Battery device

Abstract

The utility model provides a battery device which comprises a bottom plate and a frame arranged at the side part of the bottom plate, an accommodating space for accommodating a battery is formed in the bottom plate, the battery is placed on the bottom plate, the bottom plate comprises a bottom surface and a side surface, the edge of the side surface is provided with a flanging, the frame is arranged at the side part, far away from the accommodating space, of the side surface, and the flanging is positioned above the frame. The frame is provided with a cavity, and the top face of the frame is welded to the turned-over edge. The bottom plate forms a basin-shaped structure through stamping, so that the bottom surface, the side surfaces and the turned-over edges of the bottom plate are integrally formed, and the sealing performance of the space in the bottom plate is ensured. And the frame is arranged on the side part of the bottom plate, so that the strength of the basin-shaped bottom plate is further enhanced. And the turnup is welded with the frame, so that the problem of sealing failure caused by welding failure at the bottom of the bottom plate is prevented, and the strength and the sealing performance of the bottom plate are further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, and in particular to a battery device. Background Art

[0002] The battery pack is a key component of new energy vehicles. The battery pack housing consists of a base plate and a frame around the edge of the base plate, creating a space for the batteries. Conventional technology requires welding to connect the frame to the base plate, as well as adjacent frames. This seal can become unreliable after extended use, hindering the battery pack's usability. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art that the battery pack box has many welding parts and the sealing performance cannot be guaranteed, thereby providing a battery device.

[0004] In order to solve the above problems, the utility model provides a battery device, including a base plate and a frame arranged on the side of the base plate, a storage space for accommodating the battery is formed in the base plate, the battery is placed on the base plate, the base plate includes a bottom surface and a side surface, the edge of the side surface is provided with a flange, the frame is provided on the side of the side away from the storage space, and the flange is located above the frame, the frame is provided with a cavity, and the top surface of the frame is welded to the flange.

[0005] The utility model has the following advantages:

[0006] Utilizing the technical solution of the present invention, the base plate is formed into a basin-shaped structure through stamping, so that the bottom surface, side surfaces, and flanges of the base plate are integrally formed, ensuring the sealing performance of the space within the base plate. By providing a frame on the side of the base plate, the strength of the basin-shaped base plate is further enhanced. Furthermore, by welding the flange to the frame, welding failure at the bottom of the base plate, which would lead to sealing failure, is prevented, further enhancing the strength and sealing performance of the base plate. Therefore, the technical solution of the present invention solves the defects of the prior art battery pack box, which has multiple welding locations and cannot guarantee sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0008] Figure 1 A schematic structural diagram of an embodiment of a battery device of the present utility model is shown;

[0009] Figure 2 Shown Figure 1 A schematic structural diagram of the bottom plate of the middle battery device;

[0010] Figure 3 Shown Figure 1 A schematic structural diagram of the frame of the battery device;

[0011] Figure 4 Shown Figure 1 Schematic diagram of the coordination between the base plate and frame of the battery device.

[0012] Description of reference numerals:

[0013] 10. Base plate; 11. Bottom surface; 12. Side surface; 13. Flanged edge; 20. Frame; 30. Welding wire; 40. Connection hole; 50. Lifting part. DETAILED DESCRIPTION

[0014] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0015] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0017] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0018] like Figures 1 to 4 As shown, an embodiment of the battery device according to the present application includes a base plate 10 and a frame 20 provided on the side of the base plate 10. A storage space for accommodating batteries is formed in the base plate 10, and the batteries are placed on the base plate 10. The base plate 10 is a basin-shaped structure and includes a bottom surface 11 and a side surface 12. The edge of the side surface 12 is provided with a flange 13. The frame 20 is provided on the side of the side surface 12 away from the storage space, and the flange 13 is located above the frame 20. The frame 20 is provided with a cavity, and the top surface of the frame 20 is welded to the flange 13.

[0019] Using the technical solution of this embodiment, the base plate 10 is formed into a basin-shaped structure by stamping, so that the bottom surface 11, side surface 12 and flange 13 of the base plate 10 are integrally formed, thereby ensuring the sealing performance of the space inside the base plate 10. By providing a frame 20 on the side of the base plate 10, the strength of the basin-shaped base plate 10 is further enhanced. And by welding the flange 13 to the frame 20, the problem of welding failure at the bottom of the base plate 10 causing sealing failure is prevented, thereby further enhancing the strength and sealing performance of the base plate 10. Therefore, the technical solution of this embodiment solves the defects of the prior art that the battery pack box has many welding parts and the sealing performance cannot be guaranteed.

[0020] from Figure 1 and Figure 2 As can be seen, the bottom plate 10 is formed into a basin-shaped structure by stamping, and includes a bottom surface 11, side surfaces 12, and flanges 13. The bottom surface 11 is a flat plate, the side surfaces 12 are arranged at the edge of the bottom surface 11, and the side surfaces 12 and the bottom surface 11 form a predetermined angle, and the flanges 13 are arranged at the edge of the side surfaces 12 and are parallel (or approximately parallel) to the bottom surface 11.

[0021] In this embodiment, the bottom surface 11 and the side surface 12 are integrally formed without the need for welding, thereby ensuring the sealing performance of the space within the bottom plate 10 .

[0022] from Figure 4 It can be seen that in this embodiment, the side surface 12 and the bottom surface 11 are arranged at an obtuse angle. In some embodiments not shown, the side surface 12 and the bottom surface 11 can also be arranged at a right angle.

[0023] Furthermore, the frame 20 plays a role in reinforcing the structure of the bottom plate 10. The frame 20 is a long strip structure and has a cavity, so the frame 20 is a profile formed by extrusion.

[0024] from Figure 4It can be seen that the top surface of the frame 20 is connected to the flange 13 by welding, and the side of the frame 20 facing the side 12 is matched with the side 12. Since the side 12 and the flange 13 are arranged at an obtuse angle, the top surface of the frame 20 and the side facing the side 12 in this embodiment are also arranged at an obtuse angle, so that the shape of the frame 20 is more consistent with the shape of the base plate 10.

[0025] from Figure 4 It can also be seen that the bottom surface of the frame 20 is parallel to the top surface, and the side surface of the frame 20 away from the side surface 12 is perpendicular to the top surface and the bottom surface.

[0026] Furthermore, if Figure 4 As shown, the battery device further includes a top cover (not shown), which is provided on the bottom plate 10. A seal is provided on the flange 13, and the flange 13 is connected to the top cover, and the seal covers the welding line 30 between the frame 20 and the flange 13.

[0027] Specifically, the top cover is placed on the bottom plate 10, and the edge of the top cover cooperates with the flange 13. A seal is sandwiched between the edge of the top cover and the flange 13 to ensure the sealing performance between the top cover and the bottom plate 10.

[0028] Since the welding line 30 is a weak point in the structure and may cause airtightness problems, in this embodiment, a sealing member covers the welding line 30 to ensure the sealing of the accommodation space surrounded by the bottom plate 10 and the top cover.

[0029] Optionally, the sealing member is a sealing strip, and is an annular sealing strip.

[0030] like Figure 4 As shown, in the technical solution of this embodiment, a connecting hole 40 is provided on the flange 13, and the connecting hole is used to pass a fastener, which connects the bottom plate 10 and the top cover. The connecting hole 40 is staggered with the welding line 30.

[0031] Specifically, a plurality of connection holes 40 ( Figure 4 Only one is shown), the top cover is also provided with a plurality of connection holes, and by inserting fasteners into the connection holes 40, the bottom plate 10 and the top plate can be fixedly connected.

[0032] Alternatively, the fasteners may be bolts.

[0033] Furthermore, since the weld line 30 is a structurally weak location, the connection hole 40 is offset from the weld line 30 to prevent interference between the connection hole 40 and the weld line 30, thereby preventing airtightness problems. This also prevents the structural strength near the connection hole 40 from being low, preventing the flange 13 from being crushed during subsequent fastening.

[0034] like Figure 4As shown, in the technical solution of this embodiment, the distance d1 between the connection hole 40 and the welding wire 30 is in the range of 5 mm to 20 mm.

[0035] It should be noted that the distance d1 between the connection hole 40 and the welding wire 30 refers to the distance between the axis of the connection hole 40 and the edge of the welding wire 30 .

[0036] Specifically, the distance d1 between the connection hole 40 and the welding wire 30 cannot be too small. If d1 is too small, interference between the connection hole 40 and the welding wire 30 may occur, and the structural strength near the connection hole 40 may be low.

[0037] Specifically, the distance d1 between the connection hole 40 and the welding wire 30 cannot be too large. If d1 is too large, the width of the flange 13 will be larger, which will increase the space occupied by the battery device.

[0038] For example, the distance d1 between the connection hole 40 and the welding wire 30 can be selected as 5 mm, 8 mm, 10 mm, 12 mm, 15 mm, 20 mm, etc., or any value between the two values.

[0039] like Figure 4 As shown, in the technical solution of this embodiment, in the direction parallel to the bottom surface 11, the ratio of the thickness d2 of the frame 20 to the material thickness d3 of the bottom plate 10 is in the range of 10 to 100.

[0040] Specifically, the thickness d2 of the frame 20 refers to the thickness of the frame 20 at Figure 4 The material thickness d3 of the bottom plate 10 refers to the thickness of the plate material of the bottom plate 10 .

[0041] Furthermore, the smaller the thickness d3 of the base plate 10, the lower the strength of the base plate 10. In this case, the thickness d2 of the frame 20 needs to be appropriately increased to enhance the structural reinforcement provided by the frame 20 to the base plate 10. Conversely, the larger the thickness d3 of the base plate 10, the greater the strength of the base plate 10. In this case, the thickness of the frame 20 can be appropriately reduced, thereby reducing the space occupied by the battery device.

[0042] For example, the ratio of the thickness d2 of the frame 20 to the material thickness d3 of the base plate 10 can be selected as 10, 20, 50, 80 or 100, etc., and any value between the two values.

[0043] like Figure 4 As shown, in the technical solution of this embodiment, in the direction parallel to the bottom surface 11, the thickness d2 of the frame 20 is in the range of 25 mm to 100 mm.

[0044] Specifically, the thickness d2 of the frame 20 should be appropriately sized. The thickness d2 of the frame 20 should not be too large, as this would increase the space occupied by the battery assembly and increase costs. The thickness d2 of the frame 20 should not be too small, as this would weaken the structural reinforcement provided by the frame 20 to the base plate 10.

[0045] For example, the thickness d2 of the frame 20 can be selected as 25 mm, 30 mm, 50 mm, 70 mm, 90 mm or 100 mm, etc., and any value between the two values.

[0046] like Figure 4 As shown, in the technical solution of this embodiment, the material thickness d3 of the base plate 10 is in the range of 1.0 mm to 2.5 mm.

[0047] Specifically, the thickness d3 of the side bottom plate 10 should be appropriately selected. The thickness d3 of the bottom plate 10 should not be too large. If d3 is too large, the bottom plate 10 will occupy a larger portion of the storage space, reducing the battery device's energy density and increasing its weight. The thickness d3 of the bottom plate 10 should not be too small. If d3 is too small, the structural strength of the bottom plate 10 will be significantly reduced, making it susceptible to damage during use.

[0048] For example, the material thickness d3 of the base plate 10 can be selected to be 1.0 mm, 1.5 mm, 2 mm, 2.5 mm, etc., and any value between the two values.

[0049] like Figure 4 As shown, in the technical solution of this embodiment, the bottom surface 11 and the side surface 12 have a preset angle, and the preset angle is in the range of 90° to 135°.

[0050] Specifically, the preset angle between the bottom surface 11 and the side surface 12 should be appropriately sized. If the preset angle is too large, the side surface 12 will be too tilted relative to the bottom surface 11, reducing the height of the battery assembly, resulting in insufficient utilization of the storage space and reduced energy density. If the preset angle is too small, the bottom plate 10 will bend too much during stamping and bending, which can easily damage the structure of the bottom plate 10.

[0051] For example, the preset angle between the bottom surface 11 and the side surface 12 can be selected as 90°, 100°, 120°, 130°, 135°, etc., and any value between the two values.

[0052] like Figure 4 As shown, in the technical solution of this embodiment, the side surface 12 and the frame 20 are connected by bonding.

[0053] Specifically, glue is filled between the side surface 12 and the frame 20 , so that the frame 20 is firmly fixed to the side position of the bottom plate 10 , thereby strengthening the structural support function of the frame 20 on the bottom plate 10 .

[0054] In some embodiments not shown, the side surface 12 and the frame 20 may also be connected by welding, fastener connection, or the like.

[0055] like Figure 3 and Figure 4 As shown, in the technical solution of this embodiment, a hanging portion 50 is provided on the side of the frame 20 away from the side surface 12. The hanging portion 50 is integrally formed with the frame 20 and is used to connect the battery device to the vehicle frame.

[0056] Furthermore, in a direction parallel to the bottom surface 11 , a ratio of a width d4 of the flange 13 to a width d5 ​​of the hanging portion 50 is in a range of 0.12 to 2.5.

[0057] Specifically, the hanging portion 50 is provided on a surface of the frame 20 away from the side surface 12, and the hanging portion 50 protrudes from the surface and is located on the upper side of the frame 20. The hanging portion 50 is provided with a plurality of through holes for inserting fasteners, thereby achieving hanging of the battery device on the vehicle frame.

[0058] Furthermore, the width d4 of the flange 13 refers to the width of the flange 13 at Figure 4 The width d5 ​​of the hanging part 50 in the left and right directions is the width of the hanging part 50 in the left and right directions. Figure 4 The left-right dimensions of the displayed content.

[0059] Furthermore, if the width d5 ​​of the hanging portion 50 is wider, the connection strength between the flange 13 and the frame 20 needs to be greater, and therefore the width d4 of the flange 13 needs to be increased accordingly to ensure sufficient connection area between the flange 13 and the frame 20. Conversely, if the width d5 ​​of the hanging portion 50 is smaller, the connection strength between the flange 13 and the frame 20 is relatively weak, and therefore the width d4 of the flange 13 can be relatively reduced, thereby reducing the space occupied by the battery device.

[0060] For example, the ratio of the width d4 of the flange 13 to the width d5 ​​of the hanging portion 50 can be selected as 0.12, 0.18, 0.2, 0.22 or 0.25, etc., and any value between the two values.

[0061] Optionally, the width d4 of the flange 13 is in the range of 20 mm to 50 mm.

[0062] For example, the width d4 of the flange 13 can be selected to be 20 mm, 30 mm, 40 mm, 50 mm, etc., or any value between the two values.

[0063] Optionally, the width d5 ​​of the mounting portion 50 is in the range of 20 mm to 150 mm.

[0064] For example, the width d5 ​​of the mounting portion 50 can be selected to be 20 mm, 50 mm, 100 mm, or 150 mm, etc., or any value between the two values.

[0065] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A battery device, characterized in that: The invention comprises a bottom plate (10) and a frame (20) arranged on the side of the bottom plate (10), wherein a storage space for accommodating batteries is formed in the bottom plate, and the batteries are placed on the bottom plate (10), the bottom plate (10) comprises a bottom surface (11) and a side surface (12), the edge of the side surface (12) is provided with a flange (13), the frame (20) is provided on the side of the side surface (12) away from the storage space, and the flange (13) is located above the frame (20), the frame (20) is provided with a cavity, and the top surface of the frame (20) is welded to the flange (13).

2. The battery device according to claim 1, wherein: The bottom surface (11) and the side surface (12) have a preset angle, and the preset angle is in the range of 90° to 135°.

3. The battery device according to claim 1, wherein: The side surface (12) and the frame (20) are connected by bonding.

4. The battery device according to claim 1, wherein: A hanging portion (50) is provided on a side of the frame (20) away from the side surface (12), the hanging portion (50) and the frame (20) being integrally formed, the hanging portion (50) being used to connect the battery device to the vehicle frame, and a ratio of a width (d4) of the flange (13) to a width (d5) of the hanging portion (50) in a direction parallel to the bottom surface (11) is in a range of 0.12 to 2.

5.

5. The battery device according to claim 1, wherein: The battery device further comprises a top cover, the top cover being arranged on the bottom plate (10), a sealing member being arranged on the flange (13), and the flange (13) being connected to the top cover, and the sealing member covering a welding line (30) at a welding position between the frame (20) and the flange (13).

6. The battery device according to claim 5, characterized in that The flange (13) and the top cover are provided with connection holes (40), the connection holes are used to pass fasteners, the fasteners connect the bottom plate (10) and the top cover, and the connection holes (40) are staggered with the welding line (30).

7. The battery device according to claim 6, characterized in that The distance (d1) between the center of the connection hole (40) and the welding line (30) is in the range of 5 mm to 20 mm.

8. The battery device according to claim 6, characterized in that In a direction parallel to the bottom surface (11), a ratio of a thickness (d2) of the frame (20) to a material thickness (d3) of the bottom plate (10) is in a range of 10 to 100.

9. The battery device according to claim 8, characterized in that In a direction parallel to the bottom surface (11), the thickness (d2) of the frame (20) is in the range of 25 mm to 100 mm.

10. The battery device according to claim 8, characterized in that The material thickness (d3) of the base plate (10) is in the range of 1.0 mm to 2.5 mm.

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