Modular energy storage device for grid connection

Abstract

The invention belongs to the field of energy storage, and particularly relates to a modularized energy storage device for grid connection, which comprises a cabinet body and an energy storage unit, a stand column is vertically arranged in the cabinet body, the outer surface of the stand column is respectively matched with a movable sleeve I and a movable sleeve II from top to bottom, and five axial fixing parts are arranged on the outer surface of the movable sleeve I; the axial fixing part comprises an elbow rod and two right-angle pressing plates, an I-shaped plate is arranged at the bottom of one end of the elbow rod, four through holes are formed in the I-shaped plate, two fixing rods are arranged at the tops of the right-angle pressing plates, first springs are matched with the outer surfaces of the fixing rods, and the outer surfaces of the top ends of the fixing rods are matched with the through holes. Five stabilizing pieces are arranged on the outer surface of the movable sleeve II; by means of the structural design of the stand columns, the axial fixing pieces and the stabilizing pieces, the multiple energy storage units are evenly distributed and fixed in the cabinet body in an annular array mode, it is effectively guaranteed that enough heat dissipation gaps exist between every two adjacent energy storage units, and the heat dissipation rate of the energy storage units during operation is increased.

Description

Technical Field

[0001] This invention relates to the field of energy storage, specifically a modular energy storage device for grid connection. Background Technology

[0002] Grid connection, or parallel connection to the power grid, refers to connecting power equipment or systems such as generator sets, distributed power sources, and energy storage devices to the public power grid through specific interfaces and protocols, enabling them to exchange energy with the grid. Among these, modular energy storage devices, with their flexibility, scalability, and ease of maintenance, are becoming an important development direction in the energy storage market. They can effectively address the challenges of various application scenarios such as renewable energy grid connection, grid peak shaving, and distributed energy. The technology is also constantly evolving towards larger capacity, higher security, and intelligence. Therefore, China has authorized a utility model patent (publication number: CN221962082U) that provides a modular energy storage device. This device uses a cover plate connected to the surface of the outer shell via a rotating shaft. A protective cover is provided outside the wiring port. A spring is fixedly connected to the surface of the protective cover, and a rectangular plate is fixedly connected to the top of the cover plate. The other end of the spring is embedded inside the rectangular plate. The protective cover is symmetrically distributed. In use, the protective cover is first pulled open to both sides, then the pipeline can be connected to the inside of the wiring port. Then the protective cover is released, at which point it will cover the outside of the wiring port, preventing water droplets from seeping into the device and improving waterproofing.

[0003] However, this energy storage device places multiple energy storage modules side by side inside the casing. The adjacent energy storage modules are close together, and during operation, the heat generated circulates between adjacent energy storage modules, making it difficult to quickly release the heat between the energy storage modules. As a result, the heat dissipation effect of the device is reduced, affecting the normal operation of the energy storage modules. Therefore, a modular energy storage device for grid connection is proposed to address the above problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, such as the difficulty in quickly releasing heat between adjacent energy storage modules due to their close proximity, this invention proposes a modular energy storage device for grid connection.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: a modular energy storage device for grid connection, comprising a cabinet and energy storage units. A column is vertically installed inside the cabinet. From top to bottom, the outer surface of the column is fitted with movable sleeve one and movable sleeve two, respectively. The outer surface of movable sleeve one is provided with five axial fixing members, each including an elbow rod and two right-angle pressure plates. One end of the elbow rod has an I-shaped plate with four through holes. The top of the right-angle pressure plates has two fixing rods, the outer surface of which is fitted with a spring. The top outer surface of the fixing rod engages with the through holes. The outer surface of movable sleeve two is provided with five stabilizing springs. The stabilizing component includes a base plate with a receiving groove. A rectangular groove is formed at one end of the base plate, and a through groove is formed inside the rectangular groove, which communicates with the interior of the receiving groove. A crossbar is fitted inside the receiving groove, and a spring is fitted on the surface of the crossbar. A slip ring is fitted on one end of the crossbar, and one end of the crossbar fits into the through groove. One end of the crossbar passes through the through groove into the rectangular groove, and a pull rope is connected to one end of the crossbar. One end of the pull rope is connected to the outer surface of the movable sleeve. Five pulleys are provided on the bottom surface of the column, and the pull rope is wound around the inner surface of the pulleys. The slip ring fits into the receiving groove, and a movable clamping plate is provided on the top of the slip ring. A stationary clamping plate is provided on one end surface of the base plate.

[0006] Preferably, the top of the column is provided with an assembly groove, and a bidirectional screw is rotatably installed on the bottom inner wall of the assembly groove. Two drive blocks are fitted on the outer surface of the bidirectional screw, and a pair of guide blocks are provided on the outer surface of the drive blocks.

[0007] Preferably, the surface of the column has two guide grooves that are connected to the interior of the assembly groove. The guide blocks cooperate with the guide grooves, and one end of each pair of guide blocks passes through the guide grooves and is connected to the inner rings of movable sleeve one and movable sleeve two, respectively. A motor is installed at the top of the column, and the output end of the motor is connected to the top of the bidirectional screw.

[0008] Preferably, the end of the elbow rod away from the "I"-shaped plate is connected to the outer surface of the movable sleeve 2, and a limit piece is provided at the top of the fixed rod.

[0009] Preferably, the bottom of the movable clamping plate is provided with two sliders, and the surface of the base plate is provided with two grooves. The sliders cooperate with the grooves, and the outer surface of the movable sleeve is provided with five fixing rings. One end of the pull rope is connected to the fixing rings.

[0010] Preferably, five energy storage units are provided, and the energy storage units are disposed between the axial fixing member and the stabilizing member.

[0011] Preferably, a turntable is provided at the bottom of the column, the base plate is placed on the turntable, a circular groove is opened at the bottom of the cabinet body, the turntable cooperates with the circular groove, and a shaft is rotatably fitted at the center of the bottom inner wall of the circular groove, the top of the shaft is connected to the bottom of the turntable.

[0012] As a preferred option, the cabinet has two hinged doors with handles, both side panels have ventilation grilles, and the bottom has four rubber pads.

[0013] The advantages of this invention are:

[0014] 1. This invention, through the structural design of a column, axial fixing component, and stabilizing component, utilizes a bidirectional screw rotating within an assembly slot. This causes the two movable sleeves (one and two) to slide towards each other on the outer surface of the column. This allows the two right-angle pressure plates on the axial fixing component to contact and compress the top side of the energy storage unit, thus axially fixing the five energy storage units. This allows the five energy storage units to be evenly distributed and fixed in a ring array around the column, effectively ensuring sufficient heat dissipation gaps between adjacent energy storage units. This accelerates the heat dissipation rate during operation, improves the device's heat dissipation effect, and guarantees the normal operation of the energy storage units.

[0015] 2. This invention, through the structural design of the stabilizing component, causes the pull rope to roll and rub against the inner surface of the pulley after the upward movement of the movable sleeve two. This causes the pull rope to slide horizontally across the crossbar within the through groove, resulting in the inner surface of the movable clamping plate contacting and compressing the bottom surface of the energy storage unit. The rebound force generated by the compression of the second spring ensures that the movable clamping plate and the bottom side of the energy storage unit are tightly fitted together, thus stably restricting and fixing the energy storage unit between the movable and stationary clamping plates. This enhances the radial stability of the energy storage unit, ensuring its stable fixation between the axial fixing component and the stabilizing component. It also facilitates the rapid disassembly and maintenance of the energy storage unit, guaranteeing its maintenance efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the assembly structure of the energy storage device;

[0018] Figure 2 This is a schematic diagram of the energy storage device.

[0019] Figure 3 This is a schematic diagram of the internal structure of an energy storage device;

[0020] Figure 4 This is a schematic diagram of the installation structure of the column;

[0021] Figure 5 This is a schematic diagram of the installation structure of the axial fixing component;

[0022] Figure 6 This is a schematic diagram of the installation structure of the movable sleeve 2 and the stabilizing component;

[0023] Figure 7 A schematic diagram of the mounting structure for the stabilizer;

[0024] Figure 8 This is a structural schematic diagram of the base plate;

[0025] Figure 9 This is a schematic diagram of the installation structure of the column.

[0026] In the diagram: 1. Cabinet body; 101. Circular groove; 102. Shaft; 103. Cabinet door; 2. Column; 201. Assembly groove; 202. Guide groove; 203. Turntable; 3. Movable sleeve one; 4. Movable sleeve two; 5. Axial fixing component; 501. Elbow rod; 502. I-shaped plate; 5021. Through hole; 503. Fixing rod; 504. Spring one; 505. Right angle pressure plate; 6. Stabilizing component; 601. Base plate; 6011. Receiving groove; 6012. Rectangular groove; 6013. Through groove; 602. Crossbar; 603. Slip ring; 604. Spring two; 605. Moving clamp plate; 606. Stationary clamp plate; 607. Pull rope; 608. Pulley; 609. Fixing ring; 7. Bidirectional screw; 701. Drive block; 8. Motor; 9. Energy storage unit. Detailed Implementation

[0027] 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.

[0028] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0029] This application discloses a modular energy storage device for grid connection. (Refer to...) Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 7 A modular energy storage device for grid connection includes a cabinet 1 and an energy storage unit 9. A column 2 is vertically installed inside the cabinet 1. The outer surface of the column 2 is fitted with a movable sleeve 3 and a movable sleeve 4 from top to bottom. The energy storage unit 9 is a high-energy-density lithium iron phosphate battery, which ensures cycle life and safety.

[0030] The outer surface of the movable sleeve 3 is provided with five axial fixing parts 5. The axial fixing parts 5 include elbow rods 501 and two right-angle pressure plates 505. One end of the elbow rod 501 is provided with an "I" shaped plate 502. The "I" shaped plate 502 has four through holes 5021. The top of the right-angle pressure plate 505 is provided with two fixing rods 503. The outer surface of the fixing rod 503 is fitted with a spring 504. The top outer surface of the fixing rod 503 is fitted with the through hole 5021.

[0031] The outer surface of the movable sleeve 2 4 is provided with five stabilizing components 6. Each stabilizing component 6 includes a base plate 601, on which a receiving groove 6011 is formed. A rectangular groove 6012 is formed at one end of the base plate 601, and a through groove 6013 is formed within the rectangular groove 6012. The through groove 6013 communicates with the interior of the receiving groove 6011. A crossbar 602 is fitted within the receiving groove 6011. A spring 2 604 is fitted onto the surface of the crossbar 602. A slip ring 603 is fitted onto one end of the crossbar 602. The end surface mates with the through groove 6013. One end of the crossbar 602 passes through the through groove 6013 into the rectangular groove 6012. One end of the crossbar 602 is connected to a pull rope 607. One end of the pull rope 607 is connected to the outer surface of the movable sleeve 4. Five pulleys 608 are provided on the bottom surface of the column 2. The pull rope 607 is wound around the inner surface of the pulleys 608. The slip ring 603 mates with the receiving groove 6011. A movable clamping plate 605 is provided on the top of the slip ring 603. A stationary clamping plate 606 is provided on one end surface of the base plate 601.

[0032] Reference Figure 4 and Figure 9 The top of the column 2 is provided with an assembly groove 201. A bidirectional screw 7 is rotatably installed on the bottom inner wall of the assembly groove 201. A bearing is embedded in the bottom inner wall of the assembly groove 201. The bottom outer surface of the bidirectional screw 7 mates with the inner ring of the bearing, which can ensure the rotation effect of the bidirectional screw 7 in the assembly groove 201. Two drive blocks 701 are fitted on the outer surface of the bidirectional screw 7. A pair of guide blocks are provided on the outer surface of the drive blocks 701. Two guide grooves 202 are provided on the surface of the column 2. The guide grooves 202 are connected to the interior of the assembly groove 201. The guide blocks mate with the guide grooves 202. One end of the two pairs of guide blocks passes through the guide grooves 202 and is connected to the inner ring of the movable sleeve 3 and the movable sleeve 4 respectively. A motor 8 is provided at the top of the column 2. The output end of the motor 8 is connected to the top of the bidirectional screw 7.

[0033] Reference Figure 4 and Figure 5 The end of the elbow rod 501 away from the "I"-shaped plate 502 is connected to the outer surface of the movable sleeve 4, which facilitates the installation of the axial fixing part 5. The top of the fixing rod 503 is provided with a limit piece to prevent the fixing rod 503 from sliding out of the through hole 5021.

[0034] Reference Figure 6 and Figure 7 The bottom of the movable clamping plate 605 is provided with two sliders, and the surface of the base plate 601 is provided with two grooves. The sliders cooperate with the grooves to ensure the stability of the movable clamping plate 605 sliding on the surface of the base plate 601. The outer surface of the movable sleeve 2 4 is provided with five fixing rings 609. One end of the pull rope 607 is connected to the fixing rings 609, which can facilitate the connection between the pull rope 607 and the surface of the movable sleeve 2 4.

[0035] Reference Figure 1 , Figure 3 and Figure 4 The energy storage unit 9 is provided in five parts. The energy storage unit 9 is arranged between the axial fixing member 5 and the stabilizing member 6, which can realize the ring-shaped fixed arrangement of the five energy storage units 9, increase the gap between adjacent energy storage units 9, and improve the heat dissipation efficiency of the energy storage unit 9.

[0036] Reference Figure 1 and Figure 3 A turntable 203 is provided at the bottom of the column 2, and a base plate 601 is placed on the turntable 203. A circular groove 101 is opened at the bottom of the cabinet 1. The turntable 203 cooperates with the circular groove 101, and there is friction between the turntable 203 and the circular groove 101, which can facilitate the rotation and locking of the turntable 203. A shaft 102 is rotatably fitted at the center of the bottom inner wall of the circular groove 101. The top of the shaft 102 is connected to the bottom of the turntable 203, which can realize the rotation of the column 2, and facilitate the sequential fixing of five energy storage units 9 between the corresponding axial fixing parts 5 and stabilizing parts 6.

[0037] Reference Figure 1 and Figure 2 The cabinet 1 has two hinged doors 103 with handles for easy maintenance of the cabinet 1. Both side panels of the cabinet 1 are equipped with heat dissipation mesh to facilitate the dissipation of heat from the cabinet 1. The bottom of the cabinet 1 is equipped with four rubber pads to ensure stable placement of the device.

[0038] Working principle: In use, five energy storage units 9 are stably placed on the corresponding five base plates 601, with one side of the bottom of the energy storage unit 9 abutting against the stationary clamping plate 606. Then, the output end of the motor 8 is controlled by the external PLC controller to drive the bidirectional screw 7 to rotate in the assembly groove 201, so that the two driving blocks 701 on the outer surface of the bidirectional screw 7 slide towards each other in the assembly groove 201, thereby driving the movable sleeve 1 3 and movable sleeve 2 4 to slide towards each other on the outer surface of the column 2. As the movable sleeve 1 3 and movable sleeve 2 4 approach each other, the movable sleeve 1 3 causes the five axial fixing parts 5 on its outer surface to move down, so that the two right-angle pressure plates 505 on the axial fixing parts 5 contact the top side of the energy storage unit 9 and generate pressure, so that the two fixing rods on the right-angle pressure plates 505 503 slides within the corresponding through hole 5021, causing spring 504 to be compressed and contracted between the "I" shaped plate 502 and the right-angle pressure plate 505. The rebound force generated by the compression of spring 504 causes the two right-angle pressure plates 505 on the five axial fixing parts 5 to fit tightly against the top of the five energy storage units 9, thereby achieving axial fixation of the five energy storage units 9. This allows the five energy storage units 9 to be evenly distributed and fixed in a ring array around the periphery of the column 2, thus enabling multiple energy storage units 9 to be evenly distributed and fixed in a ring array within the cabinet 1. This effectively ensures sufficient heat dissipation gap between adjacent energy storage units 9, accelerates the heat dissipation rate of the energy storage units 9 during operation, improves the heat dissipation effect of the device, and ensures the normal operation of the energy storage units 9.As the bidirectional screw 7 drives the movable sleeve 1 3 and movable sleeve 2 4 to approach each other, as movable sleeve 1 3 moves downward on the surface of column 2, movable sleeve 2 4 slides upward on the surface of column 2. This upward movement of movable sleeve 2 4 causes it to pull the five ropes 607 upward through the five fixed rings 609. The ropes 607, subjected to upward traction, experience rolling friction with the inner surface of pulley 608, causing the traction force to pull the crossbar 602 horizontally through pulley 608, sliding it within the through groove 6013. This allows the crossbar 602 to slide within the receiving groove 6011, causing it to pass through the through groove 6013 and move horizontally into the rectangular groove 6012. This causes the movable clamp 605 to gradually approach the bottom side of the energy storage unit 9. As the crossbar 602 moves horizontally, the movable clamp... The inner surface of plate 605 contacts and presses against the bottom surface of energy storage unit 9. The reaction force generated by the moving clamp 605 pressing against energy storage unit 9 causes slip ring 603 to press against spring 604, compressing spring 604 on the surface of crossbar 602 until motor 8 stops driving bidirectional screw 7 to rotate. At this time, the rebound force generated by the compression of spring 604 makes the moving clamp 605 fit tightly against the bottom side of energy storage unit 9, so that energy storage unit 9 is stably restricted and fixed between moving clamp 605 and stationary clamp 606, thereby enhancing the radial stability of energy storage unit 9. This ensures that energy storage unit 9 is stably fixed between axial fixing member 5 and stabilizing member 6, and also facilitates quick disassembly and maintenance of energy storage unit 9, ensuring maintenance efficiency of energy storage unit 9.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A modular energy storage device for grid connection, comprising a cabinet (1), characterized in that: The cabinet (1) is vertically provided with a column (2), and the outer surface of the column (2) is fitted with a movable sleeve one (3) and a movable sleeve two (4) from top to bottom respectively; The outer surface of the movable sleeve (3) is provided with five axial fixing parts (5). The axial fixing parts (5) include an elbow rod (501) and two right-angle pressure plates (505). One end of the elbow rod (501) is provided with an "I" shaped plate (502). The "I" shaped plate (502) has four through holes (5021). The top of the right-angle pressure plate (505) is provided with two fixing rods (503). The outer surface of the fixing rod (503) is fitted with a spring (504). The top outer surface of the fixing rod (503) is fitted with the through hole (5021). The outer surface of the movable sleeve 2 (4) is provided with five stabilizing components (6). Each stabilizing component (6) includes a base plate (601). The base plate (601) has a receiving groove (6011). A rectangular groove (6012) is formed at the bottom of one end of the base plate (601). A through groove (6013) is formed in the rectangular groove (6012). The through groove (6013) communicates with the interior of the receiving groove (6011). A crossbar (602) is fitted in the receiving groove (6011). A spring 2 (604) is fitted on the surface of the crossbar (602). A slip ring (603) is fitted on the surface of one end of the crossbar (602). One end of the crossbar (602) is fitted with the through groove (6013), and one end of the crossbar (602) passes through the through groove (6013) into the rectangular groove (6012). One end of the crossbar (602) is connected to a pull rope (607), and one end of the pull rope (607) is connected to the outer surface of the movable sleeve (4). Five pulleys (608) are provided on the bottom surface of the column (2). The pull rope (607) is wound around the inner surface of the pulleys (608). The slip ring (603) is fitted with the receiving groove (6011). A movable clamping plate (605) is provided on the top of the slip ring (603). A stationary clamping plate (606) is provided on one end surface of the base plate (601).

2. A modular energy storage device for grid connection according to claim 1, characterized in that: The top of the column (2) is provided with an assembly groove (201), and a bidirectional screw (7) is rotatably installed on the bottom inner wall of the assembly groove (201). Two driving blocks (701) are fitted on the outer surface of the bidirectional screw (7), and a pair of guide blocks are provided on the outer surface of the driving blocks (701).

3. A modular energy storage device for grid connection according to claim 2, characterized in that: The surface of the column (2) has two guide grooves (202), which are connected to the interior of the assembly groove (201). The guide block cooperates with the guide groove (202). One end of the two pairs of guide blocks passes through the guide groove (202) and is connected to the inner ring of the movable sleeve one (3) and movable sleeve two (4) respectively. The top of the column (2) is equipped with a motor (8), and the output end of the motor (8) is connected to the top end of the bidirectional screw (7).

4. A modular energy storage device for grid connection according to claim 1, characterized in that: The end of the elbow rod (501) away from the "I"-shaped plate (502) is connected to the outer surface of the movable sleeve (4), and the top of the fixed rod (503) is provided with a limiting piece.

5. A modular energy storage device for grid connection according to claim 1, characterized in that: The bottom of the movable clamp (605) is provided with two sliders, and the surface of the base plate (601) is provided with two grooves. The sliders cooperate with the grooves. The outer surface of the movable sleeve (4) is provided with five fixing rings (609). One end of the pull rope (607) is connected to the fixing rings (609).

6. A modular energy storage device for grid connection according to claim 5, characterized in that: It also includes an energy storage unit (9), of which five are provided, and the energy storage unit (9) is disposed between the axial fixing member (5) and the stabilizing member (6).

7. A modular energy storage device for grid connection according to any one of claims 1-6, characterized in that: The bottom end of the column (2) is provided with a turntable (203), the base plate (601) is set on the turntable (203), the bottom of the cabinet (1) is provided with a circular groove (101), the turntable (203) cooperates with the circular groove (101), and a shaft (102) is rotatably fitted at the center of the bottom inner wall of the circular groove (101), the top end of the shaft (102) is connected to the bottom of the turntable (203).

8. A modular energy storage device for grid connection according to claim 1, characterized in that: The cabinet (1) has two hinged doors (103), each door (103) is equipped with a handle, both sides of the cabinet (1) are equipped with heat dissipation mesh, and the bottom of the cabinet (1) is equipped with four rubber pads.

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