Energy storage device

Abstract

The utility model relates to the technical field of energy storage, and particularly discloses an energy storage device which comprises a cabinet body with an accommodating space, the cabinet body comprises a cabinet base, a cabinet top cover located above the cabinet base and a supporting shell connecting the cabinet base and the cabinet top cover, the cabinet top cover, the cabinet base and the supporting shell define the accommodating space, and the accommodating space is provided with an opening which is opened forwards; the bearing frame is located in the containing space and connected to the cabinet body, and the bearing frame comprises a first bearing area used for bearing the battery pack and a second bearing area located below the first bearing area and used for bearing electrical parts; the energy storage equipment further comprises a hoisting piece which is connected to the bearing frame and upwards penetrates out of the cabinet top cover, and an inserting groove for a pallet fork of a forklift to be inserted is formed in the cabinet base. According to the energy storage equipment provided by the utility model, when the energy storage cabinet is hoisted through the hoisting piece, the load borne by the connecting part of the cabinet body and the bearing frame is smaller and is not easy to lose efficacy, and in addition, due to the design of the slot on the cabinet base, the energy storage equipment can be transported after being forked by a forklift.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to an energy storage device. Background Art

[0002] Existing energy storage equipment includes a cabinet with a receiving space and a carrier frame located in the receiving space. The carrier frame is used to carry the components of the energy storage equipment, such as battery packs, high-voltage boxes, liquid cooling systems, etc. In order to facilitate the transportation of energy storage equipment, a lifting piece is provided on the top of the cabinet, and the lifting equipment can lift the energy storage equipment through the lifting piece. The cabinet is generally a sheet metal part, and the carrier frame is heavy because it carries various components. In the current design, the lifting piece is connected to the cabinet. When the lifting equipment transports the energy storage equipment, the carrier frame is driven to move through the cabinet. The load at the connection between the cabinet and the carrier frame is large, and there is a risk of failure. In addition, there is no special slot for the forklift's fork to insert at the bottom of the energy storage equipment, so it is not easy for the forklift to lift the energy storage equipment. Utility Model Content

[0003] The purpose of the utility model is to provide an energy storage device which can be safely and reliably transported by hoisting equipment and forklifts.

[0004] To achieve the above object, the present invention provides a device comprising:

[0005] A cabinet body having a receiving space, the cabinet body comprising a cabinet base, a cabinet top cover located above the cabinet base, and a support shell connecting the cabinet base and the cabinet top cover, wherein the cabinet top cover, the cabinet base, and the support shell define the receiving space, and the receiving space has an opening open to the front;

[0006] A carrier frame located in the receiving space and connected to the cabinet, the carrier frame comprising a first carrier area for carrying a battery pack, and a second carrier area located below the first carrier area and for carrying electrical components;

[0007] The energy storage device further comprises a hanging member connected to the supporting frame and passing upward through the cabinet top cover; a slot for inserting a fork of a forklift is formed on the cabinet base.

[0008] As a further improvement of the present invention, the hanging member includes an annular portion that fits the upper surface of the cabinet top cover, and a screw portion that extends downward from the annular portion and is threadedly connected to the supporting frame.

[0009] As a further improvement of the present invention, the supporting frame includes four support columns located at its four corners, and a connecting piece connecting at least two of the support columns. There are four hanging parts, and the screw parts of the four hanging parts are respectively threadedly connected to the four support columns.

[0010] As a further improvement of the present invention, the cabinet base includes a base body, at least two support tubes connected to the base body, and a crossbeam arranged in a cross shape with at least two of the support tubes, and each of the support tubes is surrounded to form a slot.

[0011] As a further improvement of the present invention, the slot has a socket at the end in its length direction, and the energy storage device also includes a cover plate that is detachably connected to the cabinet base and closes the socket.

[0012] As a further improvement of the present invention, the supporting frame includes a partition separating the first supporting area and the second supporting area, and the energy storage device also includes a fire-fighting system for spraying fire-extinguishing materials into at least the first supporting area. The partition is tilted downward and a drainage hole is provided on its lower side.

[0013] As a further improvement of the present invention, the first carrying area includes multiple layers of placement space arranged in the up and down directions, the placement space is used to place the battery pack, the fire protection system includes a fire protection interface for connecting to an external pipeline, and a first pipeline connected to the fire protection interface, the first pipeline has multiple first injection ports respectively facing the multiple layers of the placement space.

[0014] As a further improvement of the present invention, the energy storage device also includes multiple battery packs respectively arranged in the multi-layer placement space, and the fire protection system also includes a fire box located in the second carrying area, a second pipe, a third pipe, and a fourth pipe connected to the fire box, the second pipe having multiple second injection ports respectively facing the multi-layer placement space, the third pipe connecting the fire box and the interior of the multiple battery packs, and the fourth pipe having a third injection port facing the second carrying area.

[0015] As a further improvement of the present invention, the energy storage device further includes a liquid cooling system and a liquid cooling pipeline connecting the liquid cooling system and the plurality of battery packs, and the liquid cooling system is located at the bottom of the second carrying area.

[0016] As a further improvement of the present invention, the supporting shell includes four pillars connecting the cabinet base and the cabinet top cover, a first side panel and a second side panel located at the rear side of the receiving space, and two third side panels located on both sides of the receiving space in the transverse direction. The four pillars are respectively located at the four corners of the cabinet body, and the third side panel is connected to the two pillars located on the same side in the transverse direction. The first side panel is detachably connected to the two pillars located at the rear side and is correspondingly arranged at the rear side of the first bearing area. The second side panel is detachably connected to the two pillars located at the rear side and is correspondingly arranged at the rear side of the second bearing area.

[0017] Beneficial effects:

[0018] In the energy storage device provided by the present invention, the lifting component is connected to the load-bearing frame, and the load-bearing frame is connected to the cabinet body. When the lifting device lifts the energy storage device, the load-bearing frame and the battery pack and electrical components on the load-bearing frame are lifted by the lifting component, and the cabinet body is moved by the load-bearing frame. In this way, when the energy storage cabinet is lifted by the lifting component, the load borne at the connection between the cabinet body and the load-bearing frame is small and not prone to failure. In addition, the design of the slot on the cabinet base makes it easy for a forklift to lift the energy storage device for transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A front view of an energy storage device provided in one embodiment of the present utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the energy storage device after removing part of the structure;

[0021] Figure 3 for Figure 1 A schematic cross-sectional view of the energy storage device in FIG. 1 taken along the AA direction;

[0022] Figure 4 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0023] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the central cabinet base;

[0024] Figure 6 for Figure 2 Schematic diagram of the three-dimensional structure of the middle load-bearing frame;

[0025] Figure 7 for Figure 1 Another three-dimensional structural diagram of the central cabinet base;

[0026] Figure 8 for Figure 3 Schematic diagram of the three-dimensional structure of the middle partition plate;

[0027] Figure 9 for Figure 1 Another schematic diagram of the three-dimensional structure of the energy storage device after removing part of the structure;

[0028] Figure 10 for Figure 1 A schematic diagram of the three-dimensional structure of the energy storage device after removing the first side plate and the second side plate;

[0029] Figure 11 for Figure 1 A schematic diagram of the three-dimensional structure of the energy storage device, wherein the door is in an open state;

[0030] Figure 12 for Figure 1 Another schematic diagram of the three-dimensional structure of the energy storage device in FIG. 1 , wherein the door is in an open state;

[0031] Figure 13 for Figure 1 Another three-dimensional structural schematic diagram of the energy storage device in the embodiment, wherein the door is in an open state. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings. However, this embodiment does not limit the present invention, and any modifications to the mechanism, method, or function made by a person skilled in the art based on this embodiment are all within the scope of protection of the present invention.

[0033] Terms used herein to denote relative spatial positions, such as "upper," "lower," "left," "right," "front," and "back," are used for ease of explanation to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It should be understood that, depending on the placement of the product, these terms may be intended to encompass orientations other than those depicted in the drawings and should not be construed as limitations on the claims. Furthermore, the descriptor "horizontal" as used herein does not necessarily mean perpendicular to gravity, although a certain degree of tilt is permitted.

[0034] like Figure 1-3 As shown, an embodiment of the present invention provides an energy storage device 100 , which includes a cabinet 10 having a receiving space 11 , and a support frame 20 located in the receiving space 11 and connected to the cabinet 10 .

[0035] It should be noted that, in this article, the up and down directions refer to the energy storage device 100 being in the Figure 1 The vertical direction in the state shown is the horizontal direction of the energy storage device 100. Figure 1 The left and right directions in the state shown are the front and back directions of the energy storage device 100. Figure 3 The left and right directions in the shown state, where the left side is the front side and the right side is the rear side.

[0036] The cabinet body 10 includes a cabinet base 12, a cabinet top cover 13 located above the cabinet base 12, and a support shell 14 connecting the cabinet base 12 and the cabinet top cover 13. The cabinet top cover 13, the cabinet base 12 and the support shell 14 define the above-mentioned receiving space 11, and the receiving space 11 has an opening open to the front.

[0037] The carrier rack 20 is used to carry various components and is provided with a first carrying area 21 for carrying the battery pack 60 and a second carrying area 22 located below the first carrying area 21 and for carrying electrical components. The first carrying area 21 and the second carrying area 22 are arranged in the up and down direction, which can reduce the floor space required for the energy storage device 100.

[0038] The energy storage device 100 may also include a door 30 rotatably connected to the front of the cabinet 10 for opening and closing the opening of the storage space 11. The door 30 may specifically include two parts: a first door 31 for correspondingly opening and closing the first loading area 21, and a second door 32 for correspondingly opening and closing the second loading area 22. The aforementioned electrical components should be understood as at least partial modules of the high-voltage system, liquid cooling system, and fire protection system.

[0039] Continue to cooperate with reference Figure 4-7 As shown, the energy storage device 100 further includes a lifting member 40 connected to the support frame 20 and extending upwardly through the cabinet top cover 13. The cabinet base 12 is formed with a slot 121 for inserting a forklift's fork. A lifting device (such as a crane) can connect to the portion of the lifting member 40 extending upwardly through the cabinet top cover 13, and use the lifting member 40 to lift the entire energy storage device 100 for movement. Furthermore, the forklift's fork can be inserted into the slot 121 in the cabinet base 12, lifting the entire energy storage device 100 for transportation.

[0040] In this embodiment, since the lifting member 40 is connected to the carrier frame 20, and the carrier frame 20 is connected to the cabinet 10, when the lifting equipment lifts the energy storage device 100, the carrier frame 20 and the battery pack 60 and electrical components on the carrier frame 20 are lifted by the lifting member 40, and the cabinet 10 is moved by the carrier frame 20. Since the cabinet 10 is lighter than the carrier frame 20 and the components on the carrier frame 20, the energy storage device 100 is lifted in the above manner. The load borne at the connection between the cabinet 10 and the carrier frame 20 is small and less likely to fail. In addition, the design of the slot 121 on the cabinet base 12 makes it easier for a forklift to lift the energy storage device 100 for transportation.

[0041] Specifically, the hanging part 40 includes an annular portion 41 that fits against the upper surface of the cabinet top cover 13, and a screw portion 42 that extends downward from the annular portion 41 and is threadedly connected to the supporting frame 20. It can be imagined that the supporting frame 20 is provided with a threaded hole 23 that cooperates with the screw portion 42. When connecting the hanging part 40 to the supporting frame 20, it is necessary to align the screw portion 42 with the threaded hole 23 on the supporting frame 20 and then rotate the hanging part 40 to move the hanging part 40 downward until the annular portion 41 is tightly fitted against the upper surface of the cabinet top cover 13. The annular portion 41 facilitates a reliable connection between the hanging equipment and the hanging part 40. In other embodiments, the annular portion 41 can be replaced with other structures that can form a reliable connection with the hanging equipment, which is not limited here.

[0042] The support frame 20 includes four support columns 24 located at its four corners, a connector 25 connecting at least two of the support columns 24, and four lifting members 40. The screw portions 42 of the four lifting members 40 are respectively threadedly connected to the four support columns 24. Providing four lifting members 40 and positioning them at the four corners of the support frame 20 makes the lifting equipment more reliable and stable when lifting the energy storage device 100.

[0043] Specifically, the four support columns 24 are the first support column 241, the second support column 242, the third support column 243, and the fourth support column 244. The first support column 241 and the second support column 242 are located on the front side of the carrier frame 20, and the third support column 243 and the fourth support column 244 are located on the rear side of the carrier frame 20. The first support column 241 and the third support column 243 are located on the same side in the transverse direction, and the second support frame and the fourth support frame are located on the same side in the transverse direction.

[0044] The cabinet base 12 includes a base body 122, at least two support tubes 123 connected to the base body 122, and a crossbeam 124 arranged in a cross shape with the at least two support tubes 123. A plurality of crossbeams 123 can be arranged along the length direction of the support tube. Each support tube 123 is surrounded by a slot 121, that is, the interior of the support tube 123 is hollow. When a forklift needs to lift the energy storage device 100, its fork is specifically inserted into the support tube 123. Generally, a forklift has at least two forks, and for this, at least two support tubes 123 are provided, that is, there are also at least two slots 121. The two forks are inserted into the two slots 121 and rise, and the energy storage device 100 can be smoothly erected and moved. The crossbeam 124 and the support tube 123 are arranged in a cross shape, which can improve the overall structural strength of the cabinet base 12.

[0045] As will be understood, slot 121 has a socket 1211 at its longitudinal end. A forklift fork is inserted into slot 121 along the length of slot 121 through socket 1211. Energy storage device 100 also includes a cover 15 that is detachably connected to cabinet base 12 and seals socket 1211. Under normal circumstances, cover 15 seals socket 1211 to prevent foreign matter from entering slot 121. When a forklift fork needs to be inserted into slot 121, cover 15 is removed from cabinet base 12, allowing the fork to be inserted into slot 121 through socket 1211.

[0046] Continue to cooperate with reference Figure 8As shown, the carrier 20 includes a partition 50 that separates the first and second loading areas 21, 22. The partition 50 separates the first and second loading areas 21, 22. If a fire occurs in one of the first and second loading areas 21, 22, it will not spread to the other. Generally speaking, the first loading area 21, which is used to house the battery packs 60, is more likely to have a fire. Therefore, the energy storage device 100 also includes a firefighting system for spraying fire-extinguishing material into at least the first loading area 21. Furthermore, the partition 50 is tilted downward, with one side higher than the other. A drainage hole 51 is provided on the lower side of the partition 50. If a fire occurs in the first loading area 21, the firefighting system sprays fire-extinguishing material into the first loading area 21. The fire-extinguishing material then lands on the partition 50 and flows along the tilt of the partition 50 to the drainage hole 51, ultimately flowing out of the first loading area 21 through the drainage hole 51. Two or more drainage holes 51 may be provided.

[0047] The carrier frame 20 may further include two sealing plates 26 located on either side of the first carrier area 21 in the transverse direction. The sealing plates 26 can further seal the first carrier area 21 to prevent the fire in the first carrier area 21 from spreading outward. The two sealing plates 26 are connected to the support columns 24. Specifically, one of the two sealing plates 26 connects the first support column 141 and the third support column 143, and the other connects the second support column 242 and the fourth support column 244.

[0048] Continue to cooperate with reference Figure 9-11 As shown, the first loading area 21 includes multiple layers of storage spaces 211 arranged in a vertical direction. The energy storage device 100 also includes multiple battery packs 60, each housed in the multiple layers of storage spaces 211. The fire protection system includes a fire protection interface 71 for connecting to external piping, and a first pipeline 72 connected to the fire protection interface 71. The first pipeline 72 extends upward from the fire protection interface 71 and has multiple first injection ports facing the multiple layers of storage spaces 211. When a fire occurs in the first loading area 21, firefighting liquid (such as water) can be introduced into the first pipeline 72 through the fire protection interface 71 and sprayed from the multiple first injection ports of the first pipeline 72 into each storage space 211.

[0049] Specifically, a plurality of placement racks 212 for placing batteries are provided in the first carrying area 21, and the placement space 211 is located between two adjacent placement racks 212 and above the top-most placement rack. The placement rack 212 is specifically connected to the four support columns 24. It can be understood that the placement rack 212 is connected to the four support columns 24, which strengthens the structural strength of the carrier 20 as a whole. The above-mentioned connecting member 25 connects two or more support columns 24 to form a carrier 20 with the four support columns 24. A plurality of bearing plates for carrying electrical components are specifically provided in the second carrying area 22, and the bearing plates are connected to the four support columns 24, which also play a role in strengthening the structural strength of the carrier 20 as a whole.

[0050] The energy storage device 100 also includes a control system, which includes a battery management system and an energy management system. The battery pack 60 includes a housing and a battery pack composed of multiple battery cells located within the housing. The battery management system is located inside the battery pack 60 and can monitor the remaining power and operating status of the battery pack, collect the voltage, current and temperature of the battery pack and battery cells in real time, and avoid overcharging and over-discharging of the battery pack 60. The energy management system can be connected to the door body 30 and communicate with the battery management system, energy storage converter, etc. in real time. The energy management system is used to arrange the charging and discharging strategy of the energy storage device 100 according to actual conditions to achieve efficient use of energy.

[0051] Furthermore, the fire protection system includes a fire protection box 73 located within the electrical compartment, a second pipeline 74, a third pipeline 75, and a fourth pipeline 76 connected to the fire protection box 73. The second pipeline 74 has multiple second injection ports facing the multi-layer storage space 211. The third pipeline 75 connects the fire protection box 73 with the interior of the multiple battery packs 60. The fourth pipeline 76 has a third injection port facing the second loading area 22. The fire protection box 73 is used to store perfluorohexanone or other fire protection agents. A multi-way valve may be installed between the fire protection box 73 and the second pipeline 74, the third pipeline 75, and the fourth pipeline 76. The multi-way valve is used to control whether the fire protection agent in the fire protection box 73 flows to the second pipeline 74, the third pipeline 75, and the fourth pipeline 76. The fire-fighting agent in the fire-fighting box 73 can be sprayed into the multi-layer storage space 211 through the second pipe 74, or sprayed into the interior of multiple battery packs 60 through the third pipe 75, or sprayed into the second loading area 22 through the fourth pipe 76. In this way, the fire-fighting system can effectively extinguish fires occurring in the first loading area 21 or the second loading area 22.

[0052] It is conceivable that sensors for detecting parameters such as smoke, temperature, carbon monoxide, and hydrogen may be provided inside the battery pack 60 to sound an alarm when the battery pack 60 thermally runs away.

[0053] Energy storage device 100 also includes a liquid cooling system 80 and a liquid cooling line 81 connecting the liquid cooling system 80 and the multiple battery packs 60. Coolant circulates through the liquid cooling line 81 between the multiple battery packs 60 and the liquid cooling system 80, thereby controlling the temperature of the battery packs 60 within a reasonable range. Specifically, the liquid cooling system 80 is located at the bottom of the second loading area 22.

[0054] The second carrying area 22 includes a high-voltage system, which specifically includes components such as an energy storage converter, a high-voltage box, and a Suk circuit breaker.

[0055] Continue to cooperate with reference Figure 12-13 As shown, the support shell 14 includes four pillars 141 connecting the cabinet base 12 and the cabinet top cover 13, a first side panel 142 and a second side panel 143 located at the rear side of the receiving space 11, and two third side panels 144 located on both sides of the receiving space 11 in the transverse direction. The four pillars 141 are respectively located at the four corners of the cabinet body 10, wherein the third side panel 144 is connected to the two pillars 141 located on the same side in the transverse direction, the first side panel 142 is detachably connected to the two pillars 141 located at the rear side and is correspondingly arranged at the rear side of the first load-bearing area 21, and the second side panel 143 is detachably connected to the two pillars 141 located at the rear side and is correspondingly arranged at the rear side of the second load-bearing area 22. The first side panel 142 and the second side panel 143 can be removed from the pillars 141 separately to facilitate relevant personnel to perform maintenance or other operations on the conditions in the first load-bearing area 21 or the second load-bearing area 22. The second door 32 at the front side of the second carrying area 22 and the second side plate 143 at the rear side may both be provided with ventilation holes to facilitate heat dissipation in the second carrying area 22 .

[0056] Specifically, the four pillars 141 are respectively a first pillar 1411, a second pillar 1412, a third pillar 1413, and a fourth pillar 1414. The first pillar 1411 and the second pillar 1412 are located at the front side of the cabinet 10, and the third pillar 1413 and the fourth pillar 1414 are located at the rear side of the cabinet 10. The first side panel 142 and the second side panel 143 are both detachably connected to the third pillar 1413 and the fourth pillar 1414. Of the two third side panels 144, one connects the first pillar 1411 and the third pillar 1413, and the other connects the second pillar 1412 and the fourth pillar 1414. It is understood that the third side panel 144 and the pillar 141 are also detachably connected.

[0057] It should be understood that although this specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0058] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An energy storage device comprising: A cabinet body having a receiving space, the cabinet body comprising a cabinet base, a cabinet top cover located above the cabinet base, and a support shell connecting the cabinet base and the cabinet top cover, wherein the cabinet top cover, the cabinet base, and the support shell define the receiving space, and the receiving space has an opening open to the front; A carrier frame located in the receiving space and connected to the cabinet, the carrier frame comprising a first carrier area for carrying a battery pack, and a second carrier area located below the first carrier area and for carrying electrical components; It is characterized in that the energy storage device also includes a hanging part connected to the supporting frame and passing upward through the cabinet top cover, and a slot for inserting a fork of a forklift is formed on the cabinet base.

2. The energy storage device according to claim 1, characterized in that The hanging member includes an annular portion that fits the upper surface of the cabinet top cover, and a screw portion that extends downward from the annular portion and is threadedly connected to the supporting frame.

3. The energy storage device according to claim 2, characterized in that The support frame includes four support columns located at its four corners, and a connector connecting at least two of the support columns. Four hanging parts are provided, and the screw parts of the four hanging parts are respectively threadedly connected to the four support columns.

4. The energy storage device according to claim 1, characterized in that The cabinet base includes a base body, at least two supporting tubes connected to the base body, and a crossbeam arranged in a cross shape with the at least two supporting tubes, and each supporting tube is surrounded to form a slot.

5. The energy storage device according to claim 1, characterized in that The slot has a socket at the end in the length direction thereof, and the energy storage device further includes a cover plate detachably connected to the cabinet base and closing the socket.

6. The energy storage device according to claim 1, characterized in that The support frame includes a partition separating the first support area and the second support area. The energy storage device also includes a fire protection system for spraying fire extinguishing materials into at least the first support area. The partition is tilted downward and has a drainage hole on its lower side.

7. The energy storage device according to claim 6, characterized in that The first carrying area includes multiple layers of placement space arranged in the up and down directions, and the placement space is used to place the battery pack. The fire protection system includes a fire protection interface for connecting to an external pipeline and a first pipeline connected to the fire protection interface. The first pipeline has multiple first injection ports respectively facing the multiple layers of the placement space.

8. The energy storage device according to claim 7, characterized in that: The energy storage device also includes multiple battery packs respectively arranged in the multi-layer placement spaces. The fire protection system also includes a fire box located in the second carrying area, a second pipe, a third pipe, and a fourth pipe connected to the fire box. The second pipe has multiple second injection ports respectively facing the multi-layer placement spaces. The third pipe connects the fire box and the interior of the multiple battery packs. The fourth pipe has a third injection port facing the second carrying area.

9. The energy storage device according to claim 8, characterized in that The energy storage device further includes a liquid cooling system and a liquid cooling pipeline connecting the liquid cooling system and the plurality of battery packs. The liquid cooling system is located at the bottom of the second carrying area.

10. The energy storage device according to claim 1, characterized in that The supporting shell includes four pillars connecting the cabinet base and the cabinet top cover, a first side panel and a second side panel located at the rear side of the receiving space, and two third side panels located on both sides of the receiving space in the transverse direction. The four pillars are respectively located at the four corners of the cabinet body, and the third side panel is connected to the two pillars located on the same side in the transverse direction. The first side panel is detachably connected to the two pillars located at the rear side and is correspondingly arranged at the rear side of the first bearing area. The second side panel is detachably connected to the two pillars located at the rear side and is correspondingly arranged at the rear side of the second bearing area.

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