Battery pack lower shell assembly and battery pack

Abstract

The utility model provides a battery pack lower shell assembly and a battery pack. The battery pack lower shell assembly comprises a bottom plate, wherein a through hole extending along a first direction is formed in the bottom plate; the two side frames are arranged at the two opposite ends of the bottom plate in the first direction, and parts of the side frames are inserted into the through holes, so that the side frames and the bottom plate are spliced into an integral structure; each side frame is provided with the corresponding hanging lug, and the hanging lugs are used for being connected with the whole vehicle. According to the technical scheme, the structure is simple, and light weight is achieved.

Description

Technical Field

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

[0002] As the main energy storage device of new energy vehicles, the power battery system is a key component of new energy vehicles. Since power batteries generally have characteristics such as large capacity and high voltage, their energy density is an important performance indicator, which requires consideration of the lightweight design of the battery pack shell.

[0003] At present, the lower shell structure of the battery pack on the market includes side walls, a bottom plate, and horizontal and vertical mounting beams, etc. The structure is relatively complex and cannot be lightweight. Utility Model Content

[0004] The main purpose of the utility model is to provide a battery pack lower shell assembly and a battery pack, which can solve the problem that the battery pack lower shell assembly in the prior art has a complex structure and cannot be lightweight.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery pack lower shell assembly is provided, including: a bottom plate, a through hole extending along a first direction is opened in the bottom plate; two side frames, side frames are provided at opposite ends of the bottom plate along the first direction, and parts of the side frames are inserted into the through holes so that the side frames and the bottom plate are spliced ​​into an integral structure; hanging ears, each side frame is provided with a hanging ear, and the hanging ear is used to connect with the whole vehicle.

[0006] Furthermore, the side frame includes: a positioning piece, which is plugged into the through hole; a mounting piece, one end of which is connected to the positioning piece, and the other end of which is directly or indirectly connected to the hanging ear; a locking piece, which is arranged on the mounting piece at intervals along a second direction that is at an angle to the first direction, and is used to connect to the accessories.

[0007] Furthermore, the upper surface of the mounting member is flush with the upper surface of the base plate; and / or the lower surface of the mounting member is flush with the lower surface of the base plate.

[0008] Furthermore, the lower shell assembly of the battery pack also includes a connecting piece connected to the mounting piece, the connecting piece is located on a side of the mounting piece away from the positioning piece, and the connecting piece is connected to the hanging ear.

[0009] Furthermore, the lower shell assembly of the battery pack also includes a positioning protrusion and a positioning groove cooperating with the positioning protrusion, the positioning groove is arranged on one of the connecting piece and the hanging ear, and the positioning protrusion is connected to the other one of the connecting piece and the hanging ear.

[0010] Furthermore, the side frame is detachably connected to the hanging ear, and the lower shell assembly of the battery pack also includes: a bushing connected to the side frame, the bushing is provided with a first threaded through hole, and the first threaded through hole extends along a second direction having an angle with the first direction; a wire screw sleeve connected to the hanging ear, the wire screw sleeve is provided with a second threaded through hole extending along the second direction; a fastener passes through the first threaded through hole and is connected to the second threaded through hole.

[0011] Furthermore, the lower shell assembly of the battery pack includes a plurality of bottom plates arranged in sequence along a third direction, the third direction forms an angle with the first direction, two adjacent bottom plates are welded together, and side frames are provided at both ends of the plurality of bottom plates that are relatively arranged along the first direction, the side frames are welded together with the bottom plates, and a notch for avoiding the side frame is provided on one side of the two adjacent bottom plates that are in contact with each other.

[0012] Furthermore, the base plate also includes a reinforcing rib arranged in the through hole and connected to the base plate, the reinforcing rib extends along a first direction, and along the first direction, both opposite ends of the reinforcing rib are provided with avoidance gaps, and the avoidance gaps are used to avoid the side frame; or, along the first direction, there is a gap between the opposite ends of the reinforcing rib and the corresponding ends of the base plate, and the length of the reinforcing rib is less than the length of the base plate.

[0013] Furthermore, the bottom plate includes a plurality of reinforcing ribs, and the plurality of reinforcing ribs are arranged at intervals along a third direction, and the third direction has an angle with the first direction.

[0014] According to one aspect of the utility model, a battery pack is provided, comprising a housing and the above-mentioned battery pack lower shell assembly disposed in the housing.

[0015] The technical solution of the utility model is applied, the side frame is used to connect the lug and the bottom plate, the lug is used to connect to the whole vehicle, the side frame and the bottom plate are used to connect to the accessories to be installed (such as modules), the side frame and the bottom plate are plugged together to form an integral structure, compared with the solution of setting side walls in the prior art, the solution of the present application does not need to set side walls, the structure is simple, and the degree of lightness is high. The bottom plate and the side frame are plugged together to improve the assembly efficiency; the bottom plate is provided with through holes to reduce weight, and the bottom plate is only provided with side frames at the two opposite ends, which further reduces weight and achieves lightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0017] In the figure:

[0018] Figure 1 A schematic structural diagram of a battery pack lower housing assembly according to an embodiment of the utility model is shown;

[0019] Figure 2 Shows Figure 1 A schematic structural diagram of a bottom plate of a lower housing assembly of a battery pack;

[0020] Figure 3 Shows Figure 1 A schematic structural diagram of a side frame of a lower housing assembly of a battery pack;

[0021] Figure 4 Shows Figure 1 A schematic diagram of the structure of the hanging ear of the lower shell assembly of the battery pack;

[0022] Figure 5 Shows Figure 1 Assembly drawing of the mounting ears and side frame of the battery pack lower shell assembly.

[0023] The above drawings include the following reference numerals:

[0024] 1. Bottom plate; 12. Reinforcement ribs; 13. Through holes; 2. Side frames; 21. Positioning grooves; 22. Positioning pieces; 221. Positioning plates; 222. Connecting plates; 24. Locking pieces; 25. Wire screw sleeves; 27. Connecting pieces; 28. Mounting pieces; 3. Hanging ears; 32. Bushings; 33. Positioning bosses. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] See also Figures 1 to 5 As shown, the utility model provides a battery pack lower shell assembly, including: a bottom plate 1, in which a through hole 13 extending along a first direction is opened; two side frames 2, along the first direction, side frames 2 are provided at opposite ends of the bottom plate 1, and parts of the side frames 2 are inserted into the through hole 13 so that the side frames 2 and the bottom plate 1 are spliced ​​into an integral structure; hanging ears 3, each side frame 2 is provided with a hanging ear 3, and the hanging ear 3 is used to connect with the whole vehicle.

[0027] In the above technical solution, the side frame 2 is used to connect the hanging ear 3 and the bottom plate 1, the hanging ear is used to connect to the whole vehicle, the side frame 2 and the bottom plate 1 are used to connect to the accessories to be installed (such as modules), and the side frame 2 is plugged into the bottom plate 1 to form an integral structure. Compared with the solution of setting side walls in the prior art, the solution of the present application does not need to set side walls, has a simple structure, and is highly lightweight.

[0028] Through the above arrangement, the bottom plate 1 and the side frame 2 are plugged together to improve assembly efficiency; the bottom plate 1 is provided with a through hole 13 to reduce weight, and the bottom plate 1 is only provided with side frames 2 at two opposite ends to further reduce weight and achieve lightweight.

[0029] like Figures 1 to 5 As shown, in an embodiment of the utility model, the side frame 2 includes: a positioning member 22, which is plugged into the through hole 13; a mounting member 28, one end of which is connected to the positioning member 22, and the other end of which is directly or indirectly connected to the hanging ear 3; a locking member 24, which is arranged on the mounting member 28 at intervals along a second direction that is angled with the first direction, and the locking member 24 is used to connect with accessories.

[0030] In the above technical solution, the locking member 24 is a blind rivet nut, which is used to connect with the accessories to be installed (such as modules, high-voltage boxes, relays, fuses or BMS). The positioning member 22 includes two positioning plates 221 arranged opposite to each other and a connecting plate 222 for connecting the two positioning plates 221, and the connecting plate 222 is connected to the mounting member 28.

[0031] like Figures 1 to 5 As shown, in the embodiment of the present utility model, the upper surface of the mounting member 28 is flush with the upper surface of the bottom plate 1, and the lower surface of the mounting member 28 is flush with the lower surface of the bottom plate 1. In this way, the mounting member 28 does not protrude from the bottom plate 1, and the lightweight effect can be achieved.

[0032] In another embodiment of the present invention, only the upper surface of the mounting member 28 may be flush with the upper surface of the base plate 1 , or only the lower surface of the mounting member 28 may be flush with the lower surface of the base plate 1 .

[0033] like Figures 1 to 5 As shown, in an embodiment of the present invention, the battery pack lower shell assembly further includes a connecting member 27 connected to the mounting member 28 , the connecting member 27 is located on a side of the mounting member 28 away from the positioning member 22 , and the connecting member 27 is connected to the hanging ear 3 .

[0034] In the above technical solution, each mounting member 28 is connected to two connecting members 27 , and the two connecting members 27 and the positioning member 22 are respectively arranged on opposite sides of the mounting member 28 . The connecting member 27 has a cavity, and a bushing 32 is welded in the cavity for connecting the hanging ear 3 .

[0035] like Figures 1 to 5 As shown, in an embodiment of the utility model, the battery pack lower shell assembly also includes a positioning protrusion 33 and a positioning groove 21 cooperating with the positioning protrusion 33, the positioning groove 21 is opened on one of the connecting member 27 and the hanging ear 3, and the positioning protrusion 33 is connected to the other one of the connecting member 27 and the hanging ear 3.

[0036] In the above technical solution, the positioning protrusion 33 is connected to the bottom of the hanging ear 3, and the positioning groove 21 is opened on the upper surface of the connecting member 27. The positioning protrusion 33 cooperates with the positioning groove 21 to position the connecting member 27 and the hanging ear 3, thereby avoiding relative movement between the connecting member 27 and the hanging ear 3 in the first direction.

[0037] In another embodiment of the present invention, the positioning groove 21 is formed on the hanging ear 3 , and the positioning protrusion 33 is connected to the connecting member 27 .

[0038] like Figures 1 to 5 As shown, in an embodiment of the utility model, the side frame 2 is detachably connected to the hanging ear 3, and the lower shell assembly of the battery pack also includes: a bushing 32, which is connected to the side frame 2, and the bushing 32 is provided with a first threaded through hole, and the first threaded through hole extends along a second direction having an angle with the first direction; a wire screw sleeve 25, which is connected to the hanging ear 3, and the wire screw sleeve 25 is provided with a second threaded through hole extending along the second direction; a fastener, which passes through the first threaded through hole and is connected to the second threaded through hole.

[0039] In the above technical solution, the bushing 32 is located in the cavity of the connecting member 27, and two blind holes are provided on the positioning protrusion 33 of the hanging ear 3, and the wire screw sleeve 25 is fixed in the blind hole. The fastener is a bolt, which passes through the bushing 32 and is connected to the wire screw sleeve 25, so that the hanging ear 3 is detachably connected to the side frame 2.

[0040] Through the above arrangement, compared with the solution of welding the hanging ear 3 to the side plate in the prior art, the present application reduces the welding process and is easy to operate. Fewer positions need to be welded as a whole, and welding deformation can be effectively reduced, which is conducive to reducing the cost of after-sales maintenance.

[0041] like Figures 1 to 5 As shown, in an embodiment of the utility model, the hanging ear 3 is L-shaped, a cavity is provided inside the L-shaped structure, and a reinforcement member is also provided on the hanging ear 3, one end of the reinforcement member is connected to one side of the L-shaped structure, and the other end of the reinforcement member is connected to the other side of the L-shaped structure, so as to play a role in structural reinforcement of the hanging ear 3.

[0042] In the above technical solution, a bolt through-hole bushing is also welded on the hanging ear 3, which is used to bolt the lower shell assembly of the battery pack to the whole vehicle.

[0043] like Figures 1 to 5 As shown, in an embodiment of the utility model, the lower shell assembly of the battery pack includes a plurality of bottom plates 1 arranged in sequence along a third direction, the third direction forms an angle with the first direction, two adjacent bottom plates 1 are welded together, and side frames 2 are provided at both ends of the plurality of bottom plates 1 that are relatively arranged along the first direction, the side frames 2 are welded together with the bottom plates 1, and a notch for avoiding the side frames 2 is provided on one side of the two adjacent bottom plates 1 that are in contact with each other.

[0044] In the above technical solution, the lower shell assembly of the battery pack includes two bottom plates 1 and two side frames 2. The two bottom plates 1 are welded together, and the bottom plate 1 and the side frame 2 are welded together. By setting a notch, the positioning member 22 can be avoided to prevent the positioning member 22 from interfering with the bottom plate 1.

[0045] like Figures 1 to 5 As shown, in an embodiment of the utility model, the base plate 1 also includes a reinforcing rib 12 arranged in the through hole 13 and connected to the base plate 1, the reinforcing rib 12 extends along a first direction, and along the first direction, the opposite ends of the reinforcing rib 12 are provided with avoidance gaps, and the avoidance gaps are used to avoid the side frame 2.

[0046] In the above technical solution, the bottom plate 1 includes a plurality of reinforcing ribs 12, and the plurality of reinforcing ribs 12 are arranged at intervals along a third direction, and the third direction has an angle with the first direction.

[0047] Through the above arrangement, the reinforcing rib 12 can strengthen the structure of the base plate 1 to ensure structural strength. The avoidance notch is formed by milling and can avoid the positioning piece 22 to avoid interference with the reinforcing rib 12 when the positioning piece 22 is inserted into the through hole 13.

[0048] like Figures 1 to 5 As shown, in the embodiment of the present invention, along the first direction, there is a gap between the opposite ends of the reinforcing rib 12 and the corresponding ends of the bottom plate 1 , and the length of the reinforcing rib 12 is smaller than the length of the bottom plate 1 .

[0049] Through the above arrangement, it is possible to avoid interference between the positioning member 22 and the reinforcing rib 12 when the positioning member 22 is inserted into the through hole 13 .

[0050] like Figures 1 to 5 As shown, in the embodiment of the present utility model, a plurality of rivet nuts are riveted on the upper surface of the base plate 1. The rivet nuts can be connected with the accessories to be installed (such as modules, high-voltage boxes, relays, fuses or BMS).

[0051] The utility model also provides a battery pack, comprising an outer shell and the above-mentioned battery pack lower shell component arranged in the outer shell.

[0052] The battery pack of the present invention has all the technical features and all the technical effects of the above-mentioned battery pack lower shell assembly, which will not be repeated here.

[0053] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: the side frame is used to connect the lug and the bottom plate, the lug is used to connect to the whole vehicle, the side frame and the bottom plate are used to connect to the accessories to be installed (such as modules), the side frame and the bottom plate are plugged together to form an integral structure, compared with the solution of setting side walls in the prior art, the solution of this application does not need to set side walls, the structure is simple, and the degree of lightweight is high. The bottom plate and the side frame are plugged together to improve the assembly efficiency; the bottom plate is provided with through holes to reduce weight, and the bottom plate is only provided with side frames at the two opposite ends, which further reduces weight and achieves lightweight.

[0054] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0056] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery pack lower housing assembly, characterized in that: include: A bottom plate (1), wherein a through hole (13) extending along a first direction is formed in the bottom plate (1); Two side frames (2), each of which is provided at two opposite ends of the bottom plate (1) along the first direction, and a portion of the side frame (2) is inserted into the through hole (13) so that the side frame (2) and the bottom plate (1) are spliced ​​into an integral structure; A hanging ear (3), each of the side frames (2) is provided with the hanging ear (3), and the hanging ear (3) is used to be connected to the entire vehicle.

2. The battery pack lower housing assembly according to claim 1, characterized in that: The side frame (2) comprises: A positioning member (22), the positioning member (22) being plug-fitted into the through hole (13); A mounting member (28), one end of the mounting member (28) being connected to the positioning member (22), and the other end of the mounting member (28) being directly or indirectly connected to the hanging ear (3); The locking members (24) are arranged on the mounting member (28) at intervals along a second direction that forms an angle with the first direction, and the locking members (24) are used to connect with accessories.

3. The battery pack lower housing assembly according to claim 2, characterized in that: The upper surface of the mounting member (28) is flush with the upper surface of the base plate (1); and / or the lower surface of the mounting member (28) is flush with the lower surface of the base plate (1).

4. The battery pack lower housing assembly according to claim 2, characterized in that: The battery pack lower shell assembly also includes a connecting member (27) connected to the mounting member (28), the connecting member (27) is located on a side of the mounting member (28) away from the positioning member (22), and the connecting member (27) is connected to the hanging ear (3).

5. The battery pack lower housing assembly according to claim 4, characterized in that: The battery pack lower shell assembly also includes a positioning protrusion (33) and a positioning groove (21) that cooperates with the positioning protrusion (33), wherein the positioning groove (21) is provided on one of the connecting piece (27) and the hanging ear (3), and the positioning protrusion (33) is connected to the other of the connecting piece (27) and the hanging ear (3).

6. The battery pack lower housing assembly according to any one of claims 1 to 5, characterized in that: The side frame (2) is detachably connected to the hanging ear (3), and the battery pack lower housing assembly further comprises: A bushing (32) connected to the side frame (2), the bushing (32) being provided with a first threaded through hole, the first threaded through hole extending along a second direction having an angle with the first direction; A wire screw sleeve (25) connected to the hanging ear (3), wherein the wire screw sleeve (25) is provided with a second threaded through hole extending along the second direction; A fastener passes through the first threaded through hole and is connected to the second threaded through hole.

7. The battery pack lower housing assembly according to any one of claims 1 to 5, characterized in that: The battery pack lower shell assembly comprises a plurality of bottom plates (1) arranged in sequence along a third direction, the third direction having an angle with the first direction, two adjacent bottom plates (1) being welded together, and both ends of the plurality of bottom plates (1) being arranged opposite to each other along the first direction are provided with side frames (2), the side frames (2) being welded together with the bottom plates (1), and a notch for avoiding the side frames (2) is provided on one side of the two adjacent bottom plates (1) that are in contact with each other.

8. The battery pack lower casing assembly according to any one of claims 1 to 5, characterized in that: The bottom plate (1) further comprises a reinforcing rib (12) disposed in the through hole (13) and connected to the bottom plate (1), the reinforcing rib (12) extending along the first direction, and avoidance notches are provided at opposite ends of the reinforcing rib (12) along the first direction, the avoidance notches being used to avoid the side frame (2); or, Along the first direction, there is a gap between the opposite ends of the reinforcing rib (12) and the corresponding ends of the bottom plate (1), and the length of the reinforcing rib (12) is smaller than the length of the bottom plate (1).

9. The battery pack lower housing assembly according to claim 8, characterized in that: The bottom plate (1) comprises a plurality of reinforcing ribs (12), wherein the plurality of reinforcing ribs (12) are arranged at intervals along a third direction, and the third direction forms an angle with the first direction.

10. A battery pack, characterized in that: A battery pack lower casing assembly according to any one of claims 1 to 9 is provided in the outer casing and comprises an outer casing.

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