Lower shell, battery pack and automobile

Abstract

The embodiment of the utility model provides a lower shell, a battery pack and an automobile, and relates to the technical field of battery packs. The lower shell comprises a bottom plate, a plug-in plate and a connecting beam, the plug-in plate is connected with the bottom plate, and the plug-in plate is used for installing an electrical plug connector and a water inlet and outlet pipe. The connecting beams are arranged on the periphery of the bottom plate; and the bottom plate, the plug-in plate and the connecting beam are jointly enclosed to form a battery cell mounting space. And by arranging the plug-in board, the electrical plug-in and the water inlet and outlet pipe can be integrated into one part, so that the installation time is saved, and the installation space can also be reduced. And by adopting the form of the bottom plate and the connecting beam, the structure of the lower shell is simplified, and the stability of the connection between the lower shell and the upper shell can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular, to a lower housing, a battery pack and an automobile. Background Art

[0002] As one of the core parts of an electric vehicle, the battery pack. The lower housing of the battery pack is an important structure for carrying all the components inside the battery pack and is also a structure fixedly connected to the whole vehicle.

[0003] However, most of the current lower housings do not integrate most of the plug connectors onto the lower housing. And due to the large size of electrical plug connectors such as high-voltage plug-ins, installing plug connectors such as electrical plug connectors requires a lot of installation space. In addition, the structure of the current lower housing is relatively complex and the installation time is long. Summary of the Utility Model

[0004] The utility model provides a lower housing, a battery pack and an automobile, which can simplify the structure of the lower housing, reduce the weight of the lower housing, reduce costs, and save installation space and installation time.

[0005] The embodiments of the utility model can be implemented as follows:

[0006] The embodiments of the utility model provide a lower housing, which includes:

[0007] A bottom plate;

[0008] A plug-in board, the plug-in board is connected to the bottom plate, and the plug-in board is used for installing electrical plug connectors and inlet and outlet water pipes;

[0009] A connecting beam, the connecting beam is arranged at the edge of the bottom plate; the bottom plate, the plug-in board and the connecting beam jointly enclose a battery cell installation space.

[0010] In an optional embodiment, a plurality of first mounting holes are formed in the connecting beam, and a rivet nut is arranged in each first mounting hole, and the rivet nut is used for connecting with the upper housing.

[0011] In an optional embodiment, at least one lifting point clamp block is arranged on the connecting beam, and at least one second mounting hole is formed in the lifting point clamp block; the lifting point clamp block is used for connecting the lower housing with an external structure.

[0012] In an optional embodiment, the connecting beam is in the shape of a square tube.

[0013] In an optional embodiment, the plug-in board includes a plug-in board body, a top edge and a bottom edge, the top end of the plug-in board is connected to the top edge, and the bottom end of the plug-in board is connected to the bottom edge; the top edge is used for connecting with the upper housing; both the top edge and the bottom edge are folded towards the battery cell installation space.

[0014] In an alternative embodiment, a boss is provided on one side of the plug-in board body close to the top edge.

[0015] In an alternative embodiment, a plurality of mounting protrusions are provided on the plug-in board body, and the mounting protrusions protrude along the thickness direction of the plug-in board body; a third mounting hole is provided at one end of the mounting protrusion away from the battery cell mounting space, and the third mounting hole is used for assembling the electrical plug-in connector.

[0016] In an alternative embodiment, the lower housing further includes at least one channel-shaped beam, the channel-shaped beam is connected to the bottom plate, and the channel-shaped beam is used for spacing the battery cell group.

[0017] An embodiment of the present invention further provides a battery pack, including an upper housing and the lower housing in any of the above embodiments, and the upper housing is connected to the plug-in board and the connecting beam.

[0018] An embodiment of the present invention further provides a vehicle, including a vehicle body and the battery pack in any of the above embodiments, and the battery pack is disposed in the vehicle body.

[0019] The beneficial effects of the lower housing, the battery pack and the vehicle according to the embodiments of the present invention include:

[0020] The lower housing includes a bottom plate, a plug-in board and a plurality of connecting beams. The plug-in board is connected to the bottom plate, and the plug-in board is used for installing electrical plug-in connectors and inlet and outlet water pipes. By providing the plug-in board, electrical plug-ins and inlet and outlet water pipes can be integrated together, saving installation time and also reducing the installation space. A plurality of connecting beams are disposed around the bottom plate; the bottom plate, the plug-in board and the connecting beams jointly enclose a battery cell mounting space. In the form of the bottom plate and the connecting beams, while simplifying the structure of the lower housing, the stability of the connection between the lower housing and the upper housing can also be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0022] Figure 1 A schematic diagram of the battery pack provided in the embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the first perspective of the lower housing provided in the embodiment of the present invention;

[0024] Figure 3 Schematic diagram of the second perspective of the lower housing provided in the embodiment of the present utility model;

[0025] Figure 4 Schematic diagram of the plug-in board provided in the embodiment of the present utility model;

[0026] Figure 5 Schematic diagram of the connecting beam provided in the embodiment of the present utility model.

[0027] Icons: 1000 - battery pack; 100 - lower housing; 110 - bottom plate; 120 - plug-in board; 121 - plug-in board body; 1211 - boss; 1212 - mounting projection; 12121 - third mounting hole; 122 - top edge; 123 - bottom edge; 130 - connecting beam; 131 - first mounting hole; 132 - rivet nut; 133 - lifting point clamp block; 1331 - second mounting hole; 140 - battery cell installation space; 150 - channel beam; 200 - upper housing; 300 - electrical connector. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0030] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0032] In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0033] It should be noted that, without conflict, the features in the embodiments of the present utility model can be combined with each other.

[0034] The battery pack is one of the core parts of an electric vehicle. The lower housing of the battery pack is an important structure that bears all the components inside the battery pack and is also a structure fixedly connected to the whole vehicle. However, most of the current lower housings do not integrate most of the plug-in connectors onto the lower housing. And due to the relatively large size of electrical plug-in connectors such as high-voltage plug-ins, installing plug-in connectors such as electrical plug-in connectors requires a lot of installation space. In addition, the current structure of the lower housing is relatively complex and the installation time is long.

[0035] Based on this, please refer to Figure 1 , Figure 2 and Figure 3 , in the embodiments of the present utility model, the lower housing 100 provided can effectively improve the above-mentioned technical problems. The lower housing 100 can simplify the structure of the lower housing 100, reduce the weight of the lower housing 100, reduce costs, and can save installation space and installation time. The lower housing 100 is applied to the battery pack 1000, and the battery pack 1000 can be applied to fields such as new energy vehicles. The battery pack 1000 and the vehicle with the lower housing 100 both have the functions possessed by the above-mentioned lower housing 100.

[0036] The vehicle in this embodiment includes a vehicle body and a battery pack 1000. The battery pack 1000 is arranged inside the vehicle body, and the battery pack 1000 provides electrical energy for the vehicle body to realize various functions of the vehicle body.

[0037] Figure 1 is a schematic diagram of the battery pack 1000 provided in the embodiments of the present utility model. As Figure 1 shown, the battery pack 1000 in the embodiments of the present utility model includes an upper housing 200 and a lower housing 100. The upper housing 200 is connected to the plug-in board 120 and the connecting beam 130. The upper housing 200 and the lower housing 100 together form an accommodating space, and structural components such as battery cells and liquid cooling components are all placed in this accommodating space.

[0038] The structure of the lower housing 100 will be introduced in detail below.

[0039] In order to simplify the structure of the lower housing 100 and save installation space, please refer to Figure 2 and Figure 3 , and in combination with Figure 4 , Figure 2 is a schematic diagram of the first perspective of the lower housing 100 provided in the embodiments of the present utility model. Figure 3 isFigure 2 Schematic diagram from another perspective; Figure 4 This is a schematic diagram of the plug-in board 120 provided in the embodiment of the present utility model. In this embodiment, the lower housing 100 includes a bottom plate 110, a plug-in board 120, and a connecting beam 130. The plug-in board 120 is connected to the bottom plate 110. The plug-in board 120 is used to install electrical connectors 300 and inlet and outlet water pipes. The connecting beam 130 is arranged at the edge of the bottom plate 110. The bottom plate 110, the plug-in board 120, and the connecting beam 130 jointly enclose a battery cell installation space 140. Specifically, the number of connecting beams 130 in this embodiment is three. Of course, the number of connecting beams 130 can also be one, two, etc., which is determined according to actual situations and is not limited herein. One side of the four sides of the bottom plate 110 is connected to the plug-in board 120, and the remaining three sides are all connected to the connecting beam 130. To ensure the stability of the connection of the plug-in board 120, in this embodiment, one end of the plug-in board 120 is connected to one connecting beam 130, the other end of the plug-in board 120 is connected to another connecting beam 130, and the bottom of the plug-in board 120 is connected to the bottom plate 110. Specifically, the plug-in board is connected to the bottom plate 110, the connecting beam 130 is connected to the bottom plate 110, and the connecting beam 130 is connected to the plug-in board by welding. Of course, in addition to using the welding method, fasteners such as bolts or snap connections can also be used, which is not limited herein.

[0040] By providing the plug-in board 120, electrical plugs and inlet and outlet water pipes can be integrated into one place, saving installation time and also reducing the installation space. In the form of the bottom plate 110 and the connecting beam 130, while simplifying the structure of the lower housing 100, the stability of the connection between the lower housing 100 and the upper housing 200 can also be ensured.

[0041] In order to integrate as many electrical connectors 300 and water pipe joints as possible on the plug-in board 120, please continue to refer to Figure 2 and Figure 3 and in combination with Figure 4 , in this embodiment, the plug-in board 120 includes a plug-in board body 121, a top edge 122, and a bottom edge 123. The top end of the plug-in board 120 is connected to the top edge 122, and the bottom end of the plug-in board 120 is connected to the bottom edge 123. The top edge 122 is used to connect to the upper housing 200. Both the top edge 122 and the bottom edge 123 are folded towards the battery cell installation space 140. By using the plug-in board 120 with the top edge 122 and the bottom edge 123 folded inwards, interference between the top edge 122 and the bottom edge 123 and the electrical connectors 300 can be prevented, thereby avoiding the situation where some electrical connectors 300 cannot be installed on the plug-in board of the same size. A plurality of connector installation holes are provided on the plug-in board body 121 of this embodiment. The connector installation holes are used to install a plurality of electrical connectors 300 such as high-voltage plugs and low-voltage plugs, or water pipe joints. The electrical connectors 300 are connected to the plug-in board 120 by threaded fasteners such as bolts.

[0042] To avoid the installation space of the upper housing 200, please refer to Figure 2 and Figure 3 and, in combination with Figure 4 , on one side of the plug-in board body 121 close to the top edge 122 in this embodiment, there is a boss 1211. The boss 1211 is parallel to the bottom edge 123. The setting of the boss 1211 can avoid the space for connecting fasteners such as bolts between the top edge 122 and the upper housing 200, and can also avoid part of the connection space where the plug-in components are connected to the plug-in board.

[0043] To save the installation space, please continue to refer to Figure 2 and Figure 3 and, in combination with Figure 4 , on the plug-in board body 121 in this embodiment, there are a plurality of installation protrusions 1212. The installation protrusions 1212 protrude along the thickness direction of the plug-in board body 121; at one end of the installation protrusion 1212 away from the battery cell installation space 140, there is a third installation hole 12121 for assembling the electrical plug-in component 300. By setting the installation protrusions 1212 and providing the third installation holes 12121 in the installation protrusions 1212, the installation space can be saved while strengthening the strength of the connection structure.

[0044] To increase the structural strength of the bottom plate 110 and facilitate the limiting and fixing of the battery cell group, please refer to Figure 2 and Figure 3 , the lower housing 100 in this embodiment further includes at least one U-shaped beam 150. The U-shaped beam 150 is connected to the bottom plate 110 and is used to space the battery cell group. Of course, the U-shaped beam 150 can also be designed in other shapes, such as a cuboid shape, etc., which is not limited herein. In this embodiment, the U-shaped beam 150 is spot-welded to the bottom plate 110 and is welded to the connecting beam 130 to improve the connection strength. Of course, other connection methods such as connecting with threaded fasteners such as bolts can also be used, which is not limited herein.

[0045] Figure 5 The following is a schematic diagram of the connecting beam 130 provided in the embodiment of the present invention. Please refer to Figure 5 and, in combination with Figure 2 and Figure 3, to facilitate the installation and disassembly of the lower housing 100 and subsequent maintenance, in this embodiment, a plurality of first mounting holes 131 are formed in each connecting beam 130, and a rivet nut 132 is disposed in each first mounting hole 131. The rivet nut 132 is used to connect with the upper housing 200. The use of the rivet nut 132 can achieve a high-strength connection between the upper and lower housings 100. Moreover, the rivet nut 132 is not easily loosened and has characteristics such as waterproof and oil-proof, which can ensure the sealing performance of the connection between the upper and lower housings 100 and extend the service life of the battery pack 1000. In addition, the use of the rivet nut 132 for connection can simplify the installation process, save installation time, and thus reduce production costs. Of course, in addition to using the rivet nut 132 to connect the upper and lower housings 100, other connection methods such as welding, snap connection, or other threaded fasteners can also be used, which are not limited herein.

[0046] To facilitate the connection of the lower housing 100 to other external structures, please continue to refer to Figure 5 , and in combination with Figure 2 and Figure 3 , at least one lifting point clamp 133 is provided on the connecting beam 130 in this embodiment. At least one second mounting hole 1331 is formed in the lifting point clamp 133; the lifting point clamp 133 is used to connect the lower housing 100 to an external structure. By providing the lifting point clamp 133, the connection strength at the joint between the lower housing 100 and other external structures is enhanced, and it is also convenient for disassembly and installation. Of course, the connection between the lower housing 100 and other external structures can also be achieved by welding, clamping, etc., which are not limited herein.

[0047] To save materials and reduce the weight of the lower housing 100, the connecting beam 130 in this embodiment is a square tube. Of course, the connecting beam 130 can also be designed as other hollow structures, and the connecting beam 130 can also be designed in the shape of a cylindrical tube, etc. The corresponding connection parts of the upper housing 200 also need to be designed in a matching shape. In addition, the connecting beam 130 can also be designed as a solid structure to increase the structural strength of the lower housing 100. The specific situation is determined according to actual usage requirements, which are not limited herein.

[0048] To simplify the processing process, reduce production time, and lower production costs, the upper housing 200 in this embodiment is made in the form of stamping sheet metal parts welded together, and the bottom plate 110 is made by stamping. Of course, the upper housing 200 and the lower housing 100 can also be made by other methods, which are not limited herein. The channel beam 150 in this embodiment is roll-formed. Of course, the channel beam 150 can also be made by other processing methods, which are not limited herein.

[0049] In summary, the lower housing 100 includes a bottom plate 110, a plug-in board 120, and a plurality of connecting beams 130. The plug-in board 120 is connected to the bottom plate 110 and is used for installing electrical connectors 300 and inlet and outlet water pipes. The plurality of connecting beams 130 are arranged at the edge of the bottom plate 110. The bottom plate 110, the plug-in board 120, and the connecting beams 130 together enclose a battery cell installation space 140. By providing the plug-in board 120, the electrical connectors and the inlet and outlet water pipes can be integrated in one place, saving installation time and also reducing the installation space. In the form of the bottom plate 110 and the connecting beams 130, while simplifying the structure of the lower housing 100, the stability of the connection between the lower housing 100 and the upper housing 200 can also be ensured.

[0050] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A lower housing, characterized in that a bottom plate (110); a plug-in board (120), the plug-in board (120) is connected to the bottom plate (110), and the plug-in board (120) is used for installing electrical connectors (300) and inlet and outlet water pipes; a connecting beam (130), the connecting beam (130) is arranged at the edge of the bottom plate (110); the bottom plate (110), the plug-in board (120) and the connecting beam (130) jointly enclose a battery cell installation space (140).

2. The lower housing according to claim 1, wherein, A plurality of first mounting holes (131) are formed in the connecting beam (130), and a rivet nut (132) is arranged in each first mounting hole (131), and the rivet nut (132) is used for connecting with the upper housing (200).

3. The lower housing according to claim 1, wherein At least one lifting point clamp block (133) is arranged on the connecting beam (130), and at least one second mounting hole (1331) is formed in the lifting point clamp block (133); the lifting point clamp block (133) is used for connecting the lower housing (100) with an external structure.

4. The lower housing according to claim 1, characterized in that, The connecting beam (130) is in the shape of a square tube.

5. The lower housing according to claim 1, characterized in that, The plug-in board (120) includes a plug-in board body (121), a top edge (122) and a bottom edge (123), the top end of the plug-in board (120) is connected to the top edge (122), and the bottom end of the plug-in board (120) is connected to the bottom edge (123); the top edge (122) is used for connecting with the upper housing (200); both the top edge (122) and the bottom edge (123) are folded towards the battery cell installation space (140).

6. The lower housing according to claim 5, wherein, A boss (1211) is arranged on one side of the plug-in board body (121) close to the top edge (122).

7. The lower housing according to claim 5, characterized in that, A plurality of mounting protrusions (1212) are arranged on the plug-in board body (121), and the mounting protrusions (1212) protrude along the thickness direction of the plug-in board body (121); a third mounting hole (12121) is formed at one end of the mounting protrusion (1212) far from the battery cell installation space (140), and the third mounting hole (12121) is used for assembling the electrical connector (300).

8. The lower housing according to claim 1, characterized in that, The lower housing (100) further includes at least one channel-shaped beam (150), the channel-shaped beam (150) is connected to the bottom plate (110), and the channel-shaped beam (150) is used for spacing battery cell groups.

9. A battery pack, characterized in that, It includes an upper housing (200) and the lower housing (100) according to any one of claims 1-8, and the upper housing (200) is connected to the plug-in board (120) and the connecting beam (130).

10. A vehicle, characterized in that, It includes a vehicle body and the battery pack (1000) according to claim 9, and the battery pack (1000) is arranged in the vehicle body.

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