Battery box and energy storage device

Abstract

The utility model relates to a kind of battery box and energy storage equipment, involve energy storage battery technical field.The utility model provides a kind of battery box, including lower cabinet and front wall, lower cabinet is provided with two opposite drainage parts, the drainage part is relatively located at the front wall. By setting two drainage parts, on the one hand, two drainage parts are set on lower cabinet relative to front wall, such setting does not occupy the space of entire battery box, avoids space waste;On the other hand, by separately setting two drainage parts, the passage in drainage part is separately connected with the two ends of water nozzle and flow channel, so that the liquid cooling air-tightness welding of battery box is separated from the whole box air-tightness welding of battery box, i.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage battery technical field, specifically, relate to a battery box and energy storage equipment. BACKGROUND

[0002] At present, the standard C box commonly used by large truck is generally made of low edge beam profile box body or stamping box body, wherein the inlet and outlet nozzle of the bottom plate of the profile box body is usually welded directly on the bottom plate of the lower box body or a flow channel is welded to guide to the front wall plate.

[0003] The inventor found that, on the one hand, the inlet and outlet nozzle is welded directly on the bottom plate, so the nozzle needs to extend to the outside of the front wall plate, which occupies a large space. On the other hand, the bottom flow channel is guided to the front wall plate by welding a flow channel, and the bottom plate shares a weld with the box body of the front wall plate. When the battery pack leaks, it is difficult to determine whether the leakage source is the weld of the front wall plate box or the bottom plate, so timely repair cannot be carried out. SUMMARY

[0004] The utility model discloses a battery box and energy storage equipment, which can avoid space waste and mutual influence during the air tightness detection of the battery box in the later period.

[0005] The embodiment of the utility model can be realized as follows:

[0006] In a first aspect, the utility model provides a battery box, which comprises a lower box body, two opposite flow guide parts are arranged on the lower box body, and a flow channel is arranged in the lower box body; a channel is arranged in each of the two flow guide parts, and a nozzle is communicated with one end of the channel; the other end of one channel is communicated with one end of the flow channel, and the other end of the other channel is communicated with the other end of the flow channel.

[0007] A front wall plate is arranged on the front side of the lower box body, and the flow guide parts are located opposite to the front wall plate.

[0008] Optionally, an assembly opening is arranged on the flow guide part and faces outward, the assembly opening is communicated with the channel, and the nozzle is arranged at the assembly opening.

[0009] Optionally, an inlet and an outlet are arranged opposite to each other on the front side of the lower box body, the inlet is communicated with one end of the flow channel, and the outlet is communicated with the other end of the flow channel.

[0010] Optionally, one of the flow guide parts is arranged opposite to the inlet, and the channel is communicated with the inlet.

[0011] The other flow guide part is arranged opposite to the outlet, and the channel is communicated with the outlet.

[0012] Optionally, the lower box comprises a bottom plate, the front side of the bottom plate is provided with the front wall, the opposite two sides of the bottom plate are provided with side beams, and the flow channel is arranged in the bottom plate;

[0013] The two drainage portions are sealingly connected with the bottom plate and respectively communicate with two ends of the flow channel; and the inner side walls of the two drainage portions are sealingly connected with the inner walls of the two side beams.

[0014] Optionally, the inner side walls of the drainage portions are welded with the inner walls of the oppositely arranged side beams, and the bottom walls of the drainage portions are welded with the top walls of the bottom plate, and a liquid cooling welding seam is formed accordingly;

[0015] The outer side walls and the top walls of the drainage portions are welded with the front wall, and a gas-tight welding seam is formed accordingly.

[0016] Optionally, the drainage portion comprises a shell, the shell is provided with a cavity, and the bottom wall and the inner side wall of the shell are both open ends;

[0017] The inner side wall of the shell is connected with the side beam, so that the cavity forms the channel.

[0018] Optionally, the bottom wall of the shell is arranged opposite to the inlet or the outlet of the lower box, so that the channel communicates with the inlet or the outlet.

[0019] Optionally, both sides of the front wall are provided with mounting ports, and the drainage portion is arranged in the mounting port.

[0020] In a second aspect, the utility model provides a kind of energy storage equipment, comprising: multiple any one described battery box above;

[0021] Mounting structure, and multiple described battery box is arranged on the mounting structure.

[0022] The battery box and the energy storage equipment provided by the embodiments of the utility model have the following beneficial effects:

[0023] By arranging two drainage portions, on the one hand, the two drainage portions are arranged on the lower box opposite to the front wall, which does not occupy the space of the entire battery box and avoids space waste; on the other hand, by separately arranging the two drainage portions, the channel in the drainage portion separately communicates with the water nozzle and the two ends of the flow channel, so as to separate the liquid cooling gas-tight welding of the battery box from the overall gas-tight welding of the battery box, i.e., the gas-tight related welding seam of the front wall and the lower box no longer shares the same welding seam, which avoids mutual influence during the gas-tight detection of the battery box in the later period and can distinguish the leakage source. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope. Other related drawings can also be obtained by those skilled in the art without creative labor on the premise of not paying creative labor.

[0025] Figure 1 An exploded view of the battery box provided in the present embodiment;

[0026] Figure 2 A structural schematic view of the lower box body provided in the present embodiment;

[0027] Figure 3 A structural schematic view of the flow guide provided in the present embodiment;

[0028] Figure 4 A structural schematic view of the welding of the lower box body and the flow guide provided in the present embodiment;

[0029] Figure 5 A structural schematic view of the welding of the lower box body and the flow guide and the front wall provided in the present embodiment;

[0030] Figure 6 A partial schematic view of the welding of the lower box body, the flow guide and the front wall provided in the present embodiment.

[0031] Icon: 010-battery box; 100-lower box body; 101-inlet; 102-outlet; 110-bottom plate; 120-side beam; 130-airtight weld; 200-front wall; 210-mounting port; 220-electrical mounting port; 230-front electrical mounting plate; 300-flow guide; 301-assembly port; 310-housing; 320-cavity; 330-liquid cooling weld; 400-water nozzle; 500-rear wall; 600-upper box body; 700-battery module. DETAILED DESCRIPTION

[0032] With the development of new energy technology, battery technology has been widely applied in vehicles, such as mine trucks, buses or heavy trucks. Among them, the power source of electric mine trucks comes from batteries. Since mine trucks are heavy and carry heavy loads, the required battery size and quantity are much higher than ordinary electric trucks.

[0033] At present, the standard C box commonly used in large trucks is generally made of low side beam profile box body or stamping box body. Among them, the inlet and outlet water nozzles of the bottom plate of the profile box body are usually directly welded on the bottom plate of the lower box body or welded on a flow channel leading to the front wall.

[0034] The inventor has found that, on the one hand, if the water inlet and outlet nozzle is directly welded on the bottom plate, the nozzle needs to be extended to the outside of the front wall, which needs to occupy a large space. On the other hand, the bottom flow channel is guided to the front wall by welding a flow channel, and the bottom plate shares a welding seam with the box body of the front wall. When the battery pack leaks, it is difficult to effectively analyze whether the leakage source is the welding seam of the front wall box body or the bottom plate, so timely repair cannot be performed.

[0035] To solve the above problems, the utility model provides a battery box 010 and energy storage equipment, which can avoid space waste and avoid mutual influence during the air tightness detection of the battery box 010 in the later period, thereby improving the above problems.

[0036] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the scope of protection of the utility model.

[0038] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] In the description of the utility model, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0040] In addition, if the terms "first", "second" and the like appear, they are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0041] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.

[0042] The overall structure, working principle and technical effects of the battery box 010 and the energy storage device are described in detail below through embodiments and in combination with the drawings.

[0043] Please refer to Figure 1 The battery box 010 provided by the utility model is applied to a new energy energy storage device.

[0044] Among them, the energy storage device can be an energy storage device of a new energy vehicle; for example, large vehicles such as buses, heavy trucks, and mine trucks.

[0045] In this embodiment, the energy storage device includes a mounting structure and a plurality of battery boxes 010, and the plurality of battery boxes 010 are arranged on the mounting structure.

[0046] Among them, the mounting structure is fixed with the vehicle, and the mounting structure can be a placing rack (not shown in the figure), and the plurality of battery boxes 010 are fixed on the mounting structure through the side beam 120.

[0047] Please refer to Figure 1 and Figure 2 The battery box 010 provided by the utility model includes a lower box body 100 and a front wall 200; the lower box body 100 is provided with two opposite drainage parts 300, and the lower box body 100 is provided with a flow channel; the two drainage parts 300 are both provided with a channel, and one end of the channel is communicated with a water nozzle 400; the channel of one of the drainage parts 300 is communicated with one end of the flow channel, and the channel of the other drainage part 300 is communicated with the other end of the flow channel; the front wall 200 is arranged on the front side of the lower box body 100, and the drainage parts 300 are oppositely arranged at the front wall 200.

[0048] It can be understood that by arranging two drainage parts 300, on the one hand, the two drainage parts 300 are arranged on the lower box body 100 opposite to the front wall 200, so that the space of the entire battery box 010 is not occupied, and space waste is avoided; on the other hand, by separately arranging two drainage parts 300, the channel in the drainage part 300 is separately communicated with the water nozzle 400 and the two ends of the flow channel, so as to separate the liquid cooling gas tightness welding of the battery box 010 and the whole box gas tightness welding of the battery box 010, avoid mutual influence when the battery box 010 is subjected to gas tightness detection in the later period, and the leakage source can be distinguished.

[0049] In this embodiment, please refer to Figure 1The battery box 010 comprises a lower box body 100, a front wall 200, a rear wall 500, an upper box body 600 and a battery module 700. The front wall 200 is sealingly arranged at the front side of the lower box body 100. The rear wall 500 is sealingly arranged at the rear side of the lower box body 100. The lower box body 100, the front wall 200 and the rear wall 500 form an installation cavity for accommodating the battery module 700. The battery module 700 is fixed to the top wall of the lower box body 100. The upper box body 600 is fixed to the lower box body 100, the front wall 200 and the rear wall 500 to form the whole battery box 010.

[0050] In the embodiment, the battery box 010 comprises a lower box body 100.

[0051] In the embodiment, please refer to Figure 2 and Figures 4-6 The lower box body 100 comprises a bottom plate 110 and two side beams 120. The bottom plate 110 is a rectangular plate structure. The side beams 120 are arranged at the opposite sides of the bottom plate 110. A flow channel is arranged on the bottom plate 110. The flow channel is used for circulating cooling medium to cool the battery module 700 arranged in the battery box 010.

[0052] Optionally, the two side beams 120 can be designed as high side beams 120.

[0053] In the embodiment, please refer to Figure 2 The front side of the bottom plate 110 is provided with opposite circular inlet 101 and circular outlet 102. The inlet 101 is in communication with one end of the flow channel. The outlet 102 is in communication with the other end of the flow channel.

[0054] One of the flow guide parts 300 is arranged opposite to the inlet 101. The channel is in communication with the inlet 101. The other flow guide part 300 is arranged opposite to the outlet 102. The channel is in communication with the outlet 102.

[0055] It can be understood that one of the flow guide parts 300 introduces cooling liquid. The cooling liquid enters the flow channel from the inlet 101, cools the battery module 700 in the battery pack, and then flows out of the outlet 102 and is introduced out of the other flow guide part 300.

[0056] In the embodiment, the battery box 010 further comprises a front wall 200.

[0057] In the embodiment, please refer to Figure 1 and Figure 2 The front wall 200 is arranged at the front side of the lower box body 100. The front wall 200 is arranged at the front side of the bottom plate 110 of the lower box body 100. The two sides of the front wall 200 are connected with the side beams 120 at the two sides of the lower box body 100, respectively.

[0058] In the embodiment, please refer to Figure 1 and Figure 2The front bulkhead 200 is provided with an electrical installation opening 220, which is used to install a front electrical installation plate 230, and the front electrical installation plate 230 is electrically connected with the battery module 700 inside the battery box 010.

[0059] In the embodiment, please refer to Figure 2 The front bulkhead 200 is provided with an electrical installation opening 220, which is used to install a front electrical installation plate 230, and the front electrical installation plate 230 is electrically connected with the battery module 700 inside the battery box 010.

[0060] It can be understood that the front bulkhead 200 is separately provided with the installation opening 210 for setting the drainage part 300, and the installation opening 210 leaves a position for installing the drainage part 300, so that the setting does not occupy the space of the entire battery box 010, and the waste of the space of the battery box 010 can be avoided.

[0061] The front bulkhead 200 is welded with the bottom plate 110 and the side beam 120 of the lower box body 100 to ensure the air tightness of the battery pack.

[0062] The front bulkhead 200 can be bent into shape by adopting a sheet metal bending scheme.

[0063] In the embodiment, the battery box 010 includes the drainage part 300.

[0064] The drainage part 300 is provided with a channel for separately connecting the water nozzle 400 and the flow channel, so that the cooling liquid can enter the flow channel of the bottom plate 110 of the lower box body 100 through the drainage part 300.

[0065] In the embodiment, please refer to Figure 1 and Figure 2 and Figure 4 and Figure 5 The drainage part 300 includes two, one of which is arranged relative to the inlet 101 of the bottom plate 110, and the channel is in communication with the inlet 101; the other is arranged relative to the outlet 102 of the bottom plate 110, and the channel is in communication with the outlet 102. It can be understood that one of the drainage parts 300 is used to guide the cooling liquid into the flow channel, and the other is used to guide the cooled cooling liquid.

[0066] In the embodiment, please refer to 2 and Figure 5 The two drainage parts 300 are sealingly connected with the bottom plate 110 and are in communication with two ends of the flow channel respectively; the inner walls of the two drainage parts 300 are sealingly connected with the inner walls of the two side beams 120 respectively.

[0067] Specifically, the two drainage portions 300 are arranged in abutment with the side beams 120, the inner side walls of the two drainage portions 300 are respectively in sealing connection with the inner walls of the two side beams 120, the bottom walls of the two drainage portions 300 are respectively in sealing connection with the corresponding bottom plates 110, and the outer side walls and the top wall of the two drainage portions 300 are in sealing connection with the front wall 200.

[0068] Of course, in other embodiments, the drainage portion 300 can also be arranged without abutment with the side beam 120, and the drainage portion 300 can be welded with the front wall 200.

[0069] In the embodiment, please refer to Figure 6 , the inner side wall of the drainage portion 300 is welded with the inner wall of the oppositely arranged side beam 120, the bottom wall of the drainage portion 300 is welded with the top wall of the bottom plate 110, and a liquid cooling weld 330 is formed accordingly; the outer side wall and the top wall of the drainage portion 300 are welded with the front wall 200, and a gas-tight weld 130 is formed accordingly.

[0070] It can be understood that the front wall 200 is separately welded with the bottom plate 110 and the side beam 120 of the lower box body 100, which is the gas-tight weld 130 related to the overall gas-tightness of the battery box 010; the drainage portion 300 is separately welded with the lower box body 100, which is the liquid cooling weld 330 related to the liquid cooling gas-tightness of the battery box 010; the liquid cooling weld 330 and the gas-tight weld 130 are separated by the arrangement of the drainage portion 300, which can also be understood as that the welding related to the liquid cooling and the welding related to the gas-tightness of the battery box 010 are partitioned and welded without using the same weld. Such an arrangement can avoid mutual influence during the later gas-tightness detection of the battery box 010, and can distinguish the leakage source.

[0071] In the embodiment, please refer to Figure 2 and Figure 3 , the drainage portion 300 is provided with an assembly opening 301 facing outward, the assembly opening 301 is in communication with the channel, and the water nozzle 400 is arranged at the assembly opening 301. It can be understood that the assembly opening 301 is used for mounting the water nozzle 400.

[0072] In the embodiment, please refer to Figure 3 , the drainage portion 300 comprises a shell 310, the shell 310 is provided with a cavity 320, the cavity 320 has open ends facing the bottom wall and the inner side wall of the shell 310; the shell 310 is provided with an assembly opening 301 facing outward, the assembly opening 301 is in communication with the channel, and the water nozzle 400 is arranged at the assembly opening 301. The inner side wall of the shell 310 is connected with the side beam 120, so that the cavity 320 forms the channel. The bottom wall of the shell 310 is arranged opposite the inlet 101 or the outlet 102 of the bottom plate 110, so that the channel is in communication with the inlet 101 or the outlet 102.

[0073] Therefore, it can be understood that the inner side wall of the drainage part 300 is separately welded with the inner wall of the side beam 120 of the bottom plate 110, the bottom wall of the drainage part 300 is separately welded with the top wall of the bottom plate 110, and both form the liquid cooling welding seam 330; so as to realize the welding related to liquid cooling of this part of the battery box 010. The top wall and the outer side wall of the drainage part 300 are separately welded with the inner wall of the mounting port 210 of the front wall 200, the two side walls of the front wall 200 are welded with the two inner walls of the side beam 120, and both form the airtight welding seam 130; so as to realize the welding related to airtightness of this part of the battery box 010. The drainage part 300 of the shell structure 310 is thus arranged, which is simple and light in structure, can realize the weight reduction of the whole battery box 010, and can reduce the assembly difficulty.

[0074] Of course, in other embodiments, the drainage part 300 can also be a columnar body with a channel arranged therein, which is provided with an assembly port 301 facing the outer side, the assembly port 301 is communicated with the channel, and the water nozzle 400 is arranged at the assembly port 301. The channel port at the bottom of the drainage part 300 is arranged opposite to the inlet 101 or the outlet 102 of the bottom plate 110.

[0075] Therefore, it can be understood that the inner side wall of the drainage part 300 is separately welded with the inner wall of the side beam 120 of the bottom plate 110, the bottom wall of the drainage part 300 is separately welded with the top wall of the bottom plate 110, and both form the liquid cooling welding seam 330; so as to realize the welding related to liquid cooling of this part of the battery box 010. The top wall and the outer side wall of the drainage part 300 are separately welded with the inner wall of the mounting port 210 of the front wall 200, the two side walls of the front wall 200 are welded with the two inner walls of the side beam 120, and both form the airtight welding seam 130; so as to realize the welding related to airtightness of this part of the battery box 010.

[0076] Optionally, the drainage part 300 can be of a rectangular structure and other shapes that can be adapted to the whole battery box 010.

[0077] It is worth mentioning that the drainage part 300 can be made in the following three schemes. First, when the drainage part 300 is of a shell structure 310, an aluminum plate can be bent and welded to form the drainage part 300. Second, the drainage part 300 can be made of die-cast aluminum to form a hollow cuboid. Third, the drainage part 300 can also be made by machining.

[0078] The manufacturing process and technology of the battery box 010 and the energy storage equipment provided in the embodiments of the utility model are as follows: taking the welding of the drainage part 300 of the shell structure 310 with the battery box 010 as an example.

[0079] First, please refer to Figure 4The inner side wall of the drainage part 300 is welded with the inner wall of the edge beam 120, the bottom wall of the drainage part 300 is welded with the top wall of the bottom plate 110, and a liquid cooling welding seam 330 is formed; and the water nozzle 400 is welded on the assembly opening 301 of the drainage part 300, so that the battery box 010 is welded in a gas-tight manner with respect to liquid cooling.

[0080] Subsequently, please refer to Figure 5 The inner wall of the mounting opening 210 of the front plate 200 is welded with the top wall and the outer side wall of the drainage part 300, and a gas-tight welding seam 130 is formed, so that the battery box 010 is welded in a gas-tight manner with respect to the whole box.

[0081] The gas-tight welding seam 130 of the battery box 010 with respect to the whole box and the liquid cooling welding seam 330 with respect to liquid cooling are distinguished from each other, and the same welding seam is not used, so that the two are not affected by each other.

[0082] In summary, the battery box 010 and the energy storage equipment provided by the embodiments of the present application are provided with two drainage parts 300, on the one hand, the two drainage parts 300 are arranged on the lower box body 100 opposite to the front plate 200, so that the space of the whole battery box 010 is not occupied, and space waste is avoided; on the other hand, the two drainage parts 300 are separately arranged, so that the channels in the drainage parts 300 are separately connected with the two ends of the water nozzle 400 and the flow channel, so that the liquid cooling gas-tight welding of the battery box 010 and the whole box gas-tight welding of the battery box 010 are separated, that is, the gas-tight related welding seams of the front plate 200 and the lower box body 100 no longer share the same welding seam, so that the mutual influence of the battery box 010 during the gas-tight detection in the later period is avoided, and the leakage source can be distinguished.

[0083] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A battery box, characterized in that, The utility model relates to a battery box, and particularly relates to a battery box with liquid cooling function. The battery box comprises a lower box body provided with two opposite flow guide parts, and a flow channel is arranged in the lower box body; a passage is arranged in each of the two flow guide parts, and a water nozzle is communicated with one end of the passage; the other end of one of the passages is communicated with one end of the flow channel, and the other end of the other passage is communicated with the other end of the flow channel. A front wall is arranged on the front side of the lower box body, and the flow guide parts are arranged opposite to the front wall.

2. The battery pack of claim 1, wherein, An assembly opening is arranged on the flow guide part and faces outward, the assembly opening is communicated with the passage, and the water nozzle is arranged in the assembly opening.

3. The battery pack of claim 1, wherein, An inlet and an outlet are arranged opposite to each other on the front side of the lower box body, the inlet is communicated with one end of the flow channel, and the outlet is communicated with the other end of the flow channel.

4. The battery pack of claim 3, wherein, One of the flow guide parts is arranged opposite to the inlet, and the passage is communicated with the inlet. The other flow guide part is arranged opposite to the outlet, and the passage is communicated with the outlet.

5. The battery pack of claim 1, wherein, The lower box body comprises a bottom plate, the front side of the bottom plate is provided with the front wall, opposite sides of the bottom plate are provided with side beams, and the flow channel is arranged in the bottom plate. The two flow guide parts are sealingly connected with the bottom plate and are communicated with two ends of the flow channel respectively, and the inner walls of the two flow guide parts are sealingly connected with the inner walls of the two side beams respectively.

6. The battery pack of claim 5, wherein, The inner walls of the flow guide parts are welded with the inner walls of the opposite side beams, and the bottom walls of the flow guide parts are welded with the top walls of the bottom plate, and liquid cooling welds are formed correspondingly. The outer walls and top walls of the flow guide parts are welded with the front wall, and air-tight welds are formed correspondingly.

7. The battery pack of claim 6, wherein, The flow guide part comprises a shell, the shell is provided with a cavity, and the cavity is open-ended towards the bottom wall and the inner wall of the shell. The inner wall of the shell is connected with the side beam, so that the cavity forms the passage.

8. The battery pack of claim 7, wherein, The bottom wall of the shell is arranged opposite to the inlet or the outlet of the lower box body, so that the passage is communicated with the inlet or the outlet.

9. The battery pack of claim 1, wherein, Both sides of the front wall are provided with mounting openings, and the flow guide parts are arranged in the mounting openings.

10. An energy storage device, characterized by, The utility model relates to a battery box, and particularly relates to a battery box with liquid cooling function. The battery box comprises a plurality of battery boxes according to any one of claims 1-9; and a mounting structure, wherein the plurality of battery boxes are arranged on the mounting structure. ​

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