Plate, box body assembly and battery pack

Abstract

The utility model provides a plate, a box body assembly and a battery pack. The plate comprises a first plate, a second plate and a first sealing ring; the first plate is provided with a first access hole; the second plate is detachably connected with the first plate, and the second plate covers the first access hole; the first sealing ring is arranged between the first plate and the second plate; a first mounting hole is formed in the second plate, the first mounting hole is communicated with the first access hole, and the first mounting hole is configured to be used for mounting a functional part. The first mounting hole for mounting the functional part is formed in the second plate, and the second plate is detachably connected with the first plate, so that when the functional part is maintained, the second plate can be detached from the first plate for maintenance. Therefore, the operation of maintaining the functional part is simple, other parts in the battery pack do not need to be taken out, and when the functional part is maintained after the second plate is detached, the operable space is large, and the maintenance is convenient. Therefore, the maintainability of the battery pack can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a plate, a housing assembly, and a battery pack. Background Technology

[0002] A battery pack is a device that stores electrical energy and provides power to electrical equipment. A battery pack includes a housing assembly and battery cells and electronic components housed within the housing assembly. To improve the ease of use and reliability of the battery pack, various functional components are installed on the housing assembly. These components include, but are not limited to, electrical interfaces, explosion-proof valves, sensors, and fire nozzles.

[0003] Fire nozzles are used in conjunction with fire-fighting materials for fire suppression. It is understood that the battery pack is susceptible to thermal runaway due to the influence of the internal and external environments. To prevent the spread of thermal runaway, the battery pack is equipped with a fire suppression module. When smoke is generated inside the battery pack or the temperature reaches a preset value, the fire suppression module activates to extinguish the fire and control the temperature inside the battery pack. Depending on the fire suppression method, the fire suppression module can be installed inside or outside the enclosure assembly. For example, a jet fire suppression module. The jet fire suppression module's fire tank and booster pump are located outside the enclosure assembly, while the fire nozzles are installed on the enclosure assembly. When the corresponding triggering condition is met, the booster pump sprays the medium stored in the fire tank into the enclosure assembly through the fire nozzles.

[0004] Because functional components such as fire nozzles, sensors, explosion-proof valves, and electrical interfaces are directly fixed to the enclosure assembly, maintenance requires opening the enclosure assembly's cover, removing the battery cells and other components, and then removing these functional components for maintenance. This makes battery pack maintenance quite difficult. Utility Model Content

[0005] Embodiments of this application provide a panel, a housing assembly, and a battery pack, which can improve the maintainability of the battery pack.

[0006] In a first aspect, embodiments of this application provide a plate component for use in a battery pack. The plate component includes a first plate, a second plate, and a first sealing ring. The first plate is provided with a first inspection port. The second plate is detachably connected to the first plate and covers the first inspection port. The first sealing ring is disposed between the first plate and the second plate and extends around the first inspection port. The second plate is provided with a first mounting hole, which communicates with the first inspection port and is configured to install a functional component.

[0007] In one embodiment, the middle portion of the second plate protrudes into a bulge in a direction away from the first plate, and the first mounting hole is disposed on the bulge.

[0008] In one embodiment, the middle portion of the second plate protrudes away from the first plate to form a groove on the side of the second plate facing the first plate. The depth of the groove is D1, and the thickness of the second plate is D2, satisfying: 2D2≤D1≤6D2.

[0009] In one embodiment, along a first direction, the first plate has a height dimension H1 and a bottom end configured to connect with the base plate of the battery pack, and the distance between the center of the first mounting hole and the bottom end is H2, satisfying: 60%H1≤H2≤76%H1.

[0010] In one embodiment, along the second direction, the first plate has a length dimension L1, and the distance between the center of the first mounting hole and one end of the first plate is L2, satisfying: 40%L1≤L2≤60%L1.

[0011] In one embodiment, the plate further includes fasteners, including bolts and nuts, wherein the end of the bolt shank passes through the second plate, the first sealing ring and the first plate in sequence and is threadedly connected to the nut.

[0012] In one embodiment, a first through hole is provided on the first plate, a second through hole is provided on the first sealing ring, a first retaining ring and a second retaining ring are provided on the outer circumferential surface of the nut, the nut passes through the first through hole and the second through hole, the first retaining ring and the second retaining ring are respectively located on both sides of the first plate, and both are in a stop-fitting relationship with the first plate.

[0013] In one embodiment, the plate further includes a third plate and a second sealing ring. The first plate is also provided with a second inspection port. The third plate is detachably connected to the first plate and covers the second inspection port. The second sealing ring is disposed between the first plate and the third plate and extends around the second inspection port. The third plate is provided with at least one second mounting hole, which is configured to install a functional component.

[0014] In one embodiment, the first plate includes a main body and a connecting part. A first inspection port is provided on the main body. One side of the connecting part is connected to the main body, and a weight reduction groove is provided on the other side. The side of the connecting part away from the main body is configured to be connected to the bottom plate of the battery pack. The second plate is detachably connected to the main body.

[0015] In one embodiment, a reinforcing plate is provided between the main body and the connecting part. The reinforcing plate is L-shaped, with one end connected to the main body and the other end connected to the connecting part.

[0016] In one embodiment, at least one of the first plate and the second plate is a stamped part; and / or, the edge of the first access port is configured to fold inward into the battery pack to form a reinforcing rib.

[0017] Secondly, embodiments of this application provide a box assembly, which includes a box cover, a bottom plate, side plates, end plates, and the aforementioned plates; the bottom plate has a first side, a second side, a third side, and a fourth side connected end to end in a ring shape; there are two side plates, which are respectively connected to the first side and the third side; the end plates are connected to the second side and one end of the two side plates; the first plate is connected to the fourth side and the other end of the two side plates; wherein, the box cover is disposed opposite to the bottom plate and is connected to the side plates, end plates, and plates.

[0018] Thirdly, embodiments of this application provide a battery pack, which includes a battery module, a power-off component, and the aforementioned housing assembly; the battery module is disposed within the housing assembly; and the power-off component is mounted in a first mounting hole.

[0019] The beneficial effects of the embodiments of this application are as follows:

[0020] In the embodiments of this application, by setting the first mounting hole for the functional component on the second plate and making the second plate detachably connected to the first plate, the second plate can be removed from the first plate for maintenance of the functional component. This simplifies the maintenance of the functional component, eliminating the need to remove other components inside the battery pack. Furthermore, removing the second plate provides ample operating space and facilitates maintenance. Thus, the maintainability of the battery pack is improved. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the plate provided in an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the structure of the first plate provided in an embodiment of this application;

[0024] Figure 3 This is a side view of the plate provided in an embodiment of this application;

[0025] Figure 4 yes Figure 3 Sectional view of AA;

[0026] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0027] Figure 6 yes Figure 4 Enlarged view of point C in the middle;

[0028] Figure 7 This is a structural schematic diagram of the housing assembly provided in an embodiment of this application;

[0029] Figure 8 This is a schematic diagram of the battery pack structure provided in an embodiment of this application;

[0030] Figure 9 This is a schematic diagram of the fire control structure provided in an embodiment of this application;

[0031] Figure 10 This is a schematic diagram of the battery module provided in an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 01-Panel; 11-First plate; 111-First inspection port; 112-Second inspection port; 113-Bottom end; 114-First through hole; 115-Main body; 116-Connecting part; 1161-Weight reduction groove; 117-Reinforcing plate;

[0034] 12-Second plate; 121-First mounting hole; 122-Protrusion; 123-Groove;

[0035] 13-Third plate; 131-Second mounting hole;

[0036] 14-First sealing ring; 141-Second through hole;

[0037] 15-Fasteners; 151-Bolts; 152-Nuts; 1521-First retaining ring; 1522-Second retaining ring;

[0038] 16 - Second sealing ring;

[0039] 02-Box assembly; 21-Box cover; 22-Bottom plate; 221-First side; 222-Second side; 223-Third side; 224-Fourth side;

[0040] 23-Side plate; 24-End plate;

[0041] 03-Battery pack; 31-Battery module; 311-Battery cell; 312-Connector bar; 3121-Arch bridge structure; 32-Fire nozzle; 33-Fire tank; 34-Booster pump; 35-Sensor; 36-Battery management system. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] Furthermore, it should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this application. In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] The terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a product that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such a product.

[0045] In the description of the embodiments of this application, the words "example" or "for example" are used to indicate exemplification, illustration, or description. Any embodiment or design described as "example" or "for example" in the embodiments of this application is not to be construed as being more preferred or having more advantages than another embodiment or design. The use of the words "example" or "for example" is intended to present relative concepts in a clear manner.

[0046] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of plate 01 provided in an embodiment of this application. Figure 2 This is a schematic diagram of the structure of the first plate 11 provided in an embodiment of this application. In a first aspect, an embodiment of this application provides a plate 01 applied to a battery pack 03. The plate 01 includes a first plate 11, a second plate 12, and a first sealing ring 14. The first plate 11 is provided with a first inspection port 111. The second plate 12 is detachably connected to the first plate 11. The second plate 12 covers the first inspection port 111. The first sealing ring 14 is disposed between the first plate 11 and the second plate 12, and extends around the first inspection port 111. The second plate 12 is provided with a first mounting hole 121. The first mounting hole 121 communicates with the first inspection port 111. The first mounting hole 121 is configured to mount a functional component.

[0047] It is understood that this functional component includes, but is not limited to, fire nozzles, explosion-proof valves, pressure relief valves, sensors, and electrical interfaces.

[0048] It is understood that the plate 01 is part of the housing assembly 02 of the battery pack 03, and the plate 01 and the rest of the housing assembly 02 enclose the mounting cavity for mounting the battery module 31.

[0049] It is understandable that the detachable connection between the first plate 11 and the second plate 12 can be achieved by fasteners 15 such as bolts 151, or by a snap-fit ​​structure.

[0050] It is understandable that the first inspection port 111 is a window for inspecting the inside of the battery pack 03.

[0051] It is understood that the first sealing ring 14 is used to seal the first inspection port 111 in order to improve the sealing performance inside the housing assembly 02.

[0052] In this embodiment, by providing the first mounting hole 121 for mounting the functional component on the second plate 12 and detachably connecting the second plate 12 to the first plate 11, the second plate 12 can be removed from the first plate 11 for maintenance of the functional component. This simplifies the maintenance of the functional component, eliminating the need to remove other components inside the battery pack 03. Furthermore, removing the second plate 12 provides ample operating space and facilitates maintenance. Thus, the maintainability of the battery pack 03 is improved.

[0053] Please see Figure 3 and Figure 4 , Figure 3 This is a side view of plate 01 provided in an embodiment of this application. Figure 4 yes Figure 3 A cross-sectional view of plate AA. In one embodiment, the middle portion of the second plate 12 protrudes in a direction away from the first plate 11 to form a protrusion 122. A first mounting hole 121 is provided on the protrusion 122.

[0054] It is understandable that the second plate 12 is located on the side of the first plate 11 that is away from the inner cavity of the housing assembly 02.

[0055] It is understandable that the convex hull 122 can be formed by stamping a flat plate.

[0056] It is understood that the periphery of the second plate 12 is a planar structure, parallel to the surface of the first plate 11, thereby pressing the first sealing ring 14 onto the first plate 11.

[0057] In this embodiment, by providing a protrusion 122 on the second plate 12, on the one hand, the force can be dispersed by the protrusion 122, thereby increasing the strength of the second plate 12 and thus improving the structural strength of the plate 01; on the other hand, the side of the second plate 12 facing the first plate 11 can be concave, so that the functional component installed on the protrusion 122 and other components in the housing assembly 02 have a larger distance, thereby avoiding interference between the functional component and other components in the battery pack 03. In addition, when the functional component is a fire nozzle 32, the fire nozzle 32 can also have a larger spray stroke, so that the extinguishing material sprayed by the fire nozzle 32 can be more dispersed, so that the material can cover more components in the housing assembly 02, thereby improving the fire protection performance of the battery pack 03.

[0058] Please see Figure 5 , Figure 5 yes Figure 4 Enlarged view at point B. In one embodiment, the middle portion of the second plate 12 protrudes away from the first plate 11 to form a groove 123 on the side of the second plate 12 facing the first plate 11. The depth dimension of the groove 123 is D1, and the thickness dimension of the second plate 12 is D2, satisfying: 2D2≤D1≤6D2.

[0059] It can be understood that the depth dimension D1 of the groove 123 includes, but is not limited to: 2D2, 2.1D2, 2.2D2, 2.3D2, 2.4D2, 2.5D2, 2.6D2, 2.7D2, 2.8D2, 3.0D2, 3.2D2, 3.4D2, 3.6D2, 3.8D2, 4.0D2, 4.2D2, 4.4D2, 4.5D2, 4.6D2, 4.8D2, 5.0D2, 5.1D2, 5.2D2, 5.3D2, 5.4D2, 5.5D2, 5.6D2, 5.7D2, 5.8D2, 5.9D2, and 6D2.

[0060] In this embodiment, by limiting the depth dimension D2 of the groove 123, on the one hand, the groove 123 can have sufficient depth to improve the structural strength of the second plate 12 and provide sufficient space for installing functional components in the battery pack 03; on the other hand, it can prevent the external dimensions of the housing assembly 02 from being too large due to the excessive depth dimension D2 of the groove 123, which would affect the installation of the battery pack 03.

[0061] In addition, when the functional component is a fire nozzle 32, by limiting the depth dimension D2 of the groove 123, the distance between the fire nozzle 32 and the battery module can be larger to meet the spray stroke requirements of the fire nozzle 32.

[0062] Please see Figure 3In one embodiment, along a first direction, the first plate 11 has a height dimension H1 and a bottom end 113 configured to connect with the bottom plate 22 of the battery pack 03, and the distance between the center of the first mounting hole 121 and the bottom end 113 is H2, satisfying: 60%H1≤H2≤76%H1.

[0063] It is understood that the height dimension H2 includes, but is not limited to, 60%H1, 60.6%H1, 61.0%H1, 61.4%H1, 61.8%H1, 62.2%H1, 62.6%H1, 63.0%H1, 63.4%H1, 63.8%H1, 64.2%H1, 64.6%H1, 65.0%H1, 65.4%H1, 65.8%H1, 66.2%H1, 66.6%H1, 67.0%H1, and 67.4%H1. , 67.8% H1, 68.2% H1, 68.6% H1, 69.0% H1, 69.4% H1, 69.8% H1, 70.2% H1, 70.6% H1, 71.0% H1, 71.4% H1, 71 .8% H1, 72.2% H1, 72.6% H1, 73.0% H1, 73.4% H1, 73.8% H1, 74.2% H1, 74.6% H1, 75.0% H1, 75.4% H1, 76% H1.

[0064] It's understandable that the first direction is the direction of gravity.

[0065] It is understandable that when the functional component is the fire nozzle 32, after the fire extinguishing material is sprayed out by the fire nozzle 32, in addition to continuing to flow into the battery pack 03 due to inertia, it will also flow downward under the action of gravity.

[0066] Based on this, in this embodiment, the above-mentioned limitations allow the first mounting hole 121 to be located on the side of the first plate 11 away from the ground, thereby allowing the extinguishing material sprayed by the fire nozzle 32 to be positioned higher. This allows the extinguishing material, under the influence of gravity, to move a greater distance horizontally, thereby increasing the coverage of the extinguishing material and improving the fire-fighting performance of the battery pack 03.

[0067] Please see Figure 3 In one embodiment, along the second direction, the first plate 11 has a length dimension L1, and the distance between the center of the first mounting hole 121 and one end of the first plate 11 is L2, satisfying: 40%L1≤L2≤60%L1.

[0068] It is understandable that the second direction is parallel to the first plate 11 and perpendicular to the first direction.

[0069] It is understood that the distance L2 between the first mounting hole 121 and one end of the first plate 11 includes, but is not limited to, the following: 40% L1, 40.8% L1, 41.3% L1, 42.2% L1, 42.7% L1, 43.5% L1, 44.1% L1, 44.4% L1, 45.6% L1, 45.9% L1, 46.3% L1, 47.1% L1, 47.9% L1, 48.7% L1, 49.2% L1, 49.8% L1, 50.5% L1, 51.1% L1, 51.8% L1, 52.4% L1, 53.3% L1, 54.2% L1, 55.0% L1, 55.7% L1, 56.4% L1, 57.1% L1, 57.8% L1, and 58.3%. L1, 58.9% L1, 60% L1.

[0070] In this embodiment, by limiting the distance L2 between the first mounting hole 121 and one end of the first plate 11, the first mounting hole 121 can be located near the center of the first plate 11. This improves the uniformity of coverage of the battery cells 311 at both ends of the first plate 11 when the functional component is a fire nozzle 32, allowing the extinguishing material sprayed by the fire nozzle 32 to more evenly cover the components within the housing assembly 02. This, in turn, enhances the fire-fighting performance of the battery pack 03.

[0071] Please see Figure 5 In one embodiment, plate 01 further includes a fastener 15. The fastener 15 includes a bolt 151 and a nut 152. The end of the bolt 151 passes sequentially through the second plate 12, the first sealing ring 14, and the first plate 11 before being threadedly connected to the nut 152. This allows for a detachable connection between the first plate 11 and the second plate 12, improving the ease of assembly and disassembly between them, and enhancing the assembly and maintenance efficiency of plate 01. This, in turn, improves the maintainability of the battery pack 03.

[0072] It is understood that there are multiple fasteners 15, and the multiple fasteners 15 are arranged at circumferential intervals along the first inspection port 111.

[0073] Please see Figure 5 In one embodiment, a first through hole 114 is provided on the first plate 11. A second through hole 141 is provided on the first sealing ring 14. A first retaining ring 1521 and a second retaining ring 1522 are provided on the outer peripheral surface of the nut 152. The nut 152 passes through the first through hole 114 and the second through hole 141. The first retaining ring 1521 and the second retaining ring 1522 are respectively located on both sides of the first plate 11 and are both engaged with the first plate 11 for blocking.

[0074] Among them, nut 152 can be rivet nut 152.

[0075] In this embodiment, through the above-mentioned limitations, on the one hand, the nut 152 can be fixed on the first plate 11, which helps to reduce the difficulty of assembling the nut 152 and the bolt 151. On the other hand, the nut 152 can share a portion of the dimensions with the first plate 11 and the first sealing ring 14. Thus, based on controlling the dimensions of the plate body in the axial direction of the nut 152, the nut 152 and the bolt 151 can have a larger mating length, which helps to improve the reliability of the threaded connection between the nut 152 and the bolt 151.

[0076] Please see Figure 1 and Figure 2 In one embodiment, plate 01 further includes a third plate 13 and a second sealing ring 16; a second inspection port 112 is also provided on the first plate 11; the third plate 13 is detachably connected to the first plate 11; the third plate 13 covers the second inspection port 112; the second sealing ring 16 is disposed between the first plate 11 and the third plate 13 and extends around the second inspection port 112; wherein, the third plate 13 is provided with at least one second mounting hole 131, the second mounting hole 131 being configured to install a functional component.

[0077] It is understandable that the way the third plate 13 is fixed to the first plate 11 is the same as the way the second plate 12 is fixed to the first plate 11. The fasteners 15 such as bolts 151 and nuts 152 are used to achieve detachable fixing. For the specific connection method, please refer to the above. It will not be repeated here.

[0078] In this embodiment, by providing two inspection ports: a first inspection port 111 and a second inspection port 112, and corresponding second plates 12 and third plates 13, functional components with different functions can be installed separately to reduce mutual interference during maintenance, thereby improving the maintainability of the battery pack 03 and reducing the difficulty of maintenance.

[0079] Specifically, the fire nozzle 32 for fire fighting and the electrical interface for electrical connection are respectively provided in the first mounting hole 121 and the second mounting hole 131, so as to reduce the mutual interference when maintaining the fire nozzle 32 and the electrical interface respectively, thereby improving the maintainability of the battery pack 03 and reducing the maintenance difficulty.

[0080] Please see Figure 6 , Figure 6 yes Figure 4Enlarged view at point C. In one embodiment, the first plate 11 includes a main body 115 and a connecting portion 116. A first inspection port 111 is provided on the main body 115. One side of the connecting portion 116 is connected to the main body 115, and a weight-reducing groove 1161 is provided on the other side. The side of the connecting portion 116 away from the main body 115 is configured to connect to the bottom plate 22 of the battery pack 03. The second plate 12 is detachably connected to the main body 115. Thus, the connecting portion 116 can be used to structurally reinforce the end of the first plate 11 connected to the bottom plate 22, thereby improving the structural strength of the first plate 11. Furthermore, the connecting portion 116 can increase the connection area between the first plate 11 and the bottom plate 22, thereby improving the reliability of the connection between the first plate 11 and the bottom plate 22.

[0081] For example, the main body 115 and the connecting part 116 are integrally formed.

[0082] Please see Figure 6 In one embodiment, a reinforcing plate 117 is provided between the main body 115 and the connecting portion 116. The reinforcing plate 117 is L-shaped. One end of the reinforcing plate 117 is connected to the main body 115, and the other end is connected to the connecting portion 116. In this way, the connecting portion 116 between the main body 115 and the connecting portion 116 can be structurally reinforced by the reinforcing plate 117 to improve the structural strength of the first plate 11.

[0083] In one embodiment, at least one of the first plate 11 and the second plate 12 is a stamped part. This makes the forming of the first plate 11 and the second plate 12, as stamped parts, simple and easy to manufacture, thereby reducing the manufacturing cost of the battery pack.

[0084] Specifically, the first plate 11 is a stamped part, which is integrally formed by stamping. The second plate 12 is a stamped part, which is integrally formed by stamping.

[0085] In one embodiment, the edge of the first access port 111 is configured to fold inward into the battery pack 03 to form a reinforcing rib. This enhances the structural strength of the first plate 11, thereby improving its impact resistance and ultimately increasing the structural reliability of the battery pack 03.

[0086] Please see Figure 7 , Figure 7This is a schematic diagram of the structure of the box assembly 02 provided in an embodiment of this application. In a second aspect, an embodiment of this application provides a box assembly 02. The box assembly 02 includes a lid 21, a bottom plate 22, side plates 23, end plates 24, and the aforementioned plate 01. The bottom plate 22 has a first side 221, a second side 222, a third side 223, and a fourth side 224 connected in a ring shape from end to end. There are two side plates 23, which are respectively connected to the first side 221 and the third side 223. The end plates 24 are connected to one end of the second side 222 and the two side plates 23. The first plate 11 is connected to the other end of the fourth side 224 and the two side plates 23. The lid 21 is disposed opposite to the bottom plate 22 and is connected to the side plates 23, the end plates 24, and the plate 01.

[0087] It is understandable that the cover plate is parallel to the bottom plate 22, and the side plate 23, end plate 24 and plate body are perpendicular to the bottom plate 22.

[0088] For example, the base plate 22 is a liquid cooling plate.

[0089] Specifically, the side plate 23, end plate 24 and plate body are all welded to the base plate 22, and the side plate 23, end plate 24 and plate body are connected to the cover plate by screws.

[0090] It is understood that the housing assembly 02 includes the aforementioned plate, and therefore the housing assembly 02 has all the beneficial effects of the aforementioned plate, which will not be repeated here.

[0091] Please see Figure 8 and Figure 9 , Figure 8 This is a schematic diagram of the structure of the battery pack 03 provided in an embodiment of this application. Figure 9 This is a schematic diagram of a fire control structure provided by an embodiment of this application. In a third aspect, an embodiment of this application provides a battery pack 03. The battery pack 03 includes a battery module 31, functional components, a fire tank 33, a booster pump 34, and the aforementioned housing assembly 02. The battery module 31 is disposed within the housing assembly 02. The functional components are installed in the first mounting hole 121. The two ends of the booster pump 34 are connected to the fire nozzle 32 and the fire tank 33 respectively via pipes.

[0092] It is understood that the battery pack 03 includes the aforementioned housing assembly 02, and therefore the battery pack 03 has all the beneficial effects of the aforementioned housing assembly 02, which will not be repeated here.

[0093] It is understood that when the functional component is the fire nozzle 32, the battery pack 03 also includes a fire tank 33 and a booster pump 34. The two ends of the booster pump 34 are connected to the fire nozzle 32 and the fire tank 33 respectively through pipes.

[0094] It is understandable that fire extinguishing tank 33 stores fire extinguishing substances, such as perfluorohexanone.

[0095] It is understood that the battery pack 03 also includes a sensor 35 and a battery management system 36. The sensor 35 and the booster pump 34 are communicatively connected to the battery management system 36. The probe of the sensor 35 is disposed inside the housing assembly 02. The sensor 35 is used to monitor environmental information inside the housing assembly 02, such as smoke information, temperature information, etc. Exemplarily, the sensor 35 can be at least one of a temperature sensor 35, a smoke sensor 35, and a carbon monoxide sensor 35. In this embodiment, the sensor 35 is a three-in-one sensor 35, which can simultaneously detect temperature, smoke, and carbon monoxide concentration. When the sensor 35 detects that any of these three parameters exceeds a preset value (e.g., the temperature exceeds a preset temperature value, or the smoke concentration exceeds a preset smoke concentration value, or the carbon monoxide concentration exceeds a preset carbon monoxide concentration value), the sensor 35 sends a signal to the battery management system 36. After receiving the signal from the sensor 35, the battery management system 36 starts the booster pump 34. The booster pump 34 operates to pump the fire-fighting material (e.g., perfluorohexanone) in the fire tank 33 to the fire nozzle 32. Fire nozzle 32 is used to spray fire extinguishing material into the housing assembly 02 to achieve the effect of extinguishing fire.

[0096] A fire extinguishing kit can also be installed on the inner wall of the housing assembly 02. For example, a fire extinguishing kit containing aerosol can be installed on the second plate 12. A thermal trigger is used to release the aerosol from the fire extinguishing kit. When the temperature inside the battery pack 03 reaches the trigger temperature of the thermal trigger, the thermal trigger is activated, activating the fire extinguishing kit to spray fire extinguishing material, thereby extinguishing the fire inside the battery pack 03.

[0097] Additionally, multiple battery modules 31 can be installed within the housing assembly 02; for example, four battery modules 31 may be installed within the housing assembly 02. Each battery module 31 includes 26 sequentially stacked battery cells 311, such as... Figure 10 As shown, Figure 10 This is a schematic diagram of the structure of the battery module 31 provided in the embodiments of this application. The battery cells 311 within each battery module 31 are connected in series, and adjacent battery modules 31 are connected in series via copper busbars. Thus, by setting a larger number of battery cells 311 in each battery module 31, compared to dividing 26 battery cells 311 into multiple battery modules 31, the number of module structural components and electrical components can be reduced, thereby improving the space utilization of the battery pack 03 and allowing for more flexible arrangement of electrical components in the battery module 31.

[0098] Among them, an arch bridge structure 3121 is provided in the middle of the connecting row 312 that connects two adjacent battery cells 311, such as Figure 10As shown. In this way, the arch bridge structure 3121 of the connecting strip 312 can absorb the expansion and deformation of the high-energy battery module 31 under working conditions, and can reduce the flatness requirements of the connecting strip 312, simplify the processing technology of the connecting strip 312, and reduce the manufacturing cost of the connecting strip 312.

[0099] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A plate component used in a battery pack, characterized in that, include: The first panel has a first inspection port; The second plate is detachably connected to the first plate and covers the first inspection port. The first sealing ring is disposed between the first plate and the second plate and extends around the first inspection port; The second plate is provided with a first mounting hole, which is connected to the first inspection port and is configured to install a functional component.

2. The plate component according to claim 1, characterized in that, The middle part of the second plate protrudes into a convex bulge in a direction away from the first plate, and the first mounting hole is disposed on the convex bulge.

3. The plate component according to claim 2, characterized in that, The second plate protrudes from the middle away from the first plate to form a groove on the side of the second plate facing the first plate. The depth of the groove is D1, and the thickness of the second plate is D2, satisfying: 2D2≤D1≤6D2.

4. The plate component according to claim 1, characterized in that, Along a first direction, the first plate has a height dimension H1 and a bottom end configured to connect with the bottom plate of the battery pack, and the distance between the center of the first mounting hole and the bottom end is H2, satisfying: 60%H1≤H2≤76%H1.

5. The plate component according to claim 1, characterized in that, Along the second direction, the first plate has a length dimension L1, and the distance between the center of the first mounting hole and one end of the first plate is L2, satisfying: 40%L1≤L2≤60%L1.

6. The plate component according to any one of claims 1-5, characterized in that, The plate also includes fasteners, which include bolts and nuts. The end of the bolt shank passes through the second plate, the first sealing ring and the first plate in sequence and is then threadedly connected to the nut.

7. The plate component according to claim 6, characterized in that, The first plate is provided with a first through hole, the first sealing ring is provided with a second through hole, the outer circumferential surface of the nut is provided with a first retaining ring and a second retaining ring, the nut passes through the first through hole and the second through hole, the first retaining ring and the second retaining ring are respectively located on both sides of the first plate, and both are in a stop-fitting relationship with the first plate.

8. The plate component according to any one of claims 1-5, characterized in that, The plate also includes a third plate and a second sealing ring. The first plate is also provided with a second inspection port. The third plate is detachably connected to the first plate and covers the second inspection port. The second sealing ring is disposed between the first plate and the third plate and extends around the second inspection port. The third plate is provided with at least one second mounting hole, which is configured to install a functional component.

9. The plate component according to any one of claims 1-5, characterized in that, The first plate includes a main body and a connecting part. The first inspection port is disposed on the main body. One side of the connecting part is connected to the main body, and the other side is provided with a weight reduction groove. The side of the connecting part away from the main body is configured to be connected to the bottom plate of the battery pack. The second plate is detachably connected to the main body.

10. The plate component according to claim 9, characterized in that, A reinforcing plate is provided between the main body and the connecting part. The reinforcing plate is L-shaped, with one end connected to the main body and the other end connected to the connecting part.

11. The plate component according to any one of claims 1-5, characterized in that, At least one of the first plate and the second plate is a stamped part; and / or, The edge of the first access port is configured to fold inward into the battery pack to form a reinforcing rib.

12. A housing assembly, characterized in that, include: Box lid; The base plate has a first side, a second side, a third side, and a fourth side that are connected end to end in a ring shape; Two side plates are respectively connected to the first side and the third side; An end plate, connected to the second side and one end of the two side plates; and The plate as described in any one of claims 1-11, wherein the first plate is connected to the fourth side and the other end of the two side plates; The box cover is positioned opposite to the bottom plate and is connected to the side plate, end plate, and plate components.

13. A battery pack, characterized in that, include: The housing assembly as described in claim 12; The battery module is disposed within the housing assembly; as well as, The functional component is installed in the first mounting hole.

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