Battery pack and electrical device

Abstract

The present disclosure relates to the technical field of traction batteries. Provided are a battery pack and an electrical device. The battery pack comprises a beam frame assembly, a liquid-cooling plate and a first connecting member, wherein 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 case beam extending in the second direction, the liquid-cooling plate is connected to one side of the case beam in the third direction, a first connection hole is provided in the end of the case beam that faces the liquid cooling plate, the case beam is provided with side plates opposite to each other in the first direction, at least one of the side plates is provided with a first clearance hole penetrating in the first direction, and the first clearance hole and the first connection hole are both in communication with a mounting space of the case beam; and the first connecting member sequentially passes through the liquid-cooling plate and the first connection hole and is connected to the case beam, and a projection of a first end of the first connecting member on a plane where the side plate provided with the first clearance hole is located is located within the first clearance hole. The battery pack provided in the present disclosure can prevent the first connecting member from being improperly assembled and prevent the beam frame assembly from being squeezed, deformed and damaged.

Description

Battery pack and power-consuming device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202420564915.4, filed with the Patent Office of China on March 21, 2024, entitled “A Battery Pack and Electrical Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the technical field of power batteries, and in particular to a battery pack and an electrical device. Background Art

[0004] A battery pack generally consists of a box structure and battery modules housed within it. When heat dissipation is required for the battery modules within the box structure, this is achieved by installing a separate liquid cooling structure within the box structure. For example, a liquid cooling plate can be installed within the box structure, or at the bottom of the battery module tray.

[0005] To improve the integration of battery packs, liquid cooling systems are often integrated into the battery pack housing. However, due to component tolerances, when assembling the housing and liquid cooling systems, screws can become skewed and abut against the housing during assembly, potentially causing the screws to misalign or even deform and damage the housing.

[0006] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present disclosure and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0007] The present disclosure provides a battery pack and an electrical device, which can improve or even avoid the problem of improper assembly of a first connector fixing a liquid energy cold plate.

[0008] The embodiments of the present disclosure may be implemented as follows:

[0009] An embodiment of the present disclosure provides a battery pack, comprising a beam assembly, a liquid cooling plate, and a first connecting member;

[0010] The battery pack has a first direction, a second direction and a third direction that are perpendicular to each other;

[0011] The beam assembly includes a box beam extending along the second direction, an installation space is defined in the box beam, the liquid cooling plate is connected to one side of the box beam along the third direction, a first connection hole is defined on one end of the box beam facing the liquid cooling plate along the third direction, the box beam has two side plates oppositely disposed along the first direction, a first avoidance hole is defined through at least one of the side plates along the first direction, and both the first avoidance hole and the first connection hole are in communication with the installation space;

[0012] 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. The projection of the first end in the plane of the side panel where the first avoidance hole is located is located in the first avoidance hole.

[0013] Optionally, the first connecting member includes a first connecting column and a first flange located at one end of the first connecting column;

[0014] The first flange abuts against a side of the liquid cooling plate facing away from the box beam, and the first connecting column passes through the first connecting hole and is connected to an inner wall of the first connecting hole.

[0015] Optionally, the first avoidance holes are provided on both side panels of the box beam along the first direction.

[0016] Optionally, in the second direction, the box beam is provided with a plurality of the first connection holes and a plurality of the first avoidance holes arranged at intervals, and one first avoidance hole is provided for at least one corresponding first connection hole;

[0017] The first connecting members include a plurality of first connecting members, and the plurality of first connecting members are installed in a one-to-one correspondence in the first connecting holes.

[0018] Optionally, the battery pack further includes a bottom guard plate connected to a side of the liquid cooling plate facing away from the box beam;

[0019] A second connecting hole is further provided at one end of the box beam along the third direction facing the liquid cooling plate, the second connecting hole being spaced apart from the first connecting hole, a second avoidance hole is penetrated through at least one of the side panels along the first direction, the second avoidance hole being spaced apart from the first avoidance hole, the second avoidance hole and the second connecting hole both being in communication with the installation space; the second avoidance hole is correspondingly provided to the second connecting hole;

[0020] The battery pack further includes a second connecting member, which is sequentially passed through the bottom guard plate, the liquid cooling plate, and the second connecting hole, and is connected to the box beam to connect the bottom guard plate to the box beam;

[0021] The projection of the end of the second connecting member facing away from the bottom guard plate in the plane where the side plate provided with the second avoidance hole is located is located in the second avoidance hole.

[0022] Optionally, the second connecting member includes a rivet nut and a rivet bolt sequentially connected along the third direction, the rivet nut is passed through the second connecting hole and riveted to the box beam;

[0023] 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 the side of the bottom guard plate away from the liquid cooling plate.

[0024] Optionally, the box beam is a hollow tubular structure.

[0025] Optionally, the box beam further comprises a top plate and a bottom plate spaced apart in the third direction, wherein the top plate and the bottom plate are disposed between the two side plates and are both connected to the two side plates;

[0026] The top plate, the bottom plate and the two side plates enclose the installation space;

[0027] The first connecting hole and the second connecting hole are both provided on the bottom plate, and the liquid cooling plate is provided on one side of the bottom plate.

[0028] Optionally, the first connecting hole and the first avoiding hole are provided at the same length position of the box beam in the second direction;

[0029] The second connection hole and the second avoidance hole are arranged at the same length position of the box beam in the second direction.

[0030] Optionally, 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.

[0031] Optionally, the beam assembly further includes a box frame, which is arranged to form a receiving cavity. The box beam is located in the receiving cavity and is detachably connected to the box frame.

[0032] Optionally, the first connecting hole and the second connecting hole are provided at intervals on one end of the box frame facing the liquid cooling plate;

[0033] 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 is connected to the box frame;

[0034] The second connecting member is disposed at the second connecting hole position 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 is connected to the box frame.

[0035] Optionally, the battery pack further includes a limiter and a sealing assembly, both of which are located between the box frame and the liquid cooling plate, and the sealing assembly is located on the side of the limiter facing the accommodating cavity. 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 limiter limits the amount of compression of the sealing assembly in the third direction.

[0036] Optionally, the battery pack further includes an adapter, and both ends of the box beam are respectively connected to the box frame through the adapter.

[0037] Optionally, the first connecting member is a screw.

[0038] An embodiment of the present disclosure further provides an electrical device including the above-mentioned battery pack.

[0039] In combination with the above technical solutions, the beneficial effects brought about by the embodiments of the present disclosure include, for example:

[0040] When the liquid cooling plate and the beam assembly are connected via a first connector, if the first connector tilts toward the side panel of the beam assembly due to structural tolerance, the first end of the first connector can be inserted into the first avoidance hole and extend through the first avoidance hole toward the external environment of the box beam, thereby preventing the first connector from abutting the box beam. This can prevent the first connector from being improperly assembled due to obstruction by the box beam, and can also prevent the box beam from being deformed and damaged due to compression by the first connector, thereby improving the assembly yield of the battery pack. At the same time, the first avoidance hole in the box beam can achieve a weight reduction effect on the box beam, reducing the overall weight of the battery pack, facilitating transportation, and reducing the load on the electrical device itself, thereby reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0042] FIG1 shows a schematic diagram of an exploded structure of a battery pack in some embodiments;

[0043] FIG2 is a schematic diagram showing a partially enlarged structure of portion A in FIG1 ;

[0044] FIG3 shows a schematic structural diagram of a first connecting member in some embodiments;

[0045] FIG4 shows a schematic structural diagram of the second connecting member before riveting in some embodiments;

[0046] FIG5 is a schematic structural diagram of the second connecting member after riveting in some embodiments;

[0047] FIG6 is a schematic diagram showing a top view of a battery pack in some embodiments;

[0048] FIG7 shows a schematic cross-sectional view of the structure along the BB direction in FIG6 ;

[0049] FIG8 shows a schematic diagram of a partially enlarged structure of portion C in FIG7 ;

[0050] FIG9 shows a schematic diagram of the explosion cross-sectional structure along the BB direction in FIG6 ;

[0051] FIG10 shows a schematic diagram of a partially enlarged structure of portion D in FIG9 ;

[0052] FIG11 is a schematic structural diagram of a beam assembly in some embodiments;

[0053] FIG12 shows a schematic diagram of a partially enlarged structure of portion E in FIG11 ;

[0054] FIG13 is a schematic diagram showing a partial structure of a box beam in some embodiments;

[0055] FIG. 14 is a schematic diagram showing a partial structure of a sealing assembly in some embodiments.

[0056] Explanation of the main component symbols: 1000 - battery pack; 100 - beam assembly; 110 - box frame; 111 - abutment 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 connection hole; 125 - second connection hole; 200 - insulation structure layer; 300 - liquid cooling plate; 310 - groove; 400 - bottom guard plate; 410 - boss; 500 - sealing assembly; 510 - sealing gasket; 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; 700 - thermal insulation pad; 800 - adapter; 810 - first connecting portion; 820 - second connecting portion; 900 - limiter; X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0057] The following describes in detail embodiments of the present disclosure, examples of which 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 intended only to explain the present disclosure and are not to be construed as limiting the present disclosure.

[0058] In the description of the present disclosure, 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 disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the present disclosure, "plurality" means two or more, unless otherwise specifically defined.

[0060] In this disclosure, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0061] In the present disclosure, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it 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. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0062] As shown in Figures 1 and 13 , an embodiment provides a battery pack 1000 that can be used in electrical devices. These devices may include, but are not limited to, mobile phones, portable devices, laptop computers, electric vehicles, electric toys, power tools, electric vehicles, ships, and spacecraft. Battery pack 1000 is used to provide power to these devices.

[0063] In this embodiment, the battery pack 1000 includes a beam assembly 100, a liquid cooling plate 300, and a first connector 610. Furthermore, the battery pack 1000 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 of the battery pack 1000, the second direction Y may be parallel to the width of the battery pack 1000, and the third direction Z may be parallel to the height of the battery pack 1000.

[0064] The beam assembly 100 includes a box beam 120 extending along a second direction Y. The box beam 120 may be a hollow tubular structure having an installation space 1203 disposed therein. The liquid cooling plate 300 is connected to one side of the box beam 120 along a third direction Z. In an embodiment, a first connection hole 124 is formed on one end of the box beam 120 facing the liquid cooling plate 300 along the third direction Z. Furthermore, the box beam 120 has two opposing side plates 1204 disposed along a first direction X, and a first avoidance hole 122 is formed through at least one side plate 1204 along the first direction X. Both the first connection hole 124 and the first avoidance hole 122 are connected to the installation space 1203 of the box beam 120. Furthermore, the first connection hole 124 and the first avoidance hole 122 are disposed correspondingly. The first avoidance hole 122 is connected to the external environment of the box beam 120.

[0065] 3 and 7 , the first connector 610 has a first end 611. The first connector 610 sequentially passes through the liquid cooling plate 300 and the first connection hole 124, and is connected to the box beam 120, thereby connecting the liquid cooling plate 300 to the box beam 120. When the first connector 610 is assembled, the first avoidance hole 122 can provide a clearance for the first end 610.

[0066] In this embodiment, a projection of the first end 611 on a plane where the side plate 1204 on which the first avoidance hole 122 is provided is located is located inside the first avoidance hole 122 .

[0067] During assembly of the liquid cooling plate 300 and the beam assembly 100, due to structural tolerances, the first connector 610 may become skewed relative to the third direction Z. In the prior art, when the first connector 610 becomes skewed relative to the third direction Z, the first end 611 of the first connector 610 may abut against the side panel 1204 of the box beam 120, thereby hindering assembly of the first connector 610 and causing the first connector 610 to be improperly assembled. Furthermore, the side panel 1204 of the box beam 120 may be deformed and damaged by the squeezing action of the first connector 610.

[0068] In the present disclosure, 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 exterior of the box beam 120 through the first avoidance hole 122. In other words, the first avoidance hole 122 provides a clearance for the first end 611 of the first connector 610. This prevents the first end 611 of the first connector 610 from abutting against the box beam 120, thereby preventing the first connector 610 from being misassembled due to obstruction by the box beam 120. This further prevents the liquid cooling plate 300 and the beam assembly 100 from being misassembled and causing relative shaking. Furthermore, this prevents the box beam 120 from being deformed and damaged by being squeezed by the first end 611, thereby improving the assembly yield of the battery pack 1000.

[0069] 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, 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.

[0070] As shown in Figures 1, 3, 8, and 13, in the embodiment, the first end 611 of the first connector 610 extends along the third direction Z, away from the liquid cooling plate 300. The other end of the first connector 610, away from the first end 611, is the second end 612. Specifically, the first connector 610 includes a first connecting post 613 and a first flange 614. The first connecting post 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 post 613, near the second end 612.

[0071] The outer diameter of the first flange 614 is larger than the diameter of the first connection hole 124 and is positioned to abut the side of the liquid cooling plate 300 facing away from the box beam 120. The first connection post 613 is sequentially inserted 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. This secures the liquid cooling plate 300 to one side of the box beam 120.

[0072] 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.

[0073] As shown in Figures 1 and 13, the first connection hole 124 can penetrate the end of the box beam 120 facing 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 at the end facing the liquid cooling plate 300 along the third direction Z. In some embodiments, the first avoidance hole 122 is formed along the first direction X through both side plates 1204 of the box beam 120.

[0074] In 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 .

[0075] As shown in Figures 1, 6, 7, and 13, the box beam 120 may be provided with a plurality of first connection holes 124 spaced apart in sequence along the second direction Y. Furthermore, the box beam 120 may also be provided with a plurality of first avoidance holes 122 spaced apart in sequence along the second direction Y. The plurality of first avoidance holes 122 may correspond one-to-one with the plurality of first connection holes 124, and the first avoidance holes 122 and the corresponding first connection holes 124 may be connected through the installation space 1203. A plurality of first connectors 610 are provided, and the plurality of first connectors 610 are installed in a one-to-one correspondence with the first connection holes 124.

[0076] Furthermore, the first connecting member 610 is a screw.

[0077] 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.

[0078] As shown in Figures 1 and 13, in some embodiments, the first avoidance hole 122 can extend along the third direction Z, and is spaced apart at both ends of the box beam 120 opposite to the third direction Z. Specifically, there is a gap between the hole edge of the first avoidance hole 122 at the 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 the end facing away from the liquid cooling plate 300 and the top plate 1201 of the box beam 120 at the end facing 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 prevent the first avoidance hole 122 from extending a large length along the third direction Z and affecting the structural strength of the box beam 120, thereby ensuring the overall structural strength of the beam assembly 100.

[0079] As shown in Figures 1, 6 to 8, and 13, in some embodiments, the battery pack 1000 further includes a bottom guard plate 400 and a second connector 620. The bottom guard plate 400 is connected to a side of the liquid cooling plate 300 that faces away from the box beam 120.

[0080] Correspondingly, the box beam 120 is further provided with a second connection hole 125 extending along the third direction Z through the end of the box beam 120 facing the liquid cooling plate 300. In the second direction Y, the second connection hole 125 is spaced apart from the first connection hole 124. Furthermore, a second avoidance hole 123 is provided through at least one side plate 1204 of the box beam 120 along the first direction X. The second avoidance hole 123 is located on the side of the second connection hole 125 facing away from the bottom guard plate 400. Both the second connection hole 125 and the second avoidance hole 123 communicate with the installation space 1203 within the box beam 120. The second avoidance hole 123 is provided correspondingly to the second connection hole 125.

[0081] The second connector 620 is sequentially passed through the bottom guard plate 400, the liquid cooling plate 300, and the second connection hole 125, and connected to the box beam 120 to connect the bottom guard plate 400 to the box beam 120. The second avoidance hole 123 can avoid the second connector 620 when assembling.

[0082] Furthermore, the projection of the end of the second connecting member 620 facing away from the bottom guard plate 400 on the plane of the side plate 1204 having the second avoidance hole 123 is located within the second avoidance hole 123. In some specific embodiments, the second avoidance hole 123 is penetrated along the first direction X on both side plates 1204 of the box beam 120.

[0083] Thus, when the bottom guard plate 400 and the box beam 120 are connected via the second connector 620, the second avoidance hole 123 provides an escape for the end of the second connector 620 that is away from the bottom guard plate 400. When the second connector 620 tilts toward the side panel 1204, this prevents the end of the second connector 620 that is away from the bottom guard plate 400 from abutting against the box beam 120. This prevents the second connector 620 from being improperly assembled due to the obstruction of the box beam 120, prevents the bottom guard plate 400 from shaking relative to the beam assembly 100 due to improper assembly, and prevents the box beam 120 from being deformed and damaged by the compression of the second connector 620, thereby improving the assembly yield of the battery pack 1000.

[0084] Furthermore, the second avoidance hole 123 provided in the box beam 120 further reduces the material usage and material costs of the box beam 120. This further reduces the weight of the box beam 120, thereby reducing the overall weight of the battery pack 1000. This not only facilitates transportation but also reduces the weight of the electrical devices themselves, thereby reducing energy consumption.

[0085] In other embodiments, the second avoidance hole 123 is formed along the first direction X on only one side plate 1204 of the box beam 120 .

[0086] Referring to Figures 4 and 5 , the second connector 620 includes a rivet nut 621 and a rivet bolt 622. The rivet nut 621 is inserted through the second connection hole 125 and riveted to the bottom plate 1202 of the box beam 120. Specifically, the rivet nut 621 includes a second connection post 6211 and a third flange 6212, with the third flange 6212 located at one end of the second connection post 6211. During assembly, the second connection post 6211 is inserted through the second connection hole 125. The outer diameter of the third flange 6212 is larger than the diameter of the second connection hole 125, and the third flange 6212 abuts 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 base plate 1202 facing away from the liquid cooling plate 300. 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 base plate 1202 facing away from the liquid cooling plate 300.

[0087] 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 sequentially penetrates the bottom guard plate 400, the liquid cooling plate 300, and the rivet nut 621, and is threadedly engaged with the rivet nut 621. The second flange 6222 abuts the side of the bottom guard plate 400 facing away from the liquid cooling plate 300. This allows the bottom guard plate 400 to be installed and fixedly connected to the box beam 120.

[0088] It is understood 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 offset from the first connection holes 124. The plurality of second avoidance holes 123 may be sequentially spaced along the second direction Y and spaced and offset from the first avoidance holes 122. Furthermore, the plurality of second avoidance holes 123 may be provided in a one-to-one correspondence with the plurality of second connection holes 125.

[0089] In other embodiments, the second avoidance hole 123 may have a certain extension length in the second direction Y. Accordingly, one second avoidance hole 123 may also correspond to a plurality of second connection holes 125 at the same time.

[0090] As shown in Figures 1 and 13, in some embodiments, the second avoidance hole 123 can extend along the third direction Z and be spaced apart at both ends of the box beam 120 opposite to the third direction Z. Specifically, a gap exists between the edge of the second avoidance hole 123 at the end facing the liquid cooling plate 300 and the bottom plate 1202 of the box beam 120 at the end facing the liquid cooling plate 300. Simultaneously, a gap also exists between the edge of the second avoidance hole 123 at the end facing away from the liquid cooling plate 300 and the top plate 1201 of the box beam 120 at the end facing away from the liquid cooling plate 300. Thus, while providing a buffer for the second connector 620 and reducing the weight of the box beam 120, the second avoidance hole 123 can be prevented from extending too far along the third direction Z and affecting the structural strength of the box beam 120. This ensures the structural strength of the box beam 120, and thereby the overall structural strength of the beam assembly 100.

[0091] As shown in Figures 1, 2, 6, 9, 10 and 13, in the third direction Z, a groove 310 is provided on the liquid cooling plate 300 at a position corresponding to the second connection hole 125, and a boss 410 is provided on the bottom guard plate 400 at a position corresponding to the second connection hole 125, facing one end of the liquid cooling plate 300. In the embodiment, the boss 410 is inserted into the corresponding groove 310, and the surface of the boss 410 can fit with the inner wall of the groove 310. On the one hand, the bottom guard plate 400 and the liquid cooling plate 300 can be pre-positioned, making it easier to connect the bottom guard plate 400 to the box frame 110 via the second connector 620. On the other hand, the assembly of the battery pack 1000 can be made tighter, thereby improving the stability of the assembly.

[0092] Furthermore, the box beam 120 also has a top plate and a bottom plate spaced apart in the third direction. These plates are positioned between and connected to the two side plates 1204. In other words, the box beam 120 is a square tube. The top plate, bottom plate, and two side plates 1204 enclose an installation space 1203. Both the first connection hole 124 and the second connection hole 125 are provided in the bottom plate. The liquid cooling plate 300 is located on one side of the bottom plate.

[0093] Furthermore, the first connection hole 124 and the first avoidance hole 122 are provided at the same length position of the box beam 120 in the second direction Y. The second connection hole 125 and the second avoidance hole 123 are provided at the same length position of the box beam 120 in the second direction Y.

[0094] As shown in FIG1 , the beam assembly 100 further includes a box frame 110. The box frame 110 is generally annular and defines a receiving cavity 112. A box beam 120 is positioned within the receiving cavity 112 and connected to the box frame 110. Specifically, the ends of the box beam 120 are connected to opposite inner walls of the box frame 110.

[0095] 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.

[0096] 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, thereby facilitating the machining of the first avoidance hole 122 and the second avoidance hole 123 on the box beam 120, reducing machining difficulty and improving machining efficiency.

[0097] 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.

[0098] In some embodiments, both ends of the box beam 120 are connected to the box frame 110 via an adapter 800. The adapter 800 is generally T-shaped. Specifically, the adapter 800 may include an integral first connecting portion 810 and a second connecting portion 820. The first connecting 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 connecting portion 820 protrudes from the side of the first connecting portion 810 facing the accommodating cavity 112.

[0099] In addition, an abutment flange 111 is protruding from the inner wall of the box frame 110 facing the accommodating cavity 112, and the abutment 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. The end of the box beam 120 facing the box frame 110 is an open structure. In an 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 abutment flange 111 and abut against the end of the abutment flange 111 facing the second connecting portion 820. In an embodiment, the box beam 120 and the second connecting portion 820 can be further fixed by welding or screw connection.

[0100] As shown in Figures 1, 5 to 7, and 12, in some embodiments, the box frame 110 may be enclosed by a hollow tubular structure, i.e., 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. Both the first connection hole 124 and the second connection hole 125 extend through the end of the box frame 110 facing the liquid cooling plate 300 along the third direction Z. Furthermore, the first connection hole 124 and the second connection hole 125 may be spaced apart in the box frame 110.

[0101] Correspondingly, a first connector 610 can be configured at the position of the first connection hole 124, and a second connector 620 can be configured at the position of the second connection hole 125. The first connector 610 is inserted 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 connector 620, a rivet nut 621 is inserted through the second connection hole 125 and riveted to the box frame 110. The screw portion 6221 of the rivet bolt 622 is sequentially inserted 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. The second flange 6222 abuts the side of the bottom guard plate 400 facing away from the box frame 110, thereby achieving connection between the box frame 110 and the bottom guard plate 400. In this way, the connection between the edge of the liquid cooling plate 300 and the beam assembly 100 and 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.

[0102] As shown in Figures 1, 6, and 10, the battery pack 1000 further includes a sealing assembly 500 and a retaining member 900. Both the sealing assembly 500 and the retaining member 900 are located between the beam assembly 100 and the liquid cooling plate 300. The sealing assembly 500 is located on the side of the retaining member 900 facing the accommodating cavity 112. In some embodiments, the retaining member 900 may be disposed along the entire perimeter of the box frame 110, forming a ring-shaped structure.

[0103] Of course, in other embodiments, a plurality of limiting members 900 may be spaced apart along the circumference of the box frame 110 and distributed evenly or unevenly.

[0104] When the liquid cooling plate 300 and the cabinet frame 110 are connected via the first connector 610, the sealing assembly 500 can be compressed in the third direction Z. The stopper 900 can limit the amount of compression of the sealing assembly 500 in the third direction Z, preventing the sealing assembly 500 from being damaged or ineffective due to excessive compression. Accordingly, when the sealing assembly 500 is not compressed, the end of the sealing assembly 500 facing the liquid cooling plate 300 can protrude relative to the end of the stopper 900 facing the liquid cooling plate 300.

[0105] In conjunction 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 disposed along the circumferential edge of the sealing gasket 510. Furthermore, the sealing rubber ring 520 may be located at the end of the sealing gasket 510 facing the box frame 110. In this embodiment, by disposing the sealing rubber ring 520 at the end of the sealing gasket 510 facing the box frame 110, the sealing performance of the connection between the sealing assembly 500 and the box frame 110 can be improved.

[0106] In some embodiments, the battery pack 1000 further includes an insulating structural layer 200 and a thermal pad 700. The insulating structural layer 200 is disposed between the liquid cooling plate 300 and the sealing assembly 500. In some embodiments, the insulating structural layer 200 can be used to provide insulation protection. The thermal pad 700 can be disposed between the liquid cooling plate 300 and the bottom guard plate 400 to provide thermal insulation protection for the liquid cooling plate 300 and reduce cooling loss within the liquid cooling plate 300.

[0107] 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.

[0108] In addition, an embodiment further provides an electric device 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, electric vehicles, electric toys, electric tools, electric vehicles, ships, and spacecraft.

[0109] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 disclosure. 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 different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0110] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure. Industrial Applicability

[0111] In summary, the present disclosure provides a battery pack and an electrical device which, by providing a first avoidance hole, can avoid the first connector during assembly, thereby avoiding the problem of the first connector not being properly assembled and reducing the difficulty of assembly.

Claims

1. A battery pack, wherein: It comprises a beam 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) that are perpendicular to each other; The beam assembly (100) includes a box beam (120) extending along a second direction (Y), an installation space (1203) is provided in the box beam (120), the liquid cooling plate (300) is connected to one side of the box beam (120) along the third direction (Z), a first connection hole (124) is provided on one end of the box beam (120) facing the liquid cooling plate (300) along the third direction (Z), 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), and both the first avoidance hole (122) and the first connection hole (124) are in communication with 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, wherein: The first connecting member (610) includes 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 the inner wall of the first connecting hole (124).

3. The battery pack according to claim 1, wherein: 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, wherein: In the second direction (Y), the box beam (120) is provided with a plurality of first connection holes (124) and a plurality of first avoidance holes (122) arranged at intervals, and one first avoidance hole (122) is provided corresponding to at least one first connection hole (124); The first connecting members (610) include a plurality of first connecting members (610), and the plurality of first connecting members (610) are installed in a one-to-one correspondence in the first connecting holes (124).

5. The battery pack according to any one of claims 1 to 4, characterized in that: The battery pack further includes a bottom guard plate (400), the bottom guard plate (400) being connected to a side of the liquid cooling plate (300) facing away from the box beam (120); The box beam (120) is further provided with a second connection hole (125) at one end thereof 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), and a second avoidance hole (123) being provided through at least one of the side plates (1204) along the first direction (X), the second avoidance hole (123) being spaced apart from the first avoidance hole (122), the second avoidance hole (123) and the second connection hole (125) both being in communication with the installation space (1203); the second avoidance hole (123) and the second connection hole (125) being correspondingly provided; The battery pack further includes a second connecting member (620), the second connecting member (620) being sequentially passed through the bottom guard plate (400), the liquid cooling plate (300), and the second connecting hole (125), and being connected to the box beam (120), so as to connect the bottom guard plate (400) to the box beam (120); The projection of the end of the second connecting member (620) facing 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).

6. The battery pack according to claim 5, characterized in that: The second connecting member (620) includes a rivet nut (621) and a rivet bolt (622) connected in sequence along the third direction (Z), the rivet nut (621) being 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 screwed to the rivet nut (621); the second flange (6222) abuts against the side of the bottom guard plate (400) facing away from the liquid cooling plate (300).

7. The battery pack according to claim 5, characterized in that: The box beam (120) is a hollow tubular structure.

8. The battery pack according to claim 5, characterized in that: The box beam (120) further comprises a top plate and a bottom plate spaced apart in the third direction, wherein the top plate and the bottom plate are disposed between the two side plates (1204) and are both connected to the two side plates (1204); The top plate, the bottom plate and the two side plates (1204) enclose and form the installation space (1203); The first connection hole (124) and the second connection hole (125) are both arranged on the bottom plate, and the liquid cooling plate (300) is arranged on one side of the bottom plate.

9. The battery pack according to claim 5, characterized in that: The first connection hole (124) and the first avoidance hole (122) are arranged at the same length position of the box beam (120) in the second direction (Y); The second connection hole (125) and the second avoidance hole (123) are arranged at the same length position of the box beam (120) in the second direction (Y).

10. 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 connection 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), the boss (410) is inserted into the groove (310), and the boss (410) is in contact with the inner wall of the groove (310).

11. The battery pack according to claim 5, characterized in that: The beam frame assembly (100) further includes a box frame (110), wherein the box frame (110) is surrounded 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).

12. The battery pack according to claim 11, wherein: 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 passed through 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).

13. The battery pack according to claim 11, wherein: The battery pack further includes a limiting member (900) and a sealing assembly (500), wherein the limiting member (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 limiting member (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 limiting member (900) limits the compression amount of the sealing assembly (500) in the third direction (Z).

14. The battery pack according to claim 11, wherein: The battery pack further includes an adapter (800), and both ends of the box beam (120) are respectively connected to the box frame (110) through the adapter (800).

15. The battery pack according to any one of claims 1 to 4, characterized in that: The first connecting member (610) is a screw.

16. An electrical device, characterized in that: Comprising the battery pack as claimed in claim 15.

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