Extensible modular energy storage unit, energy storage equipment and method

Abstract

The invention provides an extensible modular energy storage unit, energy storage equipment and a method, and belongs to the technical field of energy storage equipment. An extensible modular energy storage unit comprises an energy storage unit, and the energy storage unit comprises a heat management module, at least one battery module, a control module and a mounting base which are arranged in a stacked mode. The heat management module is connected with the battery module and the control module through the circulating cooling pipeline, and the circulating cooling pipeline forms a loop between the control module and the battery module; the connecting pieces adopt plug structures and are arranged into a plurality of groups; a separation mechanism for displacement of the heat management module or the battery module is arranged on the mounting seat; through integration of cooling pipeline disconnection, electrical connection unlocking and module separation processes, rapid replacement of a single module is realized, time-consuming operation of traditional layer-by-layer disassembly and assembly is avoided, and the method is suitable for rapid deployment and sustainable operation and maintenance of a large-scale energy storage scene.

Description

Technical Field

[0001] This invention relates to the field of energy storage equipment technology, and in particular to a scalable modular energy storage unit, energy storage equipment, and method. Background Technology

[0002] Large-scale energy storage technology is a key technology for smart grids, power dispatch, peak shaving and valley filling, and peak and frequency regulation. Lithium-ion batteries, due to their advantages such as high energy density, low self-discharge rate, stable discharge voltage, and long cycle life, have been widely used in many fields, and their application in large-scale energy storage systems will become an inevitable trend in technological development. However, lithium battery technology is not yet mature. Large-scale energy storage systems require thousands of lithium-ion cells connected in series and parallel to form a system, placing high demands on thermal management and other safety management aspects. Failure of any single cell can affect the operation of the entire energy storage system. Therefore, ensuring the safe, reliable, and efficient operation of energy storage systems is a critical technology for large-scale energy storage systems.

[0003] A prior art patent application with application number 202410542448.X discloses a scalable modular string energy storage system, including: multiple energy storage units arranged side by side; each energy storage unit includes a stacked thermal management module, control module, and battery module. By setting the energy storage units as modular thermal management modules, control modules, and battery modules, flexible modular combination is achieved, and each unit is individually controlled and cooled, making each energy storage unit highly independent. However, in actual use, because each energy storage power supply's thermal management module, control module, and battery module are connected by a through connecting rod, cooling pipe, electrical connector, and control signal line, when a battery module (or control module) is damaged, or when adding or removing battery modules from the bottom of a battery module, workers need to disassemble and remove multiple modules on the top of that battery module (or control module) one by one. This operation is cumbersome and time-consuming, affecting the power supply effect of the energy storage device. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a scalable modular energy storage unit, energy storage device and method.

[0005] A scalable modular energy storage unit includes an energy storage unit, the energy storage unit comprising stacked thermal management modules, at least one battery module, a control module, and a mounting base; and further includes: A circulating cooling pipeline is provided, through which the thermal management module is connected to the battery module and the control module. The circulating cooling pipeline forms a loop between the control module and the battery module, and is used to provide cooling and / or heating to the control module and the battery module. The circulating cooling pipeline includes several cooling pipe assemblies, which are respectively disposed between the thermal management module and the uppermost battery module, between two adjacent battery modules, and between the control module and the lowermost battery module. The connector adopts a plug structure and is provided in multiple sets to realize the series and parallel connection between multiple battery modules in the same energy storage unit. The multiple sets of the connector are respectively arranged between the thermal management module and the top battery module, between two adjacent battery modules, and between the control module and the bottom battery module. The mounting base is provided with a separation mechanism for the displacement of the thermal management module or the battery module. There are operating areas for the separation mechanism to work between the thermal management module and the uppermost battery module, between two adjacent battery modules, and between the control module and the lowermost battery module.

[0006] Preferably, the connector includes a convex plug on the upper side and a socket that mates with the convex plug. The convex plug is located at the bottom of the thermal management module and the battery module, and the socket is located at the top of the control module and the battery module.

[0007] Preferably, the socket has a fixing groove, a positioning block is slidably connected in the fixing groove, a first elastic element is provided between the positioning block and the inner wall of the fixing groove, a pressing slope is provided at the end of the positioning block away from the first elastic element, and a positioning groove that cooperates with the positioning block is provided on the convex plug.

[0008] Preferably, each of the cooling pipe assemblies includes an upper pipe and a lower pipe. The bottom of the upper pipe is provided with a conical groove, and the top of the lower pipe is provided with a conical head that mates with the conical groove. The inner wall of the conical groove is provided with a sealing ring that moves against the conical head.

[0009] Preferably, both the upper and lower connecting pipes are provided with a fixing plate on their inner walls, an elastic telescopic rod is fixedly provided on the fixing plate, a blocking block is fixedly provided at the end of the elastic telescopic rod away from the fixing plate, and a top rod is fixedly provided in the blocking block in the upper connecting pipe to move against the blocking block in the lower connecting pipe.

[0010] Preferably, a sleeve is fixedly provided on the outer side of the lower connecting pipe, a driven gear is rotatably connected to the top of the sleeve, a threaded tube is slidably connected to the driven gear, the threaded tube is slidably disposed with the driven gear keyway, and the threaded tube is threadedly connected to the upper connecting pipe and the lower connecting pipe.

[0011] Preferably, a pull rope is fixed to the bottom of the spiral tube, and the end of the pull rope away from the spiral tube passes through the sleeve and the socket and is connected to the positioning block.

[0012] Preferably, the separation mechanism includes a bidirectional screw rotatably connected to the mounting base, a first sleeve threaded to both ends of the bidirectional screw, a threaded rod rotatably connected to each of the first sleeves, a second sleeve threaded to the threaded rod, a U-shaped frame fixedly connected to the second sleeve, and a rack plate disposed on the U-shaped frame and meshing with the driven gear. The U-shaped frame is also provided with a pressure plate.

[0013] The present invention also discloses an energy storage device, comprising a plurality of the aforementioned scalable modular energy storage units, and a base. The mounting seats of the plurality of energy storage units are arranged sequentially along the length of the base. Each mounting seat has a connecting seat at its bottom. The connecting seat of the first mounting seat on the base is fixedly connected to the base, and the remaining connecting seats are slidably connected to the base. A hinge frame is provided between two adjacent connecting seats. An electric push rod is fixedly mounted on the base via a support plate. The telescopic rod of the electric push rod is fixedly connected to the connecting seat of the upper end mounting seat on the base, and a guide rod is provided on the upper end mounting seat of the base and slidably connected to the base.

[0014] The present invention also discloses a method of using the energy storage device described above, which further includes the following steps: S1: Module stacking assembly: The control module is placed on the mounting base as the base layer, and the battery modules are stacked as needed. The thermal management module is installed on top. The electrical series and parallel connection between the stacked modules is realized through the convex plug and socket of the connector. After the coolant is regulated by the thermal management module, it forms a closed loop between the battery module and the control module through the cooling pipe assembly. S2: Module disassembly phase: Unlocking phase: Rotate the bidirectional screw to position the second sleeve and the U-shaped frame at the target module height. Then rotate the bidirectional screw and move the two first sleeves towards each other, so that the two U-shaped frames on both sides move closer to each other and gradually wrap around the target module. As the U-shaped frame moves toward the target module, the rack plate drives the driven gear to rotate, the solenoid moves down to disengage from the upper pipe and contact the lock between the upper and lower pipes of the cooling pipe assembly; at the same time, the pull rope applies tension to the positioning block, causing the positioning block to retract into the positioning groove and release the lock between the convex plug and the socket. S3: Module replacement: Rotate the threaded rod to lift the target module as a whole through the U-shaped frame, so that it is separated from the upper and lower modules. The connectors of other modules remain in the docking state. After the U-shaped frame lifts the target module to the point of being detached from the stack, the module can be replaced or added. S4: Reset and Lock: The U-shaped frame, in conjunction with the pressure plate, lowers the new module, while the reverse operation of the separation mechanism resets the module stack. The spiral tube is screwed back on and reconnected to the upper connecting pipe thread to achieve matching and connection of the cooling pipe assembly; The positioning block springs into the positioning slot to lock the convex plug and socket, completing the electrical connection.

[0015] As can be seen from the above technical solutions, the present invention has the following beneficial effects: This invention integrates the processes of disconnecting cooling pipes, unlocking electrical connections, and separating modules, enabling rapid replacement of single modules and avoiding the time-consuming traditional layer-by-layer disassembly and assembly. It is suitable for rapid deployment and sustainable operation and maintenance in large-scale energy storage scenarios. The mechanical linkage between disconnecting cooling pipes and unlocking electrical connections improves work efficiency and reduces failure rate compared to existing battery module replacement methods. This facilitates reducing the manpower and time costs required for maintenance, and the high interchangeability of modules reduces spare parts inventory pressure. Furthermore, it supports online addition and removal of battery modules to adapt to changes in capacity requirements.

[0016] In this invention, by rotating the threaded rod, the second sleeve drives the U-shaped frame to move axially along the threaded rod, adjusting the height of the U-shaped frame so that it is basically the same as the height of the battery module to be replaced. This adapts to the disassembly and replacement of battery modules in different positions. Subsequently, rotating the bidirectional screw causes the first sleeves at both ends of the bidirectional screw to move closer to each other, thereby causing the first sleeves to drive the threaded rod and the U-shaped frame closer to the battery module, placing the battery module to be replaced inside the U-shaped frame. This allows the U-shaped frame to unlock and lift the battery module to be replaced, solving the problem of having to disassemble the remaining battery modules above the battery module to be replaced one by one in the prior art, thus improving the efficiency of battery module replacement.

[0017] In this invention, when the U-shaped frame moves towards the position of the module to be replaced, the rack plate meshes with the driven gear at the lower connecting pipe on the upper and lower sides of the battery module to be replaced. The driven gear drives the solenoid to rotate, causing the solenoid to move downward relative to the upper and lower connecting pipes. Ultimately, the solenoid is no longer sleeved on the outside of the upper connecting pipe, thus releasing the docking relationship between the cooling pipe assembly pipes when unlocking the electrical connection, so that the module to be replaced can be separated from the cooling pipe assembly of the other modules. During normal use, the cooling pipe assembly is connected by the threads of the upper and lower connecting pipes, which facilitates the sealing of the cooling pipe assembly and ensures its cooling effect.

[0018] In this invention, when the solenoid moves downward, a force is applied to the pull rope, causing the pull rope to pull the positioning block. The positioning block retracts into the fixing groove, and the first elastic element is compressed, so that the positioning block no longer positions the convex plug, releasing the restrictive relationship between the convex plug and the socket, so that the module to be replaced can be effectively separated from the upper and lower side modules. When the connector is in normal use, the convex plug and the socket are inserted and then limited by the positioning block, which can ensure the stability of the connector connection, prevent the modules from loosening after connection, and ensure the stable operation of the energy storage device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the connection structure of multiple energy storage unit mounting bases according to the present invention; Figure 3 This is a schematic diagram of the energy storage unit of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram of section A in the middle; Figure 5 This is a cross-sectional structural diagram of the mounting base of the present invention; Figure 6 This is a schematic diagram of the thermal management module, battery module, and control module of the present invention; Figure 7 This is a partial structural schematic diagram of the battery module of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram of section B; Figure 9 This is a cross-sectional structural diagram of the cooling pipe assembly of the present invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram of section C; Figure 11 This is a schematic diagram of the battery module of the present invention placed inside the U-shaped frame.

[0020] In the diagram: 1. Thermal management module; 2. Battery module; 3. Control module; 4. Mounting base; 5. Circulating cooling pipe; 6. Connector; 601. Protruding plug; 6011. Positioning groove; 602. Socket; 6021. Fixing groove; 6022. Positioning block; 6023. First elastic element; 7. Upper connecting pipe; 701. Conical groove; 7011. Sealing ring; 8. Lower connecting pipe; 801. Conical head; 9. Fixing plate; 90 1. Elastic telescopic rod; 902. Block; 903. Top rod; 10. Sleeve; 1001. Driven gear; 1002. Screw tube; 11. Pull rope; 12. Double-acting screw; 121. First sleeve; 122. Threaded rod; 123. Second sleeve; 124. U-shaped frame; 125. Rack plate; 126. Pressure plate; 13. Base; 131. Electric push rod; 132. Guide rod; 14. Connecting seat; 141. Hinge frame. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions: Reference Figure 1 , Figure 3 , Figure 6 and Figure 7 A scalable modular energy storage unit includes an energy storage unit comprising a stacked thermal management module 1, at least one battery module 2, a control module 3, and a mounting base 4. The thermal management module 1, battery module 2, and control module 3 are vertically stacked and fixed by the mounting base 4, forming a compact unitized layout. The mounting base 4 has a mounting slot for placing the control module 3. The control module 3 contains electrical components, which are existing technology, and these components are connected to the thermal management module 1 and battery module 2. The unit also includes: The circulating cooling pipe 5 connects the thermal management module 1 to the battery module 2 and the control module 3. The circulating cooling pipe 5 forms a loop between the control module 3 and the battery module 2, providing cooling and / or heating to the control module 3 and the battery module 2 to achieve uniform distribution of cooling / heating and ensure consistent temperature control. The circulating cooling pipe 5 includes several cooling pipe assemblies, which are respectively arranged between the thermal management module 1 and the uppermost battery module 2, between two adjacent battery modules 2, and between the control module 3 and the lowermost battery module 2. Connector 6, which adopts a plug structure and has multiple sets, includes electrical connection components for connecting battery modules 2 in series and parallel, and connecting them to the control module 3 to achieve voltage superposition and current convergence between battery modules 2. Connector 6 also includes control signal lines that connect battery modules 2 and thermal management module 1 to the control module 3, enabling orderly control of the operation of each branch and component, and subsequent transmission to the background for monitoring and management. Multiple sets of connectors 6 are respectively located between thermal management module 1 and the topmost battery module 2, between two adjacent battery modules 2, and between control module 3 and the bottommost battery module 2. The plug structure of connector 6 supports rapid series and parallel connection of two adjacent modules without additional wiring. The mounting base 4 is equipped with a separation mechanism for the displacement of the thermal management module 1 or the battery module 2. There are operating areas for the separation mechanism to work between the thermal management module 1 and the uppermost battery module 2, between two adjacent battery modules 2, and between the control module 3 and the lowermost battery module 2. The vertical displacement of the module at a specific position is controlled through the operating area to realize the independent disassembly or addition of a single module. Specifically, taking the replacement of a battery module 2 as an example, the operation of the target energy storage unit is stopped, the separation mechanism is activated, and the adjacent interface of the target battery module 2 is accessed through the operation area; the separation mechanism pushes the target module to move, causing the plug-in connector 6 to disengage, and the cooling pipe assembly to separate simultaneously, vertically lifting the faulty module away from the stack; a new module is replaced or a module is added or removed. After the new module is in place, the separation mechanism operates in reverse to push the module to reset; the plug structure of the connector 6 is precisely aligned and locked, and the cooling pipes are reconnected; there is no need to disassemble the entire module stack, shortening the replacement time of a single module, supporting online expansion (adding or removing battery module 2), adapting to dynamic capacity requirements, solving the problems of cumbersome maintenance and poor scalability of traditional energy storage systems, greatly improving operation and maintenance efficiency, and suitable for rapid deployment and sustainable operation in scenarios such as large-scale energy storage power stations and industrial and commercial energy storage.

[0025] Reference Figure 4 , Figure 6 , Figure 7 and Figure 8As a preferred technical solution in this embodiment, the connector 6 includes a convex plug 601 on the upper side and a socket 602 that mates with the convex plug 601. The bottom of the thermal management module 1 and each battery module 2 are provided with convex plugs 601 as active connection ends; the top of the control module 3 and the battery module 2 are provided with sockets 602 as passive connection ends, forming a vertical plug-in fit with the convex plug 601. When the connector 6 is docking, the upper module is pressed down, and the convex plug 601 is inserted into the socket 602. The plug-in connection requires no tools, enabling quick module replacement and minimizing system downtime. Furthermore, the contacts of the convex plug 601 and the socket 602 are silver-plated, with a contact resistance of <0.1mΩ, avoiding overheating losses. It should be noted that, in order to ensure the connection stability between the convex plug 601 and the socket 602, the socket 602 is provided with a fixing groove 6021, a positioning block 6022 is slidably connected in the fixing groove 6021, a first elastic element 6023 is provided between the positioning block 6022 and the inner wall of the fixing groove 6021, a pressing slope is provided at the end of the positioning block 6022 away from the first elastic element 6023, and a positioning groove 6011 is provided on the convex plug 601 to cooperate with the positioning block 6022; Specifically, when the convex plug 601 is inserted into the socket 602, the pressing inclined surface contacts the positioning block 6022; the inclined surface converts the vertical downward pressure into a horizontal component force, pushing the positioning block 6022 to retract into the fixing groove 6021. When the convex plug 601 is fully inserted, the positioning groove 6011 aligns with the positioning block 6022, and the first elastic element 6023 releases its elastic force, pushing the positioning block 6022 to spring into the positioning groove 6011.

[0026] Reference Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 9 As a preferred technical solution in this embodiment, each cooling pipe assembly includes an upper pipe 7 and a lower pipe 8. The upper pipe 7 is disposed on the lower side of the module, and the lower pipe 8 is disposed on the upper side of the module. A tapered groove 701 is provided at the bottom of the upper pipe 7, and a tapered head 801 that cooperates with the tapered groove 701 is provided at the top of the lower pipe 8. A sealing ring 7011 that moves against the tapered head 801 is provided on the inner wall of the tapered groove 701. Specifically, when the conical head 801 is inserted into the conical groove 701, the sealing ring 7011 is compressed and undergoes radial deformation. The sealing ring 7011 is made of silicone rubber, which fills the microscopic uneven surface to form a sealing barrier. The sealing ring 7011 adopts a double-lip design. When the pipeline is separated, the conical surface detaches, causing the sealing ring 7011 to automatically rebound, avoiding adhesion and wear. The cooling pipe assembly and the connector 6 are arranged in parallel to achieve synchronous mechanical, electrical, and fluid connection / separation. It should be noted that both the upper pipe 7 and the lower pipe 8 of the cooling pipe assembly have parts of the pipe body inside the module, and this pipe body can be arranged around the inside of the module to ensure the heat exchange or cooling operation of the cooling pipe assembly for the module.

[0027] Reference Figure 7 and Figure 9 As a preferred technical solution in this embodiment, a fixing plate 9 is provided on the inner wall of both the upper pipe 7 and the lower pipe 8. An elastic telescopic rod 901 is fixed on the fixing plate 9. A block 902 is fixed at the end of the elastic telescopic rod 901 away from the fixing plate 9. A top rod 903 is fixed in the block 902 in the upper pipe 7 to move and abut against the block 902 in the lower pipe 8. Specifically, during the initial contact phase, the upper pipe 7 moves downward, causing the push rod 903 to contact the block 902 of the lower pipe 8. The push rod 903 overcomes the resistance of the elastic telescopic rod 901, pushing the lower block 902 downward. As the block 902 of the lower pipe 8 moves downward and opens the flow channel, the reaction force is transmitted to the upper pipe 7 through the push rod 903. The block 902 of the upper pipe 7 moves upward and opens simultaneously. Both blocks 902 disengage from the pipe opening, and the two pipes are simultaneously connected, ensuring the normal flow of fluid in the cooling pipe assembly. The strength coefficient of the elastic telescopic rod 901 can prevent the block 902 from loosening during disassembly. When separated, the upper pipe 7 is lifted to disengage the push rod 903 from the lower plug 902. The elastic telescopic rod 901 rebounds instantly, pushing the plug 902 to complete the pipe opening seal. The upper and lower plugs 902 seal their respective pipe openings under the action of spring force, blocking the flow of fluid in the pipe and sealing the cooling pipe assembly to prevent external impurities from entering the pipe.

[0028] Reference Figure 6 , Figure 7 , Figure 9 and Figure 10 As a preferred technical solution in this embodiment, a sleeve 10 is fixedly provided on the outside of the lower pipe 8, and a driven gear 1001 is rotatably connected to the top of the sleeve 10. A threaded tube 1002 is slidably connected to the driven gear 1001. The threaded tube 1002 is slidably disposed with the driven gear 1001 via a keyway. The threaded tube 1002 is threadedly connected to the upper pipe 7 and the lower pipe 8. The threaded connection has a better sealing effect than the existing snap-fit ​​structure with spring. Specifically, when the separation mechanism is working, the separation mechanism drives the driven gear 1001 on the outside of the sleeve 10 to rotate. The driven gear 1001 drives the solenoid 1002 to rotate, causing the solenoid 1002 to spiral downward from the upper pipe 7, releasing the locking state between the upper pipe 7 and the lower pipe 8. When the upper pipe 7 and the lower pipe 8 are reconnected, the separation mechanism resets, causing the driven gear 1001 to drive the solenoid 1002 to rotate in the opposite direction. The solenoid 1002 spirals upward and connects with the upper pipe 7, further improving the sealing and stability of the connection between the upper pipe 7 and the lower pipe 8.

[0029] Reference Figure 3 , Figure 4 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As a preferred technical solution in this embodiment, a pull rope 11 is fixed at the bottom of the screw tube 1002. The pull rope 11 is made of wear-resistant and corrosion-resistant material. The end of the pull rope 11 away from the screw tube 1002 passes through the sleeve 10 and the socket 602 and is connected to the positioning block 6022. Specifically, when the modules are separated, the solenoid 1002 moves downward relative to the upper connecting pipe 7, and the solenoid 1002 applies a pulling force to the pull rope 11, causing the pull rope 11 to pull the positioning block 6022, overcoming the elastic force of the first elastic element 6023, causing the positioning block 6022 to exit the positioning groove 6011 and retract into the fixing groove 6021, thus releasing the mechanical lock of the connector 6; when the modules are docked, the solenoid 1002 moves upward to release the pulling force on the pull rope 11, and the first elastic element 6023 pushes the positioning block 6022 to reset, causing the positioning block 6022 to... Inserted into the positioning slot 6011, the connector 6 is locked. It should be noted that the bottom of the solenoid 1002 should be set with a rotating ring connected to the pull rope 11 to prevent the pull rope 11 from rotating when the solenoid 1002 rotates, which would cause the pull rope 11 to become taut and break. The pull rope 11 only moves up or down with the solenoid 1002. If the sampling electromagnetic locking relies on power supply and electronic components, it is prone to failure in high temperature, high humidity or electromagnetic interference environments. The pull rope 11 linkage structure achieves action through pure mechanical transmission, without the risk of circuit failure, and is more suitable for harsh industrial environments.

[0030] Reference Figure 1 , Figure 3 , Figure 5 and Figure 11 As a preferred technical solution in this embodiment, the separation mechanism includes a bidirectional screw 12 rotatably connected to the mounting base 4, a first sleeve 121 threadedly connected to both ends of the bidirectional screw 12, a threaded rod 122 rotatably connected to each of the first sleeves 121, a second sleeve 123 threadedly connected to the threaded rod 122, a U-shaped frame 124 fixedly connected to the second sleeve 123, and a rack plate 125 disposed on the U-shaped frame 124 and meshing with the driven gear 1001. A pressure plate 126 is also disposed on the U-shaped frame 124. Specifically, the rotating threaded rod 122 drives the second sleeve 123 to rise and fall, aligning the U-shaped frame 124 with the target module. It should be noted that the threaded rods 122 on both sides must be strictly synchronized to avoid asynchronous movement that could cause the module to rise on one side first, resulting in shearing damage to the connector. Then, the bidirectional screw 12 is driven to rotate, causing the first sleeves 121 on both sides to move the U-shaped frame 124 towards the target module. When the rack plate 125 moves towards the target module, it engages with the driven gear 1001, driving the solenoid tube 1002 to rotate and move downwards. Simultaneously, the positioning block 6022 is triggered by the pull rope 11 to unlock the electrical connection. Then, the threaded rod 122 is rotated, causing the U-shaped frame 124 to rise at a uniform speed under the drive of the threaded rod 122. The pressure plate 126 simultaneously lifts the stacked module group on the upper side. After the U-shaped frame 124 lifts the target module until it is detached from the stack, modules can be replaced or added / removed. The module adjustment is then complete. Then, the U-shaped frame 124 is lowered to the installation position. The U-shaped frame 124, together with the upper pressure plate 126, presses down on the battery module 2, causing the raised battery module 2's bottom convex plug 601 and upper pipe 7 to press down on the lower battery module 2's top socket 602 and lower pipe 8, causing the battery modules 2 to be reassembled and stacked. Then, the bidirectional screw 12 is controlled to rotate, causing the two first sleeves 121 to move away from each other. During this period, the rack plate 125 on the U-shaped frame 124 meshes with the driven gear 1001, causing the screw tube 1002 to rotate and move upward and screw onto the upper pipe 7, realizing the overlap of the cooling pipe assembly's upper pipe 7 and lower pipe 8. When the screw tube 1002 moves upward, it no longer pulls the positioning block 6022 through the pull rope 11, causing the positioning block 6022 to be inserted into the positioning groove 6011 under the action of elasticity, locking the connection state between the battery modules 2.

[0031] Reference Figure 1 , Figure 2 and Figure 3 The present invention also discloses an energy storage device, including multiple of the aforementioned scalable modular energy storage units, and a base 13. The mounting seats 4 of the multiple energy storage units are arranged sequentially along the length of the base 13. Each mounting seat 4 has a connecting seat 14 at its bottom. The connecting seat 14 of the first mounting seat 4 on the base 13 is fixedly connected to the base 13, and the remaining connecting seats 14 are slidably connected to the base 13. A hinge frame 141 is provided between two adjacent connecting seats 14. An electric push rod 131 is fixedly provided on the base 13 through a support plate. The telescopic rod of the electric push rod 131 is fixedly connected to the connecting seat 14 of the upper end mounting seat 4 on the base 13. A guide rod 132 is provided on the upper end mounting seat 4 of the base 13 and is slidably connected to the base 13. Specifically, the energy storage device is composed of multiple energy storage units, and adjacent energy storage units are connected in series and parallel through wires. When it is necessary to replace or add or remove modules of the energy storage unit in the middle part, the electric push rod 131 is controlled to run, so that the electric push rod 131 is stretched. The electric push rod 131 pushes the connecting seat 14 at its end to move. The mounting seat 4 connected to the connecting seat 14 is slidably set with the base 13 through the guide rod 132. As the connecting seat 14 is displaced, the adjacent connecting seats 14 are displaced under the action of the hinge frame 141, thereby expanding the distance between the energy storage units, freeing up working space around the energy storage unit in the middle part, and increasing the space distance between the front and rear sides of the energy storage unit, so that the staff can separate and lift the modules through the separation mechanism to take out and put in the modules.

[0032] The present invention also discloses a method for using an energy storage device, which further includes the following steps: S1: Module stacking assembly: The control module 3 is placed on the mounting base 4 as the base layer, and the battery modules 2 are stacked as needed. The thermal management module 1 is installed on the top. The electrical series and parallel connection between the stacked modules is realized through the convex plug 601 and socket 602 of the connector 6. After the coolant is regulated by the thermal management module 1, a closed loop is formed between the battery module 2 and the control module 3 through the cooling pipe assembly. S2: Module disassembly phase: Unlocking phase: Rotate the bidirectional screw 12 to make the second sleeve 123 drive the U-shaped frame 124 to be positioned at the target module height. Then rotate the bidirectional screw 12 and drive the two first sleeves 121 to move towards each other, so that the two U-shaped frames 124 on both sides move closer to each other and gradually wrap around the target module. As the U-shaped frame 124 moves toward the target module, the rack plate 125 drives the driven gear 1001 to rotate, and the solenoid 1002 moves down to disengage from the upper pipe 7 and contact the lock between the upper pipe 7 and the lower pipe 8 of the cooling pipe assembly; at the same time, the pull rope 11 applies a pulling force to the positioning block 6022, causing the positioning block 6022 to retract into the positioning groove 6011, thereby releasing the lock between the convex plug 601 and the socket 602. S3: Module replacement: Rotate the threaded rod 122 so that the second sleeve 123 lifts the target module as a whole through the U-shaped frame 124, so that it is separated from the upper and lower modules. The connectors 6 of other modules remain in the docking state. After the U-shaped frame 124 lifts the target module to the point of being separated from the stack, the module can be replaced or added. S4: Reset and Lock: U-shaped frame 124, together with pressure plate 126, lowers the new module, and reverses the separation mechanism to reset the module stack; The spiral tube 1002 is screwed on and reconnected to the upper pipe 7 thread to achieve matching and connection of the cooling tube assembly; The positioning block 6022 pops into the positioning groove 6011 to lock the convex plug 601 and the socket 602, thus completing the electrical connection.

[0033] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A scalable modular energy storage unit comprising an energy storage unit, characterized in that, The energy storage unit comprises a heat management module (1), at least one battery module (2), a control module (3) and a mounting seat (4) arranged in stacks; further comprising: A circulating cooling pipeline (5) is connected between the heat management module (1), the battery module (2) and the control module (3), and forms a loop between the control module (3) and the battery module (2) for providing cold and / or heat to the control module (3) and the battery module (2), and the circulating cooling pipeline (5) comprises a plurality of cooling pipe assemblies arranged between the heat management module (1) and the uppermost battery module (2), between two adjacent battery modules (2) and between the control module (3) and the lowermost battery module (2); A connecting piece (6) is provided in a plurality of groups in a plug structure for realizing series and parallel connection between a plurality of battery modules (2) of the same energy storage unit, and the connecting pieces (6) are arranged between the heat management module (1) and the uppermost battery module (2), between two adjacent battery modules (2) and between the control module (3) and the lowermost battery module (2); The mounting seat (4) is provided with a separation mechanism for displacement of the heat management module (1) or the battery module (2), and the heat management module (1), the uppermost battery module (2), the two adjacent battery modules (2) and the control module (3) and the lowermost battery module (2) are provided with an operation area for operation of the separation mechanism.

2. An expandable modular energy storage unit according to claim 1, wherein, The connecting piece (6) comprises a male plug (601) on the upper side and a socket (602) matched with the male plug (601), the male plug (601) is arranged at the bottom of the heat management module (1) and the battery module (2), and the socket (602) is arranged at the top of the control module (3) and the battery module (2).

3. An expandable modular energy storage unit according to claim 2, wherein, A fixing groove (6021) is formed on the socket (602), a positioning block (6022) is slidably connected in the fixing groove (6021), a first elastic element (6023) is arranged between the positioning block (6022) and the inner wall of the fixing groove (6021), an extrusion inclined surface is formed on the end of the positioning block (6022) away from the first elastic element (6023), and a positioning groove (6011) matched with the positioning block (6022) is formed on the male plug (601).

4. An expandable modular energy storage unit according to claim 3, wherein, Each cooling pipe assembly comprises an upper connecting pipe (7) and a lower connecting pipe (8), a tapered groove (701) is formed at the bottom of the upper connecting pipe (7), a tapered head (801) matched with the tapered groove (701) is arranged at the top of the lower connecting pipe (8), and a sealing ring (7011) movably abutting against the tapered head (801) is arranged on the inner wall of the tapered groove (701).

5. An expandable modular energy storage unit according to claim 4, wherein, The upper connector (7) and the lower connector (8) are provided with fixed plates (9) on the inner walls, the fixed plates (9) are fixedly provided with elastic telescopic rods (901), one end of the elastic telescopic rod (901) away from the fixed plate (9) is fixedly provided with a plug (902), and the plug (902) in the upper connector (7) is fixedly provided with a top rod (903) movably abutting against the plug (902) in the lower connector (8).

6. An expandable modular energy storage unit according to claim 5, wherein, The lower connector (8) is fixedly provided with a sleeve (10) on the outside, the top of the sleeve (10) is rotatably connected with a driven gear (1001), the driven gear (1001) is slidably connected with a screw pipe (1002), the screw pipe (1002) is slidably arranged in the key groove of the driven gear (1001), and the screw pipe (1002) is threadedly connected with the upper connector (7) and the lower connector (8).

7. An expandable modular energy storage unit according to claim 6, wherein, The bottom of the screw pipe (1002) is fixedly provided with a pull rope (11), one end of the pull rope (11) away from the screw pipe (1002) penetrates through the sleeve (10) and the socket (602) and is connected with the positioning block (6022).

8. An expandable modular energy storage unit according to claim 7, wherein, The separation mechanism comprises a bidirectional screw rod (12) rotatably connected to the mounting seat (4), first sleeves (121) threadedly connected to two ends of the bidirectional screw rod (12), threaded rods (122) rotatably connected to each first sleeve (121), second sleeves (123) threadedly connected with the threaded rods (122), U-shaped frames (124) fixedly connected with the second sleeves (123), and rack plates (125) arranged on the U-shaped frames (124) and meshing with the driven gear (1001), and the U-shaped frames (124) are further provided with pressing plates (126).

9. An energy storage device comprising a plurality of the scalable modular energy storage units of claim 8, wherein, The base (13) is further provided with a plurality of mounting seats (4) arranged along the length direction of the base (13), the bottom of each mounting seat (4) is provided with a connecting seat (14), the connecting seat (14) of the first mounting seat (4) on the base (13) is fixedly connected with the base (13), the remaining connecting seats (14) are slidably connected with the base (13), a hinged frame (141) is arranged between two adjacent connecting seats (14), an electric push rod (131) is fixedly arranged on the base (13) through a support plate, the extension rod of the electric push rod (131) is fixedly connected with the connecting seat (14) of the last mounting seat (4) on the base (13), and a guide rod (132) slidably connected with the base (13) is arranged on the last mounting seat (4) on the base (13).

10. A method of using the energy storage device of claim 9, wherein, The following steps are further included: S1: module stacking assembly: The control module (3) is placed on the mounting seat (4) as a basic layer, the battery module (2) is stacked as needed, the thermal management module (1) is installed on the top, the electrical series and parallel connection between the stacked modules is realized through the male plug (601) of the connecting piece (6) and the socket (602), and the cooling liquid is adjusted in temperature by the thermal management module (1), and then forms a closed loop between the battery module (2) and the control module (3) through the cooling pipe assembly; S2: module disassembly stage: Unlocking stage: rotating the bidirectional screw rod (12) to make the second sleeve (123) drive the U-shaped frame (124) to position to the target module height, then rotate the bidirectional screw rod (12) to drive the two first sleeves (121) to move towards each other, so that the two U-shaped frames (124) gradually wrap the target module; When the U-shaped frame (124) moves towards the target module, the rack plate (125) drives the driven gear (1001) to rotate, the spiral tube (1002) moves down to disengage the upper connector (7), and contacts the locking between the upper connector (7) and the lower connector (8) of the cooling pipe assembly; At the same time, the pull rope (11) applies tension to the positioning block (6022), so that the positioning block (6022) retracts into the positioning groove (6011), releasing the locking between the male plug (601) and the socket (602); S3: Module replacement: Rotate the threaded rod (122) to make the second sleeve (123) lift the target module as a whole through the U-shaped frame (124), so that it is separated from the upper and lower modules, and the connecting pieces (6) of other modules remain in the state of butt joint. After the U-shaped frame (124) lifts the target module to separate from the stack, the module is replaced or increased or decreased; S4: Reset and locking: The U-shaped frame (124) cooperates with the pressing plate (126) to lower the new module, and the reverse operation of the separation mechanism makes the module stack reset; The spiral tube (1002) is screwed up to be screwed with the upper connector (7) again, realizing the matching butt joint of the cooling pipe assembly; The positioning block (6022) is locked into the positioning groove (6011) to lock the male plug (601) and the socket (602), completing the electrical connection.

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