High-altitude energy storage device

Abstract

The utility model relates to the technical field of energy storage devices, in particular to a high-altitude energy storage device which comprises a control box and a plurality of battery clusters, each battery cluster comprises a plurality of plug-in boxes, the control box comprises a vacuum pump, a nitrogen injection pump, a nitrogen cylinder and a controller, the vacuum pump is connected with the plug-in boxes and used for vacuumizing the plug-in boxes, and the nitrogen injection pump is connected with the controller. One end of the nitrogen injection pump is connected with the nitrogen cylinder, the other end of the nitrogen injection pump is connected with gas inlet pipes of the plug-in boxes and used for injecting nitrogen into the plug-in boxes, the plug-in boxes are provided with gas outlet pipes and sensors, the gas outlet pipes are connected with the nitrogen cylinder, valves are arranged on the gas inlet pipes and the gas outlet pipes, and the sensors are connected with the nitrogen cylinder. The sensor is used for monitoring the temperature of a battery cell and whether thermal runaway occurs or not, and the controller is used for controlling the nitrogen injection pump to start and stop according to a signal of the sensor. The plug-in box is suitable for high-altitude areas, the size of the plug-in box does not need to be increased, and the plug-in box can be directly cooled.

Description

Technical Field

[0001] This utility model relates to the field of energy storage device technology, specifically to a high-altitude energy storage device. Background Technology

[0002] Due to the special environmental conditions in high-altitude areas, such as thin air, low air pressure, and large temperature variations, higher requirements are placed on the performance and safety of battery energy storage devices. For example, the electrical clearance must take into account the altitude coefficient because the air pressure decreases, the insulating ability of the air decreases, and the withstand voltage under the same electrical clearance will decrease. Therefore, special electrical creepage distance must be designed. However, this will increase the size of the container, increase the cost, reduce the energy density, and require derating, which reduces the performance of the container system and cannot meet the requirements of the application scenario.

[0003] Chinese utility model patent CN221486591U discloses a protection device for a prefabricated cabin-type energy storage power station based on insulation plates and liquid nitrogen. This device separates adjacent battery clusters using insulation plates and assigns a liquid nitrogen injection pipe to each cluster. When one battery cluster experiences thermal runaway, it will not affect other clusters. Furthermore, liquid nitrogen is injected into the area of ​​the thermal runaway cluster to absorb a large amount of heat and cool it down. However, this protection device cannot precisely deliver liquid nitrogen to a specific compartment within the battery cluster and is not suitable for the electrical creepage distance requirements in high-altitude areas. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a high-altitude energy storage device that is suitable for high-altitude areas, does not require increasing the size of the charging box, and can directly dissipate heat from the charging box.

[0005] To address the aforementioned technical problems, this utility model provides a high-altitude energy storage device, comprising a control box and multiple battery clusters. Each battery cluster includes multiple battery compartments. The control box includes a vacuum pump, a nitrogen injection pump, a nitrogen cylinder, and a controller. The vacuum pump is connected to the multiple battery compartments to evacuate the compartments. One end of the nitrogen injection pump is connected to the nitrogen cylinder, and the other end is connected to the air inlet pipe of each battery compartment to inject nitrogen into the compartments. Each battery compartment is equipped with an air outlet pipe and a sensor. The air outlet pipe is connected to the nitrogen cylinder. Valves are installed on both the air inlet pipe and the air outlet pipe. The sensor is used to monitor the battery cell temperature and whether thermal runaway has occurred. The controller is used to control the start and stop of the nitrogen injection pump based on the sensor signals.

[0006] In some embodiments, multiple plug boxes in each battery cluster are connected in parallel via pipes, and valves are provided on the pipes connecting the battery clusters to the control box.

[0007] Furthermore, the battery cluster includes a cluster controller, which includes a circulation pump for driving nitrogen flow between the cells.

[0008] In some embodiments, an intake solenoid valve and an outlet solenoid valve are respectively provided on the intake pipe and the outlet pipe, and the cluster controller is connected to the intake solenoid valve and the outlet solenoid valve to control the opening and closing of the intake solenoid valve and the outlet solenoid valve.

[0009] Furthermore, the nitrogen cylinder is connected to each of the battery clusters via an inlet primary pipeline and an outlet primary pipeline, and multiple battery clusters are connected in parallel. A main solenoid valve is provided on both the inlet primary pipeline and the outlet primary pipeline. The controller is used to control the opening and closing of the main solenoid valve. The nitrogen injection pump is located on the inlet primary pipeline, and the vacuum pump is connected to the outlet primary pipeline.

[0010] In some embodiments, a temperature sensor is provided inside the insertion box, and the temperature sensor is connected to the cluster controller and the controller.

[0011] Furthermore, the nitrogen cylinder is connected to a heat exchanger, which is used to ensure that the nitrogen in the nitrogen cylinder is always at a low temperature.

[0012] In some embodiments, a housing is included, with a control box disposed at one end of the housing, and a plurality of battery clusters arranged vertically and parallel to each other within the housing.

[0013] Furthermore, the primary intake pipe and the primary exhaust pipe are arranged on top of the battery cluster. The intake pipe is connected to the primary intake pipe through a secondary intake pipe, which is arranged vertically. The exhaust pipe is connected to the primary exhaust pipe through a secondary exhaust pipe, which is also arranged vertically.

[0014] Furthermore, the cluster controller is located near the bottom of the housing.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model, by setting up a vacuum pump and a nitrogen injection pump, can evacuate the socket and then inject nitrogen gas, so that the socket is filled with high-pressure nitrogen gas, ensuring electrical creepage distance, reducing the size of the socket, saving costs, and there is no flammable gas in the socket, and the full nitrogen gas is beneficial to safety. In addition, the socket is connected to the nitrogen cylinder through the gas outlet pipe, so that the nitrogen gas in the socket can be circulated, which can perform conventional heat dissipation of the battery cell and remove high-temperature nitrogen gas in the event of battery thermal runaway. Compared with the prior art, there is no need to use partitions to separate the sockets or the battery clusters composed of multiple sockets.

[0017] 2. This utility model forms a cluster-level control system by connecting multiple boxes in parallel in each battery cluster. The nitrogen gas in the boxes in each battery cluster can circulate, ensuring the consistency of nitrogen temperature, density and pressure in the boxes within the cluster, thereby improving the consistency of the cells within the cluster and extending the cell life.

[0018] 3. By setting up a circulation pump, this utility model forces the nitrogen gas in the insertion box to circulate in multiple insertion boxes, thereby further improving the consistency of nitrogen gas temperature, density, and pressure in the insertion boxes within the cluster.

[0019] 4. This utility model can realize the airtightness detection of the plug box and the isolation after thermal runaway of a plug box by means of the inlet solenoid valve and the outlet solenoid valve. In addition, the plug box can be disassembled and repaired by closing the inlet solenoid valve and the outlet solenoid valve of a plug box without affecting the normal operation of other plug boxes.

[0020] 5. The nitrogen cylinder of this utility model is connected to each of the battery clusters through an inlet pipeline and an outlet pipeline. When it is necessary to cool down a certain box or battery cluster, the main solenoid valve, the inlet solenoid valve and the outlet solenoid valve can be opened to discharge the high-temperature nitrogen in the box into the nitrogen cylinder for cooling. The low-temperature nitrogen enters the box, and the cycle continues to ensure temperature control, improve the safety of battery cell operation and extend battery cell life.

[0021] 6. The temperature sensor of this utility model is connected to both the cluster controller and the controller. When a certain plug box experiences thermal runaway, the cluster controller receives a signal from the temperature sensor and immediately closes the inlet and outlet solenoid valves of the other plug boxes. The controller can open the main control valve to discharge the high-temperature nitrogen gas in the plug box into the nitrogen cylinder for cooling, while the low-temperature nitrogen gas enters the thermally runaway plug box. Attached Figure Description

[0022] Figure 1 This is the front view of the present invention;

[0023] Figure 2 This is a schematic diagram of the battery cluster structure of this utility model;

[0024] Figure 3 This is a top view of the present invention.

[0025] Attached reference numerals: 1-Box body; 2-Control box; 3-Inlet primary pipeline; 4-Outlet primary pipeline; 5-Inlet secondary pipeline; 6-Outlet secondary pipeline; 7-Battery cluster; 8-Plug box; 9-Cluster controller; 10-Inlet solenoid valve; 11-Outlet solenoid valve; 12-Inlet tertiary pipeline; 13-Outlet tertiary pipeline; 14-Display control panel. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0027] like Figure 1 As shown, this utility model provides a high-altitude energy storage device, including a housing 1. A control box 2 and multiple battery clusters 7 are installed inside the housing 1. The control box 2 is fixedly installed near the left end of the housing 1. The multiple battery clusters 7 are arranged vertically and parallel. Each battery cluster 7 includes multiple insertion boxes 8, which are evenly arranged along the height direction of the housing 1. The control box 2 includes a vacuum pump, a nitrogen injection pump, a nitrogen cylinder, and a controller. The vacuum pump is connected to the multiple insertion boxes 8 and is used to evacuate the insertion boxes 8. One end of the nitrogen injection pump is connected to the nitrogen cylinder, and the other end of the nitrogen injection pump is connected to the air inlet pipe (i.e., the three-stage air inlet pipeline 12) of the multiple insertion boxes 8 for injecting nitrogen into the insertion boxes 8. Each insertion box 8 is equipped with an air outlet pipe (i.e., the three-stage air outlet pipeline 13) and a sensor. The air outlet pipe is connected to the nitrogen cylinder. Valves are installed on both the air inlet pipe and the air outlet pipe. The sensor is used to monitor the cell temperature and whether thermal runaway has occurred. The controller is used to control the start and stop of the nitrogen injection pump according to the signal from the sensor. Figure 1 The vacuum pump, nitrogen injection pump, nitrogen cylinder, and controller are not shown in the diagram; they are all part of the control box 2 and are all existing technologies.

[0028] It is understandable that a vacuum pump can be used to evacuate the inside of each socket 8, and then a nitrogen injection pump can be used to inject sufficient nitrogen into the socket 8 to achieve a certain pressure, ensuring electrical creepage distance. This allows for a reduction in the size of the socket 8, saving costs. Furthermore, the socket 8 contains only nitrogen and no flammable gas. The full nitrogen content is beneficial for safety, preventing fires caused by thermal runaway of the battery cells. In addition, the socket 8 is connected to a nitrogen cylinder through an outlet pipe, allowing the nitrogen inside the socket 8 to circulate. This facilitates regular heat dissipation of the battery cells and allows high-temperature nitrogen to enter the nitrogen cylinder for cooling in the event of battery thermal runaway. Compared to existing technologies, it is not necessary to separate the socket 8 or the battery cluster 7 composed of multiple socket 8s using partitions.

[0029] In some embodiments, multiple plug boxes 8 in each battery cluster 7 are connected in parallel via pipes, and valves are installed on the pipes connecting the battery cluster 7 and the control box 2.

[0030] like Figure 2 As shown, two adjacent insertion boxes 8 are connected in parallel via an intake secondary pipe 5 and an exhaust secondary pipe 6. Valves are installed on the pipes connecting the intake secondary pipe 5 and the exhaust secondary pipe 6 to the control box 2, thus forming a cluster-level control system. When the valve is closed, the nitrogen gas in the insertion boxes 8 of each battery cluster 7 can circulate, ensuring the consistency of nitrogen temperature, density, and pressure in the insertion boxes 8 within the cluster, thereby improving the consistency of the cells within the cluster and extending the cell life.

[0031] Furthermore, the battery cluster 7 includes a cluster controller 9, which includes a circulation pump for driving the flow of nitrogen between the plug boxes 8.

[0032] like Figure 2 As shown, the cluster controller 9 is located near the bottom of the housing 1. The cluster controller 9 includes a circulation pump, which can be installed on the secondary inlet pipe 5 or the secondary outlet pipe 6. It can actively control the circulation of nitrogen in multiple insert boxes 8, further improving the consistency of nitrogen temperature, density and pressure in the insert boxes 8 within the cluster.

[0033] In some embodiments, an intake solenoid valve 10 and an exhaust solenoid valve 11 are respectively provided on the intake pipe and the exhaust pipe. The cluster controller 9 is connected to the intake solenoid valve 10 and the exhaust solenoid valve 11 and is used to control the opening and closing of the intake solenoid valve 10 and the exhaust solenoid valve 11.

[0034] Understandably, the cluster controller 9 can individually control the inlet solenoid valve 10 and outlet solenoid valve 11 of any individual plug-in box 8, enabling airtightness detection of the plug-in box 8, isolation after thermal runaway of the plug-in box 8, and disassembly and maintenance of a specific plug-in box 8. Specifically:

[0035] Air tightness test of plug box 8: After vacuuming the plug box 8, high-pressure nitrogen is injected into all plug boxes 8 of a battery cluster 7. At this time, the gas pressure in the secondary inlet pipe 5 or the secondary outlet pipe 6 can be monitored. If the gas pressure in the secondary inlet pipe 5 or the secondary outlet pipe 6 drops after a period of time, it indicates that there is a leak. At this time, the inlet solenoid valve 10 and the outlet solenoid valve 11 of the plug box 8 of the battery cluster 7 can be closed one by one. After closing the inlet solenoid valve 10 and the outlet solenoid valve 11 of one plug box 8, the monitoring is carried out for a period of time. When the gas pressure does not change after closing the inlet solenoid valve 10 and the outlet solenoid valve 11 of a certain plug box 8, it indicates that there is a leak in the plug box 8.

[0036] Isolation after thermal runaway of plug box 8: When the sensor in a plug box 8 detects that thermal runaway has occurred in plug box 8, the corresponding intake solenoid valve 10 and exhaust solenoid valve 11 of plug box 8 can be closed to prevent the transmission of thermal runaway between plug boxes 8 and improve safety.

[0037] Disassembly and maintenance of a specific plug box 8: When a specific plug box 8 needs maintenance, the corresponding intake solenoid valve 10 and exhaust solenoid valve 11 of the plug box 8 can be closed, and the plug box 8 can be disassembled for maintenance.

[0038] Furthermore, such as Figure 1 As shown, the nitrogen cylinder is connected to each battery cluster 7 via an inlet primary pipe 3 and an outlet primary pipe 4. Multiple battery clusters 7 are connected in parallel. A main solenoid valve is installed on both the inlet primary pipe 3 and the outlet primary pipe 4. Figure 1 The main solenoid valve is not shown in the diagram. The controller is used to control the opening and closing of the main solenoid valve. The nitrogen injection pump is installed on the first-stage inlet pipeline 3, and the vacuum pump is connected to the first-stage outlet pipeline 4.

[0039] Understandably, when it is necessary to cool down a certain plug box 8 or battery cluster 7, the main solenoid valve, the inlet solenoid valve 10 and the outlet solenoid valve 11 can be opened to discharge the high-temperature nitrogen in the plug box 8 into the nitrogen cylinder for cooling, and the low-temperature nitrogen enters the plug box 8. This cycle is repeated to ensure temperature control, improve the safety of battery cell operation and extend battery cell life.

[0040] In some embodiments, a temperature sensor is provided inside the insertion box 8, and the temperature sensor is connected to the cluster controller 9 and the controller.

[0041] Understandably, the temperature sensor is connected to both the cluster controller 9 and the controller. When a certain plug box 8 experiences thermal runaway, the cluster controller 9 receives a signal from the temperature sensor. In addition to closing the inlet solenoid valve 10 and outlet solenoid valve 11 of the thermally runaway plug box 8, it can also close the inlet solenoid valve 10 and outlet solenoid valve 11 of other plug boxes 8. The main controller can open the main control valve to discharge the high-temperature nitrogen gas in the plug box 8 into the nitrogen cylinder for cooling, and the low-temperature nitrogen gas enters the thermally runaway plug box 8.

[0042] Furthermore, the nitrogen cylinder is connected to a heat exchanger, which is used to ensure that the nitrogen in the nitrogen cylinder is always kept at a low temperature.

[0043] Furthermore, such as Figure 1 , 3 As shown, the primary intake pipe 3 and the primary exhaust pipe 4 are arranged on the top of the battery cluster 7. The tertiary intake pipe 12 is connected to the primary intake pipe 3 through the secondary intake pipe 5, which is arranged vertically. The tertiary exhaust pipe 13 is connected to the primary exhaust pipe 4 through the secondary exhaust pipe 6, which is arranged vertically.

[0044] Furthermore, such as Figure 1 As shown, the main control box 2 also includes a display screen 14, which can display information such as air pressure and temperature of each plug box 8.

[0045] This invention is applicable to high-altitude areas and can achieve precise cluster-level control with high safety.

[0046] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A high-altitude energy storage device, characterized in that: The device includes a control box (2) and multiple battery clusters (7). Each battery cluster (7) includes multiple inserts (8). The control box (2) includes a vacuum pump, a nitrogen injection pump, a nitrogen cylinder, and a controller. The vacuum pump is connected to the multiple inserts (8) and is used to evacuate the inserts (8). One end of the nitrogen injection pump is connected to the nitrogen cylinder, and the other end of the nitrogen injection pump is connected to the air inlet pipe of the multiple inserts (8) for injecting nitrogen into the inserts (8). Each insert (8) is equipped with an air outlet pipe and a sensor. The air outlet pipe is connected to the nitrogen cylinder. Valves are provided on both the air inlet pipe and the air outlet pipe. The sensor is used to monitor the cell temperature and whether thermal runaway has occurred. The controller is used to control the start and stop of the nitrogen injection pump according to the signal from the sensor.

2. The high-altitude energy storage device according to claim 1, characterized in that: Multiple plug boxes (8) in each battery cluster (7) are connected in parallel via pipes, and valves are installed on the pipes connecting the battery cluster (7) to the control box (2).

3. The high-altitude energy storage device according to claim 2, characterized in that: The battery cluster (7) includes a cluster controller (9), which includes a circulation pump for driving nitrogen flow between the plug boxes (8).

4. The high-altitude energy storage device according to claim 3, characterized in that: An intake solenoid valve (10) and an outlet solenoid valve (11) are respectively installed on the intake pipe and the outlet pipe. The cluster controller (9) is connected to the intake solenoid valve (10) and the outlet solenoid valve (11) and is used to control the opening and closing of the intake solenoid valve (10) and the outlet solenoid valve (11).

5. The high-altitude energy storage device according to claim 4, characterized in that: The nitrogen cylinder is connected to each of the battery clusters (7) through an inlet primary pipeline (3) and an outlet primary pipeline (4). Multiple battery clusters (7) are connected in parallel. A main solenoid valve is provided on both the inlet primary pipeline (3) and the outlet primary pipeline (4). The controller is used to control the opening and closing of the main solenoid valve. The nitrogen injection pump is provided on the inlet primary pipeline (3). The vacuum pump is connected to the outlet primary pipeline (4).

6. The high-altitude energy storage device according to claim 5, characterized in that: A temperature sensor is installed inside the insertion box (8), and the temperature sensor is connected to the cluster controller (9) and the controller.

7. The high-altitude energy storage device according to claim 5, characterized in that: The nitrogen cylinder is connected to a heat exchanger, which is used to ensure that the nitrogen in the nitrogen cylinder is always kept at a low temperature.

8. The high-altitude energy storage device according to claim 5, characterized in that: Includes a housing (1), with a control box (2) arranged at one end inside the housing (1), and multiple battery clusters (7) arranged vertically and parallel inside the housing (1).

9. The high-altitude energy storage device according to claim 8, characterized in that: The primary intake pipe (3) and the primary exhaust pipe (4) are arranged on the top of the battery cluster (7). The intake pipe is connected to the primary intake pipe (3) through the secondary intake pipe (5), which is arranged vertically. The exhaust pipe is connected to the primary exhaust pipe (4) through the secondary exhaust pipe (6), which is arranged vertically.

10. The high-altitude energy storage device according to claim 8, characterized in that: The cluster controller (9) is located near the bottom of the housing (1).

Images