Portable power supply equipment

Abstract

The portable power supply equipment comprises an electric energy generating device and a machine shell, the machine shell comprises an upper machine shell body, a lower machine shell body and a connecting piece between the upper machine shell body and the lower machine shell body, the connecting piece is arranged at an opening of the upper machine shell body and an opening of the lower machine shell body, and the connecting piece is connected and matched with the upper machine shell body and the lower machine shell body to form a shell sealing electric energy generating device; the two sides of the top of the upper machine shell in the width direction are each provided with a handle, and the handles are longitudinally arranged in the length direction of the machine shell. A roller device A is arranged on the rear side of the lower machine shell, a drawing type pull rod device is longitudinally arranged at the bottom of the lower machine shell in the length direction of the machine shell, and a pull rod handle of the pull rod device is arranged on the front side face of the lower machine shell. A lifting handle is further transversely arranged on the front side face of the machine shell and arranged on a lifting handle cover, the top of the lifting handle cover is connected with the upper machine shell through a fastener, and the bottom of the lifting handle cover is connected with the lower machine shell through a fastener. The device has the advantages of being convenient, convenient to move, convenient to use and low in cost.

Description

Technical Field

[0001] This invention relates to the field of mobile power generation and supply equipment, specifically a portable power supply device. Background Technology

[0002] In existing technologies, portable power supply equipment mainly includes four categories of products: portable power storage devices, generator sets driven by internal combustion engines, solar photovoltaic power stations, and welding machines. These power supply devices have a wide range of applications, such as backup power, emergency power, power supply and generation in areas with power shortages, and welding of materials.

[0003] Existing power supply equipment has a complex casing structure, high manufacturing cost, and is relatively bulky. The overall design lacks portability, the roller design is not reasonable and it is difficult to adapt to complex road surfaces, and the handle design is simple and not convenient to move. Summary of the Invention

[0004] The purpose of this invention is to provide a portable power supply device, which aims to improve the problems of insufficient portability of existing power supply devices, unreasonable roller design, difficulty in adapting to complex road surfaces, and simple handle design structure, making it inconvenient to move.

[0005] This invention is implemented as follows:

[0006] A portable power supply device includes a power generating device and a housing. The housing includes an upper housing, a lower housing, and a connecting member between the upper and lower housings. The connecting member is disposed at the openings of the upper and lower housings and is connected and cooperates with the upper and lower housings to form a housing that encloses the power generating device. A handle is provided on each of the two sides of the top of the upper housing in the width direction, and the handle is longitudinally arranged along the length direction of the housing. A roller device A is provided on the rear side of the lower housing, and a pull-out lever device is longitudinally arranged on the bottom of the lower housing along the length direction of the housing. The lever handle is located on the front side of the lower housing. A handle is also transversely arranged on the front side of the housing, and the handle is disposed on a handle cover. The top of the handle cover is connected to the upper housing by fasteners, and the bottom of the handle cover is connected to the lower housing by fasteners.

[0007] Furthermore, a U-shaped locking piece is provided at the opening of the upper and lower housings. The opening of the U-shaped locking piece is locked at the edge of the opening of the upper and lower housings. The U-shaped locking piece is provided with a threaded hole. The connector is provided with a first connecting hole. The screw passes through the first connecting hole and connects with the U-shaped locking piece to connect the connector to the upper and lower housings together.

[0008] Furthermore, the upper and lower housings are made of plastic material, the connectors are made of metal sheet, and the upper and / or lower edges of the connectors are provided with a reverse folding and flattening reinforcement structure, which consists of two layers of metal sheet to prevent deformation of the sheet.

[0009] Furthermore, the left and right sides of the handle cover are connected to the connector by fasteners, and the handle cover is provided with a pivot, through which the handle and the handle cover are rotatably connected.

[0010] Furthermore, the handle is connected to the top of the upper housing by at least two pressure blocks via fasteners. Each pressure block has a pressure block groove, and the pressure blocks are distributed along the length of the handle. The shape of the pressure block groove matches the shape of the handle. The pressure blocks are disposed on the outside of the handle. A housing groove is provided on the upper housing opposite the pressure blocks, and the handle is fixed between the housing groove and the pressure block groove.

[0011] Furthermore, the pressure block is composed of a pressure block metal part and a pressure block rubber part attached thereto. The pressure block metal part has a metal part groove, and first rivet screws are provided at both ends of the metal part groove. The outer side of the root of the first rivet screw is covered with an outwardly protruding pressure block rubber part. Second connecting holes are provided at both ends of the housing groove. The first rivet screw passes through the second connecting holes and fixes the handle to the top of the upper housing through a first nut. An inward concave structure is provided on the top of the upper housing between the two pressure blocks. The inward concave structure is formed between the handle and the housing to form a space for gripping the handle.

[0012] Furthermore, a roller device B is provided on the rear side of the upper housing. The roller axis of roller device B is parallel to the roller axis of roller device A. The outer diameter d of roller device B is smaller, and the outer diameter D of roller device A is larger, with the size relationship being d... <D / 2。

[0013] Furthermore, the bottom of the lower housing is provided with a protruding support foot, which is composed of a support foot metal part and a support foot rubber part attached thereto. A second rivet screw is provided on the support foot metal part, and the outer side of the root of the second rivet screw is covered by the protruding support foot rubber part. The support foot is connected to the bottom of the lower housing by the second rivet screw and a second nut on the inner side of the housing. When the two portable power supply devices are stacked one on top of the other, the protruding support foot at the bottom of the upper portable power supply device is inserted into the concave structure between the top handle and the housing of the lower portable power supply device to achieve positioning.

[0014] Furthermore, a stacking plug is provided on the top of the upper housing, and a stacking socket is provided on the bottom of the lower housing. Both the stacking plug and the stacking socket are electrically connected to the power generating device. The stacking plug is provided with a protruding limiting post, and the stacking socket is provided with a recessed limiting hole. When the two portable power supply devices are stacked one on top of the other, the limiting post on the top stacking plug of the lower portable power supply device is inserted into the limiting hole on the bottom stacking socket of the upper portable power supply device to achieve positioning. At the same time, the conductors on the stacking plug and the socket make contact to achieve electrical connection between the upper and lower devices.

[0015] Furthermore, a handle is horizontally provided on the top of the rear side of the upper housing; an air inlet hood and an air outlet hood are provided on the housing; an air inlet hood is provided on the air inlet hood; an air outlet hood is provided on the air outlet hood; a cooling fan is provided inside the air outlet hood; and socket panels for installing sockets are provided on the left and right sides of the lower housing; the connector is provided with a control switch, an input interface, an output interface, and / or a display screen; the socket panel, control switch, input interface, output interface, and display screen are all electrically connected to the power generating device.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The housing of the present invention is formed by upper and lower housings and connectors. The housing made of plastic material is lighter in weight. The connectors made of metal material are integrated with the electrical panel. Two sets of through-type multi-segment longitudinal handles are provided on the top of the housing along the length direction. A horizontal handle is provided on the front side of the housing. A horizontal pull handle is provided on the top of the rear side of the upper housing, thereby forming an all-round gripping structure on the body, which effectively improves the convenience of the present invention.

[0018] 2. The present invention has two sets of rollers with small diameter and large diameter respectively set on the rear side of the upper and lower casings, thus forming a four-wheel chassis structure on the rear side of the casing. Users can switch between using the four-wheel chassis or the two large-diameter rollers at any time according to the road conditions, which can adapt to complex road surfaces and make the present invention very convenient to move.

[0019] 3. The present invention adopts a stacked structure design, and two devices can be stacked one on top of the other for quick electrical connection, which is very convenient to use.

[0020] 4. The present invention directly sets control switches, input interfaces, output interfaces and display screens on the connector, which is equivalent to combining the electrical panel and the connector into one, further reducing costs. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2This is the front view of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the upper housing of the present invention;

[0024] Figure 4 This is a three-dimensional structural diagram of the lower housing of the present invention;

[0025] Figure 5 This is a three-dimensional structural diagram of the connector on one side of the present invention;

[0026] Figure 6 This is a three-dimensional structural diagram of the connector on the other side of the present invention;

[0027] Figure 7 This is a cross-sectional schematic diagram showing the connection of the upper housing, lower housing, and connecting parts of the present invention;

[0028] Figure 8 This is a three-dimensional structural diagram of the pressing block of the present invention;

[0029] Figure 9 This is a cross-sectional schematic diagram of the position of the pressure block fixing handle of the present invention;

[0030] Figure 10 This is a cross-sectional schematic diagram of the support foot fixing structure of the present invention;

[0031] Figure 11 This is a three-dimensional structural schematic diagram of the pull rod device of the present invention;

[0032] Figure 12 This is an exploded structural diagram of the handle cover and handle of the present invention;

[0033] Figure 13 This is a three-dimensional structural schematic diagram of the stacked plug of the present invention;

[0034] Figure 14 This is a three-dimensional structural diagram of the stacked socket of the present invention;

[0035] Figure 15 This is a three-dimensional structural diagram of the air outlet cover and cooling fan of the present invention.

[0036] In the diagram: 1. Upper housing; 2. Lower housing; 3. Connector; 4. Handle; 5. Pull rod device; 6. Handle cover; 7. Handle; 8. U-shaped locking plate; 9. Threaded hole; 10. First connecting hole; 11. Screw; 12. Reverse folding and flattening reinforcement structure; 13. Rotating shaft; 14. Pressure block; 15. Pressure block groove; 16. Housing groove; 17. Pressure block metal part; 18. Pressure block rubber part; 19. First rivet screw; 20. First nut; 21. Concave structure 22. Metal part groove; 23. Support foot; 24. Support foot metal part; 25. Support foot rubber part; 26. Second press-fit screw; 27. Second nut; 28. Stacking plug; 29. ​​Stacking socket; 30. Limiting post; 31. Limiting hole; 32. Handle; 33. Display screen; 34. Air outlet cover; 35. Cooling fan; 36. Socket panel; 37. Control switch; 38. Input interface; 39. Output interface; 40. Second connection hole. Detailed Implementation

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0039] The power supply equipment in this application mainly includes the following four categories of products: portable power storage, generator sets driven by internal combustion engines, solar photovoltaic power stations, and welding machines.

[0040] Energy storage power supplies mainly include batteries, inverters, and controllers. They can charge batteries from mains power, solar power, wind power, or various fuel generators. Inverters can convert the DC power from the batteries into AC power output. Of course, various DC outputs can also be added as needed. Controllers can add various protection functions and control input and output.

[0041] A generator set mainly consists of an engine, a generator, and an electronic control system. Driven by the engine, the generator outputs electrical energy, converting the chemical energy of fuel or natural gas into electrical energy. Digital generators also include an inverter, which converts the intermediate-frequency AC power output from the generator into stable industrial-frequency AC power at various speeds.

[0042] Solar photovoltaic power stations use solar panels to convert solar energy into electrical energy, and then use inverters and electronic control systems to convert the direct current (DC) from the solar panels or batteries into alternating current (AC) for output. Welding machines mainly consist of a transformer and an electronic control system. The transformer steps down the AC / DC power from the mains, generator, or battery, and the electronic control system processes this power to output low-voltage, high-current AC and / or DC power. This high current is used to melt metal materials for welding.

[0043] This invention includes a power generation device, which varies depending on the four types of power supply equipment mentioned above. The power generation device for a portable energy storage power supply mainly consists of a battery, an inverter, and a controller; the power generation device for a generator set mainly consists of an engine, a generator, and an inverter; the power generation device for a solar photovoltaic power station mainly consists of an inverter and an electronic control system, and for energy storage solar power stations, it also includes a battery; the power generation device for a welding machine mainly consists of a transformer and an electronic control system.

[0044] like Figures 1-4 as well as Figure 7 As shown, the present invention has a housing, which includes an upper housing 1, a lower housing 2, and a connecting member 3 between the upper and lower housings 2. The upper housing 1 and the lower housing 2 are made of plastic material, and the connecting member 3 is made of metal sheet. The lower end of the upper housing 1 is open, and the upper end of the lower housing 2 is open. The connecting member 3 is located at the openings of the upper and lower housings 2, and the connecting member 3 connects and cooperates with the upper and lower housings 2 to form a housing-enclosed power generation device. A U-shaped locking piece 8 is provided at the opening of the upper housing 1 and the lower housing 2. The opening of the U-shaped locking piece 8 is locked at the edge of the opening of the upper and lower housings 2, and the U-shaped locking piece 8 is provided with a threaded hole 9. The upper and lower edges of the connecting member 3 are provided with a reverse-folding and flattening reinforcing structure 12, which is provided with two layers of metal sheet to prevent the sheet from deforming. The connector 3 is provided with a first connecting hole 10. The screw 11 passes through the first connecting hole 10 and is connected to the U-shaped locking piece 8 to connect the connector 3 to the upper and lower housings 2.

[0045] like Figure 1 , Figure 3 , Figure 8 and Figure 9As shown in the figure, on both sides of the top width direction of the upper housing 1, a handle 4 is provided respectively, and the handle 4 is longitudinally arranged along the length direction of the housing. Each handle 4 is connected to the top of the upper housing 1 by three pressing blocks 14 through fasteners, and these three pressing blocks 14 are distributed in the length direction of the handle 4. The pressing block 14 has a pressing block groove 15, and the shape of the pressing block groove 15 matches the shape of the handle 4. For example, if the handle 4 is cylindrical, the pressing block groove 15 is semi-cylindrical, etc. The pressing block 14 is arranged outside the handle 4, and a housing groove 16 is arranged on the upper housing 1 opposite to the pressing block 14, and the handle 4 is fixed between the housing groove 16 and the pressing block groove 15. The pressing block 14 is composed of a pressing block metal part 17 and a pressing block rubber part 18 attached thereto. The pressing block metal part 17 has a metal part groove 22, and at both ends of the metal part groove 22, a first press riveting screw 19 is provided. The outer side of the root of the first press riveting screw 19 is covered with the protruding pressing block rubber part 18. Second connecting holes 40 are arranged at both ends of the housing groove 16, and the first press riveting screw 19 passes through the second connecting hole 40 and fixes the handle 4 to the top of the upper housing 1 through a first nut 20; an inward concave structure 21 is arranged on the top of the upper housing 1 between the two pressing blocks 14, and the inward concave structure 21 is formed between the handle 4 and the housing. The clearance distance between the inward concave structure 21 and the handle 4 should be large enough to form a space for grasping the handle 4.

[0046] As Figure 1 , Figure 11 and Figure 12 shown in the figure, a pull-out rod device 5 is longitudinally arranged along the length direction of the housing at the bottom of the lower housing 2, and the rod handle of the rod device 5 is arranged on the front side of the lower housing 2. A handle 7 is also horizontally arranged on the front side of the housing, and the handle 7 is arranged on the handle cover 6. The top of the handle cover 6 is connected to the upper housing 1 through fasteners, and the bottom of the handle cover 6 is connected to the lower housing 2 through fasteners. The left side and the right side of the handle cover 6 are connected to the connecting member 3 through fasteners. A rotating shaft 13 is arranged on the handle cover 6, and the handle 7 is rotationally connected to the handle cover 6 through the rotating shaft 13. In addition, a handle 32 is also horizontally arranged at the top of the rear side of the upper housing 1.

[0047] As Figure 1 and Figure 2 shown in the figure, a roller device A is arranged at the rear side of the lower housing 2, and a roller device B is arranged on the rear side of the upper housing 1. There are two roller devices A and two roller devices B, which are respectively arranged at the four corners of the rear side of the housing. The roller axes of the roller device B are arranged parallel to the roller axes of the roller device A, and the outer diameter d of the rollers of the roller device B is smaller than the outer diameter D of the rollers of the roller device A, and the size relationship is d < D / 2. Therefore, the present invention includes two large rollers and two small rollers. When moving on a flat road surface, the present invention can be erected and easily moved by using the four-wheel chassis composed of the large and small rollers. When the road surface condition is poor, the device can be tilted forward and moved by using the large rollers. The large rollers have a large diameter, a high chassis, and good passability, and can adapt to various complex road surfaces such as potholes and grasslands.

[0048] like Figure 1 , Figure 2 and Figure 10 As shown, the bottom of the lower housing 2 is provided with a protruding support foot 23. The support foot 23 is composed of a support foot metal part 24 and a support foot rubber part 25 attached thereto. A second rivet screw 26 is provided on the support foot metal part 24. The outer side of the root of the second rivet screw 26 is covered by the protruding support foot rubber part 25. The support foot 23 is connected to the bottom of the lower housing 2 by the second rivet screw 26 and the second nut 27 on the inside of the housing. When the two portable power supply devices are stacked one on top of the other, the protruding support foot 23 at the bottom of the upper portable power supply device is inserted into the concave structure 21 between the top handle 4 and the housing of the lower portable power supply device for positioning.

[0049] like Figure 1 , Figure 2 , Figure 13 and Figure 14 As shown, a stacking plug 28 is provided on the top of the upper housing 1, and a stacking socket 29 is provided on the bottom of the lower housing 2. Both the stacking plug 28 and the stacking socket 29 are electrically connected to the power generating device. The stacking plug 28 is provided with a protruding limiting post 30, and the stacking socket 29 is provided with a recessed limiting hole 31. When two portable power supply devices are stacked one on top of the other, the limiting post 30 on the top stacking plug 28 of the lower portable power supply device is inserted into the limiting hole 31 on the bottom stacking socket 29 of the upper portable power supply device to achieve positioning. At the same time, the conductors on the stacking plug 28 and the stacking socket 29 make contact to achieve electrical connection between the upper and lower devices. In this way, when two or more portable power supply devices need to be connected for power or communication, no external wires are required. The portable power supply devices can be stacked one on top of the other and quickly connected electrically through the stacking plug 28 and the stacking socket 29, which is very convenient to use.

[0050] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 15As shown, the casing is equipped with an air inlet hood and an air outlet hood 34. The air inlet hood has an air inlet, and the air outlet hood 34 has an air outlet. A cooling fan 35 is installed inside the air outlet hood 34. When the cooling fan 35 is activated, outside air enters the casing through the air inlet of the air inlet hood and is exhausted through the air outlet of the air outlet hood 34, simultaneously carrying away the heat generated by the power generator during operation. The left and right sides of the lower casing 2 are equipped with socket panels 36 for mounting sockets. The connector 3 is equipped with a control switch 37, an input interface 38, an output interface 39, and / or a display screen 33. The socket panel 36, control switch 37, input interface 38, output interface 39, and display screen 33 are all electrically connected to the power generator. External devices can be electrically connected to the power generator through the sockets on the socket panel 36. This invention directly integrates the control switch 37, input interface 38, output interface 39, and display screen 33 onto the connector 3, effectively combining the electrical panel and the connector 3 into one unit, further reducing costs.

[0051] In summary, the housing of this invention is enclosed by upper and lower housings 2 and connecting parts 3. The housing, made of plastic, is lighter, while the connecting parts 3, made of metal, are integrated with the electrical panel. Two sets of through-type multi-segment longitudinal handles 4 are provided along the length of the top of the housing, a horizontal handle 7 is provided on the front side of the housing, and a horizontal pull handle 32 is provided on the top of the rear side of the upper housing 1, thus forming an all-around gripping structure on the body. Two sets of small-diameter and large-diameter rollers are respectively provided on the rear side of the upper and lower housings 2, forming a four-wheel chassis structure on the rear side of the housing. Users can switch between using the four-wheel chassis or the two large-diameter rollers at any time according to road conditions. This invention adopts a stackable structure design, allowing for quick electrical connection by stacking two devices vertically. Through the above-mentioned optimized design, this patent has significant advantages such as simple structure, easy portability, strong mobility, user-friendliness, and low cost, making it very suitable for various portable power supply equipment products and possessing significant technical advantages.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A portable power supply device comprising an electric energy generating means and a casing, characterized in that, The shell comprises an upper shell, a lower shell and a connecting piece between the upper and lower shells, the connecting piece is arranged at the opening of the upper and lower shells, and the connecting piece is connected with the upper and lower shells to form a closed shell electric energy generating device; two handles are arranged on both sides of the top of the upper shell in the width direction, and the handles are arranged longitudinally along the length direction of the shell; a roller device A is arranged on the rear side of the lower shell, and a pull rod device is arranged longitudinally along the length direction of the shell at the bottom of the lower shell, and the pull rod handle of the pull rod device is arranged on the front side of the lower shell; a handle is further arranged transversely on the front side of the shell, the handle is arranged on a handle cover, the top of the handle cover is connected with the upper shell by a fastener, and the bottom of the handle cover is connected with the lower shell by a fastener.

2. The portable power supply device of claim 1, wherein U-shaped lock pieces are arranged at the openings of the upper and lower shells, the openings of the U-shaped lock pieces are clamped on the opening edges of the upper and lower shells, threaded holes are arranged on the U-shaped lock pieces, first connecting holes are arranged on the connecting piece, and screws pass through the first connecting holes to connect the U-shaped lock pieces and connect the connecting piece with the upper and lower shells.

3. The portable power supply device of claim 2, wherein The upper and lower shells are made of plastic material, the connecting piece is made of metal plate material, and the upper edge and / or lower edge of the connecting piece is provided with a reverse folding and flattening reinforcing structure, and the reverse folding and flattening reinforcing structure is provided with two layers of metal plate material to prevent deformation of the plate material.

4. The portable power supply device of claim 1, wherein The left side and the right side of the handle cover are connected with the connecting piece by fasteners, a rotating shaft is arranged on the handle cover, and the handle is rotatably connected with the handle cover by the rotating shaft.

5. The portable power supply device of claim 1, wherein The handle is connected to the top of the upper shell by at least two pressing blocks through fasteners, the pressing blocks have pressing block grooves, the pressing blocks are distributed in the length direction of the handle, the shapes of the pressing block grooves are matched with the shape of the handle, the pressing blocks are arranged outside the handle, and a shell groove is arranged on the upper shell opposite to the pressing blocks, and the handle is fixed between the shell groove and the pressing block groove.

6. A portable power supply device according to claim 5, wherein The pressing blocks are composed of a pressing block metal piece and a pressing block rubber piece attached thereto, the pressing block metal piece has a metal piece groove, first pressing rivets are arranged at both ends of the metal piece groove, the outer side of the root of the first pressing rivets is covered with an outwardly convex pressing block rubber piece, second connecting holes are arranged at both ends of the shell groove, and the first pressing rivets pass through the second connecting holes to fix the handle on the top of the upper shell by a first nut; an inner recess structure is arranged on the top of the upper shell between the two pressing blocks, and the inner recess structure is formed between the handle and the shell to form a space for gripping the handle.

7. The portable power supply device of claim 1, wherein A roller device B is arranged on the rear side of the upper shell, the roller axis of the roller device B is arranged in parallel with the roller axis of the roller device A, the outer diameter d of the roller of the roller device B is smaller, the outer diameter D of the roller of the roller device A is larger, and the size relationship is d 8. The portable power supply device of claim 1, wherein, The bottom of the lower casing is provided with an outwardly convex supporting leg, which is composed of a supporting leg metal piece and a supporting leg rubber piece attached thereto, the supporting leg metal piece is provided with a second rivet screw, the root of the second rivet screw is covered with the outwardly convex supporting leg rubber piece, the supporting leg is connected with the bottom of the lower casing together through the second rivet screw and the second nut on the inner side of the casing; when the two portable power supply devices are stacked up and down, the outwardly convex supporting leg at the bottom of the upper portable power supply device is inserted into the concave structure between the top handle and the casing of the lower portable power supply device to realize positioning.

9. The portable power supply device of claim 1, wherein, The top of the upper casing is provided with a stacking plug, the bottom of the lower casing is provided with a stacking socket, and the stacking plug and the stacking socket are electrically connected with the electric energy generating device; the stacking plug is provided with an outwardly convex limiting column, and the stacking socket is provided with an inwardly concave limiting hole; When the two portable power supply devices are stacked up and down, the limiting column on the stacking plug at the top of the lower portable power supply device is inserted into the limiting hole on the stacking socket at the bottom of the upper portable power supply device to realize positioning, and the conductors on the stacking plug and the socket are in contact to realize the electrical connection of the two devices.

10. The portable power supply device of claim 1, wherein The top of the rear side of the upper casing is provided with a handle transversely, the casing is provided with an air inlet cover and an air outlet cover, the air inlet cover is provided with an air inlet, the air outlet cover is provided with an air outlet, the inner side of the air outlet cover is provided with a cooling fan, and the left and right sides of the lower casing are provided with socket panels provided with sockets; the connecting piece is provided with a control switch, an input interface, an output interface and / or a display screen, and the socket panel, the control switch, the input interface, the output interface and the display screen are electrically connected with the electric energy generating device.

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