Lithium battery box for electric engineering machinery

Abstract

The utility model belongs to the technical field of electric engineering machinery, and relates to a lithium battery box of electric engineering machinery. A box body bottom plate (3) is arranged at the bottom of the box body side plate (2), a battery mounting bracket (15) is arranged in the box body side plate (2), a supporting main body (7) is arranged on the inner wall of the box body side plate (2), the supporting main body (7) is of a 7-shaped structure or a triangular structure, the upper part of the supporting main body (7) is connected with the lower surface of the battery mounting bracket (15), and the outer side of the supporting main body (7) is connected with a supporting main body reinforcing piece (7); the upper part of the supporting main body reinforcer (6) is connected with the lower part of the battery mounting bracket (15), and the lower part of the supporting main body reinforcer (6) is connected with the box body bottom plate (3). The lithium battery box body for the electric engineering machinery is simple in structure, the structural strength of the battery frame can be conveniently and reliably improved, meanwhile, the weight of the battery structure is reduced, and a battery is effectively protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric engineering machinery, and more specifically, relates to a lithium battery box for electric engineering machinery. Background Art

[0002] In recent years, the development and application of pure electric construction machinery has become a key path for energy conservation, emission reduction, and transformation and upgrading in the construction machinery industry. The power batteries used in electric construction machinery, such as heavy-duty trucks and mining trucks, are designed for rapid battery replacement and recharging. Traditional construction machinery batteries consist of a standard battery box, a frame, and an outer casing. This makes the entire system difficult to install and relatively heavy. Consequently, they fail to meet strength and weight reduction requirements.

[0003] The prior art includes a technology entitled "A lithium battery case assembly for a new energy electric vehicle" and publication number "CN112820999A." This technology discloses a lithium battery case assembly for a new energy electric vehicle, relating to the field of new energy vehicle technology. The invention comprises an outer box, a storage rack housed within the outer box, and two side panels disposed between the two ends of the outer box bottom. Two movable blocks are slidably engaged through slide grooves at the ends of the side panels. Two bidirectional threaded rods are rotatably connected between the two ends of the outer box bottom, threadedly engaging the movable blocks. A connecting rod is hinged at the top of each movable block. The other ends of the two connecting rods are hinged to the center of the bottom of the storage rack. Heat sinks are provided on both sides of one end of the outer box. The invention utilizes bidirectional threaded rods to drive the two movable blocks to move relative to each other, allowing the connecting rods to lift the storage rack as a whole, facilitating the installation and removal of lithium batteries. The double-row placement and organized wiring make the entire lithium battery case compact and highly integrated. A heat dissipation channel is formed between the bottom of the storage rack and the interior of the outer box to dissipate heat from the lithium batteries, thereby increasing their service life. However, this technology does not address the technical problems and technical solutions of the present application. Utility Model Content

[0004] The technical problem to be solved by the present invention is: in view of the deficiencies in the existing technology, to provide a lithium battery box for electric engineering machinery with a simple structure, which can conveniently and reliably improve the structural strength of the battery frame, while reducing the weight of the battery structure and effectively protecting the battery.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0006] The utility model is a lithium battery box for electric engineering machinery, wherein a box bottom plate is arranged at the bottom of the box side plate, a battery mounting bracket is arranged inside the box side plate, a supporting body is arranged on the inner wall of the box side plate, the supporting body is in a 7-shaped structure or a triangular structure, the upper part of the supporting body is connected to the lower surface of the battery mounting bracket, the outer side of the supporting body is connected to the supporting body reinforcement, the upper part of the supporting body reinforcement is connected to the lower part of the battery mounting bracket, and the lower part of the supporting body reinforcement is connected to the box bottom plate.

[0007] The box side panels include a box left side panel, a box front side panel, a box right side panel, and a box rear side panel. The box left side panel, the box front side panel, the box right side panel, and the box rear side panel are square structures.

[0008] The lower parts of the left side panel, front side panel, right side panel and rear side panel of the box body are respectively connected to the bottom panel of the box body. The left side panel, front side panel, right side panel and rear side panel of the box body are welded connection structures or integrated structures.

[0009] The battery mounting bracket includes a first battery mounting bracket and a second battery mounting bracket, the support body includes a left support body and a right support body, and the support body reinforcement includes a left support body reinforcement and a right support body reinforcement.

[0010] The lower left portion of the first battery mounting bracket is connected to multiple left support bodies, the lower left portion of the second battery mounting bracket is connected to multiple left support bodies, the lower right portion of the first battery mounting bracket is connected to multiple right support bodies, and the lower right portion of the second battery mounting bracket is connected to multiple right support bodies. The outer side of each right support body on the lower right side of the first battery mounting bracket and the outer side of a corresponding right support body on the lower right side of the second battery mounting bracket are connected to a right support body reinforcement. The upper portion of each right support body reinforcement is respectively connected to the lower right side of the first battery mounting bracket, and the lower portion of each right support body reinforcement is respectively connected to the upper right surface of the box bottom plate.

[0011] The outer side of each left support body at the lower left side of the first battery mounting bracket and the outer side of a corresponding left support body at the lower left side of the second battery mounting bracket are connected to the left support body reinforcement, the upper part of each left support body reinforcement is respectively connected to the lower left side of the first battery mounting bracket, and the lower part of each left support body reinforcement is respectively connected to the upper left surface of the box bottom plate.

[0012] The box bottom plate is provided with box bottom plate reinforcement ribs, the box left side plate and the box right side plate are respectively provided with box fixing brackets at the lower outer sides, and the box upper cover is provided at the upper part of the box side plate.

[0013] A plurality of battery modules are arranged on the first battery mounting bracket, and a plurality of battery modules are arranged on the second battery mounting bracket.

[0014] A folding portion is provided on the left side of the first battery mounting bracket, which is connected to the left side plate of the box body by bolts or welding. A folding portion is provided on the right side of the first battery mounting bracket, which is connected to the right side plate of the box body by bolts or welding. A folding portion is provided on the left side of the second battery mounting bracket, which is connected to the left side plate of the box body by bolts or welding. A folding portion is provided on the right side of the second battery mounting bracket, which is connected to the right side plate of the box body by bolts or welding.

[0015] Each left-side support body reinforcement is respectively connected to the folded edge portion of the second battery mounting bracket, and each right-side support body reinforcement is respectively connected to the folded edge portion of the second battery mounting bracket.

[0016] The technical solution of this utility model is adopted, and the working principle and beneficial effects are as follows:

[0017] The lithium battery box for electric engineering machinery described in the present invention is provided with box side panels during structural setting. The box side panels are of square structure, while the upper and lower parts of the box side panels are hollowed out. The bottom of the box side panels is used to connect to the box bottom plate, and the upper part of the box side panels is used to connect to the box cover. A battery mounting bracket is provided inside the box side panels, and the battery mounting bracket is used to place the battery module. A supporting body is provided on the inner wall of the box side panels, and the supporting body is in a 7-shaped structure or a triangular structure. The upper part of the supporting body is connected to the lower surface of the battery mounting bracket, and the outer side of the supporting body is connected to the supporting body reinforcement. The upper part of the supporting body reinforcement is connected to the lower part of the battery mounting bracket, and the lower part of the supporting body reinforcement is connected to the box bottom plate. The supporting body and the supporting body reinforcement are used to strengthen the internal structural strength, which not only strengthens the strength of the battery mounting bracket, but also strengthens the strength of the box side panels, and does not require the use of overly thick and heavy plates. In the above structure, when the battery case is formed, the battery module is fixed inside the battery case in a layered manner, that is, multiple battery mounting brackets can be provided, arranged adjacent to each other up and down, and a battery module is arranged on each battery mounting bracket. The provision of the support body and the support body reinforcement can achieve local structural reinforcement, without the need to achieve structural reinforcement by strengthening the thickness of the side panels, bottom panel, and upper cover of the case, thereby achieving the purpose of weight reduction by reducing the thickness of the steel plates of the side panels, bottom panel, and upper cover of the case. By increasing the support of the "7"-shaped support body and the support body reinforcement, the load-bearing effect on the battery module inside the battery case can be improved. The support body is connected to the corresponding components by laser welding. This not only increases the wall thickness of the stress-bearing point of the battery case, but also effectively supports the battery case in the Y and Z directions, making the inner wall of the battery case more supportive. In addition, the connection between the battery module mounting bracket and the side panel of the box, through the connection of different parts of multiple components, the battery box 1 also has a large constraint force in the X direction, so that the inside of the box is constrained in the X, Y and Z directions, increasing the structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1 This is a schematic structural diagram of the lithium battery box for electric engineering machinery described in the present utility model;

[0020] Figure 2 This is a schematic structural diagram of the lithium battery box for electric engineering machinery described in the present utility model;

[0021] The marks in the accompanying drawings are: 1. Battery box; 2. Box side panel; 3. Box bottom plate; 4. Bottom plate reinforcement rib; 5. Box fixing bracket; 6. Support body reinforcement; 7. Support body; 9. Left side support body; 10. Right side support body; 11. Left side support body reinforcement; 12. Right side support body reinforcement; 13. First battery mounting bracket; 14. Second battery mounting bracket; 15. Battery mounting bracket; 16. Folding part; 17. Box left side panel; 18. Box front side panel; 19. Box right side panel; 20. Box rear side panel. DETAILED DESCRIPTION

[0022] The following is a detailed description of the embodiments of the present invention, such as the shapes, structures, positions and connections of the various components involved, the functions and working principles of the various components, etc., by referring to the accompanying drawings.

[0023] As attached Figure 1 , Attachment Figure 2As shown, the present invention is a lithium battery case for electric engineering machinery. A case bottom plate 3 is disposed at the bottom of the case side plate 2. A battery mounting bracket 15 is disposed within the case side plate 2. A support body 7 is disposed on the inner wall of the case side plate 2. The support body 7 is in a 7-shaped or triangular structure. The upper portion of the support body 7 is connected to the lower surface of the battery mounting bracket 15. The outer portion of the support body 7 is connected to a support body reinforcement 6. The upper portion of the support body reinforcement 6 is connected to the lower portion of the battery mounting bracket 15. The lower portion of the support body reinforcement 6 is connected to the case bottom plate 3. The above structure addresses the shortcomings of the existing technology and proposes an improved technical solution. When setting up the structure, a box side panel 2 is set. The box side panel 2 is a square structure, and the upper and lower parts of the box side panel 2 are hollowed out. The bottom of the box side panel 2 is used to connect to the box bottom panel 3, and the upper part of the box side panel 2 is used to connect to the box cover. A battery mounting bracket 15 is set inside the box side panel 2. The battery mounting bracket 15 is used to place the battery module. A support body 7 is set on the inner wall of the box side panel 2. The support body 7 is a 7-shaped structure or a triangular structure. The upper part of the support body 7 is connected to the lower surface of the battery mounting bracket 15, and the outer side of the support body 7 is connected to the support body reinforcement 7. The upper part of the support body reinforcement 6 is connected to the lower part of the battery mounting bracket 15, and the lower part of the support body reinforcement 6 is connected to the box bottom panel 3. The support body 7 and the support body reinforcement 6 are used to strengthen the internal structural strength, which not only strengthens the strength of the battery mounting bracket 15, but also strengthens the strength of the box side panel, and does not require the use of overly thick and heavy plates. In the above structure, when the battery case 1 is formed, the battery modules are fixed inside the battery case 1 in a layered manner. That is, multiple battery mounting brackets 15 can be provided, arranged adjacent to each other, with a corresponding battery module arranged on each battery mounting bracket 15. The provision of the support body 7 and the support body reinforcement 6 can achieve local structural reinforcement, eliminating the need to achieve structural reinforcement by strengthening the thickness of the case side panels 2, the case bottom panel 3, and the case top cover. The purpose of weight reduction is achieved by reducing the thickness of the steel plates of the case side panels 2, the case bottom panel 3, and the case top cover. By increasing the support of the "7"-shaped support body 7 and the support body reinforcement 6, the load-bearing effect on the battery modules inside the battery case 1 can be improved. The support body 7 is welded to the corresponding components by laser welding. This not only increases the wall thickness of the battery case at the stress point, but also effectively supports the battery case in the Y and Z directions, making the inner wall of the battery case more supportive. In addition, the connection between the battery module mounting bracket 15 and the side panel 2 of the case, through the connection of multiple components at different locations, provides a strong constraint force in the X direction for the battery case 1, thereby achieving internal constraints in the X, Y, and Z directions, thereby increasing structural strength. The lithium battery case for electric engineering machinery described in this utility model has a simple structure and can conveniently and reliably improve the structural strength of the battery frame while reducing the weight of the battery structure, effectively protecting the battery.

[0024] The side panels 2 of the box body include a left side panel 17, a front side panel 18, a right side panel 19, and a rear side panel 20. The left side panel 17, the front side panel 18, the right side panel 19, and the rear side panel 20 are square-shaped. The lower portions of the left side panel 17, the front side panel 18, the right side panel 19, and the rear side panel 20 are connected to the bottom panel 3 of the box body. The left side panel 17, the front side panel 18, the right side panel 19, and the rear side panel 20 are welded or integrated. In the above structure, the side panels 2 of the box body can be an integrated structure, or the left side panel 17, the front side panel 18, the right side panel 19, and the rear side panel 20 can be made separately and then welded to form. The side panels 2 of the box are of a square structure, with the battery modules placed inside, while the lower box bottom panel 3 supports the battery modules, and the upper box cover seals the battery modules from above, thus achieving a structurally reliable and high-strength battery box.

[0025] The battery mounting bracket 15 includes a first battery mounting bracket 13 and a second battery mounting bracket 14. The support body 7 includes a left support body 9 and a right support body 10. The support body reinforcement 6 includes a left support body reinforcement 11 and a right support body reinforcement 12. In this structure, the first battery mounting bracket 13 supports multiple battery modules, and the second battery mounting bracket 14 supports multiple battery modules, achieving layered placement of the battery modules.

[0026] The lower left side of the first battery mounting bracket 13 is connected to multiple left support bodies 9, the lower left side of the second battery mounting bracket 14 is connected to multiple left support bodies 9, the lower right side of the first battery mounting bracket 13 is connected to multiple right support bodies 10, and the lower right side of the second battery mounting bracket 14 is connected to multiple right support bodies 10. The outer side of each right support body 10 on the lower right side of the first battery mounting bracket 13 and the outer side of a corresponding right support body 10 on the lower right side of the second battery mounting bracket 14 are connected to a right support body reinforcement 12. The upper portion of each right support body reinforcement 12 is connected to the lower right side of the first battery mounting bracket 13, and the lower portion of each right support body reinforcement 12 is connected to the upper right surface of the box bottom plate 3. In the above structure, for the arrangement of the first battery mounting bracket 13 and the second battery mounting bracket 14, each layer of battery mounting tray is connected to the support body on the side, and then the support body reinforcement is provided to achieve reliable connection of the battery mounting trays, improve load-bearing strength, and meet battery layout requirements.

[0027] The outer side of each left support body 9 at the left lower portion of the first battery mounting bracket 13 and the outer side of a corresponding left support body 9 at the left lower portion of the second battery mounting bracket 14 are connected to the left support body reinforcement 11. The upper portion of each left support body reinforcement 11 is connected to the left lower portion of the first battery mounting bracket 13, and the lower portion of each left support body reinforcement 11 is connected to the left upper surface of the box bottom plate 3. In this structure, the support body and support body reinforcement on each side connect and support the corresponding components from the side, ensuring the structural strength of the box.

[0028] The box bottom plate 3 is provided with box bottom reinforcement ribs 4. Box fixing brackets 5 are provided on the lower outer sides of the left and right box plates 17 and 19, respectively. The box top cover is provided above the box side plates 2. In this structure, the box bottom reinforcement ribs 4 serve to enhance the strength of the box bottom plate, while the box fixing brackets 5 serve to connect the box to the box layout structure. Bolts connect the box fixing brackets to the box layout structure through the screw holes of the box fixing brackets 5.

[0029] A plurality of battery modules are arranged on the first battery mounting bracket 13, and a plurality of battery modules are arranged on the second battery mounting bracket 14. The above structure realizes the layered arrangement of the battery modules.

[0030] The first battery mounting bracket 13 is provided with a folded edge 16 on the left side, which is connected to the left side panel 17 of the box body by bolts or welding. The first battery mounting bracket 13 is provided with a folded edge 16 on the right side, which is connected to the right side panel 19 of the box body by bolts or welding. The second battery mounting bracket 14 is provided with a folded edge 16 on the left side, which is connected to the left side panel 17 of the box body by bolts or welding. The second battery mounting bracket 14 is provided with a folded edge 16 on the right side, which is connected to the right side panel 19 of the box body by bolts or welding. In the above structure, each folded edge is reliably connected to the corresponding box side panel.

[0031] Each left-side support body reinforcement 11 is connected to the hem 16 of the second battery mounting bracket 14, and each right-side support body reinforcement 12 is connected to the hem 16 of the second battery mounting bracket 14. With the above structure, each support body reinforcement is connected not only to the corresponding support body but also to the hem of the battery mounting tray, achieving a reliable connection and improving strength.

[0032] The electric engineering machinery lithium battery box described in the present invention has a box side panel 2 with a square structure, while the upper and lower parts of the box side panel 2 are hollowed out, the bottom of the box side panel 2 is used to connect to the box bottom panel 3, the upper part of the box side panel 2 is used to connect to the box cover, a battery mounting bracket 15 is arranged inside the box side panel 2, the battery mounting bracket 15 is used to place the battery module, and a support body 7 is arranged on the inner wall of the box side panel 2, the support body 7 is a 7-shaped structure or a triangular structure, the upper part of the support body 7 is connected to the lower surface of the battery mounting bracket 15, the outer side of the support body 7 is connected to the support body reinforcement 7, the upper part of the support body reinforcement 6 is connected to the lower part of the battery mounting bracket 15, and the lower part of the support body reinforcement 6 is connected to the box bottom panel 3, the support body 7 and the support body reinforcement 6 are used to strengthen the internal structural strength, which not only strengthens the strength of the battery mounting bracket 15, but also strengthens the strength of the box side panel, and does not require the use of overly thick and heavy plates. In the above structure, when the battery case 1 is formed, the battery module is fixed inside the battery case 1 in a layered manner, that is, multiple battery mounting brackets 15 can be provided, arranged adjacent to each other in an upper and lower manner, and a battery module is correspondingly arranged on each battery mounting bracket 15. The provision of the support body 7 and the support body reinforcement 6 can achieve local structural reinforcement, eliminating the need to achieve structural reinforcement by strengthening the thickness of the case side panels 2, the case bottom panel 3, and the case top cover. The purpose of weight reduction is achieved by reducing the thickness of the steel plates of the case side panels 2, the case bottom panel 3, and the case top cover. By increasing the support of the "7"-shaped support body 7 and the support body reinforcement 6, the load-bearing effect on the battery module inside the battery case 1 is improved. The support body 7 is welded to the corresponding components by laser welding. This not only increases the wall thickness of the battery case at the stress point, but also effectively supports the battery case in the Y and Z directions, making the inner wall of the battery case more supportive. In addition, the connection between the battery module mounting bracket 15 and the box side panel 2, through the connection of different parts of multiple components, the battery box 1 also has a large constraint force in the X direction, so that the inside of the box is constrained in the X, Y and Z directions, increasing the structural strength.

[0033] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A lithium battery box for electric engineering machinery, characterized by: A box bottom plate (3) is provided at the bottom of the box side plate (2), a battery mounting bracket (15) is provided inside the box side plate (2), a support body (7) is provided on the inner wall of the box side plate (2), the support body (7) is in a 7-shaped structure or a triangular structure, the upper part of the support body (7) is connected to the lower surface of the battery mounting bracket (15), the outer side of the support body (7) is connected to the support body reinforcement (6), the upper part of the support body reinforcement (6) is connected to the lower part of the battery mounting bracket (15), and the lower part of the support body reinforcement (6) is connected to the box bottom plate (3).

2. The lithium battery box for electric engineering machinery according to claim 1, characterized in that: The box side panels (2) include a box left side panel (17), a box front side panel (18), a box right side panel (19), and a box rear side panel (20), wherein the box left side panel (17), the box front side panel (18), the box right side panel (19), and the box rear side panel (20) are in a square structure.

3. The lithium battery box for electric engineering machinery according to claim 2, characterized in that: The lower parts of the left side panel (17), the front side panel (18), the right side panel (19), and the rear side panel (20) of the box body are respectively connected to the bottom panel (3) of the box body. The left side panel (17), the front side panel (18), the right side panel (19), and the rear side panel (20) of the box body are welded connection structures or integrated structures.

4. The lithium battery box for electric engineering machinery according to claim 1 or 2, characterized in that: The battery mounting bracket (15) includes a first battery mounting bracket (13) and a second battery mounting bracket (14); the support body (7) includes a left support body (9) and a right support body (10); and the support body reinforcement (6) includes a left support body reinforcement (11) and a right support body reinforcement (12).

5. The lithium battery box for electric engineering machinery according to claim 4, characterized in that: The lower left side of the first battery mounting bracket (13) is connected to a plurality of left side support bodies (9), the lower left side of the second battery mounting bracket (14) is connected to a plurality of left side support bodies (9), the lower right side of the first battery mounting bracket (13) is connected to a plurality of right side support bodies (10), and the lower right side of the second battery mounting bracket (14) is connected to a plurality of right side support bodies (10).

6. The lithium battery box for electric engineering machinery according to claim 5, characterized in that: The outer side of each left support body (9) on the left lower part of the first battery mounting bracket (13) and the outer side of a left support body (9) corresponding to the left lower part of the second battery mounting bracket (14) are connected to the left support body reinforcement (11), the upper part of each left support body reinforcement (11) is respectively connected to the left lower part of the first battery mounting bracket (13), and the lower part of each left support body reinforcement (11) is respectively connected to the left upper surface of the box bottom plate (3); the outer side of each right support body (10) on the right lower part of the first battery mounting bracket (13) and the outer side of a right support body (10) corresponding to the right lower part of the second battery mounting bracket (14) are connected to the right support body reinforcement (12), the upper part of each right support body reinforcement (12) is respectively connected to the right lower part of the first battery mounting bracket (13), and the lower part of each right support body reinforcement (12) is respectively connected to the right upper surface of the box bottom plate (3).

7. The lithium battery box for electric engineering machinery according to claim 1 or 2, characterized in that: The box bottom plate (3) is provided with a box bottom plate reinforcement rib (4), the box left side plate (17) and the box right side plate (19) are provided with a box fixing bracket (5) at the lower outer sides thereof, and the box top cover is provided on the upper part of the box side plate (2).

8. The lithium battery box for electric engineering machinery according to claim 4, characterized in that: A plurality of battery modules are arranged on the first battery mounting bracket (13), and a plurality of battery modules are arranged on the second battery mounting bracket (14).

9. The lithium battery box for electric engineering machinery according to claim 4, characterized in that: The first battery mounting bracket (13) is provided with a folding portion (16) on the left side, and the folding portion (16) is connected to the left side plate (17) of the box body by bolts or welding. The first battery mounting bracket (13) is provided with a folding portion (16) on the right side, and the folding portion (16) is connected to the right side plate (19) of the box body by bolts or welding. The second battery mounting bracket (14) is provided with a folding portion (16) on the left side, and the folding portion (16) is connected to the left side plate (17) of the box body by bolts or welding. The second battery mounting bracket (14) is provided with a folding portion (16) on the right side, and the folding portion (16) is connected to the right side plate (19) of the box body by bolts or welding.

10. The lithium battery box for electric engineering machinery according to claim 9, characterized in that: Each left-side supporting main body reinforcement member (11) is respectively connected to the folded edge portion (16) of the second battery mounting bracket (14), and each right-side supporting main body reinforcement member (12) is respectively connected to the folded edge portion (16) of the second battery mounting bracket (14).

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