Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, and relates to the technical field of power batteries. The battery pack comprises a beam frame assembly, a liquid cooling plate and a first connecting piece; the battery pack has a first direction, a second direction and a third direction which are perpendicular to one another, the beam frame assembly comprises a box body beam extending in the second direction, the liquid cooling plate is connected to one side of the box body beam in the third direction, a first connecting hole is formed in the end, facing the liquid cooling plate, of the box body beam, and the box body beam is provided with oppositely-arranged side plates in the first direction; a first avoiding hole is formed in at least one side plate in a penetrating mode in the first direction, and the first avoiding hole and the first connecting hole are both communicated with the mounting space of the box body beam; the first connecting piece sequentially penetrates through the liquid cooling plate and the first connecting hole and is connected with the box beam, and the projection of the first end of the first connecting piece in the plane where the side plate provided with the first avoiding hole is located is located in the first avoiding hole. According to the battery pack provided by the invention, the situation that the first connecting piece is not assembled in place and the beam frame assembly is extruded to be deformed and damaged can be avoided.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a battery pack and an electrical device. Background Art

[0002] A battery pack generally includes a box structure and a battery module disposed in the box structure. When heat dissipation of the battery module in the box structure is required, a separate liquid cooling structure is provided in the box structure of the battery pack, such as a liquid cooling plate provided in the box structure, or a liquid cooling plate provided at the bottom of the tray of the battery module.

[0003] In order to improve the integration of the battery pack, the liquid cooling structure is integrated into the box structure of the battery pack. However, when assembling the box structure and the liquid cooling structure of the existing battery pack, due to the tolerance of the parts, the screws may be skewed and abut against the box structure when assembling the screws, which may cause the screws to be assembled incorrectly or squeeze and deform the box structure and damage it. Utility Model Content

[0004] The present application provides a battery pack and an electrical device to prevent the first connecting member from being improperly assembled and to prevent the beam frame assembly from being deformed and damaged due to the squeezing action of the first connecting member.

[0005] The present application provides a battery pack, including a beam frame assembly, a liquid cooling plate, and a first connecting member;

[0006] The battery pack has a first direction, a second direction and a third direction perpendicular to each other, the beam assembly includes a box beam extending along the second direction, an installation space is provided in the box beam, the liquid cooling plate is connected to one side of the box beam along the third direction, a first connecting hole is provided on one end of the box beam facing the liquid cooling plate along the third direction, the box beam has two side plates arranged oppositely along the first direction, a first avoidance hole is penetrated on at least one of the side plates along the first direction, and both the first avoidance hole and the first connecting hole are connected to the installation space;

[0007] The first connecting member has a first end, which is sequentially passed through the liquid cooling plate and the first connecting hole and connected to the box beam, and a projection of the first end in a plane where the side plate having the first avoidance hole is located is located in the first avoidance hole.

[0008] Based on the above technical solution, the battery pack provided by the present application, when the first connecting member is connected to the liquid cooling plate and the beam frame assembly through the first connecting member, when the first connecting member is skewed toward the side plate direction of the beam frame assembly due to structural tolerance, the first end of the first connecting member can be inserted into the first avoidance hole and extend toward the external environment of the box beam through the first avoidance hole to avoid the first connecting member from abutting against the box beam, thereby preventing the first connecting member from being assembled improperly due to the obstruction of the box beam, and also preventing the box beam from being deformed and damaged due to the squeezing of the first connecting member, thereby improving the assembly yield of the battery pack. At the same time, the first avoidance hole is opened on the box beam to achieve the weight reduction effect of the box beam, reduce the overall weight of the battery pack, facilitate transportation, and reduce the self-weight of the electrical device and energy consumption.

[0009] In some possible implementations, the first connecting member includes a first connecting column and a first flange located at one end of the first connecting column;

[0010] The first flange abuts against a side of the liquid cooling plate away from the box beam, and the first connecting column penetrates the first connecting hole and is connected to an inner wall of the first connecting hole.

[0011] In some possible implementations, the first avoidance holes are provided on both side plates of the box beam along the first direction.

[0012] In some possible implementations, in the second direction, the box beam is provided with a plurality of the first connecting holes and a plurality of the first avoiding holes that are spaced apart from each other, and one first avoiding hole is provided for at least one corresponding first connecting hole.

[0013] In some possible implementations, the battery pack further includes a bottom guard plate connected to a side of the liquid cooling plate facing away from the box beam;

[0014] A second connecting hole is further provided on one end of the box beam along the third direction facing the liquid cooling plate, the second connecting hole is spaced apart from the first connecting hole, a second avoiding hole is penetrated through at least one of the side plates along the first direction, the second avoiding hole is spaced apart from the first avoiding hole, and both the second avoiding hole and the second connecting hole are connected to the installation space;

[0015] The battery pack also includes a second connecting member, which is sequentially penetrated through the bottom guard plate, the liquid cooling plate and the second connecting hole and is connected to the box beam. The projection of one end of the second connecting member away from the bottom guard plate within the plane of the side panel where the second avoidance hole is located is located in the second avoidance hole.

[0016] In some possible implementations, the second connecting member includes a rivet nut and a rivet bolt sequentially connected along the third direction, and the rivet nut is passed through the second connecting hole and riveted to the box beam;

[0017] The rivet bolt includes a screw portion and a second flange located at one end of the screw portion. The screw portion is sequentially passed through the bottom guard plate, the liquid cooling plate and the rivet nut and is threadedly connected to the rivet nut. The second flange abuts against a side of the bottom guard plate away from the liquid cooling plate.

[0018] In some possible embodiments, in the third direction, a groove is provided at the position of the second connecting hole at one end of the liquid cooling plate facing the bottom guard plate, and a boss is provided at one end of the bottom guard plate facing the liquid cooling plate, the boss is inserted into the groove, and the boss is in contact with the inner wall of the groove.

[0019] In some possible implementations, the beam frame assembly further includes a box frame, the box frame is arranged to form a receiving cavity, the box beam is located in the receiving cavity and is detachably connected to the box frame.

[0020] In some possible implementations, the first connection hole and the second connection hole are arranged at intervals at one end of the box frame facing the liquid cooling plate;

[0021] The first connecting member is disposed at the first connecting hole of the box frame, and the first connecting member is sequentially passed through the liquid cooling plate and the first connecting hole of the box frame, and connected to the box frame;

[0022] The second connecting member is disposed at the position of the second connecting hole of the box frame. The second connecting member is sequentially passed through the bottom guard plate, the liquid cooling plate and the second connecting hole of the box frame and connected to the box frame.

[0023] In some possible embodiments, the battery pack further includes a limit member and a sealing assembly, wherein the limit member and the sealing assembly are both located between the box frame and the liquid cooling plate, and the sealing assembly is located on the side of the limit member facing the accommodating cavity, and when the box frame and the liquid cooling plate are connected via the first connecting member, the sealing assembly is compressed along the third direction, and the limit member limits the compression amount of the sealing assembly in the third direction.

[0024] In addition, the present application also provides an electrical device, comprising the battery pack provided in the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of an exploded structure of a battery pack in some embodiments is shown;

[0027] Figure 2 Shows Figure 1 A schematic diagram of the partially enlarged structure of part A;

[0028] Figure 3 A schematic diagram of the structure of the first connecting member in some embodiments is shown;

[0029] Figure 4 A schematic diagram of the structure of the second connecting member before riveting in some embodiments is shown;

[0030] Figure 5 A schematic diagram of the structure of the second connecting member after riveting in some embodiments is shown;

[0031] Figure 6 A schematic diagram of a top view of a battery pack in some embodiments is shown;

[0032] Figure 7 Shows Figure 6 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0033] Figure 8 Shows Figure 7 A schematic diagram of the local enlarged structure of part C in the middle;

[0034] Fig. 9 Shows Figure 6 Schematic diagram of the explosion cross-section structure in the middle BB direction;

[0035] Fig.10 Shows Fig. 9 A schematic diagram of the local enlarged structure of the D part;

[0036] Fig.11 Shows a schematic diagram of the structure of the beam frame assembly in some embodiments;

[0037] Fig.12 Shows Fig.11 A schematic diagram of the local enlarged structure of part E in the middle;

[0038] Fig.13 A partial structural schematic diagram of a box beam in some embodiments is shown;

[0039] Fig.14 A partial structural schematic diagram of a sealing assembly in some embodiments is shown.

[0040] Description of main component symbols:

[0041] 1000-battery pack;

[0042] 100-beam assembly; 110-box frame; 111-abutting flange; 112-accommodating cavity; 120-box beam; 1201-top plate; 1202-bottom plate; 1203-installation space; 1204-side plate; 121-notch; 122-first avoidance hole; 123-second avoidance hole; 124-first connecting hole; 125-second connecting hole; 200-insulating structure layer; 300-liquid cooling plate; 310-groove; 400-bottom guard plate; 410-boss; 500-sealing assembly; 510-sealing pad; 520-sealing rubber ring; 610-first connecting member; 611-first end; 612-second end; 613-first connecting column; 614-first flange; 620-second connecting member; 621-rivet nut; 6211-second connecting column; 62111-fourth flange; 6212-third flange; 622-rivet bolt; 6221-screw portion; 6222-second flange;

[0043] 700 - insulation pad; 800 - adapter; 810 - first connection part; 820 - second connection part; 900 - limiter; X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0044] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] like Figure 1 and Fig.13 As shown, in the embodiment, a battery pack 1000 is provided, which can be applied to an electric device. The electric device may include but is not limited to a mobile phone, a portable device, a laptop computer, a battery car, an electric toy, an electric tool, an electric vehicle, a ship, and a spacecraft, etc. The battery pack 1000 is used to provide electric energy for the above-mentioned electric devices.

[0050] In the embodiment, the battery pack 1000 includes a beam assembly 100, a liquid cooling plate 300 and a first connector 610. In addition, the battery pack 1000 also has a first direction X, a second direction Y and a third direction Z that are perpendicular to each other. In some embodiments, the first direction X may be parallel to the length direction of the battery pack 1000, the second direction Y may be parallel to the width direction of the battery pack 1000, and the third direction Z may be parallel to the height direction of the battery pack 1000.

[0051] Among them, the beam assembly 100 includes a box beam 120 extending along the second direction Y. The box beam 120 may be a hollow tubular structure, and an installation space 1203 is configured inside it. Along the third direction Z, the liquid cooling plate 300 is connected to one side of the box beam 120. In the embodiment, a first connecting hole 124 is opened on the end of the box beam 120 facing the liquid cooling plate 300 along the third direction Z. In addition, the box beam 120 has two side plates 1204 arranged oppositely along the first direction X, and a first avoidance hole 122 is penetrated on at least one side plate 1204 along the first direction X. The first connecting hole 124 and the first avoidance hole 122 are both connected to the installation space 1203 of the box beam 120. Moreover, the first avoidance hole 122 is connected to the external environment of the box beam 120.

[0052] Combined with Figure 3 and Figure 7 , the first connecting member 610 has a first end 611. The first connecting member 610 is sequentially arranged through the liquid cooling plate 300 and the first connecting hole 124, and is connected to the box beam 120 to connect the liquid cooling plate 300 to the box beam 120. In the embodiment, the projection of the first end 611 in the plane where the side plate 1204 having the first avoidance hole 122 is located is located in the first avoidance hole 122.

[0053] When assembling the liquid cooling plate 300 and the beam assembly 100, due to structural tolerance, the first connector 610 may be skewed relative to the third direction Z. In the prior art, when the first connector 610 is skewed relative to the third direction Z, the first end 611 of the first connector 610 may abut against the side plate 1204 of the box beam 120, thereby hindering the assembly of the first connector 610, causing the first connector 610 to be not assembled in place, and at the same time, the side plate 1204 of the box beam 120 may also be deformed and damaged under the squeezing action of the first connector 610.

[0054] In the present application, when the first connector 610 is skewed relative to the third direction Z, specifically, when the first end 611 of the first connector 610 is skewed toward the side plate 1204 of the box beam 120, the first end 611 of the first connector 610 can be inserted into the first avoidance hole 122 and extend toward the external environment of the box beam 120 through the first avoidance hole 122, that is, the first avoidance hole 122 provides avoidance for the first end 611 of the first connector 610. In this way, the first end 611 of the first connector 610 can be prevented from abutting against the box beam 120, thereby preventing the first connector 610 from being improperly assembled due to the obstruction of the box beam 120, thereby preventing the liquid cooling plate 300 and the beam frame assembly 100 from being improperly assembled and shaking relative to each other. In addition, the box beam 120 can be prevented from being deformed and damaged due to the compression of the first end 611, thereby improving the assembly yield of the battery pack 1000.

[0055] At the same time, a first avoidance hole 122 is opened on the box beam 120. On the one hand, it can save the material usage of the box beam 120 and reduce the material cost. On the other hand, it can achieve the weight reduction effect of the box beam 120, that is, the weight reduction effect of the battery pack 1000 is achieved, reducing the overall weight of the battery pack 1000, facilitating transportation, and also reducing the weight of the electrical device itself and reducing energy consumption.

[0056] like Figure 1 , Figure 3 , Figure 8 and Fig.13 In the embodiment, the first end 611 of the first connecting member 610 extends along the third direction Z to the side away from the liquid cooling plate 300. The other end of the first connecting member 610 away from the first end 611 is the second end 612. Specifically, the first connecting member 610 includes a first connecting column 613 and a first flange 614. The first connecting column 613 extends from the first end 611 to the second end 612. The first flange 614 is disposed at one end of the first connecting column 613 and is disposed close to the second end 612.

[0057] The outer diameter of the first flange 614 is larger than the diameter of the first connection hole 124, and is limitedly abutted against the side of the liquid cooling plate 300 away from the box beam 120. The first connection column 613 is sequentially arranged through the liquid cooling plate 300 and the first connection hole 124, and is threadedly connected to the inner wall of the first connection hole 124. In this way, the liquid cooling plate 300 can be fixedly connected to one side of the box beam 120.

[0058] In other embodiments, the first connecting column 613 and the inner wall of the first connecting hole 124 may also be connected by interference fit or the like.

[0059] like Figure 1 and Fig.13 As shown, the first connection hole 124 may penetrate the end of the box beam 120 toward the liquid cooling plate 300 along the third direction Z. Specifically, the first connection hole 124 penetrates the bottom plate 1202 of the box beam 120 toward the liquid cooling plate 300 along the third direction Z. In some embodiments, the first avoidance hole 122 is penetrated along the first direction X on both side plates 1204 of the box beam 120.

[0060] In some other embodiments, the first avoidance hole 122 is formed along the first direction X on only one side plate 1204 of the box beam 120 .

[0061] like Figure 1 , Figure 6 , Figure 7 as well as Fig.13As shown, along the second direction Y, a plurality of first connection holes 124 may be provided on the box beam 120, and the plurality of first connection holes 124 are sequentially spaced apart. In addition, along the second direction Y, a plurality of first avoidance holes 122 may also be provided on the box beam 120, and the plurality of first avoidance holes 122 are sequentially spaced apart. The plurality of first avoidance holes 122 may correspond to the plurality of first connection holes 124 one by one, and the first avoidance holes 122 are connected to the corresponding first connection holes 124 through the installation space 1203.

[0062] In other embodiments, the first avoidance hole 122 may have a certain extension length in the second direction Y. Accordingly, one first avoidance hole 122 may also correspond to multiple first connection holes 124 at the same time, and the first avoidance hole 122 is connected to the corresponding multiple first connection holes 124 .

[0063] like Figure 1 and Fig.13 As shown, in some embodiments, the first avoidance hole 122 may extend along the third direction Z, and both ends opposite to the box beam 120 along the third direction Z are spaced apart. Specifically, there is a gap between the hole edge of the first avoidance hole 122 at one end close to the liquid cooling plate 300 and the bottom plate 1202 of the box beam 120. At the same time, there is also a gap between the hole edge of the first avoidance hole 122 at one end away from the liquid cooling plate 300 and the top plate 1201 of the box beam 120 at one end away from the liquid cooling plate 300. Thus, while providing avoidance for the first end 611 of the first connecting member 610 and reducing the weight of the box beam 120, it is possible to avoid the first avoidance hole 122 from extending a large size along the third direction Z and affecting the structural strength of the box beam 120, thereby ensuring the overall structural strength of the beam frame assembly 100.

[0064] like Figure 1 , Figures 6 to 8 as well as Fig.13 As shown, in some embodiments, the battery pack 1000 further includes a bottom guard plate 400 and a second connecting member 620. The bottom guard plate 400 is connected to a side of the liquid cooling plate 300 that is away from the box beam 120.

[0065] Correspondingly, the box beam 120 is also provided with a second connection hole 125 that penetrates the end of the box beam 120 toward the liquid cooling plate 300 along the third direction Z. In the second direction Y, the second connection hole 125 is spaced apart from the first connection hole 124. In addition, a second avoidance hole 123 is penetrated along the first direction X on at least one side plate 1204 in the box beam 120. The second avoidance hole 123 is located on the side of the second connection hole 125 away from the bottom guard plate 400. Both the second connection hole 125 and the second avoidance hole 123 are connected to the installation space 1203 inside the box beam 120. The projection of the end of the second connecting member 620 away from the bottom guard plate 400 in the plane where the side plate 1204 provided with the second avoidance hole 123 is located is located in the second avoidance hole 123. In some specific embodiments, the second avoidance holes 123 are penetrated along the first direction X on both side plates 1204 in the box beam 120.

[0066] Thus, when the bottom guard plate 400 and the box beam 120 are connected by the second connector 620, the second avoidance hole 123 can provide avoidance for the end of the second connector 620 that is away from the bottom guard plate 400. When the second connector 620 is skewed toward the side plate 1204, the end of the second connector 620 that is away from the bottom guard plate 400 can be prevented from abutting against the box beam 120, thereby preventing the second connector 620 from being assembled improperly due to the obstruction of the box beam 120, preventing the bottom guard plate 400 from being assembled improperly and shaking relative to the beam frame assembly 100, and preventing the box beam 120 from being squeezed by the second connector 620 and being deformed and damaged, thereby improving the assembly yield of the battery pack 1000.

[0067] At the same time, the second avoidance hole 123 is opened on the box beam 120, which can further save the material usage of the box beam 120 and reduce the material cost. At the same time, the weight reduction effect of the box beam 120 is further achieved, the overall weight of the battery pack 1000 is reduced, and the transportation is convenient, while also reducing the weight of the electrical device itself and reducing energy consumption.

[0068] In some other embodiments, the second avoidance hole 123 is penetrated along the first direction X on only one side plate 1204 of the box beam 120 .

[0069] Combined with Figure 4 and Figure 5, the second connecting member 620 includes a rivet nut 621 and a rivet bolt 622. The rivet nut 621 is inserted into the second connecting hole 125 and riveted to the bottom plate 1202 of the box beam 120. Specifically, the rivet nut 621 includes a second connecting column 6211 and a third flange 6212, and the third flange 6212 is located at one end of the second connecting column 6211. During assembly, the second connecting column 6211 is inserted into the second connecting hole 125. The outer diameter of the third flange 6212 is greater than the diameter of the second connecting hole 125, and the third flange 6212 abuts against the side of the bottom plate 1202 facing the liquid cooling plate 300. After the riveting process, the second connecting column 6211 is squeezed and deformed to form a fourth flange 62111 on the side of the bottom plate 1202 away from the liquid cooling plate 300 , and the outer diameter of the fourth flange 62111 is larger than the diameter of the second connecting hole 125 and abuts against the side of the bottom plate 1202 away from the liquid cooling plate 300 .

[0070] The rivet bolt 622 includes a screw portion 6221 and a second flange 6222 at one end of the screw portion 6221. The screw portion 6221 is sequentially inserted through the bottom guard plate 400, the liquid cooling plate 300 and the rivet nut 621, and is screwed with the rivet nut 621, and the second flange 6222 abuts against the side of the bottom guard plate 400 away from the liquid cooling plate 300. In this way, the bottom guard plate 400 can be installed and fixedly connected to the box beam 120.

[0071] It is understandable that the box beam 120 may be provided with a plurality of second connection holes 125 and a plurality of second avoidance holes 123. The plurality of second connection holes 125 may be sequentially spaced along the second direction Y and spaced and staggered with the first connection holes 124. The plurality of second avoidance holes 123 may be sequentially spaced along the second direction Y and spaced and staggered with the first avoidance holes 122. At the same time, the plurality of second avoidance holes 123 may be arranged one-to-one with the plurality of second connection holes 125.

[0072] In other embodiments, the second avoidance hole 123 may have a certain extension length in the second direction Y, and accordingly, one second avoidance hole 123 may also correspond to a plurality of second connection holes 125 at the same time.

[0073] like Figure 1 and Fig.13As shown, in some embodiments, the second avoidance hole 123 may extend along the third direction Z, and both ends opposite to the box beam 120 along the third direction Z are spaced apart. Specifically, there is a gap between the hole edge of the second avoidance hole 123 facing the liquid cooling plate 300 and the bottom plate 1202 of the box beam 120 facing the liquid cooling plate 300. At the same time, there is also a gap between the hole edge of the second avoidance hole 123 facing away from the liquid cooling plate 300 and the top plate 1201 of the box beam 120 facing away from the liquid cooling plate 300. Thus, while providing avoidance for the second connecting member 620 and reducing the weight of the box beam 120, it is possible to avoid the second avoidance hole 123 extending a large size along the third direction Z and affecting the structural strength of the box beam 120, thereby ensuring the structural strength of the box beam 120, and further ensuring the overall structural strength of the beam assembly 100.

[0074] like Figure 1 , Figure 2 , Figure 6 , Fig. 9 , Fig.10 and Fig.13 As shown, in the third direction Z, a groove 310 is provided on the liquid cooling plate 300 facing one end of the bottom guard plate 400 and corresponding to the position of the second connection hole 125, and a boss 410 is provided on the bottom guard plate 400 facing one end of the liquid cooling plate 300 and corresponding to the position of the second connection hole 125. In the embodiment, the boss 410 is inserted into the relative groove 310, and the surface of the boss 410 can fit with the inner wall of the groove 310. On the one hand, the pre-positioning of the bottom guard plate 400 and the liquid cooling plate 300 can be achieved, which facilitates the connection of the bottom guard plate 400 to the box frame 110 through the second connecting member 620. On the other hand, the assembly of the battery pack 1000 can be made tighter, thereby improving the stability of the assembly.

[0075] like Figure 1 As shown, the beam frame assembly 100 further includes a box frame 110. The box frame 110 is generally annular in structure and is surrounded by a receiving cavity 112. The box beam 120 is located in the receiving cavity 112 and is connected to the box frame 110. Specifically, the two ends of the box beam 120 are respectively connected to the inner walls of the box frame 110 on both sides.

[0076] It is understandable that the beam assembly 100 may include a plurality of box beams 120 , and the plurality of box beams 120 may be sequentially spaced apart along the first direction X. In the embodiment, the structures and installation methods of the plurality of box beams 120 may be similar.

[0077] Combined with Figures 11 to 13 The box beam 120 is detachably connected to the box frame 110. That is, the box beam 120 and the box frame 110 are separate structures, so that the first avoidance hole 122 and the second avoidance hole 123 can be easily processed on the box beam 120, reducing the processing difficulty and improving the processing efficiency.

[0078] Of course, in other implementations, the box beam 120 and the box frame 110 may also be connected in a non-detachable manner such as welding or integral molding.

[0079] In some embodiments, both ends of the box beam 120 are connected to the box frame 110 through an adapter 800. The adapter 800 is generally T-shaped. Specifically, the adapter 800 may include an integrated first connection portion 810 and a second connection portion 820. The first connection portion 810 may be fixedly connected to the inner wall of the box frame 110 facing the accommodating cavity 112 by screw connection, rivet connection or welding. The second connection portion 820 is protrudingly arranged on the side of the first connection portion 810 facing the accommodating cavity 112.

[0080] In addition, the inner wall of the box frame 110 facing the accommodating cavity 112 is also protrudingly provided with an abutting flange 111, and the abutting flange 111 can be located on the side of the adapter 800 facing the liquid cooling plate 300. A notch 121 communicating with the interior of the box beam 120 is provided at the end of the box beam 120 and the end facing the liquid cooling plate 300. And the end of the box beam 120 facing the box frame 110 is an open structure. In the embodiment, the end of the box beam 120 provided with the notch 121 can be covered by the end of the second connecting portion 820 away from the abutting flange 111 and abut against the end of the abutting flange 111 facing the second connecting portion 820. In the embodiment, the box beam 120 and the second connecting portion 820 can be further fixed by welding or screw connection.

[0081] like Figure 1 , Figures 5 to 7 as well as Fig.12 As shown, in some embodiments, the box frame 110 may be enclosed by a hollow tubular structure, that is, the interior of the box frame 110 is a hollow structure. The end of the box frame 110 facing the liquid cooling plate 300 may also be provided with a first connection hole 124 and a second connection hole 125, and the first connection hole 124 and the second connection hole 125 both penetrate the end of the box frame 110 facing the liquid cooling plate 300 along the third direction Z. In addition, the first connection hole 124 and the second connection hole 125 on the box frame 110 may be arranged at intervals.

[0082] Correspondingly, the first connection hole 124 may be provided with a first connection member 610, and the second connection hole 125 may be provided with a second connection member 620. The first connection member 610 is provided through the liquid cooling plate 300 and the first connection hole 124 and is threadedly connected to the inner wall of the first connection hole 124. In the second connection member 620, the rivet nut 621 is provided through the second connection hole 125 and is riveted to the box frame 110, the screw portion 6221 of the rivet bolt 622 is provided through the bottom guard plate 400, the liquid cooling plate 300 and the rivet nut 621 in sequence, and is threadedly connected to the rivet nut 621, and the second flange 6222 abuts against the side of the bottom guard plate 400 away from the box frame 110, so that the box frame 110 and the bottom guard plate 400 can be connected. Thus, the connection between the edge of the liquid cooling plate 300 and the beam assembly 100 , as well as the connection between the edge of the bottom guard plate 400 and the beam assembly 100 , can also be strengthened, thereby improving the tightness and stability of the assembly of the battery pack 1000 .

[0083] like Figure 1 , Figures 6 to 10 As shown, the battery pack 1000 further includes a sealing assembly 500 and a stopper 900. The sealing assembly 500 and the stopper 900 are both located between the beam assembly 100 and the liquid cooling plate 300. The sealing assembly 500 is located on the side of the stopper 900 facing the accommodating cavity 112. In some embodiments, the stopper 900 may be arranged along the box frame 110 and present a ring structure.

[0084] Of course, in other embodiments, a plurality of limiting members 900 may be arranged at intervals along the circumference of the box frame 110 and distributed evenly or unevenly.

[0085] When the liquid cooling plate 300 and the box frame 110 are connected by the first connector 610, the sealing assembly 500 may be compressed in the third direction Z. The stopper 900 may limit the compression amount of the sealing assembly 500 in the third direction Z to prevent the sealing assembly 500 from being damaged and ineffective due to excessive compression. Accordingly, when the sealing assembly 500 is not squeezed, one end of the sealing assembly 500 facing the liquid cooling plate 300 may protrude relative to one end of the stopper 900 facing the liquid cooling plate 300.

[0086] Combined with Fig.14 In some embodiments, the sealing assembly 500 may include a sealing gasket 510 and a sealing rubber ring 520. The sealing rubber ring 520 is arranged along the peripheral edge of the sealing gasket 510. In addition, the sealing rubber ring 520 may be located at one end of the sealing gasket 510 facing the box frame 110. In the embodiment, by arranging the sealing rubber ring 520 at one end of the sealing gasket 510 facing the box frame 110, the sealing performance of the connection position between the sealing assembly 500 and the box frame 110 can be improved.

[0087] In some embodiments, the battery pack 1000 further includes an insulating structure layer 200 and a heat preservation pad 700. The insulating structure layer 200 is disposed between the liquid cooling plate 300 and the sealing assembly 500. In an embodiment, the insulating structure layer 200 can be used to provide an insulating protection function. The heat preservation pad 700 can be disposed between the liquid cooling plate 300 and the bottom guard plate 400 to provide heat insulation protection for the liquid cooling plate 300 and reduce the loss of cooling capacity in the liquid cooling plate 300.

[0088] It is understandable that the battery pack 1000 may also include structures such as a battery module (not shown) and a battery management system (not shown), which will not be described in detail here.

[0089] In addition, an electric device is provided in the embodiment, including the battery pack 1000 provided in the embodiment. The electric device may include but is not limited to mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, electric vehicles, ships, and spacecraft.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0091] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery pack, characterized in that: It comprises a beam frame assembly (100), a liquid cooling plate (300) and a first connecting member (610); The battery pack has a first direction (X), a second direction (Y) and a third direction (Z) which are perpendicular to each other. The beam frame assembly (100) comprises a box beam (120) extending along the second direction (Y). An installation space (1203) is provided in the box beam (120). Along the third direction (Z), the liquid cooling plate (300) is connected to one side of the box beam (120). An end of the box beam (120) facing the liquid cooling plate (300) along the third direction (Z) is provided with a first connection hole (124). The box beam (120) has two side plates (1204) arranged opposite to each other along the first direction (X). A first avoidance hole (122) is provided on at least one of the side plates (1204) along the first direction (X). Both the first avoidance hole (122) and the first connection hole (124) are connected to the installation space (1203). The first connecting member (610) has a first end (611), the first connecting member (610) is sequentially passed through the liquid cooling plate (300) and the first connecting hole (124), and is connected to the box beam (120), and the projection of the first end (611) in the plane where the side plate (1204) provided with the first avoidance hole (122) is located is located in the first avoidance hole (122).

2. The battery pack according to claim 1, characterized in that: The first connecting member (610) comprises a first connecting column (613) and a first flange (614) located at one end of the first connecting column (613); The first flange (614) abuts against a side of the liquid cooling plate (300) facing away from the box beam (120), and the first connecting column (613) passes through the first connecting hole (124) and is connected to an inner wall of the first connecting hole (124).

3. The battery pack according to claim 1, characterized in that: The first avoidance holes (122) are provided on both side plates (1204) of the box beam (120) along the first direction (X).

4. The battery pack according to claim 1, characterized in that: In the second direction (Y), the box beam (120) is provided with a plurality of first connection holes (124) arranged at intervals, and a plurality of first avoidance holes (122) arranged at intervals, and one first avoidance hole (122) is arranged to correspond to at least one first connection hole (124).

5. The battery pack according to claim 1, characterized in that: The battery pack further comprises a bottom guard plate (400), wherein the bottom guard plate (400) is connected to a side of the liquid cooling plate (300) facing away from the box beam (120); A second connection hole (125) is further provided at one end of the box beam (120) along the third direction (Z) toward the liquid cooling plate (300), the second connection hole (125) being spaced apart from the first connection hole (124), a second avoidance hole (123) penetrating along the first direction (X) is provided on at least one of the side plates (1204), the second avoidance hole (123) being spaced apart from the first avoidance hole (122), and the second avoidance hole (123) and the second connection hole (125) are both in communication with the installation space (1203); The battery pack also includes a second connecting member (620), which is sequentially penetrated through the bottom guard plate (400), the liquid cooling plate (300) and the second connecting hole (125), and is connected to the box beam (120), and a projection of an end of the second connecting member (620) that is away from the bottom guard plate (400) in a plane where the side plate (1204) having the second avoidance hole (123) is located is located in the second avoidance hole (123).

6. The battery pack according to claim 5, characterized in that: The second connecting member (620) comprises a rivet nut (621) and a rivet bolt (622) connected in sequence along the third direction (Z), and the rivet nut (621) is passed through the second connecting hole (125) and riveted to the box beam (120); The rivet bolt (622) includes a screw portion (6221) and a second flange (6222) located at one end of the screw portion (6221), the screw portion (6221) is sequentially passed through the bottom guard plate (400), the liquid cooling plate (300) and the rivet nut (621), and is threadedly connected to the rivet nut (621), and the second flange (6222) is abutted against a side of the bottom guard plate (400) away from the liquid cooling plate (300).

7. The battery pack according to claim 5, characterized in that: In the third direction (Z), a groove (310) is provided at a position corresponding to the second connecting hole (125) on one end of the liquid cooling plate (300) facing the bottom guard plate (400), and a boss (410) is provided on one end of the bottom guard plate (400) facing the liquid cooling plate (300), and the boss (410) is inserted into the groove (310), and the boss (410) is in contact with the inner wall of the groove (310).

8. The battery pack according to claim 5, characterized in that: The beam frame assembly (100) further comprises a box frame (110), wherein the box frame (110) is arranged to form a receiving cavity (112), and the box beam (120) is located in the receiving cavity (112) and is detachably connected to the box frame (110).

9. The battery pack according to claim 8, characterized in that: The first connection hole (124) and the second connection hole (125) are arranged at intervals on one end of the box frame (110) facing the liquid cooling plate (300); The first connecting member (610) is disposed at the position of the first connecting hole (124) of the box frame (110), and the first connecting member (610) is sequentially inserted into the first connecting hole (124) of the liquid cooling plate (300) and the box frame (110), and is connected to the box frame (110); The second connecting member (620) is arranged at the position of the second connecting hole (125) of the box frame (110), and the second connecting member (620) is sequentially passed through the bottom guard plate (400), the liquid cooling plate (300) and the second connecting hole (125) of the box frame (110), and is connected to the box frame (110).

10. The battery pack according to claim 8, characterized in that: The battery pack further comprises a limiter (900) and a sealing assembly (500), wherein the limiter (900) and the sealing assembly (500) are both located between the box frame (110) and the liquid cooling plate (300), and the sealing assembly (500) is located on a side of the limiter (900) facing the accommodating cavity (112); when the box frame (110) and the liquid cooling plate (300) are connected via the first connecting member (610), the sealing assembly (500) is compressed along the third direction (Z), and the limiter (900) limits the amount of compression of the sealing assembly (500) in the third direction (Z).

11. An electrical device, characterized in that: Comprising a battery pack as claimed in any one of claims 1 to 10.

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