Battery pack and vehicle having same

Abstract

The battery pack (100) and a vehicle (1000) having the same include the battery pack (100), which includes cells (2), a bottom plate (1) provided below the cells (2) to support the cells (2), a top plate (3) provided above the cells (2), a beam main body portion (41) located between the bottom plate (1) and the top plate (3), and an attachment beam (4) including a beam bottom portion (42) connected to the lower end of the beam main body portion (41) and supported below the bottom plate (1), and a connection assembly (5) that attaches the battery pack (100) to an attachment point in an application scene and is engaged with the attachment beam (4) to provide an upward acting force to the attachment beam (4) when the battery pack (100) is attached to the attachment point in the application scene.

Description

[Technical field]

[0001] (CROSS REFERENCE TO RELATED APPLICATIONS) This application claims priority to Chinese Patent Application No. “202011194507.7” filed on October 30, 2020 by BYD Company Limited and entitled “Battery Pack and Vehicle Having the Same.”

[0002] The present application relates to the technical field of battery packs, and more particularly to a battery pack and a vehicle having the same. [Background technology]

[0003] The battery pack in the related technology is fixed to the vehicle body by a connection device and includes a mounting beam and a bottom plate. The mounting beam is connected above the bottom plate and is also connected to the connection device, and the cells are supported on the bottom plate. In this case, the cells apply a downward force to the bottom plate, but since the mounting beam located above the bottom plate receives an upward force from the connection device, and the bottom plate receives a downward force from the cells, it is easy for problems to occur such as poor connection between the mounting beam and the bottom plate. Summary of the Invention [Problem to be solved by the invention]

[0004] The present application seeks to solve at least one of the technical problems in the prior art, and provides a battery pack that can solve the problem of the attachment beam and the bottom plate being separated. [Means for solving the problem]

[0005] The present application further provides a vehicle having the above battery pack.

[0006] A battery pack according to an embodiment of the first aspect of the present application includes a cell, a bottom plate provided below the cell to support the cell, a top plate provided above the cell, a beam main body portion located between the bottom plate and the top plate, and an attachment beam including a beam bottom portion connected to a lower end of the beam main body portion and disposed below the bottom plate, and a connection assembly that attaches the battery pack to an attachment point in an application scene and is engaged with the attachment beam to provide an upward acting force to the attachment beam when the battery pack is attached to the attachment point in the application scene.

[0007] In the battery pack of the embodiment of the present application, the mounting beam is not located completely above the bottom plate, but includes a beam bottom located below the bottom plate, and the point of application at which the mounting beam applies force to the bottom plate is not located above the bottom plate, but below the bottom plate. Therefore, the bottom plate is not separated from the mounting beam due to the gravitational action of the cell, but is tightly connected to the mounting beam, further improving the reliability and effectiveness of the support of the bottom plate by the mounting beam, and improving the robustness and stability of the engagement between the mounting beam and the bottom plate.

[0008] In some examples herein, the connection assemblies are multiple and spaced apart along the length of the mounting beam.

[0009] In some examples of the present application, the connection assembly includes a sleeve including a sleeve portion inserted into the mounting beam along an upward and downward direction and a bottom edge portion connected to a lower end of the sleeve portion and supported below the bottom of the beam.

[0010] In some examples herein, the connection assembly further includes a connection member having a boss within the sleeve, the connection member including a head portion and a rod portion, the head portion connected to a lower end of the rod portion and supported below the boss, the rod portion passing through the sleeve and the top plate and having an upper end located above the top plate.

[0011] In some examples of the present application, the connection assembly further includes a first sealing member, the sleeve includes a connection portion connected to an upper end of the sleeve portion and penetrating the top plate, an outer diameter of the sleeve portion is larger than an outer diameter of the connection portion, and the first sealing member is fitted to the outside of the connection portion and interposed between the sleeve portion and the top plate.

[0012] In some examples of the present application, the connection assembly further includes a nut having male threads on an outer peripheral surface of at least a portion of the connection portion located above the top plate, the nut being located above the top plate and threaded onto the outside of the connection portion.

[0013] In some examples herein, the connection assembly further includes a second sealing member located on top of the nut and surrounding the inner bore of the nut.

[0014] In some examples of the present application, the nut has a shielding portion at the top, the shielding portion being annular and positioned above the connecting portion to shield the portion where the connecting portion and the nut are threaded together.

[0015] In some examples herein, the connection assembly further includes a third sealing member fitted onto the outside of the rod portion and interposed between the head portion and the boss.

[0016] In some examples herein, the beam bottom includes a central portion and an outer periphery, the outer periphery is disposed around the central portion, the thickness of the central portion is greater than the thickness of the outer periphery, and the bottom edge is supported below the central portion.

[0017] In some examples herein, the beam bottom further includes a transition portion that is connected between the central portion and the outer periphery and has a thickness that gradually decreases in a direction from the central portion to the outer periphery, and the central portion has a top surface that is flush with a top surface of the outer periphery and a bottom surface that smoothly transitions through a bottom surface of the transition portion and is connected to a bottom surface of the outer periphery.

[0018] In some examples of the present application, a countersunk groove is provided in the top wall of the outer edge of the bottom of the beam, the outer surface of the countersunk groove is open, and the bottom plate is fixed by abutting against the inner wall of the countersunk groove.

[0019] In some examples of the present application, the cells are provided on both sides of the mounting beam in the width direction.

[0020] In some examples herein, the battery pack includes a plurality of side beams surrounding the bottom plate, the plurality of side beams and the bottom plate being connected to form a tray, the plurality of side beams surrounding a frame, and both the cells and the mounting beams being disposed within the frame.

[0021] In some examples herein, the cells are bonded to the base plate.

[0022] In some examples herein, the top plate is a cold plate and is bonded to the cell.

[0023] In some examples of the present application, the mounting beam is a hollow beam having reinforcing ribs formed therein, the reinforcing ribs extending along the length of the mounting beam, being multiple and spaced apart along the vertical direction within the beam main body.

[0024] In some examples of the present application, a countersunk groove is provided in the top wall of the outer edge of the bottom of the beam, the outer surface of the countersunk groove is open, and the bottom plate is fixed by abutting against the inner wall of the countersunk groove.

[0025] In some examples of the present application, the mounting beam further includes a beam top portion connected to the upper end of the beam main body portion and supported below the top plate, and the sleeve portion extends in the vertical direction, is inserted into the mounting beam, and has its upper end supported below the beam top portion.

[0026] A vehicle according to an embodiment of the second aspect of the present application includes a vehicle body and a battery pack according to an embodiment of the first aspect of the present application, and the connection assembly is connected to the vehicle body. Effect of the Invention

[0027] The vehicle according to the present application is provided with the battery pack according to the embodiment of the first aspect, thereby improving the overall performance of the vehicle.

[0028] Additional aspects and advantages of the present application will be set forth in part in the description that follows, and in part will be obvious from the description, or may be learned by practice of the present application. [Brief description of the drawings]

[0029] [Figure 1] 1 is a cross-sectional view of a battery pack according to an embodiment of the present application. [Diagram 2] FIG. 2 is an enlarged view of F1 shown in FIG. [Diagram 3] FIG. 2 is a cross-sectional view of the tray shown in FIG. [Figure 4] FIG. 4 is an enlarged view of F2 shown in FIG. [Diagram 5] FIG. 2 is a cross-sectional view of a battery pack according to another embodiment of the present application. [Figure 6] FIG. 6 is an enlarged view of F3 shown in FIG. 5. [Figure 7] FIG. 2 is a cross-sectional view of a battery pack according to another embodiment of the present application. [Figure 8] FIG. 8 is an enlarged view of F4 shown in FIG. [Figure 9] FIG. 2 is a cross-sectional view of a battery pack according to another embodiment of the present application. [Figure 10] FIG. 10 is an enlarged view of F5 shown in FIG. [Figure 11] FIG. 10 is an enlarged view of F6 shown in FIG. [Figure 12] FIG. 2 is an exploded view of a battery pack according to an embodiment of the present application. [Figure 13] FIG. 13 is an assembly diagram of the battery pack shown in FIG. [Figure 14] 1 is a schematic diagram of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Hereinafter, the embodiments of the present application will be described in detail, and examples of the embodiments are shown in the drawings, and the same or similar reference numerals throughout indicate the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the drawings are merely illustrative and are intended to interpret the present application, but should not be understood as limiting the present application.

[0031] The following disclosure provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the following describes specific example components and installations. It should be understood that these are merely exemplary and are not intended to limit the present application. The present application may also repeat reference numerals and / or alphabetical references in different examples. Such repetition is for the purpose of brevity and clarity, and does not in itself indicate a relationship between the various embodiments and / or installations discussed. The present application also provides examples of various specific processes and materials, but one skilled in the art may be aware of the applicability of other processes and / or the use of other materials.

[0032] Hereinafter, a battery pack 100 according to an embodiment of a first aspect of the present application will be described with reference to the drawings.

[0033] As shown in FIG. 1, the battery pack 100 includes a bottom plate 1, a cell 2, and a top plate 3. As shown in FIG. 2, the cell 2 is provided above the bottom plate 1, and the top plate 3 is provided above the cell 2. That is, the top plate 3 is located above the bottom plate 1, and the cell 2 is located between the top of the bottom plate 1 and the bottom of the top plate 3. The bottom plate 1 is provided below the cell 2 so as to support the cell 2. Note that the "up" and "down" directional nouns described in this specification are based on the case where the battery pack 100 is attached to an application scene. For example, when the battery pack 100 is attached to the body 200 of the vehicle 1000, the up-down direction refers to the up-down direction of the vehicle 1000, that is, the top of the vehicle 1000 is "up" and the bottom of the vehicle 1000 is "down".

[0034] 2 and 3, the battery pack 100 further includes an attachment beam 4 including a beam main body portion 41 located between the bottom plate 1 and the top plate 3, and a beam bottom portion 42 connected to a lower end of the beam main body portion 41 and supported below the bottom plate 1. Note that the beam bottom portion 42 being supported below the bottom plate 1 means that the beam bottom portion 42 is located below the bottom plate 1 and directly or indirectly supports the bottom plate 1. Note that in the description of the present application, when one "supports" the other, the one and the other may or may not be in contact with each other, and the one and the other may or may not have a fixed connection relationship.

[0035] 1 and 2, the battery pack 100 further includes a connection assembly 5 that attaches the battery pack 100 to an attachment point in an application scene, that is, by providing the connection assembly 5, the battery pack 100 is connected to an attachment position in an application scene, for example, when the battery pack 100 is applied to a vehicle 1000, the connection assembly 5 may be connected to a body 200 of the vehicle 1000, in which case the attachment point is located on the body 200. However, the application scene of the battery pack 100 is not limited to the vehicle 1000, and may be, for example, an application scene of a drone, an energy storage device, etc.

[0036] As shown in FIG. 1 and FIG. 2, the connection assembly 5 is fitted with the mounting beam 4 to provide an upward acting force to the mounting beam 4 when the battery pack 100 is attached to a mounting point in an application scene. The specific manner of fitting the connection assembly 5 and the mounting beam 4 is not limited, and any manner that satisfies the above-mentioned function of "providing an upward acting force to the mounting beam 4 when the battery pack 100 is attached to a mounting point in an application scene" may be used. For example, the connection assembly 5 may be engaged, inserted, abutted, tightly fitted, screwed, welded, or fixedly connected to the mounting beam 4 by a connecting member, and the description thereof is omitted here. In addition, the relative positions of the connection assembly 5 and the mounting beam 4, the bottom plate 1, and the top plate 3 are not limited, and for example, the connection assembly 5 may be located between the bottom plate 1 and the top plate 3, may penetrate the bottom plate 1 downward, or may penetrate the top plate 3 upward, and the description thereof is omitted here.

[0037] Specifically, by providing the connection assembly 5, the battery pack 100 can be connected to an application scene to realize installation of the battery pack 100 or improve the installation stability of the battery pack 100. For example, in some embodiments of the present application, when the battery pack 100 is installed in the vehicle 1000, the connection assembly 5 may be connected to the chassis of the vehicle body 200. In this case, when the battery pack 100 is also connected to the vehicle body 200 by another installation structure, by providing the connection assembly 5, the installation stability of the battery pack 100 can be improved. When the battery pack 100 is not connected to the vehicle body 200 by another installation structure, by providing the connection assembly 5, the battery pack 100 can be installed in a suspended manner.

[0038] As a result, in the battery pack 100 of the embodiment of the present application, the mounting beam 4 includes a beam bottom 42 supported below the bottom plate 1, so that the bottom plate 1 is located above the beam bottom 42. In this way, when the connection assembly 5 is connected to an installation point (e.g., a vehicle body) in an installation scene, the connection assembly 5 provides an upward acting force to the mounting beam 4 due to the action of the gravity of the cells 2 and other components of the battery pack 100, etc. In this case, the mounting beam 4 provides a supporting force to the bottom plate 1 located above it through the beam bottom 42, thereby improving the reliability of the support of the bottom plate 1 by the mounting beam 4, improving the robustness and stability of the engagement between the mounting beam 4 and the bottom plate 1, and avoiding separation of the mounting beam 4 and the bottom plate 1.

[0039] In some embodiments of the present application, the cell 2 is adhered to the bottom plate 1, for example, by a structural adhesive 7 shown in FIG. 2. In this way, when the cell 2 exerts a downward force, such as gravity, on the bottom plate 1, the cell 2 presses the bottom plate 1 and the mounting beam 4 together, thereby ensuring the reliability of the fit between the mounting beam 4 and the bottom plate 1. In addition, the adhesion between the cell 2 and the bottom plate 1 allows the bottom plate 1 to reliably support the cell 2.

[0040] In some embodiments of the present application, the top plate 3 is a cooling plate, and is bonded to the cells 2, for example, by a thermally conductive adhesive 8 as shown in Fig. 2. This allows the top plate 3 to regulate the temperature of the cells 2 to ensure reliable operation of the battery pack 100. This allows the mounting beams 4 to provide an upward force to the bottom plate 1, which can effectively prevent the cells 2 from being separated downward from the top plate 3, resulting in the problem of adhesion failure.

[0041] The inventor found that some battery packs in the related art do not have mounting beams, and the connection device connected to the vehicle body is directly fixed to the top plate, and the cell transmits the downward force to the top plate under the action of the cell's own weight, and in this case, the connection device provides an upward force to the top plate, which causes the adhesive failure between the top plate and the cell, and the cell falls off from the top plate. In order to solve this technical problem, some other battery packs in the related art are provided with mounting beams, but the mounting beams are all located above the bottom plate and fixedly connected to the bottom plate by welding or adhesive, and in this case, the cell applies a downward force to the bottom plate, and the mounting beams located above the bottom plate receive the upward force from the connection device, and the bottom plate receives the downward force from the cell, which is likely to cause the problem of connection failure between the mounting beams and the bottom plate.

[0042] In the battery pack 100 of the embodiment of the present application, the mounting beam 4 is not located completely above the bottom plate 1, but includes a beam bottom portion 42 located below the bottom plate 1, and the point of action at which the mounting beam 4 applies force to the bottom plate 1 is not located above the bottom plate 1, but below the bottom plate 1. Therefore, the bottom plate 1 is not separated from the mounting beam 4 due to the downward action of the gravity of the cell 2, etc., but is tightly connected to the mounting beam 4, further improving the reliability and effectiveness of the support of the bottom plate 1 by the mounting beam 4, and improving the robustness and stability of the engagement between the mounting beam 4 and the bottom plate 1.

[0043] 2, in some embodiments of the present application, the connection assembly 5 includes a sleeve 51 including a sleeve portion 511 inserted into the mounting beam 4 along the vertical direction, and a bottom edge portion 512 connected to the lower end of the sleeve portion 511 and supported below the beam bottom portion 42. Note that the bottom edge portion 512 being supported below the beam bottom portion 42 means that the bottom edge portion 512 is located below the beam bottom portion 42 and directly or indirectly supports the mounting beam 4.

[0044] This allows the connection assembly 5 to easily and effectively realize engagement with the mounting beam 4 and provide an upward acting force to the mounting beam 4. In addition, the sleeve 51 includes a bottom edge 512 supported below the mounting beam 4, which improves the reliability of the connection assembly 5 providing an upward acting force to the mounting beam 4, and avoids the problem of the connection assembly 5 moving upward relative to the mounting beam 4 and separating from the mounting beam 4, thereby improving the operational reliability and effectiveness of the connection assembly 5.

[0045] In this embodiment, the relative positional relationship between the sleeve 51 and the top plate 3 is not limited, and for example, the upper end of the sleeve 51 may be located below the top plate 3, or for example, the upper end of the sleeve 51 may be inserted into the top plate 3 and located above the top plate 3. In some embodiments of the present application, the sleeve 51 may be directly connected to an attachment point in the application scene to attach the battery pack 100 to the attachment point in the application scene, and for example, the sleeve 51 may be connected to the attachment point in the application scene by a method such as interference fit, screwing, welding, or fixed connection by a connecting member, and in this case, the connecting member 52 described below may be omitted.

[0046] 2, the sleeve 51 has a boss 513 therein, and the connection assembly 5 further includes a connection member 52 including a head portion 521 and a rod portion 522, the head portion 521 being connected to a lower end of the rod portion 522 and supported below the boss 513, the rod portion 522 penetrating the sleeve 51 and the top plate 3, and an upper end of the rod portion 522 being located above the top plate 3, that is, the rod portion 522 penetrating upward through the sleeve 51 and the top plate 3. In this way, the upper end of the rod portion 522 is connected to a mounting point such as a vehicle body, thereby easily and effectively realizing the connection between the connection assembly 5 and the mounting point in the application scene, and the connection assembly 5 provides an upward acting force to the mounting beam 4.

[0047] The connecting member 52 is not limited to a specific type, and may be, for example, a bolt, a rivet, a pin, or the like. The specific structure of the boss 513 is not limited. For example, in the example shown in FIG. 6, a two-stage hole may be formed in the sleeve 51, the two-stage hole including an upper hole and a lower hole, the diameter of the upper hole is smaller than the diameter of the lower hole, and a step surface formed between the lower end of the upper hole and the upper end of the lower hole constitutes the lower surface of the boss 513. In another example (not shown in the drawings), an annular boss may be formed in the sleeve 51, and an upper hole located above the annular boss, a lower hole located below the annular boss, and an annular hole defined by the inner ring of the annular boss are formed in the sleeve 51, the hole diameters of the upper hole and the lower hole are both larger than the hole diameter of the annular hole, and the lower end surface of the annular boss constitutes the lower surface of the boss 513.

[0048] For example, in the example shown in FIG. 2 , when the upper end of the rod portion 522 is connected to the vehicle body, a downward acting force such as the gravity of the battery pack 100 itself causes the head portion 521 to provide an upward acting force to the sleeve 51 via the boss 513, and the sleeve 51 transmits the upward acting force to the beam bottom portion 42 of the mounting beam 4 via the bottom edge portion 512, and the mounting beam 4 transmits the upward acting force to the bottom plate 1 via the beam bottom 42, so that the bottom plate 1 supports the cell 2, and thus the gravity of the cell 2 and the upward acting force provided from the mounting beam 4 to the bottom plate 1 are applied to the bottom plate 1. The force in the direction of the arrow crimps the connection points between the bottom plate 1 and the mounting beam 4, and the force of the sleeve 51 on the battery pack 100 is from below to above, and this force is provided from the bottom of the battery pack 100 rather than an upward lifting force provided to the battery pack 100 from above the battery pack 100. Since the top plate 3 is not subjected to an upward lifting force, the occurrence of a problem in which stress is concentrated in localized areas of the adhesive between the top plate 3 and the cell 2, causing separation of the top plate 3 and the cell 2, is avoided.

[0049] The connecting member 52 mainly connects the battery pack 100 to an attachment point in an application scene, for example, to the chassis of a vehicle body, thereby realizing a connection and fixing between the battery pack 100 and the vehicle. The connecting member 52 does not need to have any other connection relationship with other components of the battery pack 100 other than being inserted into the sleeve 51. The battery pack 100 does not need to be equipped with the connecting member 52 when shipped alone. The presence or absence of the connecting member 52 does not affect the sealing of the battery pack 100, thereby improving the sealing property and reliability of the battery pack 100.

[0050] 1, the connection assemblies 5 may be multiple and spaced apart along the length of the mounting beam 4. This can improve the operational reliability of the connection assemblies 5 by distributing stress and reducing the forces experienced by each connection member 5.

[0051] For example, in the specific example shown in FIG. 3 , the mounting beam 4 may have a plurality of mounting holes 40 spaced apart along its length, each of which penetrates the mounting beam 4 along the vertical direction, and each of the mounting holes 40 is fitted with one connection assembly 5, thereby ensuring that the multiple connection assemblies 5 can be easily and effectively assembled and that the position of each connection assembly 5 is reliable and effective, that is, the positioning and restriction using the mounting holes 40 can improve the assembly efficiency and operational reliability of the connection assemblies 5.

[0052] In some embodiments of the present application, as shown in Figures 3 and 4, the mounting beam 4 can be set as a hollow beam in order to reduce the weight, and a reinforcing rib 44 or the like can be provided inside the hollow beam, so that not only can the weight be reduced but also the structural reliability of the mounting beam 4 can be ensured. For example, in the example shown in Figures 3 and 4, the reinforcing rib 44 extends along the length of the mounting beam 4, and may be multiple, and may be arranged at intervals within the beam body 41 along the vertical direction.

[0053] 2 and 4, in some embodiments of the present application, the beam bottom 42 includes a central portion 421 and an outer peripheral portion 422, the outer peripheral portion 422 is arranged to surround the central portion 421, the thickness of the central portion 421 is greater than the thickness of the outer peripheral portion 422, and the bottom edge portion 512 is supported below the central portion 421. This can meet the requirement of reducing the weight of the mounting beam 4, while improving the structural strength and rigidity of the main force-bearing position of the mounting beam 4, and avoiding the problem of the mounting beam 4 being deformed under the force.

[0054] In some embodiments of the present application, as shown in Figures 2 and 4, the beam bottom portion 42 further includes a transition portion 423, which is connected between the central portion 421 and the outer periphery 422, and the thickness gradually decreases in the direction from the central portion 421 to the outer periphery 422, and the central portion 421 has a top surface that is flush with the top surface of the outer periphery 422 and a bottom surface that smoothly transitions through the bottom surface of the transition portion 423 and is connected to the bottom surface of the outer periphery 422.

[0055] This ensures that the upper surface of the beam bottom 42 is substantially flat, thereby ensuring that the multiple cells 2 above it are arranged side by side at the same height, while also ensuring the structural reliability of the beam bottom 42 by avoiding problems such as a sudden change in the cross section of the beam bottom 42 causing the sudden change to break due to stress concentration.

[0056] In some embodiments of the present application, as shown in Fig. 4, the top wall of the outer edge of the beam bottom 42 has a countersunk groove 424, and the outer surface of the countersunk groove 424 is open, that is, the countersunk groove 424 is formed concavely downward and the surface away from the center of the beam bottom 42 is open, and the bottom plate 1 is fixed by abutting against the inner wall of the countersunk groove 424. Note that the bottom plate 1 abutting against the inner wall of the countersunk groove 424 means that a local part of the bottom plate 1 abuts against the inner wall of the countersunk groove 424. The bottom plate 1 being fixed to the inner wall of the countersunk groove 424 means that the bottom plate 1 and the inner wall of the countersunk groove 424 have a fixed connection relationship such as welding.

[0057] Thus, the outer edge of the beam bottom 42 is provided with a countersunk groove 424 that abuts against the bottom plate 1, which is helpful for welding the bottom plate 1 and the beam bottom 42, and can be, for example, friction stir welding, which ensures that the welding effect does not adversely affect the battery pack 100, for example, that no exposed welding seam is generated on the outer edge of the beam bottom 42, and can achieve the effect of assembly and positioning by using the countersunk groove 424, that is, the beam bottom 42 and the bottom plate 1 can be quickly fitted in an accurate position by using the countersunk groove 424 before welding. Of course, the present application is not limited thereto, and in other embodiments of the present application, the beam bottom 42 does not need to be provided with the countersunk groove 424, and in this case, the bottom plate 1 and the beam bottom 42 can be connected in other ways, and the description is omitted here.

[0058] 1 and 3, in some embodiments of the present application, a cell 2 is provided on each side of the mounting beam 4 in the width direction (the F2 direction in FIG. 1 is the width direction of the mounting beam 4), that is, at least one cell 2 is provided on one side of the mounting beam 4 in the width direction, and at least one cell 2 is provided on the other side of the mounting beam 4 in the width direction. As can be seen from this, the mounting beam 4 is not located at the side edge position of the battery pack 100, so that the connection stability between the non-side edge position of the battery pack 100 and the mounting point in the application scene can be guaranteed, and the problem that the non-side edge position of the battery pack 100 vibrates relative to the mounting point in the application scene can be improved.

[0059] The number of mounting beams 4 is not limited and may be one or more. When there is one mounting beam 4, the number of cells 2 on both sides of the width of the mounting beam 4 may be equal or unequal. When there are multiple mounting beams 4, a cell 2 is provided on each side of the lateral direction of each mounting beam 4, so that there are also cells 2 between two adjacent mounting beams 4.

[0060] In some embodiments of the present application, as shown in Figures 1 and 3, the battery pack 100 includes a plurality of side beams 6 surrounding the bottom plate 1, and the plurality of side beams 6 and the bottom plate 1 are connected to form a tray 101, and the frame is surrounded by the plurality of side beams 6, that is, the battery pack 100 includes a tray 101, and the tray 101 includes a bottom plate 1 and a plurality of side beams 6 located on the periphery of the bottom plate 1, and the frame is surrounded by the plurality of side beams 6, and the frame is surrounding the bottom plate 1, and both the cells 2 and the mounting beams 4 are provided within the frame. As can be seen from this, the mounting beams 4 are not located at the side edge positions of the battery pack 100, so that the connection stability between the non-side edge positions of the battery pack 100 and the mounting points in the application scene can be guaranteed, and the problem that the non-side edge positions of the battery pack 100 vibrate relative to the mounting points in the application scene can be improved.

[0061] For example, in one specific example, the side beams 6 may be four, and a rectangular frame may be surrounded by the four side beams 6, the bottom plate 1 is located at the bottom of the rectangular frame, and the mounting beam 4 is at least one and is located within the rectangular frame defined by the surrounding side beams 6. As can be seen from this, the mounting beam 4 is not located at the side edge position of the battery pack 100, so that it can ensure the connection stability between the non-side edge position of the battery pack 100 and the mounting point in the application scene, and improve the problem that the non-side edge position of the battery pack 100 vibrates relative to the mounting point in the application scene. Of course, the present application is not limited to this, and the side beams 6 are not limited to four, for example, may be more than four or less than four, and the frame surrounded by the side beams 6 is not limited to a rectangular frame, and may be, for example, another polygonal frame.

[0062] In some specific examples, when there is one mounting beam 4, the bottom plate 1 may include two subplates, each of which is located on both sides of the mounting beam 4 in the width direction, making it easy to assemble; when there are multiple mounting beams 4 and the multiple mounting beams 4 are arranged at intervals along the first direction, the bottom plate 1 may include multiple subplates arranged at intervals along the first direction, and the number of subplates is one more than the number of mounting beams 4, ensuring that one subplate is provided on each side of the width direction of each mounting beam 4 and one subplate is disposed between two adjacent mounting beams 4. The first direction may be the length direction of the battery pack 100 or the width direction of the battery pack 100.

[0063] In some embodiments of the present application, as shown in Figs. 1 and 3, the length direction of the mounting beam 4 is the length direction of the battery pack 100 (the F1 direction shown in Fig. 1 is the length direction of the battery pack 100), the width direction of the mounting beam 4 is the width direction of the battery pack 100 (the F2 direction shown in Fig. 1 is the width direction of the battery pack 100), and the mounting beam 4 is at the center position of the width direction of the battery pack 100. Note that the thickness direction of the mounting beam 4 and the thickness direction of the battery pack 100 are both vertical directions (the F3 direction shown in Fig. 1). As a result, since the mounting beam 4 is the central vertical beam of the battery pack 100, it is possible to improve the connection stability between the central position of the battery pack 100 and the mounting point in the application scene, and to improve the problem that the central position of the battery pack 100 vibrates with respect to the mounting point in the application scene. In addition, by setting the mounting beam 4 as the central vertical beam, it is possible to further improve the vibration resistance effect and the overall structural reliability of the battery pack 100.

[0064] Naturally, the present application is not limited thereto, and in other embodiments of the present application, the length direction of the mounting beam 4 is the width direction of the battery pack 100, the width direction of the mounting beam 4 is the length direction of the battery pack 100, and the mounting beam 4 is at the center position in the length direction of the battery pack 100. As a result, since the mounting beam 4 is the central horizontal beam of the battery pack 100, it is possible to improve the connection stability between the central position of the battery pack 100 and the mounting point in the application scene, and to improve the problem that the central position of the battery pack 100 vibrates relative to the mounting point in the application scene, and further, by setting the mounting beam 4 as the central horizontal beam, it is possible to further improve the vibration resistance effect and the overall structural reliability of the battery pack 100.

[0065] In the related art, the battery pack is generally fixed to the chassis of the vehicle by lugs on the side beams on both sides of the length or width of the battery pack, but the distance between the fixing points on both sides is far and the battery pack is heavy, and the middle part of the battery pack is likely to vibrate up and down when running, that is, the further away from the fixing point, the larger the vibration amplitude becomes, and the more likely the structure is damaged by vibration or the more likely noise is generated. In the battery pack 100 according to the embodiment of the present application, the mounting beam 4 is provided at the center position in the width direction of the battery pack 100 so as to extend along the length direction of the battery pack 100, and a plurality of connection assemblies 5 are provided on the mounting beam 4 at intervals along the length direction of the mounting beam 4, so that the center part of the battery pack 100 is connected to the chassis of the vehicle body, and the strength of the battery pack 100 and the vehicle can be effectively improved, the vehicle uses the battery pack 100 to improve the crush resistance strength of the chassis, and the battery pack 100 uses the chassis to improve the vibration mode of the pack body, and the defect of the large vibration amplitude of the middle part of the battery pack 100 is eliminated.

[0066] In addition, other configurations of the battery pack 100 according to the embodiment of the first aspect of the present application are provided with reference to the battery pack 100 according to the embodiment of the second aspect described below, so that the performance of the battery pack 100 according to the embodiment of the first aspect of the present application is superior. For example, in some battery packs 100 according to the embodiment of the first aspect of the present application, the connection assembly 5 may further include a nut 53, a first sealing member 54, a second sealing member 55, and a third sealing member 56, and the description thereof will be omitted here. In addition, the assembly steps of the battery pack 100 according to the embodiment of the first aspect of the present application can be referred to the assembly steps of the battery pack 100 according to the embodiment of the second aspect described below, and the description thereof will be omitted here.

[0067] Hereinafter, a battery pack 100 according to an embodiment of the second aspect of the present invention will be described with reference to the drawings.

[0068] As shown in FIG. 5 and FIG. 6, the battery pack 100 includes a bottom plate 1, a cell 2, and a top plate 3, where the cell 2 is provided above the bottom plate 1, and the top plate 3 is provided above the cell 2. That is, the top plate 3 is located above the bottom plate 1, and the cell 2 is located between the top of the bottom plate 1 and the bottom of the top plate 3. The bottom plate 1 is provided below the cell 2 so as to support the cell 2. Note that the "up" and "down" directional nouns described in this specification are based on the case where the battery pack 100 is attached to an application scene. For example, when the battery pack 100 is attached to the body 200 of the vehicle 1000, the up-down direction refers to the up-down direction of the vehicle 1000, that is, the top of the vehicle 1000 is "up" and the bottom of the vehicle 1000 is "down".

[0069] 5 and 6, in some embodiments of the present application, the battery pack 100 may further include a connection assembly 5 for attaching the battery pack 100 to an attachment point in an application scene, that is, by providing the connection assembly 5, the battery pack 100 is connected to an attachment position in an application scene, for example, when the battery pack 100 is applied to a vehicle 1000, the connection assembly 5 may be connected to a body 200 of the vehicle 1000, in which case the attachment point is located in the body 200. However, the application scene of the battery pack 100 is not limited to the vehicle 1000, and may be, for example, an application scene of a drone, an energy storage device, etc.

[0070] Specifically, by providing the connection assembly 5, the battery pack 100 can be connected to an application scene to realize installation of the battery pack 100 or improve the installation stability of the battery pack 100. For example, in some embodiments of the present application, when the battery pack 100 is installed in the vehicle 1000, the connection assembly 5 may be connected to the chassis of the vehicle body 200. In this case, when the battery pack 100 is also connected to the vehicle body 200 by another installation structure, by providing the connection assembly 5, the installation stability of the battery pack 100 can be improved. When the battery pack 100 is not connected to the vehicle body 200 by another installation structure, by providing the connection assembly 5, the battery pack 100 can be installed in a suspended manner.

[0071] As shown in Figures 5 and 6, the connection assembly 5 includes a sleeve 51 and a nut 53, the sleeve 51 includes a sleeve portion 511 and a connection portion 514, the sleeve portion 511 extends along the vertical direction (it may extend vertically along the vertical direction or may extend at an angle along the vertical direction) and is located below the top plate 3, i.e., the sleeve portion 511 is restricted below the top plate 3, that is, the sleeve portion 511 is restricted by its own structure and / or external structure and cannot exit the top plate 3 upward relative to the top plate 3, the connection portion 514 is connected to the upper end of the sleeve portion 511 and passes through the top plate 3, that is, at least a portion of the connection portion 514 is located above the top plate 3, and as can be seen, as shown in Figure 8, the top plate 3 has an escape hole 30 through which the connection portion 514 can pass.

[0072] 6 and 8, at least a part of the outer peripheral surface of the connecting portion 514 located above the top plate 3 has a male thread, and the nut 53 is located above the top plate 3 and is screwed to the outside of the connecting portion 514, thereby restricting the downward movement of the sleeve 51 relative to the top plate 3. As can be seen, the inner peripheral surface of the nut 53 has a female thread, and the nut 53 can be screwed to the outer peripheral wall of the connecting portion 514 by screwing the female thread and the male thread, so that the fitting between the nut 53 and the connecting portion 514 can be easily and effectively realized, and the downward movement of the sleeve 51 relative to the top plate 3 can be prevented by abutting and stopping the nut 53 above the top plate 3.

[0073] As a result, in the battery pack 100 according to the embodiment of the present application, at least a portion of the connection portion 514 penetrates above the top plate 3 and has a male thread on its outer peripheral surface, so that when the nut 53 is attached, it is easy to visualize and the assembly of the nut 53 can be completed easily, quickly and accurately.

[0074] In the related art, the entire sleeve is located below the top plate and is formed with an internal thread, and a locking bolt having an external thread is inserted downward from above the top plate to screw into the internal thread of the sleeve, preventing the sleeve from moving downward relative to the top plate. However, since it is difficult to ensure that the internal thread hole at the upper end of the sleeve faces the center of the relief hole on the top plate in this way, it is difficult to quickly and accurately screw the locking bolt into the internal thread hole at the upper end of the sleeve after inserting downward through the relief hole in the top plate, resulting in low assembly efficiency and easy damage to the internal thread at the upper end of the sleeve, which causes structural defects. In the battery pack 100 according to the embodiment of the present application, the sleeve 51 has a connection part 514 that penetrates above the top plate 3, and the connection part 514 has an external thread on its outer circumferential surface, so that when the nut 53 is attached, it is easy to visualize, and the assembly of the nut 53 can be completed easily, quickly, and accurately.

[0075] In some embodiments of the present application, as shown in FIG. 6 and FIG. 8, the connection assembly 5 further includes a first sealing member 54, in which the outer diameter of the sleeve portion 511 is larger than the outer diameter of the connection portion 514, and the first sealing member 54 is fitted to the outside of the connection portion 514 and interposed between the sleeve portion 511 and the top plate 3, that is, the first sealing member 54 is located between (the upper end of) the sleeve portion 511 and the top plate 3 and surrounds the connection portion 514. In this way, by providing the first sealing member 54, it is possible to improve the sealing of the battery pack 100. As can be understood, in order to realize that the connection portion 514 penetrates upwardly through the top plate 3, it is necessary to form an escape hole 30 in the top plate 3 so that the battery pack 100 is not sealed, and by providing the first sealing member 54 surrounding the connection portion 514 and located between the top plate 3 and the upper end of the sleeve portion 511, it is possible to reliably realize the sealing of the escape hole 30 when the battery pack 100 is shipped (i.e., when the battery pack 100 is not installed in a vehicle). As can also be understood, when the nut 53 is tightened, the top plate 3 can press the first sealing member 54, thus ensuring the sealing effect.

[0076] In some embodiments of the present application, as shown in Figs. 9 and 10, the nut 53 has a shielding portion 531 at the top thereof, which is annular and located above the connecting portion 514 to shield the screwing portion between the connecting portion 514 and the nut 53. In this way, the shielding portion 531 can be used to shield and protect the screwing portion between the nut 53 and the connecting portion 514 and the first sealing member 54, etc., and can prevent external water droplets from entering the screwing portion between the nut 53 and the connecting portion 514 and flowing into the first sealing member 54 to form a puddle, thereby more effectively protecting the battery pack 100. As can be understood, the outside of the battery pack 100 is generally in a salt spray environment, and the accumulated water is corrosive, and if the first sealing member 54 comes into contact with the accumulated water for a long time, it will shorten the service life of the first sealing member 54 and affect the sealing of the battery pack 100.

[0077] 10, in some embodiments of the present application, when the outer diameter of the sleeve portion 511 is larger than the outer diameter of the connection portion 514, the connection assembly 5 further includes a first sealing member 54, and the first sealing member 54 is fitted to the outside of the connection portion 514 and interposed between the upper end of the sleeve portion 511 and the bottom surface of the top plate 3, when the nut 53 abuts against the top plate 3, there is a gap S between the bottom surface of the shielding portion 531 and the top surface of the connection portion 514. This ensures the compression amount of the first sealing member 54, and avoids the problem that the first sealing member 54 is not compressed to an appropriate level and the bottom surface of the shielding portion 531 comes into contact with the top surface of the connection portion 514 and is abutted and stopped, resulting in insufficient sealing level due to the compression amount of the first sealing member 54 being too small, thereby improving the sealing effect. That is, after the nut 53 is tightened, a gap S is still maintained between the shielding portion 531 of the nut 53 and the top surface of the sleeve 51, and the purpose is to ensure that the tightening surface of the nut 53 is maintained on a plane where the bottom surface of the nut 53 and the top surface of the top plate 3 are in contact, so that after the nut 53 presses against the top plate 3, the top plate 3 presses against the first sealing member 54 downward, thereby realizing sealing between the top plate 3 and the sleeve 51.

[0078] In some embodiments of the present application, as shown in Figures 8 and 10, the battery pack 100 further includes a mounting beam 4, which includes a beam main body portion 41 and a beam top portion 43, both of which are located between the bottom plate 1 and the top plate 3, the beam top portion 43 is connected to the upper end of the beam main body portion 41 and supported below the top plate 3, the beam top portion 43 has a fitting hole 431, the sleeve portion 511 extends along the vertical direction and is inserted into the mounting beam 4, and its upper end is supported below the beam top portion 43, the connection portion 514 passes through the fitting hole 431, and the first sealing member 54 is fitted into the fitting hole 431 and has an initial thickness greater than the thickness of the beam top portion 43, that is, during assembly, the first sealing member 54 is partially located within the fitting hole 431 and the other portion is located outside the fitting hole 431, and after assembly in the correct position, it may be compressed to be completely located within the fitting hole 431. This ensures the amount of compression of the first sealing member 54, and avoids the problem of the first sealing member 54 being compressed too little and the sealing level being insufficient when the first sealing member 54 is not compressed to an appropriate level and the top surface of the sleeve portion 511 is abutted against the bottom surface of the beam top portion 43, and when the first sealing member 54 is compressed to an appropriate level, the top surface of the sleeve portion 511 is abutted against the bottom surface of the beam top portion 43, thereby avoiding the problem of the first sealing member 54 being compressed too much and causing permanent deformation of the first sealing member 54, and ultimately causing cracks in the first sealing member 54 and causing sealing defects.

[0079] That is, in order to ensure that the first sealing member 54 is compressed to an appropriate level, the initial thickness of the first sealing member 54 in its free state needs to be greater than the thickness of the beam top 43, and after the nut 53 is tightened to compress the first sealing member 54, the thickness of the first sealing member 54 after it is subjected to a force is equal to the thickness of the beam top 43. The present application can realize the control over the thickness of the first sealing member 54 after compression by limiting the thickness of the beam top 43, and the compression amount of the first sealing member 54 has a large relationship with the sealing properties of the first sealing member 54. For example, if the compression ratio of the first sealing member 54 is too small, it will cause sealing failure, and if the compression ratio of the first sealing member 54 is too large, cracks will occur in the first sealing member 54, causing sealing failure or shortening the service life of the first sealing member 54.

[0080] In one specific example of the present application, in order to ensure that the compression amount of the first sealing member 54 is appropriate, the nut 53 is tightened to the connection portion 514 of the sleeve 51, the nut 53 presses the top plate 3 downward, the top plate 3 and the mounting beam 4 are brought into contact with each other, and the mounting beam 4 and the sleeve 51 are welded together. When the nut 53 is not tightened, the height of the joint surface between the upper end surface of the sleeve portion 511 and the bottom surface of the first sealing member 54 is lower than the bottom surface of the beam top portion 43. The height difference between these two surfaces ensures the compression amount of the first sealing member 54, and avoids the compression amount of the first sealing member 54 being too large, causing permanent deformation of the first sealing member 54 (which in turn causes cracks in the first sealing member 54 and causes sealing defects), and also avoids the problem of the compression amount of the first sealing member 54 being too small, resulting in insufficient sealing level.

[0081] In some embodiments of the present application, as shown in Fig. 10, the connection assembly 5 further includes a second sealing member 55 located on the top of the nut 53 and surrounding the inner hole of the nut 53, thereby realizing engagement and sealing between the battery pack 100 and the attachment point in the application scene. For example, in the example shown in Fig. 10, when the nut 53 includes a shielding portion 531, the second sealing member 55 may be located on the top of the shielding portion 531.

[0082] In addition, in order to improve the fitting reliability and effectiveness of the second sealing member 55, in some embodiments of the present application, a groove can be provided on the top of the nut 53. For example, in the example shown in FIG. 10, a groove can be provided on the top wall of the shielding portion 531, so that a portion of the second sealing member 55 can be fitted into the groove. In this manner, the amount of compression of the second sealing member 55 can be limited by limiting the depth of the groove.

[0083] However, the battery pack in the related art can only realize the sealing of itself, and cannot realize the connection and sealing between the battery pack and the chassis of the vehicle. The chassis of the vehicle needs to have a screw through hole communicating with the fixing hole of the battery pack, but forming a screw through hole in the chassis causes a sealing defect in the corresponding part of the vehicle body. The present application realizes the connection and sealing between the top of the battery pack 100 and the chassis by adding a second sealing member 55 to the joint surface area between the battery pack 100 and the chassis. That is, by adding the second sealing member 55 to the top of the nut 53, the second sealing member 55 at the top of the nut 53 is compressed and joined during the process of tightening and joining the battery pack 100 to the chassis of the vehicle, thereby realizing the sealing between the top of the battery pack 100 and the chassis.

[0084] 10, the top surface of nut 53 is higher than the top surface of top plate 3, and as can be understood, when nut 53 includes shielding portion 531, the top surface of shielding portion 531 becomes the top surface of nut 53. In this way, when battery pack 100 is fastened to the chassis of a vehicle, the feature that at least a portion of nut 53 is higher than top plate 3 (i.e., protruding from top plate 3) limits the relative distance between top plate 3 and the chassis of the vehicle, and avoids the problem that the chassis of the vehicle presses against top plate 3 and deforms top plate 3, thereby effectively protecting battery pack 100.

[0085] In some embodiments of the present application, as shown in FIG. 9 and FIG. 11, the sleeve 51 has a boss 513, and the connection assembly 5 further includes a connection member 52 including a head portion 521 and a rod portion 522, the head portion 521 is connected to the lower end of the rod portion 522 and supported below the boss 513, and the rod portion 522 passes upward through the sleeve 51, the top plate 3 and the nut 53, that is, the rod portion 522 passes through the sleeve 51, the top plate 3 and the nut 53, and the upper end is located above the nut 53. In this way, the upper end of the rod portion 522 is connected to a mounting point such as a car body, so that the connection assembly 5 can be easily and effectively connected to the mounting point in the application scene, and it can be ensured that the connection assembly 5 provides an upward force to the mounting beam 4 under a downward acting force such as the gravity of the cell 2 itself. Note that the type of the connection member 52 is not limited to a specific type, and may be, for example, a bolt, a rivet, a pin, etc. In addition, for other specifications and functions of the connection member 52 of this embodiment, the description of the battery pack 100 of the embodiment of the first aspect can be referred to, and the description will be omitted here.

[0086] 11, the connection assembly 5 further includes a third sealing member 56 that is fitted to the outside of the rod portion 522 and interposed between the head portion 521 and the boss 513. In other words, the third sealing member 56 is located between (the upper end of) the head portion 521 and (the lower end of) the boss 513, and surrounds the rod portion 522. For example, the third sealing member 56 may be fitted to the boss 513 or the head portion 521. Thus, by providing the third sealing member 56, it is possible to improve the sealing performance of the fitting portion between the connection member 52 and the sleeve 51, and to prevent water from flowing upward from the hollow portion 510 of the sleeve 51 into the vehicle body.

[0087] In addition, by providing the second sealing member 55 and the third sealing member 56, thorough sealing can be achieved after the battery pack 100 and the vehicle are connected, thereby avoiding a situation in which a sealing failure occurs in the vehicle body when the battery pack 100 is connected to a screw hole formed in the chassis of the vehicle, and preventing water from entering the vehicle body when the vehicle runs on water.

[0088] In addition, all other configurations of the battery pack 100 according to the embodiment of the second aspect of the present application are established with reference to the battery pack 100 according to the embodiment of the first aspect described above, thereby making the performance of the battery pack 100 according to the embodiment of the second aspect of the present application superior.

[0089] For example, in some battery packs 100 according to the second embodiment of the present application, as shown in FIG. 11, the mounting beam 4 may further include a beam bottom portion 42 connected to the lower end of the beam body portion 41 and supported below the bottom plate 1, and the sleeve 51 further includes a bottom edge portion 512 connected to the lower end of the sleeve portion 511 and supported below the mounting beam 4 to restrict the sleeve portion 511 below the top plate 3. As a result, since the mounting beam 4 is not completely located above the bottom plate 1 but includes the beam bottom portion 42 located below the bottom plate 1, the point of application of force by the mounting beam 4 to the bottom plate 1 is not located above the bottom plate 1 but is located below the bottom plate 1, so that the bottom plate 1 is not easily separated from the mounting beam 4 by a downward acting force such as the gravity of the cell 2, and further improves the reliability of the support of the bottom plate 1 by the mounting beam 4 and improves the robustness and stability of the engagement between the mounting beam 4 and the bottom plate 1.

[0090] In addition, since the sleeve 51 includes a bottom edge portion 512 supported below the mounting beam 4, the sleeve 51 can easily and effectively engage with the mounting beam 4, improving the reliability of the connection assembly 5 providing an upward force to the mounting beam 4, and avoiding the problem of the connection assembly 5 moving upward relative to the mounting beam 4 and separating from the mounting beam 4. In addition, by providing the beam bottom portion 42 and the bottom edge portion 512, the sleeve portion 511 can be easily and reliably restricted below the top plate 3. Of course, the present application is not limited thereto, and the sleeve portion 511 may be restricted below the top plate 3 by other methods, for example, a method of abutting and stopping the upper end surface of the sleeve portion 511 below the bottom surface of the top plate 3, and the description thereof will be omitted here.

[0091] For example, in some battery packs 100 according to the second embodiment of the present application, as shown in Figs. 12 and 13, the length direction of the mounting beam 4 is the length direction of the battery pack 100 (the F1 direction shown in Fig. 12 is the length direction of the battery pack 100), the width direction of the mounting beam 4 is the width direction of the battery pack 100 (the F2 direction shown in Fig. 12 is the width direction of the battery pack 100), and the mounting beam 4 is at the center position of the width direction of the battery pack 100. The thickness direction of the mounting beam 4 and the thickness direction of the battery pack 100 are both vertical directions (the F3 direction shown in Fig. 12 is the thickness direction of the battery pack 100). As a result, since the mounting beam 4 is the central vertical beam of the battery pack 100, the connection stability between the central position of the battery pack 100 and the mounting point in the application scene can be improved, and the problem that the central position of the battery pack 100 vibrates relative to the mounting point in the application scene can be improved. Furthermore, by setting the mounting beam 4 as the central vertical beam, the vibration resistance effect and the overall structural reliability of the battery pack 100 can be further improved.

[0092] Other configurations and operations of the battery pack 100 according to the embodiments of the first and second aspects of the present application are known to those skilled in the art and will not be described in detail here.

[0093] The assembly steps of the battery pack 100 according to the embodiment of the second aspect of the present application will be briefly described below.

[0094] As shown in Figures 3 and 4, a tray 101 including a side beam 6 and a bottom plate 1 is prepared, and first, the mounting beam 4 is attached to the tray 101. Next, the sleeve 51 is assembled with the mounting beam 4 from bottom to top. As shown in Figure 2, the bottom is sealed by arc welding at the joint surface between the bottom edge 512 of the bottom of the sleeve 51 and the beam bottom 42 of the mounting beam 4. However, this is not limited to this, and sealing can be achieved, for example, by applying an adhesive. Then, as shown in FIG. 8, a first sealing member 54 is fitted onto the top of the sleeve 51. Next, as shown in FIG. 2, structural adhesive 7 is applied to the bottom of the cell 2, and then the cell 2 is placed from top to bottom into the tray 101 to bond and fix the cell 2 and the bottom plate 1 together. Then, thermally conductive adhesive 8 is applied to the top of the cell 2. As shown in FIG. 12, sealing adhesive 9 is applied in a ring shape to the top of the surrounding side beams 6 to seal the edges of the tray 101 and the top plate 3. Next, the top plate 3 is assembled onto the top of the cell 2, and the top plate 3 and the cell 2 are bonded together with thermally conductive adhesive 8. Then, as shown in FIG. 13, the peripheral edges of the top plate 3 and the peripheral side beams 6 of the tray 101 are fixed together with rivets 61.

[0095] Hereinafter, a vehicle 1000 according to an embodiment of the third aspect of the present application will be described with reference to the drawings.

[0096] 14, a vehicle 1000 includes a vehicle body 200 and a battery pack 100 according to an embodiment of the first or second aspect of the present application, and the battery pack 100 is connected to the vehicle body 200 by a connection assembly 5, for example, it can be understood that the battery pack 100 is connected to the chassis of the vehicle body 200. Thus, by providing the battery pack 100 according to the embodiment of the first or second aspect of the present application, the overall performance of the vehicle 1000 can be improved.

[0097] The remaining configuration and operation of vehicle 1000 according to embodiments of the present application are known to those skilled in the art and will not be described in detail herein.

[0098] In the description of this specification, a description referring to the terms "one embodiment", "several embodiments", "examples", "specific examples" or "several examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the general expressions of the above terms do not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics described can be appropriately combined in any one or more embodiments or examples. In addition, if not mutually inconsistent, a person skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples.

[0099] Although embodiments of the present application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and objectives of the present application, and that the scope of the present application is limited by the claims and their equivalents.

Claims

1. A battery pack (100), A cell (2); A bottom plate (1) provided below the cell (2) to support the cell (2); A top plate (3) provided above the cell (2); a beam body portion (41) located between the bottom plate (1) and the top plate (3), and an attachment beam (4) including a beam bottom portion (42) connected to a lower end of the beam body portion (41) and disposed below the bottom plate (1); a connection assembly (5) for attaching the battery pack (100) to an attachment point on an attachment target, the connection assembly (5) providing an upward acting force to the attachment beam (4) when the battery pack (100) is attached to the attachment point on the attachment target by coupling the connection assembly (5) to the attachment beam (4); The connection assembly (5) includes a sleeve (51), the sleeve (51) including a sleeve portion (511) and a bottom edge portion (512); The battery pack (100) is characterized in that the sleeve portion (511) penetrates the mounting beam (4) in the vertical direction, and the bottom edge portion (512) is connected to the lower end of the sleeve portion (511) and is positioned below the beam bottom portion (42).

2. 2. The battery pack (100) of claim 1, wherein the connection assemblies (5) are multiple and spaced apart along the length of the mounting beam (4).

3. The sleeve (51) has a boss (513), The connection assembly (5) comprises:

2. The battery pack (100) of claim 1, further comprising a connecting member (52) including a head portion (521) and a rod portion (522), the head portion (521) being connected to a lower end of the rod portion (522) and positioned below the boss (513), the rod portion (522) penetrating the sleeve (51) and the top plate (3), and an upper end of the rod portion (522) extending above the top plate (3).

4. 2. The battery pack (100) of claim 1, wherein the connection assembly (5) further includes a first sealing member (54), the sleeve (51) includes a connection portion (514), the connection portion (514) is connected to an upper end of the sleeve portion (511), the connection portion (514) penetrates the top plate (3), the outer diameter of the sleeve portion (511) is larger than the outer diameter of the connection portion (514), and the first sealing member (54) is fitted to the outside of the connection portion (514) and interposed between the sleeve portion (511) and the top plate (3).

5. The battery pack (100) of claim 4, characterized in that the connection assembly (5) further includes a nut (53) having a male thread on an outer peripheral surface of at least a portion of the connection portion (514) located above the top plate (3), and the nut (53) is screwed onto the outside of the connection portion (514).

6. 6. The battery pack (100) of claim 5, wherein the connection assembly (5) further includes a second sealing member (55), the second sealing member (55) being located on top of the nut (53) and surrounding an inner hole of the nut (53).

7. The battery pack (100) according to claim 5, characterized in that a shielding portion (531) is arranged on the top of the nut (53), the shielding portion (531) being annular and located above the connection portion (514) to shield the threaded engagement portion between the connection portion (514) and the nut (53).

8. The battery pack (100) of claim 3, characterized in that the connection assembly (5) further includes a third sealing member (56), the third sealing member (56) being fitted onto the outside of the rod portion (522) and interposed between the head portion (521) and the boss (513).

9. 2. The battery pack (100) of claim 1, wherein the beam bottom portion (42) includes a central portion (421) and an outer peripheral portion (422), the outer peripheral portion (422) is arranged to surround the central portion (421), the thickness of the central portion (421) is greater than the thickness of the outer peripheral portion (422), and the bottom edge portion (512) is supported below the central portion (421).

10. 10. The battery pack (100) of claim 9, wherein the beam bottom portion (42) further includes a transition portion (423) connected between the central portion (421) and the outer peripheral portion (422), the transition portion (423) having a thickness gradually decreasing in a direction from the central portion (421) to the outer peripheral portion (422), a top surface of the central portion (421) being flush with a top surface of the outer peripheral portion (422), and a bottom surface of the central portion (421) smoothly transitioning via a bottom surface of the transition portion (423) to be connected to a bottom surface of the outer peripheral portion (422).

11. The battery pack (100) according to any one of claims 1 to 10, characterized in that the cells (2) are provided on both sides of the mounting beam (4) in the width direction.

12. 12. The battery pack (100) of claim 11, further comprising a plurality of side beams (6) surrounding the bottom plate (1), the plurality of side beams (6) and the bottom plate (1) being connected to form a tray (101), the plurality of side beams (6) surrounding a frame, and both the cells (2) and the mounting beams (4) being disposed within the frame.

13. A battery pack (100), A cell (2); A bottom plate (1) provided below the cell (2) to support the cell (2); A top plate (3) provided above the cell (2); a beam body portion (41) located between the bottom plate (1) and the top plate (3), and an attachment beam (4) including a beam bottom portion (42) connected to a lower end of the beam body portion (41) and disposed below the bottom plate (1); a connection assembly (5) for attaching the battery pack (100) to an attachment point on an attachment target, the connection assembly (5) providing an upward acting force to the attachment beam (4) when the battery pack (100) is attached to the attachment point on the attachment target by coupling the connection assembly (5) to the attachment beam (4); The battery pack (100) is characterized in that the cells (2) are bonded to the bottom plate (1).

14. The battery pack (100) according to any one of claims 1 to 13, characterized in that the top plate (3) is a cooling plate and is glued to the cells (2).

15. The battery pack (100) according to any one of claims 1 to 14, characterized in that the mounting beam (4) is a hollow beam having a reinforcing rib (44) provided therein, the reinforcing rib (44) extending along the longitudinal direction of the mounting beam (4), being multiple, and being arranged at intervals within the beam main body portion (41) along the vertical direction.

16. A battery pack (100), comprising: A cell (2); A bottom plate (1) provided below the cell (2) to support the cell (2); A top plate (3) provided above the cell (2); a beam body portion (41) located between the bottom plate (1) and the top plate (3), and an attachment beam (4) including a beam bottom portion (42) connected to a lower end of the beam body portion (41) and disposed below the bottom plate (1); a connection assembly (5) for attaching the battery pack (100) to an attachment point on an attachment target, the connection assembly (5) providing an upward acting force to the attachment beam (4) when the battery pack (100) is attached to the attachment point on the attachment target by coupling the connection assembly (5) to the attachment beam (4); The battery pack (100) is characterized in that the top wall of the outer edge of the beam bottom portion (42) has a countersunk groove (424), the outer surface of the countersunk groove (424) is open, and the bottom plate (1) abuts against and is fixed to the inner wall of the countersunk groove (424).

17. The battery pack (100) of any one of claims 1 to 10, characterized in that the mounting beam (4) further includes a beam top portion (43), which is connected to an upper end of the beam main body portion (41) and is positioned below the top plate (3), the sleeve portion (511) extends in the vertical direction and penetrates the mounting beam (4), and the upper end of the sleeve portion (511) is supported below the beam top portion (43).

18. A vehicle (1000) comprising a vehicle body (200) and a battery pack (100) according to any one of claims 1 to 17, wherein the connection assembly (5) is connected to the vehicle body (200).

Images