Modular capacity expansion device of a shared energy storage station

Abstract

The application discloses a modular expansion device of a shared energy storage station, which comprises a supporting assembly, a limiting assembly, a transmission assembly, an expansion assembly and an energy storage piece. The supporting assembly is formed with a mounting space for accommodating the energy storage piece. The limiting assembly is arranged on the supporting assembly and is used for limiting and fixing the energy storage piece. The expansion assembly is used for circuit connection of variable expansion processing of the energy storage piece. The transmission assembly is connected with the limiting assembly and the expansion assembly respectively, so that the expansion assembly is driven to act when the limiting assembly acts. While the energy storage piece is limited and fixed by the limiting assembly, the expansion assembly can be moved synchronously by the transmission assembly, so that the first plug connector and the second plug connector of the expansion assembly can be inserted into the preset docking interface of the energy storage piece, the circuit connection work during expansion is automatically completed, manual repeated disassembly and assembly of wiring are not needed, the whole expansion adjustment process is simple and convenient to operate, hidden dangers caused by manual wiring errors are avoided, and flexible and variable adjustment of the capacity of the shared energy storage station is realized.

Description

Technical Field

[0001] This invention relates to the field of energy storage equipment technology, specifically to a modular expansion device for a shared energy storage station. Background Technology

[0002] Energy storage is an important means of improving the flexibility of the power system to cope with random fluctuations in power generation and load. With the continuous growth of the installed capacity of new energy power generation and the rapid increase in the number of electric vehicles, the demand for energy storage resources in the power system is becoming increasingly urgent.

[0003] In the actual construction of shared energy storage power stations, the capacity configuration and subsequent expansion of the energy storage system are key issues that urgently need to be addressed. Existing energy storage systems generally adopt a one-time construction model with fixed capacity. Once completed, the capacity is locked and it is difficult to adjust flexibly according to actual needs. The number of batteries in the energy storage battery pack remains unchanged, making it impossible to expand the energy storage capacity. Even if batteries are added or removed later to achieve variable capacity operation, it requires frequent disassembly and reassembly of battery wiring, which is cumbersome and prone to safety hazards due to wiring errors. To address these issues, we propose a modular expansion device for shared energy storage stations. Summary of the Invention

[0004] The purpose of this invention is to provide a modular expansion device for a shared energy storage station to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a modular expansion device for a shared energy storage station, comprising a support component, a limiting component, a transmission component, an expansion component, and an energy storage component; The support assembly forms an installation space for accommodating the energy storage device; The limiting component is mounted on the support component and is used to limit and fix the energy storage device. The expansion component includes a mounting base, a first connecting unit, and a second connecting unit. The top and bottom ends of the mounting base have a first end face and a second end face, respectively. The first end face is fixedly connected to the first connecting unit, and the second end face is fixedly connected to the second connecting unit. The first connecting unit and the second connecting unit are respectively used for the circuit connection of the variable expansion processing of the energy storage device. The transmission component is connected to the limiting component and the expansion component respectively, so as to drive the expansion component to move when the limiting component moves.

[0006] Preferably, the support assembly includes a base, a back plate, and a support column. A plurality of bases are fixedly connected to one end face of the back plate, and a support column is fixedly connected to the top of the side of the plurality of bases away from the back plate. The support columns are respectively disposed between two adjacent bases.

[0007] Preferably, the base has a U-shaped structure, with an opening at the bottom and a first channel at the center of the end of the opening away from the back plate, and a slide rail is fixedly installed inside the opening.

[0008] Preferably, the back plate is provided with a plurality of third channels and second channels respectively, and the third channels are symmetrically arranged for the passage of the energy storage device connector.

[0009] Preferably, the limiting assembly includes a hinge seat, a first connecting rod, a handle, a second connecting rod, a pushing part, a support frame, a screw, and a plate. The hinge seat is fixedly connected to the base, and one end of the first connecting rod is hinged to the hinge seat. The other end of the first connecting rod is fixedly connected to a handle. One end of the second connecting rod is hinged to each side of the middle portion of the first connecting rod. The other end of the second connecting rod is hinged to each side of one end of the pushing part. The pushing part is slidably disposed within the support frame. The support frame is fixedly connected to the base. The middle portion of the other end of the pushing part is connected to one side of the screw via a threaded structure. The other end of the screw is rotatably connected to the plate, and the plate is slidably disposed on the base.

[0010] Preferably, the transmission assembly includes a first connecting part, a first rack, a gear, a support shaft, a second rack, and a second connecting part. One end of the first connecting part is fixedly connected to a plate, and the other end of the first connecting part is fixedly connected to one end of the first rack. The first rack is fixedly connected to the sliding end of a slide rail. The first rack meshes with one side of the gear. The gear is fixedly connected to the support shaft. The support shaft rotatably connects to the inner walls of both sides of the opening. The other side of the gear meshes with the second rack. The end of the second rack away from the gear slides through the second channel, and its end is fixedly connected to the second connecting part. The second connecting part and the mounting base are fixedly installed.

[0011] Preferably, the first connecting part and the first rack, as well as the second rack and the second connecting part, are each L-shaped structures, and the second connecting part has a mounting hole on the side away from the second rack.

[0012] Preferably, the first connecting unit includes a first rod, a first support tube, and a first connector. One end of the first rod is fixedly connected to a first end face, and the other end of the first rod is fixedly connected to a first connector. The first connector is fixedly connected to one end of the first support tube, and the other end of the first support tube is fixedly installed in the mounting base.

[0013] Preferably, the second connecting unit includes a second rod, a second support tube, and a second connector. One end of the second rod is fixedly connected to a second end face, and the other end of the second rod is fixedly connected to the second connector. The second connector is fixedly connected to one end of the second support tube, and the other end of the second support tube is fixedly installed in the mounting base.

[0014] Preferably, the first support tube has an L-shaped structure, the second support tube has an L-shaped structure, the second support tube and the first support tube are interconnected, and the second support tube and the first support tube are provided with wiring at both ends that are electrically connected to the first connector and the second connector respectively.

[0015] Compared with the prior art, the beneficial effects of the present invention are: while limiting and fixing the energy storage component through the limiting component, the expansion component can be moved simultaneously through the transmission component, so that the first and second connectors of the expansion component can be inserted into the preset docking interface of the energy storage component, automatically completing the circuit connection work during expansion, eliminating the need for repeated manual disassembly and wiring, making the entire expansion adjustment process simple and convenient to operate, avoiding the safety hazards caused by manual wiring errors, and realizing the flexible and variable adjustment of the capacity of the shared energy storage station. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the rear structure of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention from a bottom view; Figure 4 This is a top view of the structure of the present invention; Figure 5 This is a schematic diagram of the structure after the topmost energy storage component of the present invention has been removed; Figure 6 This is a schematic diagram of the limiting component, transmission component, and expansion component in this invention; Figure 7 This is a schematic diagram of the limiting component structure in this invention; Figure 8 This is a schematic diagram of the expansion component structure in this invention.

[0017] In the diagram: support assembly 100, base 110, opening 111, slide rail 112, first channel 113, back plate 120, third channel 121, second channel 122, support column 130, limiting assembly 200, hinge seat 210, first connecting rod 220, handle 230, second connecting rod 240, push part 250, support frame 260, screw 270, plate 280, transmission assembly 300, first connecting part 310, first rack 320, gear 330, support shaft 340, second rack 350, second connecting part 360, mounting hole 361, expansion assembly 400, mounting seat 410, first connecting unit 420, first rod 421, first support tube 422, first connector 423, second connecting unit 430, second rod 431, second support tube 432, second connector 433, energy storage component 500. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example: In order to solve the problems of the prior art pointed out in the background, this invention application provides a modular expansion device for a shared energy storage station, including a support component 100, a limiting component 200, a transmission component 300, an expansion component 400, and an energy storage component 500. The support assembly 100 has an installation space for accommodating the energy storage component 500; The limiting component 200 is provided on the support component 100 and is used to limit and fix the energy storage component 500; The expansion component 400 includes a mounting base 410, a first connecting unit 420, and a second connecting unit 430. The top and bottom ends of the mounting base 410 have a first end face and a second end face, respectively. The first end face is fixedly connected to the first connecting unit 420, and the second end face is fixedly connected to the second connecting unit 430. The first connecting unit 420 and the second connecting unit 430 are respectively used for the circuit connection of the variable expansion processing of the energy storage device 500. The transmission component 300 is connected to the limiting component 200 and the expansion component 400 respectively, so as to drive the expansion component 400 to move when the limiting component 200 moves.

[0020] Because of the above-mentioned features, during the capacity expansion process, a new energy storage component 500 is pushed into the installation space formed by the support component 100. Then, the limiting component 200 is manually operated to limit and fix the position of the energy storage component 500. Compared with the traditional bolt fixing method, the fixing method of the limiting component 200 is more convenient and faster. The installer does not need to frequently tighten the bolts to achieve variable capacity operation, avoiding the wear and stripping problems of traditional bolt fixing, and improving the durability and repeatability of the capacity expansion operation. At the same time as the limiting component 200 moves, the expansion component 400 is synchronously driven to move in the opposite direction through the transmission component 300, so that the first connecting unit 420 of the expansion component 400 and the electrode (such as the positive electrode) plug of the newly installed energy storage component 500 are connected to complete the electrical connection. The second connecting unit... The electrode (such as the negative electrode) plug of the energy storage device 430, which is located at the end before expansion, is plugged in to complete the electrical connection and realize the series connection of the energy storage battery pack, thereby completing the capacity expansion process of the energy storage battery pack. When reducing the capacity of the energy storage device, the limit component 200 is released to take out the corresponding energy storage device 500. The limit component 200 simultaneously drives the expansion component 400 to move, so that the first connection unit 420 and the second connection unit 430 of the expansion component 400 are disconnected from the electrical connection with the energy storage device 500, completing the capacity reduction operation. The whole process does not require manual disassembly and reassembly of the wiring of the energy storage device. The circuit connection can be completed by simply fixing the energy storage device 500. The operation process is simple and effectively avoids the safety hazards caused by wiring errors. It realizes the flexible and modular adjustment of the energy storage capacity of the shared energy storage station to adapt to the actual power storage needs of different periods.

[0021] The following describes in detail the specific implementation methods for achieving the above-mentioned technical features and the effects that can be further produced.

[0022] In one specific embodiment, the support assembly 100 includes a base 110, a back plate 120, and a support column 130. A plurality of bases 110 are fixedly connected to one end face of the back plate 120. An installation space for accommodating the energy storage device 500 is formed between two adjacent bases 110. The top ends of the multiple bases 110 away from the back plate 120 are respectively fixedly connected to the support column 130. The support column 130 is respectively disposed between two adjacent bases 110. The support column 130 is used to support the two adjacent bases 110, thereby improving the stability of the base 110.

[0023] In one specific embodiment, the base 110 has a U-shaped structure, allowing the energy storage component 500 to be inserted into the U-shaped structure of the base 110 for initial positioning. The bottom of the base 110 has an opening 111, which provides space for the installation and transmission operation of the transmission component 300. At the same time, the opening 111 also improves the heat dissipation effect of the energy storage component 500 and enhances airflow. A first channel 113 is provided in the middle of the end of the opening 111 away from the back plate 120. A slide rail 112 is fixedly installed in the opening 111, and the slide rail 112 provides stable support for the linear movement of the transmission component 300.

[0024] In one specific implementation, the back plate 120 is provided with a plurality of third channels 121 and second channels 122 respectively. The third channels 121 are symmetrically arranged and are used for the passage of the energy storage component 500 connector. The support assembly 100 is installed inside the outer shell of the energy storage station, and the outer shell protects the whole.

[0025] In one specific embodiment, the limiting component 200 includes a hinge seat 210, a first connecting rod 220, a handle 230, a second connecting rod 240, a pushing part 250, a support frame 260, a screw 270, and a plate 280. The hinge seat 210 is fixedly connected to the base 110. The hinge seat 210 is hinged to one end of the first connecting rod 220. The other end of the first connecting rod 220 is fixedly connected to the handle 230. The middle two sides of the first connecting rod 220 are respectively hinged to one end of the second connecting rod 240. The other end of the second connecting rod 240 is respectively hinged to one side of the pushing part 250. The pushing part 250 is slidably disposed in the support frame 260. The support frame 260 is fixedly connected to the base 110. The middle part of the other end of the pushing part 250 is connected to one side of the screw 270 through a threaded structure. The other end of the screw 270 is rotatably connected to the plate 280. The plate 280 is slidably disposed on the base 110.

[0026] When expansion is required, a new energy storage unit 500 is placed in the space between two adjacent bases 110. The bases 110 support the energy storage unit 500. Then, the handle 230 is manually operated and pushed towards the energy storage unit 500. The handle 230 drives the fixed first connecting rod 220 to swing around the hinge seat 210. The first connecting rod 220 drives the second connecting rods 240 hinged on both sides to push the pushing part 250 to slide along the support frame 260 towards the energy storage unit 500. The pushing part 250 drives the screw 270 and the plate. 280 moves synchronously. After the plate 280 contacts the end face of the energy storage component 500, it works with the back plate 120 to press the energy storage component 500 against the base 110, thus completing the limiting and fixing of the energy storage component. During the capacity reduction operation, the handle 230 is operated in the opposite direction, and the various components work together to allow the plate 280 to disengage from the limiting of the energy storage component 500 and be removed. Rotating the screw 270 can also finely adjust the extension position of the plate 280 along the thread structure of the push part 250 to adapt to energy storage components 500 of different thicknesses, ensuring the stability of the fixation and preventing the energy storage component from shaking.

[0027] In one specific embodiment, the transmission assembly 300 includes a first connecting part 310, a first rack 320, a gear 330, a support shaft 340, a second rack 350, and a second connecting part 360. One end of the first connecting part 310 is fixedly connected to the plate 280, and the other end of the first connecting part 310 is fixedly connected to one end of the first rack 320. The first rack 320 is fixedly connected to the sliding end of the slide rail 112. The first rack 320 meshes with one side of the gear 330. The gear 330 is fixedly connected to the support shaft 340. The support shaft 340 is rotatably connected to the inner walls of both sides of the opening 111. The other side of the gear 330 meshes with the second rack 350. The end of the second rack 350 away from the gear 330 slides through the second channel 122, and its end is fixedly connected to the second connecting part 360. The second connecting part 360 and the mounting base 410 are fixedly installed.

[0028] During the expansion process, when the plate 280 of the limiting component 200 moves toward the energy storage component 500, the plate 280 drives the fixed first connecting part 310 to move synchronously. The first connecting part 310 drives the first rack 320 to slide along the slide rail 112 toward the back plate 120. The first rack 320 drives the meshing gear 330 to rotate around the support shaft 340. After the gear 330 rotates, it drives the meshing second rack 350 on the other side to slide in the opposite direction. The second rack 350 slides along the second channel 122 toward the direction close to the back plate 120, thereby driving the second connecting part 360 connected at the end to move synchronously. The second connecting part 360 drives the expansion component 400 to move toward the corresponding energy storage component 500, realizing the automatic docking of the expansion component 400 and the energy storage component 500. When the capacity reduction operation is performed, the plate 280 moves in the opposite direction, which in turn drives the expansion component 400 to move in the opposite direction, automatically disengaging from the docking with the energy storage component 500.

[0029] In one specific embodiment, the first connecting part 310, the first rack 320, the second rack 350, and the second connecting part 360 are all L-shaped structures. During the shrinkage operation, the first connecting part 310 can retract into the first channel 113, increasing the moving distance of the first connecting part 310. The second connecting part 360 has a mounting hole 361 on the side away from the second rack 350. Through the setting of the mounting hole 361, the expansion component 400 can be fixedly installed with fasteners, which facilitates the disassembly and assembly of the expansion component 400.

[0030] In one specific embodiment, the first connecting unit 420 includes a first rod 421, a first support tube 422, and a first connector 423. One end of the first rod 421 is fixedly connected to a first end face, and the other end of the first rod 421 is fixedly connected to the first connector 423. The first connector 423 is fixedly connected to one end of the first support tube 422, and the other end of the first support tube 422 is fixedly installed in the mounting base 410. The first support tube 422 has an L-shaped structure.

[0031] The first rod 421 and the first support tube 422 of the L-shaped structure cooperate to form a right-angled triangle structure, which improves the stress stability of the first connector 423, avoids the first connector 423 from being misaligned when it is connected, and ensures accurate connection position.

[0032] In one specific embodiment, the second connecting unit 430 includes a second rod 431, a second support tube 432, and a second connector 433. One end of the second rod 431 is fixedly connected to a second end face, and the other end of the second rod 431 is fixedly connected to the second connector 433. The second connector 433 is fixedly connected to one end of the second support tube 432, and the other end of the second support tube 432 is fixedly installed in the mounting base 410. The second support tube 432 has an L-shaped structure, and the second support tube 432 and the first support tube 422 are interconnected. The second support tube 432 and the first support tube 422 are provided with wiring terminals that are electrically connected to the first connector 423 and the second connector 433, respectively.

[0033] The second rod 431 and the L-shaped second support tube 432 cooperate to form a right-angled triangle structure, which improves the stress stability of the second connector 433, avoids the second connector 433 from being misaligned when connected, and ensures accurate insertion position. The second support tube 432 and the first support tube 422 are provided with wiring at both ends that are electrically connected to the first connector 423 and the second connector 433 respectively. The circuit of the first connector 423 and the second connector 433 is connected through the wiring, so that the first connector 423 and the second connector 433 are electrically connected to the two energy storage devices 500 that need to be connected in series, and the series operation of the two energy storage devices 500 is realized.

[0034] The working principle and process are as follows: The support assembly 100 is installed inside the outer shell of the energy storage station, which protects the entire unit. When expansion is required, a new energy storage component 500 is placed in the space between two adjacent bases 110. The bases 110 support the energy storage component 500. Then, the handle 230 is manually operated and pushed towards the energy storage component 500. The handle 230 drives the fixed first connecting rod 220 to swing around the hinge seat 210. The first connecting rod 220 drives the hinged second connecting rods 240 on both sides to push the pushing part 250 to slide along the support frame 260 towards the energy storage component 500. The pushing part 250 drives the screw 270 and the plate 280 to move synchronously. After the plate 280 contacts the end face of the energy storage component 500, it cooperates with the back plate 120 to press the energy storage component 500 against the base 110, completing the limiting and fixing of the energy storage component 500. At the same time, the plate 280 drives the fixed first connecting part 310 to move synchronously. Step by step, the first connecting part 310 drives the first rack 320 to slide along the slide rail 112 toward the back plate 120. The first rack 320 drives the meshing gear 330 to rotate around the support shaft 340. After the gear 330 rotates, it drives the second rack 350 meshing on the other side to slide in the opposite direction. The second rack 350 slides along the second channel 122 toward the direction close to the back plate 120, thereby driving the second connecting part 360 connected at the end to move synchronously. The second connecting part 360 drives the mounting base 410 to move synchronously. The mounting base 410 then drives the first connecting unit 420 and the second connecting unit 430 to move synchronously. The first connector 423 of the first connecting unit 420 is plugged into the electrode (such as the positive electrode) of the newly installed energy storage device 500. At the same time, the second connector 433 of the second connecting unit 430 is plugged into the electrode (such as the negative electrode) of the original energy storage device 500, realizing the overall series operation. During the capacity reduction operation, the handle 230 is reversed, and the various components work together to allow the plate 280 to be removed from the limiting position of the energy storage unit 500. At the same time, the transmission component 300 drives the expansion component 400 to move in the opposite direction, causing the first connector 423 and the second connector 433 to disengage from the two series-connected energy storage units 500, thus disconnecting the wiring. Finally, the externally reserved conductive connector is plugged into the plug of the remaining energy storage unit 500 to ensure the normal connection of the original energy storage circuit. The entire process does not require additional disassembly and wiring, making the operation simple and safe, and enabling flexible capacity adjustment.

[0035] It should be noted that the above-mentioned electrical and mechanical components are all existing technology products. They are selected, installed and debugged by those skilled in the art according to the needs of use to ensure that all electrical appliances can work normally. The components are all general standard parts or components known to those skilled in the art. Their structure and principle can be known by those skilled in the art through technical manuals or conventional experimental methods. The applicant does not impose specific restrictions here, so it will not be described in detail.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular expansion device for a shared energy storage station, characterized in that, include: A support assembly (100) is formed with an installation space for accommodating an energy storage device (500); A limiting component (200) is provided on the support component (100) for limiting and fixing the energy storage component (500); The expansion component (400) includes a mounting base (410), a first connecting unit (420), and a second connecting unit (430). The mounting base (410) has a first end face and a second end face at its top and bottom ends, respectively. The first end face is fixedly connected to the first connecting unit (420), and the second end face is fixedly connected to the second connecting unit (430). The first connecting unit (420) and the second connecting unit (430) are respectively used for the circuit connection of the variable expansion processing of the energy storage device (500). A transmission assembly (300) is connected to a limiting assembly (200) and an expansion assembly (400) respectively, so as to drive the expansion assembly (400) to move when the limiting assembly (200) moves.

2. The modular expansion device for a shared energy storage station according to claim 1, characterized in that: The support assembly (100) includes a base (110), a back plate (120), and a support column (130). A plurality of bases (110) are fixedly connected to one end face of the back plate (120). The top of the side of the plurality of bases (110) away from the back plate (120) is fixedly connected to a support column (130). The support column (130) is respectively located between two adjacent bases (110).

3. A modular expansion device for a shared energy storage station according to claim 2, characterized in that: The base (110) has a U-shaped structure. An opening (111) is provided at the bottom of the base (110). A first channel (113) is provided at the middle of the end of the opening (111) away from the back plate (120). A slide rail (112) is fixedly installed in the opening (111).

4. A modular expansion device for a shared energy storage station according to claim 3, characterized in that: The back plate (120) is provided with a plurality of third channels (121) and second channels (122). The third channels (121) are symmetrically arranged and are used for the passage of the energy storage device (500) connector.

5. A modular expansion device for a shared energy storage station according to claim 4, characterized in that: The limiting component (200) includes a hinge seat (210), a first connecting rod (220), a handle (230), a second connecting rod (240), a pushing part (250), a support frame (260), a screw (270), and a plate (280). The hinge seat (210) is fixedly connected to the base (110). The hinge seat (210) is hinged to one end of the first connecting rod (220). The other end of the first connecting rod (220) is fixedly connected to the handle (230). The middle part of the first connecting rod (220) is divided into two sides. One end of the second connecting rod (240) is hinged, and the other end of the second connecting rod (240) is hinged to both sides of one end of the push part (250). The push part (250) is slidably disposed in the support frame (260). The support frame (260) is fixedly connected to the base (110). The middle part of the other end of the push part (250) is connected to one side of the screw rod (270) through a threaded structure. The other end of the screw rod (270) is rotatably connected to the plate (280). The plate (280) is slidably disposed on the base (110).

6. A modular expansion device for a shared energy storage station according to claim 5, characterized in that: The transmission assembly (300) includes a first connecting part (310), a first rack (320), a gear (330), a support shaft (340), a second rack (350), and a second connecting part (360). One end of the first connecting part (310) is fixedly connected to a plate (280), and the other end of the first connecting part (310) is fixedly connected to one end of the first rack (320). The first rack (320) is fixedly connected to the sliding end of a slide rail (112). On one side of the meshing connecting gear (330), the gear (330) is fixedly connected to the support shaft (340), the support shaft (340) is rotatably connected to the inner walls of both sides of the opening (111), and on the other side of the gear (330) meshes with the second rack (350). The end of the second rack (350) away from the gear (330) slides through the second channel (122), and its end is fixedly connected to the second connecting part (360). The second connecting part (360) and the mounting base (410) are fixedly installed.

7. A modular expansion device for a shared energy storage station according to claim 6, characterized in that: The first connecting part (310), the first rack (320), the second rack (350), and the second connecting part (360) are all L-shaped structures. The second connecting part (360) has a mounting hole (361) on the side away from the second rack (350).

8. A modular expansion device for a shared energy storage station according to claim 1, characterized in that: The first connecting unit (420) includes a first rod (421), a first support tube (422), and a first connector (423). One end of the first rod (421) is fixedly connected to a first end face, and the other end of the first rod (421) is fixedly connected to the first connector (423). The first connector (423) is fixedly connected to one end of the first support tube (422), and the other end of the first support tube (422) is fixedly installed in the mounting base (410).

9. A modular expansion device for a shared energy storage station according to claim 8, characterized in that: The second connecting unit (430) includes a second rod (431), a second support tube (432), and a second connector (433). One end of the second rod (431) is fixedly connected to the second end face, and the other end of the second rod (431) is fixedly connected to the second connector (433). The second connector (433) is fixedly connected to one end of the second support tube (432), and the other end of the second support tube (432) is fixedly installed in the mounting base (410).

10. A modular expansion device for a shared energy storage station according to claim 9, characterized in that: The first support tube (422) is an L-shaped structure, the second support tube (433) is an L-shaped structure, the second support tube (432) and the first support tube (422) are interconnected, and the second support tube (432) and the first support tube (422) are provided with wiring at both ends that are electrically connected to the first connector (423) and the second connector (433) respectively.

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