energy storage device

Abstract

This invention provides an energy storage device comprising: a movable hydraulic cylinder having a fixed fixed cylinder body and a telescopic cylinder body capable of moving axially relative to the fixed cylinder body, wherein hydraulic fluid is present in a cavity defined by the fixed cylinder body and the telescopic cylinder body; a first cylinder located on one axial side of the movable hydraulic cylinder, one end of the piston rod of the first cylinder being connected to the telescopic cylinder body of the movable hydraulic cylinder; a first transverse hydraulic cylinder fixed to one side of the telescopic cylinder body of the movable hydraulic cylinder and communicating with the cavity of the movable hydraulic cylinder; a second transverse hydraulic cylinder having an internally provided piston connecting rod capable of extending and retracting within the second transverse hydraulic cylinder, the piston connecting rod being connected to a piston within the first transverse hydraulic cylinder; a first high-pressure vessel communicating with the second transverse hydraulic cylinder; a first hydraulic motor; and a first generator.

Description

Technical Field

[0001] This invention belongs to the field of energy storage technology, and more specifically, this invention relates to energy storage devices. Background Technology

[0002] Energy storage devices are widely used in industry to convert electrical energy into other easily storable forms of energy when the power supply is normal, and to generate electricity to enable equipment to continue operating or to ensure a continuous power supply to critical equipment when the power supply is interrupted. A representative type of energy storage technology is inertial energy storage.

[0003] Inertial energy storage utilizes the kinetic energy of an object in motion to store energy. Currently, a common method for inertial energy storage is using flywheels. The basic principle is that when the power supply is normal, an electric motor mechanically connected to the flywheel drives it to rotate rapidly, converting electrical energy into the flywheel's rotational kinetic energy for storage. When, for example, the power supply is interrupted and a power supply is needed, the rotating flywheel drives a generator mechanically connected to it to generate electricity. During this process, the flywheel decelerates, thereby converting the stored kinetic energy into electrical energy for external output. In this process, the acceleration and deceleration of the flywheel achieves both energy storage and utilization.

[0004] The problem with this technology of using flywheels for inertial energy storage is that, since the flywheel is a solid structure, the efficiency of energy conversion cannot be adjusted and controlled during the acceleration and deceleration of the flywheel, and the efficiency of storing or releasing energy cannot be further improved. Summary of the Invention

[0005] In view of the problems existing in traditional inertial energy storage technology, one object of the present invention is to provide an energy storage device that can improve energy conversion efficiency.

[0006] In one aspect of the present invention, an energy storage device is provided, the energy storage device comprising:

[0007] A movable hydraulic cylinder having a fixed cylinder body and a telescopic cylinder body capable of moving axially relative to the fixed cylinder body, wherein hydraulic fluid is contained within a cavity defined by the fixed cylinder body and the telescopic cylinder body.

[0008] The first cylinder is located on one axial side of the movable hydraulic cylinder, and one end of the piston rod of the first cylinder points towards the telescopic cylinder body of the movable hydraulic cylinder;

[0009] The first horizontally positioned hydraulic cylinder is fixed to one side of the telescopic cylinder body of the movable hydraulic cylinder and communicates with the chamber of the movable hydraulic cylinder.

[0010] The second horizontal hydraulic cylinder has a piston connecting rod that can extend and retract within the second horizontal hydraulic cylinder, and the piston connecting rod is connected to the piston in the first horizontal hydraulic cylinder.

[0011] The first high-pressure vessel is connected to the second horizontally positioned hydraulic cylinder;

[0012] A first hydraulic motor is connected to the first high-pressure vessel and can be driven by high-pressure fluid inside the first high-pressure vessel;

[0013] A first generator is connected to the first hydraulic motor and can generate electricity by being driven by the first hydraulic motor.

[0014] According to one embodiment, one end of the piston rod of the first cylinder that points toward the telescopic cylinder body of the movable hydraulic cylinder is connected to or in contact with the telescopic cylinder body of the movable hydraulic cylinder.

[0015] According to one embodiment, the energy storage device also has a first high-pressure gas source connected to the first cylinder.

[0016] According to one embodiment, the energy storage device further includes a second cylinder located on the opposite axial side of the movable hydraulic cylinder to the first cylinder, and one end of the piston rod of the second cylinder is capable of contacting or separating from the telescopic cylinder body of the movable hydraulic cylinder.

[0017] According to one embodiment, the energy storage device further includes a second cylinder located on the opposite axial side of the movable hydraulic cylinder to the first cylinder, and one end of the piston rod of the second cylinder is connectable to the telescopic cylinder body of the movable hydraulic cylinder.

[0018] According to one embodiment, the energy storage device further comprises:

[0019] A third horizontally positioned hydraulic cylinder is fixed to the opposite side of the telescopic cylinder body of the movable hydraulic cylinder, opposite to the first horizontally positioned hydraulic cylinder, and communicates with the chamber of the movable hydraulic cylinder.

[0020] The fourth horizontal hydraulic cylinder has a piston connecting rod that can extend and retract within the cylinder, and the piston connecting rod is connected to the piston in the third horizontal hydraulic cylinder.

[0021] The second high-pressure vessel is connected to the fourth horizontally positioned hydraulic cylinder;

[0022] A second hydraulic motor is connected to the second high-pressure vessel and can be driven by high-pressure fluid inside the second high-pressure vessel;

[0023] The second generator is connected to the second hydraulic motor and can generate electricity by being driven by the second hydraulic motor.

[0024] According to one embodiment, the energy storage device also has a second high-pressure gas source connected to the second cylinder.

[0025] According to one embodiment, the telescopic cylinder body includes a first telescopic cylinder body and a second telescopic cylinder body that are opposed to each other and are connected as one unit.

[0026] According to one embodiment, the energy storage device also has a reset mechanism for resetting the position of the piston of the second cylinder.

[0027] According to one embodiment, the second transverse hydraulic cylinder is connected to the first high-pressure vessel via a first check valve; and the fourth transverse hydraulic cylinder is connected to the second high-pressure vessel via a second check valve.

[0028] According to one embodiment, the energy storage device further comprises: a first low-pressure container connected to the first high-pressure container via the first hydraulic motor, the first low-pressure container being connected to the second transverse hydraulic cylinder via a third check valve.

[0029] According to one embodiment, the energy storage device further comprises: a second low-pressure container connected to the second high-pressure container via the second hydraulic motor, the second low-pressure container being connected to the fourth transverse hydraulic cylinder via a fourth check valve.

[0030] According to one embodiment, one end of the piston rod of the second cylinder can be connected to the telescopic cylinder body of the movable hydraulic cylinder via a folding connection mechanism. Attached Figure Description

[0031] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

[0032] Figure 1 This is a schematic diagram of the structure of an energy storage device according to an embodiment of the present invention.

[0033] Figures 2 to 6 This is a schematic diagram of the working state of an energy storage device according to an embodiment of the present invention.

[0034] Figure 7 and Figure 8 This is a schematic diagram of the internal structure of the second cylinder of an energy storage device according to another embodiment of the present invention.

[0035] Figure 9 This is a schematic diagram of the locking mechanism and reset mechanism of an energy storage device according to an embodiment of the present invention.

[0036] Figure 10 This is a schematic diagram of the cross-sectional structure of the fixed cylinder and the cooling system of an energy storage device according to another embodiment of the present invention.

[0037] Figure 11 This is a schematic diagram of a coolant radiator and a cooling fan of an energy storage device according to another embodiment of the present invention.

[0038] Figure 12 This is a top view of the folding connection mechanism in the folded state.

[0039] Figure 13 This is a top view of the folding connection mechanism in its unfolded state.

[0040] Figure 14 This is a side view of the folding connection mechanism in its unfolded state.

[0041] Figure 15 This is a structural schematic diagram of a rigid movable pipeline.

[0042] Figure 16 This is a side view of a rigid moving pipeline.

[0043] Figures 17 to 19 This is a schematic diagram of the internal structure of the fixed cylinder of an energy storage device according to another embodiment of the present invention.

[0044] Explanation of key figure labels:

[0045] 1. Fixed cylinder body

[0046] 2. Third horizontal hydraulic cylinder 3. First horizontally positioned hydraulic cylinder 4. Second piston connecting rod

[0047] 5. Third Piston

[0048] 6. Fourth Piston

[0049] 7. Fourth check valve

[0050] 8. Second check valve

[0051] 9. Second hydraulic motor

[0052] 10. Second generator

[0053] 11. Second Low-Pressure Vessel

[0054] 12. Second High-Pressure Vessel

[0055] 13. Slider

[0056] 14. Slide rail

[0057] 15. Base

[0058] 16. Second cylinder

[0059] 17. First cylinder

[0060] 18. Second pneumatic piston

[0061] 19. Second piston rod

[0062] 20. First piston rod

[0063] 21. Vacuum cavity

[0064] 22. Guide rod

[0065] 23. Crankshaft connecting rod

[0066] 24. Electric motor

[0067] 25. Crankshaft

[0068] 26. Second gas storage container

[0069] 27. First gas storage container

[0070] 28. Second electric air compressor

[0071] 29. Valves

[0072] 30. Sealing ring

[0073] 31. Second telescopic cylinder body

[0074] 32. Fixed rod

[0075] 33. First telescopic cylinder body

[0076] 34. Hydraulic fluid

[0077] 35. Fourth transverse hydraulic cylinder

[0078] 36. Second transverse hydraulic cylinder

[0079] 37. First piston

[0080] 38. Second piston

[0081] 39. Third check valve

[0082] 40. First check valve

[0083] 41. First low-pressure vessel

[0084] 42. First High-Pressure Vessel

[0085] 43. First hydraulic motor

[0086] 44. First generator

[0087] 45. First pneumatic piston

[0088] 46. ​​First piston connecting rod

[0089] 47. Second oil circuit

[0090] 48. First oil line

[0091] 49. Second pipeline

[0092] 50. First pipeline

[0093] 51. First electric air compressor

[0094] 52. Third valve

[0095] 53. Second valve

[0096] 54. Stop ring

[0097] 55. Annular piston

[0098] 56. Brake disc

[0099] 57. Brake calipers

[0100] 58. The outer wall of the fixed cylinder block

[0101] 59. The inner wall of the fixed cylinder block

[0102] 60. Mezzanine

[0103] 61. Isolation wall

[0104] 62. Coolant outlet

[0105] 63. Coolant Inlet

[0106] 64. Circulating cooling pump

[0107] 65. Coolant circulation piping

[0108] 66. Coolant radiator

[0109] 67. Cooling fan

[0110] 68. Lateral support arm

[0111] 69. First swing arm

[0112] 70. Second swing arm

[0113] 71. Connector

[0114] 72. First connecting bearing

[0115] 73. Second connecting bearing

[0116] 74. Third connecting bearing

[0117] 75. Touch switch

[0118] 76. Torsion spring

[0119] 77. First rigid pipeline

[0120] 78. Second rigid piping

[0121] 79. First Interface

[0122] 80. First rotary sealing interface

[0123] 81. Second rotary sealing interface

[0124] 82. Third rotary sealing interface

[0125] 83. Second Interface

[0126] 84. Supporting wall

[0127] 85. Orifice

[0128] 86. Curved convex structure Detailed Implementation

[0129] The present invention will be further described below with reference to the accompanying drawings and some specific embodiments.

[0130] One embodiment of the present invention provides an energy storage device. (See reference...) Figure 1The energy storage device includes a movable hydraulic cylinder. The movable hydraulic cylinder includes a fixed cylinder body 1 and a telescopic cylinder body capable of axial movement relative to the fixed cylinder body 1. The fixed cylinder body 1 can be a cylindrical shape open at both ends. The first telescopic cylinder body 33 and the second telescopic cylinder body 31 are cylindrical shapes closed at one end and open at the other. The first telescopic cylinder body 33 and the second telescopic cylinder body 31 are inserted into the fixed cylinder body 1 from one end and are capable of axial movement. Hereinafter, without distinguishing between the first telescopic cylinder body 33 and the second telescopic cylinder body 31, they will sometimes be collectively referred to as telescopic cylinders. Hydraulic fluid is contained within the cavity defined by the fixed cylinder body 1 and the telescopic cylinder body. That is, the first telescopic cylinder body 33 and the second telescopic cylinder body 31, which can extend and retract horizontally, are respectively provided at the ports at both ends of the fixed cylinder body 1. The fixed cylinder body 1 is located between the first telescopic cylinder body 33 and the second telescopic cylinder body 31, and the closed ends of the first telescopic cylinder body 33 and the second telescopic cylinder body 31 are located outside the ports of the fixed cylinder body 1. The first telescopic cylinder 33 and the second telescopic cylinder 31 are connected by a fixing rod 32. The fixing cylinder 1 is horizontally fixed on the base 15, and a slider 13 is provided below the first telescopic cylinder 33 and the second telescopic cylinder 31. The slider 13 is mounted on the base 15 via a slide rail 14. A sealing ring 30 may be provided between the inner wall of the fixing cylinder 1 and the outer wall of the first telescopic cylinder 33, and a sealing ring 30 may also be provided between the inner wall of the fixing cylinder 1 and the outer wall of the second telescopic cylinder 31.

[0131] A first horizontal hydraulic cylinder 3 is provided on the first telescopic cylinder body 33, which is parallel to the first telescopic cylinder body 33 and is connected to the first telescopic cylinder body 33. A third horizontal hydraulic cylinder 2 is provided on the second telescopic cylinder body 31, which is parallel to the second telescopic cylinder body 31 and is connected to the second telescopic cylinder body 31.

[0132] A second horizontal hydraulic cylinder 36 parallel to the first telescopic cylinder 33 is provided on the first horizontal hydraulic cylinder 3, and a fourth horizontal hydraulic cylinder 35 parallel to the second telescopic cylinder 31 is provided on the third horizontal hydraulic cylinder 2. The second horizontal hydraulic cylinder 36 and the fourth horizontal hydraulic cylinder 35 are located between the first horizontal hydraulic cylinder 3 and the third horizontal hydraulic cylinder 2.

[0133] A first piston 37 is provided in the first horizontal hydraulic cylinder 3, and a second piston 38 is provided in the second horizontal hydraulic cylinder 36. The first piston 37 is connected to the second piston 38 through the first piston connecting rod 46. A third piston 5 is provided in the third horizontal hydraulic cylinder 2, and a fourth piston 6 is provided in the fourth horizontal hydraulic cylinder 35. The third piston 5 is connected to the fourth piston 6 through the second piston connecting rod 4.

[0134] A first check valve 40 and a third check valve 39 are provided on the second horizontal hydraulic cylinder 36. The third check valve 39 is connected to the first low-pressure container 41 through a low-pressure flexible pipeline. The first check valve 40 is connected to the first high-pressure container 42 through a high-pressure flexible pipeline. The first low-pressure container 41 is connected to the first high-pressure container 42 through a first oil passage 48. A first hydraulic motor 43 is provided on the first oil passage 48. The first hydraulic motor 43 is driven by the first generator 44.

[0135] A second check valve 8 and a fourth check valve 7 are provided on the fourth horizontal hydraulic cylinder 35. The fourth check valve 7 is connected to the second low-pressure vessel 11 through a low-pressure flexible pipeline. The second check valve 8 is connected to the second high-pressure vessel 12 through a high-pressure flexible pipeline. The second low-pressure vessel 11 is connected to the second high-pressure vessel 12 through the second oil circuit 47. A second hydraulic motor 9 is provided on the second oil circuit 47. The second hydraulic motor 9 is driven by the second generator 10.

[0136] A first cylinder 17 is provided on one side of the closed end of the first telescopic cylinder 33. The closed end of the first telescopic cylinder 33 is located between the first cylinder 17 and the fixed cylinder 1. The first cylinder 17 is fixed on the base 15 and is connected to a first high-pressure air source through a first pipeline 50. The first high-pressure air source is used to provide high-pressure air. As shown in the figure, the first high-pressure air source may include a first electric air compressor 51 and a first air storage container 27. The volume of the first cylinder 17 may be smaller than the volume of the first air storage container 27, for example, the volume of the first cylinder 17 may be less than 1% of the volume of the first air storage container 27.

[0137] A first pneumatic piston 45 is provided inside the first cylinder 17. A first piston rod 20 is provided on the piston surface of the first pneumatic piston 45, pointing towards the closed end of the first telescopic cylinder 33. The first piston rod 20 is connected to or in contact with the closed end of the first telescopic cylinder 33.

[0138] A second cylinder 16 is provided on one side of the closed end of the second telescopic cylinder body 31. The closed end of the second telescopic cylinder body 31 is located between the second cylinder 16 and the fixed cylinder body 1. The second cylinder 16 is fixed on the base 15 and is connected to a second high-pressure air source through a second pipeline 49. The second high-pressure air source is used to provide high-pressure air. As shown in the figure, the second high-pressure air source may include a second electric air compressor 28 and a second air storage container 26. The volume of the second cylinder 16 may be smaller than the volume of the second air storage container 26, for example, the volume of the second cylinder 16 may be less than 1% of the volume of the second air storage container 26.

[0139] A second pneumatic piston 18 is provided inside the second cylinder 16. A second piston rod 19 is provided on the piston surface of the second pneumatic piston 18, pointing towards the closed end of the second telescopic cylinder 31. One end of the second piston rod 19 can contact or separate from the closed end of the second telescopic cylinder 31, and the second piston rod 19 extends out of the second cylinder 16.

[0140] The length of the first cylinder 17 can be greater than that of the second cylinder 16, and the length of the first piston rod 20 can be greater than that of the second piston rod 19. The bore of the first cylinder 17 can be the same as that of the second cylinder 16.

[0141] Optionally, a vacuum cavity 21 with an orifice may be provided on the outer wall of the closed end of the second telescopic cylinder 31. The second piston rod 19 is inserted into the vacuum cavity 21 through the orifice of the vacuum cavity 21, and sound insulation cotton may be covered on the inner wall of the vacuum cavity 21.

[0142] Hydraulic fluid 34 is contained in the cavity defined by the first telescopic cylinder 33, the fixed cylinder 1, the second telescopic cylinder 31, the first horizontal hydraulic cylinder 3, and the third horizontal hydraulic cylinder 2.

[0143] A second valve 53 is provided on the first oil passage 48 between the first high-pressure vessel 42 and the first hydraulic motor 43.

[0144] A third valve 52 is provided on the second oil passage 47 between the second high-pressure vessel 12 and the second hydraulic motor 9.

[0145] Compressed air is filled into the first air storage container 27, the first pipeline 50, and the first cylinder 17.

[0146] The first low-pressure container 41 contains low-pressure gas and hydraulic fluid 34.

[0147] The second low-pressure container 11 contains low-pressure gas and hydraulic fluid 34.

[0148] The first high-pressure vessel 42 contains high-pressure gas and hydraulic fluid 34.

[0149] The second high-pressure vessel 12 contains high-pressure gas and hydraulic fluid 34.

[0150] The hydraulic fluid 34 can be engine oil or hydraulic oil.

[0151] The first low-pressure container 41, the second low-pressure container 11, the first high-pressure container 42, and the second high-pressure container 12 may each be provided with a rubber diaphragm for separating gas and hydraulic fluid 34.

[0152] Optionally, the energy storage device may also have a reset mechanism for repositioning the second pneumatic piston 18 within the second cylinder 16. This reset mechanism is connected to the second pneumatic piston 18 via a guide rod 22. As an illustrative example, the reset mechanism may include a crankshaft connecting rod 23, a motor 24, and a crankshaft 25. The motor 24 may be any suitable motor selected depending on the application, such as an AC motor, stepper motor, servo motor, etc. During operation, the reset mechanism may also lock the position of the second pneumatic piston 18 within the second cylinder 16.

[0153] The guide rod 22 can be disposed on the other piston surface of the second pneumatic piston 18. The guide rod 22 extends out of the second cylinder 16 through the orifice at the end of the second cylinder 16 in the opposite direction to the direction of the fixed cylinder body 1. The motor 24 is disposed on one side of the second cylinder 16, and the second cylinder 16 is located between the motor 24 and the closed end of the second telescopic cylinder body 31. The output shaft of the motor 24 is connected to the crankshaft 25 through a one-way bearing. The crankshaft 25 is movably connected to the guide rod 22 through the crankshaft connecting rod 23.

[0154] The following will refer to Figures 2 to 6 The method of using the energy storage device according to the above embodiments of the present invention and its working principle are described in detail.

[0155] refer to Figure 2 When power is available, valves 29, 53, and 52 are closed. After closing valves 29, 53, and 52, the second electric air compressor 28 is turned on to charge the second air storage container 26. When the air pressure in the second air storage container 26 reaches a specified pressure, for example, when the air pressure in the second air storage container 26 reaches more than twice the air pressure in the first cylinder 17, the second electric air compressor 28 is turned off.

[0156] refer to Figure 3 After shutting down the second electric air compressor 28, valve 29 is opened. When valve 29 opens, compressed air from the second air storage container 26 instantly enters the second cylinder 16. Since the air pressure in the second air storage container 26 is greater than the air pressure in the first cylinder 17, the second pneumatic piston 18, driven by the air pressure in the second air storage container 26, pushes the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 towards the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 through the second piston rod 19. Figure 3 The arrow in the diagram indicates an accelerated movement, causing the hydraulic fluid 34 within the cavity defined by the second telescopic cylinder 31, the fixed cylinder 1, the first telescopic cylinder 33, the first transverse hydraulic cylinder 3, and the third transverse hydraulic cylinder 2 to accelerate. For example... Figure 3 As shown, the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 are aligned with... Figure 3 During the acceleration process in the direction indicated by the arrow, the pressure of the hydraulic fluid 34 inside the second telescopic cylinder 31 increases under the action of acceleration. Therefore, the pressure of the hydraulic fluid 34 in the second telescopic cylinder 31, fixed rod 32, first telescopic cylinder 33, first piston rod 20, and first pneumatic piston 45 increases. Figure 3 During the acceleration process in the direction indicated by the arrow, the pressure of the hydraulic fluid 34 inside the second telescopic cylinder 31 propels the object towards the target. Figure 3 The arrow in the diagram points to the third piston 5, which, through the second piston connecting rod 4 and the fourth piston 6, pushes the hydraulic fluid 34 in the fourth horizontal hydraulic cylinder 35 into the second high-pressure container 12 via the second one-way valve 8 and the high-pressure flexible pipeline. During the process of the hydraulic fluid 34 in the fourth horizontal hydraulic cylinder 35 being pushed into the second high-pressure container 12, the fourth one-way valve 7 closes. The second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move in the direction indicated by the arrow. Figure 3 During the acceleration process indicated by the arrow, the hydraulic fluid 34 in the first low-pressure container 41, driven by the pressure of the low-pressure gas in the first low-pressure container 41, enters the second horizontal hydraulic cylinder 36 through the low-pressure flexible pipeline and the third one-way valve 39. The hydraulic fluid 34 entering the second horizontal hydraulic cylinder 36 then... Figure 3 The arrows in the diagram indicate the direction that pushes the second piston 38, the first piston connecting rod 46, and the first piston 37.

[0157] like Figure 3 As shown, when the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move towards... Figure 3 The arrow in the middle indicates that the movement is accelerating to... Figure 3 At the position shown in the diagram, the second pneumatic piston 18 reaches the acceleration dead center. (As shown in the diagram...) Figure 4 As shown, when the second pneumatic piston 18 reaches the acceleration dead center, the second piston rod 19 separates from the closed end of the second telescopic cylinder 31. Figure 4 As shown, when the second piston rod 19 separates from the closed end of the second telescopic cylinder 31, the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move towards the first cylinder 17 under the air pressure resistance. Figure 4 The arrow in the image indicates deceleration; once deceleration stops, as shown... Figure 5 As shown, the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 are driven by the air pressure in the first cylinder 17. Figure 5 The direction indicated by the arrow in the image is accelerating.

[0158] The second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 are aligned. Figure 4 During the deceleration process in the direction indicated by the arrow, and in the direction of the second telescopic cylinder 31, fixed rod 32, first telescopic cylinder 33, first piston rod 20, and first pneumatic piston 45... Figure 5 During acceleration in the direction indicated by the arrow, the pressure of the hydraulic fluid 34 within the first telescopic cylinder 33 increases under the action of acceleration. Therefore, the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move in the direction indicated by the arrow. Figure 4 During the deceleration process in the direction indicated by the arrow, and in the direction of the second telescopic cylinder 31, fixed rod 32, first telescopic cylinder 33, first piston rod 20, and first pneumatic piston 45... Figure 5 During the acceleration process in the direction indicated by the arrow, the pressure of the hydraulic fluid 34 inside the first telescopic cylinder 33 propels the fluid towards the target. Figure 5 The arrow in the diagram points to the first piston 37, which, through the first piston connecting rod 46 and the second piston 38, pushes the hydraulic fluid 34 in the second horizontal hydraulic cylinder 36 into the first high-pressure container 42 via the first check valve 40 and the high-pressure flexible pipeline. During the process of the hydraulic fluid 34 in the second horizontal hydraulic cylinder 36 being pushed into the first high-pressure container 42, the third check valve 39 closes. Specifically, the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move in the direction indicated by the arrow. Figure 4 During the deceleration process in the direction indicated by the arrow, and in the direction of the second telescopic cylinder 31, fixed rod 32, first telescopic cylinder 33, first piston rod 20, and first pneumatic piston 45... Figure 5 During the acceleration process indicated by the arrow, the hydraulic fluid 34 in the second low-pressure container 11, driven by the pressure of the low-pressure gas in the second low-pressure container 11, enters the fourth horizontal hydraulic cylinder 35 through the low-pressure flexible pipeline and the fourth one-way valve 7. The hydraulic fluid 34 entering the fourth horizontal hydraulic cylinder 35 then... Figure 5 The arrows in the diagram indicate the direction that pushes the fourth piston 6, the second piston connecting rod 4, and the third piston 5.

[0159] refer to Figure 5 When the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move towards Figure 5 The arrow in the middle indicates that the movement is accelerating to... Figure 5 When in the position shown, the closed end of the second telescopic cylinder 31 is in contact with the second piston rod 19. At this time, the second cylinder 16 can also reduce the impact force on the second piston rod 19, which will be explained in detail below.

[0160] refer to Figure 6When the closed end of the second telescopic cylinder 31 contacts the second piston rod 19, the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move towards the second cylinder 16 under the air pressure resistance. Figure 6 The arrow in the image indicates deceleration. For example... Figure 6 As shown, the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 are aligned with... Figure 6 During the deceleration process in the direction indicated by the arrow, the pressure of the hydraulic fluid 34 inside the second telescopic cylinder 31 increases under the action of acceleration. Therefore, the pressure of the fluid increases in the direction of acceleration. Figure 6 During the deceleration process in the direction indicated by the arrow, the hydraulic fluid 34 inside the second telescopic cylinder 31 pressurizes the airflow. Figure 6 The third piston 5 is pushed in the opposite direction of the arrow in the diagram. The third piston 5, through the second piston connecting rod 4 and the fourth piston 6, again forces the hydraulic fluid 34 in the fourth horizontal hydraulic cylinder 35 into the second high-pressure container 12 via the second one-way valve 8 and the high-pressure flexible pipeline. During the process of the hydraulic fluid 34 in the fourth horizontal hydraulic cylinder 35 being forced back into the second high-pressure container 12, the fourth one-way valve 7 closes. The second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move in opposite directions. Figure 6 During the deceleration process in the direction indicated by the arrow, the hydraulic fluid 34 in the first low-pressure container 41, driven by the pressure of the low-pressure gas in the first low-pressure container 41, enters the second horizontal hydraulic cylinder 36 through the low-pressure flexible pipeline and the third one-way valve 39. The hydraulic fluid 34 entering the second horizontal hydraulic cylinder 36 then... Figure 6 The arrows in the diagram push the second piston 38, the first piston connecting rod 46, and the first piston 37 in the opposite direction.

[0161] In the direction of the second telescopic cylinder 31 Figure 3 During the acceleration process indicated by the arrow, the second pneumatic piston 18 drives the crankshaft 25 to rotate clockwise via the guide rod 22 and crankshaft connecting rod 23. At this time, the crankshaft 25 and the one-way bearing are in an unlocked state. When the second telescopic cylinder 31 moves towards... Figure 6 When decelerating in the direction indicated by the arrow, motor 24 is activated, driving crankshaft 25 to rotate clockwise. At this time, crankshaft 25 is locked to the one-way bearing. The second pneumatic piston 18, driven by motor 24, crankshaft 25, crankshaft connecting rod 23, and guide rod 22, moves towards... Figure 6 The arrow points in the middle and moves in the direction of the second pneumatic piston 18. When the second pneumatic piston 18 reaches the desired position under the drive of the motor 24, crankshaft 25, crankshaft connecting rod 23, and guide rod 22... Figure 6After reaching the position shown in the diagram, the motor 24 is turned off. The process described above, in which the second pneumatic piston 18 moves under the drive of the motor 24, crankshaft 25, crankshaft connecting rod 23, and guide rod 22, can be referred to as the reset process of the second pneumatic piston 18. It is understood that, in addition to the crankshaft connecting rod 23, motor 24, and crankshaft 25, the reset mechanism may also include a locking mechanism. After the reset process is completed, the locking mechanism can be used to lock the second pneumatic piston 18 in the position shown in the diagram. Figure 6 The position shown in the diagram.

[0162] In another embodiment, when the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move towards... Figure 3 When the movement accelerates in the direction indicated by the arrow, motor 24 can also be activated. This allows motor 24 to generate thrust on the second telescopic cylinder 31, fixed rod 32, first telescopic cylinder 33, first piston rod 20, and first pneumatic piston 45, thereby increasing the kinetic energy of these components. When the second pneumatic piston 18 reaches its destination under the driving action of motor 24, crankshaft 25, crankshaft connecting rod 23, and guide rod 22... Figure 6 After reaching the position shown in the diagram, turn off motor 24.

[0163] like Figure 9 As shown, the locking mechanism can be a brake, which may include a brake disc 56 mounted on the output shaft of a motor 24 driven by the crankshaft 25, and a brake caliper 57 with brake pads internally mounted and fixedly connected to the base 15. When the second pneumatic piston 18 reaches the desired position under the driving action of the motor 24, crankshaft 25, crankshaft connecting rod 23, and guide rod 22... Figure 6 After reaching the position shown in the diagram, braking force can be applied to the brake disc 56 via the brake caliper 57 and brake pads to lock the second pneumatic piston 18 in place. Figure 6 The location shown in the diagram. Of course, the locking mechanism may also include, in addition to... Figure 9 Other components besides the brake disc 56 and brake caliper 57 shown.

[0164] As mentioned above, in Figure 6 After the operation shown, the second pneumatic piston 18 can be reset and locked using the reset and locking mechanisms. Figure 6 The location shown. Of course, after completing one... Figures 3 to 6 After the operation, the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 can be repeated as needed. Figures 3 to 6 The operation needs to be repeated multiple times. Figures 3 to 6Under normal operating conditions, motor 24 remains in the open state. In this state, the locking mechanism does not lock the second pneumatic piston 18, but only locks it at the end of the last repeated operation. Figure 6 As shown in the diagram, with the repeated reciprocating motion of the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45, the hydraulic fluid 34 will generate heat under the action of high-speed flow. In this case, a cooling system can be installed in the energy storage device.

[0165] Figure 10 A cross-sectional structure of the fixed cylinder body and a cooling system of an energy storage device according to another embodiment of the present invention are shown. An interlayer 60 is formed between the outer wall 58 and the inner wall 59 of the fixed cylinder body 1. An isolation wall 61 is also provided in the interlayer 60 to promote uniform flow of coolant within the interlayer 60. A coolant outlet 62 and a coolant inlet 63 are provided on the outer wall 58 of the fixed cylinder body 1, and the isolation wall 61 is located between the coolant outlet 62 and the coolant inlet 63. Coolant enters the interlayer 60 through the coolant inlet 63 and flows out of the interlayer 60 through the coolant outlet 62. The coolant outlet 62 is connected to the coolant inlet 63 via a coolant circulation pipe 65, on which a circulating cooling pump 64 and a coolant radiator 66 are provided. The circulating cooling pump 64 drives the coolant flow when cooling the hydraulic fluid 34. The coolant radiator 66 dissipates heat from the coolant as it flows in the coolant circulation pipe 65. The coolant radiator 66 may also be surrounded by any number of cooling fans arranged in any manner to dissipate heat from the coolant radiator 66. As an example, Figure 11 A cooling fan 67 is shown located near the coolant radiator 66 for dissipating heat from the coolant radiator 66.

[0166] As Figure 1In another embodiment of the structure shown, the vacuum chamber 21 is not required, and the second piston rod 19 can be connected to the second telescopic cylinder 31. As an example, the second piston rod 19 can be connected to the second telescopic cylinder 31 via a folding connection mechanism. The folding connection mechanism includes a lateral support arm 68, a second connecting bearing 73, a first swing arm 69, a first connecting bearing 72, a second swing arm 70, a third connecting bearing 74, a connector 71, and a touch switch 75. The lateral support arm 68 is fixedly connected to the second piston rod 19, the first swing arm 69 is movably connected to the lateral support arm 68 via the second connecting bearing 73, and the first swing arm 69 is movably connected to the second swing arm 70 via the first connecting bearing 72. The second swing arm 70 is movably connected to the connector 71 via the third connecting bearing 74, and the connector 71 is fixedly connected to the second telescopic cylinder 31. A torsion spring 76 is provided at the second connecting bearing 73, which can promote clockwise rotation of the first swing arm 69. A touch switch 75 is located below the transverse support arm 68, and the touch switch 75 can be connected to the motor 24 via a wire. When using the folding connection mechanism, the opening and closing of the motor 24 can be controlled jointly by an external switch and the touch switch 75. When the folding connection mechanism is in the folded state, the distance between the second telescopic cylinder 31 and the second piston rod 19 is smaller than the distance between the second telescopic cylinder 31 and the second piston rod 19 when the folding connection mechanism is in the unfolded state.

[0167] Figure 12 This diagram shows a top view of the folding connection mechanism in its folded state. The second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 are shown. Figure 6 During the deceleration process in the direction indicated by the arrow, the folding connection mechanism is in a folded state, and the second telescopic cylinder 31, fixed rod 32, first telescopic cylinder 33, first piston rod 20, and first pneumatic piston 45 move in the direction indicated by the arrow. Figure 6 During the acceleration motion in the opposite direction of the arrow, the folding connection mechanism is also in a folded state. When the folding connection mechanism is in a folded state, the first swing arm 69 presses down on the touch switch 75. At this time, since the external switch is in an open state, the motor 24 is in an on state under the joint control of the external switch and the touch switch 75.

[0168] Figure 13 A top view of the folding connection mechanism in its unfolded state is shown, and Figure 14 A side view of the folding connection mechanism in its unfolded state is shown. During the unfolding process, the first swing arm 69 releases the touch switch 75, at which point the motor 24 is turned off. During the unfolding process, the torsion spring 76 causes the first swing arm 69 to rotate clockwise. Figure 14The unfolded state shown is the maximum unfolded state that the folding connection mechanism can achieve.

[0169] The following describes the control of the external switch and the touch switch 75 on and off the motor 24 in two scenarios.

[0170] A single reciprocating motion is completed using only the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 (similar to...). Figures 3 to 6 In the case of operation), when the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move towards... Figure 3 When the movement accelerates in the direction indicated by the arrow, the external switch is activated. At this time, the folding connection mechanism is in the folded state, and the first swing arm 69 presses against the touch switch 75. Therefore, under the joint control of the external switch and the touch switch 75, the motor 24 is turned on. This allows the motor 24 to generate thrust on the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45, thereby increasing the kinetic energy of the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45. As the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move, the folding connection mechanism unfolds, and the first swing arm 69 releases the touch switch 75, thus turning off the motor 24. When the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move towards... Figure 6 When the movement decelerates in the direction indicated by the arrow, the folding connection mechanism is in the folded state again. Therefore, the touch switch 75 is pressed down again by the first swing arm 69, which in turn causes the motor 24 to start again. After the motor 24 starts again, the second pneumatic piston 18 reaches the desired position under the driving action of the motor 24, crankshaft 25, crankshaft connecting rod 23, and guide rod 22. Figure 6 After reaching the position shown in the diagram, turn off the external switch to shut off motor 24.

[0171] The second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 need to complete multiple reciprocating movements (similar to multiple...). Figures 3 to 6 In the case of operation), during the first reciprocating motion of the second telescopic cylinder 31, fixed rod 32, first telescopic cylinder 33, first piston rod 20, and first pneumatic piston 45, when the second telescopic cylinder 31, fixed rod 32, first telescopic cylinder 33, first piston rod 20, and first pneumatic piston 45 move towards... Figure 3When the movement accelerates in the direction indicated by the arrow, the external switch is activated. At this time, the folding connection mechanism is in the folded state, and the first swing arm 69 presses against the touch switch 75. Therefore, under the joint control of the external switch and the touch switch 75, the motor 24 is turned on. As the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move, the folding connection mechanism unfolds, and the first swing arm 69 releases the touch switch 75, thus turning off the motor 24. When the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move towards... Figure 6 When the movement decelerates in the direction indicated by the arrow, the folding connection mechanism is in a folded state again. Therefore, the touch switch 75 is pressed down again by the first swing arm 69, which in turn turns the motor 24 on again. During the next reciprocating motion, the folding connection mechanism unfolds again, so the first swing arm 69 releases the touch switch 75 again, causing the motor 24 to be turned off again. Therefore, during the multiple reciprocating motions of the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45, the opening and closing of the motor 24 can be controlled by the touch switch 75.

[0172] When the second telescopic cylinder 31, fixed rod 32, first telescopic cylinder 33, first piston rod 20, and first pneumatic piston 45 begin their next reciprocating motion, the motor 24 is in the on state. The motor 24 will generate thrust on the second telescopic cylinder 31, fixed rod 32, first telescopic cylinder 33, first piston rod 20, and first pneumatic piston 45, thereby increasing their kinetic energy. During the last reciprocating motion of the second telescopic cylinder 31, fixed rod 32, first telescopic cylinder 33, first piston rod 20, and first pneumatic piston 45, when the second pneumatic piston 18 reaches its final position under the driving action of the motor 24, crankshaft 25, crankshaft connecting rod 23, and guide rod 22... Figure 6 After reaching the position shown in the diagram, turn off the external switch to shut off motor 24.

[0173] During the reciprocating motion of the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45, when the folding connection mechanism is in the folded state, the folding connection mechanism locks the distance between the second telescopic cylinder 31 and the second piston rod 19.

[0174] During the reciprocating motion of the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45, when the folding connection mechanism is in the unfolded state, the folding connection mechanism does not lock the distance between the second telescopic cylinder 31 and the second piston rod 19.

[0175] The advantage of connecting the second piston rod 19 to the second telescopic cylinder 31 through the folding connection mechanism is that it can avoid the collision between the second telescopic cylinder 31 and the second piston rod 19, thereby avoiding impact noise, reducing energy loss, and further improving the energy storage efficiency of the energy storage device.

[0176] Figure 1 The structure shown employs both high-pressure and low-pressure flexible conduits. However, considering that the flexible materials of these conduits may be damaged during prolonged use, rigid movable conduits can be used instead to avoid this damage. Figure 15 and Figure 16 The structural schematic diagram and side view of the rigid movable pipeline are shown respectively.

[0177] The rigid movable conduit includes a first interface 79, a second rotary sealing interface 81, a first rigid conduit 77, a third rotary sealing interface 82, a second rigid conduit 78, a first rotary sealing interface 80, and a second interface 83. The first interface 79 and the second interface 83 can be connected to external components through various connection methods. The first rigid conduit 77 is movably connected to the first interface 79 via the second rotary sealing interface 81, and the first rigid conduit 77 is movably connected to the second rigid conduit 78 via the third rotary sealing interface 82. The second rigid conduit 78 is movably connected to the second interface 83 via the first rotary sealing interface 80. The first rotary sealing interface 80, the second rotary sealing interface 81, and the third rotary sealing interface 82 can have similar structures. Taking the third rotary sealing interface 82 as an example, the third rotary sealing interface 82 can include two parts, one of which can be connected to the first rigid conduit 77, and the other of which can be connected to the second rigid conduit 78. These two parts can be movably connected using rotary seals known in the art. The curvature of the rigid movable pipeline can be adjusted by rotating the first rotary sealing port 80, the second rotary sealing port 81, and the third rotary sealing port 82. During use, hydraulic fluid can enter and exit the rigid movable pipeline through the first port 79 and the second port 83 and can flow within the rigid movable pipeline.

[0178] When power supply is lost and the energy stored in the energy storage device needs to be used for power generation, the second valve 53 and the third valve 52 are opened. When the third valve 52 is opened, the hydraulic fluid 34 in the second high-pressure container 12 flows into the second low-pressure container 11 under the pressure of the high-pressure gas in the second high-pressure container 12 through the second oil passage 47 and the second hydraulic motor 9. During the flow of the hydraulic fluid 34 from the second high-pressure container 12 into the second low-pressure container 11 through the second oil passage 47 and the second hydraulic motor 9, the pressure of the hydraulic fluid 34 in the second high-pressure container 12 drives the second hydraulic motor 9 to rotate, and the second hydraulic motor 9 drives the second generator 10 to generate electricity.

[0179] When the second valve 53 is opened, the hydraulic fluid 34 in the first high-pressure container 42 flows into the first low-pressure container 41 under the pressure of the high-pressure gas in the first high-pressure container 42 through the first oil passage 48 and the first hydraulic motor 43. During the process of the hydraulic fluid 34 in the first high-pressure container 42 flowing into the first low-pressure container 41 through the first oil passage 48 and the first hydraulic motor 43, the pressure of the hydraulic fluid 34 in the first high-pressure container 42 drives the first hydraulic motor 43 to rotate, and the first hydraulic motor 43 drives the first generator 44 to generate electricity.

[0180] The technical concept of the present invention has been described above with reference to exemplary embodiments thereof. However, those skilled in the art will understand that the present invention is not limited to the specific embodiments described above, but various changes can be made within the scope of the technical concept described above.

[0181] For example, the energy storage device of the present invention may not necessarily have all the components described above. In another embodiment, the energy storage device of the present invention may not have the second cylinder 16, the third horizontal hydraulic cylinder 2, the fourth horizontal hydraulic cylinder 35, etc. described above. Specifically, the energy storage device of this embodiment includes: a movable hydraulic cylinder having a fixed cylinder body and a telescopic cylinder body capable of moving axially relative to the fixed cylinder body, wherein hydraulic fluid is present in the cavity defined by the fixed cylinder body and the telescopic cylinder body; a first cylinder located on one axial side of the movable hydraulic cylinder, one end of the piston rod of the first cylinder pointing towards the telescopic cylinder body of the movable hydraulic cylinder; a first transverse hydraulic cylinder fixed to one side of the telescopic cylinder body of the movable hydraulic cylinder and communicating with the cavity of the movable hydraulic cylinder; a second transverse hydraulic cylinder having a piston connecting rod internally capable of extending and retracting within the second transverse hydraulic cylinder, the piston connecting rod being connected to a piston within the first transverse hydraulic cylinder; a first high-pressure container communicating with the second transverse hydraulic cylinder; a first hydraulic motor connected to the first high-pressure container and capable of being driven by the high-pressure fluid within the first high-pressure container; and a first generator connected to the first hydraulic motor and capable of generating electricity by being driven by the first hydraulic motor.

[0182] In addition, various design changes can be made to the components described above.

[0183] For example, Figure 7 and Figure 8 The internal structure of the second cylinder 16 of the energy storage device according to another embodiment of the present invention is illustrated. The second cylinder 16 also includes a retaining ring 54 and an annular piston 55 with a central protrusion. The second pneumatic piston 18 and the annular piston 55 divide the interior of the second cylinder 16 into three parts, wherein the part between the second pneumatic piston 18 and the annular piston 55 does not contain high-pressure gas, while the other two parts contain high-pressure gas. In this embodiment, the second conduit 49 can be divided into two branches, which can lead to the other two parts.

[0184] When the second telescopic cylinder 31, the fixed rod 32, the first telescopic cylinder 33, the first piston rod 20, and the first pneumatic piston 45 move towards Figure 5 The arrow in the middle indicates that the movement is accelerating to... Figure 5 When the second telescopic cylinder 31 is in the position shown, its closed end contacts the second piston rod 19. After the closed end of the second telescopic cylinder 31 contacts the second piston rod 19, the annular piston 55 begins to move towards the second pneumatic piston 18 under the pressure of the high-pressure gas in the second cylinder 16, until the annular piston 55 moves to the position of the retaining ring 54, at which point the annular piston 55 stops moving. At this time, the second piston rod 19 continues to push the second pneumatic piston 18. In this way, the impact force on the second piston rod 19 can be reduced, thereby reducing the energy loss generated when the second pneumatic piston 18 is reset.

[0185] Figures 17 to 19 This is a schematic diagram of the internal structure of the fixed cylinder 1 of an energy storage device according to another embodiment of the present invention. When the length of the fixed rod 32 is relatively long, it can be used... Figures 17 to 19 The internal structure of the fixed cylinder 1 is shown. (Reference) Figure 17 A vertical support wall 84 is provided on the inner wall 59 of the fixed cylinder 1, and an orifice 85 is provided on the support wall 84. The fixing rod 32 can pass through the support wall 84, conforming to the inner wall of the orifice 85. (Reference) Figure 18 and Figure 19 The support wall 84 may also have a curved protrusion structure 86. The curved protrusion structure 86 can reduce the flow resistance generated by the end face of the support wall 84 on the reciprocating hydraulic fluid 34.

[0186] When the length of the fixing rod 32 is relatively long, the middle part of the fixing rod 32 may bend under the action of gravity. In this case, it is possible to use... Figures 17 to 19The internal structure of the fixed cylinder 1 shown is designed to prevent the middle part of the fixed rod 32 from bending due to gravity. During the reciprocating motion of the fixed rod 32, the fixed rod 32 can extend and retract within the orifice 85 of the support wall 84, thus preventing the middle part of the fixed rod 32 from bending.

[0187] In addition, before using the energy storage device of the present invention, the base 15 of the energy storage device can be fixed to a fixed foundation pile pre-embedded in the ground using a plurality of fixing screws. The purpose of doing so is to prevent the energy storage device of the present invention from shaking during use, thereby reducing the energy loss caused by the shaking of the energy storage device during operation.

[0188] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention. Furthermore, it should be noted that the components of the present invention are not limited to the overall application described above. Each technical feature described in the specification can be used individually or in combination as needed. Therefore, the present invention naturally covers other combinations and specific applications related to the inventive points of this case.

Claims

1. An energy storage device, the energy storage device comprising: A movable hydraulic cylinder having a fixed cylinder body and a telescopic cylinder body capable of moving axially relative to the fixed cylinder body, wherein hydraulic fluid is contained within a cavity defined by the fixed cylinder body and the telescopic cylinder body. The first cylinder is located on one axial side of the movable hydraulic cylinder, and one end of the piston rod of the first cylinder points towards the telescopic cylinder body of the movable hydraulic cylinder; The first horizontally positioned hydraulic cylinder is fixed to one side of the telescopic cylinder body of the movable hydraulic cylinder and communicates with the chamber of the movable hydraulic cylinder. The second horizontal hydraulic cylinder has a piston connecting rod that can extend and retract within the second horizontal hydraulic cylinder, and the piston connecting rod is connected to the piston in the first horizontal hydraulic cylinder. The first high-pressure vessel is connected to the second horizontally positioned hydraulic cylinder; A first hydraulic motor is connected to the first high-pressure vessel and can be driven by high-pressure fluid inside the first high-pressure vessel; A first generator is connected to the first hydraulic motor and can generate electricity by being driven by the first hydraulic motor; A first high-pressure air source is connected to the first cylinder; A first low-pressure vessel is connected to a first high-pressure vessel via a first hydraulic motor, and the first low-pressure vessel is connected to a second horizontally positioned hydraulic cylinder via a third check valve.

2. The energy storage device according to claim 1, wherein, The piston rod of the first cylinder has one end pointing towards the telescopic cylinder body of the movable hydraulic cylinder connected to or in contact with the telescopic cylinder body of the movable hydraulic cylinder.

3. The energy storage device according to claim 1, wherein, The energy storage device also has a second cylinder located on the opposite side of the movable hydraulic cylinder from the first cylinder along the axial direction. One end of the piston rod of the second cylinder can contact or separate from the telescopic cylinder body of the movable hydraulic cylinder.

4. The energy storage device according to claim 1, wherein, The energy storage device also has a second cylinder located on the opposite side of the movable hydraulic cylinder from the first cylinder along the axial direction, and one end of the piston rod of the second cylinder can be connected to the telescopic cylinder body of the movable hydraulic cylinder.

5. The energy storage device according to claim 3 or 4, wherein, The energy storage device also features: A third horizontally positioned hydraulic cylinder is fixed to the opposite side of the telescopic cylinder body of the movable hydraulic cylinder, opposite to the first horizontally positioned hydraulic cylinder, and communicates with the chamber of the movable hydraulic cylinder. The fourth horizontal hydraulic cylinder has a piston connecting rod that can extend and retract within the cylinder, and the piston connecting rod is connected to the piston in the third horizontal hydraulic cylinder. The second high-pressure vessel is connected to the fourth horizontally positioned hydraulic cylinder; A second hydraulic motor is connected to the second high-pressure vessel and can be driven by high-pressure fluid inside the second high-pressure vessel; The second generator is connected to the second hydraulic motor and can generate electricity by being driven by the second hydraulic motor.

6. The energy storage device according to claim 5, wherein, The energy storage device also has a second high-pressure gas source connected to the second cylinder.

7. The energy storage device according to claim 1, wherein, The telescopic cylinder body includes a first telescopic cylinder body and a second telescopic cylinder body that are opposite each other and are connected as one unit.

8. The energy storage device according to claim 3 or 4, wherein, The energy storage device also has a reset mechanism for resetting the position of the piston in the second cylinder.

9. The energy storage device according to claim 5, wherein, The second horizontal hydraulic cylinder is connected to the first high-pressure vessel via a first check valve; and the fourth horizontal hydraulic cylinder is connected to the second high-pressure vessel via a second check valve.

10. The energy storage device according to claim 5, wherein, The energy storage device also includes: a second low-pressure container connected to the second high-pressure container via the second hydraulic motor, the second low-pressure container being connected to the fourth horizontal hydraulic cylinder via a fourth check valve.

11. The energy storage device according to claim 4, wherein, One end of the piston rod of the second cylinder can be connected to the telescopic cylinder body of the movable hydraulic cylinder via a folding connection mechanism.

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