Direct current side over-current protection device of energy storage converter

Abstract

The utility model relates to the converter field, and discloses an energy storage converter DC side over-current protection device comprising a base plate, the outer wall of the base plate is fixedly connected with a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly provided with a rack, the lower surface of the rack is slidably connected to the upper surface of the base plate, the tooth end of the rack is engaged with a gear, and the gear is engaged with the hydraulic cylinder. A second swing rod is rotatably connected to the outer wall of the first swing rod, a supporting plate is rotatably connected to the outer wall of the second swing rod, the inner wall of the supporting plate is rotatably connected to the outer wall of the fixing rod, the lower surface of the sliding rail is fixedly connected to the upper surface of the bottom plate, and a dismounting assembly is arranged on the upper surface of the supporting plate. And the dismounting and mounting assembly is used for dismounting and mounting the converter. According to the utility model, the rack is pushed by the hydraulic cylinder to enable the gear to rotate, and the supporting plate is driven to lift by the second oscillating rod, so that the effect of facilitating circuit connection and fixation operation by installation personnel is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flow converter, especially to energy storage flow converter DC side overcurrent protection device. BACKGROUND

[0002] The energy storage flow converter is a key equipment connecting the energy storage system and the power grid, which is mainly responsible for realizing the conversion of electric energy form, including converting the direct current of the energy storage equipment into alternating current to deliver electric energy to the power grid, or converting the alternating current of the power grid into direct current to charge the energy storage equipment.

[0003] The battery in the energy storage system is the core part of energy storage. When overcurrent occurs on the DC side, it may be that the battery pack has internal short circuit or external line abnormality, etc. The battery will release a large amount of electric energy in a short time, resulting in over-discharge. For lithium battery, excessive discharge may cause irreversible reaction of chemical substances in the battery, such as collapse of negative material structure and decomposition of electrolyte, thereby seriously damaging the battery and shortening the service life of the battery.

[0004] The existing energy storage flow converter DC side overcurrent protection device has a fixed installation position when installing the overcurrent protection equipment. For some energy storage flow converters installed in high position or deep cabinet, it is difficult for the installer to easily place the protection device to the appropriate position and operate in the limited space, which is not only inconvenient but also has safety hazards. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides an energy storage flow converter DC side overcurrent protection device, which aims to solve the problem that the existing energy storage flow converter DC side overcurrent protection device has a fixed installation position when installing the overcurrent protection equipment, and it is difficult for the installer to easily place the protection device to the appropriate position and operate in the limited space, which is not only inconvenient but also has safety hazards.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] The utility model provides an energy storage converter DC side overcurrent protection device, including the bottom plate, the outer wall of bottom plate is fixedly connected with hydraulic cylinder, the output of hydraulic cylinder is fixedly provided with rack, the lower surface of rack is connected in the upper surface of bottom plate slidably, the tooth end of rack is connected with gear, the inner wall of gear is fixedly connected with fixed link, the outer wall of fixed link is rotatably connected in the inner wall of bottom plate, the outer wall of fixed link is fixedly connected with first swing link, the outer wall of first swing link is rotatably connected in the inner wall of bottom plate, the outer wall of first swing link is rotatably connected with second swing link, the outer wall of second swing link is rotatably connected with support plate, the inner wall of support plate is rotatably connected in the outer wall of fixed link, the outer wall of support plate is slidably connected with slide rail, the lower surface of slide rail is fixedly connected in the upper surface of bottom plate, the upper surface of support plate is provided with dismounting assembly, and the dismounting assembly is used for dismounting converter.

[0008] Preferably, the dismounting assembly includes a T-shaped piece, the lower surface of the T-shaped piece is fixedly connected to the upper surface of the support plate, the lower surface of the support plate is fixedly connected with a first motor, the output end of the first motor is fixedly provided on the outer wall of the T-shaped piece, the outer wall of the T-shaped piece is rotatably connected to the inner wall of the support plate, and the outer wall of the T-shaped piece is rotatably connected to the inner wall of the limiting block.

[0009] Preferably, the upper surface of the T-shaped piece is rotatably connected with a connecting rod, the inner wall of the connecting rod is rotatably connected with a push-pull block, the inner wall of the push-pull block is rotatably connected with a connecting clamping block, the outer wall of the connecting clamping block is slidably connected with a connecting block, the inner wall of the connecting block is rotatably connected with a rotating lock, and the outer wall of the rotating lock is slidably connected to the inner wall of the connecting clamping block.

[0010] Preferably, the outer wall of the push-pull block is fixedly connected with a first lock block, the outer wall of the first lock block is slidably connected to the inner wall of the connecting block, the right inner wall of the connecting block is fixedly connected with a first spring, the outer wall of the first spring is fixedly connected with a sliding block, and the outer wall of the sliding block is slidably connected to the inner wall of the connecting block.

[0011] Preferably, the outer wall of the sliding block is slidably connected to the outer wall of the first lock block, the inner wall of the sliding block is slidably connected with a second lock block, the outer wall of the second lock block is fixedly connected with a transformer body, and the lower surface of the transformer body is slidably connected to the inner wall of the protection box body.

[0012] Preferably, the inner wall of the protection box body is fixedly connected with a left hollow rail, the inner wall of the left hollow rail is fixedly connected with a second spring, the outer wall of the second spring is fixedly connected with a rotating clamping block, and the inner wall of the rotating clamping block is fixedly connected with a sliding column.

[0013] Preferably, the outer wall of the rotating clamping block is slidingly connected to the inner wall of the right hollow rail, the outer wall of the rotating clamping block is rotatably connected to a hollow block, the right outer wall of the hollow block is fixedly connected to the outer wall of the transformer body, the inner wall of the hollow rail is provided with a sliding column, the outer wall of the sliding column is slidingly connected to the inner wall of the right hollow rail, and the outer wall of the sliding column is fixedly connected to the inner wall of the left hollow rail.

[0014] Preferably, the inner bottom wall of the protection box body is fixedly connected to a limiting circular block, the upper surface of the limiting circular block is fixedly connected to a second motor, the output end of the second motor is fixedly provided with a connecting circular rod, the outer wall of the connecting circular rod is rotatably connected to the inner wall of the limiting circular block, and the inner bottom wall of the protection box body is fixedly connected to a limiting column.

[0015] Preferably, the outer wall of the connecting circular rod is rotatably connected to a first rotating rod, the inner wall of the first rotating rod is rotatably connected to a rotating piece, the inner wall of the rotating piece is rotatably connected to a fixing column, and the outer wall of the fixing column is fixedly connected to the inner bottom wall of the protection box body.

[0016] Preferably, the outer wall of the rotating piece is rotatably connected to a second rotating rod, the inner wall of the second rotating rod is rotatably connected to a protection door, and the outer wall of the protection door is rotatably connected to the outer wall of the protection box body.

[0017] The utility model has the advantages of the following:

[0018] 1. In the utility model, the rack is pushed by the hydraulic cylinder to rotate the gear, the fixed rod is driven to rotate by the gear, the first swing rod drives the second swing rod to swing, the second swing rod drives the supporting plate to lift, and the protection equipment can be easily lifted or lowered to the height matched with the DC bus or other connection points in the using process, so that the installation personnel can conveniently operate the line connection and fixing.

[0019] 2. In the utility model, the first motor drives the T-shaped piece to rotate, the connecting rod can drive the first lock block fixedly arranged on the outer wall of the push-pull block to push and pull, the sliding block is clamped to the second lock block and the first lock block by the first spring, the rotating clamping block is clamped to the hollow block by the second spring, the protection equipment with faults can be quickly disassembled for detection, and the installation process is simple and fast, and the downtime of the energy storage system is reduced.

[0020] 3. In the utility model, the second motor drives the connecting circular rod to rotate in the inner wall of the limiting circular block, the connecting circular rod can drive the first rotating rod to swing, the rotating piece is driven to rotate by the first rotating rod, the second rotating rod is driven to swing by the second rotating rod, the protection door is driven to swing by the second rotating rod, the operation space is provided for the maintenance personnel, the electrical elements can be effectively isolated from the outside in the closed state to prevent foreign matters from entering the protection equipment and reduce the risk of circuit short circuit. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A perspective view of the over-current protection device for the DC side of the energy storage converter according to the present application is shown in the figure;

[0022] Figure 2 A second swing lever partial structure schematic view of the over-current protection device for the DC side of the energy storage converter according to the present application is shown in the figure;

[0023] Figure 3 A T-shaped sheet partial structure schematic view of the over-current protection device for the DC side of the energy storage converter according to the present application is shown in the figure;

[0024] Figure 4 A first lock block partial structure schematic view of the over-current protection device for the DC side of the energy storage converter according to the present application is shown in the figure;

[0025] Figure 5 A first spring partial structure schematic view of the over-current protection device for the DC side of the energy storage converter according to the present application is shown in the figure;

[0026] Figure 6 A rotating clamping block partial structure schematic view of the over-current protection device for the DC side of the energy storage converter according to the present application is shown in the figure;

[0027] Figure 7 A first rotating lever partial structure schematic view of the over-current protection device for the DC side of the energy storage converter according to the present application is shown in the figure.

[0028] LEGEND:

[0029] 1, base plate; 2, hydraulic cylinder; 3, rack; 4, gear; 5, fixed rod; 6, first swing lever; 7, second swing lever; 8, slide rail; 9, support plate; 10, protection box body; 11, protection door; 12, first motor; 13, T-shaped sheet; 14, limiting block; 15, connecting rod; 16, push-pull block; 17, transformer body; 18, connecting clamping block; 19, rotating lock; 20, connecting block; 21, first lock block; 22, first spring; 23, sliding block; 24, second lock block; 25, hollow rail; 26, second spring; 27, sliding column; 28, rotating clamping block; 29, hollow block; 30, second motor; 31, connecting round rod; 32, limiting round block; 33, limiting column; 34, first rotating lever; 35, rotating sheet; 36, fixed column; 37, second rotating lever. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the utility model's specification. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the scope of the utility model protection.

[0031] With reference to Figure 1 and Figure 2 An embodiment provided by the utility model: energy storage converter DC side overcurrent protection device, including the bottom plate 1, the outer wall of bottom plate 1 is fixedly connected with hydraulic cylinder 2, the output end of hydraulic cylinder 2 is fixedly provided with rack 3, the lower surface of rack 3 is slidably connected on the upper surface of bottom plate 1, the tooth end of rack 3 is engagedly connected with gear 4, the inner wall of gear 4 is fixedly connected with fixed rod 5, the outer wall of fixed rod 5 is rotatably connected on the inner wall of bottom plate 1, the outer wall of fixed rod 5 is fixedly connected with first swing rod 6, the outer wall of first swing rod 6 is rotatably connected on the inner wall of bottom plate 1, the outer wall of first swing rod 6 is rotatably connected with second swing rod 7, the outer wall of second swing rod 7 is rotatably connected with support plate 9, the inner wall of support plate 9 is rotatably connected on the outer wall of fixed rod 5, the outer wall of support plate 9 is slidably connected with slide rail 8, the lower surface of slide rail 8 is fixedly connected on the upper surface of bottom plate 1, the upper surface of support plate 9 is provided with dismounting assembly, and the dismounting assembly is used for dismounting converter.

[0032] Specifically, the hydraulic cylinder 2 fixed on the bottom plate 1 drives the rack 3 to slide on the upper surface of the bottom plate 1, achieving stable sliding effect in use, the rack 3 drives the gear 4 to rotate, so that the gear 4 can drive the fixed rod 5 to rotate on the inner wall of the bottom plate 1, so that the fixed rod 5 can drive the first swing rod 6 to rotate on the inner wall of the bottom plate 1, preventing the first swing rod 6 and the fixed rod 5 from falling off, the first swing rod 6 drives the second swing rod 7 to rotate on the inner wall of the fixed rod 5, achieving linkage swing effect, so that the second swing rod 7 can drive the support plate 9 to achieve stable lifting effect, the protection box body 10 drives the slide rail 8 to be fixed, so that the slide rail 8 fixed on the upper surface of the bottom plate 1 can drive the support plate 9 to slide, achieving guiding effect while preventing the support plate 9 from falling off in use, and the support plate 9 can easily lift or lower the protection device to a height matched with the DC bus or other connection points in use, facilitating line connection and fixing operation of installers.

[0033] With reference to Figure 1 , Figure 3 and Figure 4The disassembling and assembling component comprises a T-shaped sheet 13, the lower surface of the T-shaped sheet 13 is fixedly connected to the upper surface of the supporting plate 9, the lower surface of the supporting plate 9 is fixedly connected with the first motor 12, the output end of the first motor 12 is fixedly arranged on the outer wall of the T-shaped sheet 13, the outer wall of the T-shaped sheet 13 is rotatably connected to the inner wall of the supporting plate 9, the outer wall of the T-shaped sheet 13 is rotatably connected to the inner wall of the limiting block 14, the upper surface of the T-shaped sheet 13 is rotatably connected with the connecting rod 15, the inner wall of the connecting rod 15 is rotatably connected with the push-pull block 16, the inner wall of the push-pull block 16 is rotatably connected with the connecting clamping block 18, the outer wall of the connecting clamping block 18 is slidably connected with the connecting block 20, the inner wall of the connecting block 20 is rotatably connected with the rotating lock 19, and the outer wall of the rotating lock 19 is slidably connected to the inner wall of the connecting clamping block 18.

[0034] Specifically, the first motor 12 is fixedly connected to the supporting plate 9, so that the T-shaped sheet 13 is driven to rotate on the inner wall of the limiting block 14, the supporting plate 9 is fixedly connected to the limiting block 14, so that the T-shaped sheet 13 is prevented from falling off, the connecting rod 15 is driven to swing by the T-shaped sheet 13, so that the push-pull block 16 is driven to stably slide to both sides, the connecting clamping block 18 is driven to rotate by the push-pull block 16, so that the connecting clamping block 18 is quickly clamped to the connecting block 20, the rotating lock 19 is driven to rotate by the connecting block 20, so that the rotating lock 19 is clamped to the connecting clamping block 18, and the connecting block 20 is prevented from falling off, and the connecting clamping block 18 is quickly disassembled and assembled to the connecting block 20, so that the installation time is shortened, and the transformer is conveniently disassembled and assembled.

[0035] With reference to Figure 4 and Figure 5 the outer wall of the push-pull block 16 is fixedly connected with the first lock block 21, the outer wall of the first lock block 21 is slidably connected to the inner wall of the connecting block 20, the right inner wall of the connecting block 20 is fixedly connected with the first spring 22, the outer wall of the first spring 22 is fixedly connected with the sliding block 23, the outer wall of the sliding block 23 is slidably connected to the inner wall of the connecting block 20, the outer wall of the sliding block 23 is slidably connected to the outer wall of the first lock block 21, the inner wall of the sliding block 23 is slidably connected with the second lock block 24, the outer wall of the second lock block 24 is fixedly connected with the transformer body 17, and the lower surface of the transformer body 17 is slidably connected to the inner wall of the protection box body 10.

[0036] Specifically, the first lock block 21 fixedly connected to the outer wall of the push-pull block 16 is slid to the inside of the connecting block 20, so that the first spring 22 fixedly connected to the connecting block 20 has the effect of stably sliding the sliding block 23 in the connecting block 20, the second lock block 24 fixedly connected to the outer wall of the transformer body 17 is clamped by the sliding block 23, so that the second lock block 24 is quickly installed and disassembled, and the protection equipment is quickly taken out.

[0037] With reference to Figure 6The inner wall of the protection box body 10 is fixedly connected with a left hollow rail 25, the inner wall of the left hollow rail 25 is fixedly connected with a second spring 26, the outer wall of the second spring 26 is fixedly connected with a rotating clamping block 28, the inner wall of the rotating clamping block 28 is fixedly connected with a sliding column 27, the outer wall of the rotating clamping block 28 is slidingly connected with the inner wall of the right hollow rail 25, the outer wall of the rotating clamping block 28 is rotatably connected with a hollow block 29, the right outer wall of the hollow block 29 is fixedly connected with the outer wall of the transformer body 17, and the inner wall of the hollow rail 25 is provided with a sliding column.

[0038] Specifically, the hollow block 29 fixedly connected with the transformer body 17 pushes the rotating clamping block 28, so that the rotating clamping block 28 drives the sliding column 27 to slide on the outer wall of the right hollow rail 25. In the use process, the sliding column 27 can slide on the outer wall of the hollow rail 25 while preventing the sliding column 27 from falling off. The left hollow rail 25 is fixedly connected with the inner wall of the protection box body 10, so that the hollow rail 25 can drive the second spring 26 to push the rotating clamping block 28. In the use process, the rotating clamping block 28 has a rotating effect while sliding in the hollow block 29. The sliding column fixedly connected with the left hollow rail 25 makes the second spring 26 drive the right hollow rail 25 to slide on the inner wall of the sliding column. In the use process, the hollow rail 25 has the effect of preventing the hollow rail 25 from falling off. The rotating clamping block 28 has the effects of quickly separating from the hollow block 29 and clamping the hollow block 29. In the use process, the installation process becomes simple and fast, and the downtime of the energy storage system is reduced.

[0039] Referring to Figure 7 The inner bottom wall of the protection box body 10 is fixedly connected with a limiting circular block 32, the upper surface of the limiting circular block 32 is fixedly connected with a second motor 30, the output end of the second motor 30 is fixedly provided with a connecting circular rod 31, the outer wall of the connecting circular rod 31 is rotatably connected with the inner wall of the limiting circular block 32, the inner bottom wall of the protection box body 10 is fixedly connected with a limiting column 33, the outer wall of the connecting circular rod 31 is rotatably connected with a first rotating rod 34, the inner wall of the first rotating rod 34 is rotatably connected with a rotating piece 35, the inner wall of the rotating piece 35 is rotatably connected with a fixed column 36, the outer wall of the fixed column 36 is fixedly connected with the inner bottom wall of the protection box body 10, the outer wall of the rotating piece 35 is rotatably connected with a second rotating rod 37, the inner wall of the second rotating rod 37 is rotatably connected with the protective door 11, and the outer wall of the protective door 11 is rotatably connected with the outer wall of the protection box body 10.

[0040] Specifically, the second motor 30 drives the connecting round rod 31 to rotate in the limiting circular block 32, so that the protection box body 10 drives the limiting column 33 to be fixed. In the use process, the limiting column 33 has the effect of limiting the connecting round rod 31. The connecting round rod 31 drives the first rotating rod 34 to swing, so that the first rotating rod 34 can drive the rotating plate 35 to rotate, and the rotating plate 35 can drive the second rotating rod 37 to realize the effect of linkage swing. The fixed column 36 fixed on the inner wall of the protection box body 10 makes the rotating plate 35 rotate on the outer wall of the fixed column 36, which has the effect of preventing the rotating plate 35 from falling off in the use process. The second rotating rod 37 drives the protection door 11 to rotate, so that the protection door 11 can rotate on the inner wall of the protection box body 10. The protection door 11 is quickly opened and closed to provide an operating space for maintenance personnel. In the closed state, the electrical elements can be effectively isolated from the outside to prevent foreign matters from entering the protection equipment, thereby reducing the risk of circuit short circuit.

[0041] When the device needs to be used, the second motor 30 drives the connecting round rod 31 to rotate, so that the connecting round rod 31 drives the first rotating rod 34 to swing, realizing the effect of linkage swing. The first rotating rod 34 drives the rotating plate 35 to rotate, so that the rotating plate 35 drives the second rotating rod 37 to rotate. In the process of use, the second rotating rod 37 can drive the protection door 11 to have the effect of stable opening and closing. After the protection door 11 is opened, the hydraulic cylinder 2 drives the rack 3 to slide, so that the rack 3 drives the gear 4 to rotate. In the process of use, the gear 4 can drive the fixed rod 5 and the first swing rod 6 fixed on the outer wall of the fixed rod 5 to rotate together on the inner wall of the bottom plate 1, having the effect of preventing falling. The first swing rod 6 drives the second swing rod 7 to rotate, so that the second swing rod 7 can drive the support plate 9 to have the effect of lifting. The slide rail 8 fixed on the bottom plate 1 drives the support plate 9 to slide, realizing the effect of guiding. After being lifted to a suitable height, the first motor 12 drives the T-shaped plate 13 to rotate, so that the T-shaped plate 13 can drive the connecting rod 15 to swing. In the process of use, the push-pull block 16 has the effect of stable sliding. The push-pull block 16 drives the connecting clamping block 18 to rotate, so that the connecting clamping block 18 has the effect of clamping the connecting block 20. The connecting block 20 drives the rotating lock 19 to rotate, so that the rotating lock 19 rotates on the inner wall of the connecting clamping block 18. In the process of use, the connecting block 20 has the effect of quick disassembly and assembly. The push-pull block 16 drives the first lock block 21 to slide on the inner wall of the connecting block 20, so that the first spring 22 can drive the sliding block 23 to clamp the first lock block 21 and the second lock block 24, realizing the effect of quick installation and disassembly of the second lock block 24. The transformer body 17 fixes the second lock block 24, so that the push-pull block 16 has the effect of quickly taking out and putting back the transformer body 17. The hollow block 29 fixed on the outer wall of the transformer body 17 slides on the outer wall of the rotating clamping block 28, having the effect of conveniently taking out the transformer body 17. After the transformer body 17 is put back, the rotating clamping block 28 drives the sliding column 27 to slide, so that the second spring 26 is compressed and then pops out. The sliding column 27 slides on the outer wall of the hollow rail 25, so that the rotating clamping block 28 has the effect of rotation. The rotating clamping block 28 clamps the hollow block 29, having the effect of preventing the transformer body 17 from falling off in the process of use. In the process of use, the support plate 9 can easily lift or lower the protection device to a height matched with the DC bus or other connection points, having the effect of facilitating the line connection and fixing operation of the installation personnel. The sliding block 23 and the rotating clamping block 28 realize the effect of quickly disassembling the protection device that fails to detect, and make the installation process simple and fast, reducing the downtime of the energy storage system. The second rotating rod 37 realizes the effect of quickly opening and closing to provide an operation space for the maintenance personnel, and in the closed state, the electrical elements can be effectively isolated from the outside to prevent foreign matters from entering the inside of the protection device, reducing the risk of circuit short circuit.

[0042] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A device for overcurrent protection of a DC side of an energy storage converter, characterized in that: The device is built-in bottom plate (1), the outer wall of the bottom plate (1) is fixedly connected with hydraulic cylinder (2), the output end of the hydraulic cylinder (2) is fixedly provided with rack (3), the lower surface of the rack (3) is slidably connected on the upper surface of the bottom plate (1), the tooth end of the rack (3) is engagedly connected with gear (4), the inner wall of the gear (4) is fixedly connected with fixed rod (5), the outer wall of the fixed rod (5) is rotatably connected with the inner wall of the bottom plate (1), the outer wall of the fixed rod (5) is fixedly connected with first swing rod (6), the outer wall of the first swing rod (6) is rotatably connected with the inner wall of the bottom plate (1), the outer wall of the first swing rod (6) is rotatably connected with second swing rod (7), the outer wall of the second swing rod (7) is rotatably connected with support plate (9), the inner wall of the support plate (9) is rotatably connected with the outer wall of the fixed rod (5), the outer wall of the support plate (9) is slidably connected with slide rail (8), the lower surface of the slide rail (8) is fixedly connected with the upper surface of the bottom plate (1), the upper surface of the support plate (9) is provided with dismounting assembly, and the dismounting assembly is used for dismounting the converter.

2. The overcurrent protection device for the DC side of an energy storage converter according to claim 1, characterized in that: The dismounting assembly comprises T-shaped sheet (13), the lower surface of the T-shaped sheet (13) is fixedly connected with the upper surface of the support plate (9), the lower surface of the support plate (9) is fixedly connected with first motor (12), the output end of the first motor (12) is fixedly arranged on the outer wall of the T-shaped sheet (13), the outer wall of the T-shaped sheet (13) is rotatably connected with the inner wall of the support plate (9), and the outer wall of the T-shaped sheet (13) is rotatably connected with limiting block (14).

3. The energy storage inverter DC side overcurrent protection device of claim 2, wherein: The upper surface of the T-shaped sheet (13) is rotatably connected with connecting rod (15), the inner wall of the connecting rod (15) is rotatably connected with push-pull block (16), the inner wall of the push-pull block (16) is rotatably connected with connecting clamping block (18), the outer wall of the connecting clamping block (18) is slidably connected with connecting block (20), the inner wall of the connecting block (20) is rotatably connected with rotating lock (19), and the outer wall of the rotating lock (19) is slidably connected with the inner wall of the connecting clamping block (18).

4. The energy storage inverter DC side overcurrent protection device of claim 3, wherein: The outer wall of the push-pull block (16) is fixedly connected with first lock block (21), the outer wall of the first lock block (21) is slidably connected with the inner wall of the connecting block (20), the right inner wall of the connecting block (20) is fixedly connected with first spring (22), the outer wall of the first spring (22) is fixedly connected with sliding block (23), and the outer wall of the sliding block (23) is slidably connected with the inner wall of the connecting block (20).

5. The energy storage inverter DC side overcurrent protection device of claim 4, wherein: The outer wall of the sliding block (23) is slidably connected with the outer wall of the first lock block (21), the inner wall of the sliding block (23) is slidably connected with second lock block (24), the outer wall of the second lock block (24) is fixedly connected with transformer body (17), and the lower surface of the transformer body (17) is slidably connected with the inner wall of protection box body (10).

6. The energy storage inverter DC side overcurrent protection device of claim 5, wherein: The inner wall of the protection box body (10) is fixedly connected with a left hollow rail (25), the inner wall of the left hollow rail (25) is fixedly connected with a second spring (26), the outer wall of the second spring (26) is fixedly connected with a rotating clamping block (28), and the inner wall of the rotating clamping block (28) is fixedly connected with a sliding column (27).

7. The energy storage inverter DC side overcurrent protection device of claim 6, wherein: The outer wall of the rotating clamping block (28) is slidably connected to the inner wall of the right hollow rail (25), the outer wall of the rotating clamping block (28) is rotatably connected with a hollow block (29), the right outer wall of the hollow block (29) is fixedly connected to the outer wall of the transformer body (17), the inner wall of the hollow rail (25) is provided with a sliding column, the outer wall of the sliding column is slidably connected to the inner wall of the right hollow rail (25), and the outer wall of the sliding column is fixedly connected to the inner wall of the left hollow rail (25).

8. The energy storage inverter DC side overcurrent protection device of claim 7, wherein: The inner bottom wall of the protection box body (10) is fixedly connected with a limiting circular block (32), the upper surface of the limiting circular block (32) is fixedly connected with a second motor (30), the output end of the second motor (30) is fixedly provided with a connecting circular rod (31), the outer wall of the connecting circular rod (31) is rotatably connected to the inner wall of the limiting circular block (32), and the inner bottom wall of the protection box body (10) is fixedly connected with a limiting column (33).

9. The energy storage inverter DC side overcurrent protection device of claim 8, wherein: The outer wall of the connecting circular rod (31) is rotatably connected with a first rotating rod (34), the inner wall of the first rotating rod (34) is rotatably connected with a rotating piece (35), the inner wall of the rotating piece (35) is rotatably connected with a fixed column (36), and the outer wall of the fixed column (36) is fixedly connected to the inner bottom wall of the protection box body (10).

10. The energy storage inverter DC side overcurrent protection device of claim 9, wherein: The outer wall of the rotating piece (35) is rotatably connected with a second rotating rod (37), the inner wall of the second rotating rod (37) is rotatably connected with a protective door (11), and the outer wall of the protective door (11) is rotatably connected to the outer wall of the protection box body (10).

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