Device and method for treating thermal runaway flue gas of battery

Abstract

The invention provides a battery thermal runaway flue gas treatment device and method, and belongs to the technical field of energy storage batteries, and the battery thermal runaway flue gas treatment device is arranged at a flue gas outlet end of a lithium battery or a PACK box. Smoke exhausted from the smoke outlet end is collected through the combustion cavity, and the smoke ignition device can conveniently conduct centralized combustion treatment on combustible gas.

Description

[0001] This application is a divisional application of a patent application with an application date of September 29, 2021, application number 202111154438.1, and invention name “A device and method for treating battery thermal runaway flue gas”. Technical Field

[0002] The present invention belongs to the technical field of energy storage batteries, and relates to a technology for treating combustible gases caused by thermal runaway of energy storage batteries, and specifically to a device and method for treating flue gas caused by thermal runaway of batteries. Background Art

[0003] If the energy storage battery is not operated properly during use, it may cause an internal short circuit or overcharge, which will generate a large amount of heat inside the battery and cause the internal temperature of the battery to rise sharply. When the temperature reaches the limit, the thermal balance of the battery will be destroyed, triggering a series of self-heating side reactions, generating a large amount of flammable gas and causing "thermal runaway". It will eventually cause the battery to catch fire and cause an explosion in severe cases, posing a hidden danger to the personal safety of the user.

[0004] The prior art mainly considers fire extinguishing inside the battery to prevent the fire from spreading; for example: the announcement number is CN205964755U, and the name of the invention is an automatic fire extinguishing device for a battery box, which includes a sensor, an automatic controller, a fire extinguishing agent container, a transmission pipeline and a pressure relief valve. When the sensor senses that the temperature in the battery box reaches the limit value, the automatic controller controls the fire extinguisher in the fire extinguishing agent container to enter the battery box through the transmission pipeline to extinguish the open fire in the battery box and extinguish the hidden fire in the battery core at the same time; the announcement number is CN205569558U, and the name of the invention is an automatic fire extinguishing device for an electric vehicle battery box, which fixes the fire extinguishing agent pipeline on the strip metal sheet suspension in the battery box, and the fire extinguishing agent pipeline is provided with a fire detection tube extending vertically downward at the center of each piece. When a fire occurs in the battery box, the heat detection tube closest to the fire source will be ruptured by the heat, so that the fire extinguishing agent can quickly and effectively extinguish the fire source. Although these two devices can prevent the battery box from exploding, the sensors or heat probes installed in the battery box are easily damaged by fire and cannot be detected, which increases the safety hazard. The prior art also discharges the combustible gas generated by thermal runaway in the battery box out of the battery box, but the combustible gas directly discharged to the outside of the battery box is uncontrollable and easily causes explosion, and also pollutes the environment. Summary of the invention

[0005] In view of the problem that in the above-mentioned prior art, the combustible gas generated by thermal runaway of the energy storage battery is directly discharged outside the battery box, the combustible gas is uncontrollable, easily causes explosion, and also pollutes the environment, the present invention proposes a battery thermal runaway smoke treatment device and treatment method.

[0006] The present invention is to set a combustion box above the smoke outlet end of the lithium battery or PACK box, set a smoke ignition device and a trigger device in the combustion box, trigger the smoke ignition device to ignite through the trigger device, and burn the smoke discharged from the lithium battery or PACK box through the smoke ignition device, burn the smoke completely, and then discharge it into the atmosphere; effectively prevent the pollution of the environment by the combustible gas, the smoke is the above-mentioned combustible gas; the specific technical scheme is as follows:

[0007] A device for processing battery thermal runaway smoke, wherein the device is arranged at the smoke outlet end of a lithium battery or a PACK box.

[0008] It is further defined that the battery thermal runaway smoke processing device includes a smoke ignition device, and the smoke ignition device is used to ignite the smoke discharged from the lithium battery or PACK box due to thermal runaway.

[0009] It is further defined that the smoke ignition device is a pulse igniter or a piezoelectric igniter.

[0010] It is further defined that the battery thermal runaway smoke processing device also includes a trigger device, which triggers the smoke ignition device to ignite through the smoke pressure discharged from the smoke outlet end of the lithium battery or the PACK box.

[0011] It is further defined that the smoke ignition device and the trigger device are both arranged in the combustion chamber outside the smoke outlet end of the lithium battery or PACK box, the trigger device is arranged opposite to the smoke outlet end, and the smoke ignition device is arranged above the trigger device.

[0012] It is further defined that the combustion cavity is an inner cavity of a combustion box, and the combustion box is fixedly connected to a lithium battery or a PACK box.

[0013] It is further defined that the trigger device includes a pressure plug, and the pressure plug is arranged at the smoke outlet end of the lithium battery or the PACK box.

[0014] It is further defined that the trigger device includes a longitudinal sliding rod and a trigger block, both of which are placed in the inner cavity of the combustion box, and the longitudinal sliding rod is fixedly connected to the lithium battery or PACK box; the trigger block is sleeved on the outer side of the longitudinal sliding rod and is slidably connected to the longitudinal sliding rod; the trigger block is arranged opposite to the smoke outlet end of the lithium battery or PACK box, and the smoke ignition device is arranged above the trigger block.

[0015] It is further defined that the lower end surface of the trigger block is an inwardly concave arc surface, and the arc surface is arranged opposite to the smoke outlet end of the lithium battery or the PACK box.

[0016] It is further defined that the trigger block is made of fireproof material, and an arc groove is arranged at the bottom of the trigger block, and the arc groove is arranged opposite to the smoke outlet end of the lithium battery or the PACK box.

[0017] It is further defined that the trigger device also includes a limit block and an elastic reset member, the limit block is fixedly connected to the top of the longitudinal slide rod, the limit block is connected to the trigger block through the elastic reset member, and the limit block is fixedly connected to the smoke ignition device.

[0018] It is further defined that the limit block is fixedly connected to the smoke ignition device via a mounting frame.

[0019] It is further defined that a push switch is provided at the bottom of the smoke ignition device, and the push switch is arranged opposite to the pressure plug or the trigger block.

[0020] It is further defined that a top block is provided on the top of the trigger block, and the top block is arranged opposite to the push switch.

[0021] It is further defined that the battery thermal runaway smoke processing device also includes a flame retardant insulation board, the combustion box and the longitudinal sliding rod are fixedly connected to the lithium battery or PACK box through the flame retardant insulation board, a connecting hole is provided on the flame retardant insulation board, the combustion box is connected to the smoke outlet end through the connecting hole on the flame retardant insulation board, a pressure relief assembly is provided at the smoke outlet end, the pressure relief assembly passes through the flame retardant insulation board and extends into the combustion cavity of the combustion box; the top of the combustion box is open.

[0022] A method for treating battery thermal runaway smoke, comprising the following steps: the smoke generated by the battery thermal runaway is ignited before being discharged into the atmosphere.

[0023] It is further defined that the steps are specifically as follows: under the action of the exhaust smoke pressure in the lithium battery or PACK box, the trigger device is pushed toward the smoke ignition device until the trigger device triggers the smoke ignition device to ignite the smoke, and the smoke after combustion is discharged into the atmosphere.

[0024] Further limiting,

[0025] The steps are specifically as follows: under the action of the smoke pressure discharged from the lithium battery or PACK box, the pressure plug is pushed out of the smoke outlet end, and the pressure plug is moved close to the push switch on the smoke ignition device until the pressure plug opens the push switch, so that the smoke ignition device ignites the smoke.

[0026] Or the specific steps are: under the action of the smoke pressure discharged from the lithium battery or PACK box, the trigger block is pushed towards the smoke ignition device until the top block on the trigger block triggers the press switch on the smoke ignition device to open, so that the smoke ignition device ignites the smoke; when the smoke pressure discharged from the smoke outlet becomes smaller, the trigger block returns to its initial state under the action of the elastic reset member.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention provides a device for treating flue gas caused by thermal runaway of a battery. The flue gas ignition device is arranged outside the flue gas outlet of a lithium battery or a PACK box, so as to facilitate the ignition of the flue gas discharged from the lithium battery or the PACK box, realize the orderly discharge of the flue gas, thereby greatly reducing the content of the combustible components in the flue gas, controlling the flue gas, and preventing the explosion of the flue gas; the flue gas ignition device is arranged in a combustion chamber, and the flue gas discharged from the flue gas outlet is collected through the combustion chamber; a trigger device is also arranged in the combustion chamber, and the trigger device is arranged opposite to the flue gas outlet, and the trigger device is used to trigger the ignition of the flue gas ignition device. The combustion chamber can collect the flue gas in a centralized manner; the trigger device is pushed by the air pressure of the flue gas discharged from the flue gas outlet to approach the flue gas ignition device, trigger the switch of the flue gas ignition device, and prompt the flue gas ignition device to ignite the combustible components in the flue gas, and the gas after combustion is discharged into the atmosphere, thereby avoiding the pollution of the atmosphere by the combustible gas; at the same time, it also avoids the accumulation of the combustible gas in the lithium battery or the PACK box, and the occurrence of dangerous events such as explosion and fire.

[0029] 2. The trigger device includes a pressure plug. The pressure plug pops out from the smoke outlet end under the instantaneous pressure of the smoke, and approaches the smoke ignition device to trigger the smoke ignition device to ignite the smoke. The pressure plug can be opened as long as the smoke pressure reaches the limit pressure value, and the operation is easy to control.

[0030] 3. The trigger device includes a longitudinal slide bar and a trigger block. The gas pressure of the smoke discharged from the smoke outlet end pushes the trigger block to slide along the axial direction of the longitudinal slide bar, approach the switch of the smoke ignition device, and trigger the switch of the smoke ignition device, so that the smoke ignition device ignites the smoke; the trigger device also includes a limit block and an elastic reset member. The limit block is fixedly connected to the top of the longitudinal slide bar. The limit block can prevent the trigger block from detaching from the longitudinal slide bar when the gas pressure is too high. The limit block is connected to the trigger block through the elastic reset member, and the elastic reset member can return to its original state after the trigger block triggers the switch of the smoke ignition device.

[0031] 4. The lower end surface of the trigger block is an inwardly concave arc surface, which increases the force-bearing area of ​​the trigger block; an arc groove is provided at the bottom of the trigger block, and the arc groove is arranged opposite to the smoke outlet end. The air pressure can be gathered through the arc groove, thereby enhancing the pushing effect of the air pressure.

[0032] 5. The limit block is fixedly connected to the smoke ignition device through the mounting frame, and the position of the smoke ignition device is fixed by the mounting frame to prevent the smoke ignition device from shaking when the trigger block triggers the switch of the smoke ignition device, thereby affecting the triggering effect; the mounting frame is fixedly connected to the smoke ignition device through a clamp, and the clamp can facilitate the fixed connection between the mounting frame and the smoke ignition device.

[0033] 6. A top block is arranged on the top of the trigger block, and the top block is arranged opposite to the push switch; the top block can better trigger the work and more conveniently trigger the switch of the smoke ignition device.

[0034] 7. The battery thermal runaway smoke processing device of the present invention also includes a flame retardant insulation board. The combustion box and the longitudinal sliding rod are fixedly connected to the lithium battery or PACK box through the flame retardant insulation board. The lithium battery or PACK box is isolated from the trigger device of the smoke ignition device through the flame retardant insulation board to prevent fire and heat release, so as to prevent the heat generated by the combustion from affecting the normally working energy storage battery in the lithium battery or PACK box. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The structure of the device for treating battery thermal runaway flue gas according to the present invention is shown in FIG. Figure 1 ;

[0036] Figure 2 Schematic diagram of the connection between the trigger device and the lithium battery or PACK box Figure 1 ;

[0037] Figure 3 Schematic diagram of the connection between the trigger device and the lithium battery or PACK box Figure 2 ;

[0038] Figure 4 for Figure 3 Schematic diagram of the structure of the A part;

[0039] Figure 5 is a schematic diagram of the structure of the trigger device;

[0040] Among them, 1-lithium battery or PACK box; 2-pressure relief valve; 3-combustion box; 301-flame retardant insulation board; 4-longitudinal slide bar; 5-smoke ignition device; 501-press switch; 6-trigger block; 601-lower end surface; 602-arc groove; 603-through hole; 604-top block; 7-limit block; 8-mounting frame; 801-clamp; 9-reset spring. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the implementation modes described below.

[0042] The present invention provides a device for processing battery thermal runaway smoke, which is arranged at the smoke outlet end of a lithium battery or a PACK box 1. The device for processing battery thermal runaway smoke includes a smoke ignition device 5, which ignites the smoke discharged from the lithium battery or the PACK box 1 due to thermal runaway. The smoke ignition device 5 is a pulse igniter. The device for processing battery thermal runaway smoke also includes a trigger device, which triggers the smoke ignition device 5 to ignite through the smoke pressure discharged from the smoke outlet end of the lithium battery or the PACK box 1. The smoke ignition device 5 and the trigger device are both arranged in a combustion cavity outside the smoke outlet end of the lithium battery or the PACK box 1, the trigger device is arranged opposite to the smoke outlet end, and the smoke ignition device 5 is arranged above the trigger device. The combustion cavity is the inner cavity of the combustion box 3, and the combustion box 3 is fixedly connected to the lithium battery or the PACK box 1. The trigger device includes a pressure plug, which is arranged at the smoke outlet end of the lithium battery or the PACK box 1. Or the trigger device includes a longitudinal slide bar 4 and a trigger block 6, both of which are placed in the inner cavity of the combustion box 3, and the longitudinal slide bar 4 is fixedly connected to the lithium battery or PACK box 1; the trigger block 6 is sleeved on the outer side of the longitudinal slide bar 4 and slidably connected to the longitudinal slide bar 4; the trigger block 6 is arranged opposite to the smoke outlet end of the lithium battery or PACK box 1, and the smoke ignition device 5 is arranged above the trigger block 6. The lower end surface 601 of the trigger block 6 is a concave arc surface, and the arc surface is arranged opposite to the smoke outlet end of the lithium battery or PACK box 1. The trigger block 6 is made of fireproof material, and an arc groove 602 is arranged at the bottom of the trigger block 6, and the arc groove is arranged opposite to the smoke outlet end of the lithium battery or PACK box 1. The trigger device also includes a limit block 7 and an elastic reset member, the limit block 7 is fixedly connected to the top of the longitudinal slide bar 4, the limit block 6 is connected to the trigger block 6 through the elastic reset member, and the limit block 7 is fixedly connected to the smoke ignition device 5. The limit block 7 is fixedly connected to the smoke ignition device 5 through the mounting bracket 8. A push switch 501 is arranged at the bottom of the smoke ignition device 5, and the push switch 501 is arranged opposite to the pressure plug or the trigger block 6. A top block 604 is arranged on the top of the trigger block 6, and the top block 604 is arranged opposite to the push switch 501. The battery thermal runaway smoke treatment device also includes a flame retardant insulation board 301, and the combustion box 3 and the longitudinal slide bar 4 are fixedly connected to the lithium battery or PACK box 1 through the flame retardant insulation board 301. A connecting hole is arranged on the flame retardant insulation board 301. The combustion box 3 is connected to the smoke outlet end through the connecting hole on the flame retardant insulation board 301. A pressure relief component is arranged at the smoke outlet end, and the pressure relief component passes through the flame retardant insulation board 301 and extends into the combustion cavity of the combustion box 3; the top of the combustion box 3 is open.

[0043] Example 1

[0044] This embodiment provides a device for processing battery thermal runaway smoke, which is arranged at the smoke outlet of a lithium battery or a PACK box 1. The device for processing battery thermal runaway smoke includes a smoke ignition device 5, which ignites the smoke discharged by the lithium battery or the PACK box 1 due to thermal runaway. The lithium battery is a single battery formed by a separate battery pack; the PACK box is a large-capacity box battery formed by connecting multiple lithium batteries in series and parallel.

[0045] The smoke ignition device 5 of this embodiment can be a piezoelectric igniter or a pulse igniter. Preferably, the smoke ignition device of this embodiment is a pulse igniter.

[0046] The battery thermal runaway smoke processing device of this embodiment also includes a trigger device, which triggers the smoke ignition device 5 to ignite through the smoke pressure discharged from the smoke outlet end of the lithium battery or PACK box 1. The smoke ignition device 5 and the trigger device are both arranged in the combustion chamber outside the smoke outlet end of the lithium battery or PACK box 1, the trigger device is arranged opposite to the smoke outlet end, and the smoke ignition device 5 is arranged above the trigger device.

[0047] The combustion cavity of this embodiment is the inner cavity of the combustion box 3, the inner cavity of the combustion bag or the inner cavity formed by other combustion gas gathering containers. Preferably, the combustion cavity of this embodiment is the inner cavity of the combustion box 3, and the combustion box 3 is fixedly connected to the top end surface of the lithium battery or the PACK box 1.

[0048] Preferably, the combustion box 3 of this embodiment is made of metal material or high temperature resistant plastic material.

[0049] A pressure relief component is provided at the smoke outlet end of this embodiment, and the pressure relief component penetrates the flame retardant heat insulation board 301 and extends into the combustion chamber of the combustion box 3. The pressure relief component can be a pressure relief valve 2 or an explosion relief membrane. Preferably, the pressure relief component of this embodiment is a pressure relief valve 2.

[0050] The combustion box 3 of this embodiment is a cylindrical structure with openings at the top and bottom, which can be a cylindrical structure, a columnar cylindrical structure, a conical cylindrical structure or a cylindrical structure of other shapes; preferably, the combustion box 3 of this embodiment is a cylindrical structure. The top opening can discharge the burnt gas in time to prevent the combustion box 3 from being over-pressurized due to gas accumulation and causing the risk of explosion.

[0051] Example 2

[0052] The present embodiment is a device for processing battery thermal runaway smoke. On the basis of Embodiment 1, the trigger device of the present embodiment is a pressure plug. The pressure plug is pressed on the smoke outlet end of the lithium battery or PACK box 1 to seal the inner cavity of the lithium battery or PACK box 1. When smoke is discharged from the inner cavity of the lithium battery or PACK box 1, the pressure plug will be pushed out by the gas pressure of the smoke. The pushed-out pressure plug is used to trigger the smoke ignition device 5 to ignite the smoke.

[0053] Example 3

[0054] See also Figure 1-Figure 3 , This embodiment is a device for treating battery thermal runaway smoke. On the basis of Embodiment 1, its trigger device includes a longitudinal slide bar 4 and a trigger block 6. The longitudinal slide bar 4 and the trigger block 6 are both placed in the combustion chamber of the combustion box 3. The bottom end of the longitudinal slide bar 4 is fixedly connected to the top end surface of the lithium battery or PACK box 1; see Figure 5 A through hole 603 is provided on the trigger block 6, and the longitudinal slide bar 4 passes through the through hole 603 and is sleeved on the outer side of the longitudinal slide bar 4, and is slidably connected with the longitudinal slide bar 4, that is, the trigger block 6 can slide along the axial direction of the longitudinal slide bar 4; the trigger block 6 is arranged opposite to the smoke outlet end, and the smoke ignition device is arranged above the trigger block 6.

[0055] Preferably, there are two longitudinal sliding bars 4 in this embodiment, which are respectively arranged on both sides above the smoke outlet end. The two longitudinal sliding bars 4 can improve the sliding stability of the trigger block 6.

[0056] A push switch 501 is arranged at the bottom of the smoke ignition device of this embodiment. The push switch 501 is arranged opposite to the trigger block 6. The trigger block 6 triggers the push switch to open, so that the smoke ignition device 5 is ignited.

[0057] Preferably, the smoke ignition device 5 of this embodiment is a pulse igniter.

[0058] The trigger device in this embodiment also includes a limit block 7 and an elastic reset member. The limit block 7 is fixedly connected to the top of the longitudinal slide bar 4, the bottom end face of the limit block 7 is fixedly connected to one end of the elastic reset member, the other end of the elastic reset member is fixedly connected to the trigger block 6, and the limit block 7 is fixedly connected to the smoke ignition device.

[0059] The elastic reset member is a reset spring 9 or an elastic pad, and the elastic pad can be made of rubber or plastic. Preferably, the elastic reset member of this embodiment is a reset spring 9.

[0060] Preferably, the bottom end surface of the push switch 501 of this embodiment is located below the bottom end surface of the limit block 7, which can facilitate the contact between the trigger block 6 and the push switch 501 and improve the triggering efficiency.

[0061] Preferably, the trigger block 6 of this embodiment is made of flame-retardant material.

[0062] Preferably, the trigger block 6 of this embodiment is a hollow structure, which can reduce the weight of the trigger block 6 and make the trigger block 6 easier to be pushed.

[0063] Preferably, the lower end surface 601 of the trigger block 6 of this embodiment is an arc-shaped surface with a concave center portion, and the arc-shaped surface is arranged opposite to the smoke outlet end.

[0064] Preferably, in this embodiment, an arc groove 602 with a rectangular cross section is provided at the bottom of the trigger block 6, and the arc groove 602 is arranged opposite to the smoke outlet end.

[0065] Preferably, the trigger block 6 of this embodiment is made of fireproof material to prevent the flame from flowing back into the lithium battery or the PACK box 1 .

[0066] Example 4

[0067] See also Figure 4 This embodiment is a device for processing battery thermal runaway smoke. On the basis of Embodiment 3, a mounting frame 8 is fixedly mounted on a limit block 7, and clamps 801 are arranged at two ends of the mounting frame 8 corresponding to the smoke ignition device 5. The smoke ignition device 5 is fixed by the clamps 801 to prevent the smoke ignition device 5 from shaking when the push switch 501 of the smoke ignition device 5 is triggered.

[0068] Example 5

[0069] This embodiment is a device for processing battery thermal runaway smoke. On the basis of Embodiment 4, a top block 604 is integrally fixedly provided on the top of the trigger block 6 , and the top block 604 is arranged opposite to the push switch 501 .

[0070] Example 6

[0071] The present embodiment provides a device for treating flue gas caused by thermal runaway of a battery. On the basis of Embodiment 5, the device further comprises a flame retardant heat insulation board 301, which is fixedly connected to the top end face of a lithium battery or a PACK box 1, the bottom end face of a combustion box 3 is fixedly connected to the top end face of the flame retardant heat insulation board 301, the top end face of a longitudinal slide bar 4 is fixedly connected to the top end face of the flame retardant heat insulation board 301, a connecting hole is provided on the flame retardant heat insulation board 301, and the combustion box 3 is connected to the flue gas outlet end through the connecting hole on the flame retardant heat insulation board 301; the flame retardant heat insulation board 301 is used to perform fire and heat isolation between the lithium battery or the PACK box 1 and the flue gas ignition device and the trigger device; the pressure relief assembly passes through the flame retardant heat insulation board 301 and extends into the combustion cavity of the combustion box 3; the top of the combustion box 3 is open.

[0072] Preferably, the flame retardant heat insulation board 301 of this embodiment is a rubber-plastic board, a foamed fireproof board or a fireproof rock wool board.

[0073] Example 7

[0074] Based on any one of the battery thermal runaway smoke treatment devices in Example 1 to Example 6, an ignition method for treating battery thermal runaway is implemented, and the steps are: the smoke generated by the battery thermal runaway is ignited before being discharged into the atmosphere.

[0075] Preferably, a method for handling battery thermal runaway smoke of the present embodiment is to push the trigger device toward the smoke ignition device 5 under the action of the smoke pressure exhausted from the lithium battery or PACK box 1 until the trigger device triggers the smoke ignition device 5 to ignite the smoke, and the smoke after combustion is discharged into the atmosphere.

[0076] Example 8

[0077] This embodiment provides an ignition method for handling thermal runaway of a battery. Based on the embodiment 7, the method specifically includes the following steps:

[0078] When a large amount of combustible gas accumulates in the lithium battery or PACK box 1 and the gas pressure reaches the limit, smoke will be discharged from the lithium battery or PACK box 1. Under the action of the instantaneous pressure of the discharged smoke, the pressure plug will be pushed out of the smoke outlet end, and the pressure plug will approach the push switch 501 on the smoke ignition device 5 until the pressure plug collides with the push switch 501 and turns on the push switch 501, so that the smoke ignition device 5 ignites the smoke; after the smoke is ignited, the burnt gas is discharged from the top of the combustion box 3.

[0079] Or specifically include the following steps:

[0080] 1) When a large amount of combustible gas accumulates in the lithium battery or PACK box 1 and the gas pressure reaches the limit, the pressure relief valve 2 or the explosion relief membrane at the smoke outlet end is opened, and the smoke is discharged along the smoke outlet end. The instantaneous pressure of the smoke discharged at the smoke outlet end is used to push the trigger block 6 to approach the smoke ignition device 5 until the top block 604 on the trigger block 6 collides with the push switch 501 on the smoke ignition device 5 and triggers the push switch 501 to operate, so that the smoke ignition device 5 ignites the smoke, and the burnt gas after the smoke is ignited is discharged from the top of the combustion box 3;

[0081] 2) When the instantaneous pressure of the smoke is released and the pressure of the smoke discharged from the smoke outlet becomes smaller, the trigger block 6 returns to its initial state under the action of the elastic reset member.

[0082] The method of the present invention can effectively prevent the accumulation of combustible gas in the lithium battery or PACK box 1, resulting in the risk of explosion and fire in the lithium battery or PACK box 1; at the same time, the combustible gas in the flue gas in the combustion box 3 is burned out and then discharged into the atmosphere, preventing pollution to the atmosphere.

[0083] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment and is not intended to limit the present invention. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be deemed to belong to the scope of patent protection of the present invention as determined by the submitted claims.

Claims

1. A device for treating battery thermal runaway flue gas, characterized in that: The battery thermal runaway smoke processing device is arranged at the smoke outlet end of the lithium battery or the PACK box.

2. The battery thermal runaway smoke treatment device according to claim 1, characterized in that: The battery thermal runaway smoke processing device comprises a smoke ignition device, and the smoke ignition device is used to ignite the smoke discharged by the thermal runaway of the lithium battery or the PACK box.

3. The battery thermal runaway smoke treatment device according to claim 2, characterized in that: The smoke ignition device is a pulse igniter or a piezoelectric igniter.

4. The battery thermal runaway smoke treatment device according to claim 3, characterized in that: The battery thermal runaway smoke processing device also includes a trigger device, which triggers the smoke ignition device to ignite through the smoke pressure discharged from the smoke outlet end of the lithium battery or the PACK box.

5. The battery thermal runaway smoke treatment device according to claim 4, characterized in that: The smoke ignition device and the trigger device are both arranged in the combustion chamber outside the smoke outlet end of the lithium battery or PACK box, the trigger device is arranged opposite to the smoke outlet end, and the smoke ignition device is arranged above the trigger device.

6. The battery thermal runaway smoke treatment device according to claim 5, characterized in that: The combustion cavity is the inner cavity of the combustion box, and the combustion box is fixedly connected to the lithium battery or the PACK box.

7. The battery thermal runaway smoke treatment device according to claim 6, characterized in that: The trigger device comprises a pressure plug, which is arranged at the smoke outlet end of the lithium battery or the PACK box.

8. The battery thermal runaway smoke treatment device according to claim 6, characterized in that: The trigger device includes a longitudinal sliding rod and a trigger block, both of which are placed in the inner cavity of the combustion box, and the longitudinal sliding rod is fixedly connected to the lithium battery or the PACK box; the trigger block is sleeved on the outer side of the longitudinal sliding rod and is slidably connected to the longitudinal sliding rod; the trigger block is arranged opposite to the smoke outlet end of the lithium battery or the PACK box, and the smoke ignition device is arranged above the trigger block.

9. The battery thermal runaway smoke treatment device according to claim 8, characterized in that: A push switch is arranged at the bottom of the smoke ignition device, and the push switch is arranged opposite to the pressure plug. A pressure relief component is arranged at the smoke outlet end, and the pressure relief component penetrates the flame retardant heat insulation board and extends into the combustion cavity of the combustion box; the top of the combustion box is open.

10. A method for treating battery thermal runaway flue gas, characterized in that: The steps are as follows: the smoke generated by the thermal runaway of the battery is ignited before being discharged into the atmosphere.

11. The method for treating battery thermal runaway smoke according to claim 10, characterized in that: The steps are specifically as follows: under the action of the exhaust smoke pressure in the lithium battery or PACK box, the trigger device is pushed toward the smoke ignition device until the trigger device triggers the smoke ignition device to ignite the smoke.

12. The method for treating battery thermal runaway smoke according to claim 11, characterized in that: The steps are specifically as follows: under the action of the exhaust smoke pressure in the lithium battery or the PACK box, the pressure plug is pushed out of the smoke outlet end, and the pressure plug is moved close to the push switch on the smoke ignition device until the pressure plug turns on the push switch, so that the smoke ignition device ignites the smoke; Or the specific steps are: under the action of the exhaust smoke pressure in the lithium battery or PACK box, the trigger block is pushed toward the smoke ignition device until the top block on the trigger block triggers the press switch on the smoke ignition device to turn on, so that the smoke ignition device ignites the smoke; When the smoke pressure discharged from the smoke outlet becomes smaller, the trigger block returns to its initial state under the action of the elastic reset member.

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