Multi-phase synergistic fire extinguishing device for lithium battery energy storage fire

Abstract

The multi-phase synergistic fire extinguishing device comprises a tank body, an air outlet pipe is arranged at the top of the tank body, a fire extinguishing agent storage unit is installed in the tank body, the fire extinguishing agent storage unit communicates with the air outlet pipe through a conveying pipe unit, the conveying pipe unit comprises a conveying pipe and a collecting pipe, and the top end of the conveying pipe communicates with the air outlet pipe; a plurality of guide vane sets connected in series are arranged in the conveying pipe, each guide vane set comprises two spiral guide vanes, and the end faces of the adjacent spiral guide vanes are perpendicular to each other. The collecting pipe outlet is communicated with the bottom end of the collecting pipe; a plurality of feeding channels are arranged on the surface of the collecting pipe; the fire extinguishing agent storage unit comprises a main fire extinguishing agent storage tank and a plurality of auxiliary fire extinguishing agent storage tanks; the multi-phase fire extinguishing agent synergistic effect can be achieved according to requirements, so that the fire source temperature is rapidly reduced, the fire extinguishing efficiency is improved, and through the effects of the conveying pipe and the guide vane set, it can be ensured that the multi-phase fire extinguishing agent is fully mixed before injection, and uniform multi-phase fluid is formed.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium-ion battery safety and fire protection, and particularly to a multiphase collaborative fire extinguishing device for lithium battery energy storage fires. Background Art

[0002] With the advancement of the construction of new power systems, lithium battery energy storage technology has been widely applied in scenarios such as photovoltaic power generation, power grid peak shaving, and industrial energy use. Especially in centralized energy storage power stations, large-scale battery systems applied in groups have become the mainstream form of electrochemical energy storage. However, lithium batteries inherently have poor thermal stability. When encountering abnormal conditions such as overcharging, internal short circuits, out-of-control thermal environments, or mechanical damage, they are extremely prone to thermal runaway reactions, rapidly releasing a large amount of heat and combustible gases, leading to fire accidents.

[0003] Traditional fire extinguishing means (such as water, dry powder, foam, etc.) have limited application effects in lithium battery energy storage scenarios: on the one hand, the cooling efficiency is difficult to keep up with the heat release rate of the internal battery reaction, and it is impossible to effectively interrupt thermal runaway; on the other hand, existing fire extinguishing systems are mostly aimed at single-phase fires, lacking multi-dimensional coverage and anti-rekindling capabilities. Especially in the face of complex battery compartment layouts and closed environments, the fire extinguishing effect is more limited. Therefore, there is an urgent need to develop a fire extinguishing device suitable for lithium battery energy storage system scenarios, with the collaborative action of multiphase fire extinguishing agents and an efficient delivery mechanism, to achieve rapid cooling, effectively block oxygen, inhibit thermal chain reactions, and prevent rekindling in complex and easily spreading fire situations, thereby comprehensively improving the intrinsic safety level of the energy storage system. Summary of the Invention

[0004] The purpose of the present invention is to provide a multiphase collaborative fire extinguishing device for lithium battery energy storage fires, which can effectively solve the problems existing in the above-mentioned prior art.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: A multiphase collaborative fire extinguishing device for lithium battery energy storage fires, including a tank body. An air outlet pipe is provided at the top of the tank body, and a fire extinguishing agent storage unit is installed inside the tank body. The fire extinguishing agent storage unit is communicated with the air outlet pipe through a delivery pipe unit. The delivery pipe unit includes:

[0006] A delivery pipe, the top end of which is communicated with the air outlet pipe. A number of groups of series-connected flow guiding vane groups are arranged inside the delivery pipe. Each group of flow guiding vane groups includes two spiral flow guiding vanes, and the end faces of adjacent spiral flow guiding vanes are perpendicular to each other.

[0007] A confluence pipe, the outlet of which is communicated with the bottom end of the confluence pipe; a number of feed channels are arranged on the surface of the confluence pipe.

[0008] The fire extinguishing agent storage unit includes a main fire extinguishing agent storage tank and a plurality of auxiliary fire extinguishing agent storage tanks. The output end of the main fire extinguishing agent storage tank is communicated with the bottom of the manifold pipe. A secondary pipe is provided at the output end of each of the auxiliary fire extinguishing agent storage tanks, and the secondary pipe is communicated with at least one feed channel.

[0009] Preferably, a stirring unit is installed at one or both ends of the conveying pipe. The stirring unit includes a central shaft arranged along the axis of the conveying pipe and a plurality of stirring blades installed on the central shaft. The inner guiding angle of each stirring blade is smaller than the outer guiding angle.

[0010] Preferably, both sides of each spiral guiding blade synchronously guide the fire extinguishing agent to the adjacent spiral guiding blade.

[0011] Preferably, a mixing trough is provided at the center of the guiding blades in one or more groups of guiding blade groups. Deflecting plates are staggeredly installed at the two openings of the mixing trough, and the deflecting plates guide a part of the fire extinguishing agent on one side of the guiding blade to pass through the mixing trough and enter the other side of the guiding blade.

[0012] Preferably, the secondary pipe is spirally wound around the outside of the manifold pipe. A plurality of feed channels are provided on the manifold pipe along the winding paths of the secondary pipes. The secondary pipe guides the fire extinguishing agent in the auxiliary fire extinguishing agent storage tank to enter the manifold pipe from any one or more of the feed channels on the corresponding winding paths.

[0013] Preferably, each secondary pipe is spirally wound around the outside of the manifold pipe for at least one turn. The two ends of the secondary pipe are converged through a central pipe and connected to the output end of the auxiliary fire extinguishing agent storage tank. The central pipe is used to guide the fire extinguishing agent in the auxiliary fire extinguishing agent storage tank to enter the secondary pipe synchronously from both ends of the secondary pipe.

[0014] Preferably, the feed channel is in a flared shape, and the opening diameter of the feed channel on the side close to the secondary pipe is larger than the opening diameter on the side facing the inside of the manifold pipe.

[0015] Preferably, a diversion channel is installed at each feed channel in the manifold pipe. The inlet of the diversion channel is connected to the inner wall of the manifold pipe near the opening of the feed channel, and the outlet of the diversion channel is inclined towards the axis direction of the manifold pipe; and

[0016] A cover plate is provided at each feed channel in the manifold pipe. One end of the cover plate is movably connected to the inner wall of the manifold pipe. The cover plate is configured to rotate towards the flowing direction of the fire extinguishing agent to open the outlet of the diversion channel, or to close the outlet of the diversion channel when the cover plate resets.

[0017] Preferably, an elastic block is installed between the cover plate and the inner wall of the manifold tube. The elastic block tends to drive the cover plate to move back to its original position and close the drainage outlet. When the elastic block is in its natural state, the surface facing the axis of the manifold tube is an inclined plane sloping downward; and

[0018] When the elastic block is compressed, the inclined plane bulges and deforms towards the axis of the manifold tube.

[0019] Preferably, valves are installed at the output end of the main fire extinguishing agent storage tank and the output ends of each of the auxiliary fire extinguishing agent storage tanks.

[0020] Beneficial effects: Through the cooperation of the main fire extinguishing agent storage tank and several auxiliary fire extinguishing agent storage tanks, the present invention can carry out the synergistic action of multi-phase fire extinguishing agents according to requirements, thereby rapidly reducing the temperature of the fire source, isolating oxygen, inhibiting the spread of thermal runaway and preventing re-ignition, improving the fire extinguishing efficiency. Through the action of the delivery pipe and the guide vane group, it can ensure that the multi-phase fire extinguishing agents are fully mixed before spraying to form a uniform multi-phase fluid;

[0021] Among them, multiple groups of serially connected guide vane groups can guide the transmitted multi-phase fire extinguishing agents to rotate multiple times and then be divided, fully mixing various fire extinguishing agents, improving the mixing efficiency of the fire extinguishing agents, ensuring that the sprayed fluid can evenly cover the fire source, and improving the fire extinguishing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0023] In the drawings:

[0024] Figure 1 is a schematic structural diagram of the multi-phase synergistic fire extinguishing device of the present invention;

[0025] Figure 2 is a schematic structural diagram of the fire extinguishing agent storage unit of the present invention;

[0026] Figure 3 is a front view of the fire extinguishing agent storage unit of the present invention;

[0027] Figure 4 is a schematic structural diagram of the delivery pipe unit of the present invention;

[0028] Figure 5 is a front view of the delivery pipe unit of the present invention;

[0029] Figure 6 is a schematic structural diagram of a single auxiliary fire extinguishing agent storage tank and an auxiliary pipe of the present invention;

[0030] Figure 7 is a schematic structural diagram of a single guide vane of the present invention;

[0031] Figure 8 It is a schematic structural diagram of the drainage channel of the present invention.

[0032] Reference numerals in the figure: 1, tank body; 2, air outlet pipe; 3, conveying pipe; 4, guide vane; 5, confluence pipe; 6, feed channel; 7, main fire extinguishing agent storage tank; 8, auxiliary fire extinguishing agent storage tank; 9, auxiliary pipe; 91, through hole; 10, central axis; 11, stirring blade; 12, mixing trough; 13, guide plate; 14, central pipe; 15, drainage channel; 151, drainage inlet; 152, drainage outlet; 16, cover plate; 17, elastic block; 171, inclined surface; 18, valve; 19, control switch; 20, electric wire; 21, support frame. Specific embodiments

[0033] The embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. The terms used in the embodiments of the present invention are only used to explain the specific embodiments of the present invention, and are not intended to limit the present invention. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0034] Embodiment 1: A multiphase collaborative fire extinguishing device for lithium battery energy storage fires, including a tank body 1, an air outlet pipe 2 is arranged at the top of the tank body 1, a fire extinguishing agent storage unit is installed inside the tank body 1, and the fire extinguishing agent storage unit is communicated with the air outlet pipe 2 through a conveying pipe 3 unit. The conveying pipe 3 unit includes a conveying pipe 3 and a confluence pipe 5. The top end of the conveying pipe 3 is communicated with the air outlet pipe 2. A plurality of groups of series-connected guide vanes 4 are arranged inside the conveying pipe 3. Each group of guide vanes 4 includes two spiral guide vanes 4, and the end faces of adjacent spiral guide vanes 4 are perpendicular to each other; the outlet of the confluence pipe 5 is communicated with the bottom end of the confluence pipe 5; a plurality of feed channels 6 are arranged on the surface of the confluence pipe 5; the fire extinguishing agent storage unit includes a main fire extinguishing agent storage tank 7 and a plurality of auxiliary fire extinguishing agent storage tanks 8. The output end of the main fire extinguishing agent storage tank 7 is communicated with the bottom of the confluence pipe 5. A sub-pipe 9 is arranged at the output end of each auxiliary fire extinguishing agent storage tank 8, and the sub-pipe 9 is communicated with at least one feed channel 6.

[0035] Refer to Figures 1-3 As shown, in this embodiment, taking two auxiliary fire extinguishing agent storage tanks 8 as an example, the main fire extinguishing agent storage tank 7 is located at the bottommost inside the tank body 1. The two auxiliary fire extinguishing agent storage tanks 8 are located on both sides of the conveying pipe 3, and three support frames 21 are arranged on the two auxiliary fire extinguishing agent storage tanks 8. The auxiliary fire extinguishing agent storage tanks 8 are stably installed inside the tank body 1 through the three support frames 21, and the main fire extinguishing agent storage tank 7 or any auxiliary fire extinguishing agent storage tank 8 can be independently disassembled for replacement according to requirements;

[0036] In this embodiment, liquid nitrogen, liquid CO2, and solid microcapsules are used as fire extinguishing agents. Any fire extinguishing agent can be selected as the main fire extinguishing agent according to requirements and filled in the main fire extinguishing agent storage tank 7, and the rest are filled in the two auxiliary fire extinguishing agent storage tanks 8. The rapid cooling effect of liquid nitrogen can quickly reduce the temperature of the fire source to -196°C. At the same time, the released inert nitrogen dilutes the oxygen concentration, fundamentally cutting off the combustion conditions and inhibiting the combustion chain reaction. Liquid CO2, as a cooling and fire extinguishing medium, can further cool the fire source and participate in oxygen isolation, enhancing the fire extinguishing effect. The solid microcapsules expand and rupture in a high-temperature environment, releasing cooling gas and flame retardant foam, forming a dense protective layer on the surface of the fire source, effectively isolating oxygen and preventing the spread of thermal runaway. The flame retardant particles decompose at high temperatures to release water vapor and inert gases, not only further absorbing heat and reducing the temperature, but also forming a heat insulation layer on the surface of the fire source, effectively delaying heat transfer and preventing re-ignition;

[0037] Among them, as shown in reference to Figures 4-5 At both ends of the conveying pipe 3, stirring units are installed. The stirring unit includes a central shaft 10 arranged along the axis of the conveying pipe 3 and several stirring vanes 11 installed on the central shaft 10. The inner guiding angle of each stirring vane 11 is smaller than the outer guiding angle.

[0038] Based on the above, when fire extinguishing operations are carried out, the fire extinguishing agents in the two auxiliary fire extinguishing agent storage tanks 8 enter the confluence pipe 5 through the auxiliary pipe 9, and are jointly transported along the confluence pipe 5 to one end of the conveying pipe 3 with the fire extinguishing agent in the main fire extinguishing agent storage tank 7. Through the rotation of the stirring vanes 11 in the stirring unit at this end, the three fire extinguishing agents are pre-mixed and stirred. The three stirred fire extinguishing agents enter the stirring vanes 11 and flow along multiple groups of series-connected guiding vanes 4. Among them, both sides of each spiral guiding vane 4 synchronously guide the fire extinguishing agent to the adjacent spiral guiding vane 4. Under the action of multiple groups of series-connected guiding vanes 4, the flow direction of the three fire extinguishing agents is driven to rotate and divide multiple times, so as to fully blend and mix the three fire extinguishing agents, ensuring that liquid nitrogen, CO2, and solid particles (microcapsules and flame retardants) are fully mixed before spraying, forming a uniform three-phase fluid; then it is output through the air outlet pipe 2, realizing multiple functions of rapid cooling, foam coverage, and gas isolation, greatly reducing the risk of secondary pollution; compared with traditional fire extinguishing technologies, the fire extinguishing speed of the present invention is faster, the cooling effect is more significant, and it has the dual functions of physical isolation and chemical inhibition at the same time;

[0039] Among them, in this embodiment, valves 18 are installed at the output end of the main fire extinguishing agent storage tank 7 and the output ends of each auxiliary fire extinguishing agent storage tank 8. Single or mixed fire extinguishing agents can be selected for fire extinguishing according to the actual fire situation, and the corresponding valves 18 can be opened or closed; for the control of the valves 18, it can be set according to requirements. For example, as shown in reference to Figure 1As shown in the figure, an electric valve 18 is provided. The control is achieved by setting a corresponding control switch 19 on the tank body 1 and connecting it to the corresponding electric valve 18 through a wire 20. Alternatively, a manual valve 18 (not shown in the figure) can be set, that is, the valve stem of the valve 18 is extended to the outside of the tank body 1, and the control is carried out by manual rotation.

[0040] Embodiment 2: On the basis of Embodiment 1, in this embodiment, a mixing flow groove 12 is provided at the center of the guiding vanes 4 in one or more groups of guiding vanes 4. Deflector plates 13 are staggeredly installed at the two openings of the mixing flow groove 12. The deflector plates 13 guide a part of the fire extinguishing agent on one side of the guiding vanes 4 to pass through the mixing flow groove 12 and enter the other side of the guiding vanes 4.

[0041] Reference Figure 6 As shown in the figure, taking a single guiding vane 4 as an example, a mixing flow groove 12 is provided at the center of the guiding vane 4 and perpendicular to the fire extinguishing agent conveying direction. An inclined deflector plate 13 is provided on the upper side of the mixing flow groove 12 and close to the fire extinguishing agent conveying side. The deflector plate 13 extends towards the lower side of the mixing flow groove 12. Similarly, an inclined deflector plate 13 is provided on the lower side of the mixing flow groove 12 and close to the fire extinguishing agent conveying side. The deflector plate 13 extends towards the upper side of the mixing flow groove 12. When the fire extinguishing agent flows along the guiding vane 4, the fire extinguishing agent flowing on the upper side flows to the mixing flow groove 12, and part of the fire extinguishing agent will flow through the mixing flow groove 12 along the deflector plate 13 and enter the lower side, and is injected into the fire extinguishing agent flowing on the lower side. Similarly, part of the fire extinguishing agent on the lower side flows through the mixing flow groove 12 along the deflector plate 13 and enters the upper side, and is injected into the fire extinguishing agent flowing on the upper side, realizing the blending and mixing of the fire extinguishing agent on the single guiding vane 4.

[0042] Furthermore, the deflector plate 13 can be extended to cover the mixing flow groove 12 at the corresponding position, so as to avoid, ensuring that the fire extinguishing agent on the opposite side will not mix in from the other side of the deflector plate 13 and carry out the guiding work of the deflector plate 13.

[0043] Embodiment 3: On the basis of Embodiment 1, reference Figure 4 and Figure 7 As shown in the figure, in this embodiment, the auxiliary pipe 9 is spirally wound around the outside of the confluence pipe 5. A plurality of feed channels 6 are provided on the confluence pipe 5 along the winding path of each auxiliary pipe 9. By providing corresponding through holes 91 on the auxiliary pipe 9, the communication between the auxiliary pipe 9 and the feed channels 6 on the confluence pipe 5 can be achieved. The auxiliary pipe 9 guides the fire extinguishing agent in the auxiliary fire extinguishing agent storage tank 8 to enter the confluence pipe 5 from any one or more feed channels 6 on the corresponding winding path.

[0044] Among them, reference Figure 4 and 7As shown, each secondary pipe 9 is wound around the outside of the manifold pipe 5 for one turn. The two ends of the secondary pipe 9 converge through the central pipe 14 and are connected to the output end of the secondary fire extinguishing agent storage tank 8. The central pipe 14 is used to guide the fire extinguishing agent in the secondary fire extinguishing agent storage tank 8 to enter the secondary pipe 9 synchronously from both ends of the secondary pipe 9.

[0045] The fire extinguishing agent in the secondary fire extinguishing agent storage tank 8 enters the central pipe 14 from the output end, and then is conveyed to both ends of the secondary pipe 9 through the central pipe 14 differently. The fire extinguishing agent flows along the secondary pipe 9 and enters the manifold pipe 5 through the corresponding feed ports of the secondary pipe 9 (which can be defined as the branch fire extinguishing agent). Through the arrangement of the spiral secondary pipe 9, the fire extinguishing agent can be guided to converge in a spiral shape onto the fire extinguishing agent (which can be defined as the main fire extinguishing agent) conveyed from the main fire extinguishing agent storage tank 7 into the manifold pipe 5, so that the branch fire extinguishing agent and the main fire extinguishing agent are intertwined in the manifold pipe 5, avoiding the diversion of multiple strands of fire extinguishing agent and improving the subsequent mixing effect.

[0046] Among them, referring to Figure 8 As shown, the feed channel 6 is in a horn shape. The opening diameter of the feed channel 6 on the side close to the secondary pipe 9 is larger than the opening diameter on the side facing the inside of the manifold pipe 5, so as to guide the branch fire extinguishing agent entering the manifold pipe 5 to form a jet. This setting can not only mix the branch fire extinguishing agent and the main fire extinguishing agent on the surface, but also enable the branch fire extinguishing agent to penetrate into the main fire extinguishing agent in the manifold pipe 5; further improve the mixing efficiency of the fire extinguishing agent to ensure that the jet fluid can evenly cover the fire source and improve the fire extinguishing effect.

[0047] Furthermore, diversion channels 15 are installed at each position of the feed channels 6 in the manifold pipe 5. The diversion inlet 151 of the diversion channel 15 is connected to the inner wall of the manifold pipe 5 near the opening position of the feed channel 6, and the diversion outlet 152 is inclined towards the axis direction of the manifold pipe 5; and covers 16 are provided at each position of the feed channels 6 in the manifold pipe 5. One end of the cover 16 is movably connected to the inner wall of the manifold pipe 5, and the cover 16 is configured to rotate towards the flow direction of the fire extinguishing agent to open the diversion outlet 152, or to close the diversion outlet 152 when the cover 16 resets.

[0048] Based on the above, the branch fire extinguishing agent enters the diversion channel 15 from the feed channel 6 and flows along the diversion channel 15 to the diversion outlet 152. By the action of the branch fire extinguishing agent on the cover 16, the cover 16 is squeezed to swing around the movable connection, so as to open the diversion outlet 152. At this time, the branch fire extinguishing agent enters the manifold pipe 5 and intersects with the main fire extinguishing agent; when the valve 18 on the secondary fire extinguishing agent storage tank 8 is closed, at this time the branch fire extinguishing agent stops being conveyed, and the cover 16 automatically resets and closes the diversion outlet 152 to prevent the fire extinguishing agent in the manifold pipe 5 from flowing back into the diversion channel 15.

[0049] Among them, referring to Figure 8As shown, an elastic block 17 is installed between the cover plate 16 and the inner wall of the manifold pipe 5. The elastic block 17 tends to drive the cover plate 16 to move in a reset manner and close the drainage outlet 152, realizing the automatic reset of the cover plate 16. In the natural state of the elastic block 17, the surface facing the axis of the manifold pipe 5 is an inclined surface 171 that slopes downward. When the elastic block 17 is pressed, its inclined surface 171 bulges and deforms toward the axis of the manifold pipe 5.

[0050] Based on the above, when the valve 18 is closed and there is still a certain amount of extinguishing agent remaining in the manifold pipe 5, a part of the extinguishing agent can slide downward along the inclined surface 171 and gather at the bottom of the manifold pipe 5. For the part of the extinguishing agent remaining on the inclined surface, after the valve 18 is opened, through the convex deformation of the inclined surface toward the axis of the manifold pipe 5, all the extinguishing agent on the inclined surface can be released, reducing the adhesion of the extinguishing agent.

[0051] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. For those of ordinary skill in the art in this technical field, after learning the content recorded in the present invention, without departing from the principle of the present invention, several equivalent transformations and substitutions can still be made, and these equivalent transformations and substitutions should also be regarded as belonging to the protection scope of the present invention.

Claims

1. A multi-phase coordinated fire extinguishing device for lithium battery energy storage fire, comprising a tank body (1), a gas outlet pipe (2) is arranged on the top of the tank body (1), a fire extinguishing agent storage unit is installed inside the tank body (1), and the fire extinguishing agent storage unit is connected to the gas outlet pipe (2) through a delivery pipe (3) unit, characterized in that: The delivery pipe (3) unit comprises: A delivery pipe (3), the top end of which is in communication with the air outlet pipe (2), wherein a plurality of groups of guide blades (4) connected in series are arranged in the delivery pipe (3), each group of the guide blades (4) comprising two spiral guide blades (4), and the end surfaces of adjacent spiral guide blades (4) are perpendicular to each other; A manifold (5), the outlet of which is in communication with the bottom end of the manifold (5); a plurality of feed channels (6) are provided on the surface of the manifold (5); The fire extinguishing agent storage unit comprises a main fire extinguishing agent storage tank (7) and a plurality of auxiliary fire extinguishing agent storage tanks (8), the output end of the main fire extinguishing agent storage tank (7) is connected to the bottom of the manifold (5), and the output end of each auxiliary fire extinguishing agent storage tank (8) is provided with an auxiliary pipe (9), and the auxiliary pipe (9) is connected to at least one feed channel (6).

2. A multi-phase coordinated fire extinguishing device for lithium battery energy storage fire according to claim 1, characterized in that: A stirring unit is installed at one or both ends of the conveying pipe (3), and the stirring unit comprises a central axis (10) arranged along the axial direction of the conveying pipe (3) and a plurality of stirring blades (11) installed on the central axis (10), and the inner layer guide angle of each stirring blade (11) is smaller than the outer layer guide angle.

3. A multi-phase coordinated fire extinguishing device for lithium battery energy storage fire according to claim 1, characterized in that: Both sides of each spiral guide blade (4) synchronously guide the fire extinguishing agent to the adjacent spiral guide blade (4).

4. A multi-phase coordinated fire extinguishing device for lithium battery energy storage fire according to claim 1 or 3, characterized in that: A mixing groove (12) is provided at the center of a guide blade (4) in one or more groups of guide blades (4), and guide plates (13) are installed at two openings of the mixing groove (12) at an interval, and the guide plates (13) guide part of the fire extinguishing agent on one side of the guide blade (4) to pass through the mixing groove (12) and enter the other side of the guide blade (4).

5. A multi-phase coordinated fire extinguishing device for lithium battery energy storage fire according to claim 1, characterized in that: The auxiliary pipe (9) is spirally wound around the outer side of the manifold (5), and a plurality of feed channels (6) are provided on the manifold (5) and on the winding path of each of the auxiliary pipes (9). The auxiliary pipe (9) guides the fire extinguishing agent in the auxiliary fire extinguishing agent storage tank (8) to enter the manifold (5) from any one or more feed channels (6) on the corresponding winding path.

6. A multi-phase coordinated fire extinguishing device for lithium battery energy storage fire according to claim 5, characterized in that: Each of the auxiliary pipes (9) is spirally wound around the outer side of the manifold (5) for at least one turn, and the two ends of the auxiliary pipes (9) are connected to the output end of the auxiliary fire extinguishing agent storage tank (8) after being converged through a central pipe (14). The central pipe (14) is used to guide the fire extinguishing agent in the auxiliary fire extinguishing agent storage tank (8) to enter the auxiliary pipe (9) synchronously from the two ends of the auxiliary pipe (9).

7. A multi-phase coordinated fire extinguishing device for lithium battery energy storage fire according to claim 5 or 6, characterized in that: The feed channel (6) is trumpet-shaped, and the opening diameter of the feed channel (6) close to the auxiliary pipe (9) is larger than the opening diameter of the side facing the inside of the manifold (5).

8. A multi-phase coordinated fire extinguishing device for lithium battery energy storage fire according to claim 7, characterized in that: A drainage channel (15) is installed in each feed channel (6) in the manifold (5), a drainage inlet (151) of the drainage channel (15) is connected to the inner wall of the manifold (5) near the opening of the feed channel (6), and a drainage outlet (152) is inclined toward the axis direction of the manifold (5); and A cover plate (16) is provided in each feed channel (6) in the manifold (5), one end of the cover plate (16) is movably connected to the inner wall of the manifold (5), and the cover plate (16) is configured to rotate toward the flow direction of the fire extinguishing agent to open the drainage outlet (152), or to close the drainage outlet (152) when the cover plate (16) is reset.

9. A multi-phase coordinated fire extinguishing device for lithium battery energy storage fire according to claim 8, characterized in that: An elastic block (17) is installed between the cover plate (16) and the inner wall of the manifold (5), and the elastic block (17) tends to drive the cover plate (16) to reset and close the drainage outlet (152); in a natural state, the surface of the elastic block (17) facing the axis of the manifold (5) is a downwardly inclined inclined surface (171); and When the elastic block (17) is subjected to pressure, the inclined surface (171) thereof is deformed to bulge toward the axial direction of the manifold (5).

10. A multi-phase coordinated fire extinguishing device for lithium battery energy storage fire according to claim 1, characterized in that: The output end of the main fire extinguishing agent storage tank (7) and the output ends of each of the auxiliary fire extinguishing agent storage tanks (8) are both installed with valves (18).

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