Battery box, battery pack and battery pack system

Abstract

This utility model provides a battery box, a battery pack, and a battery pack system. The battery box includes: a battery box body; a support base, with the support base connected to at least one side of the battery box body circumferentially, the support base being configured to be installed on a foundation; and a mating structure including a recess and a protrusion, one of the battery box body and the support base having a recess, and the other of the battery box body and the support base having a protrusion, the recess and the protrusion mating. The technical solution of this utility model solves the problem in the prior art that the weld between the battery box body and the support base is prone to cracking or breakage due to low strength.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and more specifically, to a battery box, a battery pack, and a battery pack system. Background Technology

[0002] For the installation and stacking of battery packs in a battery management system, a stacking + cluster frame structure is often used, in which the PACK enclosure is connected to the lower PACK or bottom frame through support blocks.

[0003] In the existing technology, the weight of the PACK is mainly transferred through the weld between the plane of the enclosure and the plane of the support block. Since the weld bears a large load, especially when encountering vibration and impact during vehicle operation, the weld is prone to cracks or fractures due to insufficient strength, which can lead to the failure of the entire structure and thus affect the service life of the battery pack. Utility Model Content

[0004] The main objective of this invention is to provide a battery box, battery pack, and battery pack system to solve the problem in the prior art where the weld between the battery box and the support base is prone to cracking or breakage due to low strength.

[0005] To achieve the above objectives, the present invention provides a battery box, comprising: a battery box body; a support base, wherein the support base is connected to at least one side of the battery box body in the circumferential direction, and the support base is configured to be installed on the foundation to be installed; and a mating structure, including a recess and a protrusion, wherein one of the battery box body and the support base has a recess and the other of the battery box body and the support base has a protrusion, and the recess and the protrusion mate.

[0006] Furthermore, the battery box has a recessed portion, and the mating structure also includes a protrusion provided on the battery box, with at least one of the upper and lower sides of the recessed portion having a protrusion; the support base has a protruding portion, and the mating structure also includes a recessed portion provided on the support base, with at least one of the upper and lower sides of the protruding portion having a recess, and the protruding portion and the recessed portion mating.

[0007] Furthermore, the recessed portion has protrusions on both the upper and lower sides, and the protruding portion has recesses on both the upper and lower sides, with the two protrusions corresponding to and engaging with the two recesses respectively.

[0008] Furthermore, the support base has a clearance groove on the side opposite to the battery box, and the support base also has a mounting through hole that extends from the bottom wall of the clearance groove to the bottom surface of the support base.

[0009] Furthermore, the top of the support base is provided with a mounting hole, which is located above the clearance groove and communicates with the clearance groove, while the mounting through hole is located below the clearance groove.

[0010] Furthermore, a support member is connected to the side of the support base facing the battery box. The support member is located at the bottom end of the support base and protrudes towards the battery box. The support member is used to support the bottom plane of the battery box. And / or, a positioning member is connected to the side of the support base facing the battery box. The positioning member is located at the top end of the support base and protrudes towards the battery box. The downward side of the positioning member is provided with a positioning surface, which is matched with the top surface of the battery box.

[0011] Furthermore, the support is one of die casting, profile welded part, and sheet metal stamping welded part; and / or, the support is installed on the battery box by one of welding, bolting, gluing, FDS and riveting.

[0012] Furthermore, there are multiple support seats, and the battery box includes a bottom plate, a top cover, and four side beams for forming an accommodating cavity, with at least two support seats spaced apart on the side beams.

[0013] According to another aspect of the present invention, the present invention provides a battery pack, including a battery module and the aforementioned battery box, wherein the battery module is installed inside the battery box.

[0014] According to another aspect of the present invention, the present invention provides a battery pack system, comprising: a support frame; a plurality of the above-described battery packs, wherein the plurality of battery packs are stacked sequentially on the support frame; the support seats of two adjacent battery packs among the plurality of battery packs are connected by a locking member; and / or, the support seats of the battery packs adjacent to the support frame among the plurality of battery packs are connected to the support frame by a locking member.

[0015] By applying the technical solution of this utility model, and by setting matching recessed and protruding parts, with the protruding part embedded in the recessed part, the contact area between the support base and the battery box can be increased, so that the force of the battery box can be better transmitted to the support base. This reduces the burden on the connection position (weld, bolt, or riveted connection) between the battery box and the support base, and avoids the problem of cracks or breaks at the connection position (weld) due to insufficient strength. This improves the structural reliability of the battery box and thus extends the service life of the battery pack. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of an embodiment of the battery pack system of this utility model is shown;

[0018] Figure 2 It shows Figure 1 A schematic diagram of the battery pack structure of the battery pack system;

[0019] Figure 3 It shows Figure 2 A schematic diagram of the structure of the battery pack support base;

[0020] Figure 4 It shows Figure 2 A schematic diagram of the side beam of the battery pack.

[0021] The above figures include the following reference numerals:

[0022] 1. Support frame; 2. Locking element; 3. Battery pack; 31. Side beam; 311. Recess; 312. Protrusion; 313. Bottom plane; 32. Support base; 321. Upper surface; 322. Mounting hole; 323. Protrusion; 324. Mounting through hole; 325. Recess; 326. Support element; 327. Lower surface; 328. Clearance groove; 5. Battery box. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figures 1 to 4 As shown, an embodiment of this utility model provides a battery box. The battery box includes: a battery box body 5; a support base 32, on which at least one side of the battery box body 5 is connected to the support base 32, the support base 32 being configured to be installed on the foundation to be installed; and a mating structure including a recessed portion 311 and a protruding portion 323, one of the battery box body 5 and the support base 32 having a recessed portion 311, and the other of the battery box body 5 and the support base 32 having a protruding portion 323, the recessed portion 311 and the protruding portion 323 mating.

[0025] In the above technical solution, by setting a matching recessed portion 311 and a protruding portion 323, with the protruding portion 323 embedded in the recessed portion 311, the contact area between the support base 32 and the battery box 5 can be increased, so that the force of the battery box 5 can be better transmitted to the support base 32, thereby reducing the burden on the connection position (weld, bolt, or riveted connection) between the battery box 5 and the support base 32, and avoiding the problem that the connection position (weld) is prone to cracking or breakage due to insufficient strength, thereby improving the structural reliability of the battery box and thus improving the service life of the battery pack.

[0026] It should be noted that the foundation to be installed can be the support base 32 of the adjacent battery pack or a support frame.

[0027] like Figure 3 and Figure 4As shown in the embodiment of this utility model, the battery box 5 is provided with a recessed portion 311, and the mating structure also includes a protrusion 312 provided on the battery box 5. At least one of the upper and lower sides of the recessed portion 311 is provided with the protrusion 312. The support base 32 is provided with a protruding portion 323, and the mating structure also includes a recessed portion 325 provided on the support base 32. At least one of the upper and lower sides of the protruding portion 323 is provided with the recessed portion 325, and the protruding portion 312 and the recessed portion 325 are mated.

[0028] In the above technical solution, by setting a matching protrusion 312 and a recess 325, the protrusion 312 is embedded in the recess 325, which can further increase the contact area between the support base 32 and the battery box 5, so as to further reduce the burden on the connection position (weld or bolted or riveted connection) between the battery box 5 and the support base 32, thereby avoiding connection failure.

[0029] like Figure 3 and Figure 4 As shown in the embodiment of this utility model, the upper and lower sides of the recessed portion 311 are provided with protrusions 312, and the upper and lower sides of the protruding portion 323 are provided with recesses 325. The two protrusions 312 respectively cooperate with the two recesses 325. In this way, the connection stability between the support base 32 and the battery box 5 can be further increased, thereby improving the service life of the battery pack.

[0030] In connecting the two battery pack enclosures, bolts are typically used. In existing technology, due to insufficient space on the support blocks for bolt installation, the width of the support blocks is usually increased. However, this increases the size of the battery pack, thus reducing its energy density. Therefore, as... Figure 3 As shown in the embodiment of this utility model, the side of the support base 32 away from the battery box 5 is provided with a clearance groove 328, and the support base 32 is also provided with a mounting through hole 324, which extends from the bottom wall of the clearance groove 328 to the bottom surface of the support base 32.

[0031] With the above configuration, the clearance groove 328 on the support 32 can provide a bolt mounting position, thereby avoiding the need to increase the width of the support 32 to place the bolts, which can reduce the amount of material used and improve the energy density of the battery pack.

[0032] like Figure 3As shown in the embodiment of this utility model, the top of the support base 32 is provided with a mounting hole 322, which is located above and communicates with the clearance groove 328, and the mounting through hole 324 is located below the clearance groove 328. In this way, bolts can be passed sequentially through the mounting through hole 324 of the upper battery pack and the mounting hole 322 of the lower battery pack before being connected with a nut to achieve the connection between the upper and lower battery packs.

[0033] In some embodiments, the mounting hole 322 is provided with an internal thread, and the stud of the bolt passes through the mounting through hole 324 of the upper battery pack and is threadedly connected to the mounting hole 322 of the lower battery pack. In this way, the connection between two adjacent battery packs can be achieved without setting a nut.

[0034] In some embodiments, the studs of the bolts can be threaded through the mounting holes 324 of the battery pack and connected to the support frame.

[0035] In some embodiments, such as Figure 3 and Figure 4 As shown, mounting through hole 324 and mounting hole 322 extend in the vertical direction for bolt installation.

[0036] like Figure 3 and Figure 4 As shown in the embodiment of this utility model, a support member 326 is connected to the side of the support base 32 facing the battery box 5. The support member 326 is located at the bottom end of the support base 32 and protrudes towards the battery box 5. The support member 326 is used to support the bottom plane 313 of the battery box 5.

[0037] With the above configuration, the support member 326 can provide additional support to the battery box 5 by fitting against the bottom plane 313 of the battery box 5, thereby enhancing the stability of the battery box 5 in dynamic environments and reducing the risk of displacement of the battery box 5 due to vibration or collision.

[0038] In some embodiments, a positioning member is connected to the side of the support base 32 facing the battery box 5. The positioning member is located at the top of the support base 32 and protrudes towards the battery box 5. The downward-facing side of the positioning member has a positioning surface that engages with the top surface of the battery box 5. In this way, the positioning surface of the positioning member, through its engagement with the top surface of the battery box 5, not only limits the range of movement of the battery box 5 but also facilitates the installation of the support base 32. This enhances the stability of the battery box 5 in dynamic environments and reduces the risk of displacement of the battery box 5 due to vibration or collision.

[0039] like Figure 3As shown in the embodiments of this utility model, the support base 32 is one of a die-cast part, a profile welded part, and a sheet metal stamped welded part; and / or, the support base 32 is installed on the battery box 5 by one of welding, bolting, gluing, FDS, and riveting. In this way, by providing a variety of materials and installation methods for the support base 32, the overall performance and production efficiency of the battery box 5 can be improved, and the manufacturing cost can be reduced.

[0040] In some embodiments, the side of the support base 32 facing the battery box 5 is welded to the side beam 31 by solder to form a weld; or, bolts can be threaded through the protrusion 323 of the support base 32 to the side beam 31; or, the side of the support base 32 facing the battery box 5 is glued to the side beam 31; or, screws can be threaded through the protrusion 323 of the support base 32 to the side beam 31.

[0041] It should be noted that FDS (Flow Drill Screw) is a type of self-tapping screw connection technology. During installation, the special drill bit at the front of the FDS screw penetrates the material (usually metal) of the parts being connected, creating threads within the material. In this process, the drill bit melts the metal material, using the flowing metal to fill the gap between the screw and the material, thus forming a strong connection.

[0042] like Figure 1 and Figure 2 As shown in the embodiment of this utility model, there are multiple support seats 32, and the battery box 5 includes a bottom plate, a top cover and four side beams 31 for forming an accommodating cavity. At least two support seats 32 are provided on the side beams 31 at intervals.

[0043] In the above technical solution, by setting multiple support seats 32 on the side beam 31, a grid-like support structure is formed, which can enhance the overall structural strength of the battery box 5. In particular, the uniform distribution on the side beam 31 can effectively disperse the load and improve the seismic resistance and service life.

[0044] In some embodiments, support bases 32 may be installed on all four side beams 31 or on some of the side beams 31.

[0045] In some embodiments, the side beam 31 is provided with a recess 311, a protrusion 312, and a bottom plane 313.

[0046] It should be noted that through the cooperation of the recessed part 311 and the protruding part 323, the cooperation of the protruding part 312 and the recessed part 325, and the fit between the support member 326 and the bottom plane 313 of the battery box 5, the force of the battery box 5 can be better transmitted to the support base 32, thereby reducing the burden on the connection position (weld, bolt, or riveted connection) between the battery box 5 and the support base 32. This avoids the problem that the connection position (weld) is prone to cracking or breaking due to insufficient strength, thereby improving the structural reliability of the battery box and thus increasing the service life of the battery pack.

[0047] like Figure 2 As shown, an embodiment of this utility model provides a battery pack, including a battery module and the aforementioned battery box, wherein the battery module is installed inside the battery box 5.

[0048] The battery pack described above has all the advantages of the battery box described above, which will not be repeated here.

[0049] like Figure 1 As shown, an embodiment of the present invention provides a battery pack system, including: a support frame 1; a plurality of battery packs 3, which are stacked sequentially on the support frame 1; the support seats 32 of two adjacent battery packs 3 are connected by a locking member 2; and / or, the support seats 32 of the battery packs 3 adjacent to the support frame 1 are connected to the support frame 1 by the locking member 2.

[0050] In some embodiments, such as Figure 1 As shown, the battery packs are stacked on the support frame 1. The upper and lower battery packs 3 are fixed together and the bottom battery pack 3 is fixed to the support frame 1 by locking parts 2, which are bolts.

[0051] In some embodiments, such as Figure 2 and Figure 3 As shown, when the battery pack 3 is stacked on the support frame 1, the lower surface 327 of the support base 32 is in contact with the upper surface of the support frame 1, and when the battery pack 3 is stacked on the battery pack 3, the lower surface 327 of the support base 32 is in contact with the upper surface 321 of the support base 32.

[0052] It should be noted that multiple battery packs 3 are stacked sequentially on the support frame 1 along the height direction of the battery packs.

[0053] The battery pack system described above has all the advantages of the aforementioned battery pack, which will not be elaborated here.

[0054] As can be seen from the above description, the above embodiments of this utility model achieve the following technical effects: by setting matching recessed and protruding parts, with the protruding part embedded in the recessed part, the contact area between the support base and the battery box can be increased, so that the force of the battery box can be better transmitted to the support base, thereby reducing the burden on the connection position (weld, bolt, or riveted connection) between the battery box and the support base, and avoiding the problem that the connection position (weld) is prone to cracking or breaking due to insufficient strength, thereby improving the structural reliability of the battery box and thus improving the service life of the battery pack.

[0055] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery box characterized by, include: Battery housing (5); Support base (32), the battery box (5) is connected to at least one side of the circumference of the support base (32), the support base (32) is configured to be installed on the foundation to be installed; The mating structure includes a recess (311) and a protrusion (323). The recess (311) is provided on one of the battery box (5) and the support base (32), and the protrusion (323) is provided on the other of the battery box (5) and the support base (32). The recess (311) and the protrusion (323) are mated.

2. The battery box according to claim 1, characterized in that, The battery housing (5) is provided with the recess (311), and the mating structure also includes a protrusion (312) provided on the battery housing (5). At least one of the upper and lower sides of the recess (311) is provided with the protrusion (312). The support base (32) is provided with the protrusion (323), and the mating structure further includes a recess (325) provided on the support base (32). At least one of the upper and lower sides of the protrusion (323) is provided with the recess (325), and the protrusion (312) mates with the recess (325).

3. The battery pack of claim 2, wherein, The recessed portion (311) is provided with the protrusion (312) on both the upper and lower sides, and the protruding portion (323) is provided with the recessed portion (325) on both the upper and lower sides, with the two protrusions (312) corresponding to and cooperating with the two recesses (325).

4. The battery box according to any one of claims 1 to 3, characterized by, The support base (32) has a clearance groove (328) on the side opposite to the battery box (5), and the support base (32) is also provided with a mounting through hole (324), which extends from the bottom wall of the clearance groove (328) to the bottom surface of the support base (32).

5. The battery pack of claim 4, wherein, The top of the support base (32) is provided with a mounting hole (322), which is located above the clearance groove (328) and communicates with the clearance groove (328). The mounting through hole (324) is located below the clearance groove (328).

6. The battery box according to any one of claims 1 to 3, characterized by A support member (326) is connected to the side of the support base (32) facing the battery box (5). The support member (326) is located at the bottom end of the support base (32) and protrudes towards the battery box (5). The support member (326) is used to support the bottom plane (313) of the battery box (5); and / or, A positioning member is connected to the side of the support base (32) facing the battery box (5). The positioning member is located at the top of the support base (32) and protrudes towards the battery box (5). The downward side of the positioning member is provided with a positioning surface, which is matched with the top surface of the battery box (5).

7. The battery box according to any one of claims 1 to 3, characterized by The support base (32) is one of a die-cast part, a profile welded part, and a sheet metal stamped welded part; and / or, The support base (32) is installed on the battery box (5) by one of welding, bolting, gluing, FDS and riveting.

8. The battery box according to any one of claims 1 to 3, characterized in that, There are multiple support seats (32), and the battery box (5) includes a bottom plate, a top cover and four side beams (31) for forming a cavity. At least two of the support seats (32) are provided on the side beams (31) at intervals.

9. A battery pack, characterized by, It includes a battery module and a battery box according to any one of claims 1 to 8, wherein the battery module is installed inside the battery box body (5).

10. A battery pack system characterized by, include: Support frame (1); The battery packs (3) of claims 9 are stacked sequentially on the support frame (1); The support bases (32) of two adjacent battery packs (3) are connected by a locking member (2); and / or, the support bases (32) of the battery packs (3) adjacent to the support frame (1) are connected to the support frame (1) by a locking member (2).

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