A battery pack and an electric device

Abstract

The application provides a battery pack and a power utilization device, comprising: a tray, a sealing structure, a cover plate and a whole vehicle sealing element arranged in sequence along a first direction; the tray comprises a side beam, and the side beam is connected with the cover plate through a fastener; the sealing structure comprises a plurality of sealing elements, and the plurality of sealing elements at least enclose a sealing area; the fastener located outside the sealing area is a first fastener, and the fastener located inside the sealing area is a second fastener; the whole vehicle sealing element is arranged along the circumference of the cover plate, and at least part of the orthographic projection of the whole vehicle sealing element in the first direction is located between the first fastener and the second fastener. The sealing structure of the application can block the flow of moisture from the first fastener located outside the sealing area to the second fastener located inside the sealing area, so that the moisture can be prevented from entering the passenger compartment, and the reliable sealing of the whole vehicle is realized.

Description

Technical Field

[0001] This application belongs to the field of battery pack technology, specifically relating to a battery pack and an electrical device. Background Technology

[0002] The battery pack cover is equipped with sealing foam extending circumferentially above it. By abutting against the vehicle body, the entire vehicle can be sealed, effectively preventing moisture from entering the passenger compartment.

[0003] In related technologies, the battery pack also includes batteries and a tray for carrying the batteries. The side beams of the tray are bolted to the cover to keep the batteries in a closed space. However, when some bolts are located on the outside of the sealing foam and some are located on the inside of the sealing foam, water can seep in from the bolts on the outside of the sealing foam. The water will then flow from the gap between the tray and the cover to the bolts on the inside of the sealing foam and into the passenger compartment, causing the entire vehicle's seal to fail. Utility Model Content

[0004] This application aims to provide a battery pack and electrical equipment to solve the problem of external moisture entering the passenger compartment, causing the vehicle's seals to fail.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, this application discloses a battery pack, comprising: a tray, a sealing structure, a cover plate, and a vehicle seal arranged sequentially along a first direction;

[0007] The pallet includes a side beam, which is connected to the cover plate by fasteners;

[0008] The sealing structure includes a plurality of sealing elements, which at least enclose a sealing area. The fastener located outside the sealing area is a first fastener, and the fastener located within the sealing area is a second fastener.

[0009] The vehicle seal extends circumferentially along the cover plate, and at least a portion of the orthographic projection of the vehicle seal in the first direction is located between the first fastener and the second fastener.

[0010] Optionally, the sealing structure further includes: a plurality of sealing grooves, the sealing grooves being disposed on the side of the side beam near the cover plate, and the plurality of sealing grooves being interconnected;

[0011] One of the sealing grooves is fitted with at least one of the sealing elements to at least enclose the sealing area.

[0012] Optionally, the extension direction of the side beam is a second direction, which intersects with the first direction, and the sealing groove includes: a first sealing groove, a second sealing groove, and a third sealing groove;

[0013] The first sealing groove and the second sealing groove are spaced apart and extend along the second direction;

[0014] The third sealing groove is disposed between the first fastener and the second fastener and is connected to the first sealing groove and the second sealing groove respectively.

[0015] Optionally, both the first sealing groove and the second sealing groove extend along the second direction to both ends of the side beam.

[0016] Optionally, the first sealing groove is located near the center of the tray, and the second sealing groove is located away from the center of the tray;

[0017] The first sealing groove is disposed on the outside of the vehicle seal and extends at least partially between the first fastener and the second fastener;

[0018] The second sealing groove is disposed on the inner side of the vehicle seal and extends at least partially between the first fastener and the second fastener.

[0019] Optionally, the vehicle seal includes: a first sealing portion, which is arranged intersecting with the side beam;

[0020] At least a portion of the orthographic projection of the first sealing portion in the first direction is located between the first fastener and the second fastener.

[0021] Optionally, at least a portion of the orthographic projection of the first sealing portion in the first direction is located between the first fastener and the third sealing groove;

[0022] Alternatively, at least a portion of the orthographic projection of the first sealing portion in the first direction is located between the second fastener and the third sealing groove.

[0023] Optionally, the sealing element includes: a first sealing element, a second sealing element, and a third sealing element; the first sealing element is embedded in the first sealing groove;

[0024] The second seal is embedded in the second sealing groove;

[0025] The third sealing element is embedded in the third sealing groove;

[0026] The first seal, the second seal, and the third seal are integrally formed.

[0027] Optionally, two third sealing grooves are provided, and the two third sealing grooves are spaced apart along the second direction and surround the first sealing groove and the second sealing groove to form the sealing area;

[0028] The vehicle seal includes two first sealing portions, which are spaced apart along the second direction, and at least a portion of the orthographic projection of the two first sealing portions in the first direction is located within the sealing area.

[0029] Optionally, the sealant is a sealant.

[0030] Optionally, the depth of the sealing groove is 0.5mm to 1mm.

[0031] Optionally, the width of the sealing groove is 3mm to 9mm.

[0032] Optionally, the vehicle seal is a foam seal.

[0033] Optionally, the side beam is provided with a first connecting hole, which is located outside the sealing area;

[0034] The cover plate is provided with a second connection hole at the corresponding position of the first connection hole;

[0035] The first fastener passes through the second connecting hole and is at least connected to the first connecting hole;

[0036] And / or, the side beam is provided with a third connecting hole, the third connecting hole being located within the sealing area;

[0037] The cover plate is provided with a fourth connection hole at the corresponding position of the third connection hole;

[0038] The second fastener passes through the fourth connecting hole and is connected to at least the third connecting hole.

[0039] Optionally, the first connecting hole and / or the third connecting hole are blind holes.

[0040] Optionally, the extension direction of the side beam is a second direction, which intersects with the first direction, and multiple first fasteners are provided, with the multiple first fasteners spaced apart along the second direction;

[0041] And / or, the second fastener is provided with a plurality of the second fasteners along the second

[0042] Directional spacing settings.

[0043] Secondly, this application also discloses an electrical device, including the aforementioned battery pack.

[0044] In this embodiment, a sealing structure is provided between the side beam and the cover plate, thereby achieving a sealed connection between the side beam and the cover plate, and thus ensuring reliable sealing of the battery pack itself. More importantly, since multiple seals in the sealing structure at least enclose a sealing area, with the first fastener located outside the sealing area and the second fastener located within the sealing area, when at least a portion of the orthographic projection of the vehicle's seals in the first direction is located between the first and second fasteners, moisture can be blocked from flowing from the first fastener located outside the sealing area to the second fastener located within the sealing area, thereby preventing moisture from entering the passenger compartment and achieving reliable sealing of the entire vehicle.

[0045] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0046] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0047] Figure 1 This is a schematic diagram of the structure of a battery pack provided in an embodiment of this application;

[0048] Figure 2 This is a schematic diagram of the structure of the pallet and vehicle seal provided in the embodiments of this application;

[0049] Figure 3 yes Figure 2 A magnified view of a portion of position A in the middle.

[0050] Reference numerals: 100, battery pack; 1, tray; 11, side beam; 111, first connecting hole; 112, third connecting hole; 2, cover plate; 21, second connecting hole; 22, fourth connecting hole; 3, vehicle seal; 31, first sealing part; 32, second sealing part; 33, third sealing part; 4, sealing structure; 41, sealing area; 42, first sealing groove; 43, second sealing groove; 44, third sealing groove; 45, first seal; 46, second seal; 47, third seal; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0051] The embodiments of this utility model will now be described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0052] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0053] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0054] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0055] This application provides a battery pack, which will be described in detail below with reference to the accompanying drawings.

[0056] Reference Figure 1 This document shows a schematic diagram of the structure of a battery pack according to an embodiment of this application. (Refer to...) Figure 2 This shows a structural schematic diagram of the tray and vehicle seal provided in an embodiment of this application, with reference to... Figure 3 , showed Figure 2A magnified view of a portion of position A. It should be noted that this magnification is intended to clearly illustrate the positional relationship between the sealing structure and the vehicle's overall seals. Figure 2 and Figure 3 The cover plate was removed.

[0057] like Figures 1 to 3 As shown, this application provides a battery pack 100, including: a tray 1, a sealing structure 4, a cover plate 2, and a vehicle seal 3 arranged sequentially along a first direction X; the tray 1 includes a side beam 11, which is connected to the cover plate 2 by fasteners (not shown in the figure); the sealing structure 4 includes a plurality of seals, which at least enclose a sealing area 41, the fastener located outside the sealing area 41 is a first fastener, and the fastener located inside the sealing area 41 is a second fastener; the vehicle seal 3 extends circumferentially along the cover plate 2, and at least a portion of the orthographic projection of the vehicle seal 3 in the first direction X is located between the first fastener and the second fastener.

[0058] In this embodiment, a sealing structure 4 is provided between the side beam 11 and the cover plate 2, thereby achieving a sealed connection between the side beam 11 and the cover plate 2, and thus ensuring a reliable seal for the battery pack 100 itself. More importantly, since the multiple seals of the sealing structure 4 at least enclose a sealing area 41, wherein the first fastener is located outside the sealing area 41 and the second fastener is located inside the sealing area 41, when at least a portion of the orthographic projection of the vehicle seal 3 in the first direction X is located between the first fastener and the second fastener, moisture can be blocked from flowing from the first fastener located outside the sealing area 41 to the second fastener located inside the sealing area 41, thereby preventing moisture from entering the passenger compartment and achieving a reliable seal for the entire vehicle.

[0059] It should be noted that the cover plate 2 in this embodiment can be a regular cover plate or a liquid-cooled plate. When a liquid-cooled plate is used as the cover plate 2, the number of components in the battery pack 100 can be further reduced, which helps to simplify the structure of the battery pack 100 and reduce its cost. Furthermore, the tray 1 is provided with a receiving cavity for accommodating the battery body. By connecting the cover plate 2 to the side beam 11 of the tray 1, the receiving cavity can be sealed, placing the battery body within a closed space and effectively preventing moisture, dust, and other foreign objects from entering the receiving cavity, thereby achieving effective protection of the battery body. In addition, in this embodiment, the first direction X refers to the height direction of the battery pack 100, the second direction Y refers to either the length direction or the width direction of the battery pack 100, and the third direction Z refers to the other of the length direction or the width direction of the battery pack 100. In one embodiment, the second direction Y refers to the length direction of the battery pack 100, and the third direction Z refers to the width direction of the battery pack 100.

[0060] Generally speaking, such as Figure 2As shown, the tray 1 typically has a rectangular cross-sectional shape perpendicular to the first direction X. The tray 1 includes two first side beams extending along the second direction Y and two second side beams extending along the third direction Z. The two second side beams are positioned between and connected to the two first side beams. The aforementioned side beams 11 can be either first or second side beams, and those skilled in the art can design them according to actual needs. In one embodiment, due to the vehicle's width limitations, the vehicle seal 3 is typically intersected with at least one first side beam, resulting in some fasteners being located inside the vehicle seal 3 and some fasteners being located outside the vehicle seal 3, leading to a vehicle seal failure. Therefore, the sealing structure 4 only needs to form the aforementioned sealing area 41 at the corresponding position of the first side beam.

[0061] Furthermore, this application does not limit the type of vehicle seal 3, and those skilled in the art can select it according to actual needs. In one embodiment, the vehicle seal 3 is a foam seal. Sealing foam has excellent sealing performance and can effectively prevent moisture, dust, or other foreign objects from entering the passenger compartment through the gap between the cover 2 and the vehicle body, ensuring the overall sealing effect of the vehicle. In addition, the sealing foam has low density and light weight, which is beneficial to the lightweight design of the battery pack 100.

[0062] In some alternative embodiments of this application, such as Figure 3 As shown, the sealing structure 4 also includes: a plurality of sealing grooves, which are disposed on the side of the side beam 11 near the cover plate 2 and are interconnected; at least one sealing element is embedded in one sealing groove to at least enclose and form a sealing area 41.

[0063] In this embodiment, on the one hand, because a sealing groove is provided, the sealing element can be positioned and installed by embedding it in the sealing groove, which helps to improve the sealing reliability between the side beam 11 and the cover plate 2. On the other hand, since multiple sealing grooves are interconnected, a continuous sealing path can be formed. Thus, by embedding at least one sealing element in each sealing groove, a sealing area 41 that can isolate the first fastener and the second fastener can be formed, effectively preventing external moisture from entering the passenger compartment and achieving reliable sealing of the entire vehicle.

[0064] It should be noted that the embodiments of this application do not limit the number of sealing elements and sealing grooves, and those skilled in the art can adjust them according to actual needs. In one embodiment, the number of sealing elements and sealing grooves is the same, and a reliable seal between the side beam 11 and the cover plate 2 is achieved by embedding one sealing element in one sealing groove.

[0065] Furthermore, this application does not limit the type of sealing element, and those skilled in the art can select one according to actual needs. In one embodiment, the sealing element is a sealant, which has good waterproof performance, adhesion, and durability. It not only prevents moisture from entering the battery pack 100 through the gap between the side beam 11 and the cover plate 2, but also enhances the connection strength between the side beam 11 and the cover plate 2. The sealant includes, but is not limited to, polyurethane adhesive, acrylic adhesive, epoxy adhesive, silicone adhesive, modified silane adhesive, etc.

[0066] In practical applications, after the side beam 11 and the cover plate 2 are fastened, sealant can be applied into the sealing groove through the gap between the side beam 11 and the cover plate 2, so that the sealant fills the sealing groove. After the sealant cures, not only can a reliable seal be achieved between the side beam 11 and the cover plate 2, effectively preventing external moisture from entering the interior of the tray 1 through the gap between the side beam 11 and the cover plate 2, but the first fastener and the second fastener can also be separated, effectively preventing external moisture from flowing from the first fastener to the second fastener, thus avoiding the problem of overall vehicle sealing failure.

[0067] In some alternative embodiments of this application, such as Figure 3 As shown, the extension direction of the side beam 11 is the second direction Y, which intersects with the first direction X. The sealing groove includes a first sealing groove 42, a second sealing groove 43, and a third sealing groove 44. The first sealing groove 42 and the second sealing groove 43 are spaced apart and extend along the second direction Y. The third sealing groove 44 is disposed between the first fastener and the second fastener and communicates with the first sealing groove 42 and the second sealing groove 43 respectively. Specifically, the first sealing groove 42 is disposed near the center of the tray 1, and the second sealing groove 43 is disposed away from the center of the tray 1. That is, the first sealing groove 42 is disposed near the receiving cavity of the tray 1, and the second sealing groove 43 is disposed away from the receiving cavity of the tray 1.

[0068] In this embodiment, the first sealing groove 42, when filled with a sealing element, achieves a primary seal between the side beam 11 and the cover plate 2. The second sealing groove 43, when filled with a sealing element, achieves a secondary seal between the side beam 11 and the cover plate 2, further improving the sealing effect. The third sealing groove 44, which communicates with both the first and second sealing grooves 42 and 43, forms a sealing area 41 that separates the first and second fasteners when filled with a sealing element. This effectively prevents external moisture from entering the passenger compartment, ensuring reliable sealing of the entire vehicle.

[0069] In some optional embodiments of this application, both the first sealing groove 42 and the second sealing groove 43 extend along the second direction Y to both ends of the side beam 11. This achieves a two-stage seal between the side beam 11 and the cover plate 2, which improves the sealing effect between them. In one embodiment, both the first sealing groove 42 and the second sealing groove 43 are disposed through the side beam 11 along the second direction Y. This further reduces the processing difficulty of the pallet without affecting the sealing performance.

[0070] In some optional embodiments of this application, the first sealing groove 42 is disposed near the center of the tray 1, and the second sealing groove 43 is disposed away from the center of the tray 1; the first sealing groove 42 is disposed on the outer side of the vehicle seal 3 and extends at least partially between the first fastener and the second fastener; the second sealing groove 43 is disposed on the inner side of the vehicle seal 3 and extends at least partially between the first fastener and the second fastener. Wherein, "the first sealing groove 42 is disposed near the center of the tray 1" also means "the first sealing groove 42 is disposed near the receiving cavity of the tray 1"; "the second sealing groove 43 is disposed away from the center of the tray 1" also means "the second sealing groove 43 is disposed away from the receiving cavity of the tray 1".

[0071] In this embodiment, by connecting the third sealing groove 44 with the first sealing groove 42 and the second sealing groove 43 respectively, a complete primary seal can be formed, thereby achieving a reliable seal between the side beam 11 and the cover plate 2. Moreover, compared to the first sealing groove 42 and the second sealing groove 43 extending to both ends of the side beam 11, when the first sealing groove 42 and the second sealing groove 43 are only provided locally on the side beam 11, the processing difficulty of the sealing structure 4 can be reduced, the amount of filling sealant (such as sealant) used can be reduced, which is beneficial to further reduce the cost of the battery pack 100.

[0072] It should be noted that the vehicle seal 3 is usually annular. "Inner side of vehicle seal 3" refers to the side of vehicle seal 3 closer to its center, and "outer side of vehicle seal 3" refers to the side of vehicle seal 3 away from its center.

[0073] In some alternative embodiments of this application, such as Figure 2 and Figure 3As shown, the vehicle seal 3 includes a first sealing portion 31, which is intersected with the side beam 11. At least a portion of the orthographic projection of the first sealing portion 31 in the first direction X is located between the first fastener and the second fastener. Further, at least a portion of the orthographic projection of the first sealing portion 31 in the first direction X is located between the first fastener and the third sealing groove 44; or, at least a portion of the orthographic projection of the first sealing portion 31 in the first direction X is located between the second fastener and the third sealing groove 44. This allows for relatively flexible positioning of the first sealing portion 31, eliminating the need for strict alignment during assembly and reducing the assembly difficulty of the battery pack 100 while achieving vehicle sealing.

[0074] It is understood that the first sealing part 31 and the third sealing groove 44 can also be arranged overlappingly. Since the width of the first sealing part 31 is usually greater than that of the third sealing groove 44, "overlapping arrangement" can be understood as at least a portion of the orthographic projection of the first sealing part 31 in the first direction X coincides with the orthographic projection of the third sealing groove 44 in the first direction X. This is not limited here, and those skilled in the art can make adjustments according to actual needs.

[0075] In some optional embodiments of this application, two third sealing grooves 44 are provided, and the two third sealing grooves 44 are spaced apart along the second direction Y and surround the first sealing groove 42 and the second sealing groove 43 to form a sealing region 41; the vehicle seal 3 includes: two first sealing parts 31, which are spaced apart along the second direction Y, and at least a portion of the orthographic projection of the two first sealing parts 31 in the first direction X is located within the sealing region 41. The sealing region 41 formed by the first sealing groove 42, the second sealing groove 43, and the two third sealing grooves 44 refers to the sealing element filling the first sealing groove 42, the second sealing groove 43, and the two third sealing grooves 44 forming the sealing region 41.

[0076] Generally, taking the first side beam as an example, the vehicle seal 3 typically has two intersecting positions with the first side beam, spaced apart along the second direction Y. In this embodiment, by setting two third sealing grooves 44 spaced apart along the second direction Y, since each third sealing groove 44 is connected to the first sealing groove 42 and the second sealing groove 43, by filling the sealing grooves (including the first sealing groove 42, the second sealing groove 43, and the third sealing groove 44) with seals, a sealing area 41 that isolates the first fastener and the second fastener can be formed, thereby preventing moisture from entering the sealing area 41. Since at least a portion of the orthographic projection of the two first sealing portions 31 of the vehicle seal 3 in the first direction X is located within the sealing area 41, moisture cannot enter the passenger compartment, which is beneficial for achieving reliable sealing of the entire vehicle. In addition, the method of forming the sealing area 41 by using one interconnected first sealing groove 42, one second sealing groove 43, and two third sealing grooves 44 to form the sealing area is simple and can further simplify the structure of the first side beam and the tray 1, which is beneficial for further reducing the processing difficulty of the first side beam and the tray 1.

[0077] Furthermore, the vehicle seal 3 also includes a second sealing portion 32 extending along the third direction Z and a third sealing portion 33 extending along the second direction Y. The second sealing portion 32 is disposed on the inner side of the second side beam, and the third sealing portion 33 is disposed on the outer side of the first side beam. The first sealing portion 31 is intersected with the first side beam and is connected to the second sealing portion 32 and the third sealing portion 33 respectively.

[0078] In some alternative embodiments of this application, such as Figure 3 As shown, the sealing components include: a first seal 45, a second seal 46, and a third seal 47; the first seal 45 is embedded in a first sealing groove 42; the second seal 46 is embedded in a second sealing groove 43; and the third seal 47 is embedded in a third sealing groove 44; wherein the first seal 45, the second seal 46, and the two third seals 47 are integrally formed. This effectively prevents water leakage at the joints of the seals, further improving the sealing effect of the battery pack 100 itself and the overall sealing effect of the vehicle.

[0079] In some optional embodiments of this application, the depth of the sealing groove is 0.5mm to 1mm. This allows control over the amount of sealant (such as sealant) used to fill the sealing groove. Tests have shown that when the depth of the sealing groove is 0.5mm to 1mm, the amount of sealant used can be reduced while still providing sufficient sealing performance. This is beneficial for improving the sealing reliability of the sealing structure 4 and reducing its cost.

[0080] It should be noted that the specific depth of the sealing groove is not limited in the embodiments of this application. In addition, the depths of the first sealing groove 42, the second sealing groove 43, and the third sealing groove 44 can be the same or different, and those skilled in the art can adjust them according to actual needs. For example, taking the third sealing groove 44 as an example, the depth of the third sealing groove 44 can be 0.5mm, 0.6mm, 0.75mm, 0.9mm, 1mm, or other values.

[0081] In some optional embodiments of this application, the width of the sealing groove is 3mm to 9mm. This allows control over the amount of sealant (such as sealant) used to fill the sealing groove. Tests have shown that when the width of the sealing groove is 3mm to 9mm, the amount of sealant used can be reduced while still providing sufficient sealing performance. This is beneficial for improving the sealing reliability of the sealing structure 4 and reducing its cost.

[0082] It should be noted that the specific width of the sealing groove is not limited in the embodiments of this application. In addition, the widths of the first sealing groove 42, the second sealing groove 43, and the third sealing groove 44 may be the same or different, and those skilled in the art can adjust them according to actual needs. For example, taking the third sealing groove 44 as an example, the width of the third sealing groove 44 may be 3mm, 5mm, 6mm, 8mm, 9mm, or other values.

[0083] In some alternative embodiments of this application, such as Figure 1 and Figure 3 As shown, the side beam 11 is provided with a first connecting hole 111, which is located outside the sealing area 41; the cover plate 2 is provided with a second connecting hole 21 at the corresponding position of the first connecting hole 111; a first fastener passes through the second connecting hole 21 and is connected to at least the first connecting hole 111; and / or, the side beam 11 is provided with a third connecting hole 112, which is located inside the sealing area 41; the cover plate 2 is provided with a fourth connecting hole 22 at the corresponding position of the third connecting hole 112; a second fastener passes through the fourth connecting hole 22 and is connected to at least the third connecting hole 112.

[0084] In this embodiment, since the side beam 11 is provided with a first connecting hole 111 and a third connecting hole 112, and the cover plate 2 is provided with a second connecting hole 21 and a fourth connecting hole 22, a reliable connection between the side beam 11 and the cover plate 2 can be achieved by the first fastener passing through the second connecting hole 21 and being connected to at least the first connecting hole 111, and the second fastener passing through the fourth connecting hole 22 and being connected to at least the third connecting hole 112.

[0085] It should be noted that the specific types of the first and second fasteners are not limited in the embodiments of this application, and those skilled in the art can make adjustments according to actual needs. In one embodiment, the first and / or second fasteners can be bolts, and correspondingly, the first connecting hole 111 and / or the third connecting hole 112 are threaded holes. A reliable connection between the side beam 11 and the cover plate 2 can be achieved through the threaded engagement of the bolt and the threaded hole. Further, the second connecting hole 21 and / or the fourth connecting hole 22 can be smooth holes or threaded holes. When the second connecting hole 21 and / or the fourth connecting hole 22 are threaded holes, the first fastener can be connected to both the second connecting hole 21 and the first connecting hole 111 simultaneously for fastening, and the second fastener can be connected to both the fourth connecting hole 22 and the third connecting hole 112 simultaneously for fastening.

[0086] It should be noted that the embodiments of this application do not limit the number of first fasteners and / or second fasteners, and those skilled in the art can adjust them according to actual needs. In one embodiment, the extension direction of the side beam 11 is the second direction Y, which intersects with the first direction X. Multiple first fasteners are provided, spaced apart along the second direction Y; and / or, multiple second fasteners are provided, spaced apart along the second direction Y. Thus, by providing multiple first fasteners and multiple second fasteners, the connection reliability between the side beam 11 and the cover plate 2 can be further improved.

[0087] In some optional embodiments of this application, the first connection hole 111 and / or the third connection hole 112 are blind holes. This effectively prevents moisture from entering the tray 1 through the first connection hole 111 and / or the third connection hole 112, which helps to further improve the self-sealing effect of the battery pack 100.

[0088] In summary, the battery pack provided in this application embodiment has at least the following advantages:

[0089] In this embodiment, a sealing structure is provided between the side beam and the cover plate, thereby achieving a sealed connection between the side beam and the cover plate, and thus ensuring reliable sealing of the battery pack itself. More importantly, since multiple seals in the sealing structure at least enclose a sealing area, with the first fastener located outside the sealing area and the second fastener located within the sealing area, when at least a portion of the orthographic projection of the vehicle's seals in the first direction is located between the first and second fasteners, moisture can be blocked from flowing from the first fastener located outside the sealing area to the second fastener located within the sealing area, thereby preventing moisture from entering the passenger compartment and achieving reliable sealing of the entire vehicle.

[0090] This application embodiment also provides an electrical device, including the battery pack 100 described above.

[0091] It should be noted that in this embodiment, the structure of the battery pack 100 is the same as that of the battery pack 100 in any of the above embodiments, and its beneficial effects are similar, so it will not be described again here. In addition, the electrical equipment in this embodiment includes, but is not limited to, vehicles, ferries, computers, aircraft, energy storage devices or other equipment, and is not limited here. Those skilled in the art can make adjustments according to actual needs.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: The tray, sealing structure, cover plate, and vehicle seals are arranged sequentially along the first direction; The pallet includes a side beam, which is connected to the cover plate by fasteners; The sealing structure includes a plurality of sealing elements, which at least enclose a sealing area. The fastener located outside the sealing area is a first fastener, and the fastener located within the sealing area is a second fastener. The vehicle seal extends circumferentially along the cover plate, and at least a portion of the orthographic projection of the vehicle seal in the first direction is located between the first fastener and the second fastener.

2. The battery pack according to claim 1, characterized in that, The sealing structure includes: a plurality of sealing grooves, the sealing grooves being disposed on the side of the side beam near the cover plate, and the plurality of sealing grooves being interconnected; One of the sealing grooves is fitted with at least one of the sealing elements to at least enclose the sealing area.

3. The battery pack according to claim 2, characterized in that, The extension direction of the side beam is a second direction, which intersects with the first direction. The sealing groove includes a first sealing groove, a second sealing groove, and a third sealing groove. The first sealing groove and the second sealing groove are spaced apart and extend along the second direction; The third sealing groove is disposed between the first fastener and the second fastener and is connected to the first sealing groove and the second sealing groove respectively.

4. The battery pack according to claim 3, characterized in that, Both the first sealing groove and the second sealing groove extend along the second direction to both ends of the side beam.

5. The battery pack according to claim 3, characterized in that, The first sealing groove is located close to the center of the tray, and the second sealing groove is located away from the center of the tray; The first sealing groove is disposed on the outside of the vehicle seal and extends at least partially between the first fastener and the second fastener; The second sealing groove is disposed on the inner side of the vehicle seal and extends at least partially between the first fastener and the second fastener.

6. The battery pack according to claim 3, characterized in that, The vehicle sealing component includes: a first sealing part, which is arranged intersecting the side beam; At least a portion of the orthographic projection of the first sealing portion in the first direction is located between the first fastener and the second fastener.

7. The battery pack according to claim 6, characterized in that, At least a portion of the orthographic projection of the first sealing portion in the first direction is located between the first fastener and the third sealing groove; Alternatively, at least a portion of the orthographic projection of the first sealing portion in the first direction is located between the second fastener and the third sealing groove.

8. The battery pack according to claim 3, characterized in that, The sealing element includes: a first sealing element, a second sealing element, and a third sealing element; The first sealing element is embedded in the first sealing groove; The second seal is embedded in the second sealing groove; The third sealing element is embedded in the third sealing groove; The first seal, the second seal, and the third seal are integrally formed.

9. The battery pack according to claim 3, characterized in that, Two third sealing grooves are provided, and the two third sealing grooves are spaced apart along the second direction and surround the first sealing groove and the second sealing groove to form the sealing area; The vehicle seal includes two first sealing portions, which are spaced apart along the second direction, and at least a portion of the orthographic projection of the two first sealing portions in the first direction is located within the sealing area.

10. The battery pack according to any one of claims 2-9, characterized in that, The sealing element is a sealant.

11. The battery pack according to any one of claims 2-9, characterized in that, The depth of the sealing groove is 0.5mm to 1mm.

12. The battery pack according to any one of claims 2-9, characterized in that, The width of the sealing groove is 3mm to 9mm.

13. The battery pack according to any one of claims 1-9, characterized in that, The vehicle seals are foam seals.

14. The battery pack according to any one of claims 1-9, characterized in that, The side beam is provided with a first connecting hole, which is located outside the sealing area; The cover plate is provided with a second connection hole at the corresponding position of the first connection hole; The first fastener passes through the second connecting hole and is at least connected to the first connecting hole; And / or, the side beam is provided with a third connecting hole, the third connecting hole being located within the sealing area; The cover plate is provided with a fourth connection hole at the corresponding position of the third connection hole; The second fastener passes through the fourth connecting hole and is connected to at least the third connecting hole.

15. The battery pack according to claim 14, characterized in that, The first connecting hole and / or the third connecting hole are blind holes.

16. The battery pack according to claim 14, characterized in that, The extension direction of the side beam is a second direction, which intersects with the first direction. Multiple first fasteners are provided, and the multiple first fasteners are spaced apart along the second direction. And / or, the second fastener is provided in multiples, and the multiple second fasteners are spaced apart along the second direction.

17. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1-16.

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