Battery pack case, battery pack and working machine

Abstract

The utility model relates to the technical field of mechanical equipment, and provides a battery pack shell, a battery pack and an operation machine. The battery pack shell comprises a shell body and a first reinforcing piece, a containing cavity is formed in the shell body, and the shell body is integrally formed by stamping a metal plate; the first reinforcer is arranged on the shell body, and the first reinforcer is used for enhancing the strength of the shell body. The battery pack shell solves the problem that an existing battery pack shell is large in weight, the battery pack shell is light in weight and large in strength, and the safety performance of a battery pack is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, and in particular to a battery pack shell, a battery pack and an operating machine. Background Art

[0002] As the concept of clean energy penetrates into all walks of life, the application of batteries in various industries is becoming more and more extensive. At present, all kinds of machinery cannot work without batteries, so batteries are necessary components for the normal operation of all kinds of machinery. And battery packs are a common form of battery application.

[0003] At present, the shells of some battery packs are made of cast aluminum, profiles and skins, etc. This type of battery pack has the disadvantage of being heavy and will increase the weight of the operating machinery. Although the shells of other battery packs are lighter, they have the disadvantage of being less strong. Therefore, it is particularly important to design a battery pack shell that is both light and strong. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the related art. To this end, the utility model proposes a battery pack shell, which is used to solve the problem of heavy weight of the existing battery pack shell, and realizes a battery pack shell that is light in weight and has great strength.

[0005] The utility model provides a battery pack shell, comprising a shell body and a first reinforcement member. The shell body has a cavity inside, and the shell body is integrally formed by sheet metal stamping; the first reinforcement member is arranged on the shell body, and the first reinforcement member is used to enhance the strength of the shell body.

[0006] According to a battery pack shell provided by the utility model, an opening is provided at the top of the shell body, and the opening is provided with a flange; a plurality of first reinforcement members are provided, some of the first reinforcement members are provided at the connection between the bottom wall and the side wall of the shell body, and another part of the first reinforcement members are provided at the connection between the flange and the side wall.

[0007] According to a battery pack shell provided by the utility model, the first reinforcement includes a first side wing and a second side wing, and the first side wing and the second side wing are fixedly connected at an angle; one of the first side wing and the second side wing is connected to the side wall, and the other of the first side wing and the second side wing is connected to the bottom wall or the flange.

[0008] According to a battery pack shell provided by the utility model, the first reinforcement is provided with a plurality of protrusions at intervals, and the protrusions are located at the connection between the first side wing and the second side wing.

[0009] According to a battery pack shell provided by the utility model, the shell body is provided with a plurality of connectors at intervals, and the connectors are used to connect different battery pack shells.

[0010] According to a battery pack shell provided by the utility model, the battery pack shell further includes a second reinforcement member, and the second reinforcement member is arranged along the width direction of the shell body.

[0011] According to a battery pack shell provided by the utility model, a plurality of module mounting beams are provided at intervals on the bottom wall of the cavity, and the module mounting beams are used to install the battery module.

[0012] According to a battery pack shell provided by the utility model, end plate supports are provided at both ends of the shell body.

[0013] The utility model also provides a battery pack, comprising a battery pack shell, a battery module and a shell cover as described in any one of the above embodiments. The battery module is arranged in the cavity; the shell cover is arranged at the top of the battery pack shell to close the battery pack shell.

[0014] The utility model also provides a working machine, comprising the battery pack as described in the above embodiment.

[0015] The battery pack shell provided by the utility model is provided with a shell body formed by sheet metal stamping, thereby greatly reducing the weight of the battery pack shell of the utility model, making the utility model more lightweight. At the same time, the utility model also provides a first reinforcement member on the shell body, thereby making the utility model have greater strength while having the advantage of being lighter.

[0016] Furthermore, the battery pack provided by the utility model can be assembled by stacking multiple battery pack shells with battery modules installed in layers, and then sealing the topmost battery pack shell with a shell cover, so that the utility model can be assembled into battery packs with different capacities.

[0017] In the working machines provided by the present invention, since they all have the battery pack housing and the battery pack as described above, they also have the various advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1It is a structural schematic diagram of the battery pack shell provided by the utility model.

[0020] Figure 2 yes Figure 1 Enlarged view of point A in .

[0021] Figure 3 It is a schematic diagram of the structure of multiple battery pack shells stacked and assembled according to the utility model.

[0022] Figure numerals: 100: shell body; 200: first reinforcement member; 210: protrusion; 300: second reinforcement member; 400: rib plate; 500: connecting member; 600: end plate support; 700: module mounting beam. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "first" and "second" are numbered for the purpose of clearly explaining the product components and do not represent any substantial difference. The directions of "upper" and "lower" shall be based on the directions shown in the accompanying drawings. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to the specific circumstances. In addition, the meaning of "multiple" is two or more. In the specification, "and / or" means at least one of the connected objects, and the character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Figure 1 The schematic diagram of the structure of the battery pack housing provided by the embodiment of the utility model is illustrated; Figure 2 Example Figure 1 Enlarged view of point A in .

[0027] Reference Figure 1 and Figure 2 The battery pack shell provided by the embodiment of the utility model includes a shell body 100 and a first reinforcement member 200. The shell body 100 has a cavity inside, and the shell body 100 is integrally formed by sheet metal stamping; the first reinforcement member 200 is arranged on the shell body 100, and the first reinforcement member 200 is used to enhance the strength of the shell body 100.

[0028] In the above structure, the shell body 100 formed in one piece by sheet metal stamping can realize automated, high-precision and high-accuracy manufacturing, greatly improving production efficiency. At the same time, since it is formed in one piece, the structure of the shell body 100 will be more compact, reducing the errors that may occur during the assembly process, and ensuring the uniformity of the quality and size of the shell body 100. In addition, this molding method also makes the shell body 100 have better integrity and sealing, which can effectively prevent the intrusion of external substances such as water and dust, and ensure the safety and stability of the battery pack. Therefore, compared with traditional battery pack shells that mainly adopt cast aluminum, profiles and skins, the utility model has the advantages of lighter weight, lower cost, and greater production capacity.

[0029] The provision of the first reinforcement 200 can significantly enhance the strength of the shell body 100 and improve the impact and pressure resistance of the battery pack shell. During the driving of the operating machine, the battery pack may be subjected to impact and vibration from the road surface, and the provision of the first reinforcement 200 can effectively absorb and disperse these impact forces, protecting the internal structure and battery cells of the battery pack from damage. At the same time, the first reinforcement 200 can also prevent the battery pack from deformation or rupture when subjected to side or top pressure, so that the battery pack has greater strength, further improving the safety performance of the battery pack.

[0030] Reference Figure 1 and Figure 2 In some embodiments of the present invention, the shell body 100 has an opening at the top, and a flange is provided at the opening; a plurality of first reinforcement members 200 are provided, some of which are provided at the connection between the bottom wall and the side wall of the shell body 100, and the other first reinforcement members 200 are provided at the connection between the flange and the side wall. The first reinforcement member 200 can be welded to the shell body 100 by resistance spot welding, or by MAG welding (Metal Active Gas Arc Welding).

[0031] Specifically, the shell body 100 can be a rectangular parallelepiped structure with an opening at the top, and the middle of the rectangular parallelepiped constitutes a cavity for accommodating the battery module. It should also be noted that the flange at the top opening of the shell body 100 can be an inner flange or an outer flange, or it can have both inner flange and outer flange, and the specific design can be based on actual conditions. The inner flange here can be understood as a flange extending from the side wall of the shell body 100 to the inside of the cavity, and the outer flange can be understood as an extension from the side wall of the shell body 100 to the outside of the cavity.

[0032] Since the shell body 100 is a rectangular parallelepiped structure, the strength of the connection between the bottom wall and the side wall is relatively low and is prone to deformation. In this embodiment, a first reinforcement 200 is provided at the connection between the bottom wall and the side wall of the shell body 100, and a first reinforcement 200 is provided at the connection between the flange at the top opening and the side wall of the shell body 100, thereby enhancing the strength of the entire battery pack shell.

[0033] Reference Figure 2 In some embodiments of the utility model, the first reinforcement 200 includes a first side wing and a second side wing, and the first side wing and the second side wing are fixedly connected at an angle; one of the first side wing and the second side wing is connected to the side wall, and the other of the first side wing and the second side wing is connected to the bottom wall or the flange.

[0034] It can be understood that when the first reinforcement 200 is connected to the bottom wall and the side wall of the shell body 100, one of the first side wing and the second side wing of the first reinforcement 200 is connected to the bottom wall of the shell body 100, and the other of the first side wing and the second side wing of the first reinforcement 200 is connected to the side wall of the shell body 100. When the first reinforcement 200 is connected to the flange at the top of the shell body 100 and the side wall, one of the first side wing and the second side wing of the first reinforcement 200 is connected to the flange, and the other of the first side wing and the second side wing of the first reinforcement 200 is connected to the side wall of the shell body 100. The connection method can be resistance spot welding or MAG welding.

[0035] Specifically, the cross-section of the first reinforcement 200 may be L-shaped, that is, one side of the L-shaped first reinforcement 200 is the first wing, and the other side is the second wing. When the first reinforcement 200 is L-shaped, the angle between the first wing and the second wing is 90 degrees. Of course, in some possible embodiments, the angle between the first wing and the second wing may also be other angles, specifically an obtuse angle or an acute angle. The angle between the first wing and the second wing may be determined based on the angle between the side wall and the bottom wall and the flange of the shell body 100. In order to improve the strength of the first reinforcement 200, a chamfer may also be provided at the angle between the first wing and the second wing.

[0036] Reference Figure 2In some embodiments of the present invention, the first reinforcement member 200 is provided with a plurality of protrusions 210 at intervals, and the plurality of protrusions 210 are located at the connection between the first side wing and the second side wing. The connection between the first side wing and the second side wing is also the corner of the first reinforcement member 200 .

[0037] When the first reinforcement 200 is L-shaped, the structural strength of the corners of the first reinforcement 200 can be significantly enhanced by providing the protrusion 210. Since the corners are often areas where the force is concentrated, stress concentration and deformation are prone to occur. By providing the protrusion 210 here, the pressure and impact force from all sides can be effectively dispersed and resisted, thereby significantly improving the bearing capacity of the entire structure. Secondly, the protrusion 210 also helps to improve the stability of the first reinforcement 200. When subjected to external force, the first reinforcement 200 may produce deformation phenomena such as bending or twisting. The presence of the protrusion 210 can increase the overall rigidity of the structure and reduce the risk of deformation, thereby maintaining the stable shape and function of the first reinforcement 200.

[0038] There is no limitation on the shape of the protrusion 210, which may be a block structure or a plate structure. When the protrusion 210 is a block structure, the protrusion 210 may be gradually expanded from the side away from the first reinforcement 200 to the direction close to the first reinforcement 200. In this way, the protrusion 210 can reduce the overall weight while providing a certain reinforcement effect. When the protrusion 210 is a plate structure, the protrusion 210 may specifically be a right-angle plate, and the two right-angle sides of the protrusion 210 are respectively connected to the two sides of the first reinforcement 200. The protrusion 210 may also be a plurality of right-angle plates arranged in parallel at intervals, and an arc-shaped connecting portion is provided between two adjacent right-angle plates. Of course, the protrusion 210 may also be some irregular shapes. In this embodiment, the connection method between the components may be resistance spot welding or MAG welding.

[0039] Reference Figure 2 In some embodiments of the present invention, a plurality of connectors 500 are provided at intervals on the side walls of the shell body 100 , and the connectors 500 are used to connect different battery pack shells.

[0040] Specifically, the connecting member 500 may be a screw sleeve, which is arranged to vertically penetrate the side wall of the shell body 100. The number of screw sleeves is not limited, and can be set according to the length of the shell body 100. A plurality of screw sleeves are symmetrically distributed on the front and rear side walls of the shell body 100, and a screw sleeve is respectively arranged at the four corners of the shell body 100. By providing the connecting member 500, a plurality of battery pack shells can be stacked and assembled. During assembly, a plurality of battery pack shells can be stacked, and the connecting members 500 on each of them are aligned, and then connected by bolts to form a multi-layer battery pack shell. Of course, when assembling a multi-layer battery pack shell, the battery module needs to be installed inside it.

[0041] In some possible embodiments, the connector 500 is a connecting ear, which is welded to the side wall of the shell body 100 and protrudes from the side wall of the shell body 100, and a thread is provided on the connecting ear. When multiple battery pack shells need to be assembled, the connecting ears on the battery pack shells on the adjacent two sides can be aligned, and then the two connecting ears can be connected by bolts. In this embodiment, the connection method between each component can be resistance spot welding or MAG welding.

[0042] Reference Figure 1 and Figure 2 In some embodiments of the present invention, the battery pack housing further includes a second reinforcement 300 , and the second reinforcement 300 is arranged along the width direction of the shell body 100 .

[0043] Specifically, two second reinforcement members 300 are provided, and the two second reinforcement members 300 are symmetrically arranged up and down, and one end is welded to the front wall of the shell body 100, and the other end is welded to the rear wall of the shell body 100. Thus, the cavity inside the shell body 100 is divided into two identical cavities. Of course, in some possible embodiments, since a connecting member 500 is provided in the middle of the side wall of the shell body 100, and the second reinforcement member 300 is also provided in the middle of the shell body 100, the two ends of the second reinforcement member 300 can be connected to the connecting members 500 located on the front and rear walls respectively.

[0044] In the above structure, the shell body 100 is easily deformed when subjected to external forces, especially when subjected to compression, tension or torsion from different directions. By arranging the second reinforcement 300 in the middle position, these external forces can be effectively dispersed, so that the shell body 100 is subjected to more uniform forces, thereby improving its overall rigidity. By arranging the second reinforcement 300, whether in bearing heavy loads, resisting external force impacts, or maintaining shape stability and extending service life, it can play an important role, making the shell body 100 more adaptable to various complex working environments and usage scenarios.

[0045] In some possible embodiments, in order to enhance the stability of the connection between the rib plate 400 and the second reinforcement 300, a rib plate 400 may be provided between the rib plate 400 and the second reinforcement 300, wherein the rib plate 400 may be a right-angle plate-shaped structure, one right-angle side of the rib plate 400 is connected to the connector 500, and the other right-angle side is connected to the second reinforcement 300. In this embodiment, the connection between the components may be resistance spot welding or MAG welding.

[0046] Reference Figure 1 In some embodiments of the present invention, a plurality of module mounting beams 700 are provided at intervals on the bottom wall of the cavity, and the module mounting beams 700 are used to mount the battery modules.

[0047] Reference Figure 1 In some embodiments, a second reinforcement member 300 is provided in the middle of the shell body 100, and the second reinforcement member 300 divides the cavity inside the shell body 100 into two identical small cavities. Two module mounting beams 700 are provided at intervals at the bottom of each small cavity. Of course, in some other embodiments, multiple second reinforcement members 300 may also be provided to divide the cavity into more small cavities. It can be designed according to actual conditions and will not be elaborated. It should be noted that the number of module mounting beams 700 should be designed according to the number of battery modules, and one battery module can be installed corresponding to two module mounting beams 700 provided at intervals.

[0048] Reference Figure 1 In some embodiments of the present invention, end plate supports 600 are provided at both ends of the shell body 100 .

[0049] In this embodiment, end plate supports 600 are provided at both ends of the shell body 100 so that when the battery pack shell is connected to other components, a placement space can be formed at both ends for placing other parts such as wires, thereby making the assembly of the entire device neater.

[0050] It should be noted that in some possible embodiments, the first reinforcement member 200 , the second reinforcement member 300 , the rib plate 400 , the end plate support 600 , and the module mounting beam 700 may all be integrally formed by sheet metal stamping.

[0051] The utility model also provides a battery pack, comprising a battery pack housing, a battery module and a housing cover as in any one of the above embodiments. The battery module is disposed in a cavity inside the housing. The housing cover is disposed at the top of the battery pack housing to close the battery pack housing. In this embodiment, the connection between the components can be resistance spot welding or MAG welding.

[0052] It can be understood that the battery pack of this embodiment can be assembled by stacking multiple battery pack shells with battery modules installed in them, and then sealing the topmost battery pack shell with a shell cover, so that the utility model can be assembled into battery packs with different capacities.

[0053] The present invention also provides a working machine, including a battery pack as described in the above embodiment. In the embodiment of the present invention, the type of the working machine is not limited, for example, the working machine may be an excavator, a crane, a loader, etc. In other words, as long as the working machine can use the battery pack in the present invention, it will be fine.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A battery pack housing, characterized in that: include: The shell body (100) has a cavity inside, and the shell body (100) is integrally formed by sheet metal stamping; A first reinforcement member (200) is provided on the shell body (100), and the first reinforcement member (200) is used to enhance the strength of the shell body (100); The shell body (100) is provided with an opening at the top, and the opening is provided with a flange; A plurality of the first reinforcement members (200) are provided, some of the first reinforcement members (200) are provided at the connection between the bottom wall and the side wall of the shell body (100), and another portion of the first reinforcement members (200) are provided at the connection between the flange and the side wall.

2. The battery pack housing according to claim 1, characterized in that: The first reinforcement member (200) comprises a first side wing and a second side wing, wherein the first side wing and the second side wing are fixedly connected at an angle; one of the first side wing and the second side wing is connected to the side wall, and the other of the first side wing and the second side wing is connected to the bottom wall or the flange.

3. The battery pack housing according to claim 2, characterized in that: The first reinforcement member (200) is provided with a plurality of protrusions (210) at intervals, and the protrusions (210) are located at the connection between the first side wing and the second side wing.

4. The battery pack housing according to any one of claims 1 to 3, characterized in that: The shell body (100) is provided with a plurality of connectors (500) at intervals, and the connectors (500) are used to connect different battery pack shells.

5. The battery pack housing according to any one of claims 1 to 3, characterized in that: The battery pack housing further includes a second reinforcement member (300), and the second reinforcement member (300) is arranged along the width direction of the shell body (100).

6. The battery pack casing according to claim 4, characterized in that: A plurality of module mounting beams (700) are arranged at intervals on the bottom wall of the cavity, and the module mounting beams (700) are used to mount battery modules.

7. The battery pack housing according to claim 4 or 6, characterized in that: End plate supports (600) are provided at both ends of the shell body (100).

8. A battery pack, characterized in that: include: The battery pack housing according to any one of claims 1 to 7; A battery module is arranged in the cavity; The shell cover is arranged on the top of the battery pack shell to close the battery pack shell.

9. A working machine, characterized in that: Comprising the battery pack as claimed in claim 8.

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