Battery lower box body and battery pack

Abstract

The utility model relates to a battery lower box and battery pack, the battery lower box comprises a bottom guard plate and an inner frame, the bottom guard plate is provided with a plurality of mounting columns, the inner frame is provided with a plurality of positioning holes, and the mounting columns and the positioning holes are positioned and matched in a one-to-one correspondence manner, so that the inner frame is positioned and mounted on the bottom guard plate. According to the utility model, the positioning columns on the bottom protective plate can be matched with the positioning holes in the inner frame in a positioning manner, so that the quick alignment and alignment of connecting points of the inner frame and the bottom protective plate are facilitated, and the mounting efficiency of the lower box body of the battery is improved. And meanwhile, the mounting columns can play a supporting role, so that the structural strength of the inner frame and the overall structural strength of the battery lower box body can be improved.

Description

Technical Field

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

[0002] The battery box is an important structure of the battery, which is used to protect the battery from collision, has the function of insulation and waterproofing, and can also assist the battery in ventilation and heat dissipation. At present, in order to allow multiple battery modules to be placed separately in the battery box, the lower box is formed with multiple accommodating spaces through a beam structure or a frame structure.

[0003] CN214672835U discloses a power battery lower box and a power battery pack, wherein the power battery lower box includes a bottom plate assembly, an outer frame assembly, a first reinforcement member, a reinforcement assembly and a first transverse reinforcement beam, wherein the reinforcement assembly includes a plurality of transverse beams and a plurality of longitudinal reinforcement beams, and the transverse beams and longitudinal beams divide the power battery lower box into three accommodating spaces, each of which can be respectively installed with a battery module, and the battery modules in each accommodating space are connected in series to supply power to the vehicle. However, in the above patent, since there are many connection points between the bottom plate assembly and the transverse beams and longitudinal beams, in the process of installing the transverse beams and longitudinal beams, it is necessary to align the connection points between each beam and the bottom plate assembly one by one, making the installation process cumbersome and time-consuming, and reducing the assembly efficiency of the battery lower box. Utility Model Content

[0004] One of the purposes of the utility model is to provide a battery lower box, which is convenient for positioning and installing the frame structure in the battery lower box and improving the assembly efficiency of the battery lower box; the second purpose is to provide a battery pack.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] In the first aspect, the utility model provides a battery lower box, including a bottom guard plate and an inner frame, the bottom guard plate is provided with a plurality of mounting columns, the inner frame is provided with a plurality of positioning holes, the mounting columns are positioned and matched with the positioning holes one by one, so that the inner frame is positioned and installed on the bottom guard plate.

[0007] According to the above technical means, since the positioning columns on the bottom guard plate and the positioning holes on the inner frame can be positioned and matched, it is helpful to quickly align and align the connection points between the inner frame and the bottom guard plate, thereby improving the installation efficiency of the inner frame. At the same time, the installation columns can play a supporting role, which is conducive to improving the overall structural strength of the battery lower box and increasing the structural strength of the inner frame.

[0008] Furthermore, the bottom guard plate is provided with a plurality of reinforcing ribs at intervals in parallel.

[0009] According to the above technical means, it is beneficial to improve the structural strength of the bottom guard plate, thereby improving the structural strength of the lower box body.

[0010] Furthermore, the inner frame includes connected cross beams and longitudinal beams, and the cross beams and the longitudinal beams are perpendicular to each other.

[0011] According to the above technical means, a space for installing multiple battery modules can be defined between the cross beam and the longitudinal beam.

[0012] Furthermore, the cross beam is welded to the longitudinal beam, and a connecting piece is provided between the cross beam and the longitudinal beam, and the connecting piece is respectively connected to the cross beam and the longitudinal beam through rivet nuts.

[0013] According to the above technical means, the strength of the connection structure between the cross beam and the longitudinal beam can be further strengthened by the connecting piece.

[0014] Furthermore, along the longitudinal direction of the bottom guard plate, mounting supports are provided on opposite sides of the bottom guard plate, and the mounting supports are overlapped with the inner frame.

[0015] According to the above technical means, the inner frame is supported and installation space is provided by installing support members at the edge of the bottom guard plate, which is also helpful to improve the structural strength of the edge of the bottom guard plate.

[0016] Furthermore, the bottom guard plate is provided with an outer frame along its edge, and the outer frame is integrally formed with the bottom guard plate.

[0017] According to the above technical means, the outer frame and the bottom guard plate are integrally formed, thereby avoiding the sealing structure between the split outer frame and the bottom guard plate and reducing the sealing cost.

[0018] Furthermore, the outer frame includes transverse brackets located on both longitudinal sides of the bottom guard plate, and longitudinal brackets located on both transverse sides of the bottom guard plate; transverse bracket reinforcements are provided on both longitudinal sides of the bottom guard plate, and longitudinal bracket reinforcements are provided on both transverse sides of the bottom guard plate.

[0019] According to the above technical means, the structural strength of the bracket can be improved by using the transverse bracket reinforcement and the longitudinal bracket reinforcement.

[0020] Furthermore, a plurality of support frames for mounting electrical components are provided between the inner frame and the outer frame, and the plurality of support frames are arranged in parallel and at intervals along the bottom guard plate.

[0021] According to the above technical means, multiple support frames can provide installation space for installing other electrical components.

[0022] Furthermore, the bottom guard plate is connected to the outer frame bolts.

[0023] In a second aspect, the utility model provides a battery pack having the above-mentioned battery lower box.

[0024] According to the above technical means, the lower box part of the battery pack is easy to install, which is conducive to improving installation efficiency.

[0025] Beneficial effects of the utility model:

[0026] (1) The utility model is provided with a plurality of mounting posts on the bottom guard plate and a plurality of positioning holes on the inner frame. The mounting posts are positioned and matched with the positioning holes so that the inner frame is in a predetermined mounting position, avoiding the need to align the connection points of the inner frame with the corresponding connection points on the bottom guard plate one by one, thereby improving the installation efficiency of the inner frame.

[0027] (2) The mounting columns on the bottom guard plate of the utility model can support the inner frame and strengthen the connection strength between the inner frame and the bottom guard plate, thereby helping to improve the overall modal and random vibration performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 An exploded view of the lower battery box of an embodiment of the present application;

[0029] Figure 2 A schematic diagram of a bottom guard plate according to an embodiment of the present application;

[0030] Figure 3 A schematic diagram of an inner frame and a support frame of an embodiment of the present application;

[0031] Figure 4 This is a schematic diagram of the installation of the support frame according to an embodiment of the present application.

[0032] Reference numerals in the figure: 100-bottom guard plate; 101-installation column; 102-transverse bracket reinforcement; 103-longitudinal bracket reinforcement; 104-installation support; 105-support frame; 200-inner frame; 201-positioning hole; 202-connecting piece; 210-longitudinal beam; 220-cross beam; 300-outer frame, 301-transverse bracket; 302-longitudinal bracket. DETAILED DESCRIPTION

[0033] The following will describe the implementation of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0034] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the utility model, and the drawings only show the components related to the utility model rather than the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be changed at will, and the component layout type may also be more complicated. It should be noted that the battery lower box of the embodiment of the present application has a longitudinal direction and a transverse direction, the longitudinal direction is the X direction shown in the drawings, and the transverse direction is the Y direction shown in the drawings.

[0035] See also Figures 1 to 3 This embodiment proposes a battery lower box, including a bottom guard plate 100, an inner frame 200 and an outer frame 300. The bottom guard plate 100 is provided with a plurality of mounting columns 101, and the inner frame 200 is provided with a plurality of positioning holes 201. The mounting columns 101 are positioned and matched with the positioning holes 201 in a one-to-one correspondence, so that the inner frame 200 is positioned and installed on the bottom guard plate 100.

[0036] The lower battery box is part of the power battery pack and provides a bearing foundation for the installation of components such as battery cells, high-voltage boxes, and wiring harnesses. In the installation process of the inner frame 200 of this embodiment, the inner frame 200 can be placed in a predetermined installation position only by positioning the mounting column 101 with the positioning hole 201, which can effectively avoid the need to specifically adjust the multiple connection points between the bottom guard plate 100 and the inner frame 200 to align one by one, thereby reducing the installation workload of the inner frame 200 and helping to improve the installation efficiency of the lower battery box. In addition, the mounting column 101 can support the inner frame 200 or other battery components, which is beneficial to improving the structural strength of the inner frame and the overall structural strength of the lower battery box, as well as improving the strength of the connection structure between the bottom guard plate 100 and the inner frame 200.

[0037] Optionally, the inner frame 200 is mounted on the bottom guard plate 100 by bolts to achieve fixed connection with the bottom guard plate 100. The bolt installation position is not limited to the inner frame 200 and the bottom guard plate 100, and a bolt installation position can also be set between the inner frame 200 and the mounting column 101. The bottom guard plate 100 is made of hot-formed steel. The bottom guard plate 100 made of hot-formed steel can effectively improve the random vibration and extrusion resistance of the battery, while improving the bottom's impact resistance. In order to comply with the lightweight design, the inner frame 200 is made of aluminum alloy, which is beneficial to reducing the weight of the lower box of the battery. In some embodiments of the present application, the bottom guard plate 100 is provided with a plurality of reinforcing ribs at parallel intervals, which is beneficial to improve the structural strength of the bottom guard plate 100, thereby improving the structural strength of the lower box. Optionally, a plurality of reinforcing ribs are arranged on the bottom guard plate 100 in parallel and at intervals along the longitudinal direction of the lower box.

[0038] In some embodiments of this application, please refer to Figure 2, the inner frame 200 includes a connected cross beam 220 and longitudinal beams 210. The cross beam 220 and the longitudinal beams 210 are perpendicular to each other, thereby forming a space for placing a plurality of battery modules. The exemplary inner frame 200 can set the number of cross beams 220 and the number of longitudinal beams 210 according to actual needs, so that the inner frame 200 presents shapes such as a "king" character, a "#", a "cross", etc.

[0039] In some embodiments of the present application, the cross beam 220 and the longitudinal beams 210 are welded together, and a connecting member 202 is provided between the cross beam 220 and the longitudinal beams 210. The connecting member 202 is respectively connected to the cross beam 220 and the longitudinal beams 210 through rivet nuts. The connecting member 202 can further strengthen the strength of the connection structure between the cross beam 220 and the longitudinal beams 210. Exemplarily, the connecting member 202 is in a plate shape. The plate-shaped connecting member 202 covers the connection part between the cross beam 220 and the longitudinal beams 210, and it is respectively connected to the cross beam 220 and the longitudinal beams 210 through rivet nuts. In this way, the strength of the connection structure between the cross beam 220 and the longitudinal beams 210 can be further strengthened.

[0040] In some embodiments of the present application, please refer to Figure 3 , along the longitudinal direction of the bottom guard plate 100, installation supports 104 are provided on opposite sides of the bottom guard plate 100. The installation supports 104 are in lap joint with the inner frame 200. The installation supports 104 provide an installation space for the inner frame 200 at the edge of the bottom guard plate 100, so that the ends of the cross beam 220 or the longitudinal beams 210 in the inner frame 200 can be installed. At the same time, the installation supports 104 are arranged along the edge of the bottom guard plate 100, which is beneficial to improving the structural strength of the edge of the bottom guard plate 100.

[0041] In some embodiments of the present application, an outer frame 300 is provided along the edge of the bottom guard plate 100, and the outer frame 300 is integrally formed with the bottom guard plate 100, which is beneficial to ensuring the structural strength of the lower box body.

[0042] In some embodiments of the present application, the outer frame 300 includes transverse brackets 301 located on both longitudinal sides of the bottom guard plate 100, and longitudinal brackets 302 located on both transverse sides of the bottom guard plate 100; transverse bracket strengthening members 102 are provided on both longitudinal sides of the bottom guard plate 100, and longitudinal bracket strengthening members 103 are provided on both transverse sides of the bottom guard plate 100. The transverse bracket strengthening members 102 support the transverse brackets 301, and the longitudinal bracket strengthening members 103 support the longitudinal brackets 302, thereby improving the structural strength of the brackets.

[0043] In some embodiments of the present application, please refer to Figure 4A plurality of support frames 105 for installing electrical components are provided between the inner frame 200 and the outer frame 300, and the plurality of support frames 105 are arranged in parallel and spaced apart along the bottom guard plate 100. The plurality of support frames 105 can together form a bearing platform for installing electrical components such as high-energy boxes and battery control systems. Optionally, the bottom guard plate 100 is provided with mounting columns 101 corresponding to the support frames 105, and the support frames 105 are provided with positioning mounting holes, and each support frame 105 is positioned and installed on each mounting column 101, and is welded to the crossbeam 220 of the inner frame 200.

[0044] The embodiment of the present application also provides a battery pack, including the battery lower box of any of the above solutions. Therefore, the battery pack of the embodiment of the present application has the beneficial effects of the battery lower box of any of the above solutions, which will not be repeated here. Through the above analysis, it can be seen that the battery lower box of the embodiment of the present application realizes the rapid installation of the inner frame 200 through the installation column 101 and the positioning hole 201, which is conducive to improving the installation efficiency of the battery pack.

[0045] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A battery lower box, characterized in that: The invention comprises a bottom guard plate (100) and an inner frame (200), wherein the bottom guard plate (100) is provided with a plurality of mounting columns (101), and the inner frame (200) is provided with a plurality of positioning holes (201), and the mounting columns (101) are positioned and matched with the positioning holes (201) in a one-to-one correspondence, so that the inner frame (200) is positioned and mounted on the bottom guard plate (100).

2. The battery lower box according to claim 1, characterized in that: The bottom guard plate (100) is provided with a plurality of reinforcing ribs in parallel and at intervals.

3. The battery lower box according to claim 1, characterized in that: The inner frame (200) comprises a connected crossbeam (220) and a longitudinal beam (210), wherein the crossbeam (220) and the longitudinal beam (210) are perpendicular to each other.

4. The battery lower box according to claim 3, characterized in that: The cross beam (220) is welded to the longitudinal beam (210), and a connecting piece (202) is provided between the cross beam (220) and the longitudinal beam (210), and the connecting piece (202) is respectively connected to the cross beam (220) and the longitudinal beam (210) through rivet nuts.

5. The battery lower box according to claim 1, characterized in that: Along the longitudinal direction of the bottom guard plate (100), mounting support members (104) are provided on opposite sides of the bottom guard plate (100), and the mounting support members (104) overlap and cooperate with the inner frame (200).

6. The battery lower box according to claim 1, characterized in that: The bottom guard plate (100) is provided with an outer frame (300) along its edge, and the outer frame (300) is integrally formed with the bottom guard plate (100).

7. The battery lower case according to claim 6, characterized in that: The outer frame (300) comprises transverse brackets (301) located on both longitudinal sides of the bottom guard plate (100), and longitudinal brackets (302) located on both transverse sides of the bottom guard plate (100); transverse bracket reinforcements (102) are provided on both longitudinal sides of the bottom guard plate (100), and longitudinal bracket reinforcements (103) are provided on both transverse sides of the bottom guard plate (100).

8. The battery lower box according to claim 6, characterized in that: A plurality of support frames (105) for mounting electrical components are provided between the inner frame (200) and the outer frame (300), and the plurality of support frames (105) are arranged in parallel and at intervals along the bottom guard plate (100) in a transverse direction.

9. The battery lower case according to claim 1, characterized in that: The bottom guard plate (100) and the outer frame (300) are connected by bolts.

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

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