A power storage device based on grid-load-storage integration

Abstract

The present invention relates to the field of power storage equipment, and in particular to a power storage device based on grid-load-storage integration, comprising a power switching storage cabinet, wherein the power switching storage cabinet comprises a cabinet body, a plurality of mounting frames 2 are installed on one side of the cabinet body, a plurality of mounting frames 1 are installed on the other side of the cabinet body, a vacuum cylinder is installed in the middle of the mounting frame 2, a branch cylinder is arranged inside the vacuum cylinder, the bottom of the branch cylinder passes through the middle of the bottom end of the vacuum cylinder, a fixing plate is installed on the upper part of the outer periphery of the branch cylinder, the fixing plate is fixedly connected to the middle and upper part of the vacuum cylinder, a plurality of contact pieces 2 are arranged on the inner side of the branch cylinder, a uniformly distributed lower interface is opened on the outer side of the bottom of the branch cylinder, a rotating cylinder is rotatably connected to the upper part of the inner side of the branch cylinder, and a power connection ring is installed on the lower part of the rotating cylinder. The present invention can automatically realize the switching of circuits according to the charging status of a power storage module, avoid power waste, and reduce the damage of the power storage module to continuous charging.

Description

Technical Field

[0001] The present invention relates to the field of power storage equipment, and in particular to a power storage device based on grid-load-storage integration. Background Art

[0002] Photovoltaic power generation and energy storage device construction is one of the country's important new energy development infrastructure. A large amount of photovoltaic energy is wasted on the vast hillsides and mountains. In subsequent applications, people use energy storage devices to charge and reserve power during low electricity consumption and use it during peak electricity consumption. This method effectively alleviates the power supply pressure of the power grid during peak electricity consumption. However, in actual use, after the peak electricity consumption, some power in the power storage modules has not been fully output. At this time, energy storage continues, which often causes damage to the batteries in the storage modules. At the same time, after a power storage module completes energy storage, it can generally only achieve automatic circuit disconnection and no longer recharge. At this time, the energy generated by subsequent power generation will be wasted, and manual switching of energy storage lines is required. Therefore, we propose an electric storage device based on grid-load-storage integration to solve the above-mentioned problems. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings existing in the background technology and to propose an electric power storage device based on grid-load-storage integration.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: an electric power storage device based on grid-load-storage integration, including an electric power switching storage cabinet, the electric power switching storage cabinet including a cabinet body, a plurality of mounting frames 2 are installed on one side of the cabinet body, a plurality of mounting frames 1 are installed on the other side of the cabinet body, a vacuum cylinder is installed in the middle of the mounting frame 2, a tapping cylinder is arranged inside the vacuum cylinder, the bottom of the tapping cylinder passes through the middle of the bottom end of the vacuum cylinder, a fixing plate is installed on the upper part of the outer periphery of the tapping cylinder, the fixing plate is fixedly connected to the middle and upper part of the vacuum cylinder, and a vacuum cylinder is arranged inside the tapping cylinder. A plurality of contact pieces 2 are arranged, and a uniformly distributed lower interface is opened on the outer side of the bottom of the branch tube, and the lower interface corresponds to the contact piece 2 one by one. The upper inner part of the branch tube is rotatably connected with a rotating drum, and a power connection ring is installed on the lower inner part of the rotating drum. Contact pieces 1 are installed on both sides of the outer periphery of the power connection ring, and the ends of the contact pieces 1 pass through the wall of the rotating drum. The inner side of the power connection ring is rotatably connected with a power connection pole, and the top of the power connection pole is fixedly connected with a connecting head, and a plurality of upper interfaces are installed on the top of the connecting head, and the bottom of the connecting head is rotatably connected to the upper inner part of the rotating drum, and the upper outer periphery of the rotating drum is fixedly connected with a gear ring.

[0005] Preferably, the power switching storage cabinet is arranged in a photovoltaic power grid load-storage integrated system, the power switching storage cabinet is connected to a central control system, the central control system is connected to a photovoltaic power generation module, the photovoltaic power generation module is connected to a power output module, the photovoltaic power generation module is connected to a power switching storage cabinet, and the power switching storage cabinet is connected to multiple power storage modules.

[0006] Preferably, a current-stabilizing transformer is installed on the top of the mounting frame, a harmonic rectifier is installed on one side of the current-stabilizing transformer, a bidirectional converter is installed at the rear of the harmonic rectifier, the bidirectional converter, the harmonic rectifier and the current-stabilizing transformer are electrically connected to the power storage module, and a plurality of cabinet doors are installed on the front of the cabinet through hinges.

[0007] Preferably, the gear ring is rotatably connected to the vacuum cylinder via a limiting ring, the limiting rings are respectively provided on the upper and lower end surfaces of the gear ring, and the rear portion of the gear ring is meshedly connected with a driving gear.

[0008] Preferably, a servo motor is provided on the lower rear side of the vacuum cylinder, and the servo motor is installed on the rear side of the middle part of the second mounting frame, the servo motor driving end is fixedly connected to a rotating shaft, a driving gear is fixedly connected to the upper part of the outer periphery of the rotating shaft, a driving bevel gear is provided on the upper side of the driving gear, the driving bevel gear is fixedly connected to the top of the outer periphery of the rotating shaft, one side of the driving bevel gear is meshingly connected with a driven bevel gear, the middle part of the driven bevel gear is fixedly connected with a rotating rod, one end of the rotating rod away from the driven bevel gear penetrates the protective cover and is rotatably connected to the protective cover, and the end of the rotating rod away from the driven bevel gear is connected to the mounting shaft in the middle part of the transmission gear through a transmission assembly.

[0009] Preferably, the transmission assembly is arranged inside the protective cover, a transmission gear is arranged inside the protective cover, the transmission gear is rotatably connected to the protective cover, one side of the transmission gear is meshingly connected with a driven gear, the middle part of the driven gear is fixedly connected with a rotating shaft, the rotating shaft passes through the side wall of the cabinet, and an indicator needle is fixedly connected to one end of the outer periphery of the rotating shaft away from the driven gear.

[0010] Preferably, a slide is provided on the upper portion of the vacuum cylinder, the slide is slidably connected to an upper portion of one side of the cabinet, and a plurality of line collection tubes are installed in the middle of the slide.

[0011] Preferably, a protective cover is provided on one side of the vacuum cylinder, and the protective cover is installed in the middle of a side wall inside the cabinet. A wiring socket is provided on one side of the lower part of the vacuum cylinder, and the output of the wiring socket is respectively connected to each power storage module.

[0012] Preferably, the indicator needle is arranged on one side of the cabinet, and a plurality of indicator rings are fixedly connected to the outer wall of one side of the cabinet, and the indicator rings are all arranged around the outside of the indicator needle.

[0013] Preferably, the power storage modules are all connected to a power connection module, the power connection module is connected to a power output module, the power connection module is all connected to a power management system, and the power management system is electrically connected to the servo motor.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Each power storage module of the present invention is numbered according to priority in the overall system. When power reserve is performed, power reserve work is performed according to the number. When the power storage module with the leading sequence number is fully charged, the power management system will automatically disconnect the circuit and cancel the output restriction on the circuit storage module at the same time. By synchronously disconnecting the front line of the upper interface and the rear line of the lower interface, power backlash is avoided to affect the overall circuit. During circuit switching, the inside of the vacuum cylinder is in a vacuum state, and the lines at the upper interface and the lower interface are both in a disconnected state, so that no arc is generated when switching the circuit, which can effectively avoid unexpected situations when switching the lines and can maximize the guarantee of power grid safety.

[0016] The power storage module with the output restriction canceled will connect to the servo motor, which can drive the shaft to rotate through the operation of the servo motor. When the shaft rotates, it can drive the driving gear and the driving bevel gear to rotate synchronously. The driving gear can drive the gear ring meshing with it to rotate, and the gear ring can drive the rotating drum inside the vacuum cylinder to rotate. When the rotating drum is driven to deflect, the misalignment between contact piece 1 and contact piece 2 will be achieved, thereby realizing the switching of the transmission line. When the circuit switching is completed, the servo motor stops working, and the circuit breakers at the upper interface and the lower interface are synchronously connected to realize power storage again, so that the circuit can be automatically switched according to the charging status of the power storage module, avoiding power waste and reducing damage to the power storage module caused by continuous charging, which is beneficial to actual use.

[0017] When the active bevel gear is driven to rotate, the driven bevel gear can be driven to rotate through the active bevel gear, and the driven bevel gear can be driven to rotate. The coaxial transmission gear can be driven to rotate synchronously through the transmission assembly through the rotating rod. When the transmission gear rotates, it will drive the driven gear meshing with it to rotate. The cabinet door will be driven to rotate synchronously through the rotating shaft in the middle of the driven gear, so that the cabinet door will point to the next indicator ring. Each indicator ring refers to a different energy storage line. The indicator needle can display the operating status of the energy storage line at this time, helping people to determine which specific energy storage line of the power grid is at this time. During daily inspections, people do not need to visit the central control, but can know the energy storage progress of the power switching storage cabinet by observing the appearance of the equipment.

[0018] When in use, the voltage input from the power grid can be stabilized by the current-stabilizing transformer, so that the current input to the power storage module can be more stable, reducing damage to the power storage module, which is beneficial to the long-term use of the power storage module. The bidirectional converter can realize the property change of the output current of the power storage module, which is beneficial to the power supply of the power storage module during peak power consumption. At the same time, the bidirectional converter and the power connection module can concentrate the power in the power storage module that has not been fully output during peak power consumption, so as to achieve full discharge of the power storage module, and avoid the situation that the stress change of the crystal structure inside the battery due to the uneven distribution of lithium ions inside the battery when the power storage module is storing energy, which affects the battery life, and is beneficial to actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front view of the three-dimensional structure of a power switching storage cabinet of a power storage device based on grid-load-storage integration of the present invention;

[0020] Figure 2 This is one of the internal structural schematic diagrams of a power switching storage cabinet of a power storage device based on grid-load-storage integration of the present invention;

[0021] Figure 3 This is a second schematic diagram of the internal structure of a power switching storage cabinet of a power storage device based on grid-load-storage integration of the present invention;

[0022] Figure 4 It is a partial structural schematic diagram of a protective cover of a power storage device based on grid-load-storage integration of the present invention;

[0023] Figure 5 It is a schematic diagram of the local structure of the vacuum cylinder of a power storage device based on grid-load-storage integration of the present invention;

[0024] Figure 6 It is a partial structural schematic diagram of a branching tube of a power storage device based on grid-load-storage integration of the present invention;

[0025] Figure 7 It is a schematic diagram of the local structure of the rotating drum of a power storage device based on grid-load-storage integration of the present invention;

[0026] Figure 8 It is a partial structural schematic diagram of a power connection column of a power storage device based on grid-load-storage integration of the present invention;

[0027] Fig. 9 This is a schematic diagram of the photovoltaic power grid-load-storage integrated system architecture of a power storage device based on a grid-load-storage integrated power storage device of the present invention.

[0028] 1. Power switching storage cabinet; 101. Cabinet; 102. Cabinet door; 103. Index ring; 104. Indicator needle; 105. Terminal block; 106. Bidirectional converter; 107. Harmonic rectifier; 108. Current-stabilizing transformer; 109. Mounting frame 1; 110. Mounting frame 2; 111. Vacuum cylinder; 112. Slide; 113. Wire collection cylinder; 114. Protective cover; 115. Transmission gear; 116. Transmission assembly; 117. Gear Ring; 118, lower interface; 119, branch cylinder; 120, servo motor; 121, driven gear; 122, rotating rod; 123, upper interface; 124, active bevel gear; 125, driven bevel gear; 126, active gear; 127, rotating shaft; 128, fixing plate; 129, connecting pole; 130, contact piece 2; 131, contact piece 1; 132, rotating cylinder; 133, limiting ring; 134, connecting head; 135, connecting ring. DETAILED DESCRIPTION

[0029] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0030] like Figure 1-Figure 9 The power storage device based on grid-load-storage integration shown in the figure includes a power switching storage cabinet 1, which includes a cabinet body 101, a plurality of mounting frames 110 are installed on one side of the cabinet body 101, and a plurality of mounting frames 109 are installed on the other side of the cabinet body 101. A vacuum cylinder 111 is installed in the middle of the mounting frame 110, and a branch cylinder 119 is arranged inside the vacuum cylinder 111. The bottom of the branch cylinder 119 passes through the middle of the bottom end of the vacuum cylinder 111. A fixing plate 128 is installed on the upper part of the outer periphery of the branch cylinder 119. The fixing plate 128 is fixedly connected to the middle and upper part of the vacuum cylinder 111. A plurality of contact pieces 130 are arranged on the inner side of the branch cylinder 119. The branch cylinder 119 The outer side of the bottom is provided with evenly distributed lower interfaces 118, and the lower interfaces 118 correspond to the contact pieces 130 one by one. The upper part of the branch tube 119 is rotatably connected to the rotating tube 132, and the lower part of the rotating tube 132 is installed with a power connection ring 135. Both sides of the outer periphery of the power connection ring 135 are installed with contact pieces 131, and the ends of the contact pieces 131 penetrate the wall of the rotating tube 132. The inner side of the power connection ring 135 is rotatably connected to the power connection column 129, and the top of the power connection column 129 is fixedly connected to a connector 134, and a plurality of upper interfaces 123 are installed on the top of the connector 134. The bottom of the connector 134 is rotatably connected to the upper part of the rotating tube 132, and the upper part of the outer periphery of the rotating tube 132 is fixedly connected to a gear ring 117.

[0031] Furthermore, in specific implementation, each power storage module is numbered according to priority in the overall system. When power reserve is performed, power reserve work is performed according to the number. When the power storage module with the leading sequence number is fully charged, the power management system will automatically disconnect the circuit and cancel the output restriction on the circuit storage module by synchronously disconnecting the front line of the upper interface 123 and the rear line of the lower interface 118 to avoid power backlash and affect the overall circuit. The power storage module with the output restriction canceled will connect to the servo motor 120, and the servo motor 120 can drive the rotating shaft 127 to rotate. When the rotating shaft 127 rotates, it can drive the driving gear 126 and the driving bevel gear 124 to rotate synchronously. The driving gear 126 can drive the gear ring 117 meshing with it to rotate, and the gear ring 117 can drive the true The rotating cylinder 132 inside the empty cylinder 111 rotates, and when the rotating cylinder 132 is driven to deflect, the misalignment between the contact piece 131 and the contact piece 2 130 is realized, so that the switching of the transmission line can be realized. When the circuit switching is completed, the servo motor 120 stops working, and the circuit breakers at the upper interface 123 and the lower interface 118 are synchronously connected to realize the power storage work again, so that the circuit can be automatically switched according to the charging status of the power storage module, avoiding power waste and reducing the damage to the power storage module caused by continuous charging, which is beneficial to practical use. At the same time, during the circuit switching work, the inside of the vacuum cylinder 111 is in a vacuum state, and the lines at the upper interface 123 and the lower interface 118 are both in a disconnected state, so that no arc will be generated when switching the circuit, which can effectively avoid unexpected situations when switching the line and can maximize the guarantee of power grid safety.

[0032] Among them, a current-stabilizing transformer 108 is installed on the top of the mounting frame 109, and a harmonic rectifier 107 is installed on one side of the current-stabilizing transformer 108. The harmonic rectifier 107 is used to suppress the harmonic current in the circuit. A bidirectional converter 106 is installed at the rear of the harmonic rectifier 107. The bidirectional converter 106, the harmonic rectifier 107 and the current-stabilizing transformer 108 are all electrically connected to the power storage module. A plurality of cabinet doors 102 are installed at the front of the cabinet 101 through hinges, a protective cover 114 is provided on one side of the vacuum cylinder 111, a slide 112 is provided on the upper part of the vacuum cylinder 111, and the slide 112 is slidably connected to the upper part of one side of the cabinet 101. A plurality of wire collection barrels 113 are installed in the middle of the slide 112, and the protective cover 114 is installed in the middle of one side wall of the cabinet 101. A wiring seat 105 is provided on one side of the lower part of the vacuum cylinder 111, and the output of the wiring seat 105 is respectively connected to each power storage module;

[0033] Furthermore, in a specific implementation, the voltage input from the power grid can be stabilized by the current-stabilizing transformer 108, so that the current input to the power storage module can be more stable, reducing damage to the power storage module, which is beneficial to the long-term use of the power storage module. The bidirectional converter 106 can realize the property change of the output current of the power storage module, which is beneficial to the power supply of the power storage module during peak power consumption. At the same time, the bidirectional converter 106 and the power connection module can concentrate the power in the power storage module that has not been fully output during peak power consumption, so as to achieve full discharge of the power storage module, and avoid the situation that when the power storage module is storing energy, the stress change of the crystal structure inside the battery due to the uneven distribution of lithium ions inside the battery affects the battery life, which is beneficial to actual use.

[0034] Among them, the gear ring 117 is rotatably connected with the vacuum cylinder 111 through a limit ring 133, and the limit ring 133 is respectively arranged on the upper and lower end surfaces of the gear ring 117, and the rear part of the gear ring 117 is meshed with a driving gear 126, and a servo motor 120 is arranged on the lower side of the rear of the vacuum cylinder 111, and the servo motor 120 is installed on the rear side of the middle part of the mounting frame 110, and the driving end of the servo motor 120 is fixedly connected with a rotating shaft 127, and the upper part of the outer periphery of the rotating shaft 127 is fixedly connected with a driving gear 126, and a driving bevel gear 124 is arranged on the upper side of the driving gear 126, and the driving bevel gear 124 is fixedly connected to the top of the outer periphery of the rotating shaft 127, and one side of the driving bevel gear 124 is meshed with a driven bevel gear 125, and the middle part of the driven bevel gear 125 is fixedly connected with a rotating rod 122, and the end of the rotating rod 122 away from the driven bevel gear 125 penetrates The protective cover 114 is rotatably connected to the protective cover 114. One end of the rotating rod 122 away from the driven bevel gear 125 is connected to the mounting shaft in the middle of the transmission gear 115 through the transmission assembly 116. The transmission assembly 116 is arranged inside the protective cover 114. The transmission gear 115 is rotatably connected to the protective cover 114. One side of the transmission gear 115 is meshedly connected with the driven gear 121. The middle of the driven gear 121 is fixedly connected with a rotating shaft, which passes through the side wall of the cabinet 101. The end of the outer periphery of the rotating shaft away from the driven gear 121 is fixedly connected with an indicator needle 104. The cabinet door 102 is arranged on one side of the cabinet 101. A plurality of indicator rings 103 are fixedly connected to the outer wall of one side of the cabinet 101. The indicator rings 103 are all arranged around the outside of the indicator needle 104.

[0035] Furthermore, in a specific implementation, when the active bevel gear 124 is driven to rotate, the driven bevel gear 125 can be driven to rotate through the active bevel gear 124, and the driven bevel gear 125 can be driven to rotate 12, and the coaxial transmission gear 115 can be driven to rotate synchronously by the transmission assembly 116 through the rotating rod 122, and when the transmission gear 115 rotates, it will drive the driven gear 121 meshing with it to rotate, and the cabinet door 102 will be driven to rotate synchronously through the rotating shaft in the middle of the driven gear 121, so that the cabinet door 102 will point to the next indicator ring 103, each indicator ring 103 refers to a different energy storage line, and the indicator needle 104 can display the operating status of the energy storage line at this time, so as to assist people in determining which specific energy storage line of the power grid is at this time, so that people do not need to visit the central control during daily inspections, and can know the energy storage progress of the power switching storage cabinet 1 at this time just by observing the appearance of the equipment.

[0036] Among them, the power switching storage cabinet 1 is arranged in the photovoltaic power grid load-storage integrated system, the power switching storage cabinet 1 is connected to the central control system, the central control system is connected to the photovoltaic power generation module, the photovoltaic power generation module is connected to the power output module, the photovoltaic power generation module is connected to the power switching storage cabinet 1, the power switching storage cabinet 1 is connected to multiple power storage modules, the power storage module includes multiple groups of energy storage batteries, the power storage modules are all connected to the power connection module, the power connection module includes a connection circuit and an output circuit, which are used to concentrate the remaining power in each energy storage battery, the connection circuit and the output circuit are both existing technologies, the power connection module is connected to the power output module, the power connection module is connected to the power management system, the power management system is existing technology, which is used to monitor the voltage and charging current of the battery, realize the connection between the line after the battery is full and the subsequent charging, and realize the control work by sending a control signal to the automatic knife switch, the automatic knife switch is installed in the front line of the upper interface 123 and the rear line of the lower interface 118, and the power management system is electrically connected to the servo motor 120;

[0037] Furthermore, in specific implementation and actual use, people can connect the power supply cable through the upper interface 123, and can constrain the cable through the hub 113 to assist people in organizing the lines. The current will pass through the upper interface 123, the connector 134 and the power pole 129 and be connected by the power ring 135. The contact piece 131 can contact the contact piece 2 130 on the inside of the branch tube 119. People can use the cable to connect the lower interface 118 at the bottom of the branch tube 119 with the terminal block 105 set on one side, thereby completing the connection of the circuit. The output part at the other end of the terminal block 105 is connected to each power storage module through a conductive line, thereby completing the storage of the power generated by the photovoltaic system.

[0038] Working principle:

[0039] In actual use, people can connect the power supply cable through the upper interface 123, and can restrain the cable through the hub 113 to help people organize the lines. The current will pass through the upper interface 123, the connector 134 and the power pole 129 and be connected by the power ring 135. The contact piece 131 can contact the contact piece 2 130 on the inside of the branch tube 119. People can use the cable to connect the lower interface 118 at the bottom of the branch tube 119 with the terminal block 105 set on one side, so as to complete the connection of the circuit. The output part at the other end of the terminal block 105 is connected to each power storage module through a conductive line, so as to complete the storage of the power generated by the photovoltaic system. Each power storage module is numbered according to its priority in the overall system. During storage, power storage is performed according to the number. When the power storage module with the preceding sequence number is fully charged, the power management system will automatically disconnect and cancel the output restriction on the circuit storage module. The front line of the upper interface 123 and the rear line of the lower interface 118 are disconnected synchronously to avoid power backlash and affect the overall circuit. The power storage module with the output restriction canceled will be connected to the servo motor 120. The servo motor 120 can drive the rotating shaft 127 to rotate. When the rotating shaft 127 rotates, it can drive the driving gear 126 and the driving bevel gear 124 to rotate synchronously. The driving gear 126 can drive the gear ring 117 meshing with it to rotate. The gear ring 117 can drive the rotating drum 13 inside the vacuum cylinder 111 to rotate. 2 is rotated, and when the rotating drum 132 is driven to deflect, the misalignment between the contact piece 131 and the contact piece 2 130 is realized, so that the switching of the power transmission line can be realized. When the circuit switching is completed, the servo motor 120 stops working, and the circuit breakers at the upper interface 123 and the lower interface 118 are synchronously connected to realize the power storage work again, so that the circuit can be automatically switched according to the charging status of the power storage module, avoiding power waste and reducing the damage to the power storage module caused by continuous charging, which is beneficial to practical use. At the same time, during the circuit switching work, the inside of the vacuum cylinder 111 is in a vacuum state, and the lines at the upper interface 123 and the lower interface 118 are in a circuit-breaking state, so that no arc is generated when the circuit is switched, which can effectively avoid the occurrence of arc when the line is switched. In the event of an unexpected situation, the safety of the power grid can be guaranteed to the maximum extent. At the same time, when the active bevel gear 124 is driven to rotate, the active bevel gear 124 can drive the driven bevel gear 125 to rotate, and the driven bevel gear 125 can drive 12 to rotate. The rotating rod 122 can use the transmission assembly 116 to drive the coaxial transmission gear 115 to rotate synchronously. When the transmission gear 115 rotates, it will drive the driven gear 121 meshing with it to rotate, and the rotating shaft in the middle of the driven gear 121 will drive the cabinet door 102 to rotate synchronously, so that the cabinet door 102 will point to the next indicator ring 103. Each indicator ring 103 refers to a different energy storage circuit, and the indicator needle 104 can display the operating status of the energy storage circuit at this time.It helps people to judge which energy storage line of the power grid is at this time, so that people do not need to visit the central control during daily inspections. They can know the energy storage progress of the power switching storage cabinet 1 by observing the appearance of the equipment. In actual use, the voltage input to the power grid can be stabilized by the current-stabilizing transformer 108, so that the current input to the power storage module can be more stable, reducing damage to the power storage module, which is beneficial to the long-term use of the power storage module. The bidirectional converter 106 can realize the property change of the output current of the power storage module, which is beneficial to the power supply of the power storage module during peak power consumption. At the same time, the bidirectional converter 106 and the power connection module can concentrate the power in the power storage module that has not been fully output during peak power consumption, so as to achieve full discharge of the power storage module, and avoid the situation that the internal crystal structure of the battery produces stress changes due to the uneven distribution of lithium ions in the battery when the power storage module is storing energy, which affects the battery life, which is beneficial to actual use.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A power storage device based on grid-load-storage integration, comprising a power switching storage cabinet (1), characterized in that: The power switching storage cabinet (1) comprises a cabinet body (101), a plurality of mounting frames (110) are installed on one side of the cabinet body (101), a plurality of mounting frames (109) are installed on the other side of the cabinet body (101), a vacuum cylinder (111) is installed in the middle of the mounting frame (110), a branch cylinder (119) is arranged inside the vacuum cylinder (111), the bottom of the branch cylinder (119) passes through the middle of the bottom end of the vacuum cylinder (111), a fixing plate (128) is installed on the upper part of the outer periphery of the branch cylinder (119), the fixing plate (128) is fixedly connected to the middle and upper part of the vacuum cylinder (111), and a plurality of contact pieces (130) are arranged on the inner side of the branch cylinder (119). ), the outer side of the bottom of the branch tube (119) is provided with evenly distributed lower interfaces (118), the lower interfaces (118) are in one-to-one correspondence with the second contact piece (130), the upper part of the branch tube (119) is rotatably connected to a rotating cylinder (132), the lower part of the rotating cylinder (132) is equipped with a power connection ring (135), both sides of the outer periphery of the power connection ring (135) are equipped with a contact piece 1 (131), the ends of the contact piece 1 (131) penetrate the wall of the rotating cylinder (132), the inner side of the power connection ring (135) is rotatably connected to a power connection column (129), the top of the power connection column (129) is fixedly connected to a connector (134), and the top of the connector (134) is equipped with a plurality of upper interfaces ( 123), the bottom of the connector (134) is rotatably connected to the upper inner part of the rotating drum (132), and the upper outer periphery of the rotating drum (132) is fixedly connected to a gear ring (117). When power storage is performed, the power storage operation is performed according to the number. When the power storage module with the pre-set sequence number is fully charged, the power management system will automatically disconnect the circuit and cancel the output restriction of the circuit storage module at the same time. By synchronously disconnecting the front line of the upper interface (123) and the rear line of the lower interface (118), power backlash is avoided to affect the overall circuit. The power storage module with the output restriction canceled will connect to the servo motor (120), and the operation of the servo motor (120) can drive the rotating shaft (127) to move forward. The rotating shaft (127) rotates, and when the rotating shaft (127) rotates, the driving gear (126) and the driving bevel gear (124) can be driven to rotate synchronously. The driving gear (126) can drive the gear ring (117) meshing therewith to rotate, and the gear ring (117) can drive the rotating cylinder (132) inside the vacuum cylinder (111) to rotate. When the rotating cylinder (132) is driven to deflect, the misalignment between the contact piece 1 (131) and the contact piece 2 (130) can be achieved, thereby switching the power transmission line. When the circuit switching is completed, the servo motor (120) stops working, and the circuit breakers at the upper interface (123) and the lower interface (118) are synchronously connected, so that the power storage operation is achieved again.

2. The power storage device based on grid-load-storage integration according to claim 1 is characterized by: The power switching storage cabinet (1) is arranged in a photovoltaic power grid load-storage integrated system, the power switching storage cabinet (1) is connected to a central control system, the central control system is connected to a photovoltaic power generation module, the photovoltaic power generation module is connected to a power output module, the photovoltaic power generation module is connected to a power switching storage cabinet (1), and the power switching storage cabinet (1) is connected to a plurality of power storage modules.

3. The power storage device based on grid-load-storage integration according to claim 2 is characterized by: A current-stabilizing transformer (108) is installed on the top of each mounting frame (109); a harmonic rectifier (107) is installed on one side of each current-stabilizing transformer (108); a bidirectional converter (106) is installed at the rear of each harmonic rectifier (107); the bidirectional converter (106), the harmonic rectifier (107) and the current-stabilizing transformer (108) are all electrically connected to a power storage module; and a plurality of cabinet doors (102) are installed at the front of the cabinet body (101) via hinges.

4. The power storage device based on grid-load-storage integration according to claim 1 is characterized by: The gear ring (117) is rotatably connected to the vacuum cylinder (111) via a limiting ring (133); the limiting ring (133) is respectively provided on the upper and lower end surfaces of the gear ring (117); and the rear portion of the gear ring (117) is meshedly connected with a driving gear (126).

5. The power storage device based on grid-load-storage integration according to claim 1 is characterized by: A servo motor (120) is arranged at the lower rear side of the vacuum cylinder (111), and the servo motor (120) is mounted at the rear middle side of the second mounting frame (110). A rotating shaft (127) is fixedly connected to the driving end of the servo motor (120), and a driving gear (126) is fixedly connected to the upper outer periphery of the rotating shaft (127). A driving bevel gear (124) is arranged on the upper side of the driving gear (126), and the driving bevel gear (124) is fixedly connected to the top outer periphery of the rotating shaft (127). The driven bevel gear (125) is meshedly connected to one side of the driving bevel gear (124), a rotating rod (122) is fixedly connected to the middle of the driven bevel gear (125), one end of the rotating rod (122) away from the driven bevel gear (125) passes through the protective cover (114) and is rotationally connected to the protective cover (114), and one end of the rotating rod (122) away from the driven bevel gear (125) is connected to the mounting shaft in the middle of the transmission gear (115) through a transmission assembly (116).

6. The power storage device based on grid-load-storage integration according to claim 5 is characterized by: The transmission assembly (116) is arranged inside the protective cover (114), and a transmission gear (115) is arranged inside the protective cover (114). The transmission gear (115) is rotatably connected to the protective cover (114), and one side of the transmission gear (115) is meshingly connected to a driven gear (121). A rotating shaft is fixedly connected to the middle of the driven gear (121), and the rotating shaft passes through the side wall of the cabinet (101). An indicating needle (104) is fixedly connected to an end of the outer periphery of the rotating shaft away from the driven gear (121).

7. The power storage device based on grid-load-storage integration according to claim 1 is characterized by: A slide frame (112) is provided on the upper part of the vacuum cylinder (111), the slide frame (112) is slidably connected to an upper part of one side inside the cabinet (101), and a plurality of line collection barrels (113) are installed in the middle of the slide frame (112).

8. The power storage device based on grid-load-storage integration according to claim 2 is characterized by: A protective cover (114) is provided on one side of the vacuum cylinder (111), and the protective cover (114) is installed in the middle of a side wall inside the cabinet (101). A wiring socket (105) is provided on one side of the lower part of the vacuum cylinder (111), and an output portion of the wiring socket (105) is connected to each power storage module.

9. The power storage device based on grid-load-storage integration according to claim 6 is characterized by: The indicator needle (104) is arranged on one side of the cabinet (101), and a plurality of indicator rings (103) are fixedly connected to the outer wall of one side of the cabinet (101), and the indicator rings (103) are all arranged around the outside of the indicator needle (104).

10. The power storage device based on grid-load-storage integration according to claim 2, characterized in that: The power storage modules are all connected to a power connection module, the power connection module is connected to a power output module, the power connection module is all connected to a power management system, and the power management system is electrically connected to a servo motor (120).

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