Container energy storage device with liquid cooling function

Abstract

The utility model discloses a container energy storage device with liquid cooling function, including container, be equipped with energy storage frame in the container, be equipped with liquid cooling refrigeration system and a plurality of liquid cooling battery box on the energy storage frame, refrigeration conveying device is fixed in the container, and refrigeration conveying device is connected with liquid inlet pipe and liquid outlet pipe, liquid inlet joint and liquid outlet joint, draft tube, liquid inlet pipe, liquid outlet pipe all are connected with electric valve, located electric valve's fluid upstream side, all are equipped with operating cavity, be equipped with adjusting assembly in operating cavity, the utility model solves the drawback that only power off but cannot prevent liquid leakage in traditional scheme, greatly curb the leakage range expansion, avoided the risk intensification of secondary electrical short circuit, equipment internal corrosion damage, environmental pollution, ground wet slip causes personal accident and potential fire hazard because of coolant continuous seepage, significantly improved the intrinsic safety and fault controllability of system.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling technology for energy storage containers, specifically a container energy storage device with liquid cooling function. Background Technology

[0002] An energy storage container is an integrated energy storage device that combines various energy storage technologies with an intelligent control system to achieve efficient energy storage and release. Chinese Patent No. CN202420729615.7 relates to a containerized liquid-cooled energy storage device, comprising a 20-foot container. The 20-foot container houses a PACK module, a PCS high-voltage integrated box on its side, a liquid cooling system on its side, and a power distribution cabinet near the liquid cooling system. Connecting seats are located around the bottom and top of the 20-foot container. This invention provides power through the PACK module, which is the most important component of the energy storage system. The battery management system in the power distribution cabinet is mainly responsible for battery monitoring, evaluation, protection, and balancing. The energy management system in the power distribution cabinet is responsible for data acquisition, network monitoring, and energy dispatching. It can achieve 5MWh AC output in the 20-foot container's energy storage system, solving the circulating current problem of DC parallel connection and eliminating energy loss from multiple DC-to-AC conversions.

[0003] Based on the above, the inventors have discovered the following problems: The above-mentioned device achieves 5MWh AC output in a 20-foot container energy storage system, solves the circulating current problem of DC parallel connection, and eliminates the energy loss of multiple DC to AC conversion; however, this solution has oversights in the risk consideration of thermal management safety, which is crucial for energy storage containers, especially the liquid cooling solution; current mainstream container energy storage systems generally rely on heat dissipation design to ensure safe operation, among which liquid cooling solution is widely used due to its excellent cooling efficiency; however, liquid cooling system has potential leakage risks; once a leakage occurs, it may not only lead to system failure, but also cause significant economic losses. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: a containerized energy storage device with liquid cooling function, comprising a container, an energy storage rack inside the container, a liquid cooling system and several liquid-cooled battery boxes on the energy storage rack; the liquid cooling system includes a cooling delivery device, which is fixedly installed inside the container, and is connected to an inlet pipe and a drain pipe, wherein the inlet pipe is used to deliver coolant to the liquid-cooled battery boxes, and the drain pipe is used to recover coolant from the liquid-cooled battery boxes; the inlet pipe and the drain pipe are respectively... A plurality of guide pipes are connected in a continuous manner; the guide pipe on the liquid inlet pipe is provided with a plurality of liquid inlet connectors, and the guide pipe on the liquid outlet pipe is provided with a plurality of liquid outlet connectors; each liquid-cooled battery box is provided with a pair of connection ports, which are respectively connected to one of the liquid inlet connectors and one of the liquid outlet connectors; the liquid inlet connectors and the liquid outlet connectors, the guide pipes, the liquid inlet pipes, and the liquid outlet pipes are all connected to electric valves; on the inner wall of the liquid inlet connectors and the liquid outlet connectors, the guide pipes, the liquid inlet pipes, and the liquid outlet pipes, on the fluid upstream side of the electric valves, an operating chamber is provided, and an adjustment component is provided in the operating chamber.

[0005] Furthermore, the adjustment assembly includes a leakage current protection switch, a conductive wire, an electromagnetic coil, a metal column, a limit column, a push rod, a spring, a fixed plate, a valve reversing switch, and a push plate; the conductive wire is embedded in the inner wall of the inlet pipe, outlet pipe, guide pipe, inlet connector, and outlet connector, and the conductive wire is electrically connected to each other and connected to the leakage current protection switch, which is located on the inner wall of the container; the electromagnetic coil is located in the operating cavity and is connected to the conductive wire; the metal column is located along the axial direction of the electromagnetic coil, and the end of the metal column away from the electric valve is slidably sleeved on the limit column fixed to the inner wall of the operating cavity; the push rod is connected to the end of the metal column near the electric valve; the spring is sleeved on the push rod; the fixed plate is located in the operating cavity, and a through hole is opened on the fixed plate, through which the push rod passes; the push plate is located at the end of the push rod facing the electric valve; the electric valve is electrically connected to the valve reversing switch, and the position of the push plate corresponds to the valve reversing switch.

[0006] Furthermore, an insulating layer is provided between the inner wall of the inlet pipe, outlet pipe, guide pipe, inlet connector, and outlet connector and the conductive wire.

[0007] Furthermore, the magnetic attraction force generated by the electromagnetic coil on the metal column when energized is greater than the elastic force of the spring.

[0008] Furthermore, coolant flows through the inlet pipe, outlet pipe, and guide pipe.

[0009] Furthermore, the liquid-cooled battery box has a chamber for placing the battery.

[0010] Furthermore, one end of the spring is fixedly connected to the fixed plate, and the other end of the spring is connected to the bottom end of the metal column.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the container energy storage device with liquid cooling function is reasonable and has the following advantages: (1) Through the design of the conductive wire, this device forms a continuously energized low-voltage monitoring circuit under normal working conditions, which enables it to have instantaneous fault detection capability; once the pipeline is damaged due to cracks or other reasons, the conductive coolant seeps out and comes into contact with the conductive wire buried in the inner wall of the pipeline, which will immediately cause leakage or short circuit in the monitoring circuit; leakage protection switch; responds to this abnormal signal in milliseconds and performs double cut-off: firstly, the main power supply is cut off to ensure overall electrical safety, and the power supply of the monitoring circuit itself is cut off simultaneously; this power-off operation directly triggers the core action of the regulating component, accurately presses the valve to open in reverse. The system automatically closes the electric valve, shutting it off in a very short time. This design can precisely locate and physically isolate the leak point. By closing the upstream valve closest to the leak point, the coolant supply to the damaged pipe section is immediately cut off, effectively preventing the coolant from continuously leaking out. This fundamentally solves the drawback of traditional solutions that only cut off the power but cannot stop the liquid leak, greatly curbing the expansion of the leak range and avoiding the risk of secondary electrical short circuits, internal corrosion damage to equipment, environmental pollution, personal injury accidents caused by slippery ground, and potential fire hazards caused by continuous coolant seepage. It significantly improves the inherent safety and fault controllability of the system. (2) The device provides multi-level and coordinated safety protection that surpasses conventional leakage protection, significantly enhancing the reliability and safety of container energy storage systems under harsh operating conditions, and constructing three closely connected safety defenses: the first defense is a sensitive awareness layer based on the normal monitoring of conductive lines. The conductive wires are normally energized, enabling them to instantly detect coolant contact leakage caused by pipe ruptures in any part of the circuit, laying the foundation for rapid response. The second line of defense is the intelligent decision-making and execution layer of the leakage protection switch. It is not only a conventional leakage circuit breaker, but also simultaneously executes critical dual disconnection commands: the main power supply is disconnected to eliminate electrical hazards in the main circuit; the power supply to the monitoring circuit is disconnected, which directly triggers the critical valve closing action, with clear and efficient decision-making logic. The third line of defense is the physical isolation layer achieved by the regulating components. It uses the purely mechanical driving force generated by the spring release after the electromagnetic coil is de-energized to directly and reliably drive the valve mechanism to close, completely independent of any potentially unstable external power supply after a fault, ensuring accurate isolation action even in the most dangerous power outage situations. These three lines of defense, together with the basic insulation layer, constitute a safety protection system that is rapid in response, reliable in action, comprehensive in coverage, and has a low false alarm rate. It not only targets the danger of leakage, but also focuses on solving a series of derivative risks caused by liquid leakage, greatly improving the robustness and long-term operational safety of the energy storage device under complex environments or unexpected impacts. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the entire utility model; Figure 2 This is a three-dimensional structural diagram of the energy storage rack of this utility model; Figure 3 This is a schematic diagram of the distribution of the liquid cooling guide tubes of this utility model; Figure 4 This is a schematic diagram of the internal cross-sectional structure of the guide tube of this utility model; Figure 5 This is an enlarged schematic diagram of the adjustment component of this utility model.

[0013] In the diagram: 1. Container; 2. Residual current circuit breaker; 3. Energy storage rack; 4. Refrigeration conveying device; 5. Liquid-cooled battery box; 6. Liquid inlet pipe; 7. Liquid outlet pipe; 8. Liquid inlet connector; 9. Liquid outlet connector; 10. Electric valve; 11. Guide pipe; 12. Conductive wire; 13. Operating chamber; 14. Limiting post; 15. Electromagnetic coil; 16. Metal column; 17. Push rod; 18. Spring; 19. Fixed plate; 20. Valve reverse switch; 21. Push plate. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-5 The present invention provides a technical solution as follows: Example: In this embodiment, a containerized energy storage device with liquid cooling function includes a container 1. An energy storage rack 3 is installed inside the container 1. A liquid cooling system and several liquid-cooled battery boxes 5 are installed on the energy storage rack 3. The liquid cooling system includes a cooling delivery device 4, which is fixedly installed inside the container 1. The cooling delivery device 4 is connected to an inlet pipe 6 and a drain pipe 7. The inlet pipe 6 is used to deliver coolant to the liquid-cooled battery boxes 5, and the drain pipe 7 is used to recover coolant from the liquid-cooled battery boxes 5. Several guide pipes 11 are respectively connected through the inlet pipe 6 and the drain pipe 7. The guide pipe 11 on the liquid pipe 6 is provided with several liquid inlet connectors 8, and the guide pipe 11 on the drain pipe 7 is provided with several drain connectors 9; each liquid-cooled battery box 5 is provided with a pair of connection ports, which are respectively connected to one of the liquid inlet connectors 8 and one of the drain connectors 9; the liquid inlet connectors 8 and 9, the guide pipe 11, the liquid inlet pipe 6, and the drain pipe 7 are all connected to electric valves 10; on the inner wall of the liquid inlet connectors 8 and 9, the guide pipe 11, the liquid inlet pipe 6, and the drain pipe 7, on the fluid upstream side of the electric valve 10, an operating chamber 13 is provided, and an adjustment component is provided in the operating chamber 13.

[0016] The regulating assembly includes a leakage current protection switch 2, a conductive wire 12, an electromagnetic coil 15, a metal column 16, a limit column 14, a push rod 17, a spring 18, a fixed plate 19, a valve reverse switch 20, and a push plate 21. The conductive wire 12 is embedded in the inner walls of the inlet pipe 6, outlet pipe 7, guide pipe 11, inlet connector 8, and outlet connector 9. The conductive wires 12 are electrically connected to each other and to the leakage current protection switch 2, which is located on the inner wall of the container 1. The electromagnetic coil 15 is located within the operating cavity 13 and is connected to the conductive wire 12. The electromagnetic coil 15 has a fixed axial direction. The metal column 16 is slidably sleeved on the limiting column 14 fixed to the inner wall of the operating cavity 13 at one end away from the electric valve 10; the push rod 17 is connected to the end of the metal column 16 near the electric valve 10; the spring 18 is sleeved on the push rod 17; the fixed plate 19 is provided in the operating cavity 13, and the fixed plate 19 has a through hole through which the push rod 17 passes; the push plate 21 is provided at the end of the push rod 17 facing the electric valve 10; the electric valve 10 is electrically connected to the valve reverse switch 20, and the position of the push plate 21 corresponds to the valve reverse switch 20.

[0017] The inner walls of the inlet pipe 6, outlet pipe 7, guide pipe 11, inlet connector 8, and outlet connector 9 are all provided with an insulating layer between them and the conductive wire 12.

[0018] When the electromagnetic coil 15 is energized, the magnetic attraction force it generates on the metal column 16 is greater than the elastic force of the spring 18.

[0019] Coolant flows through the inlet pipe 6, outlet pipe 7, and guide pipe 11.

[0020] The liquid-cooled battery box 5 has a cavity for placing the battery.

[0021] One end of the spring 18 is fixedly connected to the fixed plate 19, and the other end of the spring 18 is connected to the bottom end of the metal column 16.

[0022] Working principle: In use, the refrigeration delivery device 4 is first activated to cool the coolant to the set temperature. The refrigeration delivery device 4 pumps the low-temperature coolant into the inlet pipe 6. The low-temperature coolant is then distributed through the inlet pipe 6 to various guide pipes 11, and then transported to the corresponding liquid-cooled battery box 5 through multiple inlet connectors 8 on the guide pipes 11. The coolant flows in the chambers inside the liquid-cooled battery box 5, directly or indirectly contacting the battery modules, absorbing the heat generated during battery charging and discharging, and its own temperature rises. The coolant, after absorbing heat and rising in temperature, flows out from the connection port of the liquid-cooled battery box 5, enters the guide pipe 11 on the drain pipe 7 through the corresponding drain connector 9, and finally collects in the drain pipe 7. The high-temperature coolant flows back to the refrigeration delivery device 4 through the drain pipe 7, is cooled down again, and completes one cycle. This cycle continues to ensure that the battery operates within a safe temperature range. Conductive wire 12 is normally energized: Conductive wire 12 forms a low-voltage monitoring circuit. Under normal operating conditions, a constant small current is supplied by the power supply device, keeping it in an energized monitoring state. Electromagnetic coil 15 is energized and engaged: Because conductive wire 12 is energized, electromagnetic coil 15 in operating chamber 13 is also energized. The magnetic attraction force generated by electromagnetic coil 15 is greater than the elastic force of spring 18, thus attracting metal column 16, causing it to overcome the elastic force of spring 18 and move away from electric valve 10. At this time, push rod 17 and push plate 21 retract together with metal column 16, moving away from valve reverse switch 20. Therefore, valve reverse switch 20 is not triggered, electric valve 10 remains open, and coolant flows normally. The insulation layer on the inner wall of the pipe ensures that even if the coolant in the pipe flows normally, it will not come into contact with the energized conductive wire 12, causing a short circuit or malfunction. When the pipes such as the guide pipe 11, inlet pipe 6, outlet pipe 7, inlet connector 8, or outlet connector 9 crack or break, the coolant inside will leak out. The leaking coolant comes into contact with the conductive wire 12 embedded in the inner wall of the damaged pipe. Since the coolant itself is conductive, this causes the conductive wire 12 to leak current. The leakage protection switch 2 monitors the status of the conductive wire 12 circuit in real time. Once a leakage current is detected, the leakage protection switch 2 immediately acts: first, it cuts off the main power supply of the entire energy storage device or related circuit to prevent electric shock and fire risks; at the same time, it cuts off the power supply to the monitoring circuit of the conductive wire 12. Since the power supply to the monitoring circuit is cut off by the leakage protection switch 2, the electromagnetic coil 15 in the operating chamber 13 is immediately de-energized. The magnetic attraction force generated by the electromagnetic coil 15 disappears instantly, making the elastic force of the previously compressed spring 18 the dominant force. The spring 18 pushes the metal column 16 towards the... The metal column 16 moves rapidly towards the electric valve 10; the metal column 16 drives the push rod 17 to move together towards the electric valve 10, causing the push rod 17 to pass through the fixed plate 19, and the push plate 21 at its end moves forward, pressing the valve reverse switch 20 installed on the electric valve 10; after the valve reverse switch 20 is triggered, it immediately changes the state of the electric valve 10, causing the electric valve 10 to close quickly; the closed electric valve 10, especially the valves on the inlet joint 8, drain joint 9, and upstream guide pipe 11 and inlet / drain pipe 6 / 7 near the leak point, immediately cuts off the coolant supply to the damaged pipe section and prevents coolant from continuing to seep out from the damaged area; this effectively isolates the leak point and prevents the continuous leakage of coolant from causing the electrical short circuit range to expand, equipment damage to worsen, environmental pollution or safety hazards; in the event of power failure, the valve automatically closes to ensure safety; After troubleshooting, manually reset the leakage protection switch 2, and the monitoring circuit is re-energized, i.e., the conductive wire 12 is energized; the electromagnetic coil 15 is re-energized, generating a magnetic force, which overcomes the elastic force of the spring 18 and pulls the metal column 16 back again, driving the push rod 17 and the push plate 21 away from the valve reverse switch 20; the valve reverse switch 20 is reset, the electric valve 10 is reopened, and the system resumes liquid cooling circulation.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A containerized energy storage device with liquid cooling function, comprising a container (1), characterized in that: The container (1) is equipped with an energy storage rack (3), on which a liquid cooling system and several liquid cooling battery boxes (5) are mounted. The liquid cooling system includes a cooling delivery device (4), which is fixedly installed inside the container (1). The cooling delivery device (4) is connected to an inlet pipe (6) and a drain pipe (7). The inlet pipe (6) is used to deliver coolant to the liquid cooling battery boxes (5), and the drain pipe (7) is used to recover coolant from the liquid cooling battery boxes (5). Several guide pipes (11) are respectively connected to the inlet pipe (6) and the drain pipe (7). Several inlet connectors are provided on the guide pipes (11) on the inlet pipe (6). (8) The guide pipe (11) on the drain pipe (7) is provided with several drain connectors (9); each of the liquid-cooled battery boxes (5) is provided with a pair of connection ports, which are respectively connected to one of the liquid inlet connectors (8) and one of the drain connectors (9); the liquid inlet connectors (8) and drain connectors (9), guide pipes (11), liquid inlet pipes (6) and drain pipes (7) are all connected to electric valves (10); on the inner wall of the liquid inlet connectors (8) and drain connectors (9), guide pipes (11), liquid inlet pipes (6) and drain pipes (7), on the fluid upstream side of the electric valves (10), an operating chamber (13) is provided, and an adjustment component is provided in the operating chamber (13).

2. A containerized energy storage device with liquid cooling function according to claim 1, characterized in that: The regulating assembly includes a leakage protection switch (2), a conductive wire (12), an electromagnetic coil (15), a metal column (16), a limit column (14), a push rod (17), a spring (18), a fixed plate (19), a valve reverse switch (20), and a push plate (21); the conductive wire (12) is embedded in the inner wall of the inlet pipe (6), the outlet pipe (7), the guide pipe (11), the inlet connector (8), and the outlet connector (9), and the conductive wire (12) is electrically connected to each other and connected to the leakage protection switch (2), which is located on the inner wall of the container (1); the electromagnetic coil (15) is provided in the operating cavity (13), and the electromagnetic coil (15) is connected to the conductive wire (12); the electromagnetic coil (15) is axially oriented in the direction of the electromagnetic coil (15). The metal column (16) is provided, and one end of the metal column (16) away from the electric valve (10) is slidably sleeved on the limiting column (14) fixed to the inner wall of the operating cavity (13); the end of the metal column (16) near the electric valve (10) is connected to the push rod (17); the spring (18) is sleeved on the push rod (17); the fixed plate (19) is provided in the operating cavity (13), and the fixed plate (19) has a through hole, through which the push rod (17) passes; the end of the push rod (17) facing the electric valve (10) is provided with the push plate (21); the electric valve (10) is electrically connected to the valve reverse switch (20), and the position of the push plate (21) corresponds to the valve reverse switch (20).

3. A containerized energy storage device with liquid cooling function according to claim 2, characterized in that: The inner walls of the inlet pipe (6), outlet pipe (7), guide pipe (11), inlet connector (8) and outlet connector (9) are all provided with an insulating layer between them and the conductive wire (12).

4. A containerized energy storage device with liquid cooling function according to claim 3, characterized in that: When the electromagnetic coil (15) is energized, the magnetic attraction force it generates on the metal column (16) is greater than the elastic force of the spring (18).

5. A containerized energy storage device with liquid cooling function according to claim 4, characterized in that: Coolant flows through the inlet pipe (6), outlet pipe (7), and guide pipe (11).

6. A containerized energy storage device with liquid cooling function according to claim 5, characterized in that: The liquid-cooled battery box (5) has a cavity for placing batteries.

7. A containerized energy storage device with liquid cooling function according to claim 6, characterized in that: One end of the spring (18) is fixedly connected to the fixed plate (19), and the other end of the spring (18) is connected to the bottom of the metal column (16).

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