionally set up a fan for cooling the converter, which is conducive to improving energy efficiency, reducing noise, and saving space occupied by arranging fans. On this basis, the utility model utilizes the second refrigerant to absorb heat from the inverter, and the heat release side of the second refrigerant exchanges heat with the first refrigerant, or exchanges heat with the refrigerant that has been heated up by the first refrigerant. Accordingly, the utility model can avoid the inverter temperature being too low and making it less likely to produce condensation, thereby ensuring the normal operation of the inverter, improving system safety, and having higher heat exchange efficiency.

[0019] Another main purpose of the present invention is to overcome at least one defect of the above-mentioned prior art and provide an energy storage cabinet using the above-mentioned liquid cooling unit.

[0020] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0021] According to another aspect of the present invention, an energy storage cabinet is provided, which includes the liquid cooling unit proposed in the present invention and described in the above embodiments.

[0022] It can be seen from the above technical solutions that the advantages and positive effects of the energy storage cabinet proposed by the utility model are:

[0023] The energy storage cabinet proposed in the utility model can prevent the temperature of the inverter from being too low and making it difficult for condensation to occur on the basis of realizing the cooling function of the inverter by adopting the liquid cooling unit proposed in the utility model, thereby ensuring the normal operation of the inverter, improving the system safety, and having high heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The various objects, features and advantages of the present invention will become more apparent by considering the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are only exemplary illustrations of the present invention and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts. Among them:

[0025] Figure 1 is a system schematic diagram of a liquid cooling unit according to an exemplary embodiment;

[0026] Figures 2 to 4 They are system schematic diagrams of liquid cooling units according to several other exemplary embodiments.

[0027] The following are the descriptions of the reference numerals:

[0028] 100. First circulation loop; 302. Filling valve;

[0029] 101. Water pump; 303. Filter;

[0030] 102. Expansion tank; 304. Expansion valve;

[0031] 103. Filter; 305. Detection valve;

[0032] 104. Water supply valve; 310. Condenser;

[0033] 105. Heater; 320. Compressor;

[0034] 200. Second circulation loop; 330. Fan;

[0035] 201. Water pump; 410. First plate heat exchanger;

[0036] 202. Expansion tank; 420. Second plate heat exchanger;

[0037] 203.Filter; a.First position;

[0038] 204. Water supply valve; b. Second position;

[0039] 210.Bypass branch; c.Third position;

[0040] 211. Control valve; d. Fourth position;

[0041] 300. Third circulation loop; e. Fifth position;

[0042] 301. Liquid reservoir; P1~P3. Pressure sensor;

[0043] T1~T3. Temperature sensor. DETAILED DESCRIPTION

[0044] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present invention.

[0045] In the following description of different exemplary embodiments of the utility model, reference is made to the accompanying drawings, which form a part of the utility model and in which different exemplary structures, systems and steps that can implement multiple aspects of the utility model are shown by way of example. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the utility model. Moreover, although the terms "above", "between", "within", etc. can be used in this specification to describe different exemplary features and elements of the utility model, these terms are used herein only for convenience, such as according to the direction of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the utility model.

[0046] See also Figure 1 , which representatively shows a system schematic diagram of the liquid cooling unit proposed in the present invention. In this exemplary embodiment, the liquid cooling unit proposed in the present invention is described by taking the application in an energy storage cabinet as an example. It is easy for those skilled in the art to understand that in order to apply the relevant design of the present invention to other types of air-conditioning equipment, various modifications, additions, substitutions, deletions or other changes are made to the specific embodiments described below, and these changes are still within the scope of the principle of the liquid cooling unit proposed in the present invention.

[0047] like Figure 1As shown, in one embodiment of the present invention, the liquid cooling unit proposed in the present invention includes a first circulation loop 100, a second circulation loop 200, a refrigeration module, a first plate heat exchanger 410 and a second plate heat exchanger 420. The first circulation loop 100 is suitable for connecting to the battery module, and a first coolant circulates inside the first circulation loop 100, and the first coolant can exchange heat with the battery module to achieve cooling of the battery module. The second circulation loop 200 is suitable for connecting to the converter, and a second coolant circulates inside the second circulation loop 200, and the second coolant can exchange heat with the converter to achieve cooling of the converter. The refrigeration module includes a refrigeration mechanism and a third circulation loop 300 connected to the refrigeration mechanism, and a refrigerant circulates inside the third circulation loop 300. The first plate heat exchanger 410 is arranged between the first circulation loop 100 and the third circulation loop 300, that is, the first plate heat exchanger 410 is suitable for realizing heat exchange between the first refrigerant and the refrigerant. For the convenience of explanation and understanding, in this embodiment, the position where the first plate heat exchanger 410 is arranged in the first circulation loop 100 is defined as the first position a, and the position where the first plate heat exchanger 410 is arranged in the third circulation loop 300 is defined as the second position b, then the first plate heat exchanger 410 is arranged between the first position a of the first circulation loop 100 and the second position b of the third circulation loop 300. The second plate heat exchanger 420 is arranged between the second circulation loop 200 and the first circulation loop 100, that is, the second plate heat exchanger 420 is suitable for realizing heat exchange between the second coolant and the first coolant. For the convenience of description and understanding, in this embodiment, the position where the second plate heat exchanger 420 is arranged in the second circulation loop 200 is defined as the third position c, and the position where the second plate heat exchanger 420 is arranged in the first circulation loop 100 is defined as the fourth position d, then the second plate heat exchanger 420 is arranged between the third position c of the second circulation loop 200 and the fourth position d of the first circulation loop 100. Among them, along the flow direction of the first coolant, the first position a is located downstream of the fourth position d. In other words, after the first coolant flows out from the battery module, it first flows through the second plate heat exchanger 420 and then flows through the first plate heat exchanger 410.

[0048] In one embodiment of the present utility model, the so-called design of "the first plate heat exchanger 410 is arranged between the first position a and the second position b" can be specifically understood as: the first plate heat exchanger 410 includes two heat exchange channels, one of which is connected to the first position a of the first circulation loop 100, so that the heat exchange channel serves as a part of the first circulation loop 100 at the first position a. In addition, the other heat exchange channel is connected to the second position b of the third circulation loop 300, so that the heat exchange channel serves as a part of the third circulation loop 300 at the second position b.

[0049] In one embodiment of the present utility model, the so-called design of "the second plate heat exchanger 420 is arranged between the third position c and one of the fourth position d and the fifth position e" can be specifically understood as: the second plate heat exchanger 420 includes two heat exchange channels, one of which is connected to the third position c of the second circulation loop 200, so that the heat exchange channel is used as a part of the second circulation loop 200 at the third position c. In addition, the other heat exchange channel is connected to the fourth position d of the first circulation loop 100, so that the heat exchange channel is used as a part of the first circulation loop 100 at the fourth position d, or the other heat exchange channel is connected to the fifth position e of the third circulation loop 300, so that the heat exchange channel is used as a part of the third circulation loop 300 at the fifth position e.

[0050] It should be noted that in the specific description of each embodiment of the present specification, the so-called "upstream" and "downstream" are based on the direction order of the medium in the corresponding circuit from the inlet to the outlet of the circuit. For example, the relative relationship between the first position a and the fourth position d can be specifically understood as the direction from the inlet to the outlet of the first circulation loop 100, the first position a is located downstream of the fourth position d, that is, after the first coolant flows in from the battery module through the inlet of the first circulation loop 100, it first flows through the fourth position d and then flows through the first position a. For another example, the relative relationship between the second position b and the fifth position e can be specifically understood as the direction from the inlet to the outlet of the third circulation loop 300, the second position b is located upstream of the fifth position e, that is, after the refrigerant flows in from the refrigeration mechanism (such as the condenser 310) through the inlet of the third circulation loop 300, it first flows through the second position b and then flows through the fifth position e. It should be understood that the description of "upstream" and "downstream" about the relative position relationship of different components or positions in the following embodiments can be understood with reference to the direction order from the inlet to the outlet of the circuit where the component or position is located.

[0051] See also Figure 2 , Figure 2 Detailed description of the drawings is given in FIG. 1 , which is a system schematic diagram of another exemplary embodiment of a liquid cooling unit that can embody the principles of the present invention.

[0052] like Figure 2As shown, in one embodiment of the present invention, a bypass branch 210 may be provided on the second circulation loop 200, and the connection points of the two ends of the bypass branch 210 with the second circulation loop 200 are respectively located at the two ends of the heat exchange flow channel of the second plate heat exchanger 420, that is, the bypass branch 210 and the second plate heat exchanger 420 are connected to the heat exchange flow channel of the second circulation loop 200 in a relatively parallel pipeline arrangement, and a control valve 211 is provided on the bypass branch 210. For example, the control valve 211 can be a solenoid valve. Accordingly, the liquid cooling unit proposed in the present invention is configured as follows: when the temperature of the second coolant flowing from the second plate heat exchanger 420 to the converter is less than or equal to a lower temperature threshold, the control valve 211 is controlled to open. Among them, the above-mentioned lower temperature threshold can be greater than or equal to the ambient temperature. For example, when the ambient temperature range of the equipment is 10°C to 40°C, the lower temperature threshold can be set to above 40°C, such as 40°C, 45°C, etc. Accordingly, when the ambient temperature changes between 10°C and 40°C, the utility model can still ensure that an effective anti-condensation function is provided via the bypass branch 210, while avoiding frequent adjustment of the lower temperature threshold, thereby improving the user experience. The temperature of the second coolant can be collected and fed back to the control system via the temperature sensor T2 provided on the second circulation loop 200. Through the above design, the utility model can prevent the temperature of the second coolant flowing to the converter from being lower than the ambient temperature, thereby ensuring that condensation does not occur in the converter.

[0053] like Figure 2 As shown, based on the design that the bypass branch 210 is provided on the second circulation loop 200, in one embodiment of the utility model, a water pump 201 may be provided on the second circulation loop 200, and the water pump 201 is located upstream of the third position c. On this basis, the connection between one end of the bypass branch 210 and the second circulation loop 200 may be located between the water pump 201 and the second plate heat exchanger 420. Through the above design, when the second coolant flows in the heat exchange flow channel or the bypass branch 210 of the second plate heat exchanger 420, the utility model can use a water pump 201 to respectively meet the pumping drive of the second coolant in the above two circulation modes, which is conducive to reducing the number of parts, reducing costs, and reducing structural complexity.

[0054] like Figure 2As shown, based on the design that the bypass branch 210 is provided on the second circulation loop 200, in one embodiment of the utility model, the second circulation loop 200 may be connected to a temperature sensor T2, and the temperature sensor T2 is suitable for collecting the temperature information of the second coolant. Among them, the connection point between at least one temperature sensor T2 and the second circulation loop may be located between the third position c and the outlet of the second circulation loop 200. Through the above design, the utility model can use the temperature sensor T2 to accurately collect the temperature of the second coolant after heat exchange and cooling through the second plate heat exchanger 420, further improve the accuracy and sensitivity of the feedback control of the control valve 211 of the bypass loop 210, and further ensure that the converter will not have condensation.

[0055] See also Figure 3 , Figure 3 Detailed description of the drawings is given in FIG. 1 , which is a system schematic diagram of another exemplary embodiment of a liquid cooling unit that can embody the principles of the present invention.

[0056] Different from Figure 1 or Figure 2 In the embodiment shown, the second plate heat exchanger 420 is configured between the third position c and the fourth position d. Figure 3 As shown, in one embodiment of the utility model, the second plate heat exchanger 420 can also be arranged between the second circulation loop 200 and the third circulation loop 300, that is, the second plate heat exchanger 420 is suitable for realizing heat exchange between the second coolant and the refrigerant. For the convenience of explanation and understanding, in this embodiment, the position where the second plate heat exchanger 420 is arranged in the third circulation loop 300 is defined as the fifth position e, and the second plate heat exchanger 420 is arranged between the third position c of the second circulation loop 200 and the fifth position e of the third circulation loop 300. Among them, along the flow direction of the refrigerant, the second position b is located upstream of the fifth position e. In other words, after the refrigerant flows out from the refrigeration mechanism, it first flows through the first plate heat exchanger 410 and then flows through the second plate heat exchanger 420. Accordingly, the temperature of the refrigerant rises after heat exchange with the first coolant, and then the refrigerant with a higher temperature exchanges heat with the second coolant, which can avoid the second coolant from cooling too low, thereby avoiding condensation of the converter.

[0057] See also Figure 4 , Figure 4 Detailed description of the drawings is given in FIG. 1 , which is a system schematic diagram of another exemplary embodiment of a liquid cooling unit that can embody the principles of the present invention.

[0058] like Figure 4 As shown, in one embodiment of the present invention, when the second plate heat exchanger 420 can also be arranged between the second circulation loop 200 and the third circulation loop 300 , a bypass branch 210 can also be provided on the second circulation loop 200 .

[0059] As mentioned above, in various possible embodiments consistent with the design concept of the present invention, the second plate heat exchanger 420 can be arranged between the second circulation loop 200 and one of the first circulation loop 100 and the third circulation loop 300, that is, the second plate heat exchanger 420 is suitable for realizing heat exchange between the second refrigerant and one of the first refrigerant and the refrigerant, wherein the second plate heat exchanger 420 is arranged between the third position c of the second circulation loop 200 and one of the fourth position d of the first circulation loop 100 and the fifth position e of the third circulation loop 300.

[0060] Through the above design, the energy storage cabinet proposed by the utility model has at least the following advantages and positive effects:

[0061] 1. The first coolant has a higher temperature than the coolant when not exchanging heat with the coolant. At this time, the first coolant is used to exchange heat with the second coolant to avoid the second coolant from cooling too low, thereby avoiding condensation in the converter.

[0062] 2. The first coolant exchanges heat with the second coolant and then exchanges heat with the coolant, which can ensure the cooling needs of the battery module. The first coolant used for heat exchange with the battery module is first heated by the second coolant used for heat exchange with the inverter, thereby increasing the evaporation temperature on the coolant side and improving the energy efficiency of the entire machine.

[0063] 3. The converter adopts liquid cooling, which can realize the fully enclosed design of the converter without contact with the outside air, thereby improving the protection level of the converter and making it more conducive to use in harsh environments. In addition, the converter adopts liquid cooling, which can further reduce the size of the converter, allowing the client to use a smaller cabinet, making the cost of the entire cabinet lower.

[0064] 4. Compared with the existing solution of using fans to cool the converter, the utility model saves the fans used to dissipate heat from the converter, greatly reduces the power consumption of the fans required for converter heat dissipation, saves the cost of the fans, and avoids the loud noise caused by the fans set to dissipate heat from the converter, thereby reducing the overall noise of the energy storage cabinet and improving the customer experience. Furthermore, compared with the fan life of about 5 years, the silicon carbide bearings of the water pump and other components can be maintenance-free for more than 10 years, which is more convenient for customers. In addition, the protection level of existing fans is usually IP54, while the protection level of water pumps can reach IP68, and the protection level of the components is higher.

[0065] like Figure 1 or Figure 2 As shown, in one embodiment of the present invention, a water pump 101 may be provided on the first circulation loop 100, and the water pump 101 is located at the first position a (at Figure 3or Figure 4 In the example, the water pump 101 may be upstream of the fourth position d), and the water pump 101 may provide a driving force to allow the first brine to flow in the first circulation loop 100 .

[0066] like Figure 1 or Figure 2 As shown, in one embodiment of the present invention, an expansion tank 102 may be provided on the first circulation loop 100, and the expansion tank 102 is located at the first position a (at Figure 3 or Figure 4 In the embodiment, it may be upstream of the fourth position d).

[0067] like Figure 1 or Figure 2 As shown, in one embodiment of the present invention, a filter 103 may be provided on the first circulation loop 100, and the filter 103 is located at the first position a (at Figure 3 or Figure 4 In the embodiment, the filter 103 may be upstream of the fourth position d), and the filter 103 may filter impurities in the first coolant flowing therethrough. Further, the filter 103 may be, but is not limited to, a Y-type filter.

[0068] like Figure 1 or Figure 2 As shown, in one embodiment of the present invention, a water supply valve 104 may be provided on the first circulation loop 100, and the water supply valve 104 is located at the first position a (at Figure 3 or Figure 4 In the embodiment, the water supply valve 104 can be upstream of the fourth position d), and can be opened to supply the first coolant when the pipeline pressure of the first circulation loop 100 is lower than a threshold. The pipeline pressure of the first circulation loop 100 can be collected via a pressure sensor P1 disposed on the first circulation loop 100 and fed back to the control system.

[0069] like Figure 1 or Figure 2 As shown, in one embodiment of the present invention, a heater 105 may be provided on the first circulation loop 100, and the heater 105 is located downstream of the first position a. The heater 105 can heat the first refrigerant in the first circulation pipeline after the first plate heat exchanger 410 exchanges heat with the refrigerant. Furthermore, the heater 105 may be, but is not limited to, a PTC heater.

[0070] like Figures 1 to 4 As shown in any one of the embodiments of the present invention, a water pump 201 may be provided on the second circulation loop 200 . The water pump 201 is located upstream of the third position c. The water pump 201 can provide a driving force to allow the second coolant to flow in the second circulation loop 200 .

[0071] like Figures 1 to 4 As shown in any one of the embodiments of the present invention, an expansion tank 202 may be provided on the second circulation loop 200, and the expansion tank 202 is located upstream of the third position c.

[0072] like Figures 1 to 4 As shown in any one, in one embodiment of the present invention, a filter 203 may be provided on the second circulation loop 200, and the filter 203 is located upstream of the third position c, and the filter 203 can filter impurities in the second coolant flowing therethrough. Further, the filter 203 may be, but is not limited to, a Y-type filter.

[0073] like Figures 1 to 4 As shown in any one, in one embodiment of the present utility model, a water replenishment valve 204 may be provided on the second circulation loop 200, and the water replenishment valve 204 is located upstream of the third position c. The water replenishment valve 204 can be opened to replenish the second coolant when the pipeline pressure of the second circulation loop 200 is lower than a threshold value. The pipeline pressure of the second circulation loop 200 can be collected via a pressure sensor P2 provided on the second circulation loop 200 and fed back to the control system.

[0074] like Figures 1 to 4 As shown in any one, in one embodiment of the present utility model, the refrigeration mechanism may include a condenser 310, and the two ends of the third circulation loop 300 are respectively connected to the inlet and outlet of the condenser 310. For example, the refrigerant circulating in the third circulation loop 300 may be fluorine, and at this time, the third circulation loop 300 of the shaft rod in this embodiment adopts a single cooling electric heating form. It should be understood that in some embodiments, the fluorine side (i.e., the third circulation loop 300) may also adopt other forms, such as but not limited to heat pumps, single cooling without electric heating, etc., and is not limited to this embodiment.

[0075] like Figure 1 or Figure 2 As shown, based on the design that the refrigeration mechanism includes a condenser 310, in one embodiment of the present utility model, a compressor 320 may be provided on the third circulation loop 300, and the compressor 320 is located between the condenser 310 and the second position b (at Figure 3 or Figure 4 In the middle, it can be between the fifth position e).

[0076] like Figures 1 to 4 As shown in any one of the figures, based on the design that the refrigeration mechanism includes the condenser 310 , in one embodiment of the present utility model, the refrigeration mechanism may further include a fan 330 , and the fan 330 is disposed adjacent to the condenser 310 .

[0077] like Figures 1 to 4As shown in any one, based on the design that the refrigeration mechanism includes a condenser 310, in one embodiment of the utility model, a liquid reservoir 301 and a charging valve 302 may be provided on the third circulation loop 300, the liquid reservoir 301 is located between the condenser 310 and the second position b, and the charging valve 302 is located between the condenser 310 and the liquid reservoir 301. Through the above design, the utility model can use the liquid reservoir 301 to increase the operating range of the unit and adapt to higher and lower ambient temperatures.

[0078] like Figures 1 to 4 As shown in any one of the embodiments of the present invention, a filter 303 may be provided on the third circulation loop 300. The filter 303 is located upstream of the second position b. The filter 303 can filter impurities in the refrigerant flowing through the third circulation loop.

[0079] like Figures 1 to 4 As shown in any one embodiment of the present utility model, an expansion valve 304 may be provided on the third circulation loop 300, and the expansion valve 304 is located upstream of the second position b. For example, the expansion valve 304 may be an electronic expansion valve.

[0080] like Figures 1 to 4 As shown in any one of the embodiments of the present invention, a detection valve 305 may be provided on the third circulation loop 300, and the detection valve 305 is located downstream of the fifth position e.

[0081] like Figures 1 to 4 As shown in any one, in one embodiment of the present invention, the first circulation loop 100 may be connected to a temperature sensor T1, which is suitable for collecting temperature information of the first coolant and feeding it back to the control system. For example, the first circulation loop 100 may be provided with temperature sensors T1 at its inlet and outlet, respectively, to collect the inlet and outlet liquid temperatures of the first coolant, respectively.

[0082] like Figures 1 to 4 As shown in any one, in one embodiment of the present invention, the second circulation loop 200 may be connected to a temperature sensor T2, which is suitable for collecting temperature information of the second coolant and feeding it back to the control system. For example, the second circulation loop 200 may be provided with temperature sensors T2 at its inlet and outlet, respectively, to collect the inlet and outlet liquid temperatures of the second coolant, respectively.

[0083] like Figures 1 to 4As shown in any one, in one embodiment of the present utility model, the third circulation loop 300 may be connected to a temperature sensor T3, which is suitable for collecting temperature information of the refrigerant and can be fed back to the control system. For example, when the refrigeration mechanism includes a condenser 310 and a compressor 320, the third circulation loop 300 may be provided with a temperature sensor T3 at at least two positions, one of which is located upstream of the compressor 320, and the other is located between the compressor 320 and the condenser 310.

[0084] like Figures 1 to 4 As shown in any one, in one embodiment of the present invention, the first circulation loop 100 may be connected to a pressure sensor P1, and the pressure sensor P1 is suitable for collecting pipeline pressure information of the first circulation loop 100. For example, the first circulation loop 100 may be provided with pressure sensors P1 at its inlet and outlet, respectively, and the inlet and outlet pressures of the first circulation loop 100 are collected accordingly.

[0085] like Figures 1 to 4 As shown in any one, in one embodiment of the present invention, the second circulation loop 200 may be connected to a pressure sensor P2, and the pressure sensor P2 is suitable for collecting pipeline pressure information of the second circulation loop 200. For example, the second circulation loop 200 may be provided with pressure sensors P2 at its inlet and outlet, respectively, and the inlet and outlet pressures of the second circulation loop 200 are collected accordingly.

[0086] like Figures 1 to 4 As shown in any one, in one embodiment of the present utility model, the third circulation loop 300 may be connected to a pressure sensor P3, and the pressure sensor P3 is suitable for collecting pipeline pressure information of the third circulation loop 300. For example, when the refrigeration mechanism includes a condenser 310 and a compressor 320, the third circulation loop 300 may be provided with a pressure sensor P3 at at least two positions, one of which is located upstream of the compressor 320, and the other is located between the compressor 320 and the condenser 310.

[0087] In one embodiment of the present invention, the first coolant may be water.

[0088] In one embodiment of the present invention, the second coolant may be water.

[0089] In one embodiment of the present invention, the refrigerant may be fluorine.

[0090] It should be noted that the liquid cooling units shown in the drawings and described in this specification are only a few examples of the many types of liquid cooling units that can adopt the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the liquid cooling units shown in the drawings or described in this specification.

[0091] In summary, the liquid cooling unit proposed in the utility model includes the first and second circulation loops 200, a refrigeration module, and the first and second plate heat exchangers 420; the first circulation loop 100 is connected to the battery module and flows with the first coolant; the second circulation loop 200 is connected to the inverter and flows with the second coolant; the refrigeration module includes a refrigeration mechanism and a third circulation loop 300 connected to the refrigeration mechanism and flows with the coolant; the first plate heat exchanger 410 is arranged between the first position a of the first circulation loop 100 and the second position b of the third circulation loop 300; the second plate heat exchanger 420 is arranged between the third position c of the second circulation loop 200 and one of the fourth position d of the first circulation loop 100 and the fifth position e of the third circulation loop 300; the first position a is located downstream of the fourth position d, and the second position b is located upstream of the fifth position e. Through the above design, compared with the existing solution of air cooling the converter, the utility model uses a refrigeration module to perform heat exchange and cooling on the converter, and there is no need to set up an additional fan to cool the converter, which is conducive to improving energy efficiency, reducing noise, and saving space occupied by the fan. On this basis, the utility model uses the second coolant to absorb heat and exchange heat with the converter, and the heat release side of the second coolant exchanges heat with the first coolant, or exchanges heat with the refrigerant that has been heated by the first coolant. Accordingly, the utility model can avoid the converter temperature being too low and making it less likely to produce condensation, ensure the normal operation of the converter, improve system safety, and have a higher heat exchange efficiency.

[0092] Based on the above detailed description of several exemplary embodiments of the liquid cooling unit proposed in the present invention, an exemplary embodiment of the energy storage cabinet proposed in the present invention will be described below.

[0093] In one embodiment of the present invention, the energy storage cabinet provided by the present invention includes a liquid cooling unit provided by the present invention and described in detail in the above embodiments.

[0094] It should be noted that the energy storage cabinets shown in the drawings and described in this specification are only a few examples of the many types of energy storage cabinets that can adopt the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the energy storage cabinets shown in the drawings or described in this specification.

[0095] In summary, the energy storage cabinet proposed in the utility model, by adopting the liquid cooling unit proposed in the utility model, can avoid the temperature of the inverter being too low and making it difficult for condensation to occur on the basis of realizing the cooling function of the inverter, thereby ensuring the normal operation of the inverter, improving the system safety, and having high heat exchange efficiency.

[0096] The above describes and / or illustrates in detail the exemplary embodiments of the liquid cooling unit and energy storage cabinet proposed by the utility model. However, the embodiments of the utility model are not limited to the specific embodiments described here. On the contrary, the components and / or steps of each embodiment can be used independently and separately from other components and / or steps described here. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated here, the terms "one", "one" and "above" are used to indicate the presence of one or more elements / components / etc. The terms "comprising", "including" and "having" are used to indicate the meaning of open inclusion and mean that in addition to the listed elements / components / etc., there may be other elements / components / etc. In addition, the terms "first" and "second" in the claims and the specification are used only as marks and are not numerical restrictions on their objects.

[0097] Although the liquid cooling unit and energy storage cabinet proposed in the present invention have been described according to different specific embodiments, those skilled in the art will recognize that the implementation of the present invention may be modified within the spirit and scope of the claims.

Claims

1. A liquid cooling unit, characterized in that: include: A first circulation loop is suitable for connecting to the battery module and realizing heat exchange cooling of the battery module, and a first coolant flows in the first circulation loop; A second circulation loop is suitable for connecting to the converter and realizing heat exchange cooling of the converter, and a second coolant flows in the second circulation loop; A refrigeration module, comprising a refrigeration mechanism and a third circulation loop connected to the refrigeration mechanism, wherein a refrigerant flows inside the third circulation loop; A first plate heat exchanger comprises two heat exchange channels, wherein one of the heat exchange channels is connected to a first position of the first circulation loop and serves as a part of the first circulation loop, and the other of the heat exchange channels is connected to a second position of the third circulation loop and serves as a part of the third circulation loop; and The second plate heat exchanger comprises two heat exchange channels, one of which is connected to the third position of the second circulation loop and serves as a part of the second circulation loop, and the other heat exchange channel is connected to the fourth position of the first circulation loop and serves as a part of the first circulation loop, or is connected to the fifth position of the third circulation loop and serves as a part of the third circulation loop; Among them, along the direction from the inlet to the outlet of the first circulation loop, the first position is located downstream of the fourth position, and along the direction from the inlet to the outlet of the third circulation loop, the second position is located upstream of the fifth position.

2. The liquid cooling unit according to claim 1, characterized in that: A bypass branch is provided on the second circulation loop, and the connection points of the two ends of the bypass branch with the second circulation loop are respectively located at the two ends of the heat exchange channel of the second plate heat exchanger, so that the bypass branch and the heat exchange channel of the second plate heat exchanger connected to the second circulation loop are arranged in parallel relative to each other, and a control valve is provided on the bypass branch; wherein the liquid cooling unit is configured to: when the temperature of the second coolant flowing from the second plate heat exchanger to the inverter is less than or equal to a lower temperature threshold, the control valve is controlled to open.

3. The liquid cooling unit according to claim 2, characterized in that: The second circulation loop is provided with a water pump, which is located upstream of the third position; wherein the connection between one end of the bypass branch and the second circulation loop is located between the water pump and the second plate heat exchanger.

4. The liquid cooling unit according to claim 2, characterized in that: The second circulation loop is connected to a temperature sensor, which is suitable for collecting temperature information of the second coolant. The connection point between at least one of the temperature sensors and the second circulation loop is located between the third position and the outlet of the second circulation loop.

5. The liquid cooling unit according to any one of claims 1 to 4, characterized in that: The first circulation loop is provided with a water pump, which is located upstream of the fourth position; and / or The first circulation loop is provided with an expansion tank, which is located upstream of the fourth position; and / or The first circulation loop is provided with a filter, which is located upstream of the fourth position; and / or The first circulation loop is provided with a water supply valve, which is located upstream of the fourth position; and / or The first circulation loop is provided with a heater, which is located downstream of the first position.

6. The liquid cooling unit according to any one of claims 1 to 4, characterized in that: The second circulation loop is provided with a water pump, which is located upstream of the third position; and / or The second circulation loop is provided with an expansion tank, which is located upstream of the third position; and / or The second circulation loop is provided with a filter, which is located upstream of the third position; and / or The second circulation loop is provided with a water replenishment valve, which is located upstream of the third position.

7. The liquid cooling unit according to any one of claims 1 to 4, characterized in that: The refrigeration mechanism comprises a condenser, and two ends of the third circulation loop are respectively connected to an inlet and an outlet of the condenser.

8. The liquid cooling unit according to claim 7, characterized in that: The third circulation loop is provided with a compressor, and the compressor is located between the fifth position and the condenser; and / or The refrigeration mechanism further comprises a fan, and the fan is arranged adjacent to the condenser.

9. The liquid cooling unit according to any one of claims 1 to 4, characterized in that: The third circulation loop is provided with a liquid reservoir and a charging valve, the liquid reservoir is located between the refrigeration mechanism and the second position, and the charging valve is located between the refrigeration mechanism and the liquid reservoir; and / or The third circulation loop is provided with a filter, which is located upstream of the second position; and / or The third circulation loop is provided with an expansion valve, which is located upstream of the second position; and / or The third circulation loop is provided with a detection valve, which is located downstream of the fifth position.

10. The liquid cooling unit according to any one of claims 1 to 4, characterized in that: The first circulation loop is connected to a temperature sensor, which is suitable for collecting temperature information of the first coolant; and / or The second circulation loop is connected to a temperature sensor, which is suitable for collecting temperature information of the second coolant; and / or The third circulation loop is connected to a temperature sensor, which is suitable for collecting temperature information of the refrigerant.

11. The liquid cooling unit according to any one of claims 1 to 4, characterized in that: The first circulation loop is connected to a pressure sensor, which is suitable for collecting pipeline pressure information of the first circulation loop; and / or The second circulation loop is connected to a pressure sensor, which is suitable for collecting pipeline pressure information of the second circulation loop; and / or The third circulation loop is connected to a pressure sensor, which is suitable for collecting pipeline pressure information of the third circulation loop.

12. The liquid cooling unit according to any one of claims 1 to 4, characterized in that: The first coolant is water; and / or The second coolant is water; and / or The refrigerant is fluorine.

13. An energy storage cabinet, characterized in that: It comprises the liquid cooling unit as described in any one of claims 1 to 12.

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