Multifunctional lithium battery thermal runaway suppression device capable of rapidly exhausting smoke

Abstract

The invention discloses a multifunctional lithium battery thermal runaway suppression device capable of rapidly exhausting smoke, the multifunctional lithium battery thermal runaway suppression device comprises a lithium battery box, a cylindrical shell and a venturi mixer, mixing boxes are fixed at two ends of the lithium battery box, exhaust ports are formed in the mixing boxes, the mixing boxes are communicated with an outlet of the venturi mixer through a mixing discharge pipe, and the venturi mixer is connected with the cylindrical shell. And an injection opening of the Venturi mixer communicates with the lithium battery box through an injection pipe, the cylindrical shell is filled with a liquid perfluorohexanone fire extinguishing agent, and the two ends of the cylindrical shell are sleeved with a first sealing plug and a second sealing plug correspondingly. Thermal runaway gas of the lithium battery is guided out, mixed with the fire extinguishing agent and then discharged, so that energy release of the thermal runaway battery is guaranteed, and fire spreading is delayed; and after the generated perfluorohexanone gas-liquid two-phase gas is mixed with the thermal runaway gas, the thermal runaway gas is efficiently inerted and cooled, so that the thermal runaway gas is prevented from being spontaneously combusted after being in contact with air or being ignited by external short-circuit sparks.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal runaway protection for lithium battery boxes, and in particular to a multifunctional lithium battery thermal runaway suppression device capable of rapidly exhausting smoke. Background Art

[0002] The consequences of thermal runaway of lithium batteries will cause great damage to the battery box, especially high temperature will cause cascading thermal runaway of surrounding batteries, leading to the risk of burning the entire vehicle; and intervention after thermal runaway of the battery is more difficult and requires more costs. Before thermal runaway occurs, a large amount of gas will be generated in traditional lithium battery boxes. If these gases are not quickly transferred and cooled, they are easy to spontaneously combust after contact with air or be ignited by external short-circuit sparks, which is very dangerous. In order to slow down the spread of fire, we propose a multifunctional lithium battery thermal runaway suppression device that can quickly exhaust smoke. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a multifunctional lithium battery thermal runaway suppression device that can quickly exhaust smoke.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust comprises a lithium battery box, a cylindrical shell and a venturi mixer, wherein a mixing box is fixed at both ends of the lithium battery box, an exhaust port is provided on the mixing box, the mixing box is connected to the outlet of the venturi mixer through a mixing discharge pipe, the ejection port of the venturi mixer is connected to the lithium battery box through an ejection pipe, the interior of the cylindrical shell is filled with a liquid perfluorohexanone fire extinguishing agent, a first sealing plug and a second sealing plug are respectively sleeved at both ends of the cylindrical shell, a flow guide pipe connected to the cylindrical shell is sleeved in the first sealing plug, a pipe plug is sleeved at one end of the flow guide pipe, an injection pipe is connected to the pipe plug, the injection pipe is connected to the inlet of the venturi mixer through a feed pipe, the flow guide pipe and the pipe plug are separated by an explosion-proof membrane, a driving module and a starting module are installed in the second sealing plug, the starting module is used to trigger the action of the driving module, and the driving module is used to heat the perfluorohexanone fire extinguishing agent and vaporize it.

[0006] Preferably, a second rubber gasket is fixed to one end of the pipe plug, the second rubber gasket presses against the edge of the explosion-proof membrane, and a first rubber gasket is sleeved inside the guide tube, the first rubber gasket presses against the edge of the explosion-proof membrane.

[0007] Preferably, a storage groove is fixed on the side of the lithium battery box, the cylindrical shell is placed in the storage groove, and a clamping mechanism for fixing the cylindrical shell is installed in the storage groove.

[0008] Preferably, the clamping mechanism includes a knob, a screw, and an arc-shaped clamping plate. The screw is threadedly sleeved on the storage slot. A knob is fixed to one end of the screw, and an arc-shaped clamping plate is rotatably sleeved on the other end of the screw. The arc-shaped clamping plate is clamped on the cylindrical shell.

[0009] Preferably, a box cover is installed on the lithium battery box, and a slot cover is installed on the storage slot.

[0010] Preferably, one end of the ejector tube located inside the lithium battery box is connected to a first conical cover.

[0011] Preferably, one end of the mixing discharge pipe located inside the mixing box is connected to a second conical cover.

[0012] Preferably, two orifice plates are fixedly sleeved inside the mixing box, and a plurality of rotating shafts are rotatably mounted between the two orifice plates, and axial flow blades are fixed on the rotating shafts.

[0013] Preferably, a discharge valve is installed in the exhaust port of the mixing box.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the present invention, the start module triggers the drive module to operate, and the drive module is used to heat the perfluorohexanone fire extinguishing agent and vaporize it. When the pressure of the vaporized perfluorohexanone reaches a certain value, the explosion-proof membrane is pushed open. At this time, the vaporized perfluorohexanone passes through the guide pipe, the injection pipe, and the feed pipe in sequence and enters the venturi mixer. The high-speed flowing perfluorohexanone generates negative pressure when passing through the venturi mixer and is exhausted from the lithium battery box through the ejector pipe. The exhausted gas enters the venturi mixer and is mixed with the perfluorohexanone, and then is discharged into the mixing box through the mixing discharge pipe for re-mixing. The mixing effect can be improved by the provided axial flow blades, and the gas is discharged through the pressure relief valve after mixing.

[0016] In the present invention, the thermal runaway gas of the lithium battery is guided out, mixed with the fire extinguishing agent and then discharged, which not only ensures the release of the thermal runaway battery energy, but also delays the spread of fire; the generated perfluorohexanone gas-liquid two-phase gas is mixed with the thermal runaway gas, and the thermal runaway gas is efficiently inerted and cooled, so as to prevent the thermal runaway gas from spontaneously combusting after contacting the air or being ignited by external short-circuit sparks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A top view of a multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust proposed by the present invention;

[0018] Figure 2 A schematic diagram of the structure of a clamping mechanism of a multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust proposed by the present invention;

[0019] Figure 3 A cross-sectional view of a cylindrical shell of a multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust proposed by the present invention;

[0020] Figure 4 for Figure 3 Schematic diagram of the local structure;

[0021] Figure 5 A cross-sectional view of a mixing box of a multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust proposed by the present invention.

[0022] In the figure: 1 lithium battery box, 2 cylindrical shell, 3 feed pipe, 4 venturi mixer, 5 ejector tube, 6 first conical cover, 7 mixing discharge pipe, 8 mixing box, 9 box cover, 10 arc clamp, 11 knob, 12 screw, 13 storage slot, 14 slot cover, 15 injection pipe, 16 guide pipe, 17 first sealing plug, 18 perfluorohexanone fire extinguishing agent, 19 drive module, 20 starting module, 21 second sealing plug, 22 second rubber gasket, 23 pipe plug, 24 explosion-proof membrane, 25 first rubber gasket, 26 discharge valve, 27 orifice plate, 28 axial flow blade, 29 rotating shaft, 30 second conical cover. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5A multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust comprises a lithium battery box 1, a cylindrical shell 2 and a venturi mixer 4, a box cover 9 is installed on the lithium battery box 1, a mixing box 8 is fixed at both ends of the lithium battery box 1, two orifice plates 27 are fixedly sleeved inside the mixing box 8, a plurality of rotating shafts 29 are rotatably installed between the two orifice plates 27, an axial flow blade 28 is fixed on the rotating shaft 29, an exhaust port is opened on the mixing box 8, a discharge valve 26 is installed in the exhaust port of the mixing box 8, the mixing box 8 is connected to the outlet of the venturi mixer 4 through a mixing discharge pipe 7, one end of the mixing discharge pipe 7 located inside the mixing box 8 is connected to a second conical cover 30, and the venturi mixer The ejection port of the device 4 is connected to the lithium battery box 1 through the ejection pipe 5, and one end of the ejection pipe 5 located inside the lithium battery box 1 is connected to the first conical cover 6. The interior of the cylindrical shell 2 is filled with liquid perfluorohexanone fire extinguishing agent 18. The two ends of the cylindrical shell 2 are respectively sleeved with a first sealing plug 17 and a second sealing plug 21. The first sealing plug 17 is sleeved with a guide pipe 16 connected to the cylindrical shell 2. One end of the guide pipe 16 is sleeved with a pipe plug 23. The pipe plug 23 is connected with an injection pipe 15. The injection pipe 15 is connected to the inlet of the venturi mixer 4 through the feed pipe 3. The guide pipe 16 and the pipe plug 23 are separated by an explosion-proof membrane 24. One end of the pipe plug 23 is fixed with a second rubber gasket 22 , the second rubber gasket 22 is pressed against the edge of the explosion-proof membrane 24, the first rubber gasket 25 is sleeved inside the guide tube 16, and the first rubber gasket 25 is pressed against the edge of the explosion-proof membrane 24. The driving module 19 and the starting module 20 are installed in the second sealing plug 21. When the lithium battery has thermal runaway, the starting module 20 triggers the driving module 19 to operate. The driving module 19 is used to heat the perfluorohexanone fire extinguishing agent 18 and vaporize it. When the pressure of the vaporized perfluorohexanone reaches a certain value, the explosion-proof membrane 24 is pushed open. At this time, the vaporized perfluorohexanone passes through the guide tube 16, the injection pipe 15, the feed pipe 3 in turn and enters the venturi mixer 4. The high-speed flowing perfluorohexanone passes through the venturi mixer 4. When the venturi mixer 4 is in operation, negative pressure is generated and air is extracted from the lithium battery box 1 through the ejector tube 5. The extracted gas enters the venturi mixer 4 and is mixed with perfluorohexanone, and then discharged into the mixing box 8 through the mixing discharge pipe 7 for further mixing. The mixing effect can be improved by the axial flow blades 28 provided. After mixing, the gas is discharged through the pressure relief valve 26. In this way, the thermal runaway gas of the lithium battery is guided out, mixed with the fire extinguishing agent, and then discharged externally, which not only ensures the release of the energy of the thermal runaway battery, but also delays the spread of the fire. After the generated perfluorohexanone gas-liquid two-phase gas is mixed with the thermal runaway gas, the thermal runaway gas is efficiently inerted and cooled, so as to prevent the thermal runaway gas from spontaneously igniting after contacting the air or being ignited by an external short-circuit spark.

[0025] Reference Figure 2A storage groove 13 is fixed on the side of the lithium battery box 1, and the cylindrical shell 2 is placed in the storage groove 13. A clamping mechanism for fixing the cylindrical shell 2 is installed in the storage groove 13, and the clamping mechanism includes a knob 11, a screw 12, and an arc-shaped clamping plate 10. The screw 12 is sleeved on the storage groove 13 through a thread. The knob 11 is fixed on one end of the screw 12, and the arc-shaped clamping plate 10 is rotatably sleeved on the other end of the screw 12. The arc-shaped clamping plate 10 is clamped on the cylindrical shell 2, and a slot cover 14 is installed on the storage groove 13. The cylindrical shell 2 can be clamped and fixed in the storage groove 13 through the arc-shaped clamping plate 10.

[0026] Working principle: When the lithium battery has thermal runaway, the start module 20 triggers the drive module 19 to operate. The drive module 19 is used to heat the perfluorohexanone fire extinguishing agent 18 and vaporize it. When the pressure of the vaporized perfluorohexanone reaches a certain value, the explosion-proof membrane 24 is pushed open. At this time, the vaporized perfluorohexanone passes through the guide tube 16, the injection tube 15, the feed tube 3 in turn and enters the venturi mixer 4. The high-speed flowing perfluorohexanone generates negative pressure when passing through the venturi mixer 4 and is exhausted from the lithium battery box 1 through the ejector tube 5. The exhausted gas enters the venturi After the mixer 4 is mixed with perfluorohexanone, it is discharged into the mixing box 8 through the mixing discharge pipe 7 for further mixing. The mixing effect can be improved by the axial flow blades 28 provided. After mixing, it is discharged through the pressure relief valve 26. In this way, the thermal runaway gas of the lithium battery is guided out, mixed with the fire extinguishing agent and then discharged, which not only ensures the release of the energy of the thermal runaway battery, but also delays the spread of the fire. After the generated perfluorohexanone gas-liquid two-phase gas is mixed with the thermal runaway gas, the thermal runaway gas is efficiently inerted and cooled to prevent the thermal runaway gas from spontaneously igniting after contacting the air or being ignited by an external short-circuit spark.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust, comprising a lithium battery box (1), a cylindrical shell (2) and a Venturi mixer (4), characterized in that: A mixing box (8) is fixed at both ends of the lithium battery box (1), and an exhaust port is provided on the mixing box (8). The mixing box (8) is connected to the outlet of the venturi mixer (4) through a mixing discharge pipe (7), and the ejection port of the venturi mixer (4) is connected to the lithium battery box (1) through an ejection pipe (5). The interior of the cylindrical shell (2) is filled with liquid perfluorohexanone fire extinguishing agent (18). The two ends of the cylindrical shell (2) are respectively sleeved with a first sealing plug (17) and a second sealing plug (21). The first sealing plug (17) is sleeved with a guide plug (21) connected to the cylindrical shell (2). A pipe (16) is provided, one end of the flow guide pipe (16) is sleeved with a pipe plug (23), the pipe plug (23) is connected to an injection pipe (15), the injection pipe (15) is connected to the inlet of a venturi mixer (4) through a feed pipe (3), the flow guide pipe (16) and the pipe plug (23) are separated by an explosion-proof membrane (24), a driving module (19) and a starting module (20) are installed in the second sealing plug (21), the starting module (20) is used to trigger the action of the driving module (19), and the driving module (19) is used to heat the perfluorohexanone fire extinguishing agent (18) and vaporize it.

2. The multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust according to claim 1, characterized in that: A second rubber gasket (22) is fixed to one end of the pipe plug (23), and the second rubber gasket (22) is pressed against the edge of the explosion-proof membrane (24). A first rubber gasket (25) is sleeved inside the flow guide tube (16), and the first rubber gasket (25) is pressed against the edge of the explosion-proof membrane (24).

3. The multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust according to claim 1, characterized in that: A storage groove (13) is fixed on the side of the lithium battery box (1), the cylindrical shell (2) is placed in the storage groove (13), and a clamping mechanism for fixing the cylindrical shell (2) is installed in the storage groove (13).

4. The multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust according to claim 3, characterized in that: The clamping mechanism comprises a knob (11), a screw rod (12), and an arc-shaped clamping plate (10); the screw rod (12) is sleeved on the storage groove (13) through a thread; one end of the screw rod (12) is fixed with the knob (11); the other end of the screw rod (12) is rotatably sleeved with the arc-shaped clamping plate (10); and the arc-shaped clamping plate (10) is clamped on the cylindrical shell (2).

5. The multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust according to claim 4, characterized in that: The lithium battery box (1) is provided with a box cover (9), and the storage slot (13) is provided with a slot cover (14).

6. The multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust according to claim 1, characterized in that: One end of the ejector tube (5) located inside the lithium battery box (1) is connected to a first conical cover (6).

7. The multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust according to claim 1, characterized in that: One end of the mixing discharge pipe (7) located inside the mixing box (8) is connected to a second conical cover (30).

8. The multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust according to claim 1, characterized in that: Two orifice plates (27) are fixedly sleeved inside the mixing box (8), a plurality of rotating shafts (29) are rotatably mounted between the two orifice plates (27), and axial flow blades (28) are fixed on the rotating shafts (29).

9. The multifunctional lithium battery thermal runaway suppression device capable of rapid smoke exhaust according to claim 8, characterized in that: A discharge valve (26) is installed in the exhaust port of the mixing box (8).

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