Battery box and battery pack

Abstract

The utility model discloses a battery box and a battery pack. The battery box comprises a box main body; the bottom protection plate is arranged in a flat plate shape, and the bottom protection plate and the box body are arranged in a spaced mode to form a suspension part; and the connecting assembly is arranged on the suspension part, and the box body main body and the bottom protection plate are both connected with the connecting assembly, so that the bottom protection plate is locked and attached to the box body main body. According to the utility model, the flat-plate-shaped bottom protection plate and the box main body are connected through the connecting assembly, so that the flat-plate-shaped bottom protection plate can be locked and attached to the box main body, and the bottom protection plate does not need to be modeled complexly; in addition, direct suspension between the bottom protection plate and the box body can be avoided, and the fixing mode of the bottom protection plate and the box body is optimized.

Description

Technical Field

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

[0002] As the capacity of batteries increases, their safety protection performance is also receiving more and more attention, especially for battery boxes equipped with multiple batteries. Currently, mainstream battery boxes mainly rely on bottom guard plates to prevent collisions, bottom scratches, and external ball hits, making the bottom guard plate crucial to the safety of the battery box. However, in the prior art, the bottom guard plate needs to be molded and processed to form a complex shape during design in order to form an effective lock with the battery box, and it is generally made of pure steel plates, which are heavy and have weak corrosion resistance, resulting in high manufacturing costs and after-sales maintenance costs for the bottom guard plate.

[0003] At present, a flat composite bottom guard plate has appeared on the market, which has the characteristics of strong corrosion resistance, light weight and low cost. However, the flat composite bottom guard plate cannot have a shape, resulting in the bottom guard plate and the battery box being directly suspended in the air, resulting in the inability to form a reliable fixation between the bottom guard plate and the battery box. Utility Model Content

[0004] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a battery box, which can avoid the formation of suspension between the bottom guard plate arranged in a flat shape and the box body, and optimize the fixing method of the bottom guard plate and the box body.

[0005] A battery box according to an embodiment of the utility model includes: a box body; a bottom guard plate, which is arranged in a flat plate shape and is spaced apart from the box body to form a suspended portion; a connecting component, which is arranged in the suspended portion, and the box body and the bottom guard plate are both connected to the connecting component so that the bottom guard plate is locked to the box body.

[0006] In the present battery box, the connecting component is connected to the suspended portion formed by the bottom guard plate arranged in a flat plate shape and the box body, which can effectively avoid direct suspension between the bottom guard plate and the box body, so that the bottom guard plate arranged in a flat plate shape can be reliably locked to the box body through the connecting component, thereby optimizing the fixing method of the bottom guard plate and the box body.

[0007] According to some embodiments of the present invention, the box body includes a liquid cooling plate and a box frame, the box frame is fixedly connected to a side of the liquid cooling plate away from the bottom guard plate, and the connecting assembly is connected between the liquid cooling plate and the bottom guard plate.

[0008] According to some embodiments of the utility model, the connection component includes a plurality of first assembly brackets connected to the box body, the first assembly brackets are provided with a first connection portion protruding toward the bottom guard plate, and the first connection portion is connected to the bottom guard plate.

[0009] According to some embodiments of the utility model, the bottom guard plate is provided with a plurality of first assembly holes, first fasteners are mounted in the first assembly holes, and the first fasteners are connected to the first connecting portion.

[0010] According to some embodiments of the present invention, a first rivet nut is further included, wherein the first rivet nut is assembled on the first connecting portion, and the first fastener is connected to the first rivet nut.

[0011] According to some embodiments of the present invention, the connection assembly includes a plurality of bushings connected to the bottom guard plate, a second fastener is installed in the bushing, and the second fastener is connected to the liquid cooling plate.

[0012] According to some embodiments of the utility model, the liquid cooling plate is provided with a plurality of second assembly holes, second rivet nuts are mounted in the second assembly holes, and the second fasteners are connected to the second rivet nuts.

[0013] According to some embodiments of the utility model, a third assembly hole is opened on the box frame, and the rod portion of the second rivet nut extends into the third assembly hole.

[0014] According to some embodiments of the present invention, the bottom guard plate includes a first composite layer and a second composite layer, and a steel plate layer is arranged between the first composite layer and the second composite layer.

[0015] According to the same inventive concept, the utility model also proposes a battery pack, including the battery box as described above.

[0016] In summary, the battery box provided by the utility model has the following technical effects:

[0017] By connecting the connecting component to the suspended portion formed by the flat-plate-shaped bottom guard plate and the box body, direct suspension between the bottom guard plate and the box body can be effectively avoided, so that the flat-plate-shaped bottom guard plate can be reliably locked to the box body through the connecting component, thereby optimizing the fixing method of the bottom guard plate and the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the battery box of the first embodiment of the utility model;

[0019] Figure 2 for Figure 1A magnified schematic diagram of region A;

[0020] Figure 3 This is a schematic structural diagram of a liquid cooling plate according to Embodiment 1 of the present utility model;

[0021] Figure 4 This is a schematic diagram of the structure of a battery box according to Embodiment 2 of the present utility model;

[0022] Figure 5 for Figure 4 A magnified schematic diagram of region B;

[0023] Figure 6 This is a schematic diagram of the structure of a battery box according to Embodiment 3 of the present utility model;

[0024] Figure 7 for Figure 6 Schematic diagram of the enlarged C region;

[0025] Figure 8 This is another structural schematic diagram of the battery box of the third embodiment of the utility model;

[0026] Fig. 9 This is a schematic diagram of the structure of the liquid cooling plate of the third embodiment of the present utility model;

[0027] Fig.10 This is a schematic diagram of the structure of the bushing in Embodiment 3 of the present utility model;

[0028] Fig.11 It is a structural schematic diagram of the bottom guard plate of the utility model.

[0029] The meanings of the reference numerals are as follows:

[0030] 1. Box body; 11. Liquid cooling plate; 111. Second assembly hole; 112. Second rivet nut; 12. Box frame; 2. Bottom guard plate; 21. First assembly hole; 22. First fastener; 23. First composite layer; 24. Second composite layer; 25. Steel plate layer; 3. Connecting assembly; 31. First assembly bracket; 311. First connecting part; 312. First rivet nut; 32. Bushing; 321. Second fastener. DETAILED DESCRIPTION

[0031] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0034] Embodiment 1:

[0035] See also Figure 1 , Figure 2 and Figure 3 In this embodiment, a battery box is disclosed, the battery box includes a box body 1, a bottom guard plate 2 and a connecting component 3. In some embodiments, the bottom guard plate 2 is arranged in a flat plate shape, and the bottom guard plate 2 is arranged at a distance from the box body 1 to form a suspended portion; the connecting component 3 is arranged in the suspended portion, and the box body 1 and the bottom guard plate 2 are both connected to the connecting component 3, so that the bottom guard plate 2 is locked to the box body 1. Optionally, the bottom guard plate 2 can be locked to any side of the box body 1 according to actual conditions; preferably, by connecting the connecting component 3 to the suspended portion formed by the bottom guard plate 2 arranged in a flat plate shape and the box body 1, it is possible to effectively avoid direct suspension between the bottom guard plate 2 and the box body 1, so that the bottom guard plate 2 arranged in a flat plate shape can be reliably locked to the box body 1 through the connecting component, thereby optimizing the fixing method of the bottom guard plate 2 and the box body 1.

[0036] See also Fig.11In this embodiment, the bottom guard plate 2 includes a first composite layer 23 and a second composite layer 24, and a steel plate layer 25 is arranged between the first composite layer 23 and the second composite layer 24. Optionally, the first composite layer 23 and the second composite layer 24 are made of thermoplastic composite materials, preferably, PP continuous glass fiber material; Optionally, the first composite layer 23 is bonded to one side end surface of the steel plate layer 25, and the second composite layer 24 is bonded to the other side end surface of the steel plate layer 25; Optionally, the steel plate layer 25 is completely wrapped between the first composite layer 23 and the second composite layer 24 to improve the anti-corrosion ability of the bottom guard plate 2, and the bottom guard plate 2 in this embodiment is composed of the first composite layer 23, the steel plate layer 25 and the second composite layer 24, so that the weight of the bottom guard plate 2 in this embodiment is lighter than that of the bottom guard plate 2 of the same thickness and / or strength made of pure steel and the production cost is lower.

[0037] See also Figure 1 and Figure 2 In this embodiment, the box body 1 includes a liquid cooling plate 11 and a box frame 12, the box frame 12 is fixedly connected to the side of the liquid cooling plate 11 away from the bottom guard plate 2, and the connecting component 3 is arranged between the liquid cooling plate 11 and the bottom guard plate 2. Optionally, the box frame 12 is formed by a combination of a plurality of longitudinal beams and a plurality of transverse beams; optionally, the box frame 12 and the liquid cooling plate 11 can be fixedly connected by welding, bolting, riveting, etc.; optionally, the box frame 12 is fixedly connected to one side of the liquid cooling plate 11 and forms at least one chamber; the connecting component 3 is arranged on the other side of the liquid cooling plate 11, so that the bottom guard plate 2 is connected to the liquid cooling plate 11 through the connecting component 3, so as to be assembled on the outside of the liquid cooling plate 11, so as to protect the liquid cooling plate 11, and effectively avoid the damage to the liquid cooling plate 11 or the box body 1 by the bottoming, external ball hitting, etc.

[0038] See also Figure 2 and Figure 3In this embodiment, the connection component 3 includes a plurality of first assembly brackets 31 connected to the box body 1, and the first assembly bracket 31 is provided with a first connection portion 311 protruding toward the bottom guard plate 2, and the first connection portion 311 is connected to the bottom guard plate 2. Preferably, the first assembly brackets 31 are distributed on one side of the box body 1 close to the bottom guard plate 2. Optionally, one end of the first assembly bracket 31 can be fixedly connected to the box body 1 by welding, bolting, riveting, etc., and the other end of the first assembly bracket 31 protrudes toward the bottom guard plate 2 to form the first connection portion 311, which is connected to the bottom guard plate 2 arranged in a flat plate shape through the protruding first connection portion 311, and can avoid the formation of overhang between the bottom guard plate 2 arranged in a flat plate shape and the box body 1, so that the bottom guard plate 2 can be fixed to the box body 1 without complicated shaping, thereby optimizing the bottom guard plate 2. The fixing method of the plate 2 and the box body 1, wherein the first assembly bracket 31 can be columnar, conical, etc.; preferably, both ends of the first assembly bracket 31 are fixedly connected to the box body 1, and the middle part of the first assembly bracket 31 protrudes toward the bottom guard plate 2 to form the first connecting portion 311, that is, the first assembly bracket 31 is set in a U shape as a whole to ensure that the first assembly bracket 31 can have a sufficiently large contact area with the box body 1 to form a firm connection, and is connected to the bottom guard plate 2 set in a flat plate shape through the protruding first connecting portion 311, so that the bottom guard plate 2 can be fixed to the box body 1 without complicated shaping. The bottom guard plate 2 is arranged in a flat plate shape and is connected to the box body 1 through the connecting component 3. The bottom guard plate 2 is arranged in a flat plate shape and is connected to the box body 1 through the connecting component 3. The bottom guard plate 2 is arranged in a flat plate shape and is connected to the box body 1 through the connecting component 3. The bottom guard plate 2 is arranged in a flat plate shape and is connected to the box body 1 through the connecting component 3. The bottom guard plate 2 is arranged in a flat plate shape and is connected to the box body 12 and the liquid cooling plate 1 ... The bottom guard plate 2 which is arranged in a flat plate shape is reliably locked to the box body 1; optionally, the first assembly bracket 31 can be distributed on one side surface of the liquid cooling plate 11 close to the bottom guard plate 2. Optionally, the box frame 12, the liquid cooling plate 11 and the bottom guard plate 2 are arranged in sequence along the height direction, and the bottom guard plate 2 which is arranged in a flat plate shape is connected to the first connecting portion 311 of the first assembly bracket 31, so that the bottom guard plate 2 which is arranged in a flat plate shape is connected to the liquid cooling plate 11, which can effectively avoid the formation of suspension between the bottom guard plate 2 and the liquid cooling plate 11, thereby realizing that the bottom guard plate 2 which is arranged in a flat plate shape is reliably locked to the box body 1.

[0039] See also Figure 2 In this embodiment, the bottom guard plate 2 is provided with a plurality of first assembly holes 21, and the first fasteners 22 are assembled in the first assembly holes 21, and the first fasteners 22 are connected to the first connection portion 311. Optionally, the first fasteners 22 may be rivets. When assembling the bottom guard plate 2, the bottom guard plate 2 is stacked on the bottom of the box body 1, and the bottom guard plate 2 is driven to abut against the raised first connection portion 311, so that the bottom guard plate 2 arranged in a flat plate shape and the box body 1 can be prevented from being suspended. Then, the first fasteners 22 are riveted to the first connection portion 311, so that the bottom guard plate 2 arranged in a flat plate shape is fixed to the raised first connection portion 311, so that the bottom guard plate 2 arranged in a flat plate shape can be reliably locked to the box body 1, thereby optimizing the fixing method of the bottom guard plate 2 and the box body 1. Optionally, the first connecting portion 311 may be further provided with a threaded hole matching the first fastener 22, and the first fastener 22 is a bolt or a screw. When assembling the bottom guard plate 2, the bottom guard plate 2 is stacked on the bottom of the box body 1, and the bottom guard plate 2 is driven to abut against the raised first connecting portion 311, which can avoid the bottom guard plate 2 arranged in a flat plate shape and the box body 1 from being suspended. The first fastener 22 is then threadedly connected to the first connecting portion 311, so that the bottom guard plate 2 arranged in a flat plate shape is fixed to the raised first connecting portion 311, thereby optimizing the fixing method of the bottom guard plate 2 and the box body 1.

[0040] Embodiment 2:

[0041] See also Figure 4 and Figure 5, the difference between this embodiment and the first embodiment is that it also includes a first rivet nut 312, the first rivet nut 312 is assembled on the first connection part 311, and the first fastener 22 passes through the second assembly hole 111 and is connected to the first rivet nut 312. Preferably, both sides of the first assembly bracket 31 are fixedly connected to the box body 1, and the middle part of the first assembly bracket 31 protrudes toward the bottom guard plate 2 to form the first connection part 311, that is, the first assembly bracket 31 is arranged in a U-shape as a whole to ensure that the first assembly bracket 31 can have a sufficiently large contact area with the box body 1 to form a firm connection. Further, the first rivet nut 312 is arranged on the side of the first connection part 311 away from the bottom guard plate 2, and optionally, the middle part of the first assembly bracket 31 protrudes toward the bottom guard plate 2 to form the first connection part 311, so that the first connection part 311 is formed on the side away from the bottom guard plate 2 to form a cavity, and the first rivet nut 312 is arranged in the cavity, thereby making full use of the space. Preferably, the first fastener 22 is a bolt. When assembling the bottom guard plate 2, the flat-plate-shaped bottom guard plate 2 is stacked on the bottom of the box body 1, and the flat-plate-shaped bottom guard plate 2 is driven to abut against the raised first connecting portion 311, which can avoid suspension between the flat-plate-shaped bottom guard plate 2 and the box body 1. Then, the first fastener 22 is driven to pass through the first assembly hole 21 and the second assembly hole 111 in sequence and be threadedly connected with the first rivet nut 312, so that the raised first connecting portion 311 is fixedly connected to the flat-plate-shaped bottom guard plate 2, thereby achieving the reliable locking of the flat-plate-shaped bottom guard plate 2 to the box body 1.

[0042] Embodiment three:

[0043] See also Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10The difference between this embodiment and the first or second embodiment is that the first assembly bracket 31 does not need to be fixedly connected to the box body 1. Specifically, the connection assembly 3 includes a plurality of bushings 32 connected to the bottom guard plate 2, and the bushings 32 are equipped with the second fasteners 321, and the second fasteners 321 are connected to the liquid cooling plate 11. That is, the action of the second fastener 321 directly acts on the bushing 32, thereby preventing the second fastener 321 from directly compressing the bottom guard plate 2, and achieving higher safety and reliability; optionally, the bushing 32 is a steel bushing 32; optionally, when assembling the bottom guard plate 2, the flat bottom guard plate 2 is stacked on the bottom of the box body 1, driving the end of the bushing 32 away from the bottom guard plate 2 to abut against the liquid cooling plate 11, thereby preventing the bottom guard plate 2 from being suspended from the box body 1, and then the second fastener 321 assembled in the bushing 32 is connected to the liquid cooling plate 11, so that the flat bottom guard plate 2 can be reliably locked on the liquid cooling plate 11, thereby optimizing the fixing method of the bottom guard plate 2 and the box body 1. The bushing 32 and the bottom guard plate 2 can be connected by welding, bolting, bonding, clamping, etc.

[0044] See also Figure 7 and Fig. 9 In this embodiment, the liquid cooling plate 11 is provided with a plurality of second assembly holes 111, in which second rivet nuts 112 are assembled, and the second fasteners 321 are connected to the second rivet nuts 112. Optionally, the second fasteners 321 are bolts. Specifically, when the second fasteners 321 are tightened, the second rivet nuts 112 are deformed synchronously and are riveted to the liquid cooling plate 11, and at the same time, the second fasteners 321 drive the bottom guard plate 2 arranged in a flat plate shape to be fixedly connected to the second rivet nuts 112, so that the bottom guard plate 2 arranged in a flat plate shape is connected to the box body 1 through the connection between the second fasteners 321 and the second rivet nuts 112, and the bottom guard plate 2 arranged in a flat plate shape is abutted against the liquid cooling plate 11 through the bushings 32, so that the bottom guard plate 2 and the box body 1 can be prevented from being suspended.

[0045] See also Figure 7 , Figure 8 and Fig. 9In this embodiment, a third assembly hole is opened on the box frame 12, and the rod portion of the second rivet nut 112 extends into the third assembly hole. Specifically, when the second fastener 321 is tightened, the second rivet nut 112 is deformed, so that the second rivet nut 112, the liquid cooling plate 11 and the box frame 12 are riveted into a fastened whole, and at the same time, the second fastener 321 drives the flat-plate-shaped bottom guard plate 2 to be fixedly connected with the second rivet nut 112, so that the flat-plate-shaped bottom guard plate 2 is connected to the box body 1 through the connection between the second fastener 321 and the second rivet nut 112, and the flat-plate-shaped bottom guard plate 2 is abutted against the liquid cooling plate 11 through the bushing 32, which can avoid the bottom guard plate 2 and the box body 1 from being suspended in the air, so that the flat-plate-shaped bottom guard plate 2 can be reliably locked to the box body 1, thereby fully optimizing the fixing method of the bottom guard plate 2 and the box body 1, effectively reducing the number of fasteners, and reducing production costs.

[0046] See also Figure 7 , Figure 8 , Fig. 9 and Fig.10 Preferably, one end of the bushing 32 passes through the bottom guard plate 2 and is fixedly connected to the bottom guard plate 2, and the other end of the bushing 32 extends toward the liquid cooling plate 11. Optionally, the rod of the second rivet nut 112 passes through the second assembly hole 111 and the third assembly hole in sequence, and the flange of the second rivet nut 112 abuts against the side of the liquid cooling plate 11 close to the bottom guard plate 2. Optionally, the second fastener 321 can be a bolt, and the rod of the second fastener 321 can pass through the bushing 32 and be connected to the second rivet nut 112. When assembling the bottom guard plate 2, the flat-plate-shaped bottom guard plate 2 is stacked on the bottom of the box body 1, and the other end of the bushing 32 is driven to abut against the liquid cooling plate 11, which can avoid the flat-plate-shaped bottom guard plate 2 from being attached. There is a suspension between the guard plate 2 and the box body 1, and then the second fastener 321 assembled on the bushing 32 is threadedly connected with the second rivet nut 112, driving the rod of the second rivet nut 112 to deform, so that the second rivet nut 112, the liquid cooling plate 11 and the box frame 12 are riveted into a fastened whole, and at the same time, the second fastener 321 drives the flat-plate-shaped bottom guard plate 2 to be fixedly connected with the second rivet nut 112, thereby realizing the connection between the second fastener 321 and the second rivet nut 112, driving the flat-plate-shaped bottom guard plate 2 to be reliably locked on the box body 1, thereby optimizing the fixing method of the bottom guard plate 2 and the box body 1, effectively reducing the number of fasteners, and reducing production costs.

[0047] Embodiment 4:

[0048] A battery pack comprises a battery box as described in any of the above embodiments.

[0049] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A battery box, characterized in that: include: Box body (1); A bottom guard plate (2), the bottom guard plate (2) being arranged in a flat plate shape, and the bottom guard plate (2) and the box body (1) are arranged at a distance to form a suspended portion; A connecting component (3), wherein the connecting component (3) is arranged on the suspended portion, and the box body (1) and the bottom guard plate (2) are both connected to the connecting component (3) so that the bottom guard plate (2) is locked to the box body (1).

2. The battery box according to claim 1, characterized in that: The box body (1) comprises a liquid cooling plate (11) and a box frame (12); the box frame (12) is fixedly connected to a side of the liquid cooling plate (11) away from the bottom guard plate (2); and the connecting assembly (3) is connected between the liquid cooling plate (11) and the bottom guard plate (2).

3. The battery box according to claim 1 or 2, characterized in that: The connection assembly (3) comprises a plurality of first assembly brackets (31) connected to the box body (1), the first assembly brackets (31) being provided with first connection portions (311) protruding in the direction of the bottom guard plate (2), the first connection portions (311) being connected to the bottom guard plate (2).

4. The battery box according to claim 3, characterized in that: The bottom guard plate (2) is provided with a plurality of first assembly holes (21), a first fastener (22) is mounted in each of the first assembly holes (21), and the first fastener (22) is connected to the first connection portion (311).

5. The battery box according to claim 4, characterized in that: It also includes a first rivet nut (312), wherein the first rivet nut (312) is assembled on the first connecting portion (311), and the first fastener (22) is connected to the first rivet nut (312).

6. The battery box according to claim 2, characterized in that: The connection assembly (3) comprises a plurality of bushings (32) connected to the bottom guard plate (2), a second fastener (321) being mounted in the bushing (32), and the second fastener (321) being connected to the liquid cooling plate (11).

7. The battery box according to claim 6, characterized in that: The liquid cooling plate (11) is provided with a plurality of second assembly holes (111), second rivet nuts (112) are assembled in the second assembly holes (111), and the second fastener (321) is connected to the second rivet nuts (112).

8. The battery box according to claim 7, characterized in that: A third assembly hole is provided on the box frame (12), and the rod portion of the second rivet nut (112) extends into the third assembly hole.

9. The battery box according to claim 1, characterized in that: The bottom guard plate (2) comprises a first composite layer (23) and a second composite layer (24), and a steel plate layer (25) is provided between the first composite layer (23) and the second composite layer (24).

10. A battery pack, characterized in that: Comprising a battery box as described in any one of claims 1-9.

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