Battery box and battery pack

Abstract

The utility model provides a battery box and a battery pack, the battery box comprises at least two box bodies which are arranged in sequence, a groove is formed in the edge of at least one end of the side wall of each box body in the battery box, a notch is formed in one side, facing the adjacent box body, of each groove, the notches of the grooves of the two adjacent box bodies are opposite and form a fixed cavity, and the fixed cavity is provided with a plurality of through holes. A fixing piece and a plurality of fasteners are arranged in the fixing cavity, and the fixing piece is fixedly connected with the side walls of the two adjacent box bodies through the fasteners. In this way, the adjacent box bodies are connected through the fixing piece embedded in the fixing cavity and the multiple fastening pieces. Through the scheme, the occupied space of the battery box is reduced, the structural compactness is improved, and the battery box can be more easily mounted in a vehicle or equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery pack, in particular to a battery box and a battery pack. BACKGROUND

[0002] In some battery boxes of battery pack, multiple layers of box bodies are stacked in sequence, and each box body is provided with a battery cell. In order to realize the connection of adjacent box bodies, a protruding lug structure is arranged on the side wall of the box body, and the connection of adjacent box bodies is realized by fixedly connecting the corresponding lug structures on the two adjacent box bodies.

[0003] In the above scheme, the protruding lug structure needs to occupy the space outside the side wall of the box body, resulting in that the battery box occupies a large space, which affects the structural compactness of the vehicle or equipment using the battery box, or the battery box is difficult to install in the vehicle or equipment. UTILITY MODEL CONTENT

[0004] The main purpose of the present application is to provide a battery box and a battery pack, so as to reduce the occupied space of the battery box and improve the structural compactness.

[0005] In order to achieve the above purpose, according to one aspect of the present application, a battery box is provided, which comprises at least two box bodies arranged in sequence, at least one end edge of the side wall of each box body is provided with a groove, the groove is provided with a notch towards one side of the adjacent box body, the notches of the grooves of the two adjacent box bodies are opposite to each other and constitute a fixed cavity, the battery box further comprises a fixing member located in the fixed cavity and a plurality of fasteners, and the plurality of fasteners respectively fix the fixing member and the side walls of the two adjacent box bodies.

[0006] Further, the fixing member and the fastener are not protruding from the fixed cavity, the fixing member has a through hole, the bottom wall of the groove has a connecting hole, and the fastener passes through the through hole and cooperates with the connecting hole.

[0007] Further, the fastener is a screw, and the battery box further comprises a threaded sleeve fixed in the connecting hole, the hardness of the threaded sleeve is greater than that of the box body, and the fastener and the threaded sleeve are screw connected.

[0008] Further, the fixing member is a long strip-shaped plate structure, and the shape of the fixed cavity matches the fixing member.

[0009] Further, the box body is a cuboid structure, the box body comprises oppositely arranged left and right side walls, and the left and right side walls are both provided with grooves; the battery box comprises at least two fixing members, and the left and right side walls are respectively fixedly connected with different fixing members.

[0010] Further, the side wall of the box is an extruded profile, the extruded profile has a solid part and a hollow part connected to each other after being extruded, the hollow part has a plurality of weight-reducing holes extending along the length direction of the extruded profile, and the solid part is a solid structure, wherein the groove is arranged on the solid part along the length direction of the extruded profile.

[0011] Further, the battery box comprises at least three boxes, the at least three boxes are connected in sequence in the vertical direction, each box has a bottom wall and an upper opening, in the adjacent two boxes, the bottom wall of the upper box seals the upper opening of the lower box, and the battery box further comprises an upper cover, the upper cover seals the upper opening of the uppermost box.

[0012] Further, the box is a cuboid structure, the box comprises oppositely arranged left and right side walls and oppositely arranged front and rear side walls, and the groove is arranged on the left side wall and / or the right side wall; the battery box further comprises a connecting beam, the connecting beam is arranged at the end of the front side wall and / or the end of the rear side wall, and the adjacent two connecting beams on the adjacent two boxes are fixedly connected.

[0013] Further, the connecting beam is rectangular in the cross section perpendicular to the length direction of the connecting beam, the connecting beam has a through slot in the length direction of the connecting beam, and the slot opening of the through slot faces the outer surface of the box.

[0014] Further, the box is a cuboid structure, the box comprises oppositely arranged left and right side walls and oppositely arranged front and rear side walls, and the groove is arranged on the left side wall and / or the right side wall; the battery box further comprises a connecting seat, the connecting seat is arranged on the front side wall and / or the rear side wall, and the connecting seat is used for fixedly connecting with a structure outside the battery box.

[0015] Further, the connecting seat comprises a main body structure and at least one reinforcing plate, the main body structure has at least one through hole and / or at least one through slot, the main body structure is fixedly connected with the box, the reinforcing plate is arranged obliquely relative to the outer surface of the box, one end of the reinforcing plate is fixedly connected with the main body structure, and the other end of the reinforcing plate is fixedly connected with the box.

[0016] Further, the box is a cuboid structure, the box comprises oppositely arranged left and right side walls and oppositely arranged front and rear side walls, and the groove is arranged on the left side wall and / or the right side wall; the battery box further comprises a lifting lug, the lifting lug is arranged on the front side wall and / or the rear side wall, and the lifting lug is used for connecting hoisting equipment.

[0017] The utility model further provides a battery pack, the battery pack includes electric core and above-mentioned battery box, a plurality of electric cores are arranged in each box of battery box.

[0018] In the scheme, at least one end edge of the side wall of each box in the battery box is provided with a groove, the notches of the grooves of two adjacent boxes are opposite and constitute a fixed cavity, a fixing member and a plurality of fasteners are arranged in the fixed cavity, and the plurality of fasteners respectively fix and connect the fixing member and the side walls of the two adjacent boxes. In this way, the connection of the adjacent boxes is realized through the fixing member and the plurality of fasteners embedded in the fixed cavity. Through the scheme, the occupied space of the battery box is reduced, the compactness of the structure is improved, and the battery box can be more easily installed in the vehicle or equipment. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings constituting a part of the specification of the present application are used to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0020] Figure 1 A schematic view of a battery box provided by an embodiment of the present application is shown;

[0021] Figure 2 A schematic view of a box and a fixing member in a battery box provided by an embodiment of the present application is shown;

[0022] Figure 3 A sectional view of a battery box provided by an embodiment of the present application is shown;

[0023] Figure 4 An enlarged view of the position where two boxes in Figure 3 are connected by a fixing member is shown.

[0024] Among the above drawings, the following reference signs are included:

[0025] 10, box; 11, groove; 12, connecting hole; 13, left side wall; 14, right side wall; 15, front side wall; 16, rear side wall; 17, solid part; 18, hollow part;

[0026] 20, fixing member;

[0027] 31, fastener; 32, threaded sleeve;

[0028] 40, upper cover;

[0029] 50, connecting beam;

[0030] 60, connecting seat; 61, main body structure; 62, reinforcing plate;

[0031] 70, lifting lug. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] like Figures 1 to 4 As shown, the present application provides a battery box, comprising at least two boxes 10 arranged in sequence, a groove 11 is provided on at least one end edge of the side wall of each box 10, and a notch is provided on the side of the groove 11 facing the adjacent box 10, and the notches of the grooves 11 of the two adjacent boxes 10 are opposite and form a fixed cavity, and the battery box also includes a fixing member 20 and a plurality of fasteners 31 located in the fixed cavity, and the plurality of fasteners 31 respectively fix the fixing member 20 to the side walls of the two adjacent boxes 10.

[0034] In this solution, a groove 11 is provided on at least one edge of the sidewall of each housing 10 within the battery box. The notches of the grooves 11 of two adjacent housings 10 face each other and form a fixed cavity. A fixing member 20 and multiple fasteners 31 are positioned within the fixed cavity. The multiple fasteners 31 securely connect the fixing member 20 to the sidewalls of the two adjacent housings 10. Thus, the fixing member 20 and multiple fasteners 31 embedded in the fixed cavity achieve connection between adjacent housings 10. This solution reduces the space occupied by the battery box, improves its compactness, and makes it easier to install the battery box in a vehicle or device.

[0035] like Figure 3 and Figure 4 As shown, neither the fixing member 20 nor the fastener 31 protrudes from the fixing cavity. Thus, the fixing member 20 and the fastener 31 do not occupy space outside the outer surface of the case 10, making the battery case compact. The fixing member 20 has a through hole, and the bottom wall of the groove 11 has a connecting hole 12. The fastener 31 passes through the through hole and engages with the connecting hole 12. This simple structure achieves the connection between the fixing member 20 and the case 10.

[0036] In one exemplary embodiment, the connection hole 12 is a blind hole so as not to affect the sealing of the sidewall of the box 10. A sufficient thickness must be maintained between the bottom surface of the blind hole and the inner surface of the box 10 to ensure the structural strength and sealing of the box 10. For example, the distance between the bottom surface of the blind hole and the inner surface of the box 10 is 2 mm.

[0037] Alternatively, in other embodiments not shown, the connecting hole 12 penetrates the bottom wall of the groove 11, and a sealing structure such as a sealing ring, sealing glue, or the like is arranged to seal the connecting position of the fastener 31 and the connecting hole 12, so as to ensure the sealing of the side wall of the box 10.

[0038] Specifically, the fastener 31 is a screw, and the battery box further comprises a threaded sleeve 32 fixed in the connecting hole 12, the hardness of the threaded sleeve 32 is greater than the hardness of the box 10, and the fastener 31 and the threaded sleeve 32 are threadedly connected.

[0039] Through the above arrangement, the reliable connection of the fastener 31 is ensured, and the connection failure is avoided. The side wall of the box 10 can be made of aluminum alloy material, and the threaded sleeve 32 and the fastener 31 can be made of steel material.

[0040] In a specific embodiment, the depth of the fixing cavity is 7 mm, the thickness of the fixing member 20 is 3 mm, and the thickness of the screw nut is 3.5 mm, so that the screw nut does not protrude from the outer surface of the box 10 after the screw is installed.

[0041] In some embodiments, the fixing member 20 is a long strip-shaped plate structure, and the shape of the fixing cavity matches the fixing member 20. The length direction of the fixing member 20 is the length direction of the side wall of the box 10, so that the connection area is large and the connection strength is high.

[0042] In a specific embodiment, the fixing member 20 can be made of cold-rolled steel plate. The fixing member 20 can be made of a whole plate or a plurality of spliced plates.

[0043] As shown in Figure 2 , the box 10 is a cuboid structure, and the box 10 comprises oppositely arranged left and right side walls 13 and 14, and the left and right side walls 13 and 14 each have a groove 11. The battery box comprises at least two fixing members 20, and the left and right side walls 13 and 14 are respectively fixedly connected with different fixing members 20.

[0044] Through the above arrangement, the left and right sides of two adjacent boxes 10 are respectively fixedly connected by the fixing members 20, so as to ensure the connection strength.

[0045] As shown in Figure 3 and Figure 4 , the side wall of the box 10 is an extruded profile, and the extruded profile has a solid part 17 and a hollow part 18 connected with each other after extrusion molding, the hollow part 18 has a plurality of weight-reducing holes extending along the length direction of the extruded profile, and the solid part 17 is a solid structure. The groove 11 is arranged at the solid part 17 of the extruded profile instead of the hollow part 18, so as to ensure the structural strength and the connection reliability with the fixing member 20.

[0046] In the present application, the battery box comprises at least three box bodies 10, the at least three box bodies 10 are connected in sequence in the vertical direction, each box body 10 has a bottom wall and an upper opening, in the adjacent two box bodies 10, the bottom wall of the upper box body 10 seals the upper opening of the lower box body 10, and the battery box further comprises an upper cover 40, the upper cover 40 seals the upper opening of the uppermost box body 10. In this way, the battery box has a multi-layer structure, is compact in structure, and the upper opening of each box body 10 can be sealed.

[0047] As shown in Figure 1 , the box body 10 is a cuboid structure, the box body 10 comprises oppositely arranged left and right side walls 13 and 14 and oppositely arranged front and rear side walls 15 and 16, and the recess 11 is located on the left side wall 13 and / or the right side wall 14; the battery box further comprises a connecting beam 50, the connecting beam 50 is arranged at the end of the front side wall 15 and / or the end of the rear side wall 16, and the adjacent two connecting beams 50 on the adjacent two box bodies 10 are fixedly connected.

[0048] By arranging the connecting beam 50 to connect the adjacent two box bodies 10, the structural strength and sealing performance of the battery box are further improved. Among them, the side wall of the box body 10 on which the connecting beam 50 is arranged should be a side wall with sufficient installation space.

[0049] Specifically, the connecting beam 50 is rectangular in the cross section perpendicular to the length direction thereof, the connecting beam 50 has a through slot in the length direction thereof, and the slot opening of the through slot faces the outer surface of the box body 10. By arranging the through slot, the amount of material can be reduced, and the weight of the battery box can be reduced. The adjacent two connecting beams 50 on the adjacent two box bodies 10 are connected by a plurality of connecting members such as bolts.

[0050] Further, the box body 10 is a cuboid structure, the box body 10 comprises oppositely arranged left and right side walls 13 and 14 and oppositely arranged front and rear side walls 15 and 16, and the recess 11 is located on the left side wall 13 and / or the right side wall 14; the battery box further comprises a connecting seat 60, the connecting seat 60 is arranged on the front side wall 15 and / or the rear side wall 16, and the connecting seat 60 is used for fixedly connecting with the structure outside the battery box. The connecting seat 60 is used for connecting with the chassis and the like structure of the vehicle, so that the installation of the battery box is realized.

[0051] As shown in Figure 1 , the connecting seat 60 comprises a main body structure 61 and at least one reinforcing plate 62, the main body structure 61 has at least one through hole and / or at least one through slot, the main body structure 61 is fixedly connected with the box body 10, the reinforcing plate 62 is arranged obliquely relative to the outer surface of the box body 10, one end of the reinforcing plate 62 is fixedly connected with the main body structure 61, and the other end of the reinforcing plate 62 is fixedly connected with the box body 10.

[0052] The through holes or through slots on the main structure 61 can reduce the amount of material used and the weight of the structure while ensuring the strength of the structure. The number of through holes or through slots is set according to the size and needs of the main structure 61. During installation, the main structure 61 is connected to the chassis or other structures of the vehicle by bolts and other connectors to fix the battery box. By providing a reinforcing plate 62, the connection strength between the main structure 61 and the side wall of the box body 10 is further strengthened to ensure the bearing capacity of the connecting seat 60. The reinforcing plate 62 can be set as one; the reinforcing plate 62 can also be set as multiple and distributed on different sides of the main structure 61. The main structure 61 and the reinforcing plate 62 can be machined separately and then welded together. Alternatively, the connecting seat 60 is an extruded profile structure, which has low processing costs.

[0053] like Figure 1 As shown, the battery box 10 is a rectangular parallelepiped structure. The box 10 includes opposing left and right walls 13 and 14, as well as opposing front and rear walls 15 and 16. The recess 11 is located in the left and / or right walls 13 and 14. The battery box also includes a lifting lug 70 located on the front and / or rear walls 15 and 16. The lifting lug 70 facilitates connection with lifting equipment to hoist the battery box, thereby allowing it to be transported or installed by hoisting. The lifting lug 70 and the connector 60 are not located on the left and right walls 13 and 14 of the box 10, thereby avoiding occupying space on the left or right sides of the box 10.

[0054] The present application also provides a battery pack, which includes battery cells and the above-mentioned battery box, and each box body 10 of the battery box is provided with multiple battery cells.

[0055] In this solution, a groove 11 is provided on at least one end of the side wall of each case 10 within the battery pack. Two adjacent grooves 11 of two adjacent cases 10 form a fixed cavity. A fixing member 20 and multiple fasteners 31 are disposed within the fixed cavity. The multiple fasteners 31 securely connect the fixing member 20 to the side walls of the two adjacent cases 10. Thus, the fixing member 20 and multiple fasteners 31 embedded in the fixed cavity connect adjacent cases 10. This solution reduces the battery pack's footprint, improves its compactness, and makes it easier to install the battery pack in a vehicle or device.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0057] The recitation of ranges of values herein are merely intended to serve as a method of discussion of certain examples. Unless otherwise stated, the scope of the present application is not to be limited to specific relative positions, numerical expressions, and values set forth in these embodiments. Also, it is to be understood that the dimensions shown in the various parts illustrated in the drawings are not necessarily to scale and that, unless otherwise specified, specific numerical values referred to herein are only examples. Other examples of the exemplary embodiments can have different values. It is to be noted that like reference numerals and letters refer to like items in the drawings and, as such, once an item is defined in one drawing, it is not necessary to discuss it further in subsequent drawings.

[0058] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by terms such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "horizontal", "top", "bottom", and the like are generally based on the orientation or positional relationships shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the parts themselves.

[0059] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper", and the like can be used herein to describe the spatial position relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0060] In addition, it should be noted that the use of the terms "first", "second", and the like to describe various components is merely intended to facilitate the description of the corresponding components, and the above terms do not have special meanings unless otherwise stated, and therefore cannot be construed as limiting the scope of protection of the present application.

[0061] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery box, characterized in that: The battery box comprises at least two boxes (10) arranged in sequence, at least one end edge of the side wall of each box (10) is provided with a groove (11), the groove (11) is provided with a notch on the side facing the adjacent box (10), the notches of the grooves (11) of the two adjacent boxes (10) are opposite to each other and form a fixed cavity, and the battery box also comprises a fixing member (20) and a plurality of fasteners (31) located in the fixed cavity, the plurality of fasteners (31) respectively fixedly connecting the fixing member (20) to the side walls of the two adjacent boxes (10).

2. The battery box according to claim 1, characterized in that: The fixing member (20) and the fastener (31) do not protrude from the fixing cavity; the fixing member (20) has a through hole; the bottom wall of the groove (11) has a connecting hole (12); the fastener (31) passes through the through hole and cooperates with the connecting hole (12).

3. The battery box according to claim 2, characterized in that: The fastener (31) is a screw, and the battery box further comprises a threaded sleeve (32). The threaded sleeve (32) is fixed in the connection hole (12), the hardness of the threaded sleeve (32) is greater than the hardness of the box body (10), and the fastener (31) and the threaded sleeve (32) are threadedly connected.

4. The battery box according to claim 1, characterized in that: The fixing member (20) is a long strip plate-like structure, and the shape of the fixing cavity matches the fixing member (20).

5. The battery box according to claim 1, characterized in that: The box body (10) is a rectangular parallelepiped structure, and the box body (10) includes a left side wall (13) and a right side wall (14) arranged opposite to each other, and the left side wall (13) and the right side wall (14) both have the groove (11); the battery box includes at least two fixing members (20), and the left side wall (13) and the right side wall (14) are respectively fixedly connected to different fixing members (20).

6. The battery box according to claim 1, characterized in that: The side wall of the box body (10) is an extruded profile. After extrusion, the extruded profile has a solid portion (17) and a hollow portion (18) connected to each other. The hollow portion (18) has a plurality of weight-reducing holes extending along the length direction of the extruded profile. The solid portion (17) is a solid structure. The groove (11) is arranged on the solid portion (17) along the length direction of the extruded profile.

7. The battery box according to claim 1, characterized in that: The battery box comprises at least three boxes (10), which are connected in sequence in a vertical direction. Each box (10) has a bottom wall and an upper opening. In two adjacent boxes (10), the bottom wall of the box (10) located above blocks the upper opening of the box (10) located below. The battery box also comprises an upper cover (40), which blocks the upper opening of the uppermost box (10).

8. The battery box according to claim 1, characterized in that: The box body (10) is a rectangular parallelepiped structure, comprising a left side wall (13) and a right side wall (14) arranged opposite to each other, and a front side wall (15) and a rear side wall (16) arranged opposite to each other, wherein the groove (11) is located on the left side wall (13) and / or the right side wall (14); the battery box further comprises a connecting beam (50), wherein the connecting beam (50) is arranged at an end of the front side wall (15) and / or an end of the rear side wall (16), and two adjacent connecting beams (50) on two adjacent boxes (10) are fixedly connected.

9. The battery box according to claim 8, characterized in that: The cross section of the connecting beam (50) perpendicular to its length direction is rectangular, and the connecting beam (50) has a through slot along its length direction, with the notch of the slot facing the outer surface of the box body (10).

10. The battery box according to claim 1, characterized in that: The box body (10) is a rectangular parallelepiped structure, comprising a left side wall (13) and a right side wall (14) arranged opposite to each other, and a front side wall (15) and a rear side wall (16) arranged opposite to each other, wherein the groove (11) is located on the left side wall (13) and / or the right side wall (14); the battery box further comprises a connecting seat (60), wherein the connecting seat (60) is arranged on the front side wall (15) and / or the rear side wall (16), and the connecting seat (60) is used for fixed connection with a structure outside the battery box.

11. The battery box according to claim 10, characterized in that: The connecting seat (60) comprises a main structure (61) and at least one reinforcing plate (62), wherein the main structure (61) has at least one through hole and / or at least one through groove, the main structure (61) is fixedly connected to the box body (10), the reinforcing plate (62) is inclined relative to the outer surface of the box body (10), one end of the reinforcing plate (62) is fixedly connected to the main structure (61), and the other end of the reinforcing plate (62) is fixedly connected to the box body (10).

12. The battery box according to claim 1, characterized in that: The box body (10) is a rectangular parallelepiped structure, comprising a left side wall (13) and a right side wall (14) arranged opposite to each other, and a front side wall (15) and a rear side wall (16) arranged opposite to each other, wherein the groove (11) is located on the left side wall (13) and / or the right side wall (14); the battery box further comprises a lifting lug (70), wherein the lifting lug (70) is arranged on the front side wall (15) and / or the rear side wall (16), and the lifting lug (70) is used for connecting a lifting device.

13. A battery pack, characterized in that: The battery pack comprises battery cells and a battery box according to any one of claims 1 to 12, wherein a plurality of the battery cells are arranged in each box body (10) of the battery box.

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