An electrical cabinet and energy storage device

Abstract

The application discloses an electrical cabinet and an energy storage device, which comprise a cabinet body, a supply flow main path and a return flow main path, a plurality of first cooling units are arranged in the cabinet body in sequence along a first direction; the supply flow main path and the return flow main path are arranged in parallel and extend along the first direction, the supply flow main path is communicated with the inlet of the first cooling unit through a supply flow branch, and the return flow main path is communicated with the outlet of the first cooling unit through a return flow branch; and a fluid inlet is arranged between 1 / 8H-7 / 8H of the supply flow main path, and a fluid outlet is arranged at the top end of the return flow main path; or, the fluid inlet is arranged at the top of the supply flow main path, and the fluid outlet is arranged between 1 / 8h-7 / 8h of the return flow main path. Through the design of the above structure, the flow of the first cooling unit corresponding to the electrical module close to the top layer in the electrical cabinet can be improved to a certain extent, and then the risk of the electrical module close to the top layer in the electrical cabinet being too high in temperature can be reduced.

Description

Technical Field

[0001] This application relates to the field of heat dissipation technology for electrical cabinets, and more specifically, to an electrical cabinet and energy storage device. Background Technology

[0002] As an important component of energy storage equipment, electrical cabinets often require a primary cooling unit to dissipate heat from the electrical modules within the cabinet. Currently, the liquid cooling pipes used to circulate coolant to the primary cooling unit in electrical cabinets mostly adopt a bottom-inlet and top-outlet arrangement. However, with this arrangement, the electrical modules arranged in layers within the electrical cabinet, especially those near the top layer, are prone to overheating. Utility Model Content

[0003] In view of this, this application provides an electrical cabinet and energy storage device to improve the problem that electrical modules arranged in layers within the electrical cabinet are prone to overheating near the top layer.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] An electrical cabinet, comprising:

[0006] The cabinet contains a plurality of first cooling units arranged sequentially along a first direction, the first direction being the height direction of the cabinet.

[0007] The main supply path and the main return path both extend along the first direction and are arranged in parallel. The main supply path has a fluid inlet and is provided with a plurality of supply branches arranged at intervals along the first direction. The supply branches are connected to the inlet of the first cooling unit. The main return path has a fluid outlet and is provided with a plurality of return branches arranged at intervals along the first direction. The return branches are connected to the outlet of the first cooling unit.

[0008] Wherein, the fluid inlet is located between 1 / 8H and 7 / 8H of the main supply line, where H is the height of the main supply line in the first direction, and the fluid outlet is arranged near the top of the main return line; or, the fluid inlet is arranged near the top of the main supply line, and the fluid outlet is located between 1 / 8h and 7 / 8h of the main return line, where h is the height of the main return line in the first direction.

[0009] In some embodiments of this application, when the fluid outlet is arranged near the top of the return main line, the fluid inlet is set at a height A in the supply main line; wherein, (1 / 2H-1 / 8H)≤A≤(1 / 2H+1 / 8H).

[0010] In some embodiments of this application, when the fluid inlet is arranged near the top of the main supply line, the fluid outlet is set at a height of a in the main return line; wherein, (1 / 2h-1 / 8h)≤a≤(1 / 2h+1 / 8h).

[0011] In some embodiments of this application, the main supply path and the main return path are respectively located on different sides of the first cooling unit; or, the main supply path and the main return path are located on the same side of the first cooling unit.

[0012] In some embodiments of this application, the electrical cabinet further includes a refrigeration unit, which has a unit outlet pipe and a unit return pipe. The unit outlet pipe is connected to the fluid inlet, and the unit return pipe is connected to the fluid outlet.

[0013] In some embodiments of this application, the refrigeration unit is disposed inside the cabinet and located on the inlet side of the first cooling unit; or, the refrigeration unit is disposed outside the cabinet.

[0014] To address the issue of overheating in electrical modules arranged in a stacked configuration within an electrical cabinet, particularly those near the top layer, this application provides an electrical cabinet comprising a cabinet body, a main supply circuit, and a main return circuit. In practical application, the cooling medium enters the main supply circuit from the fluid inlet, then flows through various supply branches before entering the first cooling unit from its inlet. From there, it flows into the various return branches from the outlet of the first cooling unit, converging into the main return circuit, and finally exiting from the fluid outlet of the main return circuit. This allows the coolant to flow through each of the first cooling units, enabling them to dissipate heat from their corresponding electrical modules. Simultaneously, because the fluid pressure at the inlet is greater than the fluid pressure at the outlet, and the fluid pressure gradually decreases from the inlet to the outlet along the entire fluid circulation pipeline, the electrical cabinet provided in this application addresses this issue by controlling the fluid pressure at the inlet on the main supply circuit and the main return circuit. The arrangement of the fluid outlet is optimized. Specifically, by setting the fluid inlet between 1 / 8H and 7 / 8H of the main supply path and the fluid outlet at the top of the main return path, or by setting the fluid inlet at the top of the main supply path and the fluid outlet between 1 / 8h and 7 / 8h of the main return path, compared to the bottom-inlet and top-outlet method, the effective path from the fluid inlet to the fluid outlet can be shortened, which helps to reduce the flow resistance of the path from the fluid inlet to the fluid outlet, and the corresponding flow rate increases. Furthermore, one of the fluid inlet and fluid outlet is arranged close to the top of its corresponding main path, and the corresponding main path is connected to the first cooling unit corresponding to the electrical module near the top layer through the corresponding branch. Therefore, the flow rate of the first cooling unit corresponding to the electrical module near the top layer can be increased to a certain extent, thereby reducing the risk of overheating of the electrical module near the top layer in the electrical cabinet.

[0015] On the other hand, this application also provides an energy storage device, including an electrical cabinet as described in any of the above embodiments and a plurality of battery packs arranged sequentially within the cabinet along the first direction. A first cooling unit within the cabinet corresponds to each battery pack, and the first cooling unit is configured to exchange heat with the corresponding battery pack. Since the aforementioned electrical cabinet has the above-mentioned technical effects, the energy storage device having this electrical cabinet should also have corresponding technical effects, which will not be elaborated further here.

[0016] In some embodiments of this application, the first cooling unit corresponds one-to-one with the battery pack; or, at least one first cooling unit corresponds to multiple battery packs.

[0017] In some embodiments of this application, the energy storage device further includes an energy storage converter disposed within the cabinet.

[0018] In some embodiments of this application, the energy storage device further includes a second cooling unit, which is arranged in a heat exchange configuration with the energy storage converter;

[0019] The second cooling unit is connected to the main supply line and the main return line; or, the second liquid cooling unit is connected to a fluid circulation pipeline other than the main supply line and the main return line.

[0020] In some embodiments of this application, the energy storage device further includes a power distribution compartment disposed within the cabinet;

[0021] The refrigeration unit connected to the main power supply line and the main return line is installed inside the cabinet. The refrigeration unit and the power distribution compartment are both located on one side of the battery pack and are arranged sequentially along the first direction.

[0022] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the electrical cabinet with the main power supply and return lines arranged on both sides of the battery pack, provided in an embodiment of this application;

[0025] Figure 2 for Figure 1 The diagram shows a structure in which the fluid outlet is located near the top of the return main line and the fluid inlet is set at a height of A in the supply main line.

[0026] Figure 3 for Figure 1 In the case shown, the fluid outlet is arranged near the top of the return main line, and the fluid inlet is set at a height of A in the supply main line. When A is 1 / 2H+1 / 8H, the structural diagram of the battery pack is omitted.

[0027] Figure 4A schematic diagram of the structure provided in this application embodiment, showing that the main power supply circuit and the main return circuit in the electrical cabinet are arranged on the same side of the battery pack;

[0028] Figure 5 for Figure 4 The diagram shows a structure in which the fluid outlet is located at the top of the return main line and the fluid inlet is located at a height of A in the supply main line.

[0029] Figure 6 for Figure 4 The diagram shows a structure in which the fluid inlet is located at the top of the main supply line and the fluid outlet is located at a height of 'a' in the main return line.

[0030] in, Figures 1-6 middle:

[0031] 1-Cabinet;

[0032] 11-Cabinet doors;

[0033] 2-First cooling unit;

[0034] 3-Main supply road;

[0035] 31-Fluid inlet;

[0036] 32-Supply branch;

[0037] 4-Return to main road;

[0038] 41 - Fluid outlet;

[0039] 42-Return branch;

[0040] 5-Refrigeration unit;

[0041] 51 - Unit outlet pipe;

[0042] 52 - Unit return pipe;

[0043] 6-Electrical modules;

[0044] 6'-battery pack;

[0045] 7-Energy storage converter;

[0046] 8-Power Distribution Warehouse. Detailed Implementation

[0047] The core of this application is to provide an electrical cabinet and energy storage device to improve the problem that the electrical modules near the top layer of the stacked electrical modules in the electrical cabinet are prone to overheating.

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] With the rapid development of the new energy industry, energy storage systems (such as industrial and commercial energy storage systems) are evolving towards higher energy density. In practical applications, limited by ground installation space, multiple electrical modules (such as single-cluster battery packs) in energy storage systems are stacked along the height of the enclosure, and the number of stacked layers is increasing. As an important component of energy storage equipment, the electrical cabinet often requires a cooling unit to dissipate heat from the stacked electrical modules inside.

[0050] In related technologies, the cooling circulation pipes used to circulate cooling media to the cooling unit within the electrical cabinet often adopt a bottom-in, top-out arrangement. However, with this arrangement, the electrical modules near the top layer in the stacked electrical modules within the electrical cabinet are prone to overheating.

[0051] Based on this, this application provides an electrical cabinet to improve the problem that electrical modules arranged in layers within the electrical cabinet are prone to overheating, especially those near the top layer.

[0052] Specifically, refer to Figure 1 As shown, the electrical cabinet provided in this embodiment includes a cabinet body 1, a main power supply line 3, and a main return line 4.

[0053] The cabinet 1 is primarily used to house stacked electrical modules 6. This stacking arrangement is not limited to a single row; it can also include multiple rows of stacked electrical modules 6, such as multiple rows arranged along the length of the cabinet 1. These electrical modules 6 can specifically include, but are not limited to, battery packs 6', power storage converters (PCS), and control modules. To meet the heat dissipation requirements of the electrical modules 6, the electrical cabinet needs to be equipped with a corresponding cooling device. This cooling device specifically includes a first cooling unit 2, which is mainly used for heat exchange with the electrical modules 6. Multiple first cooling units 2 are arranged sequentially within the cabinet 1 along a first direction. In this embodiment, the first direction is specifically the height direction of the cabinet 1. The first cooling unit 2 can specifically be designed as a cold plate structure, for example, it can be designed as... Figure 1 and Figure 4The L-shaped cold plate shown has an internal flow channel structure for the cooling medium to flow through and achieve heat exchange. Specifically, this cold plate can be designed as an integrated structure with the electrical module 6, or it can be designed as a separate heat exchange arrangement (such as direct or indirect contact heat exchange). The first cooling unit 2 can also be designed as a winding and tortuous heat exchange tube structure, as long as it meets the corresponding heat exchange requirements; no further specific limitations are made here. In addition, to facilitate maintenance operations on the components inside the cabinet 1, the front of the cabinet 1 can generally be designed with an openable and closable cabinet door 11.

[0054] The liquid cooling main circuit specifically includes a supply main circuit 3 and a return main circuit 4. The supply main circuit 3 and the return main circuit 4 are mainly used to connect with the supply source of the cooling medium (or... Figure 1 The refrigeration unit 5 shown is connected, and the refrigeration unit 5 can be, but is not limited to, a liquid-cooled unit (which mainly supplies coolant through a liquid-cooled pump), a compressor refrigeration unit (which mainly supplies cooling medium through a compressor and refrigerant), etc. For example, it can also be a cooling medium pipeline led out from other equipment, without specific limitations here. The cooling medium is associated with the cooling medium supply source. For example, when the cooling medium supply source is a liquid-cooled unit, the corresponding cooling medium can be a coolant such as water; or, when the cooling medium supply source is a compressor, the corresponding cooling medium can be a refrigerant.

[0055] Continue to refer to Figure 1 Combination Figure 3 Both the main power supply line 3 and the main return line 4 extend along the first direction and are arranged in parallel. Specifically, they can be arranged along the electrical module 6 (but are not limited to). Figure 1 The battery pack 6' is arranged in the stacked height direction. The main supply line 3 has a fluid inlet 31, which is mainly used to connect with the supply pipeline of the cooling medium supply source (such as the unit outlet pipe 51 of the refrigeration unit 5). The main supply line 3 is provided with a plurality of supply branches 32 arranged sequentially at intervals along the first direction. The supply branches 32 are connected to the inlet of the first cooling unit 2. Specifically, the corresponding connection means that the supply branch 32 is connected to the inlet of the first cooling unit 2 that is adjacent or close to it. Specifically, the supply branch 32 can be connected to the inlet of the first cooling unit 2 one by one, or one supply branch 32 can be connected to the inlet of multiple adjacent first cooling units 2 (such as two, three, etc., the specific number is related to the spacing between two adjacent stacked first cooling units 2. The closer the distance, the more suitable it is to use one supply branch 32 to connect multiple first cooling units 2). The cooling medium from the main supply line 3 can be distributed to each of the first cooling units 2 via the supply branch line 32. The return main line 4 has a fluid outlet 41, which is mainly used to draw away the cooling medium that has completed heat exchange. Specifically, it can be, but is not limited to, returning to the source of the cooling medium supply (for example, it can be connected to the unit return pipe 52 of the refrigeration unit 5).

[0056] The main return path 4 is provided with multiple return branch paths 42 arranged at intervals along the first direction. Each return branch path 42 is connected to the outlet of the first cooling unit 2. Specifically, this connection means that each return branch path 42 is connected to the outlet of its adjacent or nearby first cooling unit 2. Alternatively, one return branch path 42 can be connected to the outlet of each first cooling unit 2 in a one-to-one correspondence, or one return branch path 42 can be connected to the outlets of multiple adjacent first cooling units 2. The cooling medium from each first cooling unit 2 can be collected and channeled to the main return path 4 via the return branch paths 42, and then diverted away by the fluid outlet 41 of the main return path 4.

[0057] Within the electrical cabinet 1, the stacked electrical modules 6 exhibit a significant temperature gradient due to the thermal effects of solar radiation and natural air convection. For example, in an outdoor setting, the temperature at the top of cabinet 1 is higher than at the bottom (e.g., 10°C-15°C). This temperature distribution results in varying heat dissipation requirements for the electrical modules 6 at different heights, with those near the top requiring greater cooling capacity due to the higher ambient temperature.

[0058] In the electrical cabinet provided in this embodiment, the positions of the fluid inlet 31 and the fluid outlet 41 have been optimized and adjusted. Specifically, refer to... Figure 2 and Figure 5 As shown, the fluid inlet 31 is positioned in the middle region of the main supply path 3, specifically between 1 / 8H and 7 / 8H. This means it can be any height value including 1 / 8H, 7 / 8H, and any value between 1 / 8H and 7 / 8H, such as 1 / 8H, 1 / 4H, 3 / 8H, 1 / 2H, or 5 / 8H. H represents the height of the main supply path 3 in the first direction, with the height of the lowest point of the main supply path 3 from bottom to top serving as the zero reference. The fluid outlet 41 is positioned near the top of the return path 4 (i.e., located at the top of the return path 4 or very close to it, for example, within 1 / 16H of the top of the return path 4); or as shown in the diagram. Figure 6As shown, the fluid inlet 31 is designed to be located near the top of the main supply line 3 (that is, located at the top of the main supply line 3 or very close to the top of the main supply line 3, such as within 1 / 16h of the top of the return main line 4). The fluid outlet 41 is located in the middle area of ​​the return main line 4, specifically between 1 / 8h and 7 / 8h, which can be any height value including 1 / 8h, 7 / 8h and 1 / 8h-7 / 8h, such as 1 / 8h, 1 / 4h, 3 / 8h, 1 / 2h or 5 / 8h, etc. h is the height of the return main line 4 in the first direction, that is, the height of the bottom of the return main line 4 from bottom to top is used as the zero reference.

[0059] By optimizing the positions of the fluid inlet 31 and the fluid outlet 41 as described above, the electrical cabinet provided in this application, in actual application, allows the cooling medium to enter the main supply line 3 from the fluid inlet 31, then pass through each supply branch line 32, and finally enter the first cooling unit 2 from the inlet. Afterwards, it flows from the outlet of the first cooling unit 2 into each return branch line 42, and the return branch lines 42 converge into the main return line 4, finally flowing out from the fluid outlet 41 of the main return line 4. This allows the coolant to flow through each first cooling unit 2, enabling the first cooling unit 2 to dissipate heat from its corresponding electrical module 6, thus fulfilling the basic heat dissipation requirements of each first cooling unit 2. Simultaneously, since the fluid pressure at the fluid inlet 31 is greater than the fluid pressure at the fluid outlet 41, and the fluid pressure gradually decreases from the fluid inlet 31 to the fluid outlet 41 throughout the fluid circulation pipeline, by setting the fluid inlet 31 in the middle of the main supply line 3... In the intermediate region, specifically between 1 / 8H and 7 / 8H, the fluid outlet 41 is arranged near the top of the return main road 4, or the fluid inlet 31 is arranged near the top of the supply main road 3, and the fluid outlet 41 is located in the middle region of the return main road 4, specifically between 1 / 8h and 7 / 8h. Compared with the bottom-inlet and top-outlet method, this can reduce the effective path from the fluid inlet 31 to the fluid outlet 41, which helps to reduce the flow resistance of the path from the fluid inlet 31 to the fluid outlet 41, and the corresponding flow rate increases. Furthermore, one of the fluid inlet 31 and the fluid outlet 41 is arranged near the top of its respective main road, and the corresponding main road is connected to the first cooling unit 2 corresponding to the electrical module 6 near the top layer through the corresponding branch road. Therefore, it can increase the flow rate of the first cooling unit 2 corresponding to the electrical module 6 near the top layer to a certain extent, thereby reducing the risk of overheating of the electrical module 6 near the top layer in the electrical cabinet.

[0060] In addition, the arrangement of the main fluid path and fluid inlet / outlet in the electrical cabinet provided in this application can adjust the flow rate in the first cooling unit 2 corresponding to the electrical module 6 without the need to add an additional throttling device or change the diameter of the connecting pipes corresponding to different layers, and the cost is low.

[0061] In some specific implementation plans, refer to Figure 1 and Figure 2 As shown, when the fluid outlet 41 is arranged near the top of the return main road 4, the fluid inlet 31 is set at a height A in the supply main road 3. When A satisfies the condition (1 / 2H-1 / 8H)≤A≤(1 / 2H+1 / 8H), that is, 3 / 8H≤A≤5 / 8H, the flow path of the first cooling unit 2 at height A and above the fluid inlet 31 is relatively small, and the flow resistance is also small. This helps to improve the heat dissipation effect of the first cooling unit 2 at height A and above, and can better meet the heat dissipation needs of the electrical module 6 near the top layer.

[0062] For example, the flow rate of fluid outlet 41 has a greater impact on the flow distribution of the first cooling unit 2 than the flow rate of fluid inlet 31. The flow rate is greater closer to the fluid outlet 41. Therefore, designing the fluid outlet 41 to be arranged near the top of the return main road 4 can enable the first cooling unit 2 corresponding to the electrical modules 6 near the top layer to obtain a greater flow rate and better meet the heat dissipation requirements of the electrical modules 6 near the top layer.

[0063] Another example, see reference. Figure 2 Combination Figure 3 When the fluid outlet 41 is designed to be located near the top of the return main road 4, and the fluid inlet 31 is designed to be located in the middle to upper part of the supply main road 3, for example, when the fluid inlet 31 is set at a height of A in the supply main road 3, and A = 5 / 8 H, taking the electrical modules 6 in the electrical cabinet as having 8 stacked layers along the first direction as an example, since the pressure of the fluid outlet 41 is lower than that of the fluid inlet 31, the first cooling unit 2 corresponding to the three electrical modules 6 near the top (that is, the electrical modules 6 corresponding to the height position of 5 / 8 H and above) is closer to the fluid inlet 31 and the fluid outlet 41. Consequently, the fluid path required for the cooling medium to flow through the first cooling unit 2 corresponding to these three electrical modules 6 is shorter, and the flow resistance is smaller, so that the first cooling unit 2 corresponding to these three electrical modules 6 can obtain a larger flow rate, thereby improving the heat dissipation effect of these three electrical modules 6.

[0064] In some other specific implementation schemes, refer to Figure 6As shown, when the fluid inlet 31 is designed to be arranged near the top of the main supply path 3, the fluid outlet 41 is set at a height of the return path 4. When a satisfies the condition: 1 / 2h-1 / 8h≤a≤1 / 2h+1 / 8h, that is, 3 / 8h≤a≤5 / 8h, the flow path of the first cooling unit 2 at height a and above the fluid outlet 41 is relatively small, and the flow resistance is also small. This helps to improve the heat dissipation effect of the first cooling unit 2 at height a and above, and can better meet the heat dissipation needs of the electrical module 6 near the top layer.

[0065] For example, when the fluid inlet 31 is designed to be arranged near the top of the main supply path 3, the fluid outlet 41 can be set at a position slightly above the middle of the return path 4. For example, the fluid outlet 41 can be set at a height of a = 5 / 8h. Taking the number of stacked electrical modules 6 in the electrical cabinet along the first direction as 8 layers, since the pressure of the fluid outlet 41 is lower than that of the fluid inlet 31, the first cooling unit 2 corresponding to the three electrical modules 6 near the top (that is, the electrical modules 6 at heights of 5 / 8h and above) is closer to the fluid inlet 31 and the fluid outlet 41. The corresponding cooling medium has a shorter fluid path and lower flow resistance when flowing through the first cooling unit 2 corresponding to these three electrical modules 6, so that the first cooling unit 2 corresponding to these three electrical modules 6 can obtain a larger flow rate, thereby improving the heat dissipation effect of these three electrical modules 6.

[0066] In some specific implementation plans, refer to Figure 1 and Figure 2 , combined Figure 3 As shown, the main supply path 3 and the main return path 4 can be respectively set on different sides of the first cooling unit 2, that is, different sides of the stacked electrical modules 6. Since it has been previously defined that the main supply path 3 and the main return path 4 are both arranged along the first direction (that is, the height direction of the cabinet 1), it is easy for those skilled in the art to understand that the different sides here can specifically refer to any two different sides of the left, right, front and rear sides of the stacked electrical modules 6. Among them, "left", "right", "front" and "rear" are defined based on the front of the electrical cabinet (that is, the side of the cabinet 1 with the cabinet door 11) as the reference point, based on the user's facing the front of the electrical cabinet. By setting the main supply path 3 and the main return path 4 on adjacent or opposite sides of the first cooling unit 2, the inlet and outlet of the first cooling unit 2 can be designed on different sides, thereby maximizing the flow path of the cooling medium in the first cooling unit 2, thereby improving the uniformity of heat exchange of the cooling medium in the same first cooling unit 2.

[0067] It is understandable that placing the main supply line 3 and the main return line 4 on different sides of the first cooling unit 2 is merely an example of an embodiment of this application. In actual applications, reference can also be made to... Figure 4 , combined Figure 5 and Figure 6 The main supply line 3 and the main return line 4 are located on the same side of the first cooling unit 2, for example, on any one of the left, right, front, and rear sides of the stacked electrical modules 6. The terms "left," "right," "front," and "rear" are defined based on the user's view of the electrical cabinet (i.e., the side with the cabinet door 11) and using the stacked electrical modules 6 as a reference. By placing the main supply line 3 and the main return line 4 on the same side of the first cooling unit 2, the fluid inlet 31 of the main supply line 3 and the fluid outlet 41 of the main return line 4 are located on the same side, facilitating connection to the corresponding cooling medium supply source (i.e., the refrigeration unit 5). This reduces the length of the connecting pipes, helps lower costs, and also reduces pipe flow resistance. For example, when the cooling medium supply source is a liquid-cooled unit, the configuration requirements of the liquid-cooled pump for supplying the cooling medium can be reduced to some extent.

[0068] In some specific implementation schemes, the aforementioned electrical cabinet also includes a refrigeration unit 5. The refrigeration principle of the refrigeration unit 5 can be coolant circulation refrigeration, such as the liquid cooling unit mentioned above providing coolant, or refrigerant refrigeration, such as the compressor mentioned above providing refrigerant refrigeration.

[0069] Taking the refrigeration principle of refrigeration unit 5 as an example of coolant circulation refrigeration, refrigeration unit 5 specifically includes a liquid storage tank, a liquid-cooled pump, a heat exchanger, a filter, and valves. The liquid-cooled pump mainly provides power for coolant circulation, the heat exchanger mainly exchanges heat with the coolant to obtain the required coolant temperature, the filter mainly filters impurities, and the valves mainly facilitate flow control. This refrigeration unit 5 has a unit outlet pipe 51 and a unit return pipe 52. The unit outlet pipe 51 is connected to the fluid inlet 31, and the unit return pipe 52 is connected to the fluid outlet 41. Through refrigeration unit 5, a stable coolant circulation supply system can be formed between the main supply line 3 and the main return line 4. Of course, it is understandable that in actual application, there may be no need for the refrigeration unit 5. For example, the coolant output pipeline corresponding to a certain device can be connected to the fluid inlet 31 of the main supply line 3, and the fluid outlet 41 of the main return line 4 can be directly discharged or connected to other corresponding pipelines. As long as the coolant can flow between the main supply line 3 and the main return line 4, the heat dissipation requirements of the first cooling unit 2 can be met.

[0070] The specific location of the refrigeration unit 5 can be selected according to actual needs. For example, the refrigeration unit 5 can be installed inside the cabinet 1, and the specific location can be chosen according to requirements. For example, the refrigeration unit 5 can be designed to be located on the inlet side of the first cooling unit 2. By designing the refrigeration unit 5 inside the cabinet 1, the protection performance of the refrigeration unit 5 can be enhanced, and by designing it to be located on the inlet side of the first cooling unit 2, the length of the pipeline connection can be shortened. Alternatively, the refrigeration unit 5 can also be installed outside the cabinet 1. This design can provide more space inside the cabinet 1, which can increase the installation space of the electrical module 6. For example, when the electrical module 6 is a battery pack 6', it helps to improve the energy storage density of the electrical cabinet.

[0071] On the other hand, this application also provides an energy storage device, which includes an electrical cabinet as described in any of the above embodiments and a plurality of battery packs 6' disposed within a cabinet 1 of the electrical cabinet. The plurality of battery packs 6' are arranged sequentially along a first direction within the cabinet 1. A first cooling unit 2 within the cabinet 1 corresponds to each battery pack 6', and the first cooling unit 2 is configured to have a heat exchange arrangement with its corresponding battery pack 6 (e.g., direct or indirect contact heat exchange). Since the aforementioned electrical cabinet has the above-mentioned technical effects, the energy storage device having this electrical cabinet should also have corresponding technical effects, which will not be elaborated further here.

[0072] For example, the first cooling unit 2 and the battery pack 6' can be designed in a one-to-one correspondence, that is, one first cooling unit 2 corresponds to one battery pack 6' for heat exchange. Such a design can better meet the different heat dissipation requirements of different battery packs 6'.

[0073] Another example is that at least one first cooling unit 2 corresponds to multiple battery packs 6'. For example, there are multiple battery packs 6' on the same layer. In this case, one first cooling unit 2 can correspond to multiple battery packs 6' on the same layer. Or, for example, one first cooling unit 2 can correspond to battery packs 6' on two adjacent layers. This structural form helps to reduce the number of first cooling units 2 arranged.

[0074] In some specific implementation plans, refer to Figure 1As shown, the aforementioned energy storage device may also include an energy storage converter 7 installed within the cabinet 1. By designing the energy storage converter 7, the energy storage system can achieve numerous functions. For example, it can be used to achieve bidirectional energy conversion: serving as the interface between the energy storage system and the grid / load, it converts alternating current (AC) to direct current (DC) for storage in the battery during charging, and then inverts the DC back to AC for the load during discharging; it can also be used to achieve voltage and frequency control: precisely adjusting the output voltage amplitude and frequency to ensure synchronization with the grid and maintain grid stability; or it can be used to achieve dynamic power regulation: adjusting the output power according to the real-time demand or instructions of the grid, participating in grid services such as frequency regulation and peak shaving; or it can be used to achieve intelligent energy management: based on electricity price, load, or dispatch instructions... The system can be used to optimize charging and discharging strategies to improve system economy and efficiency; or to implement multiple protection mechanisms: integrating overload, short circuit, and overheat protection functions to prevent equipment damage, detect abnormal grid conditions, prevent islanding effects, and ensure operation and maintenance safety; or to achieve thermal management and environmental adaptability: using liquid cooling technology to enhance heat dissipation efficiency, improve power density, and increase operational reliability in complex environments such as high temperature and high humidity; or to achieve modular and intelligent expansion: modular design supports flexible expansion, reduces maintenance costs, and is equipped with a remote communication interface to achieve data interaction and intelligent scheduling with the energy management system (EMS).

[0075] In a further embodiment, the energy storage device may also include a second cooling unit, which is arranged in a heat exchange configuration with the energy storage converter 7 (e.g., through direct or indirect contact heat exchange). This second cooling unit may, but is not limited to, employ a cold plate structure and may be designed as an integral part of the energy storage converter 7, or as a separate heat exchange arrangement; no specific limitations are made here. The second cooling unit may be connected to the first cooling unit 2 via a single supply main line 3 and return main line 4. For example, if both the first cooling unit 2 and the second cooling unit use coolant circulation cooling, they may be connected to a single coolant circulation system. Alternatively, the second liquid cooling unit may be connected to a fluid circulation pipeline other than the supply main line 3 and return main line 4 connected to the first cooling unit 2; no specific limitations are made here. Although the second cooling unit is not shown in the accompanying drawings, this does not affect the understanding of the technical solution corresponding to this embodiment by those skilled in the art.

[0076] Furthermore, the specific location of the energy storage converter 7 within the cabinet 1 is not limited. For example, the energy storage converter 7 can be positioned below the bottommost battery pack 6' in the first direction. By designing the energy storage converter 7 in this way, the overall center of gravity of the energy storage device can be lowered, which helps to improve the overall stability of the energy storage device. Alternatively, the energy storage converter 7 can also be positioned above the topmost battery pack 6' in the first direction. By designing this structure, the length of the connecting cable between the energy storage converter and the battery pack ' can be reduced, thereby reducing line loss and electromagnetic interference and improving the system's energy transmission efficiency.

[0077] In some other specific implementation schemes, refer to Figure 1 As shown, the aforementioned energy storage device may further include a power distribution compartment 8 housed within the cabinet 1, and a chiller unit 5 connected to the main power supply line 3 and the main return line 4 is also housed within the cabinet 1; wherein, the chiller unit 5 and the power distribution compartment 8 are both located on one side of the battery pack 6' and arranged sequentially along the first direction. By designing this structural form, the internal space of the cabinet 1 can be fully utilized, and the pipeline connection between the chiller unit 5 and the first cooling unit 2 is more convenient, and the connecting cable between the power distribution compartment 8 and the battery pack 6' is shorter and more convenient to connect.

[0078] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0079] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0080] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0081] It should also be noted that in the description of the embodiments of this application, the terms "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0082] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An electrical cabinet, characterized in that, include: The cabinet (1) is provided with a plurality of first cooling units (2) arranged sequentially along a first direction, the first direction being the height direction of the cabinet (1); The main supply path (3) and the main return path (4) extend along the first direction and are arranged in parallel. The main supply path (3) has a fluid inlet (31) and a plurality of supply branches (32) are arranged at intervals along the first direction. The supply branches (32) are connected to the inlet of the first cooling unit (2). The main return path (4) has a fluid outlet (41) and a plurality of return branches (42) are arranged at intervals along the first direction. The return branches (42) are connected to the outlet of the first cooling unit (2). Wherein, the fluid inlet (31) is located between 1 / 8H and 7 / 8H of the main supply line (3), where H is the height of the main supply line (3) in the first direction, and the fluid outlet (41) is arranged near the top of the return line (4); or, the fluid inlet (31) is arranged near the top of the main supply line (3), and the fluid outlet (41) is located between 1 / 8h and 7 / 8h of the return line (4), where h is the height of the return line (4) in the first direction.

2. The electrical cabinet as described in claim 1, characterized in that, When the fluid outlet (41) is arranged near the top of the return main line (4), the fluid inlet (31) is set at a height of A in the supply main line (3); wherein (1 / 2H-1 / 8H)≤A≤(1 / 2H+1 / 8H).

3. The electrical cabinet as described in claim 1, characterized in that, When the fluid inlet (31) is arranged near the top of the main supply line (3), the fluid outlet (41) is set at a height of a in the return main line (4); wherein (1 / 2h-1 / 8h)≤a≤(1 / 2h+1 / 8h).

4. The electrical cabinet as described in claim 1, characterized in that, The main supply path (3) and the main return path (4) are respectively located on different sides of the first cooling unit (2); or, the main supply path (3) and the main return path (4) are located on the same side of the first cooling unit (2).

5. The electrical cabinet as described in claim 1, characterized in that, It also includes a refrigeration unit (5), which has a unit outlet pipe (51) and a unit return pipe (52). The unit outlet pipe (51) is connected to the fluid inlet (31), and the unit return pipe (52) is connected to the fluid outlet (41).

6. The electrical cabinet as described in claim 5, characterized in that, The refrigeration unit (5) is located inside the cabinet (1) and at the inlet side of the first cooling unit (2); or, the refrigeration unit (5) is located outside the cabinet (1).

7. An energy storage device, characterized in that, The device includes an electrical cabinet as described in any one of claims 1-6 and a plurality of battery packs (6') arranged sequentially in the cabinet (1) of the electrical cabinet in a manner that runs along the first direction. A first cooling unit (2) in the cabinet (1) corresponds to the battery packs (6') and is configured to be arranged in a heat exchange arrangement with the corresponding battery packs (6').

8. The energy storage device as described in claim 7, characterized in that, The first cooling unit (2) corresponds one-to-one with the battery pack (6'); or, at least one of the first cooling units (2) corresponds to multiple battery packs (6').

9. The energy storage device as described in claim 7, characterized in that, The energy storage device also includes an energy storage converter (7) installed inside the cabinet (1).

10. The energy storage device as described in claim 9, characterized in that, The energy storage device further includes a second cooling unit, which is arranged in a heat exchange configuration with the energy storage converter (7); The second cooling unit is connected to the main supply line (3) and the main return line (4); or, the second liquid cooling unit is connected to a fluid circulation pipeline other than the main supply line (3) and the main return line (4).

11. The energy storage device as described in claim 7, characterized in that, The energy storage device also includes a power distribution compartment (8) located inside the cabinet (1). The refrigeration unit (5) connected to the main power supply line (3) and the main return line (4) is located inside the cabinet (1). The refrigeration unit (5) and the power distribution compartment (8) are both located on one side of the battery pack (6') and arranged sequentially along the first direction.

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