construction machinery

Abstract

This disclosure provides an engineering machinery. The engineering machinery includes a frame, a body, a battery system, and a connecting assembly. The battery system includes a base and a battery assembly disposed on the base. The battery assembly includes multiple battery packs stacked in the height direction, each battery pack including a battery box and at least one battery module disposed within the battery box. The connecting assembly includes a first connecting structure disposed on the base and a second connecting structure disposed on the battery box. The first connecting structure connects the base and the frame. The second connecting structure includes a connecting rod. A first end of the connecting rod is connected to the side of the battery box, and a second end of the connecting rod is configured to connect to the body. The battery system of the engineering machinery according to the embodiments of this disclosure can be effectively fixed in different directions, effectively improving the stability of the battery system.

Description

Technical Field

[0001] This disclosure relates to a type of engineering machinery. Background Technology

[0002] With increasing societal emphasis on environmental protection and carbon emission reduction, the electrification of commercial vehicles, such as construction machinery, is gradually accelerating.

[0003] To achieve longer operating times, construction machinery needs to be equipped with battery packs consisting of multiple stacked battery cells. The operating environments of construction machinery are often harsh, such as mines and construction sites, and the machinery experiences severe vibrations during operation. All of these factors negatively impact the stability of the battery packs. Therefore, improving the stability of the battery packs in construction machinery is an urgent problem to be solved.

[0004] It should be noted that the statements in this background section only provide background information related to this disclosure and do not necessarily constitute prior art. Summary of the Invention

[0005] This disclosure provides an engineering machine to improve the stability of a battery device.

[0006] The first aspect of this disclosure provides an engineering machine, comprising:

[0007] Frame;

[0008] The body is mounted on the chassis;

[0009] The battery system, mounted on the vehicle frame, includes:

[0010] Base;

[0011] A battery assembly, mounted on a base, comprises multiple battery packs stacked in the height direction, each battery pack including a battery housing and at least one battery module disposed within the battery housing; and

[0012] Connection components, including:

[0013] The first connecting structure is mounted on the base and connects the base and the frame; and

[0014] A second connection structure is disposed on the battery box and includes a connecting rod, the first end of which is connected to the side of the battery box and the second end of which is configured to be connected to the vehicle body.

[0015] In some embodiments, the connection assembly includes at least two second connection structures respectively disposed on the sides of different battery boxes, and the connecting rods of the at least two second connection structures are connected to different positions on the vehicle body.

[0016] In some embodiments, the battery box includes a base plate and side plates extending circumferentially along the base plate, the side plates and the base plate enclosing a receiving cavity for accommodating at least one battery module, the battery box having an opening disposed opposite to the base plate, and the base plate of the battery box of the upper battery pack in a plurality of battery packs covering the opening of the battery box of the lower battery pack.

[0017] In some embodiments, the battery device further includes a top cover that closes onto the opening of the battery compartment of the topmost battery pack among a plurality of battery packs.

[0018] In some embodiments, at least two reinforcing columns extending along the height direction are provided on the side plate, and at least two adjacent reinforcing columns are provided with a protrusion, and a groove is provided on the protrusion, the groove being formed as a connecting groove or a lifting groove.

[0019] In some embodiments, the second connection structure further includes a connector that is connected to the connection slot.

[0020] In some embodiments, the battery system includes at least two battery devices disposed on a base, and the connection assembly further includes a third connection structure, wherein the battery boxes of the at least two battery devices are connected by the third connection structure, the at least two battery devices are configured to be arranged in the longitudinal direction of the engineering machinery, and the third connection structure is configured to extend in the longitudinal direction.

[0021] In some embodiments, at least two battery devices are connected between battery boxes at the same height via a third connection structure.

[0022] In some embodiments, the engineering machinery further includes a shock-absorbing structure disposed on the first connecting structure.

[0023] In some embodiments, the frame includes a first frame extending in the lateral direction of the construction machinery and a second frame spaced apart from the first frame in the longitudinal direction, the second frame being configured to extend in the height direction, and a base support being connected to the first frame and the second frame.

[0024] In some embodiments, the second frame includes a ring structure, and at least a portion of the battery system is disposed within the space enclosed by the ring structure.

[0025] Based on the technical solution provided in this disclosure, the construction machinery includes a frame, a body, a battery system, and a connecting assembly. The battery system includes a base and a battery device mounted on the base. The battery device includes multiple battery packs stacked in the height direction, each battery pack including a battery box and at least one battery module disposed within the battery box. The connecting assembly includes a first connecting structure mounted on the base and a second connecting structure mounted on the battery box. The first connecting structure connects the base and the frame. The second connecting structure includes a connecting rod. A first end of the connecting rod is connected to the side of the battery box, and a second end of the connecting rod is configured to connect to the body. In this embodiment of the construction machinery, the base of the battery system is connected to the frame via the first connecting structure, and the side of the battery box of the battery device is connected to the body via the second connecting structure. This ensures that both the bottom and side surfaces of the battery system in this embodiment are connected and fixed to the body of the construction machinery, effectively fixing the battery system in different directions and significantly improving its stability.

[0026] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:

[0028] Figure 1 This is a three-dimensional structural schematic diagram of a battery system for engineering machinery according to some embodiments of the present disclosure.

[0029] Figure 2 for Figure 1 The diagram shows the main structural view of the battery system of the engineering machinery.

[0030] Figure 3 for Figure 1 The diagram shows a rear view of the battery system of the engineering machinery.

[0031] Figure 4 for Figure 1 The diagram shows a top view of the battery system of the engineering machinery.

[0032] Figure 5 for Figure 1 The diagram shows a side view of the battery system of the engineering machinery.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Frame; 11. First frame; 12. Second frame;

[0035] 2. Battery system; 21. Base; 22. Battery assembly; 22A. First battery assembly; 22B. Second battery assembly; 221. Battery pack; 2211. Battery box; 2211a. Base plate; 2211b. Side plate; 2211c. Reinforcing column; 2211d. Protrusion; A. Groove; 222. Top cover;

[0036] 3. Second connection structure;

[0037] 4. Third connection structure;

[0038] 5. Vibration-damping structure. Detailed Implementation

[0039] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0040] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0041] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0042] With the continuous development of electrification technology in construction machinery, the demand for power battery systems in construction machinery is constantly increasing, leading to the emergence of products equipped with battery systems of large tonnage, large capacity, and high voltage. Currently, there are very few construction machinery products on the market equipped with ultra-large capacity battery systems; most are concentrated within 1000kWh, and the installation of battery systems within 1000kWh is relatively simple. However, for battery systems above 1000kWh, which are heavy and large in size, the installation and subsequent disassembly and maintenance face significant challenges. Furthermore, due to the harsh operating environment of construction machinery, the stability of the battery system is also a current challenge.

[0043] refer to Figures 1 to 5 This disclosure provides engineering machinery in some embodiments, including a frame 1, a body, a battery system 2, and a connecting assembly. The battery system 2 includes a base 21 and a battery assembly 22 disposed on the base 21. The battery assembly 22 includes a plurality of battery packs 221 stacked in the height direction Z. Each battery pack 221 includes a battery box 2211 and at least one battery module disposed within the battery box 2211. The connecting assembly includes a first connecting structure disposed on the base 21 and a second connecting structure 3 disposed on the battery box 2211. The first connecting structure connects the base 21 and the frame 1. The second connecting structure 3 includes a connecting rod. A first end of the connecting rod is connected to the side of the battery box 2211, and a second end of the connecting rod is configured to connect to the body.

[0044] refer to Figure 1 In some embodiments, the construction machinery includes a frame 1 and a battery system 2 mounted on the frame 1. The battery system 2 includes a base 21 connected to the frame 1 and a battery assembly 22 mounted on the base 21. Specifically... Figure 1In the illustrated embodiment, two battery devices 22 are disposed on the base 21, namely a first battery device 22A and a second battery device 22B, each battery device 22 including a plurality of battery packs 221 stacked in the height direction Z. Figure 1 In the illustrated embodiment, the first battery device 22A includes four battery packs 221 stacked in the height direction Z, and the second battery device 22B includes five battery packs 221 stacked in the height direction Z.

[0045] The battery device 22 is connected to the base 21, and the base 21 is connected to the vehicle frame 1 through a first connecting structure. Specifically, the first connecting structure includes bolts and other connecting components. That is to say, the battery system of this embodiment achieves the connection between its bottom surface and the vehicle frame 1 through the first connecting structure. The bottom surface referred to here refers to the lowest surface of the battery system 2. Specifically, the base 21 is the lowest component in the battery system 2, and the lower surface of the base 21 constitutes the bottom surface of the battery system.

[0046] Further, refer to Figure 1 In this embodiment of the battery device, the battery box 2211 is further provided with a second connecting structure 3. The second connecting structure 3 is used to connect with the vehicle body, which is not shown in the figure. Here, the vehicle body refers to the structure of the construction machinery located on the side of the battery device. The vehicle body is located on the upper side of the frame. For example, the vehicle body can be a support beam, battery cover, etc. The second connecting structure 3 includes a connecting rod 31, which extends approximately along the transverse direction Y of the construction machinery. In this way, the battery system of this embodiment of the present disclosure achieves side connection with the vehicle body through the second connecting structure. The side refers to the surface of both sides of the battery system 2 in the transverse direction Y. Specifically, the two sides of the battery system 2 in the transverse direction Y are the side plates of the battery box 2211, and the surface of the side plates of the battery box 2211 constitutes the side of the battery system.

[0047] The frame is part of the chassis. During installation, the bottom surface of the battery system connects to the frame. In some embodiments, the frame and body are an integral structure. The frame is generally located at the bottom and supports other components of the construction machinery. The body is located on top of the frame; in other embodiments, the frame and body are separate structures. Therefore, the frame and body described in this disclosure refer to different locations of the construction machinery's body and do not limit whether the frame and body are integral or separate.

[0048] In this embodiment of the engineering machinery, the base 21 of the battery system is connected to the frame 1 through a first connecting structure, and the side of the battery box of the battery device of the battery system is connected to the vehicle body through a second connecting structure 3. This makes the bottom and side of the battery system of this embodiment of the engineering machinery connected and fixed to the vehicle body, that is, the battery system can be effectively fixed in different directions, effectively improving the stability of the battery system.

[0049] refer to Figures 1 to 5 In some embodiments, the connecting assembly includes at least two second connecting structures 3 respectively disposed on different battery boxes. The connecting rods of the at least two second connecting structures 3 are connected to different locations on the vehicle body.

[0050] Specifically, such as Figure 1 As shown, a second connecting structure 3 is connected to the side panel of the battery box of the top battery pack 221 of the second battery device 22B, and a second connecting structure 3 is also connected to the side panel of the battery box of the next top battery pack 221 of the second battery device 22B. That is, the two second connecting structures 3 are respectively set at different heights. Further, the second connecting structure 3 connected to the battery box of the top battery pack 221 is located at approximately the middle of the side panel, and the second connecting structure 3 connected to the battery box of the next top battery pack 221 is located near the end of the side panel. This makes at least two second connecting structures 3 of the battery system of this embodiment located at different positions in the height direction Z and / or at different positions in the longitudinal direction X.

[0051] At least two connecting rods of the second connecting structure 3 in this embodiment are connected to different positions on the vehicle body, further enhancing the connection reliability between the side of the battery system and the body, and effectively avoiding reliability failure caused by the failure of individual connecting structures.

[0052] In some embodiments, the second connection structure 3 is positioned closer to the top of the battery device to further enhance stability.

[0053] refer to Figure 1 In some embodiments, the battery case 2211 includes a base plate 2211b and a side plate 2211a extending circumferentially along the base plate 2211b. The side plate 2211a and the base plate 2211b enclose a receiving cavity for accommodating at least one battery module. The battery case 2211 has an opening disposed opposite to the base plate 2211b. The base plate 2211b of the battery case 2211 of the upper battery pack in a plurality of battery packs 221 covers the opening of the battery case 2211 of the lower battery pack.

[0054] refer to Figure 1The battery box 2211 has a square structure and includes a base plate 2211b and a side plate 2211a. The side plate 2211a extends circumferentially from the base plate 2211b and closes circumferentially to enclose a receiving cavity. A battery module, including a battery assembly, is disposed within the receiving cavity. The opening of the battery box 2211 is opposite to the base plate 2211b; specifically, the opening of the battery box 2211 is located at the top of the battery box 2211. The side plate 2211a of the battery box 2211 includes a side plate body extending in the height direction Z and an upper edge disposed at the top of the side plate body and extending outwards, the upper edge being approximately perpendicular to the side plate body. The bottom end of the side plate body is connected to the base plate 2211b, and the portion of the base plate 2211b located outside the side plate body forms a lower edge. When two adjacent battery boxes are connected, the lower edge of the base plate 2211b of the upper battery box is connected to the upper edge of the lower battery box via a connector.

[0055] When multiple battery packs are stacked, the battery boxes 2211 of the multiple battery packs are stacked so that the bottom plate 2211b of the battery box 2211 of the upper battery pack covers the opening of the battery box of the lower battery pack. In other words, in this embodiment of the present disclosure, the bottom plate of the upper battery box is formed as the cover of the battery box of the lower battery pack, thereby saving the space occupied by the cover in the height direction and improving the energy density of the battery system.

[0056] In some embodiments, the battery system 2 further includes a top cover 222. The top cover 222 closes onto the opening of the battery compartment of the topmost battery pack among a plurality of battery packs.

[0057] Specifically, such as Figure 1 As shown, the top cover 222 is connected to the upper edge of the battery box of the topmost battery pack.

[0058] In the battery system 2 of this embodiment, only the top battery pack has a top cover 222 specifically designed to seal its opening. The openings of the battery packs in other layers are sealed by the bottom plates of the top battery packs, thus reducing the overall weight of the battery system. Furthermore, it saves material for the covers, reducing costs.

[0059] refer to Figure 5 In some embodiments, the side plate 2211a is provided with at least two reinforcing posts 2211c extending along the height direction Z. At least two of the at least two reinforcing posts 2211c that are at least partially adjacent are provided with a protrusion 2211d, and the protrusion 2211d is provided with a groove A, which is formed as a connecting groove or a lifting groove.

[0060] like Figure 5As shown, in some embodiments, the reinforcing post 2211c extends downward from the top to the bottom. Specifically, the top of the reinforcing post 2211c is connected to the upper edge, and the bottom of the reinforcing post 2211c is connected to the lower edge. This allows the weight of the upper battery pack to be directly transferred to the bottom plate of the lower battery pack through the reinforcing post 2211c, thus strengthening the battery pack.

[0061] exist Figure 5 In the illustrated embodiment, six reinforcing posts 2211c are provided on one side of the side plate. Every two reinforcing posts 2211c are arranged adjacent to each other and a protrusion 2211d is provided between the two reinforcing posts 2211c. The protrusion 2211d occupies a large area, which further enhances the strength of the battery box.

[0062] The protrusion 2211d has multiple connecting holes and a groove A. The multiple connecting holes are arranged around the groove A. In some embodiments, the groove A is formed as a lifting slot. Since the battery pack in this embodiment needs to be stacked layer by layer, the battery box of the battery pack has a lifting slot to facilitate the lifting equipment to lift the battery pack through the lifting slot. In other embodiments, the groove A is formed as a connecting slot, for example in… Figure 5 The groove of the protrusion at the far left of the battery box in the battery pack located in the second-to-top layer forms a connecting groove, and the connecting seat of the second connecting structure can be inserted into the connecting groove to connect with the battery box.

[0063] In some embodiments, reference Figure 3 The second connecting structure 3 also includes a connecting seat 32. The connecting seat 32 is connected to the connecting groove.

[0064] In some embodiments, the battery system 2 includes at least two battery units 22 disposed on a base 21. The connection assembly further includes a third connection structure 4. The battery compartments of two adjacent battery units 22 are connected by the third connection structure 4, the at least two battery units 22 are configured to be arranged in the longitudinal direction X of the construction machinery, and the third connection structure 4 is configured to extend in the longitudinal direction X.

[0065] refer to Figure 1 and Figure 5 In some embodiments, at least two battery packs 22 located at the same layer height are connected by a third connecting structure 4. Specifically, both ends of the third connecting structure 4 are connected to connecting holes on the protrusions of the battery packs of the two battery packs 22, respectively. The third connecting structure 4 includes a connecting plate and a vibration damping pad.

[0066] In this embodiment, the battery packs of two adjacent battery devices 22 are connected by a third connecting structure 4, effectively ensuring that the two battery devices 22 can sway alternately left and right under high torque conditions, thus ensuring the structural stability of the battery system. Furthermore, this embodiment divides all battery packs of the battery system into a first battery device 22A and a second battery device 22B respectively arranged in the longitudinal direction X of the construction machinery. This avoids the problem of tipping over due to an excessively high center of gravity caused by excessive stacking, compared to simply stacking them in the height direction. Moreover, arranging at least two battery devices in the longitudinal direction X further distributes the weight of the battery system longitudinally, rather than concentrating it in one place, which is also more conducive to the load uniformity of the construction machinery's frame.

[0067] Furthermore, the battery system of this disclosure embodiment includes at least two battery devices spaced apart on the base, and the number of battery packs stacked on the at least two battery devices is different. The number of battery packs of the first battery device 22A, which is located further forward in the longitudinal direction X of the construction machinery, is less than the number of battery packs of the second battery device 22B, which is located behind the first battery device 22A. This arrangement is specifically designed to further improve stability.

[0068] Specifically, the number of battery packs in the first battery device 22A, which is located further forward, is set to be smaller, while the number of battery packs in the second battery device 22B, which is closer to the center, is set to be larger. This makes the center of gravity of the entire battery system closer to the center of gravity of the engineering machinery, avoiding the problem of off-center loading and further improving stability.

[0069] In some embodiments, the engineering machinery further includes a shock-absorbing structure 5 disposed on the first connecting structure.

[0070] Specifically, the damping structure 5 is installed on the first connecting structure. For example, when the first connecting structure is a bolt, the bolt is a bolt with a damping structure.

[0071] The base 21 of this embodiment is connected to the frame 1 through a first connecting structure with a shock-absorbing structure 5, thereby absorbing some vibration and effectively reducing the adverse effects of vibration on the battery system.

[0072] like Figures 1 to 4 As shown, in some embodiments, the frame 1 includes a first frame 11 extending in the lateral direction Y of the construction machinery and a second frame 12 spaced apart from the first frame 11 in the longitudinal direction X. The second frame 12 is configured to extend in the vertical direction Z, and a base 21 is supported and connected to the first frame 11 and the second frame 12.

[0073] The base 21 of the battery system 2 in this embodiment is supported on the first frame 11 and the second frame 12, and the first frame 11 and the second frame 12 are spaced apart in the longitudinal direction X, so that the base 21 is supported at different positions in the longitudinal direction, thereby further improving the stability of the battery system.

[0074] refer to Figure 1 In some embodiments, the second frame 12 includes an annular structure. At least part of the battery system is disposed within the space enclosed by the annular structure. Thus, the annular structure of the second frame 12 not only supports the battery system 2 but also provides a limiting effect on the battery system.

[0075] The following is based on Figures 1 to 5 The structure of an engineering machine according to a specific embodiment of the present disclosure will be described in detail.

[0076] like Figure 1 As shown, the battery system 2 of the engineering machinery in this embodiment includes a battery device 22. The battery device 22 includes a multi-layered stacked battery pack 221. The battery box of the battery pack is provided with protrusions 2211d to meet functional requirements such as fixed installation and hoisting. The battery pack is stacked in multiple layers and placed on a base 21. The base 21 is fixed to the vehicle frame by shock-absorbing structure 5 and bolts and other components. The two sides of the battery pack are connected to the vehicle through a second connecting structure 3. Two battery devices 22A and 22B are located in the front direction of the vehicle and connected by a third connecting structure 4, which can effectively fix the battery system in different directions, ensuring mechanical reliability and maintainability under harsh working conditions such as mining, and improving the mechanical safety of the battery system.

[0077] like Figure 1 As shown, the battery device 22A on the left is a four-layer battery pack, and the battery device 22B on the right is a five-layer battery pack. The bottom plate of the upper battery pack serves as the cover of the lower battery pack. The layers are stacked one on top of the other, with only the top battery pack's battery box having a top cover 222 installed. This saves material on the top cover of the battery pack and reduces the weight of the entire battery system.

[0078] Each battery pack has a protrusion 2211d welded onto its battery box. The protrusion 2211d has a lifting slot A and bolt holes, allowing a single battery pack to be lifted via the lifting slot A. The protrusions on the two battery units are connected to the vehicle frame via a second vibration-damping connection structure 3, ensuring the structural reliability of the battery system in the lateral direction Y. The battery packs on the two battery units are connected by two third connection structures 4 extending in the longitudinal direction X, ensuring the two battery units can sway alternately left and right under strong torque, thus ensuring the structural stability of the battery system. Furthermore, the two battery units are each bolted to the same base bracket 21, facilitating the overall lifting of the battery system onto the frame and enabling complete disassembly for maintenance. The base bracket 21 is connected to the frame via vibration-damping bolts.

[0079] As can be seen, the battery system in this embodiment is fixedly connected in the X, Y and Z directions to ensure the structural reliability of the battery system. The two battery devices are fixed on a base at the same time, which facilitates the overall installation and disassembly.

[0080] Furthermore, this disclosure is not limited to the integrated design of two battery devices. Based on the fixed design scheme of this embodiment, multiple integrated design modules of battery devices can be arranged according to the overall vehicle layout space to meet the power requirements of the main equipment of the construction machinery. For the power battery system with multiple battery devices, the arrangement position of the battery pack can be flexibly adjusted according to the limited space of the vehicle.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and not to limit them; although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this disclosure or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in this disclosure.

Claims

1. An engineering machinery, characterized in that, include: Frame (1); The vehicle body is mounted on the frame (1); Battery system (2), mounted on the frame (1) and comprising: Base (21); A battery assembly (22) is disposed on the base (21), and the battery assembly (22) includes a plurality of battery packs (221) stacked in the height direction (Z), each battery pack (221) including a battery box (2211) and at least one battery module disposed within the battery box (2211); and Connection components, including: A first connecting structure is disposed on the base (21) and connects the base (21) and the frame (1); and A second connection structure (3) is disposed on the battery box (2211) and the second connection structure (3) includes a connecting rod (31), the first end of which is connected to the side of the battery box (2211) and the second end of which is configured to be connected to the vehicle body.

2. The engineering machinery according to claim 1, characterized in that, The connecting assembly includes at least two second connecting structures (3) respectively disposed on the sides of different battery boxes, and the connecting rods of the at least two second connecting structures (3) are connected to different positions of the vehicle body.

3. The engineering machinery according to claim 1, characterized in that, The battery box (2211) includes a base plate (2211b) and a side plate (2211a) extending circumferentially along the base plate (2211b). The side plate (2211a) and the base plate (2211b) enclose a receiving cavity for accommodating the at least one battery module. The battery box (2211) has an opening opposite to the base plate (2211b). The base plate (2211b) of the battery box (2211) of the upper battery pack in the plurality of battery packs (221) covers the opening of the battery box (2211) of the lower battery pack.

4. The engineering machinery according to claim 3, characterized in that, The battery device (22) also includes a top cover (222) that covers the opening of the battery box of the topmost battery pack among the plurality of battery packs.

5. The engineering machinery according to claim 3, characterized in that, The side plate (2211a) is provided with at least two reinforcing columns (2211c) extending along the height direction (Z). At least two of the two reinforcing columns (2211c) that are at least partially adjacent are provided with a protrusion (2211d). The protrusion (2211d) is provided with a groove (A), which is formed as a connecting groove or a hoisting groove.

6. The engineering machinery according to claim 5, characterized in that, The second connection structure (3) further includes a connecting seat (32), which is connected to the connecting groove.

7. The engineering machinery according to any one of claims 1 to 6, characterized in that, The battery system (2) includes at least two battery devices (22) disposed on the base (21), and the connection assembly further includes a third connection structure (4) through which the battery boxes of the at least two battery devices (22) are connected. The at least two battery devices (22) are configured to be arranged in the longitudinal direction of the engineering machinery, and the third connection structure (4) is configured to extend along the longitudinal direction.

8. The engineering machinery according to claim 7, characterized in that, At least two battery units (22) located at the same level are connected by the third connection structure (4).

9. The engineering machinery according to any one of claims 1 to 6, characterized in that, The engineering machinery also includes a shock-absorbing structure (5) installed on the first connecting structure.

10. The engineering machinery according to any one of claims 1 to 6, characterized in that, The frame (1) includes: The first frame (11) extends in the lateral direction of the engineering machinery; The second frame (12) is spaced apart from the first frame (11) in the longitudinal direction and is configured to extend in the height direction (Z), and the base (21) is supported and connected to the first frame (11) and the second frame (12).

11. The engineering machinery according to claim 10, characterized in that, The second frame (12) includes an annular structure, and at least a portion of the battery system is disposed within the space enclosed by the annular structure.

Images