Lithium battery fire extinguishing system

Abstract

The invention discloses a lithium battery fire extinguishing system, and belongs to the technical field of lithium battery fire extinguishing, the lithium battery fire extinguishing system comprises an energy storage cabin, the energy storage cabin is used for arranging a plurality of battery clusters, each battery cluster comprises a plurality of stacked battery modules, a fire water monitor is installed in the energy storage cabin, and the fire water monitor sprays a fire extinguishing medium to any battery cluster; a water collecting tank is arranged at the bottom of the battery cluster and is used for collecting the fire extinguishing medium flowing down from a plurality of battery modules of the battery cluster; a liquid supply assembly is arranged in the water collecting tank, filling openings are formed in the outer box body of the battery module, and the liquid supply assembly supplies the fire extinguishing medium in the water collecting tank into any filling opening through a pipeline assembly. The device has battery cluster external fire extinguishing and battery module internal fire extinguishing medium filling functions, realizes cyclic utilization from external fire suppression to internal cooling of the battery module after the fire extinguishing medium is sprayed, and improves economical efficiency and reliability; the system is low in complexity and easy to overhaul and maintain; the modification cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery fire extinguishing, and particularly to a lithium battery fire extinguishing system. Background Art

[0002] With the advancement of China's energy structure transformation, electrochemical energy storage technology has become an important pillar supporting the new power system. Among them, prefabricated cabin type lithium battery energy storage power stations have become the mainstream form due to their advantages such as modularization and rapid deployment. However, their fire safety problems are particularly prominent. Most of the existing technical paths adopt whole-cabin-level fire-fighting facilities, such as retaining dense fire-fighting pipelines or pre-setting fire extinguishing medium containers in the cabin, resulting in high initial installation costs and difficulty in adapting to the transformation requirements of the already put-into-production energy storage cabins. In addition, although the scheme of embedding fire extinguishing devices in battery modules can improve the response speed, the later maintenance and overhaul costs of such fire extinguishing devices are high.

[0003] Therefore, a lithium battery fire extinguishing system is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a lithium battery fire extinguishing system, aiming to solve or improve at least one of the above technical problems.

[0005] To achieve the above purpose, the present invention provides the following solution: The present invention provides a lithium battery fire extinguishing system, including an energy storage cabin for setting a plurality of battery clusters, each battery cluster including a plurality of battery modules stacked on top of each other. A fire water monitor is installed in the energy storage cabin, and the fire water monitor sprays a fire extinguishing medium on any one of the battery clusters;

[0006] A water collecting tank is arranged at the bottom of the battery cluster for collecting the fire extinguishing medium flowing down from the plurality of battery modules of the battery cluster; a liquid supply assembly is arranged in the water collecting tank, and a perfusion port is opened on the outer box body of the battery module. The liquid supply assembly supplies the fire extinguishing medium in the water collecting tank into any one of the perfusion ports through a pipeline assembly.

[0007] Preferably, a perfusion pipe is fixedly connected to the perfusion port, and a splash plate is rotatably connected to the end of the perfusion pipe facing the inside of the battery module. A plurality of notches are opened on the side of the splash plate, and a plurality of inclined blades are fixedly connected to the notches.

[0008] Preferably, a plurality of groups of hollow-outs are opened on the splash plate, and the hollow-outs are located between adjacent two notches. The hollow-outs include a plurality of water passing openings, one end of each water passing opening is close to the center of the splash plate, and the other end does not penetrate the edge of the splash plate.

[0009] Preferably, a rotating shaft is fixedly connected to the splash plate, and a bracket is rotatably connected to the rotating shaft. The bracket is fixedly connected to the inner wall of the perfusion pipe.

[0010] Preferably, the pipeline assembly includes a fire extinguishing pipeline arranged on one side of the battery cluster. A plurality of the perfusion pipes are fixedly connected and communicated with the fire extinguishing pipeline. An electromagnetic valve is fixedly connected to the perfusion pipe. The liquid supply assembly is connected to the fire extinguishing pipeline.

[0011] Preferably, the liquid supply assembly includes a water pump arranged in the water collecting tank. The liquid outlet end of the water pump is fixedly connected and communicated with the fire extinguishing pipeline. A water level sensor is fixedly connected in the water collecting tank.

[0012] Preferably, two diversion protrusions are fixedly connected to the side wall of the outer box body of the battery module. The two diversion protrusions are arranged in a shape similar to an inverted V. The tops of the two diversion protrusions are fixedly connected. The diversion protrusions are located below the perfusion port.

[0013] Preferably, the inner shape of the water collecting tank is an inverted cone shape. One side of the water collecting tank is detachably connected with an opening and closing outer edge.

[0014] Preferably, a high-temperature resistant rubber ring is arranged on the side wall of the opening and closing outer edge in contact with the water collecting tank.

[0015] Preferably, an infrared flame detection system is arranged in the energy storage cabin. The fire fighting water cannon is electrically connected with the infrared flame detection system.

[0016] The present invention discloses the following technical effects: When a fire occurs in a certain battery module, the fire fighting water cannon aims at this battery module and sprays a fire extinguishing medium to extinguish the fire. The fire extinguishing medium is sprayed onto the battery module to achieve external fire suppression and then flows downward along the battery module into the lower water collecting tank. The liquid supply assembly supplies the fire extinguishing medium in the water collecting tank into the perfusion port of the battery module on fire through the pipeline assembly to extinguish the fire inside the battery module. This application has the functions of external fire extinguishing for the battery cluster and internal fire extinguishing medium perfusion for the battery module, realizes the recycling of the fire extinguishing medium from external fire suppression to internal cooling after the fire extinguishing medium is sprayed, improves the economy and reliability. And there is no need to arrange complex fire fighting pipe networks throughout the cabin, no need to sacrifice the energy storage energy density to store the fire extinguishing medium inside the battery module. The system complexity is low, and it is easy to overhaul and maintain; the modification cost is low, and it is convenient to be modified into a prefabricated cabin type energy storage power station that has been built and put into production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0018] Figure 1 is a schematic structural diagram of the present invention installed in the energy storage cabin;

[0019] Figure 2 is a top view of the present invention installed in the energy storage cabin;

[0020] Figure 3 It is a schematic structural diagram of the battery cluster and the water collecting tank in the present invention;

[0021] Figure 4 It is a schematic structural diagram of the battery cluster in the present invention;

[0022] Figure 5 It is an internal schematic diagram of the battery module in the present invention;

[0023] Figure 6 It is an isometric view of the water splashing plate in the present invention;

[0024] Figure 7 It is a front view of the water splashing plate in the present invention;

[0025] Figure 8 It is a schematic structural diagram of the water collecting tank in the present invention;

[0026] Figure 9 It is an exploded view of Embodiment 2 in the present invention;

[0027] Figure 10 It is a schematic structural diagram of Embodiment 2 in the present invention;

[0028] Figure 11 It is a schematic structural diagram when the second sliding pipe extends out in Embodiment 3 of the present invention;

[0029] Figure 12 It is a schematic structural diagram of Embodiment 3 in the present invention.

[0030] In the figure: 100, water collecting tank; 101, water pump; 102, water level sensor; 103, opening and closing outer edge;

[0031] 200, battery module; 201, fire extinguishing pipeline; 202, solenoid valve; 203, diversion protrusion; 204, support column; 205, water splashing plate; 2051, notch; 2052, inclined blade; 2053, hollow out;

[0032] 300, fire fighting water cannon;

[0033] 400, energy storage cabin;

[0034] 500, first sliding pipe; 501, first water outlet hole;

[0035] 600, second sliding pipe; 601, second water outlet hole. Detailed implementation manners

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Embodiment 1

[0039] Referring to Figures 1-8 , the present invention provides a lithium battery fire extinguishing system, including an energy storage compartment 400 for arranging a plurality of battery clusters. Each battery cluster includes a plurality of battery modules 200 stacked on top of each other. A fire fighting water cannon 300 is installed in the energy storage compartment 400, and the fire fighting water cannon 300 sprays a fire extinguishing medium on any battery cluster.

[0040] A water collecting tank 100 is arranged at the bottom of the battery cluster for collecting the fire extinguishing medium flowing down from the plurality of battery modules 200 of the battery cluster. A liquid supply assembly is arranged in the water collecting tank 100, and a filling port is opened on the outer box body of the battery module 200. The liquid supply assembly supplies the fire extinguishing medium in the water collecting tank 100 into any filling port through a pipeline assembly.

[0041] In this embodiment, the fire fighting water cannon 300 is installed at the center of the top of the energy storage compartment 400, and a plurality of battery clusters are arranged around the energy storage compartment 400. The fire fighting water cannon 300 has a 360° left - right and 180° up - down rotation function, so that the range of the water cannon can cover any battery cluster in the energy storage compartment, realizing external fire extinguishing at any position.

[0042] When a fire occurs in a certain battery module 200, the fire fighting water cannon 300 aims at this battery module 200 and sprays a fire extinguishing medium to extinguish the fire. The fire extinguishing medium is sprayed onto the battery module 200 to achieve external fire suppression and then flows down along the battery module 200 into the lower water collecting tank 100. The liquid supply assembly supplies the fire extinguishing medium in the water collecting tank 100 into the filling port of the burning battery module 200 to extinguish the fire inside the battery module 200. This application has the functions of external fire extinguishing of the battery cluster and internal fire extinguishing medium perfusion of the battery module, realizing the recycling of the fire extinguishing medium from external fire suppression to internal cooling after the fire extinguishing medium is discharged, improving economy and reliability. And there is no need to arrange complex fire fighting pipe networks throughout the cabin, no need to sacrifice the energy storage density to store the fire extinguishing medium inside the battery module. The system complexity is low, easy to repair and maintain; the modification cost is low, and it is convenient to be modified into a prefabricated cabin - type energy storage power station that has been built and put into production.

[0043] In some alternative embodiments, a perfusion tube is fixedly connected to the perfusion port. The end of the perfusion tube facing the inside of the battery module 200 is rotatably connected to a splash plate 205. A plurality of notches 2051 are formed on the side of the splash plate 205, and a plurality of inclined blades 2052 are fixedly connected at the notches 2051.

[0044] In some alternative embodiments, a plurality of sets of hollow-outs 2053 are formed on the splash plate 205. The hollow-outs 2053 are located between adjacent notches 2051. The hollow-outs 2053 include a plurality of water passing openings. One end of each water passing opening is close to the center of the splash plate 205, and the other end does not penetrate the edge of the splash plate 205.

[0045] When the fire extinguishing medium is sprayed onto the port of the perfusion tube, it impacts the inclined blades 2052, thereby driving the inclined blades 2052 to rotate, causing the splash plate 205 to rotate. Therefore, when the fire extinguishing medium sprays out from the notches 2051, it is driven by the rotating inclined blades 2052 to disperse around, preventing the fire extinguishing medium from accumulating near the middle of the splash plate 205. At the same time, part of the fire extinguishing medium passes through the hollow-outs 2053 in the middle and is sprayed onto the middle position, improving the dispersion effect of the fire extinguishing medium. That is to say, the splash plate 205 disperses and sprays the fire extinguishing medium into the inside of the battery module 200 through its own rotation, splashing and internal hollow-outs, avoiding the accumulation of the fire extinguishing medium in one place and thus enhancing the cooling efficiency.

[0046] In some alternative embodiments, a rotating shaft is fixedly connected to the splash plate 205. A bracket is rotatably connected to the rotating shaft, and the bracket is fixedly connected to the inner wall of the perfusion tube.

[0047] In some alternative embodiments, the pipeline assembly includes a fire extinguishing pipeline 201 arranged on one side of the battery cluster. A plurality of perfusion tubes are fixedly connected to and communicate with the fire extinguishing pipeline 201. A solenoid valve 202 is fixedly connected to the perfusion tube, and the liquid supply assembly is connected to the fire extinguishing pipeline 201.

[0048] In some alternative embodiments, the liquid supply assembly includes a water pump 101 arranged in the water collection tank 100. The liquid outlet end of the water pump 101 is fixedly connected to and communicates with the fire extinguishing pipeline 201, and a water level sensor 102 is fixedly connected in the water collection tank 100.

[0049] After the battery module catches fire, the solenoid valve 202 at the corresponding position opens the perfusion tube. The water level sensor 102 monitors the water level height in the water collection tank 100. When the threshold is reached, the water pump 101 is turned on, pumping the fire extinguishing medium in the water collection tank 100 into the fire extinguishing pipeline 201 and then spraying it into the inside of the battery module 200 through the perfusion tube.

[0050] In some alternative embodiments, two diversion protrusions 203 are fixedly connected to the side wall of the outer box of the battery module 200. The two diversion protrusions 203 are arranged in a shape similar to an inverted V. The tops of the two diversion protrusions 203 are fixedly connected, and the diversion protrusions 203 are located below the perfusion port.

[0051] A support column 204 is fixedly connected to the bottom of the lowermost battery module 200. The support column 204 supports in the water collecting tank 100. The diversion protrusion 203 facilitates the fire extinguishing medium sprayed on the outer box body of the battery module 200 to flow downward and flow into the water collecting tank 100 for collection.

[0052] In some alternative embodiments, the inner shape of the water collecting tank 100 is an inverted cone shape, and a detachable opening and closing outer edge 103 is connected to one side of the water collecting tank 100. The opening and closing outer edge 103 can be opened outward for easy maintenance.

[0053] In some alternative embodiments, a high-temperature resistant rubber ring is provided on the side wall where the opening and closing outer edge 103 contacts the water collecting tank 100, so as to ensure sealing and no water leakage.

[0054] In some alternative embodiments, an infrared flame detection system is provided in the energy storage cabin, and the fire fighting water cannon 300 is electrically connected to the infrared flame detection system.

[0055] In this embodiment, a battery management system is also provided. When a certain battery module 200 has a thermal runaway, the battery management system identifies it. It can also monitor the open fire through the infrared flame detection system. After the infrared flame detection system detects the open fire, the fire fighting water cannon 300 is directly driven, or after the battery management system identifies the thermal runaway situation, the battery management system transmits the situation to the control system. The control system identifies the position and controls the fire fighting water cannon 300 to start, and controls the solenoid valve 202 at the corresponding position to open;

[0056] The fire fighting water cannon 300 rotates and aims at the disaster battery cluster to start extinguishing. After the fire extinguishing medium acts on the outside of the battery module 200, it flows into the water collecting tank 100 along the diversion protrusion 203. When the total amount of the fire extinguishing medium in the water collecting tank 100 reaches the threshold, the water pump starts to send the fire extinguishing medium into the interior of the disaster battery module 200 through the fire extinguishing pipeline 201, and the fire extinguishing medium is dispersed and sprayed through the splash plate 205 of the filling port to achieve internal cooling.

[0057] Embodiment 2

[0058] Referring to Figures 9-10 , the difference from Embodiment 1 is that the rotating shaft on the splash plate 205 is hollow, a first sliding tube 500 is slidably connected inside the rotating shaft, an avoidance hole is opened in the middle of the splash plate 205, and the first sliding tube 500 is slidably connected with the avoidance hole; one end of the first sliding tube 500 facing the inside of the battery module 200 is sealed, and the other end is open. A plurality of columns of first water outlet holes 501 are opened on the side wall of the first sliding tube 500; an anti-disengagement block is fixedly connected to the outer wall of the first sliding tube 500, an anti-disengagement groove is opened on the inner wall of the rotating shaft, and the anti-disengagement block is slidably connected with the anti-disengagement groove.

[0059] Under normal circumstances, the first sliding pipe 500 retracts into the rotating shaft. When the fire extinguishing medium is supplied into the perfusion pipe, the impact force of the fire extinguishing medium drives the splash plate 205 to rotate, and at the same time, pushes the first sliding pipe 500 to slide forward, so that the first sliding pipe 500 slides out of the rotating shaft and extends towards the inside of the battery module 200, enabling the fire extinguishing medium to be ejected from the first water outlet hole 501 and the splash plate 205, thereby improving the spraying uniformity of the fire extinguishing medium; the setting of the anti - detachment block and the anti - detachment groove prevents the first sliding pipe 500 from detaching from the rotating shaft.

[0060] Embodiment 3

[0061] Refer to Figures 11-12 , the difference from Embodiment 1 is that a second sliding pipe 600 is slidably connected to one end of the perfusion pipe facing the inside of the battery module 200, and multiple rows of second water outlet holes 601 are provided on the side wall of the second sliding pipe 600; a rotating shaft is fixedly connected to the splash plate 205, a bracket is rotatably connected to the rotating shaft, and the bracket is fixedly connected to the inner wall of the second sliding pipe 600; an anti - detachment block is fixedly connected to the outer wall of the second sliding pipe 600, an anti - detachment groove is provided on the inner wall of the perfusion pipe, and the anti - detachment block is slidably connected to the anti - detachment groove.

[0062] Under normal circumstances, the second sliding pipe 600 retracts into the perfusion pipe. When the fire extinguishing medium is supplied into the perfusion pipe, the impact force of the fire extinguishing medium drives the second sliding pipe 600 to slide forward, the second sliding pipe 600 extends towards the inside of the battery module 200, and at the same time, the fire extinguishing medium drives the splash plate 205 to rotate, enabling the fire extinguishing medium to be ejected through the second water outlet holes 601 and the splash plate 205, improving the spraying uniformity.

[0063] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0064] The above - described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A lithium battery fire extinguishing system, characterized in that: The energy storage compartment (400) comprises a plurality of battery clusters, wherein the battery clusters comprise a plurality of stacked battery modules (200), and a firefighting water monitor (300) is installed in the energy storage compartment (400), wherein the firefighting water monitor (300) sprays a fire extinguishing medium to any of the battery clusters; A water collecting trough (100) is provided at the bottom of the battery cluster, and the water collecting trough (100) is used to collect the fire extinguishing medium flowing down from the multiple battery modules (200) of the battery cluster; a liquid supply component is provided in the water collecting trough (100), and a filling port is provided on the outer box body of the battery module (200), and the liquid supply component supplies the fire extinguishing medium in the water collecting trough (100) into any of the filling ports through a pipeline component.

2. The lithium battery fire extinguishing system according to claim 1, characterized in that: The filling port is fixedly connected to a filling pipe, and the end of the filling pipe facing the inside of the battery module (200) is rotatably connected to a water splash plate (205), and the side of the water splash plate (205) is provided with a plurality of notches (2051), and the notches (2051) are fixedly connected to a plurality of inclined blades (2052).

3. The lithium battery fire extinguishing system according to claim 2, characterized in that: The water splash plate (205) is provided with a plurality of hollows (2053), wherein the hollows (2053) are located between two adjacent notches (2051), and the hollows (2053) include a plurality of water outlets, wherein one end of the water outlet is close to the center of the water splash plate (205), and the other end does not pass through the edge of the water splash plate (205).

4. The lithium battery fire extinguishing system according to claim 2, characterized in that: The water splash plate (205) is fixedly connected with a rotating shaft, and a bracket is rotatably connected to the rotating shaft, and the bracket is fixedly connected to the inner wall of the perfusion pipe.

5. The lithium battery fire extinguishing system according to claim 2, characterized in that: The pipeline assembly comprises a fire extinguishing pipeline (201) arranged on one side of the battery cluster, a plurality of the perfusion pipes are fixedly connected to and communicate with the fire extinguishing pipeline (201), a solenoid valve (202) is fixedly connected to the perfusion pipe, and the liquid supply assembly is connected to the fire extinguishing pipeline (201).

6. The lithium battery fire extinguishing system according to claim 5, characterized in that: The liquid supply assembly comprises a water pump (101) arranged in the water collecting tank (100); the liquid outlet end of the water pump (101) is fixedly connected to and communicates with the fire extinguishing pipeline (201); and a water level sensor (102) is fixedly connected in the water collecting tank (100).

7. The lithium battery fire extinguishing system according to claim 1, characterized in that: Two flow-guiding protrusions (203) are fixedly connected to the side wall of the outer box of the battery module (200), the two flow-guiding protrusions (203) are arranged in a figure eight shape, the top ends of the two flow-guiding protrusions (203) are fixedly connected, and the flow-guiding protrusions (203) are located below the filling port.

8. The lithium battery fire extinguishing system according to claim 1, characterized in that: The inner shape of the water collecting trough (100) is an inverted cone, and one side of the water collecting trough (100) is detachably connected with an opening and closing outer edge (103).

9. The lithium battery fire extinguishing system according to claim 8, characterized in that: A high temperature resistant rubber ring is provided on the side wall where the opening and closing outer edge (103) contacts the water collecting tank (100).

10. The lithium battery fire extinguishing system according to claim 1, characterized in that: An infrared flame detection system is provided in the energy storage cabin (400), and the fire-fighting water monitor (300) is electrically connected to the infrared flame detection system.

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