Battery installation box, battery box and electric excavator

Abstract

The present invention relates to a battery box, in particular to a battery installation box. It includes a lower box body structure, at least one middle box body structure and an upper box body structure. Cavities for installing battery packs are provided in the lower box body structure, the middle box body structure and the upper box body structure. The lower box body structure is detachably connected to the middle box body structure, between adjacent middle box body structures, and between the middle box body structure and the upper box body structure respectively through connection components. An installation plate is installed on the side of the installation box structure formed by superimposing the lower box body structure, the middle box body structure and the upper box body structure to form a closed structure. The present invention has the advantages of simple structure and convenient disassembly and assembly. At the same time, the battery installation box has a good heat insulation function, which can extend the service life of the battery pack. In addition, the present invention also relates to a battery box and an electric excavator including the battery installation box.

Description

Technical Field

[0001] The present invention relates to a battery box, and more specifically, to a battery installation box. In addition, the present invention also relates to a battery box and an electric excavator including the battery installation box. Background Art

[0002] In recent years, with the increasingly tight oil resources and the deepening environmental problems, China has paid more and more attention to energy conservation and emission reduction. Electric excavators with zero emissions and low noise have become new market competition points. Electric excavators use a combination of motors and batteries to replace traditional fuel engines, and the kinetic energy is provided by storage batteries and drive motors. Compared with traditional fuel excavators, they are more energy-efficient and achieve low noise and zero emissions. They are especially suitable for working conditions such as urban areas, tunnels, and plateaus. In order to ensure sufficient battery life, a relatively large volume of storage batteries need to be placed in the overall machine layout. Currently, the battery packs used in excavators on the market are generally large in size and heavy in weight. In addition, due to the high requirements for the storage conditions of batteries, if the battery assembly is inconvenient or subsequent failures occur, it will seriously affect the service life of the batteries and cause unnecessary waste of manpower and material resources. Therefore, a reasonable battery assembly structure can not only ensure sufficient assembly and maintenance space, but also ensure the stability of the batteries after assembly.

[0003] Therefore, how to make the structure of the battery installation box simple, the installation convenient, and the weight light has become an urgent technical problem to be solved in the related technical fields. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a battery installation box, which has the advantages of simple structure and convenient disassembly and assembly. At the same time, the battery installation box has a good heat insulation function, which can extend the service life of the battery pack.

[0005] To solve the above technical problems, on the one hand, the present invention provides a battery installation box, including a lower box body structure, at least one middle box body structure, and an upper box body structure. Cavities for installing battery packs are provided in the lower box body structure, the middle box body structure, and the upper box body structure. The lower box body structure is detachably connected to the middle box body structure, between adjacent middle box body structures, and between the middle box body structure and the upper box body structure respectively through connection components. Mounting plates are installed on the sides of the installation box structure formed by stacking the lower box body structure, the middle box body structure, and the upper box body structure to form a closed structure.

[0006] Preferably, a structure strengthening component is further provided between the middle box body structure and the lower box body structure.

[0007] Preferably, heat-insulating sponges capable of heat preservation and insulation are attached inside the mounting plate, the lower-layer box body structure, the middle-layer box body structure, and the upper-layer box body structure.

[0008] More preferably, the lower-layer box body structure includes a bottom plate and a plurality of lower-layer vertical plates. The lower-layer vertical plates are vertically installed on the bottom plate to form a semi-enclosed box body structure with a cavity. A bracket for connecting and mounting the mounting plate is provided on the upper surface of the bottom plate.

[0009] Specifically, the middle-layer box body structure includes a middle-layer mounting plate and a plurality of middle-layer vertical plates. The middle-layer vertical plates are vertically arranged on the middle-layer mounting plate to form a semi-enclosed box body structure with a cavity.

[0010] More specifically, the middle-layer box body structure is an integrally formed part.

[0011] Further, the upper-layer box body structure includes an upper-layer mounting plate and an upper cover. The upper cover is installed on the upper-layer mounting plate to seal the battery pack installed inside the upper-layer box body structure. An installation bracket for connecting with the mounting plate is also provided on the upper cover.

[0012] Further, the connection assembly includes a plurality of connection brackets, a plurality of connection plates, and a plurality of connectors capable of connecting the connection brackets and the connection plates. The connection brackets and the connection plates are respectively arranged on the outer surfaces of the lower-layer vertical plates, the middle-layer vertical plates, and the upper cover.

[0013] Further, the structure strengthening assembly includes a plurality of strengthening beams, a plurality of strengthening beam mounting plates for installing the strengthening beams, and strengthening beam connectors for connecting the strengthening beams and the strengthening beam mounting plates.

[0014] Further, a plurality of lifting rings for connecting the connection brackets and the connection plates are also provided between the upper-layer box body structure and the middle-layer box body structure.

[0015] Further, lug structures for fixedly installing with the connection brackets are provided on the sides of the middle-layer mounting plate and the upper-layer mounting plate.

[0016] On the other hand, the present invention also discloses a battery box, including the battery installation box in any one of the above technical solutions and a battery pack installed in the battery installation box. The battery installation box is installed on a slewing platform through shock absorbers.

[0017] The present invention further discloses an electric excavator, including the battery box in the above technical solution.

[0018] Through the above technical solutions, the beneficial effects of the present invention are as follows:

[0019] A battery installation box provided by the present invention forms an installation box structure in a stacked form by setting a multi-layer box body structure, mainly including an upper box body structure, at least one middle box body structure, and a lower box body structure. Cavities for installing battery packs are provided in the upper box body structure, the middle box body structure, and the lower box body structure. Moreover, the upper box body structure and the middle box body structure, adjacent box body structures, or the lower box body structure and the middle box body structure can be connected by detachable connection components. In order to make the battery installation box of the present invention a sealed box body structure, mounting plates are also provided on the sides of the box body structure formed by stacking the upper box body structure, the middle box body structure, and the lower box body structure. The mounting plates are installed at the line assembly end of the battery pack, facilitating the later maintenance and repair of the battery lines and the like. The structure of the present invention is simple and convenient to disassemble and assemble.

[0020] Secondly, in order to make the installation between the lower box body structure and the middle box body structure more stable, a structure strengthening component is provided between the lower box body structure and the middle box body structure.

[0021] In addition, in order to make the battery installation box of the present invention have a good heat insulation and heat preservation effect, heat insulation sponges for heat insulation are pasted in the lower box body structure, the middle box body structure, and the upper box body structure.

[0022] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the drawings:

[0024] Figure 1 is a schematic diagram of the overall structure of the specific implementation of the battery installation box of the present invention;

[0025] Figure 2 is a schematic diagram of the split structure of each component of the specific implementation of the battery installation box of the present invention;

[0026] Figure 3 is a schematic diagram of the mechanism with a battery pack installed in the specific implementation of the battery installation box of the present invention;

[0027] Figure 4 is a schematic diagram of the structure with a lifting ring installed in the specific implementation of the battery installation box of the present invention.

[0028] DESCRIPTION OF THE REFERENCE NUMERALS

[0029] 1 Lower box body structure 10 Upper cover

[0030] 11 Bottom plate 12 Reinforcing plate

[0031] 13 Lower vertical plate 15 Mounting plate

[0032] 17 Shock absorber

[0033] 2 Connecting assembly

[0034] 21 Connecting bracket 22 Connecting plate

[0035] 23 Connecting piece 24 Suspension ring

[0036] 25 Lug structure 26 Hollow structure

[0037] 3 Structure strengthening assembly

[0038] 31 Reinforcing beam 32 Reinforcing beam connecting piece

[0039] 33 Reinforcing beam mounting plate 4 Battery pack

[0040] 5 Nut 51 Through hole

[0041] 6 Gasket

[0042] 7 Middle layer box structure

[0043] 71 Middle layer mounting plate 72 Middle layer vertical plate

[0044] 8 Heat insulating sponge 9 Upper layer box structure

[0045] 91 Upper layer mounting plate 101 Mounting bracket Specific embodiments

[0046] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present invention, and the protection scope of the present invention is not limited to the following specific embodiments.

[0047] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "set", "provided with", "installed", "connected" should be understood in a broad sense. For example, the connection can be a direct connection, or an indirect connection through an intermediate medium, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate connecting piece, it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise specified, the orientation terms such as "upper", "middle", "lower", "side", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention; for the orientation terms of the present invention, they should be understood in combination with the actual installation state.

[0049] See Figure 1 , the present invention provides a battery installation box, which adopts a layered structure and is installed in a stacked manner. It includes a lower box body structure 1, at least one middle box body structure 7, and an upper box body structure 9. The interiors of the lower box body structure 1, the middle box body structure 7, and the upper box body structure 9 all have cavities that can be used to install the battery pack 4. The connecting component 2 can be used to connect the upper box body structure 9 and the middle box body structure 7, two adjacent middle box body structures 7, or the lower box body structure 1 and the middle box body structure 7. By stacking, the lower box body structure 1, the middle box body structure 7, and the upper box body structure 9 form a complete installation box structure. An installation plate 15 is also installed on the side of the installation box structure to make the installation box structure a closed structure. Among them, the way that the various box body structures are stacked to form the overall installation box of the battery installation box makes the battery installation box of the present invention simpler in structure compared with the prior art. The connection method using the connecting component 2 makes the installation and disassembly of the present invention more convenient. Using the installation plate 15 to close the installation box structure formed by assembling the various box body structures not only makes the battery installation box structure of the present invention more stable, but also makes the usage environment of the battery pack 4 safer after the battery pack 4 is installed. In addition, the installation plate 15 is installed at the line assembly end of the battery pack 4 and is an assembled installation plate, which can facilitate the subsequent maintenance and repair of the battery pack 4.

[0050] In order to enhance the anti-torsion performance of the present invention, a structural strengthening component 3 is also provided between the middle box body structure 7 and the lower box body structure 1 of the present invention. The structural strengthening component 3 can strengthen the installation and fixation of the middle box body structure 7 and the lower box body structure 1, enhance their structural strength, and prevent the battery installation box of the present invention from becoming loose during use.

[0051] In addition, heat-insulating sponges 8 are provided inside the mounting plate 15, the lower-layer box body structure 1, the middle-layer box body structure 7, and the upper-layer box body structure 9. The heat-insulating sponges 8 provide the functions of heat insulation and heat preservation for the battery mounting box of the present invention, effectively protecting the battery pack 4 installed in the battery mounting box of the present invention and extending the service life of the battery pack 4. It can be understood that the installation position of the heat-insulating sponge 8 can be installed as a sandwich on the contact surfaces between the lower-layer box body structure 1, the middle-layer box body structure 7, and the upper-layer box body structure 9, or can be provided on the inner and outer working surfaces of the mounting plate 15. Here, the "inner and outer working surfaces" can be understood as the working surfaces of the mounting plate 15 facing each box body structure and the working surfaces of the mounting plate 15 facing away from each box body structure. In addition, for the installation method of the heat-insulating sponge 8, it can be directly attached to the required working surfaces using a thermally conductive structural adhesive, or can be fixed using bolts, which is convenient for future replacement and maintenance.

[0052] It should be noted that the number of the middle-layer box body structures 7 in the present invention can be one, two, or more, and the specific number is determined by the number of battery packs 4 to be installed and the power consumption.

[0053] See Figure 2 , as a specific implementation manner of the present invention, the lower-layer box body structure 1 of the present invention is composed of a plurality of lower-layer vertical plates 13 and a bottom plate 11. The lower-layer vertical plates 13 are vertically installed on the bottom plate 11 to form a semi-enclosed box body structure with a cavity. A bracket 101 for connecting the mounting plate 15 is provided on the upper surface of the bottom plate 11. It can be understood that in the above technical solution, the terms "upper surface" and "lower surface" respectively refer to the working surface of the bottom plate 11 facing the battery pack 4 or the vertical plate 13 as the upper surface, and the working surface of the bottom plate 11 facing away from the battery pack 4 or the vertical plate as the lower surface. Among them, it should be noted that the connection method between the vertical plate 13 and the bottom plate 11 can be a welding connection or a fastener installation, etc. The structure of the lower-layer box body structure 1 is simple, easy to install, and has strong functionality.

[0054] As Figure 2 shown, the structural form of the middle-layer box body structure 7 of the present invention is similar to the structural form of the above-mentioned lower-layer box body structure 1, and has a plurality of middle-layer vertical plates 72 and a middle-layer mounting plate 71. The middle-layer vertical plates 72 are vertically installed on the middle-layer mounting plate 71 to form a semi-enclosed box body structure with a cavity. The middle-layer box body structure 7 of the present invention has a simple structure and is convenient to install.

[0055] It can be understood that the "semi-enclosed box body structure" refers to an unclosed box body structure with a cavity composed of the vertical plates and the mounting plates of each layer of box body structure.

[0056] It should be noted here that the middle layer box body structure 7 can be an integrally formed part. Since the structure of the middle layer box body structure 7 is simple, it can also be directly made into an integrally formed part by bending or casting during production and manufacturing, and the structure of the integrally formed part is more stable.

[0057] See Figure 2 , the upper layer box body structure 9 of the present invention includes an upper layer mounting plate 91 for carrying the battery pack 4 and capable of closing the upper end of the middle layer box body structure 7, and an upper cover 10 for sealing the battery pack 4 mounted on the upper layer mounting plate 91. The upper cover 10 is directly mounted on the upper layer mounting plate 91, and a connecting bracket 21 is provided on the outer surface of the upper cover 10. It can be understood that the main function of the upper cover 10 is to seal the battery pack 4 installed in the upper layer mounting plate 91. Therefore, the upper cover 10 can be a bent forming part or can be formed by welding plates together.

[0058] It should be noted that since the upper cover 10 of the upper layer box body structure 9 does not need to bear force, it can be formed by bending a thin plate when making a bent forming part. This can not only reduce the self-weight of the box body, reduce production costs, but also facilitate subsequent maintenance and repair.

[0059] See Figures 1 to 2 , as a specific implementation manner of the present invention, the connecting component 2 for installing and connecting the lower layer box body structure 1, the middle layer box body structure 7 and the upper layer box body structure 9 is composed of a plurality of connecting brackets 21 and a plurality of connecting plates 22, and further includes a connecting member 23 for fixedly connecting the connecting brackets 21 and the connecting plates 22. Among them, the connecting plates 22 and the connecting brackets 21 are arranged in one-to-one correspondence, the connecting plates 22 and the connecting brackets 21 are respectively installed on the side walls of the box body structures to be connected, and the connecting member 23 is used to connect and install the connecting brackets 21 and the connecting plates 22. It can be understood that the connecting member 23 can be a bolt, and corresponding threaded holes are provided on the connecting brackets 21 and the connecting plates 22, and bolts are used to fix them. It should be noted that the connecting brackets 21 can be integrally formed bent plates or brackets formed by welding, as long as they can cooperate with the connecting plates 22 to achieve the purpose of installing and connecting each box body structure. In addition, the specific number of the connecting brackets 21 and the connecting plates 22 can be set according to the specific use environment, the size of the battery installation box, etc.

[0060] See Figure 2, To better install and fix the middle - layer mounting plate 71 and the upper - layer mounting plate 91, lug structures 25 are provided on the sides of the middle - layer mounting plate 71 and the upper - layer mounting plate 91. The lug structures 25 can be inserted into the connecting plate 22 and the connecting bracket 21, and a connecting piece 23 is used to connect the three. This will make the installation of the middle - layer mounting plate 71 and the upper - layer mounting plate 91 more stable, increasing the structural strength of the box - body structure of the present invention. It should be noted that the existence of the lug structure 25 is for the connection between adjacent box - body structures. The lug structure 25 can directly replace the connecting piece 23 to connect with the connecting bracket 21 and play a fixing role.

[0061] In addition, as Figure 2 shown, the middle - layer mounting plate 71 and the upper - layer mounting plate 91 in the present invention are both provided with a hollow - out structure 26. The main function of the hollow - out structure 26 is to reduce the self - weight of the battery mounting box of the present invention.

[0062] See Figure 3 , To enhance the anti - torsional performance of the battery mounting box of the present invention, a structural strengthening component 3 is provided, including a plurality of strengthening beams 31, a plurality of strengthening - beam mounting plates 33, and strengthening - beam connecting pieces 32. The strengthening - beam mounting plates 33 are correspondingly installed on the outer surfaces of the middle - layer vertical plates 72 and the lower - layer vertical plates 13, and the strengthening beams 31 are installed on the corresponding strengthening - beam mounting plates 33 using the strengthening - beam connecting pieces 32. It should be noted that the strengthening beams 31 can use bent channel steels, or rectangular tubes or strengthening brackets, etc.

[0063] As an implementation manner of the present invention, for convenient hoisting, a lifting ring 24 for connecting the connecting bracket 21 and the connecting plate 22 is further provided between the upper - layer box - body structure 9 and the middle - layer box - body structure 7. It can be understood that here, the connecting piece 23 used to connect the connecting plate 22 and the connecting bracket 21 can be replaced with the lifting ring 24. In this way, the lifting ring 24 can be directly used for hoisting without installing other additional hoisting structures.

[0064] See Figure 3 , To make the structure stable during installation, as a preferred implementation manner of the present invention, nuts 5 are welded at all places where connection is required. The nuts 5 are fixed at places where bolt installation and fixation are required, such as on the connecting plate 22, the middle - layer mounting plate 71, the upper - layer mounting plate 91, and the bracket 101. In this way, during installation and connection, it can be avoided that the looseness between the nut 5 and the bolt affects the overall structural stability of the battery - pack mounting box.

[0065] In addition, for precise installation when installing each layer of box - body structure, see Figure 2, at the edges of the middle - layer mounting plate 71 and the upper - layer mounting plate 91 close to the mounting plate 15, a plurality of through - holes 51 welded with nuts are provided. The purpose of this design is that when assembling the present invention, long bolts can be used to penetrate the corresponding through - holes 51 in advance to pre - fix the assembly of the present invention. In addition, after the battery pack 4 is installed, the wires of the battery pack 4 can be sorted out, which is convenient for later maintenance.

[0066] The present invention also provides a battery box, which includes the battery installation box in the above - mentioned technical solution, and a battery pack 4 installed in the battery installation box. The battery installation box is installed on the slewing platform 20 through shock absorbers 17. When installing the shock absorbers 17 on the battery box, a reinforcing plate 12 needs to be provided on the battery box. On the one hand, the reinforcing plate 12 strengthens the structural strength of the bottom plate 11 to avoid deformation due to local stress at the installation position of the shock absorbers 17. On the other hand, the shock absorbers 17 can be interlocking shock absorbers, and there are requirements for the thickness of the mounting plate of the shock absorbers 17. In addition, the reinforcing plate 12 can be provided on the bottom plate 11 to increase the thickness of the bottom plate 11 to meet the installation requirements of the shock absorbers 17.

[0067] Furthermore, the present invention also discloses an electric excavator, which includes the battery box in the above - mentioned specific embodiments. The battery installation box in the battery box of this electric excavator is a layered structure, which has the advantages of simple structure and convenient disassembly and assembly. At the same time, the battery installation box has a good heat - preservation and heat - insulation function, which can extend the service life of the battery pack. The battery installation box of the present invention has been described through specific embodiments above. It can be understood that the structural main body and dimensions of the battery installation box of the present invention are not limited to the specific structural forms described in the above embodiments, and can also be other structural forms, as long as the battery installation box adopts a layered structure and is stacked and installed, so that the present invention has the advantages of simple structure, convenient disassembly and assembly, can extend the service life of the battery pack, and has good installation reliability.

[0068] To better understand the technical solution of the present invention, the following describes the preferred embodiments in combination with relatively comprehensive preferred technical features.

[0069] See Figures 1 to 4, the present invention provides a battery installation box, including a lower box body structure 1, a middle box body structure 7 and an upper box body structure 9. First, the lower vertical plate 13 is vertically installed on the bottom plate 11 to form a semi-enclosed box body structure with a cavity, and the battery pack 4 is installed and fixed in the cavity installed by the lower box body structure 1. A connection bracket 21 in the connection component 2 and a reinforcing beam mounting plate 33 in the structure strengthening component 3 are arranged on the working surface of the lower vertical plate 13 facing away from the battery pack 4. After the installation of the lower box body structure 1 is completed and the battery pack 4 is installed, a heat insulation layer and heat insulation sponge 8 are arranged inside and above it. Then, the installation of the middle box body structure 7 is carried out. The middle mounting plate 71 is placed and installed above the lower box body structure 1 that has been completed in installation. In the optimal implementation mode, one middle box body structure 7 is used. A lug structure 25 that can interact with the connection component 2 is arranged at the edge of the middle mounting plate 71. Then, the middle vertical plate 72 is vertically installed on the middle mounting plate 71. A connecting plate 22 that can jointly act and connect with the connection bracket 21 arranged on the lower vertical plate 13 of the lower box body structure 1 is arranged on the outer surface of the middle vertical plate 72. A reinforcing beam 31 that can cooperate with the reinforcing beam mounting plate 33 on the lower vertical plate 3 is also arranged. In addition, a connection bracket 21 for installing and connecting with the upper box body structure 9 is also arranged. After the assembly of the middle box body structure 7 is completed, the heat insulation sponge 8 is arranged. Then, the installation of the upper box body structure 9 is carried out. The upper mounting plate 91 is installed above the middle box body structure 7. A lug structure 25 for acting with the connection component 2 is also arranged at the edge of the upper mounting plate 91. Through holes welded with nuts 5 are provided on the bottom plate 11, the middle mounting plate 71 and the upper mounting plate 91. Long bolts are used to penetrate these through holes to initially fix the components that have been completed in installation. Nuts 5 are also welded on the connection brackets 21 in the connection component 2. The assembled connection brackets 21, connecting plates 22 and lug structures 25 are installed and fixed by using a connecting piece 23. The connecting piece 23 is preferably a bolt that cooperates with the nut 5. The reinforcing beam 31 is installed on the reinforcing beam mounting plates on the assembled lower box body structure 1 and middle box body structure 7 by using a reinforcing beam connecting piece 32. Then, the upper cover 10 of the bending and forming part with the connecting plate 22 installed is installed on the upper mounting plate 91, and the upper box body structure 9 and the middle box body structure 7 are connected and fixed by using the connecting piece 23, that is, a bolt. In addition, a hollow structure 26 is also arranged on the upper mounting plate 91 and the middle mounting plate 71. Brackets 101 welded with nuts 5 are arranged at the contact positions of the upper cover 10, the upper mounting plate 91 and the middle mounting plate 71 with the mounting plate 15. The wires of the battery pack 4 are sorted out. Then, the mounting plate 15 with heat insulation sponges 8 both inside and outside is installed on the side of the box body structure. Then, a lifting ring is used to replace the connecting piece 23 to connect the upper box body structure 9 and the middle box body structure 7.After the above steps, the battery installation box of the present invention is installed. Then, the shock absorber 17 is used to install the battery installation box of the present invention on the slewing platform 20. A reinforcing plate 12 is provided on the lower surface of the bottom plate 11. On the one hand, the structural strength of the bottom plate 11 is enhanced to avoid deformation due to local stress at the installation position of the shock absorber 17. On the other hand, the shock absorber 17 is a snap-in shock absorber, and the reinforcing plate 12 can ensure the required sheet thickness for installing the shock absorber 17. In order to reduce the wear caused by the friction between the nut 5 and the bolt, a gasket 6 is used during installation.

[0070] The battery installation box of the present invention has a layered structure and uses a stacked installation method. The connection component 2 is used to install and connect the structures of each box body. The structure of the present invention is simple and easy to disassemble and install. The structure strengthening component 3 is used to strengthen the structures of the lower box body structure 1 and the middle box body structure 7 to enhance the anti-torsion performance of the battery installation box. By providing a hollow structure 26 on the middle mounting plate 71 and the upper mounting plate 91, the self-weight of the battery installation box is reduced. At the same time, the upper cover 10 is made of a thin plate formed by bending, which can not only reduce the self-weight but also facilitate later maintenance and repair. Heat insulation sponges 8 are provided at multiple places inside the battery installation box to make the battery installation box have the function of heat insulation and heat preservation, protect the battery pack 4, and extend the service life of the battery pack 4. The upper box body structure 9 and the middle box body structure 7 are connected by a lifting ring, so that the present invention can be hoisted without additional hoisting structures.

[0071] After the battery installation box of the present invention is installed through the above technical solutions, it can be installed into an electric excavator. Through electrical connection, the structure of the battery installation box in the electric excavator of the present invention is simple, which provides convenience for subsequent maintenance and repair. Moreover, the self-weight of the battery installation box of this electric excavator is small, reducing the burden on the electric excavator.

[0072] In the description of the present invention, the descriptions referring to terms such as "one embodiment", "some embodiments", "a specific implementation manner", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0073] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0074] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present invention will not separately describe various possible combination manners.

[0075] In addition, any combination can also be made among various different embodiments of the present invention, as long as it does not violate the idea of the present invention, and it should equally be regarded as the content disclosed by the present invention.

Claims

1. A battery installation box, characterized in that, It includes a lower box body structure (1), at least one middle box body structure (7), and an upper box body structure (9). Cavities for installing battery packs (4) are provided in the lower box body structure (1), the middle box body structure (7), and the upper box body structure (9). The lower box body structure (1) and the middle box body structure (7), between adjacent middle box body structures (7), and between the middle box body structure (7) and the upper box body structure (9) are detachably connected by connection components (2) respectively. A mounting plate (15) is installed on the side of the mounting box structure formed by stacking the lower box body structure (1), the middle box body structure (7), and the upper box body structure (9) to form a closed structure. The mounting plate (15) is installed at the line assembly end of the battery pack (4), and the mounting plate (15) is an assembled mounting plate; wherein, The middle box body structure (7) includes a middle mounting plate (71) located between two adjacent middle box body structures (7) or between the middle box body structure (7) and the lower box body structure (1); The upper box body structure (9) includes an upper mounting plate (91) located between the middle box body structure (7) and the upper box body structure (9); The connection component (2) includes a plurality of connection brackets (21) respectively arranged on the outer surfaces of the lower box body structure (1), the middle box body structure (7), and the upper box body structure (9); Lugs (25) for installing and fixing with the connection bracket (21) are provided on the sides of the middle mounting plate (71) and the upper mounting plate (91).

2. The battery installation box according to claim 1, wherein, A structure strengthening component (3) is further provided between the middle box body structure (7) and the lower box body structure (1).

3. The battery installation box according to claim 1, characterized in that, Heat insulation sponges (8) capable of heat preservation and heat insulation are attached inside the mounting plate (15), the lower box body structure (1), the middle box body structure (7), and the upper box body structure (9).

4. The battery installation box according to any one of claims 1 to 3, characterized in that The lower box body structure (1) includes a bottom plate (11) and a plurality of lower vertical plates (13). The lower vertical plates (13) are vertically installed on the bottom plate (11) to form a semi-enclosed box body structure with a cavity. A bracket (101) for connecting and installing the mounting plate (15) is provided on the upper surface of the bottom plate (11).

5. The battery installation box according to claim 4, wherein The middle box body structure (7) further includes a plurality of middle vertical plates (72). The middle vertical plates (72) are vertically arranged on the middle mounting plate (71) to form a semi-enclosed box body structure with a cavity.

6. The battery installation box according to claim 5, characterized in that The middle box body structure (7) is an integrally formed part.

7. The battery installation box according to claim 5, characterized in that, The upper box body structure (9) further includes an upper cover (10). The upper cover (10) is installed on the upper mounting plate (91) to seal the battery pack (4) installed in the upper box body structure (9). An installation bracket (101) for connecting with the mounting plate (15) is further provided on the upper cover (10).

8. The battery installation box according to claim 7, characterized in that, The connection component (2) further includes a plurality of connection plates (22) and a plurality of connectors (23) capable of connecting the connection bracket (21) and the connection plates (22). The connection bracket (21) and the connection plates (22) are respectively disposed on the outer surfaces of the lower vertical plate (13), the middle vertical plate (72), and the upper housing (10).

9. The battery installation box according to claim 2, wherein The structure strengthening component (3) includes a plurality of strengthening beams (31), a plurality of strengthening beam mounting plates (33) for mounting the strengthening beams (31), and strengthening beam connectors (32) for connecting the strengthening beams (31) and the strengthening beam mounting plates (33).

10. The battery installation box according to claim 8, characterized in that, A plurality of lifting rings (24) for connecting the connection bracket (21) and the connection plates (22) are further disposed between the upper box body structure (9) and the middle box body structure (7).

11. A battery box, characterized in that, It includes the battery installation box according to any one of claims 1 to 10 and the battery pack (4) installed in the battery installation box. The battery installation box is installed on the slewing platform (20) through shock absorbers (17).

12. An electric excavator, characterized in that, It includes the battery box according to claim 11.

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