A spraying structure for a battery PACK package

Abstract

The utility model relates to battery package technical field, concretely for a kind of spraying structure for battery PACK package, including package body, installation bottom shell, top plate, battery module group and bottom mounting piece, installation bottom shell includes first rib plate and second rib plate, bottom plate is equipped between first rib plate and second rib plate, first flow-through cavity is set up on first rib plate, first flow-through cavity is connected with second flow-through cavity by the communicating port of second rib plate, form gas heat exchange passage, external air can circulate in passage, cooperate rib plate bevel fit design, significantly improve the efficiency of convection heat dissipation, quickly take away the heat generated by battery module.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and specifically to a spray structure for a battery pack. Background Technology

[0002] Battery packs, as high-capacity power supply carriers, are widely used in various devices. Under the premise of ensuring safety, high energy density and long service life are the development directions for battery packs.

[0003] Since battery cell capacity is limited, making full use of the battery pack space is an important way to improve energy density. Batteries generate a significant amount of heat during charging and discharging; excessively high temperatures can affect battery life and even lead to thermal runaway. Therefore, timely dissipation of the heat generated by the battery pack and maintaining its operating temperature are crucial for improving battery life and safety.

[0004] Chinese patent document CN118919923A discloses a spray-type liquid-cooled energy storage PACK device, including a housing and multiple battery modules disposed within the housing. The side wall of the housing is provided with a liquid inlet pipe and a liquid outlet pipe. A spray pipe is detachably fixed to the upper surface of each battery module. Multiple spray holes are opened at the bottom of each spray pipe, and one end of each spray pipe has a liquid inlet. The multiple liquid inlets are connected to the liquid inlet pipe, and one end of the liquid outlet pipe communicates with a cavity within the housing. By independently configuring spray pipes on the upper surface of each battery module, the cooling efficiency of each battery module can be precisely controlled, effectively avoiding temperature unevenness caused by differences in working environment, battery status, and heat load between battery modules.

[0005] During the use of the above-mentioned device, since the spray pipe is located at the top of the battery module, and the contact time between the coolant and the battery pack greatly affects the heat exchange efficiency, when the top-mounted spray pipe sprays, the coolant will flow quickly to the bottom of the battery module under the action of gravity, which can easily cause insufficient cooling at the top and excessive cooling at the bottom. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model provides a spray structure for a battery pack, which solves the problem that when the spray pipe installed on the top of the battery module sprays, the coolant will flow quickly to the bottom of the battery module under the action of gravity, which can easily cause insufficient cooling at the top and excessive cooling at the bottom.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A spray structure for a battery pack includes a pack body, the pack body including a mounting bottom shell and a top plate, the mounting bottom shell is concave, and a battery module group is installed inside the mounting bottom shell, the battery module group being composed of multiple battery modules, and a bottom mounting component is installed at the bottom of the pack body.

[0009] The mounting base includes two first ribs and two second ribs, which are arranged alternately in sequence. A base plate is fixed between the two first ribs and the second ribs. Multiple through-flow cavities are opened on both first ribs and multiple through-flow cavities are opened on both second ribs to increase the contact area between the inside of the package and the external environment.

[0010] The spray assembly, located inside the package, is used to accelerate the heat dissipation of the battery module pack.

[0011] Preferably, the first flow cavities are arranged vertically on the first rib and are square in shape, and the first flow cavities are arranged vertically on the second rib and are square in shape, which also serves to increase the contact area between the inside of the package and the external environment.

[0012] Preferably, one of the second ribs has a communication port, and the second flow cavity is connected to the first flow cavity through the communication port, so that the second flow cavity and the first flow cavity are connected, thereby allowing the air outside the package to circulate inside the first flow cavity and the second flow cavity.

[0013] Preferably, the spray assembly includes a water inlet pipe head installed on the mounting base, through which coolant can flow into the interior of the package to dissipate heat and cool the battery module group. The surface of the water inlet pipe head is provided with a first threaded section, and a first threaded groove adapted to the first threaded section is opened on one side of the mounting base, and the first threaded section of the water inlet pipe head is threaded into the interior of the first threaded groove, which facilitates the disassembly and assembly of the water inlet pipe head.

[0014] Preferably, the outer wall of the mounting base is provided with a drain pipe head, the surface of the drain pipe head is provided with a second threaded section, and the mounting base is provided with a second threaded groove on the side facing the drain pipe head that is adapted to the second threaded section. The drain pipe head is threadedly connected to the inside of the second threaded groove through the second threaded section, which facilitates the disassembly and assembly of the drain pipe head and thus achieves convenient replacement of the drain pipe head.

[0015] Preferably, the inner wall of the mounting base is equipped with a connecting pipe and two partitions, and the connecting pipe is connected to the partitions. Water from inside the water inlet head can flow into the interior of the partitions through the connecting pipe and spray onto the surface of the battery module to dissipate heat from the battery module.

[0016] Preferably, the connecting pipe includes a first connector, a first connecting pipe, and a second connecting pipe. One end surface of the first connector is provided with a third threaded segment. The inner wall of the mounting base is provided with a third threaded groove that is adapted to the third threaded segment. The third threaded groove is connected to the first threaded groove, and the third threaded segment is threadedly connected inside the third threaded groove. A connecting nut is sleeved on the surface of the first connecting pipe. The other end surface of the first connector is provided with a fourth threaded segment, and the connecting nut is threadedly connected to the fourth threaded segment. A second threaded head is sleeved on the end surface of the first connecting pipe away from the connecting nut. The surface of the second threaded head has a fifth threaded segment.

[0017] Preferably, a fifth threaded groove adapted to the fifth threaded segment is provided on the partition plate near the water inlet pipe head, and the second threaded head is threadedly connected to the inside of the fifth threaded groove through the fifth threaded segment. A second connecting pipe is provided between the two partition plates, and a third connector is sleeved on both ends of the second connecting pipe. A sixth threaded segment is provided on the third connector. A sixth threaded groove adapted to the sixth threaded segment is provided on both partition plates, and the third connector is threadedly connected to the corresponding sixth threaded groove through the sixth threaded segment. Multiple spray nozzles are provided on both sides of the partition plate at equal intervals, and each spray nozzle corresponds to a battery module.

[0018] Preferably, the top plate is mounted on the mounting base shell by bolts and nuts.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. The package consists of a mounting base and a top plate, which are connected by bolts and nuts for easy disassembly and maintenance. At the same time, the top plate seals the inner cavity, providing physical protection for the battery module group and preventing the intrusion of foreign objects.

[0021] 2. By alternating the arrangement of the first rib and the second rib, a multi-channel heat dissipation structure is formed with the first flow cavity on the first rib and the second flow cavity on the second rib, which increases the contact area between the inside of the package and the outside world and accelerates heat conduction.

[0022] 3. The first flow cavity and the second flow cavity are connected through the communication port of the second rib to form a gas heat exchange channel. Outside air can circulate in the channel. With the rib inclined surface fitting design, the convection heat dissipation efficiency is significantly improved, and the heat generated by the battery module is quickly removed.

[0023] 4. The components are connected by threads through the first connector, the first connecting pipe and the second connecting pipe, which facilitates disassembly and maintenance. The partition is connected to the connecting pipe and has an internal chamber. Coolant is sprayed onto the surface of the battery module through the spray nozzle, which can spray the battery module in a targeted manner, quickly remove heat and improve heat dissipation efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a schematic diagram of the structure of the package body of this utility model.

[0026] Figure 3 This is a schematic diagram of the mounting base of this utility model.

[0027] Figure 4 This is a schematic diagram of the battery module assembly of this utility model.

[0028] Figure 5 For the present utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0029] Figure 6 This is a schematic diagram of the partition of this utility model.

[0030] Figure 7 For the present utility model Figure 6 Enlarged structural diagram at point B.

[0031] Figure 8 This is a schematic diagram of the structure of the spray assembly of this utility model.

[0032] In the picture:

[0033] 10. Package body; 101. Mounting bottom shell; 1101. First rib; 1102. Second rib; 1103. Bottom plate; 1104. First flow cavity; 1105. Second flow cavity; 1106. Connecting port; 102. Top plate; 11. Battery module assembly; 12. Bottom mounting component;

[0034] 20. Spray assembly; 21. Water inlet pipe head; 210. First threaded section; 211. First threaded groove; 22. Drain pipe head; 221. Second threaded section; 222. Second threaded groove; 23. Connecting pipe; 231. First connector; 2310. Third threaded section; 2311. Third threaded groove; 232. First connecting pipe; 2320. Connecting nut; 2321. Fourth threaded section; 2323. Second threaded head; 2324. Fifth threaded section; 2325. Fifth threaded groove; 233. Second connecting pipe; 2330. Third connector; 2331. Sixth threaded section; 2332. Sixth threaded groove; 24. Partition plate; 25. Spray nozzle. Detailed Implementation

[0035] The following will refer to the attached reference. Figures 1 to 8 The various embodiments of this utility model will be described in detail below. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0036] Example 1

[0037] As attached Figures 1-8 As shown, a spray structure for a battery pack includes a pack body 10, inside which a battery module group 11 is installed. The battery module group 11 consists of multiple battery modules. The pack body 10 is composed of a mounting bottom shell 101 and a top plate 102. The mounting bottom shell 101 and the top plate 102 are arranged vertically, with the top plate 102 located above the mounting bottom shell 101. The mounting bottom shell 101 is concave and has an inner cavity facing upwards. The inner cavity is used to support the battery module group 11. The width of the top plate 102 is adapted to the width of the mounting bottom shell 101, so the top plate 102 can be installed on top of the mounting bottom shell 101, thereby sealing the inner cavity of the mounting bottom shell 101 and protecting the battery module group 11 inside the inner cavity.

[0038] The mounting base 101 includes two first ribs 1101 and two second ribs 1102, and the two first ribs 1101 and the second ribs 1102 are arranged alternately in sequence. A base plate 1103 is fixed between the first ribs 1101 and the second ribs 1102. The base plate 1103 is used to support the battery module group 11.

[0039] Multiple through-flow cavities 1104 are provided on both first ribs 1101, and the multiple first flow cavities 1104 are arranged vertically on the first ribs 1101. The first flow cavities 1104 are square, which are used to increase the contact area between the inside of the package 10 and the external environment, so that the heat generated by the battery module group 11 can be more effectively transferred to the outside through the wall of the inner cavity, thereby helping to reduce the temperature of the battery module group 11.

[0040] Multiple through-flow cavities 1105 are provided on the second rib 1102, and multiple first flow cavities 1104 are arranged vertically on the second rib 1102. The second flow cavities 1105 are square, which also increases the contact area between the inside of the package 10 and the external environment, so that the heat generated by the battery module group 11 can be more effectively transferred to the outside through the wall of the inner cavity, thereby helping to reduce the temperature of the battery module group 11. One of the second ribs 1102 has a connecting port 1106, and the second flow cavity 1105 is connected to the first flow cavity 1104 through the connecting port 1106, so that the second flow cavity 1105 and the first flow cavity 1104 are connected, so that the air outside the package 10 can circulate inside the first flow cavity 1104 and the second flow cavity 1105. The first rib 1101 works with the second rib 1102 to accelerate the removal of heat from the inside of the inner cavity. The bottom mounting part 12 is installed at the bottom of the bottom plate 1103 to facilitate the installation of the package 10.

[0041] When installing the battery module assembly 11, first remove the top plate 102 from the mounting base 101, then install the battery module assembly 11 inside the mounting base 101. After installation, install the top plate 102 onto the mounting base 101 with bolts and nuts, and then install the package 10 at the point of use using the bottom mounting piece 12.

[0042] Since one side of each of the two first ribs 1101 is inclined, and both sides of the second rib 1102 located on the inclined surface of the first rib 1101 are also inclined, and the inclined surface of the second rib 1102 is in contact with the inclined surface of the first rib 1101, and the second flow cavity 1105 of the first rib 1101 is connected to the first flow cavity 1105, since the first flow cavity 1104 of the first rib 1101 is exposed to the outside, and outside air can flow into the interior of the first flow cavity 1104, and the gas inside the first flow cavity 1104 can also flow into the interior of the second flow cavity 1105, a gas heat exchange channel can be formed, which can accelerate the heat generated by the battery module group 11, thereby significantly improving the heat dissipation efficiency.

[0043] The inside of the package 10 is equipped with a spray assembly 20 to accelerate the heat dissipation of the battery module group 11, thereby stabilizing the performance of the battery module group 11.

[0044] The spray assembly 20 includes a water inlet pipe head 21 mounted on the mounting base 101. Coolant can flow into the interior of the housing 10 through the water inlet pipe head 21 to dissipate heat and cool the battery module assembly 11. The surface of the water inlet pipe head 21 is provided with a first threaded section 210. A first threaded groove 211 adapted to the first threaded section 210 is opened on one side of the mounting base 101. The first threaded section 210 of the water inlet pipe head 21 is threaded into the interior of the first threaded groove 211, which facilitates the disassembly and assembly of the water inlet pipe head 21 and achieves convenient replacement of the water inlet pipe head 21.

[0045] The outer wall of the mounting base 101 is provided with a drain pipe head 22 for draining the coolant used to cool the battery module group 11 inside the housing 10. The coolant is circulated inside the housing 10 by the water inlet pipe head 21 in conjunction with the drain pipe head 22, thereby maintaining the heat dissipation performance of the battery module group 11. The surface of the drain pipe head 22 is provided with a second threaded section 221. The mounting base 101 has a second threaded groove 222 on the side facing the drain pipe head 22 that matches the second threaded section 221. The drain pipe head 22 is threaded into the second threaded groove 222 through the second threaded section 221, which facilitates the disassembly and assembly of the drain pipe head 22 and makes it easy to replace the drain pipe head 22.

[0046] The inner wall of the mounting base 101 is equipped with a connecting pipe 23 and two partitions 24, and the connecting pipe 23 is connected to the partitions 24. Water inside the water inlet 21 can flow into the interior of the partitions 24 through the connecting pipe 23 and spray onto the surface of the battery module group 11, thereby dissipating heat from the battery module group 11.

[0047] The connecting pipe 23 includes a first connector 231, a first connecting pipe 232, and a second connecting pipe 233. One end surface of the first connector 231 is provided with a third threaded section 2310. The inner wall of the mounting base 101 is provided with a third threaded groove 2311 that is adapted to the third threaded section 2310. The third threaded groove 2311 is connected to the first threaded groove 211, and the third threaded section 2310 is threadedly connected to the inside of the third threaded groove 2311. A connecting nut 2320 is sleeved on the surface of the first connecting pipe 232. The other end surface of the first connector 231 is provided with a fourth threaded section 2321, and the connecting nut 2320 is threadedly connected to the fourth threaded section 2321. A second threaded head 2323 is sleeved on the end surface of the first connecting pipe 232 away from the connecting nut 2320. The surface of the second threaded head 2323 has a fifth threaded section 2324.

[0048] A fifth threaded groove 2325 adapted to the fifth threaded section 2324 is provided on the partition 24 near the water inlet pipe head 21, and the second threaded head 2323 is threadedly connected to the inside of the fifth threaded groove 2325 through the fifth threaded section 2324. A second connecting pipe 233 is provided between the two partitions 24. A third connector 2330 is sleeved on both ends of the second connecting pipe 233. A sixth threaded section 2331 is provided on the third connector 2330. A sixth threaded groove 2332 adapted to the sixth threaded section 2331 is provided on both partitions 24, and the third connector 2330 is threadedly connected to the inside of the corresponding sixth threaded groove 2332 through the sixth threaded section 2331. Multiple spray nozzles 25 are provided on both sides of the partition 24 at equal intervals, and each spray nozzle 25 corresponds to a battery module.

[0049] In use, since each spray nozzle 25 corresponds to the side wall area of ​​the battery module, when the coolant flows from the inlet pipe 21 to the drain pipe 22, the coolant inside the partition 24 has a cavity. After the coolant flows into the cavity, the coolant inside the cavity can be sprayed out onto the surface of the battery module through the spray nozzle 25. Since the side area of ​​the battery module is large, a lot of heat will accumulate during operation. The coolant sprayed from the spray nozzle 25 directly facing the side of the battery module can directly and extensively cover the side of the battery module. This targeted spraying method can quickly remove the heat accumulated on the side of the battery module, effectively reduce the temperature of the area, and improve heat dissipation efficiency. As the coolant accumulates inside the cavity, it will form an immersion cooling effect on the battery module, allowing the battery module to be immersed in the coolant. When the coolant circulates, it can be discharged through the drain pipe 22.

[0050] Example 2

[0051] The spray nozzle 25 is positioned at the edge of the battery module, that is, a part of the spray nozzle 25 corresponds to the surface of the battery module, and the other part of the spray nozzle 25 corresponds to the gap between two adjacent battery modules.

[0052] When coolant is sprayed from the spray nozzle 25, part of the coolant covers the surface of the battery module for cooling, while the other part, unobstructed by the battery modules, can pass directly through the area between two battery modules to the other side of the battery module. This ensures that all four sides of the battery module can directly contact the coolant sprayed from the spray nozzle 25, achieving all-around cooling and greatly improving the cooling efficiency of the battery module. By allowing the coolant to pass directly through the gaps between the battery modules, heat from the sides and back of the battery module can be effectively carried away, reducing heat accumulation in these areas, lowering the overall temperature of the battery module, and extending its service life. This layout allows the coolant to be distributed more evenly around the battery module, avoiding localized overheating or undercooling, improving the uniformity of the battery module temperature distribution, and contributing to the performance and stability of the battery module group 11.

[0053] Example 3

[0054] Because the top of the battery module has electrodes that generate a significant amount of heat, the spray nozzle 25 is positioned at the corner where the top and side of the battery module meet. Specifically, the spray nozzle 25 corresponds to the corner where the top and side of the battery module meet. Part of the coolant sprayed from the nozzle 25 covers the top of the battery module, cooling the electrodes and the top surface of the battery module. The other part of the coolant is sprayed onto the side of the battery module, cooling its sides as well. By positioning the spray nozzle 25 at the corner, the coolant sprayed from the nozzle 25 can simultaneously cover the top and side of the battery module. Part of the coolant cools the top electrodes, while the other part flows to the side, creating a synergistic heat dissipation effect between the top and side. This solves the problem of simultaneous heat generation on the top and side of the battery module, resulting in a more balanced overall temperature distribution, optimized heat dissipation path, and improved heat dissipation efficiency.

[0055] Example 4

[0056] Each spray nozzle 25 is surrounded by small water flow holes. The water sprayed from the spray nozzle 25 is further dispersed as it passes through the surrounding small water flow holes, causing the water to be sprayed out in finer particles. The coolant sprayed from the small holes can expand the contact area between the coolant and the battery module, allowing the coolant to directly contact the battery module casing and better absorb the heat generated by the battery. In addition, the small holes can allow the water to spray in different directions, which helps to fill the blank areas between the spray holes and make the spray coverage more uniform. Furthermore, the fine particles of coolant have a larger surface area and evaporate faster. During the evaporation process of the coolant, a large amount of heat is removed through phase change heat absorption, which further improves the cooling effect, especially suitable for heat dissipation of battery packs in high-temperature environments.

[0057] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A spraying structure for a battery PACK package, comprising a package body (10), characterized in that, The package (10) includes a mounting bottom shell (101) and a top plate (102). The mounting bottom shell (101) is concave, and a battery module group (11) is installed inside the mounting bottom shell (101). The battery module group (11) is composed of multiple battery modules. A bottom mounting component (12) is installed at the bottom of the package (10). The mounting base (101) includes two first ribs (1101) and two second ribs (1102), and the two first ribs (1101) and the two second ribs (1102) are arranged alternately in sequence. A base plate (1103) is fixed between the two first ribs (1101) and the two second ribs (1102). Multiple through-hole first flow cavities (1104) are opened on the two first ribs (1101), and multiple through-hole second flow cavities (1105) are opened on the two second ribs (1102) to increase the contact area between the inside of the package (10) and the external environment. The spray assembly (20) is located inside the package (10) and is used to accelerate the heat dissipation of the battery module group (11).

2. The spray structure for a battery PACK package according to claim 1, wherein Multiple first flow cavities (1104) are arranged vertically on the first rib (1101), and the first flow cavities (1104) are square. Multiple first flow cavities (1104) are arranged vertically on the second rib (1102), and the second flow cavity (1105) is square.

3. The spray structure for a battery PACK package according to claim 1, wherein One of the second ribs (1102) has a connecting port (1106), and the second flow cavity (1105) is connected to the first flow cavity (1104) through the connecting port (1106), so that the second flow cavity (1105) and the first flow cavity (1104) are both connected, so that the air outside the package (10) can circulate inside the first flow cavity (1104) and the second flow cavity (1105).

4. The spray structure for a battery PACK package according to claim 3, characterized by, The spray assembly (20) includes a water inlet pipe head (21) installed on the mounting base (101). Coolant can flow into the interior of the package (10) through the water inlet pipe head (21) to dissipate heat and cool the battery module group (11). The surface of the water inlet pipe head (21) is provided with a first threaded section (210). A first threaded groove (211) adapted to the first threaded section (210) is opened on one side of the mounting base (101), and the first threaded section (210) of the water inlet pipe head (21) is threaded into the interior of the first threaded groove (211), which facilitates the disassembly and assembly of the water inlet pipe head (21).

5. The spray structure for a battery PACK package according to claim 4, wherein The outer wall of the mounting base (101) is provided with a drain pipe head (22), and the surface of the drain pipe head (22) is provided with a second threaded section (221). The mounting base (101) has a second threaded groove (222) that is adapted to the second threaded section (221) on the side facing the drain pipe head (22). The drain pipe head (22) is threadedly connected to the inside of the second threaded groove (222) through the second threaded section (221), which facilitates the disassembly and assembly of the drain pipe head (22) and thus achieves convenient replacement of the drain pipe head (22).

6. The spray structure for a battery PACK package according to claim 5, wherein The inner wall of the mounting base (101) is equipped with a connecting pipe (23) and two partitions (24), and the connecting pipe (23) is connected to the partitions (24). Water from the water inlet head (21) can flow into the interior of the partitions (24) through the connecting pipe (23) and spray onto the surface of the battery module group (11) to dissipate heat.

7. A spray structure for a battery pack according to claim 6, characterized in that, The connecting pipe (23) includes a first connector (231), a first connecting pipe (232), and a second connecting pipe (233). One end surface of the first connector (231) is provided with a third threaded section (2310). The inner wall of the mounting base (101) is provided with a third threaded groove (2311) that is adapted to the third threaded section (2310). The third threaded groove (2311) is connected to the first threaded groove (211), and the third threaded section (2310) is threadedly connected to the third threaded section. Inside the groove (2311), a connecting nut (2320) is fitted onto the surface of the first connecting pipe (232), and a fourth threaded section (2321) is provided on the other end surface of the first connector (231), and the connecting nut (2320) is threaded onto the fourth threaded section (2321). A second threaded head (2323) is fitted onto the surface of the first connecting pipe (232) away from the connecting nut (2320), and the surface of the second threaded head (2323) has a fifth threaded section (2324). 8.The spray structure for a battery PACK package according to claim 7, wherein A fifth threaded groove (2325) adapted to the fifth threaded section (2324) is provided on the partition (24) near the water inlet pipe head (21), and the second threaded head (2323) is threadedly connected to the inside of the fifth threaded groove (2325) through the fifth threaded section (2324). A second connecting pipe (233) is provided between the two partitions (24), and a third connector (2330) is sleeved on both ends of the second connecting pipe (233). The third connector (2330) is provided with a sixth threaded section (2331), and the two partitions (24) are provided with a sixth threaded groove (2332) that is compatible with the sixth threaded section (2331). The third connector (2330) is threadedly connected to the corresponding sixth threaded groove (2332) through the sixth threaded section (2331). Multiple spray nozzles (25) are provided on both sides of the partition (24), and each spray nozzle (25) corresponds to a battery module.

9. The spray structure for a battery PACK package according to claim 8, wherein The top plate (102) is mounted on the mounting base (101) by bolts and nuts.

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