Convergence cabinet and energy storage system

Abstract

The embodiment of the invention provides a confluence cabinet and an energy storage system. The confluence cabinet comprises a confluence cabinet body. The confluence cabinet body comprises a plurality of heating units. The heating unit comprises at least one heating element; the plurality of heating units are sequentially arranged in the heat dissipation channel of the confluence cabinet body according to the size sequence of heat generated in unit time; and the heat conduction direction of the plurality of heating units is consistent with the movement direction of a refrigerant in the heat dissipation channel. According to the embodiment of the invention, all the elements of the confluence cabinet are arranged according to the magnitude of heat generated in unit time, the conduction sequence of heat and the heat dissipation direction are unified, the overall heat dissipation performance of the confluence cabinet is improved, the situation that multiple door bodies are arranged to enhance heat dissipation is avoided, and therefore the situation that the layout of an energy storage system is limited is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of heat dissipation of energy storage systems, and more specifically, to a combiner cabinet and an energy storage system. Background Art

[0002] In the related art, the energy storage system includes an energy storage cabinet and a combiner cabinet. In the energy storage system, one combiner cabinet is used in conjunction with multiple energy storage cabinets. This requires consideration of the rationality of the layout of the combiner cabinet and the energy storage cabinet and the overall coordination.

[0003] The combiner cabinet mainly integrates the energy management system (EMS) display screen, battery management system (BMS), power distribution control unit, battery pack combiner, internal control unit, and air cooling unit.

[0004] In order to address the problem of poor heat dissipation performance, cabinet doors are set on the four sides of the combiner cabinet for heat dissipation. This means that when laying out the energy storage system, the layout of the combiner cabinet and the energy storage cabinet needs to consider the opening direction of the four cabinet doors of the combiner cabinet, which leads to certain limitations on the layout of the entire energy storage system. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a combiner cabinet and an energy storage system, so as to solve or improve to a certain extent the technical problem in the related art that the heat dissipation performance of the combiner cabinet is poor, resulting in the limitation of the layout of the energy storage system.

[0006] To achieve the above-mentioned objectives, in the first aspect, an embodiment of the present application provides a combiner cabinet, including a combiner cabinet body; the combiner cabinet body includes: a plurality of heating units; the heating unit includes at least one heating element; the plurality of heating units are arranged in sequence in the heat dissipation channel of the combiner cabinet body according to the order of the amount of heat generated per unit time; the heat conduction direction of the plurality of heating units is consistent with the movement direction of the refrigerant in the heat dissipation channel.

[0007] In the above technical solution, the heating elements of the junction cabinet are organized into heating units, and the position of each heating unit is arranged in order according to the size of the heat generated per unit time, so that the heat conduction direction between the heating units is consistent with the movement direction of the refrigerant in the heat dissipation channel. In this way, the heat of each heating unit will spontaneously conduct from the high heat area to the low heat area, so that the heat of each heating unit tends to be consistent, avoiding local excessive temperature; coupled with the movement direction of the refrigerant in the heat dissipation channel is consistent with the direction of heat conduction, so that part of the heat in the high heat area is conducted to the low heat area, and part is conducted to the refrigerant, which helps to quickly cool down the high heat area, thereby improving the overall heat dissipation performance of the junction cabinet, thereby avoiding the use of multiple door bodies to enhance heat dissipation, and to a certain extent solving the problem of limited layout of the energy storage system due to the poor heat dissipation performance of the junction cabinet.

[0008] In some implementations of the first aspect, the cabinet body of the combiner cabinet includes:

[0009] A frame, wherein an opening surface of the frame is provided with a first door body; and

[0010] The partition is provided with an inlet and is used to cover an opening surface so that the space between the partition and the frame forms a heat dissipation space, and the space between the partition and the first door body forms a heat insulation space;

[0011] The combiner cabinet body has a refrigerant inlet and a refrigerant outlet; the refrigerant inlet, the heat dissipation space and the refrigerant outlet are connected to form a heat dissipation channel.

[0012] In the above technical solution, a heat dissipation space, a heat dissipation channel and a heat insulation space are formed in the cabinet through partitions, thereby improving the space utilization rate of the cabinet. The heat dissipation channel is convenient for heat dissipation and also for arranging some components with relatively low heat generation in the heat insulation space.

[0013] In some implementations of the first aspect, the frame is further provided with a partition plate; the first space between the partition plates is a heat dissipation space; and the plurality of heating units are installed on one side of the partition plate close to the first space.

[0014] In the above technical solution, a first space is separated from the internal space of the frame by a partition plate, so that a first space is further separated between the partition plate and the partition for installing a heating unit. The refrigerant inlet, the heat dissipation space and the refrigerant outlet are connected to form a heat dissipation channel, thereby achieving targeted heat dissipation for heating elements with a large amount of heat generated per unit time.

[0015] In some implementations of the first aspect, two opposite sides of the frame are open surfaces; the first door body is provided with a refrigerant inlet, which is arranged on an open surface of the frame; the cabinet body also includes: a second door body, which is provided with a refrigerant outlet, which is arranged on another open surface of the frame; and a second space is provided between the partition plate and the second door body.

[0016] In the above solution, there is a second space between the partition plate and the second door body, and the second space can be used to install other components with lower heat generation, thereby further making reasonable use of the space in the frame.

[0017] In some implementations of the first aspect, the refrigerant inlet and the refrigerant outlet are arranged diagonally opposite to each other; the refrigerant outlet is provided with an exhaust device; an inlet is provided at a position corresponding to the refrigerant inlet of the partition; the partition is used to cover an opening surface of the frame so that the refrigerant inlet of the first door body, the inlet of the partition, the heat dissipation space and the refrigerant outlet of the second door body are connected in sequence to form a heat dissipation channel.

[0018] In the above technical solution, a door body is arranged on two oppositely arranged opening surfaces of the cabinet body, and the refrigerant inlet and the refrigerant outlet of the door body are arranged diagonally, thereby preventing the refrigerant from directly entering the refrigerant outlet from the refrigerant inlet, so that the refrigerant can fully absorb heat in the heat dissipation channel and then be discharged; the exhaust device provides power for the refrigerant to move in the heat dissipation channel.

[0019] In some implementations of the first aspect, the partition is made of a heat-insulating material; and / or the frame is a rectangular frame; and / or the frame is integrally formed; and / or the hinges of the first door body and the second door body are arranged diagonally opposite to each other; and / or the side of the partition plate close to the refrigerant outlet is connected to the refrigerant outlet through an air guide plate.

[0020] The above technical solution uses heat-insulating materials to help enhance the heat-insulating effect of the heat-insulating space; the frame is formed in one piece to help improve the protection level of the cabinet, thereby stabilizing the protection level of the energy storage system using the cabinet; the first door body and the second door body are arranged diagonally to facilitate the layout of the energy storage system, avoiding the restriction of the door body on the layout of the energy storage system; the horizontally arranged air guide channel is used to guide the vertically flowing refrigerant to the refrigerant outlet for discharge. Optionally, the refrigerant is air.

[0021] In some implementations of the first aspect, an EMS display screen is provided in the heat-insulating space, and the EMS display screen is provided on a side of the first door body close to the interior of the cabinet.

[0022] The above technical solution sets the EMS display screen inside the cabinet, thus avoiding the long-term exposure of the EMS display screen outside the cabinet, which leads to the reduction of service life due to water seepage in the cabinet, aging of the circuit, etc.; at the same time, the EMS display screen is set on the side of the door body close to the inside of the cabinet, which is convenient for viewing through the EMS display screen during debugging or maintenance, without having to go around to the outside of the door body to view; thus, the setting of the EMS display screen improves the debugging or maintenance efficiency. In addition, the EMS display screen is set in a heat-insulating space, which meets the heat insulation requirements of the EMS display screen, avoids the influence of high temperature on the EMS display screen, and thus prolongs the service life of the EMS display screen.

[0023] In some implementations of the first aspect, the plurality of heating units include:

[0024] A first heating unit is arranged in a first partition of the cabinet;

[0025] A second heating unit, including a first voltage switch assembly, is disposed in a second partition of the cabinet;

[0026] The heat generated per unit time by the second heating unit is less than that of the first heating unit;

[0027] The first heating unit is close to the refrigerant inlet of the heat dissipation channel; the second heating unit is close to the refrigerant outlet of the heat dissipation channel; the heat conduction direction of the first heating unit and the second heating unit is consistent with the wind direction of the heat dissipation channel; the first voltage switch component includes multiple first voltage switches and a first bus; the multiple first voltage switches are connected to the power grid side through the first bus.

[0028] In some implementations of the first aspect, the first voltage switch assembly is a preinstalled switch module.

[0029] In the above technical solution, the first voltage switch assembly is pre-assembled into a switch module, which makes the assembly process simpler and more convenient. After most of the components are pre-assembled in advance, the whole cabinet can be assembled more efficiently, thereby improving the assembly efficiency.

[0030] In a second aspect, an embodiment of the present application provides an energy storage system, comprising the aforementioned combiner cabinet.

[0031] The combiner cabinet and energy storage system of the embodiments of the present application regulate the components of the combiner cabinet according to the amount of heat generated per unit time, unify the heat conduction order and the heat dissipation direction, thereby improving the overall heat dissipation performance of the combiner cabinet, thereby avoiding the use of multiple door bodies to enhance heat dissipation, and thus avoiding restrictions on the layout of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0033] Figure 1 It is a front view of the combiner cabinet according to an embodiment of the present application.

[0034] Figure 2 for Figure 1 Schematic diagram of the structure of the AA section of the middle combiner cabinet.

[0035] Figure 3This is a schematic diagram of the overall structure of the combiner cabinet according to an embodiment of the present application from the perspective of the front door when the front door and rear door are open.

[0036] Figure 4 This is a schematic diagram of the overall structure of the combiner cabinet in an embodiment of the present application from the perspective of the rear door when the front door and the rear door are open.

[0037] Figure 5 for Figure 3 Exploded structure diagram of the central combiner cabinet.

[0038] Figure 6 This is a schematic diagram of the structure of the energy storage system according to an embodiment of the present application.

[0039] Among them, the reference numerals in the figure are:

[0040] 100-combination cabinet, 101-front door, 102-rear door, 103-insulation space, 104-air inlet shutter, 105-EMS display screen, 106-partition, 107-fan, 108-air guide plate, 109-air guide channel, 110-heating unit, 111-inlet, 112-grid cable, 113-air outlet shutter, 114-second air inlet shutter, 115-cabinet, 116-indicator light, 117-second high-voltage partition, 118-4G antenna, 119-low-voltage partition, 120-first high-voltage partition, 121-emergency stop button, 12 2-first electrical installation board, 123-control relay group, 124-second electrical installation board, 125-terminal block, 126-transparent protective plate, 127-first bus, 128-first voltage switch assembly aa, 129-first voltage switch assembly bb, 130-second bus, 131-metering meter and auxiliary power low-voltage switch group, 200-first energy storage cabinet, 300-second energy storage cabinet, 1061-panel, 1062-low-voltage switch orifice plate, 1063-first high-voltage switch orifice plate, 1064-second high-voltage switch orifice plate, 1065-air inlet plate. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0043] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In the related art, the energy storage system includes a combiner cabinet and an energy storage cabinet. The combiner cabinet is a device for concentrating and distributing electric energy, mainly used for current convergence and electric energy distribution. It can converge the electric energy of the energy storage battery group and the electric energy of other power sources and then input them into the power grid to meet the power contribution of the mains power grid.

[0046] The combiner cabinet mainly integrates the display screen of the energy management system (EMS), the battery management system (BMS), the power distribution control unit, the battery pack combiner, the internal control unit, the uninterruptible power supply (UPS), the ventilation and heat dissipation unit, etc.

[0047] In the related art, the internal components of the combiner cabinet are arranged unreasonably. High-voltage control switches and low-voltage control switches are often integrated and arranged on an entire surface. Due to the size limitation of the cabinet, the position of some control switches will be arranged relatively high, resulting in low manual operability, and even requiring the use of ladders or pedals to operate; for the heat dissipation of the combiner cabinet, forced air cooling is mostly adopted, which makes the heat dissipation of the electrical parts in the cabinet uneven, and no complete heat dissipation wind guide is formed, and the heat dissipation effect is poor. In order to improve the heat dissipation effect, cabinet doors are generally opened on multiple sides of the cabinet to facilitate heat dissipation. This practice is likely to reduce the protection level of the entire combiner cabinet. However, when laying out the energy storage system, the combiner cabinet needs to be used with multiple energy storage cabinets at the same time. Since there are many door bodies opened on each side of the combiner cabinet, there is often a situation where the energy storage cabinet blocks a door body of the combiner cabinet; in addition, the direction of opening the door body is also different, which requires considering the influence of the opening and closing direction of the cabinet door on the layout position of each energy storage cabinet; therefore, in the related art, due to the excessive number of door bodies of the combiner cabinet, the layout of the entire energy storage system has certain limitations.

[0048] Since the essential reason for the excessive number of doors of the combiner cabinet and the limited layout of the energy storage system is that the heat dissipation performance of the combiner cabinet is poor, in order to solve or improve the technical problem of the poor heat dissipation performance of the combiner cabinet leading to the limited layout of the energy storage system in the related technology to a certain extent, refer to Figure 1-5 As shown, an embodiment of the present application provides a combiner cabinet including a combiner cabinet body; the combiner cabinet body includes: a plurality of heating units 110; the heating unit 110 includes at least one heating element; the plurality of heating units are arranged in sequence in the heat dissipation channel of the combiner cabinet body according to the order of the amount of heat generated per unit time; the heat conduction direction of the plurality of heating units is consistent with the movement direction of the refrigerant in the heat dissipation channel.

[0049] Specifically, see Figure 1 and 2 shown. Figure 1 It is a front view of the combiner cabinet according to an embodiment of the present application. Figure 2 for Figure 1 Schematic diagram of the structure of the AA section of the middle combiner cabinet. The combiner cabinet 100 includes a combiner cabinet body; the combiner cabinet body has at least one door body, which is not limited here. Optionally, the combiner cabinet body includes a front door 101, a rear door 102 and a heating unit 110; the heating unit 110 is inside the combiner cabinet body, and is arranged in layers in the combiner cabinet body from bottom to top according to the order of the heat dissipated per unit time, that is, the closer to the bottom of the combiner cabinet body, the higher the heat dissipated per unit time.

[0050] Exemplarily, in some embodiments, the multiple heating units 110 include heating units of a high-pressure partition and heating units of a low-pressure partition; the heat generation per unit time of the heating units of the high-pressure partition is greater than that of the heating units of the low-pressure partition; optionally, the heating units of the high-pressure partition include heating units of a second high-pressure partition 117 and heating units of a first high-pressure partition 120; it can be understood that the heat generation per unit time of the heating units of the second high-pressure partition 117 can be equal to or less than that of the heating units of the first high-pressure partition 120.

[0051] See also Figure 2 As shown, the heating unit of the low voltage partition 119 is arranged above the heating unit of the second high voltage partition 117, and the heating unit of the first high voltage partition 120 is arranged below the heating unit of the second high voltage partition 117, that is, at the bottom of the combiner cabinet body.

[0052] The movement path of the refrigerant is from the refrigerant inlet at the bottom of the front door 101 to the refrigerant outlet at the top of the rear door 102. The movement path of the refrigerant inside the combiner cabinet body is from bottom to top. Optionally, the refrigerant is air.

[0053] The heat conduction path inside the combiner cabinet body is from the heating units of the second high-voltage partition 117 and the first high-voltage partition 120 to the heating units of the low-voltage partition 119, that is, heat conduction is performed from bottom to top.

[0054] Therefore, the movement path of the refrigerant inside the main body of the combiner cabinet is consistent with the path of heat conduction inside the main body of the combiner cabinet. As a result, the heat of each heating unit will spontaneously conduct from the high heat area to the low heat area, so that the heat of each heating unit tends to be consistent, avoiding local excessive temperature; coupled with the movement direction of the refrigerant in the heat dissipation channel being consistent with the direction of heat conduction, part of the heat in the high heat area is conducted to the low heat area, and part is conducted to the refrigerant, which helps to quickly cool down the high heat area, thereby improving the overall heat dissipation performance of the combiner cabinet. In this way, by regulating the various components of the combiner cabinet according to the amount of heat generated per unit time, the heat conduction order and the heat dissipation direction are unified, thereby improving the overall heat dissipation performance of the combiner cabinet, thereby avoiding the use of multiple door bodies to enhance heat dissipation, thereby avoiding the limitation of the layout of the energy storage system. That is, the technical solution of the embodiment of the present application does not need to enhance heat dissipation by setting multiple door bodies, thereby solving the problem of limited layout of the energy storage system due to the poor heat dissipation performance of the combiner cabinet to a certain extent.

[0055] In some embodiments, the refrigerant inlet and the refrigerant outlet are arranged diagonally opposite to each other; the refrigerant outlet is provided with an exhaust device; an inlet is provided at a position corresponding to the partition and the refrigerant inlet; the partition is used to cover the frame so that the refrigerant inlet of the first door body, the inlet of the partition, the inside of the frame and the refrigerant outlet of the second door body are connected in sequence to form a heat dissipation channel.

[0056] refer to Figure 2 and 3 As shown, the front door 101 is provided with a refrigerant inlet, and the rear door 102 is provided with a refrigerant outlet. Optionally, the refrigerant inlet of the front door 101 is provided with an air inlet louver 104, and the refrigerant enters the bottom of the heating unit 110 inside the main body of the combiner cabinet from the air inlet louver 104. The rear door 102 is provided with a refrigerant outlet, and the refrigerant outlet is provided with an exhaust device and an air outlet louver 113. The exhaust device can be a fan 107. Optionally, the refrigerant inlet is provided at the lower part of the front door 101, and the refrigerant outlet is provided at the upper part of the rear door 102. Following the principle that hot air flows upward, the air flow discharged from the combiner cabinet is a hot air flow, so arranging the air outlet at the upper part of the rear door is more conducive to the discharge of hot air in the cabinet.

[0057] In the above technical solution, a door body is arranged on two oppositely arranged opening surfaces of the cabinet body, and the refrigerant inlet and the refrigerant outlet of the door body are arranged diagonally, thereby preventing the refrigerant from directly entering the refrigerant outlet from the refrigerant inlet, so that the refrigerant can fully absorb heat in the heat dissipation channel and then be discharged; the exhaust device provides the power for the refrigerant to move in the heat dissipation channel, which is convenient for forming a negative pressure at the refrigerant outlet on the upper part of the rear door, which is conducive to the discharge of hot air.

[0058] In some embodiments, the cabinet body of the junction cabinet includes: a frame, an opening surface of the frame is provided with a first door body; and a partition, which is provided with an inlet, used to cover an opening surface so that the space between the partition and the frame forms a heat dissipation space, and the space between the partition and the first door body forms an insulating space 103; the junction cabinet body has a refrigerant inlet and a refrigerant outlet; the refrigerant inlet, the heat dissipation space and the refrigerant outlet are connected to form a heat dissipation channel.

[0059] See also Figure 2 and 3 As shown, the main body of the junction cabinet includes a cabinet body 115; the cabinet body 115 includes a frame; optionally, the frame is a rectangular frame, which is not limited here. Optionally, the two opposite sides of the frame are open surfaces; the front door is provided with a refrigerant inlet, which is provided on an open surface of the frame; the cabinet also includes: a rear door, which is provided with a refrigerant outlet, which is provided on another open surface of the frame; in order to improve the protection level of the cabinet, the frame adopts an integrated molding structure; the use of an integrated molding of the frame helps to improve the protection level of the cabinet, thereby facilitating the stability of the protection level of the energy storage system using the cabinet; the partition can be provided between the rear door and the frame, or between the frame and the front door, which is not limited here.

[0060] Optionally, the front of the cabinet 115 is open and the opening is covered by the partition 106. The cabinet on the right side of the partition is provided with a front door 101, so that when the front door 101 is closed, the cabinet is divided into a heat dissipation space and a heat insulation space by the front door 101 and the partition 106. The refrigerant inlet, the heat dissipation space and the refrigerant outlet are connected to form a heat dissipation channel; the lower part of the partition 106 is provided with an inlet 111, and the inlet 111 is connected to the air inlet louver 104. Specifically, the inlet 111 corresponds to the position of the air inlet louver, so that the refrigerant can enter the heat dissipation channel inside the cabinet 115 from the air inlet louver 104 and the inlet 111 in the shortest path for heat dissipation; and the existence of the partition plays a role in insulating the heat insulation space, and at the same time, because the refrigerant can enter the heat insulation space, the temperature in the heat insulation space is guaranteed to be stable. Optionally, components that need to be insulated can be installed in the heat insulation space, that is, on the right side of the partition or on the left side of the front door. For example, a display screen.

[0061] Optionally, the hinges of the first door and the second door are arranged diagonally opposite to each other, that is, the opening directions of the first door and the second door are located on different sides of the cabinet. Figure 3 As shown, the opening directions of the front door 101 and the rear door 102 are located on the left and right sides of the frame respectively. The first door body and the second door body are arranged diagonally to facilitate the layout of the energy storage system, avoid the restriction of the door body on the layout of the energy storage system, and help the combiner cabinet provide a variety of door opening layout solutions when forming an energy storage system.

[0062] In the above technical solution, a heat dissipation space, a heat dissipation channel and a heat insulation space are formed in the cabinet by the partition, thereby improving the space utilization rate of the cabinet. The heat dissipation channel is convenient for heat dissipation, and it is also convenient to set some components with relatively low heat generation in the heat insulation space. Optionally, in order to improve the heat insulation effect, the partition is made of heat insulation material. The use of heat insulation material in the above technical solution helps to enhance the heat insulation effect of the heat insulation space.

[0063] In some embodiments, the frame is further provided with a partition plate; the first space between the partition plates is a heat dissipation space; a plurality of heating units are installed on one side of the partition plate close to the first space; and a second space is provided between the partition plate and the second door body.

[0064] Specifically, refer to Figure 4 As shown, the partition plate includes a first electrical installation board 122, a second electrical installation board 124 and a transparent protective plate 126; the first electrical installation board 122, the second electrical installation board 124 and the transparent protective plate 126 are connected in sequence from top to bottom to longitudinally divide the space in the frame into a first space facing the front door and a second space facing the rear door; the first space composed of the first space and the partition, the refrigerant inlet and the refrigerant outlet constitute a heat dissipation channel; the upper side of the first electrical installation board is connected to the refrigerant outlet through the air guide plate 108, and the air guide plate guides the refrigerant around the first electrical installation board 122 to the refrigerant outlet for discharge.

[0065] A control relay group 123 is installed on the side of the first electrical installation board 122 facing the rear door; a terminal block 125 is installed on the side of the second electrical installation board 124 facing the rear door; a heating unit of the second high-voltage partition 117 and a heating unit of the first high-voltage partition 120 are installed on the side of the transparent protective plate 126 facing the front door; and a heating unit of the low-voltage partition 119 is installed on the side of the second electrical installation board 124 facing the front door.

[0066] The above arrangement improves the scientific arrangement of the components in the combiner cabinet and effectively utilizes the space in the combiner cabinet. In addition, the first electrical installation board 122, the second electrical installation board 124 and the transparent protective plate 126 divide the space in the frame into two spaces vertically, so that the refrigerant can focus on cooling the heating unit in the independent space facing the front door, thereby improving the utilization efficiency of the refrigerant and the heat dissipation effect.

[0067] In some embodiments, the inlet of the partition, the first space, the transversely arranged air guide channel and the refrigerant outlet of the second door body are connected in sequence to form a heat dissipation channel.

[0068] See also Figure 2 As shown, the refrigerant enters the bottom of the frame from the air inlet louver 104 and the inlet 111 of the partition in the horizontal direction. After absorbing the heat at the bottom of the frame, the refrigerant moves to the top of the frame in the vertical direction, that is, the refrigerant conducts heat through the heating unit of the second high-pressure partition 117 and the heating unit of the first high-pressure partition 120 to the heating unit of the low-pressure partition 119 and enters the top of the frame; the transversely arranged air guide channel 109 guides the refrigerant at the top of the frame to enter the refrigerant outlet and be discharged. The use of the transversely arranged air guide channel 109 is conducive to guiding the refrigerant flowing vertically to the refrigerant outlet for discharge. Optionally, the refrigerant is air. Optionally, the air guide channel is made by using an air guide plate 108, and the front and rear sides of the air guide plate are respectively connected to the refrigerant outlet and the top of the frame to guide the refrigerant inside the frame to the refrigerant outlet for discharge. Optionally, an air outlet louver 113 is installed at the relative position of the outer side of the rear door 102 and the refrigerant outlet.

[0069] In some embodiments, an EMS display screen 105 is provided in the heat-insulating space, and the display screen is provided on one side of the first door body close to the interior of the cabinet. Figure 2 As shown, the EMS display screen 105 is located in the heat-insulating space, and the EMS display screen 105 is arranged on the left side of the front door 101. Optionally, an indicator light 116 and an emergency stop button 121 are also arranged on the front door 101. A 4G antenna 118 is arranged on the rear door 102.

[0070] The above technical solution sets the EMS display screen inside the cabinet, thus avoiding the long-term exposure of the EMS display screen outside the cabinet, which leads to the reduction of service life due to water seepage in the cabinet, aging of the circuit, etc.; at the same time, the EMS display screen is set on the side of the door body close to the inside of the cabinet, which is convenient for viewing through the EMS display screen during debugging or maintenance, without having to go around to the outside of the door body to view; thus, the setting of the EMS display screen improves the debugging or maintenance efficiency. In addition, the EMS display screen is set in a heat-insulating space, which meets the heat insulation requirements of the EMS display screen, avoids the influence of high temperature on the EMS display screen, and thus prolongs the service life of the EMS display screen.

[0071] In some embodiments, multiple heating units include: a first heating unit, arranged in a first partition of the cabinet; a second heating unit, including a first voltage switch component, arranged in a second partition of the cabinet; the heat generated by the second heating unit per unit time is less than that of the first heating unit; the first heating unit is close to the refrigerant inlet of the heat dissipation channel; the second heating unit is close to the refrigerant outlet of the heat dissipation channel; the heat conduction direction of the first heating unit and the second heating unit is consistent with the wind direction of the heat dissipation channel.

[0072] Optionally, the first voltage switch assembly includes a first voltage switch assembly aa128 and a first voltage switch assembly bb129; the first voltage switch assembly aa128 includes a plurality of first voltage switches a and a first busbar 127, and the plurality of first voltage switches a are connected to the grid side through the first busbar 127; the first voltage switch assembly bb129 includes a plurality of first voltage switches b and a second busbar 130, and the plurality of first voltage switches b are connected to the grid side through the second busbar 130. Optionally, the first voltage switch b is connected to the grid side through a grid cable 112. Optionally, the first voltage switch assembly aa128 is arranged at the lower part of the cabinet; the second voltage switch assembly b129 is arranged at the middle or upper part of the cabinet.

[0073] In addition, considering that the cables connected to and from the high-voltage switch components are all large-square cables and are relatively heavy, arranging all high-voltage switch groups at the bottom of the combiner cabinet can make the wiring paths of the high and low voltage switches clear and well-organized, which can save the cost of installation and subsequent maintenance.

[0074] The first heating unit includes an electric meter and an auxiliary low-voltage switch group 131 ; the electric meter and the auxiliary low-voltage switch group 131 are installed on one side of the first electrical installation panel 122 facing the front door.

[0075] In some embodiments, the partition is provided with a first hole for being sleeved on the outside of the switch of the first voltage switch assembly and a second hole for being sleeved on the outside of the switch of the second voltage switch assembly.

[0076] See also Figure 5As shown, the partition includes a panel 1061, a low-voltage switch orifice plate 1062, a first high-voltage switch orifice plate 1063, a second high-voltage switch orifice plate 1064, and an air inlet plate 1065. The panel 1061, the low-voltage switch orifice plate 1062, the first high-voltage switch orifice plate 1063, the second high-voltage switch orifice plate 1064, and the air inlet plate 1065 are connected in sequence.

[0077] After the refrigerant enters the first space between the partition and the dividing plate through the refrigerant inlet and the inlet of the air inlet plate, it moves to the upper part of the dividing plate and is blocked by the panel 1061. Then, the refrigerant is guided by the air guide plate and enters the refrigerant outlet and is discharged. The blocking effect of the panel 1061 of the partition on the refrigerant and the guiding effect of the air guide plate can form an effective convection air guide duct in the combiner cabinet, thereby making the heat dissipation in the cabinet uniform and prolonging the service life of the electrical components.

[0078] The air inlet plate 1065 is provided with an inlet 111, and the inlet 111 is provided with a second air inlet louver 114. The low-voltage switch orifice plate 1062 is provided with holes matching the switches of the metering electric meter and the auxiliary low-voltage switch group 131, and the first high-voltage switch orifice plate 1063 and the second high-voltage switch orifice plate 1064 are respectively provided with holes matching the switches of the first voltage switch assembly aa128 and the first voltage switch assembly bb129, so that the partition can be unaffected by each switch, and when the partition is attached to the opening of the frame, the holes of each partition can just fit around the periphery of each switch.

[0079] In some embodiments, the first voltage switch assembly is a preassembled switch module.

[0080] The switch module is a pre-assembled module, and the first voltage switch assembly or other switches and electrical components in the combiner cabinet are designed as separate modules, which is beneficial to improving assembly efficiency.

[0081] Optionally, the first voltage switch assembly aa128 and the first voltage switch assembly bb129 each include three groups of high-voltage switches, and the six groups of high-voltage switches are divided into two groups. Each group of switches converges through a large switch, that is, a one-to-three combination. A single group of switches can be pre-installed with the bus to form an independent switch module, and finally packaged into a module and loaded into the convergence cabinet. This simplifies the assembly process, and after most of the components are pre-installed in advance, the assembly efficiency of the entire cabinet is higher.

[0082] Pre-assembling the first voltage switch assembly into a switch module makes the assembly process simpler and more convenient. After most of the components are pre-assembled in advance, the whole cabinet can be assembled more efficiently, thereby improving the assembly efficiency.

[0083] In a second aspect, an embodiment of the present application provides an energy storage system, including a combiner cabinet.

[0084] See also Figure 6As shown, the energy storage system includes a combiner cabinet 100, a first energy storage cabinet 200 and a second energy storage cabinet 300, and the first energy storage cabinet 200, the combiner cabinet 100 and the second energy storage cabinet 300 are connected in sequence.

[0085] Optionally, the left side of the cabinet frame of the first energy storage cabinet 200, the left and right sides of the frame of the combiner cabinet, and the right side of the cabinet frame of the second energy storage cabinet 300 are integrally formed; the front and rear sides of the combiner cabinet are provided with a front door and a back. In some embodiments, one combiner cabinet of the embodiment of the present application can be used with six energy storage cabinets.

[0086] In the above technical solution, the combiner cabinet adopts a front and rear door maintenance structure, and the cover plates on the left and right sides of the combiner cabinet are integrally formed with the cabinet frame of the energy storage cabinet. While improving the protection level, the left and right sides of the combiner cabinet can also be arranged side by side close to the energy storage cabinet, reducing the space occupied by the entire energy storage system and reducing the cost of use.

[0087] The concept, principle, relevant technical features and functions of the combiner cabinet in the energy storage system of the embodiment of the present application are similar to those of the aforementioned combiner cabinet, and are not described in detail here.

[0088] Therefore, the embodiment of the present application regularizes the layout of the components in the combiner cabinet and arranges the components according to the amount of heat generated per unit time, thereby avoiding the problems of low operability of the control switch, messy high and low voltage wiring, and complex construction process of the energy storage system on site.

[0089] Again, the present application improves the heat dissipation structure of the junction cabinet through the insulation space, the first space and the second space, etc., and while carrying out targeted heat dissipation for components with larger heat dissipation, it rationally utilizes the internal space of the junction cabinet, and solves the problem of the non-directional air-guiding heat dissipation structure of the relevant junction cabinet, and the chaotic flow direction of the heat dissipation air in the cabinet, which leads to poor heat dissipation of electrical components and power equipment and affects their service life.

[0090] In addition, by setting the EMS display screen inside the cabinet, the pain points of the EMS display screen being exposed to the outdoors for a long time, resulting in a high failure rate and shortened service life, and water seepage from the door panel installation holes, which reduces debugging efficiency, are solved.

[0091] Finally, the frame of the combiner cabinet is formed in one piece, and doors are provided on the front and rear sides of the frame, thus avoiding restrictions on the layout of the energy storage system caused by doors on multiple sides of the combiner cabinet.

[0092] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A combiner cabinet, characterized in that: Including the main body of the combiner cabinet; The combiner cabinet body comprises: a plurality of heating units; the heating unit comprises at least one heating element; The plurality of heating units are sequentially arranged in the heat dissipation channel of the combiner cabinet body according to the order of the amount of heat generated per unit time; the heat conduction direction of the plurality of heating units is consistent with the movement direction of the refrigerant in the heat dissipation channel.

2. The combiner cabinet according to claim 1, characterized in that: The cabinet body of the combiner cabinet includes: A frame, wherein an opening surface of the frame is provided with a first door body; and The partition is provided with an inlet, and is used to cover the one opening surface so that the space between the partition and the frame forms a heat dissipation space, and the space between the partition and the first door body forms a heat insulation space; The combiner cabinet body has a refrigerant inlet and a refrigerant outlet; the refrigerant inlet, the heat dissipation space and the refrigerant outlet are connected to form the heat dissipation channel.

3. The combiner cabinet as claimed in claim 2, characterized in that: The frame is further provided with a partition plate; the first space between the partition plates is a heat dissipation space; the plurality of heating units are installed on one side of the partition plate close to the first space.

4. The combiner cabinet as claimed in claim 3, characterized in that: The two opposite sides of the frame are open surfaces; the first door body is provided with a refrigerant inlet, which is arranged on an open surface of the frame; the cabinet body also includes: a second door body, which is provided with a refrigerant outlet, which is arranged on another open surface of the frame; and a second space is provided between the partition plate and the second door body.

5. The combiner cabinet as claimed in claim 2, characterized in that: The refrigerant inlet and the refrigerant outlet are arranged diagonally opposite to each other; the refrigerant outlet is provided with an exhaust device; the partition is provided with an inlet at a position corresponding to the refrigerant inlet; the partition is used to cover the one opening surface of the frame so that the refrigerant inlet of the first door body, the inlet of the partition, the heat dissipation space and the refrigerant outlet of the second door body are connected in sequence to form the heat dissipation channel.

6. The combiner cabinet as claimed in claim 5, characterized in that: The partition is made of heat-insulating material; and / or the frame is a rectangular frame; and / or the frame is integrally formed; and / or the hinges of the first door body and the second door body are arranged diagonally; and / or the side of the partition plate close to the refrigerant outlet is connected to the refrigerant outlet through an air guide plate.

7. The combiner cabinet according to claim 6, characterized in that: An EMS display screen is arranged in the heat-insulating space, and the EMS display screen is arranged on a side of the first door body close to the interior of the cabinet.

8. The combiner cabinet according to any one of claims 1 to 7, characterized in that: The plurality of heating units include: A first heating unit is arranged in a first partition of the cabinet; A second heating unit, including a first voltage switch assembly, is disposed in a second partition of the cabinet; The heat generated per unit time by the second heating unit is less than that by the first heating unit; The first heating unit is close to the refrigerant inlet of the heat dissipation channel; the second heating unit is close to the refrigerant outlet of the heat dissipation channel; the heat conduction direction of the first heating unit and the second heating unit is consistent with the wind direction of the heat dissipation channel; the first voltage switch component includes multiple first voltage switches and a first bus; the multiple first voltage switches are connected to the power grid side through the first bus.

9. The combiner cabinet according to claim 8, characterized in that: The first voltage switch assembly is a pre-installed switch module.

10. An energy storage system, characterized in that: It comprises the combiner cabinet described in any one of claims 1 to 9.

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