Hybrid power unit

Abstract

The utility model provides a hybrid power unit which comprises a base and a shell installed on the base, the base is provided with a diesel power generation mechanism, a power battery mechanism and a control mechanism, and the control mechanism is electrically connected with the diesel power generation mechanism and the power battery mechanism; the power battery mechanism comprises a battery rack and a battery pack detachably connected to the battery rack, a battery cavity unit used for containing the battery pack is formed in the battery rack, one side of the battery cavity unit is a battery pack inlet and outlet end, a bolt is arranged on the battery rack, and the bolt penetrates through the mounting hole to be in threaded fit with the screw hole. The screw holes are close to the inlet and outlet ends of the battery pack, mounting holes are formed in the cavity walls of the battery cavity units, and the screw holes are in threaded fit with bolts; the shell is provided with a maintenance port; and the maintenance port is communicated with the battery pack inlet and outlet ends of the battery cavity units. The utility model has the advantage that the battery pack is convenient to install or maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of generators, in particular to a hybrid power unit. Background Art

[0002] A hybrid power unit refers to a power unit that combines different power generation types. For example, it combines diesel power generation and power battery power generation. By integrating the advantages of multiple power generations, the hybrid power unit realizes the integration of energy efficiency, environmental friendliness, and operation flexibility, and is one of the important power solutions for modern industrial equipment such as telescopic mobile cranes.

[0003] The hybrid power unit in the prior art includes a cuboid-shaped base, a housing arranged on the base, a power generation mechanism, a power battery mechanism, and a control mechanism arranged in the base. The control mechanism and the power battery mechanism are opposite to each other along the width direction of the base. The power battery includes a battery rack and battery packs arranged on the battery rack. The battery rack is cuboid-shaped and is distributed along the length direction of the base. The battery packs are also cuboid-shaped and are distributed along the length direction of the battery rack. A plurality of screw holes are opened on the long side of the battery pack, and the screw holes are equally spaced along the length direction of the battery pack. The battery rack is provided with a plurality of mounting holes corresponding to the screw holes, and a plurality of bolts that are threadedly engaged with the screw holes are arranged on the battery rack. The plurality of bolts respectively pass through the plurality of mounting holes and the screw holes one by one, so as to fix the battery packs. During use, the power generation mechanism and the power battery mechanism are controlled by the control mechanism for hybrid power generation. During maintenance, since one long side of the battery pack is close to the control mechanism, the bolts on this long side are difficult to remove. Therefore, the housing needs to be removed, the plurality of bolts on the two long sides of the battery pack are removed, and the battery pack is taken out from the battery rack, then the battery pack can be repaired.

[0004] However, for the hybrid power unit in the related technology, during actual use, it is not convenient to install or repair the battery pack. Summary of the Utility Model

[0005] In order to improve the problem that it is not convenient to install or repair the power battery pack in the existing technology, the utility model provides a practical hybrid power unit that is convenient for disassembling and assembling the battery pack.

[0006] A hybrid power unit provided by the utility model adopts the following technical scheme:

[0007] A hybrid power unit includes a base and a housing installed on the base. The base is provided with a diesel power generation mechanism, a power battery mechanism, and a control mechanism. The control mechanism is electrically connected to the diesel power generation mechanism and the power battery mechanism;

[0008] The power battery mechanism includes a battery rack and a battery pack detachably connected to the battery rack. The battery rack forms a battery cavity unit for accommodating the battery pack. One side of the battery cavity unit is the battery pack access end. The battery pack is provided with a screw hole near the battery pack access end. The cavity wall of the battery cavity unit is provided with a mounting hole. A bolt is arranged on the battery rack, and the bolt passes through the mounting hole and is in threaded cooperation with the screw hole. The housing is provided with a maintenance opening, and the maintenance opening is communicated with the battery pack access end of the battery cavity unit.

[0009] Through the above technical solution, during operation, the control mechanism controls the working states of the diesel power generation mechanism and the power battery mechanism, so that the diesel power generation mechanism and the power battery mechanism cooperate coordinately. The diesel power generation mechanism drives the generator to generate electric energy by burning diesel, and the power battery mechanism stores or releases electric energy to achieve efficient energy utilization and flexible power output.

[0010] During installation, align the battery pack with the battery pack access end, extend the battery pack into the battery cavity unit, and align the mounting hole with the screw hole, so that the battery rack supports the battery pack. Then pass the bolt through the mounting hole and the screw hole to fix the battery pack, which can fix the battery pack and prevent it from shaking or falling. During maintenance, loosen the bolt fixing the battery pack to be repaired through the maintenance opening, and then the battery pack can be taken out from the battery pack access end for maintenance. The screw hole is close to the battery pack access end, and the maintenance opening is communicated with the battery pack access end of the battery cavity unit, so that workers do not need to remove the housing or reach too deep into the battery cavity unit. They only need to operate near the battery pack access end to conveniently disassemble and assemble, thus improving the disassembly and assembly efficiency of the battery pack.

[0011] Preferably, a partition is arranged on the base, and the partition is located between the diesel power generation mechanism and the power battery mechanism.

[0012] Through the above technical solution, separating the diesel power generation mechanism and the power battery mechanism by the partition is beneficial to reducing the mutual influence between the diesel power generation mechanism and the power battery mechanism caused by mechanical failures, leaks or other accidents.

[0013] Preferably, the battery rack includes fixing feet disposed on the base, vertical rods disposed on the fixing feet, and cross bars disposed on the vertical rods. The fixing feet are fixedly connected to the base. There are two groups of vertical rods, which are relatively distributed. The vertical rods in one group are arranged perpendicular to the direction in which the two groups of vertical rods face each other. The two groups of vertical rods enclose a battery cavity. The cross bars are located in the battery cavity. The cross bars are distributed along the direction in which the vertical rods in one group face each other. And the vertical rods in one group all extend into the cross bars and are fixedly connected to the cross bars. Two of the cross bars form a group. The two cross bars in one group are respectively connected to the two groups of vertical rods in a one-to-one correspondence. And the two cross bars are opposite to each other along the direction in which the two groups of vertical rods face each other. Multiple groups of cross bars are equidistantly distributed along the length direction of the vertical rods. The multiple groups of cross bars divide the battery cavity into multiple battery cavity units.

[0014] Through the above technical solution, during installation, by inserting the battery packs into the battery cavity units one by one and fixing the battery packs, the installation can be completed. Thus, with multiple battery cavity units, it is beneficial to reasonably install multiple battery packs.

[0015] Preferably, the cross bar is hollow, and reinforcing ribs are arranged inside the cross bar. There are multiple reinforcing ribs, and the multiple reinforcing ribs are equidistantly distributed along the length direction of the cross bar.

[0016] Through the above technical solution, the combination of the reinforcing ribs and the hollow structure of the cross bar is beneficial to reducing the use of materials, reducing the overall weight, and enabling the cross bar to have the required supporting force.

[0017] Preferably, the battery pack includes a lower cover and an upper cover that covers the lower cover. The lower cover is integrally formed with a support seat. The support seat includes a fixing portion and mounting portions arranged on both sides of the fixing portion. The fixing portion faces away from the upper cover. The two mounting portions are opposite to each other along the direction in which the two groups of vertical rods face each other. Two mounting holes are formed in a single cross bar. The two mounting holes are opposite to each other along the length direction of the cross bar. And the two mounting holes are respectively close to both ends of the cross bar in a one-to-one correspondence. Two screw holes are formed in a single mounting portion corresponding to the mounting holes.

[0018] Through the above technical solution, during installation, by inserting the battery packs into the battery cavity units one by one and aligning the mounting holes with the screw holes, so that a group of cross bars support the bottom of the battery pack. Then, bolts are passed through the mounting holes and the screw holes to fix the four corners of the battery pack, making the battery pack more stable and preventing it from shaking or falling. With four bolts, it is beneficial to reduce consumables and save installation time.

[0019] Preferably, a relief groove is also formed in the cross bar. The shape of the relief groove matches the upper cover on the side facing away from the lower cover.

[0020] Through the above technical solution, it is beneficial to adapt to the shape of the battery pack, and it is more smooth for the battery pack to extend into or out of the battery cavity unit.

[0021] Preferably, the battery cavity unit is provided with two battery pack access ends, the two battery pack access ends are opposite to each other along the length direction of the cross bar, two maintenance openings are provided, and the two maintenance openings are in one-to-one communication with the two battery pack access ends respectively. The battery pack is rectangular in shape and is distributed along the length direction of the cross bar.

[0022] Through the above technical solution, the battery packs are distributed along the length direction of the cross bar, that is, the ends of the battery packs face the inspection openings, which is beneficial to reducing the size of the inspection openings, and further reducing the gaps (door gaps) between the maintenance doors and the inspection openings, thereby being beneficial to reducing the entry of dust into the housing and also being beneficial to reducing the transmission of noise.

[0023] Preferably, maintenance doors are respectively provided on the maintenance openings, and the maintenance doors and the maintenance openings are mutually covered.

[0024] Through the above technical solution, the maintenance doors are beneficial to protecting the battery packs during use. During maintenance, by opening the maintenance doors, the battery packs can be quickly and conveniently disassembled, and then the battery packs can be repaired.

[0025] In summary, the utility model has the following beneficial effects:

[0026] 1. During installation, by aligning the battery packs with the battery pack access ends, inserting the battery packs into the battery cavity unit, and aligning the installation holes with the screw holes, the battery rack supports the battery packs. Then, bolts are passed through the installation holes and the screw holes to fix the battery packs, thereby fixing the battery packs and preventing them from shaking or falling.

[0027] 2. During maintenance, by the maintenance openings, the bolts fixing the battery pack to be repaired are loosened, and the battery pack can be taken out from the battery pack access ends, and then repaired. The screw holes are close to the battery pack access ends, and the maintenance openings are in communication with the battery pack access ends of the battery cavity unit, so that workers do not need to remove the housing and do not need to reach too deep into the battery cavity unit. They only need to operate near the battery pack access ends to conveniently disassemble and assemble, thereby improving the disassembly and assembly efficiency of the battery packs.

[0028] 3. A set of cross bars support the bottom of the battery packs, and then bolts are passed through the installation holes and the screw holes to fix the four corners of the battery packs, making the battery packs more stable and preventing them from shaking or falling. And through the four bolts, it is beneficial to reduce consumables and save installation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present utility model.

[0031] Figure 2 It is a schematic diagram of the structure inside the housing of the embodiment of the present utility model.

[0032] Figure 3 It is a schematic diagram of the assembly relationship between the battery rack and the battery pack in the embodiment of the present utility model.

[0033] Figure 4 It is a schematic diagram of the structure of the battery rack in the embodiment of the present utility model.

[0034] Figure 5 It is a schematic diagram of the structure of the reinforcing rib in the embodiment of the present utility model.

[0035] Figure 6 It is a schematic diagram of the structure of the battery pack in the embodiment of the present utility model.

[0036] Among them, the description of the component numbers is as follows: 1. Base; 2. Housing; 3. Diesel generator mechanism; 4. Power battery mechanism; 41. Battery rack; 411. Fixed feet; 412. Vertical rod; 413. Cross rod; 42. Battery pack; 421. Lower cover; 422. Upper cover; 423. Support seat; 4231. Fixed part; 4232. Installation part; 43. Battery chamber unit; 44. Screw hole; 45. Installation hole; 46. Reinforcing rib; 47. Relief groove; 48. Alignment groove; 5. Control mechanism; 6. Partition; 7. Maintenance door. Specific embodiments

[0037] The following will combine the attached Figures 1 to 6 in the embodiments of the present utility model to clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0038] A hybrid power unit, referring to Figure 1 And Figure 2, including a cuboid-shaped base 1 and a housing 2 mounted on the base 1. A diesel power generation mechanism 3, a partition 6, a power battery mechanism 4, and a control mechanism 5 are sequentially arranged from one end of the base 1 to the other end of the base 1. Among them, the diesel power generation mechanism 3 is used to burn diesel to generate electric energy, the power battery mechanism 4 is used to store or release electric energy, and the control mechanism 5 is used to control the working states of the diesel power generation mechanism 3 and the power battery mechanism 4. It should be noted that both the diesel power generation mechanism 3 and the control mechanism 5 are relatively mature technologies in the prior art and will not be elaborated too much. The diesel power generation mechanism 3 and the power battery mechanism 4 are both electrically connected to the control mechanism 5.

[0039] Refer to Figure 2 , the partition 6 is rectangular, and the partition 6 is distributed along the height direction of the base 1. The diesel power generation mechanism 3 and the power battery mechanism 4 are separated by the partition 6, which is beneficial to reducing the mutual influence between the diesel power generation mechanism 3 and the power battery mechanism 4 due to mechanical failures, leaks or other accidents.

[0040] During power generation, the control mechanism 5 is used to control the working states of the diesel power generation mechanism 3 and the power battery mechanism 4, so that the diesel power generation mechanism 3 and the power battery mechanism 4 cooperate coordinately. The diesel power generation mechanism 3 drives a generator to generate electric energy by burning diesel, and the power battery mechanism 4 stores or releases electric energy to achieve efficient energy utilization and flexible power output.

[0041] Specifically, refer to Figure 3 With Figure 4 , the power battery mechanism 4 includes a battery rack 41 and battery packs 42 detachably connected to the battery rack 41. Further, the battery rack 41 includes fixing feet 411 arranged on the base 1, vertical rods 412 arranged on the fixing feet 411, and cross rods 413 arranged on the vertical rods 412.

[0042] Refer to Figure 3 With Figure 4The fixing foot 411 is L-shaped, the short side of the fixing foot 411 abuts against the base 1 and is fixed to the base 1 by bolts, the long side of the fixing foot 411 is distributed along the height direction of the base 1, and the long side of the fixing foot 411 is fixedly connected to one side of the vertical rod 412. The vertical rod 412 is a square long rod, and the vertical rod 412 is distributed along the height direction of the base 1. There are four vertical rods 412, two vertical rods 412 form a group, and the two vertical rods 412 in one group are arranged along the width direction of the base 1. The two groups of vertical rods 412 are opposite to each other along the length direction of the base 1, so that a battery cavity is formed by the two groups of vertical rods 412. There are four fixed feet 411 corresponding to the vertical rods 412. The short sides of the four fixed feet 411 are fixedly connected to the base 1 by bolts, and the long sides of the four fixed feet 411 are fixedly connected to the four vertical rods 412 one by one, so that the vertical rods 412 are fixed by the fixed feet 411 to keep the vertical rods 412 distributed along the height direction of the base 1.

[0043] Reference Figure 4 and Figure 5 The crossbar 413 is a hollow long bar. The crossbar 413 is distributed along the width direction of the base 1 and is located in the battery cavity. An alignment groove 48 is provided on one long side of the crossbar 413. The alignment groove 48 passes through the upper and lower surfaces of the crossbar 413. The alignment groove 48 and the vertical rod 412 are matched in shape. There are two alignment grooves 48. The two vertical rods 412 in one group extend into the two alignment grooves 48 in a one-to-one correspondence, and the two vertical rods 412 in one group are fixedly connected to the groove walls of the two alignment grooves 48 in a one-to-one correspondence. The crossbar 413 away from the side of the alignment groove 48 faces the other group of vertical rods 412, so that one side of the battery pack 42 can be supported by the crossbar 413, and at the same time, the battery pack 42 can be limited by the vertical rod 412.

[0044] In addition, refer to Figure 5 A reinforcing rib 46 is provided in the cross bar 413, and a plurality of reinforcing ribs 46 are provided, and the plurality of reinforcing ribs 46 are evenly spaced along the length direction of the cross bar 413. The reinforcing rib 46 combined with the hollow structure of the cross bar 413 is conducive to reducing the use of materials, reducing the overall weight, and enabling the cross bar 413 to have the required supporting force.

[0045] Reference Figure 4 and Figure 5, there are multiple crossbars 413. Two crossbars 413 form a group. The two crossbars 413 in a group are correspondingly connected to two groups of vertical bars 412 one by one. And the two crossbars 413 are opposite to each other along the length direction of the base 1. Multiple groups of crossbars 413 are equally spaced along the length direction of the vertical bars 412. Thus, the battery cavity is divided into multiple battery cavity units 43 by multiple groups of crossbars 413. That is, there is a battery cavity unit 43 between two adjacent groups of crossbars 413. The battery cavity unit 43 is used to accommodate the battery pack 42. And the battery cavity unit 43 is rectangular in shape. The battery cavity units 43 are distributed along the width direction of the base 1. Both ends of the battery cavity unit 43 are the access ends for the battery pack.

[0046] During installation, the battery packs 42 are inserted into the battery cavity units 43 one by one through the access ends for the battery pack, and the battery packs 42 are fixed, then the installation can be completed. Thus, with multiple battery cavity units 43, it is beneficial to reasonably install multiple battery packs 42.

[0047] In this embodiment, referring to Figure 5 and Figure 6 , there are multiple battery packs 42 corresponding to the number of battery cavity units 43. Among them, the battery pack 42 includes a rectangular lower cover 421 and an upper cover 422 that covers the lower cover 421. The lower cover 421 and the upper cover 422 are connected by bolts. The lower cover 421 is integrally formed with a support seat 423. The support seat 423 includes a fixing part 4231 and mounting parts 4232 arranged on both sides of the fixing part 4231. The fixing part 4231 is in the shape of a rectangular plate. The fixing part 4231 is distributed along the length direction of the lower cover 421. The fixing part 4231 faces away from the upper cover 422, which is beneficial to make the lower cover 421 placed more stably. The mounting part 4232 is in the shape of a square long rod. The mounting part 4232 is distributed along the length direction of the fixing part 4231. The mounting part 4232 is connected to the long side of the fixing part 4231. The two mounting parts 4232 are opposite to each other along the width direction of the fixing part 4231.

[0048] Continuing to refer to Figure 5 and Figure 6 , there are screw holes 44 on the mounting part 4232. The screw holes 44 penetrate through the upper and lower surfaces of the mounting part 4232. There are two screw holes 44 on a single mounting part 4232. The two screw holes 44 are respectively close to both ends of the mounting part 4232. Thus, the screw holes 44 are close to a corner of the lower cover 421. Combining Figure 4, the cross bar 413 is provided with a mounting hole 45, and the mounting hole 45 passes through the upper and lower surfaces of the cross bar 413. Similarly, a single cross bar 413 is provided with two mounting holes 45, and the two groups of mounting holes 45 are respectively close to the two ends of the cross bar 413. The cross bar 413 is also provided with bolts, and the bolts are threadedly matched with the screw holes 44. There are two bolts corresponding to the number of screw holes 44. During installation, the battery pack 42 is inserted into the battery cavity unit 43, and the two screw holes 44 are aligned one by one with the two mounting holes 45. One end of the bolt is passed through the mounting hole 45 and the screw hole 44 to fix the battery pack 42. By fixing the bolts of the two cross bars 413 in one group to the battery pack 42, the four corners of the battery pack 42 are fixed, which is conducive to more stable fixing of the battery pack 42.

[0049] During installation, by facing the end of the battery pack 42 toward the battery pack access end, and extending the battery pack 42 one by one into the battery cavity unit 43 along the length direction of the cross bar 413, and aligning the mounting hole 45 with the screw hole 44, a group of cross bars 413 support the bottom of the battery pack 42, and then pass the bolts through the mounting holes 45 and the screw holes 44 to fix the four corners of the battery pack 42, so that the battery pack 42 is fixed more stably to prevent shaking or falling. The four bolts are helpful to reduce consumables and save installation time. During maintenance, by loosening the bolts at the four corners of the battery pack 42 to be repaired, the battery pack 42 can be pulled out along the length direction of the cross bar 413 to repair the battery pack 42. In addition, the screw hole 44 is close to the end of the mounting portion 4232, and the mounting hole 45 is close to the end of the cross bar 413, so that the worker does not need to remove the shell 2, nor does he need to extend too far into the battery cavity unit 43. He only needs to operate near the battery pack access end to conveniently disassemble and assemble, thereby improving the efficiency of disassembly and assembly.

[0050] In addition, refer to Figure 4 and Figure 5 A clearance groove 47 is also provided on the cross bar 413, and the shape of the clearance groove 47 cooperates with the upper cover 422 on the side away from the lower cover 421 (in an arc shape), so as to adapt to the shape of the battery pack 42 and facilitate the battery pack 42 to extend into or out of the battery cavity unit 43 more smoothly.

[0051] Reference Figure 1 and Figure 2, a maintenance opening is provided on the long side of the housing 2. The maintenance opening is square and penetrates through the inner and outer surfaces of the housing 2. The maintenance opening is communicated with the battery pack access end of the battery chamber unit 43. The maintenance opening is close to the battery rack 41. There are four maintenance openings. Two maintenance openings form a group. The two maintenance openings in a group are arranged along the height direction of the base 1. The two groups of maintenance openings are opposite to each other along the width direction of the base 1. Maintenance doors 7 are provided on all the maintenance openings. The maintenance doors 7 and the maintenance openings are mutually covered. The maintenance doors 7 are beneficial to protecting the battery pack 42 during use. During maintenance, by opening the maintenance doors 7, the battery pack 42 can be quickly and conveniently disassembled, and then the battery pack 42 can be maintained.

[0052] In addition, the end of the battery pack 42 faces the inspection opening, which is beneficial to reducing the size of the inspection opening, thereby reducing the gap (door gap) between the maintenance door 7 and the inspection opening, which is beneficial to reducing the entry of dust into the housing 2 and also beneficial to reducing the transmission of noise.

[0053] The implementation principle of this application is: by controlling the control mechanism 5 to control the working states of the diesel power generation mechanism 3 and the power battery mechanism 4, so that the diesel power generation mechanism 3 and the power battery mechanism 4 cooperate coordinately. The diesel power generation mechanism 3 drives a generator to generate electric energy by burning diesel, and stores or releases electric energy through the power battery mechanism 4 to achieve efficient energy utilization and flexible power output.

[0054] During installation, by orienting the end of the battery pack 42 towards the battery pack access end and inserting the battery packs 42 into the battery chamber unit 43 one by one along the length direction of the cross bar 413, and aligning the installation holes 45 with the screw holes 44, a group of cross bars 413 support the bottom of the battery pack 42. Then, bolts are passed through the installation holes 45 and the screw holes 44 to fix the four corners of the battery pack 42, and the battery pack 42 can be stably fixed to prevent shaking or falling. During maintenance, by opening the maintenance doors 7 on both sides and loosening the bolts at the four corners of the battery pack 42 to be maintained, the battery pack 42 can be pulled out along the length direction of the cross bar 413 to maintain the battery pack 42, so that the worker does not need to remove the housing 2 and does not need to reach too deep into the battery chamber unit 43. Only by operating near the battery pack access end can the disassembly and assembly be conveniently carried out, thereby improving the disassembly and assembly efficiency.

[0055] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A hybrid power unit, comprising a base (1) and a housing (2) mounted on the base (1), characterized in that: The base (1) is provided with a diesel power generation mechanism (3), a power battery mechanism (4) and a control mechanism (5), and the control mechanism (5) is electrically connected to the diesel power generation mechanism (3) and the power battery mechanism (4); The power battery mechanism (4) includes a battery rack (41) and a battery pack (42) detachably connected to the battery rack (41). The battery rack (41) forms a battery cavity unit (43) for accommodating the battery pack (42). One side of the battery cavity unit (43) is the access end of the battery pack. The battery pack (42) is provided with a screw hole (44) near the access end of the battery pack. The cavity wall of the battery cavity unit (43) is provided with a mounting hole (45). A bolt is provided on the battery rack (41), and the bolt passes through the mounting hole (45) and is in threaded cooperation with the screw hole (44); The housing (2) is provided with a maintenance opening, and the maintenance opening communicates with the access end of the battery pack of the battery cavity unit (43).

2. The hybrid power unit according to claim 1, wherein: A partition (6) is provided on the base (1), and the partition (6) is located between the diesel power generation mechanism (3) and the power battery mechanism (4).

3. A hybrid power unit according to claim 1, characterized in that: The battery rack (41) includes fixed feet (411) provided on the base (1), vertical rods (412) provided on the fixed feet (411), and cross rods (413) provided on the vertical rods (412). The fixed feet (411) are fixedly connected to the base (1). There are two groups of vertical rods (412), and the two groups of vertical rods (412) are distributed oppositely. The vertical rods (412) in one group are arranged perpendicular to the direction in which the two groups of vertical rods (412) face each other. The two groups of vertical rods (412) surround to form a battery cavity. The cross rod (413) is located in the battery cavity. The cross rod (413) is distributed along the direction in which the two groups of vertical rods (412) face each other, and the vertical rods (412) in one group all extend into the cross rod (413) and are fixedly connected to the cross rod (413). Two cross rods (413) are in a group, and the two cross rods (413) in one group are respectively connected to the two groups of vertical rods (412), and the two cross rods (413) are opposite along the direction in which the two groups of vertical rods (412) face each other. Multiple groups of cross rods (413) are equidistantly distributed along the length direction of the vertical rods (412), and the multiple groups of cross rods (413) divide the battery cavity into multiple battery cavity units (43).

4. A hybrid power unit according to claim 3, characterized in that: The cross rod (413) is hollow, and reinforcing ribs (46) are arranged inside the cross rod (413). There are multiple reinforcing ribs (46), and the multiple reinforcing ribs (46) are equidistantly distributed along the length direction of the cross rod (413).

5. A hybrid power unit according to claim 3, characterized in that: The battery pack (42) includes a lower cover (421) and an upper cover (422) that is covered with the lower cover (421). The lower cover (421) is integrally formed with a support base (423). The support base (423) includes a fixing portion (4231) and mounting portions (4232) provided on both sides of the fixing portion (4231). The fixing portion (4231) faces away from the upper cover (422). The two mounting portions (4232) are opposite to each other along the direction in which the two sets of vertical rods (412) face each other. Two mounting holes (45) are formed in a single cross bar (413). The two mounting holes (45) are opposite to each other along the length direction of the cross bar (413), and the two mounting holes (45) are respectively close to both ends of the cross bar (413). Two screw holes (44) are provided in a single mounting portion (4232) corresponding to the mounting holes (45).

6. A hybrid power unit according to claim 3, characterized in that: A relief groove (47) is also formed in the cross bar (413). The shape of the relief groove (47) is matched with the upper cover (422) on the side facing away from the lower cover (421).

7. A hybrid power unit according to claim 3, characterized in that: The battery chamber unit (43) is provided with two battery pack access ends. The two battery pack access ends are opposite to each other along the length direction of the cross bar (413). Two maintenance openings are formed. The two maintenance openings are respectively communicated with the two battery pack access ends. The battery pack (42) is rectangular in shape. The battery pack (42) is distributed along the length direction of the cross bar (413).

8. A hybrid power unit according to claim 7, characterized in that: Maintenance doors (7) are respectively covered on the maintenance openings. The maintenance doors (7) are covered with the maintenance openings.

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