Battery box structure, battery structure and engineering machine

Abstract

The utility model discloses a battery box structure, battery structure and engineering machinery, including the apron, the apron below is equipped with a plurality of battery box body along up and down arrangement, the apron is rectangular board shape, the edge of apron is equipped with a plurality of bolt mounting hole, the battery box body includes the inner lining casing, the inner lining casing is the casing opening upwards rectangular casing shape, the inside of inner lining casing is used for placing one or a plurality of battery pack, the bottom plate is welded with the lower portion of the outer portion of inner lining casing, the periphery of outer portion of inner lining casing is welded with left side beam, right side beam, front end plate, rear end plate respectively, the top edge of a plurality of battery box body is equipped with the sealing washer. The utility model discloses through bottom plate, left side beam, right side beam, front end plate, rear end plate and the cooperation of inner lining casing, on the basis of guaranteeing strength and sealing, has lightened the weight, and the overall structure is compact, therefore has solved the problem that the existing battery box structure is heavy, and the energy density of battery structure is lower.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a battery box structure, a battery structure, and engineering machinery. Background Technology

[0002] Electrification is one of the important technological paths to achieve energy conservation and environmental protection in construction machinery. Electric construction machinery is characterized by high power consumption, long continuous operation time, harsh working conditions, and the need for large battery capacity.

[0003] Existing Technology 1: Currently, the most common approach to battery box structure is to assemble a standard box and then fabricate an additional standard box frame battery structure. This increases the difficulty of wiring harness and piping layout between boxes. Since the connector positions of the standard box are fixed, pipe crossings are inevitable during assembly, causing assembly difficulties. The combination of the standard box and frame battery structure results in excessive redundancy, lower overall battery energy density, low space utilization, numerous and complex connection lines and pipes, high manufacturing costs, and lower reliability.

[0004] Existing technology 2: The battery box structure is made of thick steel plates spliced ​​together. The process is simple, but the structure is bulky and the energy density of the battery structure is low.

[0005] Existing technology 3: The battery box structure uses aluminum alloy, which has a significant weight reduction effect, but the cost is high and the vibration resistance is limited, which cannot meet the needs of the harsh working conditions of electric engineering machinery. Utility Model Content

[0006] The purpose of this utility model is to provide a battery box structure, a battery structure, and engineering machinery to solve the technical problems of existing battery box structures being bulky and having low energy density.

[0007] To achieve the above objectives, the present invention provides a battery box structure, including a cover plate. Several battery boxes are arranged vertically below the cover plate. The cover plate is rectangular and has several bolt mounting holes along its edge. Each battery box includes an inner shell, which is also rectangular with its opening facing upwards. The interior of the inner shell is used to house one or more battery packs. A bottom plate is welded to the lower exterior of the inner shell. A left beam, a right beam, a front plate, and a rear plate are welded to the perimeter of the outer exterior of the inner shell. The bottom plate has several reinforcing ribs arranged front-to-back. Several bolt mounting holes are located on the upper and lower surfaces of the left beam, right beam, front plate, and rear plate, and these holes are coaxially arranged. The cover plate and the battery boxes are connected via bolts through these bolt mounting holes. A sealing ring is provided at the top edge of each battery box for sealing the lower battery box and the upper battery box or the cover plate.

[0008] Furthermore, the length of the reinforcing ribs of the base plate extends along the left and right sides, and the base plate is a stamped base plate.

[0009] Furthermore, the left beam, the right beam, the front end plate, and the rear end plate are made of roll-formed high-strength steel in a H-shape and welded together.

[0010] Furthermore, the inner liner shell is a sheet metal stamped shell.

[0011] Furthermore, a sealing step is provided around the top edge of several of the battery boxes to accommodate the sealing ring, and the bolt mounting holes on the left side beam, the right side beam, the front end plate, and the rear end plate are located outside the sealing step.

[0012] Furthermore, the inner top surfaces of the left and right beams are provided with several reinforcing ribs, and the front and rear ends of the left and right beams are provided with outer corner pieces.

[0013] Furthermore, the outer top surfaces of the left beam, the right beam, the front end plate, and the rear end plate are provided with a plurality of limiting pads, and the bottom of the limiting pads is provided with rivet nuts, which cooperate with the adjacent bolt mounting holes.

[0014] Furthermore, the left beam, the right beam, the front end plate, and the rear end plate are 1.2 to 1.5 mm thick, and the front end plate is equipped with one or more of the following: water inlet / outlet pipes, electrical connectors, and high-voltage positive and negative connectors.

[0015] This utility model also provides a battery structure, including a battery pack, and a battery box structure as described in any of the above technical solutions, wherein a plurality of the battery packs are placed inside a plurality of the inner liner shells, and a high voltage control box is provided at the upper end of the cover plate.

[0016] This utility model also provides an engineering machinery, including an engineering machinery body, and a battery box structure or a battery structure as described in any of the above technical solutions, wherein the battery box structure or the battery structure is disposed on the engineering machinery body.

[0017] In summary, the application of the technical solution of this utility model has the following beneficial effects: The structure design of this utility model is reasonable. (1) By setting a cover plate, several battery boxes are arranged vertically below the cover plate. The cover plate is rectangular and the edge of the cover plate is provided with several bolt mounting holes. The battery box includes an inner shell. The inner shell is a rectangular shell with the shell opening facing upward. The interior of the inner shell is used to place one or several battery packs. A bottom plate is welded to the bottom of the outer side of the inner shell. A left beam, a right beam, a front plate, and a rear plate are welded to the four sides of the outer side of the inner shell respectively. Thus, several battery boxes are stacked vertically. Each battery box is formed by welding the inner shell with the bottom plate, the left beam, the right beam, the front plate, and the rear plate, thereby improving the overall strength of the battery box structure. (2) By setting several bottom plate reinforcing ribs arranged along the front and back of the bottom plate, and several bolt mounting holes on the upper and lower surfaces of the left beam, right beam, front plate, and rear plate, the bolt mounting holes on the upper and lower surfaces of the same battery box are arranged coaxially. The cover plate is installed with several battery boxes through the bolt mounting holes and bolts. The top edge of several battery boxes is provided with sealing rings, which are used to seal the battery boxes of the next layer and the battery boxes or cover plates of the previous layer. Thus, the bottom strength of each battery box is guaranteed by the bottom plate reinforcing ribs, and the cover plate is installed with several battery boxes through the bolt mounting holes to form a whole. The setting of the sealing ring and the inner shell improves the sealing performance of each battery box. As can be seen from the above analysis, this utility model reduces the weight while ensuring strength and sealing by cooperating the bottom plate, left beam, right beam, front plate, rear plate and inner shell. The overall structure is compact, thus solving the problems of the bulky structure of the existing battery box and the low energy density of the battery structure. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the battery structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the battery box structure of this utility model; Figure 3 This is an exploded structural diagram of the battery box structure of this utility model; Explanation of reference numerals in the attached drawings: battery box (10), cover plate (20), high voltage control box (30); left side beam (11), reinforcing rib plate (12), outer corner piece (13), front end plate (14), right side beam (15), limiting pad (16), inner liner shell (17), rear end plate (18), bottom plate (19); bottom plate reinforcing rib (21), rivet nut (22), sealing ring (23), bolt mounting hole (24), bolt (25), shell opening (26). Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, but this does not constitute a limitation on the scope of protection of the present utility model.

[0020] In this utility model, for clearer description, the following explanation is provided: The observer faces the attached... Figure 1 When observing, the observer above is designated as "up" and the observer below is designated as "down". It should be noted that the terms "front end", "rear end", "left side", "right side", "middle", "above", "below", etc. in the text indicate the orientation or positional relationship based on the accompanying drawings. They are only for the purpose of clearly describing this utility model and do not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] See Figures 1 to 3This embodiment provides a battery box structure, including a cover plate 20. Several battery boxes 10 are arranged vertically below the cover plate 20. The cover plate 20 is rectangular, and its edges have several bolt mounting holes 24. Each battery box 10 includes an inner shell 17, which is a rectangular shell with its opening 26 facing upwards. The interior of the inner shell 17 is used to house one or more battery packs. A bottom plate 19 is welded to the lower exterior of the inner shell 17. A left beam 11, a right beam 15, and a front end plate 14 are welded to the perimeter of the outer side of the inner shell 17. The rear end plate 18 and the bottom plate 19 are provided with several bottom plate reinforcing ribs 21 arranged along the front and rear. The left beam 11, the right beam 15, the front end plate 14, and the rear end plate 18 are provided with several bolt mounting holes 24 on the upper and lower surfaces. The bolt mounting holes 24 on the upper and lower surfaces of the same battery box 10 are arranged coaxially. The cover plate 20 is installed with several battery boxes 10 through bolt mounting holes 24 and bolts 25. The top edge of several battery boxes 10 is provided with sealing rings 23. The sealing rings 23 are used to seal the battery box 10 of the next layer and the battery box 10 or cover plate 20 of the previous layer. Function: (1) By setting a cover plate, several battery boxes are arranged vertically below the cover plate. The cover plate is rectangular and has several bolt mounting holes on its edge. The battery box includes an inner shell, which is a rectangular shell with the shell opening facing upward. The interior of the inner shell is used to place one or more battery packs. A bottom plate is welded to the bottom of the outer side of the inner shell. A left beam, a right beam, a front plate, and a rear plate are welded to the four sides of the outer side of the inner shell. Thus, several battery boxes are stacked vertically. Each battery box is formed by welding the inner shell with the bottom plate, the left beam, the right beam, the front plate, and the rear plate, thereby improving the overall strength of the battery box structure. (2) By setting several bottom plate reinforcing ribs arranged along the front and back of the bottom plate, and several bolt mounting holes on the upper and lower surfaces of the left beam, right beam, front plate, and rear plate, the bolt mounting holes on the upper and lower surfaces of the same battery box are arranged coaxially. The cover plate is installed with several battery boxes through the bolt mounting holes and bolts. The top edge of several battery boxes is provided with sealing rings, which are used to seal the battery boxes of the next layer and the battery boxes or cover plates of the previous layer. Thus, the bottom strength of each battery box is guaranteed by the bottom plate reinforcing ribs, and the cover plate is installed with several battery boxes through the bolt mounting holes to form a whole. The setting of the sealing ring and the inner shell improves the sealing performance of each battery box. As can be seen from the above analysis, this utility model reduces the weight while ensuring strength and sealing by cooperating the bottom plate, left beam, right beam, front plate, rear plate and inner shell. The overall structure is compact, thus solving the problems of the bulky structure of the existing battery box and the low energy density of the battery structure.

[0022] Specifically, the length of the bottom plate reinforcing rib 21 extends along the left and right sides, and the bottom plate 19 is a stamped bottom plate. Function: This arrangement improves the bottom strength of each battery box layer. Preferably, the bottom plate is made of Q235 material (Q235 is carbon structural steel) and is stamped.

[0023] Specifically, the left beam 11, right beam 15, front end plate 14, and rear end plate 18 are made of H-shaped roll-formed high-strength steel welded together. Function: Roll-formed high-strength steel profiles, also known as high-strength steel roll-formed profiles (i.e., high-strength steel coils or strips are formed into profiles of different cross-sections through roll forming, cut to length, and welded together; high-strength steel itself is existing technology and will not be elaborated here), balance weight reduction and cost, have high continuous production efficiency and good surface quality, can manufacture complex cross-sections, and can optimize the battery box based on the process characteristics of roll-formed high-strength steel, achieving lightweight multi-layer battery box integration.

[0024] Specifically, the inner liner shell 17 is a sheet metal stamped shell, or an inner liner shell made of glass fiber and epoxy resin composite material. Function: Each battery box is connected to an inner liner shell, which can be made of sheet metal DC01 material stamped shell, or made of glass fiber + epoxy resin composite material, to increase the thermal insulation performance of the box under low temperature conditions.

[0025] Specifically, the top edge of several battery boxes 10 is provided with a sealing step to accommodate the sealing ring 23. The bolt mounting holes 24 on the left beam 11, right beam 15, front plate 14, and rear plate 18 are located outside the sealing step. Function: The sealing ring 23 ensures the airtightness of the single-layer box; the sealing step facilitates the installation and fixing of the sealing ring 23; and the bolt mounting holes 24, located outside the sealing step and the sealing ring 23, facilitate bolt installation and connection.

[0026] Specifically, the inner top surfaces of the left beam 11 and the right beam 15 are provided with several reinforcing ribs 12, and the front and rear ends of the left beam 11 and the right beam 15 are provided with outer corner pieces 13. Function: The reinforcing ribs 12 can improve the strength of the left beam 11 and the right beam 15, while the outer corner pieces 13 can serve to connect the two side components (such as the transition connection between the left beam 11 and the front end plate 14).

[0027] Specifically, the outer top surfaces of the left beam 11, right beam 15, front end plate 14, and rear end plate 18 are provided with several limiting pads 16. The bottom of each limiting pad 16 is provided with a rivet nut 22, which mates with the adjacent bolt mounting hole 24. Function: The rivet nut 22 can be installed and mated with the bolt mounting hole 24 and the bolt 25.

[0028] Specifically, the left beam 11, right beam 15, front end plate 14, and rear end plate 18 are 1.2–1.5 mm thick. The front end plate 14 is equipped with one or more of the following: water inlet / outlet pipes, electrical connectors, and high-voltage positive / negative connectors. Function: The front end plate 14 houses components such as water inlet / outlet pipes, electrical connectors, and high-voltage positive / negative connectors. These components can enter the interior of the inner liner 17 through the front opening and cooperate with the battery pack.

[0029] This utility model also provides a battery structure, including a battery pack and a battery housing structure according to any of the above-mentioned technical solutions. Several battery packs are placed inside several inner liner shells 17, and a high-voltage control box 30 is provided at the upper end of the cover plate 20. Function: The battery packs are placed inside the battery housing structure to form a complete power battery pack.

[0030] This utility model also provides an engineering machinery, including the engineering machinery body, and a battery box structure or battery structure according to any of the above-mentioned technical solutions, wherein the battery box structure or battery structure is disposed on the engineering machinery body. Function: The battery box structure and battery structure of this utility model can be applied to all medium and large-sized electric engineering machinery: heavy trucks, wide-body vehicles, excavators, and loaders. It solves the problems of bulky battery box structures and low energy density of existing battery structures, reducing weight by 30% or more and increasing weight energy density by 30%. More specifically, the engineering machinery body can also be equipped with components such as controllers and motors.

[0031] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A battery housing structure, including a cover plate (20), characterized in that: Below the cover plate (20) are several battery boxes (10) arranged vertically. The cover plate (20) is rectangular. The edge of the cover plate (20) is provided with several bolt mounting holes (24). The battery box (10) includes an inner shell (17). The inner shell (17) is a rectangular shell with the shell opening (26) facing upward. The interior of the inner shell (17) is used to place one or more battery packs. A bottom plate (19) is welded to the lower part of the outer side of the inner shell (17). A left beam (11), a right beam (15), a front plate (14), and a rear plate (18) are welded to the four sides of the outer side of the inner shell (17). The bottom plate (19) is provided with a bolt mounting hole (24) along the front and rear sides. A number of bottom plate reinforcing ribs (21) are arranged. The left beam (11), the right beam (15), the front end plate (14), and the rear end plate (18) are provided with a number of bolt mounting holes (24) on the upper and lower surfaces. The bolt mounting holes (24) on the upper and lower surfaces of the same battery box (10) are arranged coaxially. The cover plate (20) and the battery boxes (10) are installed with bolts (25) through the bolt mounting holes (24). The top edge of the battery boxes (10) is provided with sealing rings (23). The sealing rings (23) are used to seal the battery box (10) of the next layer and the battery box (10) or the cover plate (20) of the previous layer.

2. The battery housing structure according to claim 1, characterized in that: The length of the reinforcing rib (21) of the base plate extends along the left and right sides, and the base plate (19) is a stamped base plate.

3. The battery housing structure according to claim 1, characterized in that: The left beam (11), the right beam (15), the front end plate (14), and the rear end plate (18) are made of roll-formed high-strength steel in a H-shape and welded together.

4. The battery housing structure according to claim 1, characterized in that: The inner lining shell (17) is a sheet metal stamped inner lining shell.

5. The battery housing structure according to claim 1, characterized in that: The top edge of several of the battery boxes (10) is provided with a sealing step for accommodating the sealing ring (23), and the bolt mounting holes (24) on the left beam (11), the right beam (15), the front plate (14), and the rear plate (18) are located outside the sealing step.

6. A battery housing structure according to any one of claims 1 to 5, characterized in that: The inner top surfaces of the left beam (11) and the right beam (15) are provided with a number of reinforcing ribs (12), and the front and rear ends of the left beam (11) and the right beam (15) are provided with outer corner pieces (13).

7. The battery housing structure according to claim 6, characterized in that: The outer top surfaces of the left beam (11), the right beam (15), the front end plate (14), and the rear end plate (18) are provided with a number of limiting pads (16), and the bottom of the limiting pads (16) is provided with rivet nuts (22), which cooperate with the adjacent bolt mounting holes (24).

8. A battery housing structure according to any one of claims 1 to 5, characterized in that: The left beam (11), the right beam (15), the front end plate (14), and the rear end plate (18) are 1.2 to 1.5 mm thick. The front end plate (14) is equipped with one or more of the following: water inlet / outlet pipes, electrical connectors, and high-voltage positive and negative connectors.

9. A battery structure, comprising a battery pack, characterized in that: It also includes the battery housing structure according to any one of claims 1 to 8, wherein a plurality of the battery packs are placed inside a plurality of the inner liner housings (17), and a high voltage control box (30) is provided at the upper end of the cover plate (20).

10. An engineering machinery, comprising an engineering machinery body, characterized in that: It also includes the battery housing structure according to any one of claims 1 to 8 or the battery structure according to claim 9, wherein the battery housing structure or the battery structure is disposed on the engineering machinery body.

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