An emergency power supply device based on virtual power plant

Abstract

The present invention belongs to the technical field of power supply devices, and in particular, relates to an emergency power supply device based on a virtual power plant, including a box body, a battery is arranged in the box body, two terminals are symmetrically fixedly connected to the bottom of the battery, a cover plate is detachably installed on the rear side of the box body, and two connecting sleeves are inserted through the bottom of the box body. The present invention is provided with a connecting assembly, when an overload or short circuit occurs at the terminal, the fuse can be broken from its notch, and then the metal connecting ring can be sleeved on the insulating column under the pull of the reset spring, so as to realize the disconnection operation of the terminal and the connecting column, thereby protecting the safety of household electrical appliances, and the fuse after the fuse is fused can be completely separated from its upper half under the pull of the metal connecting ring, avoiding abnormal discharge caused by the existing fuse breaking too close, and improving the safety after the fuse breaks.

Description

Technical Field

[0001] The present invention belongs to the technical field of power supply devices, and in particular relates to an emergency power supply device based on a virtual power plant. Background Art

[0002] A virtual power plant is a power coordination management system that uses advanced information communication technologies and software systems to achieve aggregation and coordinated optimization of DERs such as DG, energy storage systems, controllable loads, and electric vehicles, so that it can participate in the power market and power grid operation as a special power plant. The core of the concept of a virtual power plant can be summarized as "communication" and "aggregation". The key technologies of virtual power plants mainly include coordinated control technology, smart metering technology, and information and communication technology. The most attractive function of a virtual power plant is that it can aggregate DERs to participate in the operation of the power market and ancillary service market, and provide management and ancillary services for distribution and transmission networks.

[0003] The key factors that make virtual power plants possible are various energy storage devices and some emergency power supply devices, which can store excess power when the power is sufficient and release it when the power is insufficient, thereby alleviating power pressure. With the popularization of virtual power plants, many households are gradually equipped with emergency power supply devices. However, due to the lack of suitable protective devices at the wiring terminals and outlets of existing emergency power supply devices, when the emergency power supply is short-circuited or overloaded, the electrical appliances in the home that use it as a power source may be damaged.

[0004] Therefore, it is necessary to invent an emergency power supply device based on a virtual power plant to solve the above problems. Summary of the invention

[0005] In view of the above problems, the present invention provides an emergency power supply device based on a virtual power plant to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An emergency power supply device based on a virtual power plant comprises a box body, in which a storage battery is arranged, and two terminal posts are symmetrically fixedly connected to the bottom of the storage battery, and a cover plate is detachably installed on the rear side of the box body, and two connecting sleeves are inserted through the bottom of the box body, and the two connecting sleeves are respectively opposite to the two terminal posts, and the bottom ends of the two connecting sleeves are respectively connected to an incoming line and an outgoing line, and a metal connecting column is inserted into the top end of the connecting sleeve, and the bottom end of the connecting column is connected to the incoming line or the outgoing line, a locking sleeve is rotatably sleeved on the connecting column, and the locking sleeve is threadedly sleeved on the top end of the connecting sleeve, an insulating column is fixedly sleeved on the top of the connecting sleeve, and the diameter of the insulating column matches the diameter of the connecting column, and a cylindrical metal connecting block with the same diameter is fixedly connected to the top end of the insulating column, and an insulating ring is fixedly sleeved on the bottom end of the insulating column, and a connecting assembly is arranged on the top of the insulating ring.

[0008] Furthermore, the connection assembly includes a metal connection ring, a reset spring is fixedly connected between the bottom of the metal connection ring and the top of the insulating ring, the reset spring is sleeved on the insulating column, the metal connection ring is slidably sleeved on the metal connection block, a groove is provided on one side of the metal connection ring, a fuse is connected between the groove and the terminal at the top of the groove, the two ends of the fuse are respectively connected to the terminal and the metal connection ring by screws, and notches are symmetrically provided at the front and rear sides of the fuse facing the bottom of the terminal, and the side of the metal connection ring is symmetrical to the groove An arc-shaped metal connecting plate is arranged at the position, the axis center of the metal connecting plate coincides with the axis center of the connecting column, and the metal connecting plate and the metal connecting ring are tightly fitted together, the top of the metal connecting plate is flush with the top end of the connecting column, and the bottom of the metal connecting plate is fixedly connected with a metal fixing ring, the metal fixing ring is fixedly sleeved on the connecting column, and the metal fixing ring is located at the bottom of the insulating ring, and a vertical limit groove is opened on one side of the metal connecting plate close to the metal connecting ring, a limit block is slidably installed in the limit groove, and the limit block is connected to the side fixing tube of the metal connecting ring.

[0009] Furthermore, an insulating telescopic tube is sleeved on the outer periphery of the connecting column, and the telescopic tube is made of high temperature resistant material, the maximum length of the telescopic tube is greater than the distance between the bottom of the battery and the inner wall of the bottom of the box body, the top edge and the bottom edge of the telescopic tube both protrude outward, and two telescopic rods are symmetrically and vertically fixedly connected between the protruding parts at the top and bottom of the telescopic tube, a support spring is sleeved on the telescopic rod, and the two ends of the support spring are respectively fixedly connected to the protruding parts at the top and bottom of the telescopic tube, and a fire extinguishing assembly is installed on the inner wall of the telescopic tube close to the fuse.

[0010] Furthermore, the fire extinguishing assembly includes an arc-shaped storage box, which is fixedly connected to the inner wall of the telescopic tube on the side close to the fuse, and the storage box is close to the bottom end of the telescopic tube. A plurality of strip holes are evenly opened on the side of the storage box close to the fuse. An airbag is arranged in the storage box, and a dry powder fire extinguishing agent is arranged in the airbag. A pressure plate is arranged on the top of the airbag, and a spike is arranged on the bottom end of the pressure plate. Two pressure rods are vertically fixedly connected to the top of the pressure plate, and the pressure rods are slidably inserted into the top of the storage box. A top plate is fixedly connected between the top ends of the two pressure rods, and a movable plate is horizontally arranged on the top of the top plate, and the movable plate is fixedly connected to the metal connecting ring.

[0011] Furthermore, an arc-shaped protective plate is fixedly connected to the top of the metal connecting ring, and the axis of the protective plate coincides with that of the metal connecting plate. The inner diameter and outer diameter of the protective plate respectively match the diameter of the connecting column and the inner diameter of the metal connecting plate. The top of the protective plate protrudes outward, and a slot is provided at the bottom of the protruding part of the protective plate, and the size of the slot matches the size of the top of the metal connecting plate.

[0012] Furthermore, a plurality of deflection grooves are distributed in a ring shape on the side of the metal connecting block, and a metal bow-shaped spring piece is arranged in the deflection groove. The middle part of the bow-shaped spring piece protrudes toward the direction close to the metal connecting ring and is tightly attached to the metal connecting ring, and the top of the bow-shaped spring piece is fixedly connected to the inner wall of the top of the deflection groove.

[0013] Furthermore, in the initial state, there is a gap between the movable plate and the top plate, and the distance between the two is smaller than the maximum displacement of the metal connecting ring pulled downward by the return spring.

[0014] Furthermore, a circular insulating block is fixedly connected to the top of the metal connecting block, and the diameter of the insulating block matches the top diameter of the connecting column.

[0015] Furthermore, the arc length of the protective plate is greater than the arc length of the metal connecting plate, and the height of the protective plate is greater than the height of the metal connecting block.

[0016] Technical effects and advantages of the present invention:

[0017] 1. The present invention is provided with a connection assembly. During use, when an overload or short circuit occurs at the terminal, the fuse can be broken from its notch. As the fuse breaks, the metal connection ring can move downward under the pull of the reset spring and finally sleeved on the insulating column, thereby realizing the disconnection operation of the terminal and the connection column, thereby protecting the safety of household electrical appliances. In addition, since the breaking point of the fuse is close to the bottom end of the terminal, the fuse after being fused can be completely separated from its upper half under the pull of the metal connection ring, avoiding abnormal discharge caused by the existing fuse breaking point being too close, thereby improving the safety of the fuse after breaking.

[0018] 2. During the use of the present invention, when the fuse breaks due to a fault, the reset spring pulls the metal connecting ring downward, and when the top plate is hit by the movable plate, the top plate can push the pressing plate downward through the pressing rod, so that the spikes at the bottom of the pressing plate can pierce the airbag. Subsequently, as the pressing plate continues to move downward, the airbag can spray the dry powder fire extinguishing agent inside it through the strip hole into the area inside the telescopic tube under the pressure of the pressing plate, so that when a fire occurs at the terminal, the dry powder fire extinguishing agent can extinguish the fire point to avoid fire;

[0019] 3. The present invention is provided with a protective plate. When the metal connecting ring drives the protective plate to move downward under the pull of the reset spring, as the metal connecting ring is sleeved on the insulating column, the protective plate can also be isolated between the metal connecting plate and the metal connecting block, and the card groove of the outwardly protruding part of the protective plate can be snapped on the top of the metal connecting plate, thereby effectively isolating the abnormal discharge between the metal connecting plate and the terminal, and ensuring the safety of the household electrical equipment after power failure;

[0020] 4. The present invention is provided with a bow-shaped spring piece. When the metal connecting ring is sleeved on the metal connecting block, the bow-shaped spring piece can maintain a tight fit with the metal connecting ring under the action of its own elastic force, thereby ensuring a stable electrical connection between the metal connecting block and the metal connecting ring. By providing an insulating block, when the fuse breaks, the metal connecting ring drives the broken fuse to move downward, and the electrical connection between the connecting post and the terminal post is also disconnected. The insulating block can always isolate the connecting post and the terminal post, thereby effectively avoiding abnormal discharge between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a three-dimensional schematic diagram of all structures of the present invention except the cover plate;

[0023] Figure 3 It is a three-dimensional schematic diagram of the internal structure of the box body in the present invention;

[0024] Figure 4 It is a three-dimensional schematic diagram of the structure of the box, battery, terminal and insulating column in the present invention;

[0025] Figure 5 The present invention Figure 4 A magnified view of part A;

[0026] Figure 6 It is a three-dimensional schematic diagram of the telescopic tube and its internal structure in the present invention;

[0027] Figure 7 It is a three-dimensional schematic diagram of the structures of the connecting column, the locking sleeve, the insulating column and the bow-shaped spring piece in the present invention;

[0028] Figure 8 It is a three-dimensional schematic diagram of the connecting column, part of the connecting assembly, the insulating ring, the insulating block and the movable plate in the present invention;

[0029] Fig. 9 It is a three-dimensional cross-sectional view of the fire extinguishing assembly in the present invention.

[0030] In the figure: 1. box body; 2. battery; 3. terminal; 4. cover plate; 5. connecting sleeve; 6. incoming line; 7. outgoing line; 8. connecting post; 9. locking sleeve; 10. insulating post; 11. insulating ring; 12. connecting assembly; 121. metal connecting ring; 122. reset spring; 123. fuse; 124. screw; 125. notch; 126. metal connecting plate; 127. metal fixing ring; 128. limit block; 13. telescopic tube; 14. telescopic rod; 15. support spring; 16. fire extinguishing assembly; 161. storage box; 162. airbag; 163. pressure plate; 164. spike; 165. pressure rod; 166. top plate; 167. movable plate; 17. protective plate; 18. bow-shaped spring; 19. insulating block; 20. metal connecting block. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0032] The present invention provides Figures 1 to 9The emergency power supply device based on a virtual power plant shown in the figure comprises a box body 1, in which a battery 2 is arranged, and the bottom of the battery 2 is symmetrically fixedly connected with two terminal posts 3, and a cover plate 4 is detachably installed on the rear side of the box body 1, and two connecting sleeves 5 are inserted through the bottom of the box body 1, and the two connecting sleeves 5 are respectively opposite to the two terminal posts 3, and the bottom ends of the two connecting sleeves 5 are respectively connected with an incoming line 6 and an outgoing line 7, and the top of the connecting sleeve 5 is inserted with a metal connecting post 8, and the connecting post The bottom end of 8 is connected with the incoming line 6 or the outgoing line 7, a locking sleeve 9 is rotatably sleeved on the connecting column 8, the locking sleeve 9 is threadedly sleeved on the top of the connecting sleeve 5, the top of the connecting column 8 is fixedly sleeved with an insulating column 10, the diameter of the insulating column 10 matches the diameter of the connecting column 8, and the top of the insulating column 10 is fixedly connected with a cylindrical metal connecting block 20 with the same diameter, the bottom end of the insulating column 10 is fixedly sleeved with an insulating ring 11, and the top of the insulating ring 11 is provided with a connecting component 12.

[0033] The connecting assembly 12 comprises a metal connecting ring 121, a reset spring 122 is fixedly connected between the bottom of the metal connecting ring 121 and the top of the insulating ring 11, the reset spring 122 is sleeved on the insulating column 10, the metal connecting ring 121 is slidably sleeved on the metal connecting block 20, a groove is provided on one side of the metal connecting ring 121, a fuse 123 is connected between the groove and the terminal 3 at the top, the two ends of the fuse 123 are respectively connected to the terminal 3 and the metal connecting ring 121 by screws 124, and notches 125 are symmetrically provided at the front and rear sides of the fuse 123 and the bottom of the terminal 3, and the side of the metal connecting ring 121 is symmetrical to the groove. An arc-shaped metal connecting plate 126 is provided, the axis of the metal connecting plate 126 coincides with the axis of the connecting column 8, and the metal connecting plate 126 is tightly fitted together with the metal connecting ring 121, the top of the metal connecting plate 126 is flush with the top of the connecting column 8, and the bottom of the metal connecting plate 126 is fixedly connected with a metal fixing ring 127, the metal fixing ring 127 is fixedly sleeved on the connecting column 8, and the metal fixing ring 127 is located at the bottom of the insulating ring 11, and a vertical limit groove is opened on one side of the metal connecting plate 126 close to the metal connecting ring 121, and a limit block 128 is slidably installed in the limit groove, and the limit block 128 is connected to the side fixed tube of the metal connecting ring 121.

[0034] Before use, the two connecting columns 8 can be connected together with the connecting sleeves 5 at the incoming line 6 and the outgoing line 7 through their respective locking sleeves 9, and then the metal connecting ring 121 is pulled to move it upward along the connecting column 8. During this process, the reset spring 122 is gradually stretched, and the limit block 128 can move upward along the limit groove. When the metal connecting ring 121 moves to the position of the metal connecting block 20, the fuse 123 is connected to the metal connecting ring 121 and the terminal 3 through the screw 124. At this time, the terminal 3 can be connected to the connecting column 8 through the fuse 123, the metal connecting ring 121, the metal connecting block 20 and the metal connecting plate 126. Finally, the incoming line 6 and the outgoing line 7 are respectively connected to the bottom of the two connecting sleeves 5, so as to achieve electrical connection with the battery 2.

[0035] During use, when an overload or short circuit occurs at the terminal 3, the fuse 123 can break from its notch 125. As the fuse 123 breaks, the metal connecting ring 121 can move downward under the pull of the reset spring 122 and separate from the metal connecting block 20, and finally be sleeved on the insulating column 10, thereby realizing the disconnection operation of the terminal 3 and the connecting column 8, thereby protecting the safety of household electrical appliances.

[0036] And because the breaking point of the fuse 123 is close to the bottom end of the terminal 3, the fuse 123 after being blown can be completely separated from its upper half under the pulling of the metal connecting ring 121, avoiding abnormal discharge caused by the breaking point of the existing fuse 123 being too close, thereby improving the safety of the fuse 123 after breaking.

[0037] like Figures 2 to 9 As shown, the outer periphery of the connecting column 8 is sleeved with an insulating telescopic tube 13, and the telescopic tube 13 is made of high temperature resistant material, the maximum length of the telescopic tube 13 is greater than the distance between the bottom of the battery 2 and the bottom inner wall of the box body 1, the top edge and the bottom edge of the telescopic tube 13 both protrude outward, and two telescopic rods 14 are symmetrically and vertically fixedly connected between the protruding parts at the top and bottom of the telescopic tube 13, the telescopic rod 14 is sleeved with a support spring 15, and the two ends of the support spring 15 are respectively fixedly connected to the protruding parts at the top and bottom of the telescopic tube 13, and a fire extinguishing assembly 16 is installed on the inner wall of the telescopic tube 13 close to the fuse 123.

[0038] The fire extinguishing assembly 16 includes an arc-shaped storage box 161, which is fixedly connected to the inner wall of the telescopic tube 13 on the side close to the fuse 123, and the storage box 161 is close to the bottom end of the telescopic tube 13. A plurality of strip holes are evenly opened on the side of the storage box 161 close to the fuse 123. An air bag 162 is arranged in the storage box 161, and a dry powder fire extinguishing agent is arranged in the air bag 162. A pressure plate 163 is arranged on the top of the air bag 162, and a spike 164 is arranged at the bottom of the pressure plate 163. Two pressure rods 165 are vertically fixedly connected to the top of 163, and the pressure rods 165 are slidably inserted into the top of the storage box 161, and a top plate 166 is fixedly connected between the top ends of the two pressure rods 165. A movable plate 167 is horizontally arranged at the top of the top plate 166, and the movable plate 167 is fixedly connected to the metal connecting ring 121. In the initial state, there is a gap between the movable plate 167 and the top plate 166, and the distance between the two is smaller than the maximum displacement of the reset spring 122 pulling the metal connecting ring 121 downward.

[0039] By providing the telescopic tube 13, when the connecting column 8 is connected to the connecting sleeve 5 through the locking sleeve 9, one end of the fuse 123 is first connected to the metal connecting ring 121 with a screw 124, and then the telescopic tube 13 is compressed to drive the telescopic rod 14 and the supporting spring 15 to contract together, and then the compressed telescopic tube 13 is sleeved on the outside of the connecting column 8 from the top end of the connecting column 8 and the storage box 161 is located on the side where the fuse 123 is located, and then the fuse 123 is pulled while keeping the telescopic tube 13 in the compressed state. The fuse 123 is moved upwards to drive the metal connecting ring 121 to move upwards. During this process, the reset spring 122 is gradually stretched. When the top of the fuse 123 is opposite to the terminal 3, the fuse 123 is connected to the terminal 3 with the screw 124. After the fuse 123 is installed, the telescopic tube 13 is loosened. The telescopic tube 13 can be extended under the action of the telescopic rod 14 and the supporting spring 15, and finally the top and bottom of the telescopic tube 13 are respectively attached to the bottom of the battery 2 and the bottom inner wall of the box body 1.

[0040] When the fuse 123 breaks due to a fault, the return spring 122 pulls the metal connecting ring 121 downward. Due to the gap between the movable plate 167 and the pressure plate 163, the metal connecting ring 121 can accelerate the movable plate 167 to collide with the top plate 166 at its bottom as the return spring 122 contracts rapidly. When the top plate 166 is hit, the top plate 166 can push the pressure plate 163 downward through the pressure rod 165, so that the spike 164 at the bottom of the pressure plate 163 can pierce the airbag 162. Subsequently, as the pressure plate 163 continues to move downward, the airbag 162 can spray the dry powder fire extinguishing agent inside it through the strip hole into the area inside the telescopic tube 13 under the squeezing of the pressure plate 163. Therefore, when a fire occurs at the terminal 3, the dry powder fire extinguishing agent can extinguish the fire point to avoid fire.

[0041] like Figure 6 As shown, the top of the metal connecting ring 121 is fixedly connected with an arc-shaped protective plate 17, and the axis of the protective plate 17 coincides with that of the metal connecting plate 126. The inner diameter and outer diameter of the protective plate 17 respectively match the diameter of the connecting column 8 and the inner diameter of the metal connecting plate 126, and the top of the protective plate 17 protrudes outward, and a slot is provided at the bottom of the protruding part of the protective plate 17, and the size of the slot matches the size of the top of the metal connecting plate 126. The arc length of the protective plate 17 is greater than the arc length of the metal connecting plate 126, and the height of the protective plate 17 is greater than the height of the metal connecting block 20.

[0042] By providing the protective plate 17, when the metal connecting ring 121 drives the protective plate 17 to move downward under the pull of the reset spring 122, as the metal connecting ring 121 is sleeved on the insulating column 10, the protective plate 17 can also be isolated between the metal connecting plate 126 and the metal connecting block 20, and the card groove of the outward protruding part of the protective plate 17 can be snapped on the top of the metal connecting plate 126, thereby effectively isolating the abnormal discharge between the metal connecting plate 126 and the terminal 3, and ensuring the safety of household electrical appliances after power failure.

[0043] like Figure 7 As shown, a plurality of deflection grooves are distributed in a ring shape on the side of the metal connecting block 20, and a metal bow-shaped spring piece 18 is arranged in the deflection groove. The middle part of the bow-shaped spring piece 18 protrudes toward the direction close to the metal connecting ring 121 and is tightly attached to the metal connecting ring 121, and the top end of the bow-shaped spring piece 18 is fixedly connected to the inner wall of the top of the deflection groove.

[0044] By providing the bow-shaped spring piece 18 , when the metal connecting ring 121 is sleeved on the metal connecting block 20 , the bow-shaped spring piece 18 can maintain a tight fit with the metal connecting ring 121 under the action of its own elastic force, thereby ensuring a stable electrical connection between the metal connecting block 20 and the metal connecting ring 121 .

[0045] like Figures 6 to 8 As shown, a circular insulating block 19 is fixedly connected to the top of the metal connecting block 20 , and the diameter of the insulating block 19 matches the top diameter of the connecting column 8 .

[0046] By providing the insulating block 19, when the fuse 123 breaks, the metal connecting ring 121 drives the broken fuse 123 to move downward, and the electrical connection between the connecting post 8 and the terminal 3 is also disconnected. The insulating block 19 can always isolate the connecting post 8 and the terminal 3, thereby effectively avoiding abnormal discharge between the two.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them.

Claims

1. An emergency power supply device based on a virtual power plant, comprising a box (1), characterized in that: The box (1) is provided with a storage battery (2), the bottom of the storage battery (2) is symmetrically fixedly connected to two terminal posts (3), the rear side of the box (1) is detachably mounted with a cover plate (4), the bottom of the box (1) is penetrated by two connecting sleeves (5) and the two connecting sleeves (5) are respectively opposite to the two terminal posts (3), the bottom ends of the two connecting sleeves (5) are respectively connected to an incoming line (6) and an outgoing line (7), the top end of the connecting sleeve (5) is plugged with a metal connecting post (8), and the bottom end of the connecting post (8) is connected to the incoming line (6) or the outgoing line (7). The connecting column (7) is connected together, a locking sleeve (9) is rotatably sleeved on the connecting column (8), the locking sleeve (9) is threadedly sleeved on the top of the connecting sleeve (5), an insulating column (10) is fixedly sleeved on the top of the connecting column (8), the diameter of the insulating column (10) matches the diameter of the connecting column (8), and a cylindrical metal connecting block (20) with the same diameter is fixedly connected to the top of the insulating column (10), an insulating ring (11) is fixedly sleeved on the bottom of the insulating column (10), and a connecting assembly (12) is arranged on the top of the insulating ring (11); The connection assembly (12) comprises a metal connection ring (121), a reset spring (122) being fixedly connected between the bottom of the metal connection ring (121) and the top of the insulating ring (11), the reset spring (122) being sleeved on the insulating column (10), the metal connection ring (121) being slidably sleeved on the metal connection block (20), a groove being provided on one side of the metal connection ring (121), a fuse (123) being connected between the groove and the terminal (3) at the top thereof, the two ends of the fuse (123) being connected to the terminal (3) and the metal connection ring (121) by screws (124), and notches (125) being symmetrically provided on the front and rear sides of the fuse (123) at positions directly opposite to the bottom of the terminal (3), and the side surface of the metal connection ring (121) being symmetrical to the groove An arc-shaped metal connecting plate (126) is provided at the position, the axis of the metal connecting plate (126) coincides with the axis of the connecting column (8), and the metal connecting plate (126) and the metal connecting ring (121) are tightly fitted together, the top of the metal connecting plate (126) is flush with the top of the connecting column (8), the bottom of the metal connecting plate (126) is fixedly connected to a metal fixing ring (127), the metal fixing ring (127) is fixedly sleeved on the connecting column (8), and the metal fixing ring (127) is located at the bottom of the insulating ring (11), a vertical limit groove is provided on one side of the metal connecting plate (126) close to the metal connecting ring (121), a limit block (128) is slidably installed in the limit groove, and the limit block (128) is connected to a fixed tube on the side of the metal connecting ring (121); An insulating telescopic tube (13) is sleeved on the periphery of the connecting column (8), and the telescopic tube (13) is made of a high temperature resistant material. The maximum length of the telescopic tube (13) is greater than the distance between the bottom of the battery (2) and the bottom inner wall of the box body (1). The top edge and the bottom edge of the telescopic tube (13) both protrude outwards, and two telescopic rods (14) are symmetrically and vertically fixedly connected between the protruding parts at the top and bottom of the telescopic tube (13). A support spring (15) is sleeved on the telescopic rod (14), and the two ends of the support spring (15) are respectively fixedly connected to the protruding parts at the top and bottom of the telescopic tube (13). A fire extinguishing assembly (16) is installed on the inner wall of the telescopic tube (13) on the side close to the fuse (123).

2. The emergency power supply device based on a virtual power plant according to claim 1, characterized in that: The fire extinguishing assembly (16) comprises an arc-shaped storage box (161), the storage box (161) being fixedly connected to the inner wall of the telescopic tube (13) on the side close to the fuse (123), and the storage box (161) being close to the bottom end of the telescopic tube (13), a plurality of strip-shaped holes being evenly formed on the side close to the fuse (123), an air bag (162) being arranged in the storage box (161), a dry powder fire extinguishing agent being arranged in the air bag (162), and a top of the air bag (162) A pressure plate (163) is provided, and a spike (164) is provided at the bottom end of the pressure plate (163). Two pressure rods (165) are vertically fixedly connected to the top of the pressure plate (163). The pressure rods (165) are slidably inserted into the top of the storage box (161). A top plate (166) is fixedly connected between the top ends of the two pressure rods (165). A movable plate (167) is horizontally provided at the top of the top plate (166). The movable plate (167) is fixedly connected to the metal connecting ring (121).

3. The emergency power supply device based on a virtual power plant according to claim 2 is characterized in that: An arc-shaped protective plate (17) is fixedly connected to the top of the metal connecting ring (121), and the axes of the protective plate (17) and the metal connecting plate (126) coincide with each other. The inner diameter and outer diameter of the protective plate (17) respectively match the diameter of the connecting column (8) and the inner diameter of the metal connecting plate (126), and the top of the protective plate (17) protrudes outwards. A slot is provided at the bottom of the protruding portion of the protective plate (17), and the size of the slot matches the size of the top of the metal connecting plate (126).

4. The emergency power supply device based on a virtual power plant according to claim 3 is characterized in that: A plurality of deflection grooves are distributed in an annular manner on the side surface of the metal connection block (20), and a metal bow-shaped spring piece (18) is arranged in the deflection groove. The middle part of the bow-shaped spring piece (18) protrudes in a direction close to the metal connection ring (121) and is tightly attached to the metal connection ring (121), and the top end of the bow-shaped spring piece (18) is fixedly connected to the inner wall of the top of the deflection groove.

5. The emergency power supply device based on a virtual power plant according to claim 4 is characterized in that: In the initial state, there is a gap between the movable plate (167) and the top plate (166), and the distance between the two is smaller than the maximum displacement of the metal connecting ring (121) pulled downward by the return spring (122).

6. The emergency power supply device based on a virtual power plant according to claim 5 is characterized in that: A circular insulating block (19) is fixedly connected to the top of the metal connecting block (20), and the diameter of the insulating block (19) matches the top diameter of the connecting column (8).

7. The emergency power supply device based on a virtual power plant according to claim 6 is characterized in that: The arc length of the protection plate (17) is greater than the arc length of the metal connection plate (126), and the height of the protection plate (17) is greater than the height of the metal connection block (20).

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