Battery thermal runaway exhaust gas treatment device, treatment method, battery group, and battery pack

Abstract

In this application, in order to solve the problems that the conventional methods for treating exhaust gas from battery thermal runaway are insufficient, have hidden safety hazards, and cause environmental pollution, a battery thermal runaway exhaust gas treatment device, treatment method, battery group, and battery pack are proposed. The device according to this application mainly ignites and burns the thermal runaway exhaust gas caused by the thermal runaway of the battery to treat the combustible components in the thermal runaway exhaust gas, so that the gas after combustion cannot be re-burned, and the fundamental safety objective is achieved while avoiding environmental pollution.

Description

Technical Field

[0001] This application belongs to the field of batteries, and specifically relates to a device for treating battery thermal runaway exhaust gas, a treatment method, a battery group, and a battery pack.

Background Art

[0002] In recent years, with the further development of the energy storage field of lithium-ion batteries, the safe use of lithium-ion batteries has also attracted attention. Due to the principles and structural characteristics of lithium-ion batteries, a large amount of heat is often generated due to the heat generation of internal resistance during their repeated use. Moreover, the amount of heat gradually increases, and if the accumulated heat cannot be efficiently dissipated, the temperature will become even higher. When the temperature reaches the limit, the thermal balance of the battery is disrupted, causing a series of side reactions such as self-heating, generating a large amount of flammable gas, and the "thermal runaway" phenomenon appears, ultimately leading to the combustion inside the battery, and in severe cases, causing an explosion, posing a hidden danger to the personal safety of users.

[0003] Chinese Patent Document CN205964755U discloses an automatic fire extinguishing device for a battery box. Such a device is provided with a sensor, an automatic controller, a fire extinguishing agent container, a transport pipeline, and a pressure release valve. When the sensor senses that the temperature inside the battery box reaches the limit value, under the control of the automatic controller, the fire extinguisher in the fire extinguishing agent container enters the battery box through the transport pipeline to extinguish the open fire inside the battery box, and at the same time, extinguish the smoldering fire of the battery core; The above device can prevent the explosion phenomenon of the battery box, but cannot treat the thermal runaway exhaust gas, and there is a certain hidden danger in terms of safety.

[0004] Chinese patent application CN209730109U discloses an active battery thermal gas extraction device, which comprises a battery shell enclosing an internal core and an extraction mechanism for extracting thermal gas. The battery shell is sealed inside, and its inner wall is provided with a high-temperature resistant mica shielding plate. An exhaust pipe is attached to the outside of the battery shell, with one end of the exhaust pipe communicating with the inside of the battery shell and the other end connected to the extraction mechanism. A filtration mechanism, a cooling mechanism, and a first explosion-proof valve are arranged sequentially from front to back in the exhaust pipe, and a second explosion-proof valve is provided in the battery shell. In the above device, thermal runaway batteries are processed to be actively extracted, and the thermal gas is filtered and cooled by the filtration mechanism and cooling mechanism to effectively control the temperature and quality of the discharged gas. However, even with such a device, thermal runaway exhaust gas cannot be fundamentally treated, and the discharged thermal runaway exhaust gas causes some degree of pollution to the environment.

[0005] Chinese patent application CN108417757A discloses a safe lithium battery and a method for manufacturing the same. Such a lithium battery comprises a core and a safety explosion-proof device, the safety explosion-proof device being a material bag, and a gas adsorbent provided inside the material bag. The gas adsorbent is activated carbon, a molecular sieve, or a mixture of activated carbon and a molecular sieve, and this mixture can directly adsorb high-temperature substances ejected from the battery. However, when using adsorbents such as activated carbon and molecular sieves for adsorption, the higher the temperature of the adsorbent, the worse the adsorption effect. For example, the adsorption temperature of activated carbon for gaseous substances is 50°C or lower, while the temperature of gas ejected during thermal runaway of a battery is generally higher than 300°C. At this temperature, the adsorption capacity of activated carbon to gaseous substances is lost, and conversely, it has the function of deadsorbing substances that have been adsorbed onto it. Furthermore, while adsorbent materials can absorb the vaporized electrolyte at this temperature, they cannot adsorb flammable gases such as hydrogen gas, carbon monoxide, and methane generated during thermal runaway of the battery. As a result, the risk of explosion due to these flammable gases still exists.

[0006] As is clear from the above explanation, conventional technology primarily deals with runaway thermal exhaust gases in the following three ways: firstly, to prevent the occurrence of runaway thermal gases by extinguishing them inside the battery; secondly, to collect runaway thermal exhaust gases intensively or to isolate them from air / oxygen gas with an inert gas; and thirdly, to discharge flammable gases caused by runaway thermal gases generated inside the battery box to the outside of the battery box. However, the above methods are insufficient in treating runaway thermal exhaust gases and do not fundamentally solve the problem. Explosions and secondary combustion due to runaway thermal exhaust gases remain likely, and there is a certain hidden danger in terms of safety. Furthermore, the discharged runaway thermal exhaust gases can also pollute the environment. [Overview of the Initiative]

[0007] This invention proposes a treatment device, treatment method, battery group, and battery pack for thermal runaway exhaust gases from batteries, in order to solve the problems that conventional methods for treating thermal runaway exhaust gases from batteries are insufficient, pose hidden safety hazards, and cause environmental pollution. This invention primarily involves igniting and burning the thermal runaway exhaust gases caused by thermal runaway of batteries to treat the flammable components in the exhaust gases. As a result, re-combustion of the gases after combustion is prevented, fundamentally achieving safety objectives while avoiding environmental pollution.

[0008] To address the above issues, the following technical solution is proposed in this application.

[0009] A battery thermal runaway exhaust gas treatment device, comprising an exhaust gas combustion device installed at the exhaust gas outlet end of a lithium battery or PACK box for burning the thermal runaway exhaust gas discharged due to thermal runaway of the lithium battery or PACK box.

[0010] Furthermore, the exhaust gas combustion device includes a pulse igniter.

[0011] Furthermore, it is further equipped with a trigger device for triggering ignition by the exhaust gas combustion device based on the pressure of the thermally runaway exhaust gas discharged from the exhaust gas outlet end of the lithium battery or PACK box.

[0012] Furthermore, both the exhaust gas combustion device and the trigger device are located in a combustion chamber outside the exhaust gas outlet end of the lithium battery or PACK box, the trigger device is positioned opposite the exhaust gas outlet end, the exhaust gas combustion device is positioned above the trigger device, the combustion chamber is the inner chamber of the combustion box, and the combustion box is fixedly connected to the lithium battery or PACK box.

[0013] Furthermore, the trigger device includes a lithium battery or a pressure plug provided at the exhaust gas outlet end of the PACK box.

[0014] Furthermore, the trigger device comprises a vertical sliding rod and a trigger block, both of which are located inside the combustion box, the vertical sliding rod being fixedly connected to a lithium battery or PACK box, the trigger block being mounted around the outer circumference of the vertical sliding rod and slidably connected to the vertical sliding rod, the trigger block being positioned opposite the exhaust gas outlet end of the lithium battery or PACK box, and the exhaust gas combustion device being located above the trigger block.

[0015] Furthermore, the lower end surface of the trigger block is an inwardly recessed arc shape, and the arc shape is positioned to face the exhaust gas outlet end of the lithium battery or PACK box. The trigger block is made of fire-resistant material, and an arc shape groove is provided at its bottom, and the arc shape groove is positioned to face the exhaust gas outlet end of the lithium battery or PACK box.

[0016] Furthermore, the trigger device further comprises a limiting block fixedly connected to the uppermost part of the vertical sliding rod, and an elastic return member, the limiting block being connected to the trigger block via the elastic return member and fixedly connected to the exhaust gas combustion device via a mounting frame.

[0017] Furthermore, a push switch is provided at the bottom of the exhaust gas combustion device, and the push switch is positioned opposite the trigger block. A push-up block is provided at the top of the trigger block, and the push-up block is positioned opposite the push switch.

[0018] Furthermore, the combustion box and vertical sliding rod are both fixedly connected to the lithium battery or PACK box via the flame-retardant insulation plate, and the flame-retardant insulation plate has a communication hole, through which the combustion box communicates with the exhaust gas outlet end, and a pressure release module is provided at the exhaust gas outlet end that penetrates the flame-retardant insulation plate and extends into the combustion chamber of the combustion box, and the top of the combustion box is open.

[0019] Furthermore, the exhaust gas combustion device comprises an exhaust pipe, several exhaust nozzles, a pressure valve, an ignition switch, and an ignition device, each of the several exhaust nozzles being fixedly connected to the exhaust pipe to form an exhaust passage for runaway thermal exhaust gas, the pressure valve and the ignition switch being provided within the exhaust passage, the pressure valve having a piston, the exhaust passage being sealed by the pressure valve at normal pressure and maintained in a closed state, the piston inside the pressure valve being pushed and moved by air pressure, the exhaust passage being opened, and at the same time the pressure valve coming into contact with the ignition switch and activating the ignition device, when runaway thermal exhaust gas is generated in the battery, as the air pressure gradually increases, the several pistons inside the pressure valve are pushed sequentially, the ignition switches are turned on sequentially, the ignition device is activated and the runaway thermal exhaust gas is combusted.

[0020] Furthermore, a flashback prevention valve is provided inside the exhaust pipe, and a sealing gasket is provided in the pressure valve.

[0021] Furthermore, since the exhaust pipe and the exhaust nozzle are fixed to a fixed cylinder, forming a gas passage, the runaway thermal exhaust gas passes through the exhaust pipe, the fixed cylinder, and the exhaust nozzle in that order.

[0022] Furthermore, the pressure valve is fixedly installed within the connection point with the exhaust nozzle of the fixed cylinder, the pressure valve is provided with a projection, the ignition switch is provided inside the exhaust nozzle, and when the piston of the pressure valve moves and the projection comes into contact with the ignition switch, the ignition device is activated.

[0023] Furthermore, the ignition device is a pulse igniter.

[0024] Furthermore, the exhaust gas combustion device comprises a first exhaust pipe, a second exhaust pipe, an ignition device, and a magnetic switch, wherein N units of the second exhaust pipe, magnetic switch, and ignition device are provided, where N is an integer of 1 or more, the inlets of the N second exhaust pipes are all connected to the outlets of the first exhaust pipes, the N ignition devices are provided at the outlets of the second exhaust pipes for burning the runaway exhaust gas discharged from the second exhaust pipes, and the N magnetic switches are provided in a one-to-one correspondence with the N second exhaust pipes for activating the ignition devices by transmitting an electrical signal to the ignition devices when the runaway exhaust gas passes through the second exhaust pipes, thereby burning the runaway exhaust gas.

[0025] Furthermore, the magnetic switch is one of the following: a mechanical magnetic switch, a gravity-type magnetic switch, or a magnetic-type magnetic switch, and the magnetic switch is a normally closed switch.

[0026] Furthermore, it is equipped with N exhaust nozzles, each having a tapered pipe structure, with the large ends of the N exhaust nozzles connected in a one-to-one correspondence to the outlets of N second exhaust pipes, and N ignition devices provided in a one-to-one correspondence to the small end outlets of the N exhaust nozzles.

[0027] Furthermore, a backfire prevention valve for preventing the backflow of the thermal runaway exhaust gas is provided in the first exhaust pipe. The backfire prevention valve is a one-way valve. The ignition device is a pulse igniter. The pulse igniter has an ignition head provided in the second exhaust pipe via a holder, a battery or an AC power interface provided in a power box, and a signal wire hermetically connected to the power box via a waterproof connector.

[0028] Furthermore, the exhaust gas combustion device includes a combustion chamber, an ignition device, and a trigger device. The ignition device is disposed inside the combustion chamber. The combustion chamber is for storing the thermal runaway exhaust gas generated during the thermal runaway of the battery. The trigger device is connected to the ignition device and triggers the ignition device based on the pressure and / or temperature of the thermal runaway exhaust gas to burn the thermal runaway exhaust gas.

[0029] Furthermore, the trigger device is a pressure switch and / or a temperature control switch, or an electric contact pressure gauge.

[0030] Furthermore, it further includes a thermal runaway exhaust gas discharge pipe. The combustion chamber is connected to the electrolyte chamber of the battery via the thermal runaway exhaust gas discharge pipe. An explosion-proof device is provided inside the thermal runaway exhaust gas discharge pipe. When the trigger device is a pressure switch and / or a temperature control switch, the pressure switch and / or the temperature control switch are provided between the explosion-proof device and the combustion chamber, and the pressure switch and the temperature control switch are connected in parallel or in series. When the trigger device is an electric contact pressure gauge, the electric contact pressure gauge is provided between the electrolyte chamber of the battery and the combustion chamber, and the contact pressure of the electric contact pressure gauge is smaller than the explosion-proof pressure of the explosion-proof device.

[0031] Furthermore, the ignition device includes an igniter disposed inside the combustion chamber and a power source provided inside or outside the combustion chamber. The power source is electrically connected to the igniter and the trigger device, and the trigger device is electrically connected to the igniter.

[0032] Furthermore, the combustion chamber is further equipped with a flashback prevention device installed between the thermal runaway exhaust gas discharge pipe and the combustion chamber, and a windproof cover installed at the top of the combustion chamber, and the chamber wall of the combustion chamber is provided with an air intake for supplying combustion-supporting gas to the combustion chamber and an air vent for releasing gas remaining after combustion.

[0033] Furthermore, the exhaust gas combustion device comprises an igniter, a trigger device, and exhaust gas piping, to The rigging device comprises a control circuit board and a sensor, the sensor being installed in the exhaust gas piping or battery shell, its output terminal connected to the control circuit board, and configured to output a signal to the control circuit board when the battery overheats, after which the control circuit board outputs an ignition current in response to the signal, and the igniter being an arc igniter or a resistance wire igniter, installed in the exhaust gas piping, and capable of burning the overheated exhaust gas discharged from the exhaust gas piping by the ignition current output from the control circuit board.

[0034] Furthermore, the resistance wire igniter comprises an igniter shell and a resistance wire, the igniter shell having an ignition chamber that communicates with the exhaust gas piping, the resistance wire being located inside the ignition chamber, and in addition, both ends of the resistance wire being connected to a control circuit board located outside the igniter shell.

[0035] Furthermore, the arc igniter comprises an igniter shell, a first electrode wire, and a second electrode wire. The igniter shell contains an ignition chamber that communicates with an exhaust gas pipe. One end of the first electrode wire and one end of the second electrode wire are located inside the ignition chamber, with an ionization gap between them. The other ends of the first and second electrode wires are located outside the igniter shell and connected to a control circuit board.

[0036] Furthermore, the arc igniter and resistance wire igniter further comprise a ceramic retaining ring and a ceramic retaining ring, wherein a ring groove is provided within the ceramic retaining ring, and the resistance wire, first electrode wire, or second electrode wire is provided within the ring groove and firmly pressed by the ceramic retaining ring.

[0037] Furthermore, the control circuit board is provided with an oscillation circuit for converting DC power to AC power, and a boost coil is provided between the arc igniter and the control circuit board for boosting the AC power output from the control circuit board and transporting it to the first electrode wire and the second electrode wire.

[0038] Furthermore, the trigger device includes at least one selected from a pressure sensor, a gas sensor, or a temperature sensor.

[0039] Furthermore, the system further comprises a cooling and adsorption unit, the cooling and adsorption unit including N cans connected sequentially in series, the N cans filled with a coolant and / or adsorbent for cooling and / or adsorbing runaway battery exhaust gas, where N is an integer of 1 or more, and the exhaust gas combustion device is provided at the outlet end of the Nth can for burning the runaway battery exhaust gas after cooling and / or adsorption has finished.

[0040] Furthermore, the N cans are arranged in a linear line or in a linear U-shape, V-shape, or L-shape, and each can is provided with X porous plates, and a cooling and adsorption chamber is formed by two adjacent porous plates and the inner wall of the can, and the coolant and / or adsorbent is filled in part or all of the cooling and adsorption chamber, where X is an integer of 2 or more, and adjacent porous plates are connected axially by connecting rods.

[0041] Furthermore, adjacent boilers are connected in series by elbows or hoses, and a backflow buffer chamber is formed in the elbow for the battery thermal runaway exhaust gas to pass through. A flashback prevention unit is fixed to the Nth boiler, and a collection unit is provided between the Nth boiler and the exhaust gas combustion device. The exhaust gas combustion device includes a pulse igniter and further comprises an air intake for introducing air and mixing it with the thermal runaway exhaust gas for combustion.

[0042] Furthermore, the exhaust gas combustion device is further equipped with a gas storage tank, the gas storage tank having a partition plate for dividing the gas storage tank into a closed first partition chamber and a second partition chamber, the first partition chamber having an air supply pipe for allowing runaway thermal exhaust gas to enter the first partition chamber, the second partition chamber having an exhaust pipe for discharging runaway thermal exhaust gas, the exhaust gas combustion device is equipped with an ignition device, a trigger device and an ignition switch, the ignition device is provided at the outlet of the exhaust pipe, a pressure release valve is provided on the partition plate so that runaway thermal exhaust gas enters the second partition chamber from the first partition chamber via the pressure release valve, and the trigger device and ignition switch are located in the gas storage tank A trigger device is provided in the partition plate and is movable by air pressure, and the ignition switch is provided in the second partition chamber and can be activated by the trigger device, and when the air pressure in the first partition chamber rises to a first threshold P1, the runaway exhaust gas enters the second partition chamber via the pressure release valve and further reaches the outlet via the exhaust pipe, on the other hand when the air pressure in the first partition chamber reaches a second threshold P2, the trigger device comes into contact with the ignition switch, the ignition switch activates the ignition device and burns the runaway exhaust gas, and the value of the first threshold P1 is equal to or greater than the value of the second threshold P2.

[0043] Furthermore, the partition plate is provided with a sealing gasket to maintain the airtightness of the first and second partition chambers, the outlet of the exhaust pipe is provided with a flow check valve to control the flow rate of runaway exhaust gas, and the ignition device is a pulse igniter.

[0044] Furthermore, the exhaust pipe is provided with at least two exhaust nozzles, the ignition device includes at least two ignition heads, and a support base for mounting the ignition device is provided outside the gas storage tank.

[0045] Furthermore, the system further comprises a gas storage tank, the gas storage tank having an air intake port and an exhaust port for inputting and outputting runaway thermal exhaust gas, the exhaust gas combustion device being fixed to the exhaust port located outside the gas storage tank, the gas storage tank being partitioned into an independent first partition chamber and a second partition chamber by a movable partition plate, the air intake port being provided in the first partition chamber, the exhaust port being provided in the second partition chamber, a switch module being provided in the second partition chamber, the switch module including an ignition switch, and when the air pressure in the first partition chamber rises, the movable partition plate is pushed by the air pressure in the first partition chamber and comes into contact with the ignition switch, the ignition device is activated, and at least a portion of the exhaust port is exposed to the first partition chamber to discharge the runaway thermal exhaust gas.

[0046] Furthermore, the first partition chamber and / or the second partition chamber are provided with an elastic module pressed between the first partition chamber and / or the second partition chamber and the movable partition plate, and the movable partition plate is provided with a sealing gasket to maintain the airtightness of the first partition chamber and the second partition chamber, and the exhaust mouth The system is configured as piping, and the piping is equipped with a flow check valve to control the flow rate of runaway exhaust gas, and the ignition device is a pulse igniter.

[0047] Furthermore, the gas storage tank hmmThe component is in the form of a cylindrical body, the movable partition plate is provided with a base and a projection, the projection can be inserted into the air intake port to maintain the closure of the air intake port under normal pressure, the base moves along the axial direction of the cylindrical body and there is a gap between it and the cylindrical body for the runaway thermal exhaust gas to pass through, the switch module is provided on the base, and when the runaway thermal exhaust gas passes through the air intake port, the pressure increases so that the projection is pushed up, the switch module comes into contact with it, the ignition device is activated and the runaway thermal exhaust gas is burned.

[0048] Furthermore, the exhaust gas combustion device further comprises an alarm module, an exhaust pipe, a trigger device, and an ignition device, wherein the trigger device is provided in the exhaust pipe and activates the ignition device when runaway exhaust gas passes through the exhaust pipe, the ignition device is provided at the outlet end of the exhaust pipe and burns the runaway exhaust gas inside the exhaust pipe, and the alarm module emits an alarm signal when the ignition device is activated.

[0049] Furthermore, the alarm module is installed in the exhaust gas combustion device and includes an audible alarm device and / or a light alarm device, wherein the audible alarm device is a buzzer and the light alarm device is a flashing light, and the flashing light is either a red flashing light or a yellow flashing light.

[0050] Furthermore, the exhaust pipe includes a first exhaust pipe and a second exhaust pipe, and N units of the second exhaust pipe, trigger devices, and ignition devices are provided, the inlets of the N second exhaust pipes are all connected to the outlets of the first exhaust pipe, the N ignition devices are provided at the outlets of the second exhaust pipes, and the N trigger devices are provided in one-to-one correspondence with the N second exhaust pipes, where N is an integer of 1 or more, and the exhaust pipe or the second exhaust pipe is provided with a top cover, the top cover is hinged to the exhaust pipe or the second exhaust pipe and can be opened when runaway thermal exhaust gas passes through, or the exhaust pipe or the second exhaust pipe is provided with a sealing plug, the sealing plug is provided at the outlet of the exhaust pipe or the second exhaust pipe and can be pushed up when runaway thermal exhaust gas passes through.

[0051] The present invention further proposes a battery group comprising an explosion-proof mechanism, a confluence pipe, an ignition device, and at least one single cell, wherein the explosion-proof mechanism is fixed to the single cell and is for releasing thermal runaway exhaust gas generated when the single cell experiences thermal runaway, the confluence pipe is fixedly connected to the explosion-proof mechanism and is for transporting the thermal runaway exhaust gas, the ignition device is fixedly connected to the confluence pipe and is for burning the thermal runaway exhaust gas transported from the confluence pipe, and the ignition device is a battery thermal runaway exhaust gas treatment device as described in any one of the above claims.

[0052] Furthermore, the system is further equipped with a buffer device located forward of the ignition device, the buffer device is provided with a pressure release valve, and a flashback prevention device is fixed to the confluence pipe. The buffer device is an elastic bag or a pressure vessel, and the ignition device is further equipped with an air intake port for introducing air and mixing it with runaway exhaust gas for combustion.

[0053] The present invention further proposes a battery pack comprising a box body, an explosion-proof mechanism, a confluence pipe, an ignition device, and several lithium-ion batteries arranged inside the box body, wherein the explosion-proof mechanism is fixed to the box body and is for releasing thermal runaway exhaust gas generated when the lithium-ion batteries experience thermal runaway, the confluence pipe is fixedly connected to the explosion-proof mechanism and is for transporting the thermal runaway exhaust gas, the ignition device is fixedly connected to the confluence pipe and is for burning the thermal runaway exhaust gas transported from the confluence pipe, and the ignition device is a battery thermal runaway exhaust gas treatment device as described in any one of the above paragraphs.

[0054] Furthermore, a flashback prevention device is fixed to the confluence pipe, the lithium-ion battery is equipped with a buffer device located in front of the ignition device, and the buffer device is equipped with a pressure release valve.

[0055] Furthermore, the ignition device is a pulse igniter, and the ignition device further includes an air intake port for introducing air and mixing it with runaway exhaust gas for combustion.

[0056] This application further proposes a method for treating exhaust gases from battery thermal runaway, which includes a step in which the exhaust gases from battery thermal runaway are combusted before being discharged into the atmosphere.

[0057] Furthermore, before the exhaust gases resulting from the thermal runaway of the battery were discharged into the atmosphere, they were subjected to combustion treatment using a battery thermal runaway exhaust gas treatment device as described in one of the above items.

[0058] Furthermore, regarding the step in which exhaust gases resulting from battery thermal runaway are burned before being discharged into the atmosphere, specifically, the trigger device approaches the exhaust gas combustion device until the exhaust gas combustion device is triggered by the pressure of the exhaust gases discharged from the lithium battery or PACK box and the exhaust gases are burned.

[0059] Furthermore, the process includes the following steps: The pressure plug is pushed up from the exhaust gas outlet end by the pressure of the exhaust gas discharged from the lithium battery or PACK box, and moves closer to the push switch of the exhaust gas combustion device until the push switch of the exhaust gas combustion device is turned on and the exhaust gas is burned in the exhaust gas combustion device; or, the process includes the following steps: The trigger block is pushed up by the pressure of the exhaust gas discharged from the lithium battery or PACK box, triggering the push switch of the exhaust gas combustion device to be turned on and the exhaust gas is burned in the exhaust gas combustion device, and when the pressure of the exhaust gas discharged from the exhaust gas outlet end decreases, the trigger block is returned to its initial state by the elastic return member.

[0060] Compared to conventional technologies, this invention can bring about the following beneficial effects.

[0061] 1. In this invention, an exhaust gas combustion device is provided at the exhaust gas outlet end of the lithium battery or PACK box. The exhaust gas discharged from the lithium battery or PACK box is burned by the exhaust gas combustion device, and after the flammable gas in the runaway thermal exhaust gas is burned out, it is discharged into the atmosphere. This effectively avoids the possibility of explosion or secondary combustion, while also preventing environmental pollution caused by the runaway thermal exhaust gas.

[0062] 2. In this invention, since the exhaust gas combustion device is located outside the exhaust gas outlet end of the lithium battery or PACK box, the runaway thermal exhaust gas discharged from the lithium battery or PACK box is easily combusted, and the runaway thermal exhaust gas can be suitably treated, thereby controlling the amount of flammable gas in the runaway thermal exhaust gas and preventing explosions; the exhaust gas combustion device is located inside the combustion chamber, and the exhaust gas discharged from the exhaust gas outlet end is collected in the combustion chamber, and the exhaust gas can be concentrated and burned by the combustion chamber. The trigger device is located opposite the exhaust gas outlet end and is pushed closer to the exhaust gas combustion device by the air pressure of the exhaust gas discharged from the exhaust gas outlet end, which then triggers the switch of the exhaust gas combustion device, causing the flammable components in the exhaust gas to burn, and the burned gas is discharged into the atmosphere, thus avoiding air pollution by flammable gases; in addition, the accumulation of flammable gases inside the lithium battery or PACK box, which could lead to dangerous incidents such as explosions and fires, is avoided.

[0063] 3. In this invention, the trigger device is equipped with a pressure plug, which is ejected from the exhaust gas outlet end by the instantaneous pressure of the exhaust gas and approaches the exhaust gas combustion device, thereby triggering the exhaust gas combustion device to burn the exhaust gas, and when the pressure plug is used, it is released when the exhaust gas pressure reaches a limit pressure value, making it easy to control the operation.

[0064] 4. In this invention, the trigger device comprises a vertical sliding rod and a trigger block, the trigger block being pushed by the air pressure of the exhaust gas discharged from the exhaust gas outlet end to slide along the axial direction of the vertical sliding rod and approach the switch of the exhaust gas combustion device, thereby triggering the switch of the exhaust gas combustion device and causing the exhaust gas to be burned in the exhaust gas combustion device. The trigger device further comprises a limiting block and an elastic return member, the elastic return member being fixedly connected to the uppermost part of the vertical sliding rod, and the limiting member preventing the trigger block from detaching from the vertical sliding rod when the air pressure is too high; the limiting block is connected to the trigger block via the elastic return member, and the elastic return member allows the trigger block to return to its original position after the switch of the exhaust gas combustion device has been triggered by the trigger block.

[0065] 5. In this invention, the lower end surface of the trigger block is made into an inwardly concave arc shape, and the arc shape increases the force-receiving area of ​​the trigger block; an arc groove is provided at the bottom of the trigger block, and the arc groove is positioned to face the exhaust gas outlet end; the arc groove can concentrate air pressure, thereby improving the pressure-induced pushing effect.

[0066] 6. In this application, the limiting block is fixedly connected to the exhaust gas combustion device via a mounting frame, and the position of the exhaust gas combustion device is fixed by the mounting frame, so that when the switch of the exhaust gas combustion device is triggered by the trigger block, the exhaust gas combustion device does not shake and affect the trigger effect; the mounting frame is fixedly connected to the exhaust gas combustion device via a locking device, and the mounting frame and the exhaust gas combustion device can be easily fixedly connected by the locking device.

[0067] 7. In this invention, a push-up block is provided at the top of the trigger block so as to be opposite to the push switch, and the push-up block allows the trigger operation to be performed more effectively and the trigger to the switch of the exhaust gas combustion device to be performed more conveniently.

[0068] 8. In this application, both the combustion box and the vertical sliding rod are fixedly connected to the lithium battery or PACK box via a flame-retardant heat-insulating plate. The flame-retardant heat-insulating plate provides fire prevention and heat insulation isolation between the lithium battery or PACK box and the trigger device of the exhaust gas combustion system, thereby preventing the heat generated by combustion from affecting the energy storage battery operating normally inside the lithium battery or PACK box.

[0069] 9. In this invention, the battery is equipped with a thermal runaway exhaust gas treatment device. When the battery experiences thermal runaway, the exhaust gas generated is released through an exhaust pipe and several exhaust nozzles. Several pressure valves and ignition switches are provided within the gas passage formed by the exhaust pipe and exhaust nozzles. When the pressure of the thermal runaway exhaust gas reaches a threshold, it passes through the exhaust nozzles sequentially and then contacts the ignition switches via the pressure valves, sequentially opening the ignition device and burning the thermal runaway exhaust gas. The device has a simple and compact structure, and when used to treat exhaust gas from battery thermal runaway, it is safe, environmentally friendly, economical, practical, and highly efficient. When used to treat battery thermal runaway exhaust gas, the device has a simple structure, is easy to install, is safe, environmentally friendly, and highly efficient.

[0070] 10. In this invention, the battery thermal runaway exhaust gas treatment device allows for the combustion of exhaust gas caused by thermal runaway, thereby avoiding air pollution caused by the discharged thermal runaway exhaust gas, and also preventing dangerous incidents such as explosions and fires that occur when thermal runaway exhaust gas accumulates inside the battery, thereby significantly improving the safety of the battery. The battery thermal runaway exhaust gas treatment device activates an ignition device using a magnetic switch. The magnetic switch outputs a signal using a permanent magnet and a sensing element to trigger the ignition device. The magnetic switch is highly sensitive and can detect and trigger the thermal runaway exhaust gas as soon as it passes through the second exhaust pipe, eliminating the need for high sensing pressure. The ignition device is triggered at the initial or start of passage of the thermal runaway exhaust gas, and the ignition device can further combust the thermal runaway exhaust gas at the initial or start of passage. As a result, leakage of thermal runaway exhaust gas from the second exhaust pipe at the initial or start of passage is avoided, preventing environmental pollution or safety accidents, thereby improving the safety of the battery to a certain extent.

[0071] 11. In this application, the battery thermal runaway exhaust gas treatment device comprises a combustion chamber, an ignition device, and a trigger device. The combustion chamber is for storing the thermal runaway exhaust gas and supporting gas generated during thermal runaway of the battery. The trigger device is for triggering the ignition device based on the pressure and / or temperature of the thermal runaway exhaust gas to burn the thermal runaway exhaust gas. By burning the thermal runaway exhaust gas in the combustion chamber with the ignition device, the concentration of flammable components in the thermal runaway exhaust gas is reduced or reduced to zero, thereby ensuring that the gas after combustion does not undergo secondary combustion, fundamentally achieving the purpose of fire prevention. At the same time, the accumulation of thermal runaway exhaust gas inside the battery is also avoided, preventing the battery from exploding and ensuring the safety of the battery's operation.

[0072] 12. In this invention, the battery thermal runaway exhaust gas treatment device further comprises a thermal runaway exhaust gas discharge pipe, and an explosion-proof device is provided inside the thermal runaway exhaust gas discharge pipe. When thermal runaway occurs inside the battery and high temperature and high pressure are generated, the explosion-proof device is opened by the high temperature and / or high pressure, and the flammable gas produced by the thermal runaway of the battery is introduced into the combustion chamber by the thermal runaway exhaust gas discharge pipe and combusted.

[0073] 13. In this application, the igniter of the treatment device for runaway battery exhaust gas is an arc igniter or a resistance wire igniter. Since arc igniters and resistance wire igniters are continuous ignition devices, the influence of wind and rain in the external environment on the performance of the igniter is avoided, and furthermore, the risk of runaway thermal exhaust gas not being able to burn in a timely manner is avoided.

[0074] 14. In the battery thermal runaway exhaust gas treatment device according to the present invention, the temperature and flow rate of the exhaust gas are reduced as the battery thermal runaway exhaust gas passes through the cooling and adsorption chamber, thereby improving the purification effect. At the same time, the lifespan of the ignition device located behind the battery thermal runaway exhaust gas, which has been cooled and adsorbed in front of it, is increased.

[0075] 15. In the battery thermal runaway exhaust gas treatment device according to the present invention, the N cans are arranged according to the requirements of the mounting space and may be arranged in various forms such as a single row, U-shape, V-shape, or L-shape, thereby satisfying various mounting requirements and saving space. Furthermore, the N cans can be assembled with elbows, making installation and removal convenient. The device can be applied to most existing single batteries and assembled batteries, and does not require modification of the structure of existing batteries, resulting in low processing costs and a wide range of applications.

[0076] 16. In the battery thermal runaway exhaust gas treatment device according to the present invention, the collection unit collects flammable components in the exhaust gas, and when the gas volume reaches a threshold, it is burned at the outlet end. On the other hand, if the threshold is not reached, the exhaust gas combustion device is not activated. As a result, the number of collection units is increased as a defensive line in front of the exhaust gas combustion device, thereby improving safety.

[0077] 17. In the thermal runaway exhaust gas treatment device according to the present invention, a gas storage tank and a partition plate are arranged, and the partition plate divides the gas storage tank into a closed first partition chamber and a second partition chamber, and an exhaust port and an ignition device are arranged in the second partition chamber, and when the air pressure in the first partition chamber increases and a movable trigger device on the partition plate comes into contact with the ignition switch, the ignition device is activated and the gas in the first partition chamber is discharged through a pressure release valve on the partition plate and combusted. When exhaust gas caused by thermal runaway of a battery is treated with this device, it is safe, environmentally friendly, economical, practical, highly efficient, simple in structure, easy to assemble, and inexpensive.

[0078] 18. In this invention, a battery thermal runaway exhaust gas treatment device is placed in the battery shell, so that the thermal runaway exhaust gas generated during battery thermal runaway is released into the gas storage tank, a movable partition plate is moved by the air pressure in the first partition chamber, and further touches an ignition switch in the second partition chamber, exposing the exhaust port to the first partition chamber, and the thermal runaway exhaust gas that has reached a predetermined concentration is discharged through the exhaust port and then combusted. The structure of the device is simple and compact, and when the battery thermal runaway exhaust gas is treated with this device, it is safe, environmentally friendly, economical, practical, and highly efficient.

[0079] 19. The battery thermal runaway exhaust gas treatment device according to the present invention comprises an exhaust gas combustion device and an alarm module; the device allows for the combustion of exhaust gas due to thermal runaway, avoiding air pollution caused by the emitted thermal runaway exhaust gas, while also preventing dangerous incidents such as explosions and fires caused by the accumulation of thermal runaway exhaust gas inside the battery, thereby significantly improving battery safety. At the same time, the battery thermal runaway exhaust gas treatment device is equipped with an alarm module, which emits an alarm signal when the ignition device is activated, providing a warning so that operators can deal with thermal runaway batteries in a timely manner, and simultaneously allowing for the accurate positioning of thermal runaway batteries, enabling operators to deal with them accurately and in a timely manner.

[0080] 20. In this invention, the batteries in the battery group and battery pack are equipped with explosion-proof mechanisms and confluence pipes. When the batteries experience thermal runaway, the thermal runaway exhaust gas generated is released in a specific direction, discharged through the confluence pipe, and further equipped with an ignition device to burn the thermal runaway exhaust gas. This treatment method eliminates the risk of fire because there is no place to discharge the thermal runaway exhaust gas generated when the batteries experience thermal runaway. Compared to conventional technology, its structure is simpler, safer, more environmentally friendly, and more efficient. [Brief explanation of the drawing]

[0081] [Figure 1] This is a schematic diagram showing the configuration of a battery thermal runaway exhaust gas treatment device according to Embodiment 1 of the present application. [Figure 2]This is a schematic diagram showing the connection between the trigger device according to Embodiment 1 of the present application and a lithium battery or PACK box. [Figure 3] Figure 1 is a schematic diagram showing the configuration of the trigger device according to Embodiment 3 of the present application. [Figure 4] This is a schematic diagram of a partially enlarged section A in Figure 3. [Figure 5] Figure 2 is a schematic diagram showing the configuration of the trigger device according to Embodiment 3 of the present application. [Figure 6] Figure 1 is a schematic diagram showing the configuration of the thermal runaway exhaust gas treatment device according to Embodiment 8 of the present application. [Figure 7] Figure 2 is a schematic diagram showing the configuration of the thermal runaway exhaust gas treatment device according to Embodiment 8 of the present application. [Figure 8] Figure 3 is a schematic diagram showing the configuration of the thermal runaway exhaust gas treatment device according to Embodiment 8 of the present application. [Figure 9] This is a schematic diagram showing the configuration of the battery shell according to Embodiment 9 of the present application. [Figure 10] This is a schematic diagram showing the cross-sectional structure of the battery shell according to Embodiment 9 of the present application. [Figure 11] This is a schematic diagram showing the configuration of a battery thermal runaway exhaust gas treatment device according to Embodiment 10 of the present application. [Figure 12] Figure 1 is a schematic diagram showing the configuration of a magnetic switch according to Embodiment 10 of the present invention. [Figure 13] Figure 2 is a schematic diagram showing the configuration of the magnetic switch according to Embodiment 10 of the present invention. [Figure 14] This is a schematic diagram showing the configuration of an exhaust gas combustion device according to Embodiment 12 of the present application. [Figure 15] This is a schematic diagram showing the configuration of an exhaust gas combustion device according to Embodiment 13 of the present application. [Figure 16] This is a schematic diagram showing the configuration of an exhaust gas combustion device according to Embodiment 14 of the present application. [Figure 17] This is a schematic diagram showing the configuration of an exhaust gas combustion device according to Embodiment 15 of the present application. [Figure 18] This is a schematic diagram 1 showing the configuration of a battery thermal runaway exhaust gas treatment device according to Embodiment 16 of the present invention. [Figure 19]This is a cross-sectional view of an arc igniter according to Embodiment 16 of the present application. [Figure 20] This is a plan view of the arc igniter according to Embodiment 16 of the present application. [Figure 21] Figure 2 is a schematic diagram showing the configuration of a battery thermal runaway exhaust gas treatment device according to Embodiment 16 of the present invention. [Figure 22] This is a cross-sectional view of a resistance wire igniter according to Embodiment 16 of the present application. [Figure 23] This is a plan view of the resistance wire igniter according to Embodiment 16 of the present application. [Figure 24] This is a schematic diagram showing the configuration of the exhaust gas piping according to Embodiment 16 of the present invention. [Figure 25] This is a schematic diagram 1 showing the configuration of the battery group according to Embodiment 16 of the present invention. [Figure 26] This is a schematic diagram 2 showing the configuration of the battery group according to Embodiment 16 of the present invention. [Figure 27] Figure 1 is a schematic diagram showing the configuration of a battery thermal runaway exhaust gas treatment device according to Embodiment 17 of the present application. [Figure 28] Figure 2 is a schematic diagram showing the configuration of a battery thermal runaway exhaust gas treatment device according to Embodiment 17 of the present application. [Figure 29] Figure 3 is a schematic diagram showing the configuration of a battery thermal runaway exhaust gas treatment device according to Embodiment 17 of the present application. [Figure 30] Figure 4 is a schematic diagram showing the configuration of a battery thermal runaway exhaust gas treatment device according to Embodiment 17 of the present invention. [Figure 31] This is a schematic diagram showing the configuration of a thermal runaway exhaust gas treatment device according to Embodiment 18 of the present application. [Figure 32] This is a schematic diagram showing the configuration of a thermal runaway exhaust gas treatment device according to Embodiment 18 of the present application. [Figure 33] This is a schematic diagram showing the configuration of the battery shell according to Embodiment 19 of the present application. [Figure 34] Figure 1 is a schematic diagram showing the configuration of the thermal runaway exhaust gas treatment device according to Example 20 of the present application. [Figure 35] Figure 2 is a schematic diagram showing the configuration of the thermal runaway exhaust gas treatment device according to Example 20 of the present application. [Figure 36] A schematic diagram showing the configuration of the battery shell according to Embodiment 21 of the present invention. [Figure 37] Figure 1 is a schematic diagram showing the configuration of the thermal runaway exhaust gas treatment device according to Example 22 of the present invention. [Figure 38] Figure 2 is a schematic diagram showing the configuration of the thermal runaway exhaust gas treatment device according to Example 22 of the present application. [Figure 39] Figure 3 is a schematic diagram showing the configuration of the thermal runaway exhaust gas treatment device according to Example 22 of the present application. [Figure 40] This is a schematic diagram showing the configuration of a battery shell according to Embodiment 22 of the present invention. [Figure 41] Figure 1 is a schematic diagram showing the configuration of a battery thermal runaway exhaust gas treatment device according to Embodiment 23 of the present application. [Figure 42] This is a schematic diagram 2 showing the configuration of a battery thermal runaway exhaust gas treatment device according to Embodiment 23 of the present application. [Figure 43] Figure 3 is a schematic diagram showing the configuration of a battery thermal runaway exhaust gas treatment device according to Embodiment 23 of the present invention. [Figure 44] This is a schematic diagram showing a lithium-ion battery group according to Example 24 of the present application. [Figure 45] This is a schematic diagram showing a pulse igniter for a lithium-ion battery group according to Embodiment 24 of the present application. [Figure 46] This is a schematic diagram showing a lithium-ion battery group according to Example 25 of the present application. [Figure 47] This is a schematic diagram showing a lithium-ion battery group according to Example 26 of the present application. [Figure 48] This is a schematic diagram showing a battery pack according to Embodiment 27 of the present application. [Figure 49] This is a schematic diagram showing a battery pack according to Embodiment 28 of the present application. [Figure 50] This is a schematic diagram showing a battery pack according to Embodiment 29 of the present application. [Modes for carrying out the invention]

[0082] The technical proposal of this application will be further described below with reference to the drawings and embodiments, but this application is not limited to the embodiments described below.

[0083] This application primarily proposes a treatment device, treatment method, battery group, and battery pack for battery thermal runaway exhaust gas. The treatment device for battery thermal runaway exhaust gas includes an exhaust gas combustion device. In this application, the structure of the exhaust gas combustion device is not particularly limited, as long as it burns the thermal runaway exhaust gas caused by the thermal runaway of the battery and does not cause re-combustion of the gas after combustion. Below, various exhaust gas combustion devices with different structures proposed in this application will be described in detail and given examples.

[0084] Example 1 As shown in Figures 1 to 4, the battery thermal runaway exhaust gas treatment device according to this embodiment includes an exhaust gas combustion device 15 provided at the exhaust gas outlet end of the lithium battery or PACK box 11 for burning the exhaust gas discharged when the lithium battery or PACK box 11 undergoes thermal runaway. Here, the lithium battery is a single cell, and the PACK box is a large-capacity battery formed by connecting multiple lithium batteries in series and parallel. The exhaust gas combustion device 15 according to this embodiment may be a piezoelectric igniter or a pulse igniter. Preferably, the exhaust gas combustion device 15 is a pulse igniter.

[0085] The battery thermal runaway exhaust gas treatment device according to this embodiment is equipped with a trigger device for triggering ignition by the exhaust gas combustion device 15 based on the pressure of the exhaust gas discharged from the exhaust gas outlet end of the lithium battery or PACK box 11. Both the exhaust gas combustion device 15 and the trigger device are located in a combustion chamber outside the exhaust gas outlet end of the lithium battery or PACK box 11, the trigger device is positioned opposite the exhaust gas outlet end, and the exhaust gas combustion device 15 is positioned above the trigger device.

[0086] In this embodiment, the combustion chamber is the inner chamber of the combustion box 13, the inner chamber of the combustion bag, or an inner chamber formed by another container. Preferably, the combustion chamber is the inner chamber of the combustion box 13, and the combustion box 13 is fixedly connected to the uppermost end face of the lithium battery or PACK box 11. Preferably, the combustion box 13 is made of a metal material or a high-temperature resistant plastic material.

[0087] In this embodiment, a pressure release module is provided at the exhaust gas outlet end, which penetrates the flame-retardant heat insulating plate 131 and extends into the combustion chamber of the combustion box 13. The pressure release module may be a pressure release valve 12 or an explosion-proof film. Preferably, the pressure release module in this embodiment is a pressure release valve 12. The combustion box 13 is a cylindrical structure with both its top and bottom open, and may be a cylindrical structure, a columnar cylindrical structure, a tapered cylindrical structure, or a cylindrical structure of other shapes. Preferably, the combustion box 13 in this embodiment is a cylindrical structure, and its top opening allows for timely discharge of burnt-out gas, preventing the risk of explosion due to excessive pressure caused by gas accumulation inside the combustion box 13.

[0088] Example 2 In addition to the features of the battery thermal runaway exhaust gas treatment device in this embodiment, the trigger device is a pressure plug. By pressing the pressure plug against the exhaust gas outlet end of the lithium battery or PACK box 11, the inner chamber of the lithium battery or PACK box 11 is sealed. When exhaust gas is discharged from the inner chamber of the lithium battery or PACK box 11, the pressure of the exhaust gas pushes the pressure plug upward, and the pushed-up pressure plug triggers the exhaust gas combustion device 15 to burn the exhaust gas.

[0089] Example 3 As shown in Figures 3 to 5, in the battery thermal runaway exhaust gas treatment device according to this embodiment, in addition to the first embodiment, the trigger device includes a vertical sliding rod 14 and a trigger block 16, both of which are provided in the combustion chamber of the combustion box 13, and the bottom end of the vertical sliding rod 14 is fixedly connected to the uppermost end face of the lithium battery or PACK box 11; the trigger block 16 is provided around the outer circumference of the vertical sliding rod 14 and is slidably connected to the vertical sliding rod 14; the trigger block 16 has a through hole 163 that penetrates vertically, the vertical sliding rod 14 passes through the through hole 163, is provided around the outer circumference of the vertical sliding rod 14 and is slidably connected to the vertical sliding rod 14, that is, the trigger block 16 is slidable along the axial direction of the vertical sliding rod 14; the trigger block 16 is provided so as to face the exhaust gas outlet end, and the exhaust gas combustion device 15 is provided above the trigger block 16. Preferably, the vertical sliding rods 14 in this embodiment are two in number, each provided on both sides above the exhaust gas outlet end, and the two vertical sliding rods 14 can improve the sliding stability of the trigger block 16.

[0090] A push switch 151 is provided at the bottom of the exhaust gas combustion device 15 in this embodiment. The push switch 151 is positioned opposite the trigger block 16, and the trigger of the trigger block 16 turns on the push switch, causing the exhaust gas combustion device 15 to ignite. Preferably, the exhaust gas combustion device 15 in this embodiment is a pulse igniter.

[0091] The trigger device according to this embodiment further comprises a limiting block 17 fixedly connected to the uppermost part of the vertical sliding rod 14, and an elastic return member, wherein the bottom end face of the limiting block 17 is fixedly connected to one end of the elastic return member, the other end of the elastic return member is fixedly connected to the trigger block 16, and the limiting block 17 is fixedly connected to the exhaust gas combustion device. The elastic return member is a return spring 19 or an elastic pad, and the elastic pad may be made of rubber or plastic. Preferably, the elastic return member according to this embodiment is a return spring 19.

[0092] Preferably, in this embodiment, the bottom end face of the push switch 151 is positioned lower than the bottom end face of the limiting block 17, thereby making it easier for the trigger block 16 to contact the push switch 151 and improving trigger efficiency. Preferably, the trigger block 16 in this embodiment is made of a flame-retardant material (insulating material). Preferably, the trigger block 16 in this embodiment has a hollow structure, thereby reducing the weight of the trigger block 16 and making it easier to move. Preferably, the lower end face 161 of the trigger block 16 in this embodiment is an arc-shaped surface that is recessed inward at its center, and the arc-shaped surface is positioned to face the exhaust gas outlet end. Preferably, in this embodiment, an arc-shaped groove 162 with a rectangular cross-section is provided at the bottom of the trigger block 16, and the arc-shaped groove 162 is positioned to face the exhaust gas outlet end. Preferably, the trigger block 16 in this embodiment is made of a fire-resistant material and is intended to prevent flames from returning to the lithium battery or PACK box 11.

[0093] Example 4 As shown in Figure 4, in addition to the features of Embodiment 3, the battery thermal runaway exhaust gas treatment device according to this embodiment has a mounting frame 18 fixedly attached to the limiting block 17, and locking devices 181 are provided at both ends of the mounting frame 18 corresponding to the exhaust gas combustion device 15. The exhaust gas combustion device 15 is fixed by the locking devices 181, thereby preventing the exhaust gas combustion device 15 from shaking during the triggering process of the press switch 151 of the exhaust gas combustion device 15.

[0094] Example 5 As shown in Figures 1 and 4, the battery thermal runaway exhaust gas treatment device according to this embodiment has, in addition to the features of Embodiment 4, a push-up block 164 integrally fixed to the uppermost part of the trigger block 16, and the push-up block 164 is positioned to face the push switch 151. Simultaneously, the battery thermal runaway exhaust gas treatment device further comprises a flame-retardant heat-insulating plate 131 fixedly connected to the uppermost end face of the lithium battery or PACK box 11, the combustion tank 13 and the vertical sliding rod 14 both fixedly connected to the lithium battery or PACK box 11 via the flame-retardant heat-insulating plate 131, the bottom end face of the combustion tank 13 fixedly connected to the uppermost end face of the flame-retardant heat-insulating plate 131, the uppermost end face of the vertical sliding rod 14 fixedly connected to the uppermost end face of the flame-retardant heat-insulating plate 131, the flame-retardant heat-insulating plate 131 is provided with a communication hole, and the combustion tank 13 communicates with the exhaust gas outlet end through the communication hole in the flame-retardant heat-insulating plate 131; the flame-retardant heat-insulating plate 131 provides fire and heat isolation between the lithium battery or PACK box 11 and the exhaust gas combustion device and trigger device; a pressure release module is provided at the exhaust gas outlet end that penetrates the flame-retardant heat-insulating plate 131 and extends into the combustion chamber of the combustion tank 13; the uppermost part of the combustion tank 13 is open. Preferably, the flame-retardant heat-insulating board 131 according to this embodiment is a rubber / plastic board, a foamed fire-resistant board, or a fire-resistant rock wool board.

[0095] Example 6 In this embodiment, a method for treating exhaust gas from a battery's thermal runaway is proposed, which includes a step in which the exhaust gas from the battery's thermal runaway is combusted before being discharged into the atmosphere.

[0096] According to the present invention, the risk of explosion and combustion occurring within the lithium battery or PACK box 11 due to the accumulation of flammable gases within the lithium battery or PACK box 11 can be effectively prevented; at the same time, since the flammable gases in the exhaust gas in the combustion tank 13 are released into the atmosphere after burning out, air pollution is prevented.

[0097] Example 7 In this embodiment, a method for treating battery thermal runaway exhaust gas is proposed, which includes a step in which the exhaust gas due to battery thermal runaway is combusted before being discharged into the atmosphere. In this battery thermal runaway exhaust gas treatment method, a trigger device approaches the exhaust gas combustion device 15 until the exhaust gas combustion device 15 is triggered by the pressure of the exhaust gas discharged from the lithium battery or PACK box 11 and the exhaust gas is combusted, and the combusted exhaust gas is discharged into the atmosphere. The processing method specifically includes the following steps: A large amount of flammable gas is collected in the lithium battery or PACK box 11, and when the gas pressure reaches its limit, exhaust gas is discharged from the lithium battery or PACK box 11, and the instantaneous pressure of the discharged exhaust gas pushes the pressure plug upward from the exhaust gas outlet end, and the pressure plug then approaches the push switch 151 of the exhaust gas combustion device 15 until the push switch 151 is turned on and the exhaust gas is burned in the exhaust gas combustion device 15; after the exhaust gas has been burned, the burnt gas is discharged from the top of the combustion tank 13. Alternatively, the process may include the following steps: 1) A large amount of flammable gas is collected in the lithium battery or PACK box 11, and when the gas pressure reaches its limit, the pressure release valve 12 or explosion-proof membrane at the exhaust gas outlet end is opened, and the exhaust gas is discharged along the exhaust gas outlet end. Furthermore, the trigger block 16 is triggered by the instantaneous pressure of the exhaust gas discharged from the exhaust gas outlet end, causing its upward-pushing block 164 to touch the push switch 151 of the exhaust gas combustion device 15, which activates the push switch 151, and the trigger block 16 approaches the exhaust gas combustion device 15 until the exhaust gas is burned in the exhaust gas combustion device 15, and after the exhaust gas has been burned, the burnt-out gas is discharged from the top of the combustion tank 13. 2) When the instantaneous pressure of the exhaust gas is released and the pressure of the exhaust gas discharged from the exhaust gas outlet end decreases, the trigger block 16 returns to its initial state by the elastic return member.

[0098] Example 8 As shown in Figures 6 to 8, the battery thermal runaway exhaust gas treatment device according to this embodiment comprises an exhaust pipe 241, several exhaust nozzles 242, an ignition switch 243, an ignition device 244, and a pressure valve 245. Each of the exhaust nozzles 242 is fixedly connected to the exhaust pipe 241 to form an exhaust passage for the thermal runaway exhaust gas. The pressure valve 245 and the ignition switch 243 are provided in the exhaust passage. At normal pressure, the exhaust passage is sealed by the pressure valve 245 and maintained in a closed state. At high pressure, a piston inside the pressure valve 245 is pushed and moved by the air pressure, opening the exhaust passage. At the same time, the pressure valve 245 contacts the ignition switch 243, activating the ignition device 244. When thermal runaway exhaust gas is generated in the battery, as the air pressure gradually increases, several pistons inside the pressure valves 245 are pushed sequentially, the ignition switches 243 are turned on sequentially, the ignition device 244 is activated, and the thermal runaway exhaust gas begins to burn. A flashback prevention valve 246 is provided inside the exhaust pipe 241. A sealing gasket 2451 is provided in the pressure valve 245. Since the exhaust pipe 241 and the exhaust nozzle 242 are fixed to the fixed pipe 247 and form a gas passage, the runaway exhaust gas due to battery overheating passes through the exhaust pipe 241, the fixed pipe 247, and the exhaust nozzle 242 in that order.

[0099] In this embodiment, the pressure valve 245 is fixedly installed within the connection point between the fixed cylinder 247 and the exhaust nozzle 242. The pressure valve 245 is provided with a projection 2452, and an ignition switch 243 is provided inside the exhaust nozzle 242. When the piston of the pressure valve 245 moves and the projection 2452 contacts the ignition switch 243, the ignition device 244 is activated. The ignition device 244 is a pulse igniter and is fixedly mounted to the exhaust cylinder 241 by a support base 249. The above-mentioned battery thermal runaway exhaust gas treatment device is further provided with a mounting portion 248 for mounting to the battery shell.

[0100] Example 9 As shown in Figures 9 and 10, this embodiment proposes a battery shell 21 equipped with a battery thermal runaway exhaust gas treatment device 24 according to Embodiment 8. The battery shell 21 is connected to the mounting portion 248 of the battery thermal runaway exhaust gas treatment device 24 via an explosion-proof port 211. When there are many batteries, multiple batteries are connected in parallel with a confluence pipe, and the confluence pipe is connected to the thermal runaway exhaust gas treatment device via the mounting portion 248. If any one single cell in the battery group experiences thermal runaway, the generated thermal runaway exhaust gas is discharged to the thermal runaway exhaust gas treatment device via the confluence pipe for treatment. This device is simple in structure, safe, small in volume, environmentally friendly, and highly efficient. This embodiment further proposes a battery box and battery equipped with a battery thermal runaway exhaust gas treatment device 24 according to Embodiment 8.

[0101] Example 10 As shown in Figures 11 to 13, the battery thermal runaway exhaust gas treatment device according to this embodiment comprises a first exhaust pipe 31, a second exhaust pipe 32, an ignition device 33, an exhaust nozzle 35, and a magnetic switch 34; there is at least one of each: the second exhaust pipe 32, the exhaust nozzle 35, the magnetic switch 34, and the ignition device 33; the inlet of the second exhaust pipe 32 is connected to the outlet of the first exhaust pipe 31; the ignition device 33 is provided at the outlet of the second exhaust pipe 32 to burn the thermal runaway exhaust gas discharged from the second exhaust pipe 32; the multiple magnetic switches 34 are provided in one-to-one correspondence with the second exhaust pipe 32 to activate the ignition device 33 and burn the thermal runaway exhaust gas by transmitting an electrical signal to the ignition device 33 when the thermal runaway exhaust gas passes through the second exhaust pipe 32. The magnetic switch 34 is a mechanical magnetic switch, a gravity-type magnetic switch, or a magnetic-type magnetic switch. The magnetic switch 34 is preferably a normally closed switch, which seals the first exhaust pipe 31 and prevents external water vapor and impurities from entering the first exhaust pipe 31. The exhaust nozzle 35 is preferably a tapered pipe structure, with its large end connected in a one-to-one correspondence to the outlet ends of a plurality of second exhaust pipes 32, and a plurality of ignition devices 33 provided in a one-to-one correspondence to the small end outlets of the exhaust nozzle 35. In other words, the large end of the tapered exhaust nozzle is connected to the second exhaust pipe 32, and the ignition devices 33 are provided at the small end of the tapered exhaust nozzle 35. With an exhaust nozzle 35 configured in this way, all of the discharged runaway exhaust gas can be burned by the ignition devices 33, resulting in more sufficient combustion of the runaway exhaust gas and preventing some of the runaway exhaust gas from leaking out from the outlet edge of the second exhaust pipe 32. In addition, the first exhaust pipe 31 may be equipped with a flashback prevention valve 36 to prevent backflow of thermal runaway exhaust gas in the first exhaust pipe 31 and the second exhaust pipe 32. Specifically, this flashback prevention valve 36 is a one-way valve, which has a simple structure and is easy to install.

[0102] In the battery thermal runaway exhaust gas treatment device according to this embodiment, there is at least one second exhaust pipe 32, a magnetic switch 34, and an ignition device 33. If there is one second exhaust pipe 32, it can share piping with the first exhaust pipe 31, that is, the second exhaust pipe 32 and the first exhaust pipe 31 share the same piping. When actually installing and using the device, the number of second exhaust pipes 32 and ignition devices 33 can be arranged according to the number of batteries and needs, and can be arranged as two, three, or four, etc. When two or more are arranged, the reliability of combustion can be ensured, and if one ignition device 33 fails or malfunctions, the other ignition devices 33 can operate normally. The above-mentioned ignition device 33 can have various structures, for example, a pulse igniter can be used, and as the power supply method for the pulse igniter, dry cell batteries or AC power can be used depending on the site environment. The magnetic switch 34 can have various structures, as long as the ignition device 33 is activated when the runaway thermal exhaust gas passes through it. For example, it can be a mechanical magnetic switch, a gravity-type magnetic switch, or a magnetic-type magnetic switch.

[0103] To ensure the ignition device 33 is more securely mounted and to guarantee its safety, the ignition head 331 of the ignition device 33 can be mounted on the second exhaust pipe 32 via a holder 37. The exhaust gas ignition head 331 of this device must be at least 20 cm away from the upper end of the magnetic switch 34 to avoid burnout of the magnetic switch 34 due to heat transfer from the metal exhaust gas combustion pipe. The pulse igniter has a dry cell or AC power interface provided in the power box 38, and a signal wire 332 is sealed and connected to the power box 38 via a waterproof connector 39. The pulse igniter is powered by a self-portable dry cell battery, can maintain pulse ignition for more than 3 hours, and, when the normally open magnetic sensing switch is engaged, can output a pulse signal to ignite flammable gases as runaway exhaust gases pass through. The principle of the magnetic switch 34 is as follows: the magnetic valve core 342 inside the switch is pushed by airflow or water flow so that the permanent magnet in the magnetic valve core 342 approaches the sensing element 341 on the black switch outside the switch and outputs a signal. On the other hand, if there is no gas or water flow, the two permanent magnets inside the switch return to their original position due to repulsion and close. In the case of a spring-type switch, it returns to its original position due to the elastic force of the spring and turns the switch off. In the case of a gravity-type switch, it returns to its original position due to the centripetal force of gravity, but gravity-type switches must be mounted vertically. The signal wire 332 of the sensing element 341 passes through the power box 38 and is connected to the control circuit of the pulse igniter inside the power box 38, and can further control the ignition of the ignition head 331 of the ignition device 33.

[0104] In the apparatus according to this embodiment, a combination of a magnetic switch and pulse ignition is used to process the ignition of exhaust gas after battery thermal runaway. The main flammable components of the exhaust gas are hydrogen gas, carbon monoxide, hydrocarbon compounds, and vaporized electrolyte. When ignited by the pulse igniter, complete combustion occurs, producing harmless products. With this apparatus, since exhaust gas due to thermal runaway can be combusted, air pollution caused by thermal runaway exhaust gas is avoided, and dangerous incidents such as explosions and fires caused by the accumulation of thermal runaway exhaust gas inside the lithium battery are also avoided, thereby greatly improving the safety of the battery.

[0105] The battery thermal runaway exhaust gas treatment device according to the present invention activates an ignition device 33 using a magnetic switch 34. The magnetic switch 34 outputs a signal via a magnetic valve core 342 and a sensing element 341 to trigger the ignition device 33. Compared to a pressure switch, the magnetic switch 34 has higher sensitivity and can detect and trigger when thermal runaway exhaust gas passes through the second exhaust pipe 32. Compared to a pressure switch, the switch does not require a high sensing pressure. In other words, it can detect the thermal runaway exhaust gas at its initial or initiation stage and immediately trigger the ignition device 33. The device is highly safe, and because the ignition device 33 burns the thermal runaway exhaust gas at its initial or initiation stage, it can prevent the thermal runaway exhaust gas from leaking from the outlet of the second exhaust pipe 32, which would cause environmental pollution or safety accidents, thus improving the safety of the battery to some extent. At the same time, the device of the present invention has a simple structure, is easy to install, and can be assembled using existing equipment.

[0106] In this embodiment, a battery group is further proposed, which comprises the above-mentioned battery thermal runaway exhaust gas treatment device, at least one battery, and a confluence pipe, wherein the inlet of the first exhaust pipe 31 is connected to the explosion-proof ports or explosion-proof pipes of multiple battery shells via the confluence pipe, that is, one end of the confluence pipe is connected to the explosion-proof ports of multiple battery shells, and the other end of the confluence pipe is connected to the inlet of the first exhaust pipe 31. When thermal runaway occurs in the core of one or more battery shells, the explosion-proof ports are opened, and high-temperature material inside the battery enters the first exhaust pipe 31 and the second exhaust pipe 32 through the explosion-proof ports or explosion-proof pipes. At this time, if the magnetic switch 34 detects the thermal runaway exhaust gas, it activates the ignition device 33, and the thermal runaway exhaust gas is burned by the ignition device 33. To further increase safety, a cooling device filled with coolant may be connected to the explosion-proof ports or explosion-proof pipes of the battery shells, and the thermal runaway exhaust gas may be cooled and adsorbed before being passed through and burned.

[0107] Example 11 As shown in Figures 14 to 17, the battery thermal runaway exhaust gas treatment device according to this embodiment comprises a combustion chamber 42, an ignition device, and a trigger device. The ignition device is located inside the combustion chamber 42, and the trigger device is electrically connected to the ignition device. The combustion chamber 42 is connected to the electrolyte chamber inside the battery and is for storing the thermal runaway exhaust gas generated during thermal runaway of the battery. The trigger device is either a pressure switch 49 and / or a temperature control switch 412, or an electrical contact pressure gauge. The trigger device triggers ignition by the ignition device based on the pressure and / or temperature of the thermal runaway exhaust gas to burn the thermal runaway exhaust gas and reduce the flammable components in the thermal runaway exhaust gas. Preferably, the flammable components in the thermal runaway exhaust gas are completely burned out, thus preventing secondary combustion of the gas discharged after combustion and achieving the objective of completely preventing combustion. Preferably, the combustion chamber 42 according to this embodiment is provided on one side close to the explosion-proof port of the battery. Preferably, while the runaway thermal exhaust gas is burning in the combustion chamber 42, it is necessary to continuously replenish the combustion-supporting gas in the combustion chamber 42. At the same time, it is necessary to timely discharge any gas remaining in the combustion chamber 42 after combustion has finished. The battery runaway thermal exhaust gas treatment device further includes a runaway thermal exhaust gas discharge pipe 41, the combustion chamber 42 is connected to the electrolyte chamber of the battery via the runaway thermal exhaust gas discharge pipe 41, and an explosion-proof device 410 is provided inside the runaway thermal exhaust gas discharge pipe 41.

[0108] The ignition device according to this embodiment comprises an igniter located inside the combustion chamber 42 and a power supply 44 provided inside or outside the combustion chamber 42. The power supply 44 is electrically connected to the igniter and trigger device, and the trigger device is electrically connected to the igniter. The igniter and power supply 44 can withstand temperatures greater than 200°C. The ignition device is a pulse igniter 43. The battery thermal runaway exhaust gas treatment device further comprises a flashback prevention device 48 provided between the thermal runaway exhaust gas discharge pipe 41 and the combustion chamber 42, and a windproof cover 46 provided at the top of the combustion chamber 42. The flashback prevention device prevents flames from entering the battery when burning the thermal runaway exhaust gas in the combustion chamber, and the windproof cover prevents wind from entering the combustion chamber, ensuring that the thermal runaway exhaust gas in the combustion chamber burns sufficiently. The chamber wall of the combustion chamber 42 is provided with an air intake port 45 for supplying the combustion-supporting gas into the combustion chamber 42, and the combustion-supporting gas is air. The chamber wall of the combustion chamber 42 is provided with vent holes 47 for releasing gases generated after combustion.

[0109] In this embodiment, the temperature tolerance of the igniter and power supply is greater than 200°C, thereby ensuring that the igniter and power supply can withstand the high temperature of the runaway exhaust gas. If the trigger device is a pressure switch 49 and / or a temperature control switch 412, the pressure switch 49 and / or the temperature control switch 412 are provided between the explosion-proof device 410 and the combustion chamber 42, so that the pressure switch and / or temperature control switch conduct due to the high pressure or high temperature of the runaway exhaust gas in the runaway exhaust gas discharge pipe, and further trigger ignition by the igniter; if the trigger device is an electrical contact pressure gauge, the contact pressure of the electrical contact pressure gauge is less than the explosion-proof pressure of the explosion-proof device 410, and the electrical contact pressure gauge is provided between the electrolyte chamber of the battery and the combustion chamber 42, so that the electrical contact pressure gauge conducts directly due to the high pressure generated inside the battery, and further trigger ignition by the igniter. If the trigger device consists of a pressure switch 49 and a temperature control switch 412, the pressure switch 49 and the temperature control switch 412 are connected in parallel or in series. When the pressure switch and the temperature control switch are connected in parallel, it becomes possible for the temperature control switch to conduct due to high temperature or the pressure switch to conduct due to high pressure; when the pressure switch and the temperature control switch are connected in series, it becomes necessary for the temperature control switch to conduct due to high temperature and the pressure switch to conduct due to high pressure. When connected in series, false contact can be effectively prevented. The contact pressure of the electrical contact pressure gauge is less than the explosion-proof pressure of the explosion-proof device, thereby ensuring that the electrical contact pressure gauge is already conducting before the explosion-proof device is opened, and ensuring that the ignition device enters the ignition state in advance.

[0110] Example 12 As shown in Figure 14, the battery thermal runaway exhaust gas treatment device according to this embodiment is equipped with a thermal runaway exhaust gas discharge pipe 41 in addition to the components of Embodiment 11, and the trigger device is a pressure switch 49; one end of the thermal runaway exhaust gas discharge pipe 41 is connected to the electrolyte chamber inside the battery, and the other end is connected to the combustion chamber 42, that is, the combustion chamber 42 is connected to the electrolyte chamber inside the battery via the thermal runaway exhaust gas discharge pipe 41, and an explosion-proof device 410 is provided inside the thermal runaway exhaust gas discharge pipe 41; the pressure switch 49 is provided between the explosion-proof device 410 and the combustion chamber 42, and the ignition device comprises an igniter located inside the combustion chamber 42 and a power supply 44 provided inside or outside the combustion chamber 42, with the power supply 44, pressure switch 49 and ignition head being connected in series sequentially from front to back. Preferably, the pressure switch 49 according to this embodiment is provided at the vent of the thermal runaway exhaust gas discharge pipe 41.

[0111] The explosion-proof device 410 in this embodiment is an explosion-proof membrane 411 or an explosion-proof valve. Preferably, the igniter and power supply 44 in this embodiment have a temperature tolerance greater than 200°C and can withstand the high temperature of runaway exhaust gas in the combustion chamber 42. Preferably, the ignition device in this embodiment is a pulse igniter 43. It should be noted that the ignition device in this embodiment may be a different igniter from the pulse igniter 43. The power supply 44 in this embodiment is a rechargeable power supply.

[0112] The battery thermal runaway exhaust gas treatment device according to this embodiment further comprises a flashback prevention device 48 provided between the thermal runaway exhaust gas discharge pipe 41 and the combustion chamber 42, and a windproof cover 46 provided at the top of the combustion chamber 42. The flashback prevention device 48 effectively prevents flames in the combustion chamber 42 from entering the inside of the battery, ensuring the safety of battery operation, and the windproof cover 46 effectively prevents wind from entering the combustion chamber 42. The chamber wall of the combustion chamber 42 is provided with an air intake port 45 for replenishing the combustion chamber 42 with a combustion-supporting gas. Preferably, the combustion-supporting gas in this embodiment is air, but it should be noted that the combustion-supporting gas may be oxygen gas or another combustion-supporting gas. There are two air intake ports 45 in this embodiment, provided on opposite sides of the combustion chamber 42. The chamber wall of the combustion chamber 42 is provided with a vent hole 47 for releasing gas generated after combustion. In this embodiment, the air intake port 45 is located near the bottom of the combustion chamber 42, and the air vent 47 is located near the ceiling of the combustion chamber 42.

[0113] Example 13 As shown in Figure 15, the battery thermal runaway exhaust gas treatment device according to this embodiment, in addition to the features of Embodiment 12, has a trigger device which is a temperature control switch 412, and the temperature control switch 412 is provided between the explosion-proof device 410 and the combustion chamber 42; preferably, the temperature control switch 412 according to this embodiment is provided at the vent port of the thermal runaway exhaust gas discharge pipe 41.

[0114] Example 14 As shown in Figure 16, the battery thermal runaway exhaust gas treatment device according to this embodiment is equipped with a thermal runaway exhaust gas discharge pipe 41 in addition to the components of Embodiment 11, and its trigger device is a pressure switch 49 and a temperature control switch 412; one end of the thermal runaway exhaust gas discharge pipe 41 is connected to the electrolyte chamber inside the battery, and the other end is connected to the combustion chamber 42, that is, the combustion chamber 42 is connected to the electrolyte chamber inside the battery via the thermal runaway exhaust gas discharge pipe 41, and an explosion-proof device 410 is provided inside the thermal runaway exhaust gas discharge pipe 41; the pressure switch 49 and the temperature control switch 412 are provided between the explosion device 410 and the combustion chamber 42, and the ignition device The system comprises an igniter positioned inside the combustion chamber 42 and a power supply 44 provided inside or outside the combustion chamber 42. A pressure switch 49 is provided at the air outlet of the thermal runaway exhaust gas discharge pipe 41, and a temperature control switch 412 is provided at the air intake for the thermal runaway exhaust gas of the combustion chamber 42. The power supply 44, pressure switch 49, temperature control switch 412, and ignition head are connected in series sequentially from front to back. When the pressure switch 49 and temperature control switch 412 are connected in series, conduction of the temperature control switch 412 due to high temperature and conduction of the pressure switch 49 due to high pressure are required, effectively preventing accidental contact. It is particularly important to note that the pressure switch 49 and temperature control switch 412 may also be connected in parallel. When the pressure switch and temperature control switch are connected in parallel, conduction of the temperature control switch due to high temperature or conduction of the pressure switch due to high pressure becomes possible.

[0115] Example 15 As shown in Figure 17, the battery thermal runaway exhaust gas treatment device according to this embodiment is equipped with a thermal runaway exhaust gas discharge pipe 41 in addition to the features of Embodiment 11, and the trigger device is an electrical contact pressure gauge; one end of the thermal runaway exhaust gas discharge pipe 41 is connected to the electrolyte chamber inside the battery, and the other end is connected to the combustion chamber 42, that is, the combustion chamber 42 is connected to the electrolyte chamber inside the battery via the thermal runaway exhaust gas discharge pipe 41, and an explosion-proof device 410 is provided inside the thermal runaway exhaust gas discharge pipe 41; the electrical contact pressure gauge is provided between the electrolyte chamber and the combustion chamber 42 of the battery, specifically a three-way pipe is connected to the explosion-proof port of the battery, the explosion-proof port is connected to the first connection port of the three-way pipe, the second connection port of the three-way pipe is connected to the combustion chamber 42 via the thermal runaway exhaust gas discharge pipe 41, the third connection port of the three-way pipe is connected to the electrical contact pressure gauge, the electrical contact pressure gauge is connected to the ignition head, and a power supply 44 supplies power to the electrical contact pressure gauge and the ignition head.

[0116] The explosion-proof device 410 in this embodiment is an explosion-proof membrane 411 or an explosion-proof valve, and preferably the explosion-proof device 410 in this embodiment is an explosion-proof membrane 411. Preferably the contact pressure of the electrical contact pressure gauge in this embodiment is less than the explosion-proof pressure of the explosion-proof device 410. Preferably the igniter and power supply 44 in this embodiment can withstand temperatures greater than 200°C and can withstand the high temperature of the runaway exhaust gas in the combustion chamber 42. Preferably the ignition device in this embodiment is a pulse igniter 43, and it should be noted that the ignition device in this embodiment may be a different igniter from the pulse igniter 43.

[0117] In this embodiment, the chamber wall of the combustion chamber 42 is provided with an air intake port 45 for supplying the combustion-supporting gas into the combustion chamber 42. Preferably, the combustion-supporting gas in this embodiment is air, and it should be noted that the combustion-supporting gas may be oxygen gas or another combustion-supporting gas. Preferably, the air intake port 45 in this embodiment is located near the bottom of the combustion chamber 42, and the air vents 47 are located near the ceiling of the combustion chamber 42. Preferably, there are two air intake ports 45 in this embodiment, each located on an opposing side of the combustion chamber 42. The chamber wall of the combustion chamber 42 is provided with air vents 47 for releasing the gas generated after combustion.

[0118] This invention proposes a device for treating runaway thermal exhaust gases from a battery, and its operating principle is as follows: When thermal runaway occurs inside a battery, the pressure and temperature inside the battery rise rapidly, and the high pressure inside the battery opens the explosion-proof device 410, causing the runaway thermal exhaust gas to be discharged into the combustion chamber 42 via the runaway thermal exhaust gas discharge pipe 41. At the same time, a combustion-supporting gas is introduced into the combustion chamber 42, the trigger device is activated, and the ignition device is ignited. The runaway thermal exhaust gas continuously accumulates in the combustion chamber 42, and once the combustion conditions are met, the runaway thermal exhaust gas burns, combustion begins, and combustion continues until the combustible components in the runaway thermal exhaust gas are completely burned out or the concentration of combustible components becomes low enough to prevent further combustion. The gas after combustion is then discharged into the atmosphere via the vent 47.

[0119] Example 16 As shown in Figures 18 to 26, the battery thermal runaway exhaust gas treatment device according to this embodiment comprises an igniter 51, a trigger device 52, and an exhaust gas piping 53; the trigger device 52 includes a control circuit board 521 and a sensor 522, the sensor 522 is provided on the exhaust gas piping 53 or the battery shell, its output terminal is connected to the control circuit board 521, and is configured to output a signal to the control circuit board 521 when the battery 55 experiences thermal runaway, and then the control circuit board 521 outputs an ignition current in response to the signal; the igniter 51 is an arc igniter 511 or a resistance wire igniter 512, is provided on the exhaust gas piping 53, and burns the thermal runaway exhaust gas discharged from the exhaust gas piping 53 by the ignition current output from the control circuit board 521. According to this device, exhaust gases from thermal runaway of the battery 55 can be burned in a timely manner, thus avoiding environmental air pollution caused by the generated thermal runaway exhaust gases, and also preventing dangerous incidents such as explosions and fires that occur when the thermal runaway exhaust gases accumulate inside the battery 55, thereby significantly improving the safety of the battery. The igniter 51 of this device is either an arc igniter 511 or a resistance wire igniter 512, and since the arc igniter 511 or resistance wire igniter 512 is a continuous ignition device, the influence of wind and rain in the external environment on the performance of the igniter 51 is avoided, and furthermore, the risk of not being able to reliably burn the thermal runaway exhaust gases is avoided. According to this device, exhaust gases from thermal runaway of the battery 55 can be burned in a timely manner, thus avoiding air pollution caused by the emitted thermal runaway exhaust gases, and also preventing dangerous incidents such as explosions and fires that occur when the thermal runaway exhaust gases accumulate inside the battery 55, thereby significantly improving the safety of the battery 55.

[0120] In this embodiment, the structure of the resistance wire igniter 512 is not particularly limited as long as it can ignite the thermal runaway exhaust gas generated in the battery 55 in a timely and reliable manner. For example, the resistance wire igniter 512 comprises an igniter shell 5111, a resistance wire 5121, a ceramic retaining ring 5116, and a ceramic retaining ring 5117; an ignition chamber 5114 communicating with the exhaust gas piping 53 is provided inside the igniter shell 5111, the resistance wire 5121 is provided inside the ignition chamber 5114, and in addition, the resistance wire 5121 is connected to a control circuit board 521 located outside the igniter shell 5111. Specifically, a ring groove is provided within the ceramic retaining ring 5116, and the resistance wire 5121 is placed within the ring groove and firmly pressed by the ceramic retaining ring 5117. In this way, the resistance wire 5121 is mounted inside the igniter shell 5111 by the ceramic retaining ring 5116 and the ceramic retaining ring 5117. Since the ceramic retaining ring 5116 and the ceramic retaining ring 5117 are insulating materials, good insulation is achieved between the igniter shell 5111 and the resistance wire 5121. The material of the resistance wire 5121 in the resistance wire igniter 512 is an iron-chromium-aluminum resistance wire or a nichrome resistance wire, etc. Compared to an electric pulse igniter, the resistance wire igniter 512 has a simpler structure and does not require circuit elements such as voltage boosters or oscillators. The above-described resistance wire igniter 512 has a simple structure, does not require circuit elements such as voltage boosters or oscillators, can be placed inside the exhaust gas piping 53, and can also be used as a windbreak electric heating wire, ensuring reliable combustion of exhaust gas caused by thermal runaway of the battery 55. The battery thermal runaway exhaust gas treatment device according to this embodiment is an automatically controlled resistance wire ignition device, installed inside the exhaust gas piping 53, which, upon detecting the presence of flammable gas in the exhaust gas piping 53, outputs a signal to the control circuit board 521, which then causes the resistance wire 5121 to conduct, rapidly heating the resistance wire 5121 until it reaches the flammable temperature of the gas, allowing the gas to burn and preventing a large amount of gas from accumulating.

[0121] The arc igniter 511 according to this embodiment can have various structures and is installed in the exhaust gas piping 53. It burns the runaway exhaust gas discharged from the exhaust gas piping 53 by an ignition current output from the control circuit board 521. For example, the arc igniter 511 comprises an igniter shell 5111, a first electrode wire 5112, a second electrode wire 5113, a ceramic retaining ring 5116, and a ceramic retaining ring 5117; an ignition chamber 5114 communicating with the exhaust gas piping 53 is provided inside the igniter shell 5111, one end of the first electrode wire 5112 and one end of the second electrode wire 5113 are provided inside the ignition chamber 5114, and an ionization gap 5115 is provided between them, and the other ends of both the first electrode wire 5112 and the second electrode wire 5113 are connected to the control circuit board 521 via a high-temperature conductor. Furthermore, the control circuit board 521 is equipped with an oscillation circuit for converting DC power to AC power, and a boost coil 5118 is provided between the arc igniter 511 and the control circuit board 521 to boost the AC power output from the control circuit board 521 and transport it to the first electrode wire 5112 and the second electrode wire 5113, thereby ionizing the air between them and generating an arc. In this device, a ring groove is provided within the ceramic retaining ring 5116, and the first electrode wire 5112 and the second electrode wire 5113 are placed within the ring groove and firmly pressed by the ceramic retaining ring 5117. In this way, the first electrode wire 5112 and the second electrode wire 5113 are mounted within the igniter shell 5111 by the ceramic retaining ring 5116 and the ceramic retaining ring 5117. Since the ceramic retaining ring 5116 and the ceramic retaining ring 5117 are insulating materials, contact between the first electrode wire 5112 and the second electrode wire 5113 and the igniter shell 5111 can be prevented, and good insulation between the igniter shell 5111 and the electrode wires is achieved. Between the arc igniter 511 and the control circuit board 521, there is a boost coil 5118 that boosts the AC power output from the control circuit board 521 and transports it to the first electrode wire 5112 and the second electrode wire 5113, thereby ionizing the air between them and generating an arc.The arc igniter 511 described above has a voltage of approximately 100kV in the boost circuit (i.e., the boost coil 5118), which is much higher than that of the pulse igniter 51. Therefore, it has features such as faster arc generation and faster ignition speed, and can burn runaway exhaust gases from battery thermals in a timely and rapid manner. In addition, the control circuit board 521 is equipped with an oscillation circuit for converting DC power to AC power. In the arc igniter 511 according to this embodiment, the material of the first electrode wire 5112 and the second electrode wire 5113 is an alloy such as a copper-chromium alloy or a copper-tungsten alloy.

[0122] The battery-thermal runaway exhaust gas treatment device according to this embodiment is an automatically controlled arc ignition device, which is attached to the end of the exhaust gas pipe 53. When the sensor 522 detects the presence of flammable gas in the exhaust gas pipe 53, it feeds a signal back to the control circuit board 521, which then connects the battery 55 and the boost coil 5118. After the voltage is boosted by the boost coil 5118, the air between the nearby arc generating heads is ionized, generating an arc, and the flammable gas discharged from the exhaust gas pipe 53 begins to burn. In other words, if the battery 55 experiences thermal runaway, and gas passes through the exhaust gas pipe 53, the pressure sensor 522 detects a pressure change in the exhaust gas pipe 53 (or the gas sensor 522 detects the passage of flammable gas, or the temperature sensor 522 detects a rapid rise in temperature), then the sensor 522 transmits a signal to the control circuit board 521. When the control circuit board 521 receives the signal, the relay closes, and the oscillation current (or oscillator) of the control circuit board 521 causes the DC current of the battery 55 to become AC. The current is converted into an electric current and output into the boost coil 5118, where it is instantaneously boosted to a high voltage of 50KV. This current is then transported via a high-temperature conductor to the first electrode wire 5112 and the second electrode wire 5113 of the igniter 51. If the distance between the two first electrode wires 5112 and the second electrode wire 5113 is less than 8mm, the instantaneous high voltage ionizes the air between the first electrode wire 5112 and the second electrode wire 5113, generating an arc. If the flammable gas in the exhaust gas piping 53 encounters the arc, it will ignite.

[0123] The trigger device 52 according to this application may be a sensor 522 having a different structure, as long as it is capable of transmitting a signal when thermal runaway of the battery 55 occurs. In other words, when thermal runaway of the battery occurs, it can detect parameters such as temperature, pressure, or gas volume fraction in real time and emit a signal when it exceeds a set threshold, and such signals may be electrical signals or mechanical signals. Specifically, the sensor 522 may be at least one selected from a pressure sensor, a gas sensor, or a temperature sensor, and specifically, the pressure sensor, gas sensor, and temperature sensor may be installed in the exhaust gas piping 53 or the battery shell. When installed on-site, the pressure sensor, gas sensor, or temperature sensor may be installed in the exhaust gas piping 53 by a three-way pipe 54 or connected to the battery shell by a screw thread. When installed in this manner, thermal runaway exhaust gas can be detected directly and quickly, and can be reliably detected at the start or early stages of thermal runaway of the battery 55, making it possible to process the thermal runaway exhaust gas of the battery in a timely manner.

[0124] In order to ensure the combustion of runaway exhaust gases from the battery, multiple igniters 51 may be installed. In this case, the exhaust gas piping 53 comprises an exhaust gas main pipe 531 and multiple exhaust gas branch pipes 532; the inlets of the multiple exhaust gas branch pipes 532 communicate with the outlets of the exhaust gas main pipe 531, and an igniter 51 is provided at each outlet of the multiple exhaust gas branch pipes 532. Accordingly, there are also multiple trigger devices 52, with multiple trigger devices 52 provided in a one-to-one correspondence between the multiple exhaust gas branch pipes 532. At the same time, a flashback prevention device is provided in either the exhaust gas main pipe 531 or the exhaust gas branch pipes 532, and this flashback prevention device is often a flashback prevention valve, in order to prevent the backflow of runaway exhaust gases in the exhaust gas main pipe 531 or the exhaust gas branch pipes 532. When actually installing and using the system, the number of exhaust gas branch pipes 532 and igniters 51 can be arranged according to the number of batteries 55 and the needs, and can be arranged in numbers of 2, 3, 4...10, etc. When two or more are arranged, the reliability of combustion can be ensured, and if one igniter 51 fails or malfunctions, the other igniters 51 can operate normally.

[0125] In this embodiment, a battery 55 is proposed that is further equipped with the above-mentioned battery thermal runaway exhaust gas treatment device, and the inlet of the exhaust gas piping 53 is connected to the explosion-proof port or explosion-proof pipe 56 of the battery shell.

[0126] As shown in Figures 25 and 26, this embodiment further proposes a battery group comprising a confluence pipe 57, a plurality of batteries 55, and the above-mentioned battery thermal runaway exhaust gas treatment device, wherein the plurality of batteries 55 are connected in parallel or in series, one end of the confluence pipe 57 is connected to the explosion-proof port or explosion-proof pipe 56 of the plurality of battery shells, and the other end is connected to the inlet of the exhaust gas piping 53; the exhaust gas piping 53 comprises an exhaust gas main pipe 531 and a plurality of exhaust gas branch pipes 532, the inlet of the exhaust gas main pipe 531 is connected to the explosion-proof port or explosion-proof pipe 56 of the plurality of battery shells via the confluence pipe 57, in other words, one end of the confluence pipe 57 is connected to the explosion-proof port of the plurality of battery shells, and the other end of the confluence pipe 57 is connected to the inlet of the exhaust gas main pipe 531, an igniter 51 is provided at each of the outlets of the plurality of exhaust gas branch pipes 532, and a sensor 522 is provided at each of the plurality of exhaust gas branch pipes 532. When thermal runaway occurs in multiple batteries 55, the explosion-proof ports or pipes 56 are opened, and the high-temperature material inside the batteries 55 enters the exhaust gas main pipe 531 and exhaust gas branch pipes 532 via the explosion-proof ports or pipes 56. At this time, if the trigger device 52 detects the thermal runaway exhaust gas, it activates the igniter 51, causing the exhaust gas from the thermal runaway of the batteries 55 to burn. To further enhance safety, a cooling device filled with coolant may be connected to the explosion-proof ports or pipes 56 of the battery shell, and the thermal runaway exhaust gas may be cooled and adsorbed before being passed through the device for combustion.

[0127] Example 17 As shown in Figures 27 to 30, the battery thermal runaway exhaust gas treatment device according to this embodiment comprises a cooling and adsorption unit 61 and an exhaust gas combustion device 62; the cooling and adsorption unit 61 includes N cans 63 connected in series in sequence, the N cans 63 being filled with a coolant and / or adsorbent to cool and / or adsorb the battery thermal runaway exhaust gas, where N is an integer of 1 or more; the exhaust gas combustion device 62 is provided at the outlet end of the Nth can 63 to burn the exhaust gas after cooling and / or adsorption has finished. In this embodiment, the arrangement and internal structure of the cans 63 are not particularly limited as long as they satisfy the needs of use, and the coolant and / or adsorbent inside the cans 63 can be partially or fully filled to satisfy different usage requirements. As the runaway battery exhaust gas passes through the cooling and adsorption chamber, the temperature and flow rate of the exhaust gas decrease. To prevent flammable components such as hydrogen gas, carbon monoxide, and methane from still being present after cooling and / or adsorption by the N cans 63 is completed, an exhaust gas combustion device 62 is provided at the outlet end of the Nth can 63 to burn the exhaust gas after cooling and / or adsorption has been completed. This consumes the flammable components in the exhaust gas, preventing flammable substances in the exhaust gas from entering the air and causing safety accidents.

[0128] The battery thermal runaway exhaust gas treatment device according to this embodiment specifically comprises a cooling and adsorption unit 61 connected to each other and an exhaust gas combustion device 62; the cooling and adsorption unit 61 includes eight cans 63, all of which may be filled with coolant, or all of which may be filled with adsorbent, or the first to fourth cans 63 may be filled with coolant and the fifth to eighth cans 63 may be filled with adsorbent, and the eight cans 63 are arranged in a linear line; the exhaust gas combustion device 62 is provided at the outlet end of the eighth can 63 for burning the exhaust gas after cooling and adsorption have been completed.

[0129] In this embodiment, adjacent canisters 63 are connected in series by elbows 64, and exhaust gas backflow buffer chambers are formed within the elbows 64. Inside each of the first to fourth canisters 63, two porous plates are provided, and the two porous plates are connected axially by connecting rods with threads at both ends, in other words, both ends of the connecting rods pass through the porous plates and are then secured with nuts, and a cooling adsorption chamber is formed by two adjacent porous plates and the inner wall of the canister 63, and ceramic balls are filled into the cooling adsorption chambers; similarly, inside each of the fifth to eighth canisters 63, two porous plates are provided, and a cooling adsorption chamber is formed by two adjacent porous plates and the inner wall of the canister 63, and activated carbon is filled into the cooling adsorption chambers. After passing through the first to fourth canisters 63, the temperature and flow rate of the runaway battery exhaust gas decrease, and immediately thereafter it enters the fifth to eighth canisters 63 where it undergoes adsorption treatment, enhancing the purification effect; at the outlet end of the eighth canister 63, an exhaust gas combustion device 62 is provided for burning the exhaust gas after cooling and adsorption have been completed, thereby preventing flammable substances such as hydrogen gas, carbon monoxide, and methane from still being present in the exhaust gas after cooling and adsorption, which could cause safety accidents.

[0130] In this embodiment, the shape of the can body 63 is not particularly limited as long as it can be filled with a coolant and / or adsorbent inside. In this embodiment, it is preferable to use a circular can body 63 with good yield strength and pressure resistance. In this embodiment, the coolant may be one or more combinations selected from honeycomb ceramic body, silica, alumina, zirconia, and titanium oxide; the adsorbent may be one or more combinations selected from graphite, alumina, montmorillonite, silicate, phosphate, and porous glass.

[0131] In this embodiment, the eighth boiler 63 is fitted with a flashback prevention unit to prevent backflow of exhaust gas; a collection unit 65 is provided between the eighth boiler 63 and the exhaust gas combustion device 62. The collection unit 65 can collect flammable components in the exhaust gas, and when the gas volume reaches a threshold, it is burned at the outlet end. On the other hand, if the threshold is not reached, the exhaust gas combustion device 62 is not activated. The collection unit 65 is increased as a protective line in front of the exhaust gas combustion device 62, thereby improving safety. In this embodiment, the exhaust gas combustion device 62 is a pulse igniter and is further equipped with an air intake port for introducing air and mixing it with the runaway exhaust gas for combustion.

[0132] Example 18 As shown in Figures 31 and 32, the battery thermal runaway exhaust gas treatment device according to this embodiment comprises a gas storage tank 71 and an ignition device 72. The gas storage tank 71 includes an air intake port 711 and an exhaust port 712 for inputting and outputting thermal runaway exhaust gas; the ignition device 72 is fixed to the outlet of the exhaust port 712 outside the gas storage tank 71 and is for burning the thermal runaway exhaust gas; the gas storage tank 71 is divided into an independent first partition chamber 731 and a second partition chamber 732 by a partition plate 77, with the air intake port 711 located in the first partition chamber 731 and the exhaust port 712 located in the second partition chamber 732; a switch module is also provided inside the gas storage tank 71, which includes an ignition switch 721 fixed inside the second partition chamber 732 and a trigger device 722 provided on the partition plate 77 and penetrating the partition plate 77. The ignition switch 721 is set up to be triggered when it comes into contact with the trigger device 722, thereby activating the ignition system. A pressure release valve 78 is provided in the partition plate 77, allowing runaway exhaust gas to enter the second partition chamber 732 from the first partition chamber 731 via the pressure release valve 78.

[0133] When the air pressure in the first partition chamber 731 rises to a first threshold P1, the runaway thermal exhaust gas enters the second partition chamber 732 via the pressure release valve 78 and then reaches the outlet via the exhaust port 712; when the air pressure in the first partition chamber 731 rises to a second threshold P2, the trigger device 722 contacts the ignition switch 721, and the ignition switch 721 activates the ignition device 72 to burn the runaway thermal exhaust gas. In this embodiment, the first threshold P1 is greater than or equal to the second threshold P2, thereby preventing the runaway thermal exhaust gas from being discharged outside the gas storage tank 71 via the pressure release valve 78 before the trigger device 722 contacts the ignition switch 721 and the ignition device 72 is activated, thus preventing air contamination and, in severe cases, the creation of a dangerous situation. When the trigger device 722, which penetrates the partition plate 77, is pushed by the air pressure and touches the ignition switch 721, the ignition device 72 is activated.

[0134] In this embodiment, the exhaust port 712 is in the form of piping, and a flow check valve 75 for controlling the flow rate of runaway thermal exhaust gas is fixed to the piping. The exhaust port 712 is provided with at least two exhaust nozzles, and multiple exhaust nozzles can equalize the pressure and burn efficiently. Multiple ignition heads are also provided in accordance with the multiple exhaust nozzles, and the number of exhaust nozzles may or may not match the number of ignition heads, and multiple ignition heads can efficiently burn the runaway thermal exhaust gas discharged from multiple exhaust ports. A support part 79 for fixedly mounting the ignition device 72 is provided on the outside of the gas storage tank 71. The ignition device 72 in this embodiment is a pulse igniter.

[0135] Example 19 As shown in Figures 31 to 33, the battery shell according to this embodiment is equipped with the above-mentioned battery thermal runaway exhaust gas treatment device, which comprises a gas storage tank 71 and an ignition device 72. The gas storage tank 71 includes an air intake port 711 and an exhaust port 712 for inputting and outputting thermal runaway exhaust gas; the ignition device 72 is fixed to the exhaust port 712 outside the gas storage tank 71 and is for burning the thermal runaway exhaust gas; the gas storage tank 71 is divided into an independent first partition chamber 731 and a second partition chamber 732 by a partition plate 77, with the air intake port 711 provided in the first partition chamber 731 and the exhaust port 712 provided in the second partition chamber 732; a switch module is also provided inside the gas storage tank 71, which includes an ignition switch 721 fixed inside the second partition chamber 732 and a trigger device 722 provided on the partition plate 77 and penetrating the partition plate 77. The ignition switch 721 is set up to be triggered when it comes into contact with the trigger device 722, thereby activating the ignition system. A pressure release valve 78 is provided in the partition plate 77, allowing runaway exhaust gas to enter the second partition chamber 732 from the first partition chamber 731 via the pressure release valve 78.

[0136] When the air pressure in the first partition chamber 731 rises to a first threshold P1, the runaway thermal exhaust gas enters the second partition chamber 732 via the pressure release valve 78 and then reaches the outlet via the exhaust port 712; when the air pressure in the first partition chamber 731 rises to a second threshold P2, the trigger device 722 strikes the ignition switch 721, and the ignition switch 721 activates the ignition device 72 to burn the runaway thermal exhaust gas. In this embodiment, the first threshold P1 is greater than or equal to the second threshold P2, thereby preventing the runaway thermal exhaust gas from being discharged outside the gas storage tank 71 via the pressure release valve 78 before the trigger device 722 strikes the ignition switch 721 and the ignition device 72 is activated, thus preventing air contamination and, in the worst case, the occurrence of a hazard. In this embodiment, the air inlet 711 extends radially to the outside of the gas storage tank 71 and has a mounting portion 713, the mounting portion 713 being a male thread for the explosion-proof port of the battery shell to be fixedly connected.

[0137] In this embodiment, a battery is proposed comprising a core, an electrode module, and the above-mentioned battery shell. In this embodiment, a battery box equipped with the above-mentioned exhaust gas treatment device is proposed. In this embodiment, a battery group comprising several of the above-mentioned batteries is proposed, the battery group comprising a confluence pipe, one end of the confluence pipe comprising several branch pipes connected in a one-to-one correspondence to the explosion-proof port, and the other end of the confluence pipe being fixedly connected to the mounting part of the thermal runaway exhaust gas treatment device. If thermal runaway occurs in the battery group, the thermal runaway exhaust gas is transported to the exhaust gas treatment device via the confluence pipe.

[0138] Example 20 As shown in Figures 34 and 35, the battery thermal runaway exhaust gas treatment device according to this embodiment comprises a gas storage tank 81 and an ignition device 82, the gas storage tank 81 including an air intake port 811 and an exhaust port 812 for inputting and outputting thermal runaway exhaust gas; the ignition device 82 is fixed to the exhaust port 812 located outside the gas storage tank 81; the gas storage tank 11 in this embodiment is a rectangular box, but may be designed in other shapes as needed. The gas storage tank 81 is divided into two independent chambers, a first partitioned chamber 831 and a second partitioned chamber 832, by a movable partition plate 87. An air intake port 811 is provided in the first partitioned chamber 831, and an exhaust port 812 is provided in the second partitioned chamber 832. A switch module is also provided in the second partitioned chamber 832, which includes an ignition switch 821. When the air pressure in the first partitioned chamber 831 rises, the movable partition plate 87 is pushed by the air pressure in the first partitioned chamber 831 and touches the ignition switch 821, activating the ignition device 82, which causes at least a portion of the exhaust port 812 to be exposed to the first partitioned chamber 831 and discharge runaway thermal exhaust gas. The second partitioned chamber 832 is provided with an elastic module 84 fixed to the movable partition plate 87 to restrict the movement of the movable partition plate 87 due to low air pressure. The movable partition plate 87 is provided with a sealing gasket to maintain airtightness between the first partition chamber 831 and the second partition chamber 832. A pipe 8121 is provided at the exhaust port 812, and at least one exhaust nozzle 8122 is provided at the pipe 8121, the number of exhaust nozzles can be adjusted as needed, and the number of ignition devices can be adjusted accordingly. A flow check valve 85 for controlling the flow rate of runaway exhaust gas is fixed to the pipe 8121. An elastic module 84 is pressed between the second partition chamber 832 and the movable partition plate 87. The gas storage tank 81 includes a mounting section 86 for fixed attachment to the battery. The ignition device 82 is a pulse igniter and is fixed to the gas storage tank 81 by a support base 88. The movable partition plate 87 is provided with a stabilizing base 871 to stabilize the movement of the movable partition plate 87.

[0139] Example 21 As shown in Figures 35 to 36, this embodiment proposes a battery shell equipped with the above-mentioned battery thermal runaway exhaust gas treatment device 810. The battery thermal runaway exhaust gas treatment device 810 is a battery thermal runaway exhaust gas treatment device according to Embodiment 20, in which a confluence pipe is connected to the battery shell via an explosion-proof port, multiple batteries are connected in parallel, and the confluence pipe is connected to the thermal runaway exhaust gas treatment device via a mounting part 86 for the thermal runaway exhaust gas treatment device. When thermal runaway occurs in any one cell in the battery group and thermal runaway exhaust gas is generated, it is discharged to the thermal runaway exhaust gas treatment device via the confluence pipe and treated, and its structure is simple, safe, small in volume, environmentally friendly and highly efficient.

[0140] Example 22 As shown in Figures 37 to 39, the battery thermal runaway exhaust gas treatment device according to this embodiment uses a gas storage tank hmm The Ku 81 is shaped like a cylinder and is divided into two independent partitioned chambers, a first and a second, by a movable partition plate. An air intake port 811 is provided in the first partitioned chamber, and an exhaust port 812 is provided in the second partitioned chamber; a switch module is also provided in the second partitioned chamber, which includes an ignition switch 821. When the air pressure in the first partitioned chamber rises, the movable partition plate is pushed by the air pressure in the first partitioned chamber and touches the ignition switch 821, activating the ignition device 82, which causes the exhaust port 812 to form a passing air passage through the air intake port 811 to discharge runaway thermal exhaust gases.

[0141] The first partition chamber is provided with an elastic module 84 fixed to a movable partition plate to restrict the movement of the movable partition plate due to low air pressure. The gas storage tank 81 includes a mounting section 86 for fixed attachment to the battery. The ignition device 82 is a pulse igniter and is fixed to the gas storage tank 81 by a support base 88. The movable partition plate 87 is provided with a base 871 and a projection 872, the projection 872 which can be inserted into the air intake port 811 to maintain the closure of the air intake port 811 under normal pressure, and the projection 872 is provided with a sealing gasket to maintain airtightness between the first and second partition chambers. The base 871 moves along the axial direction of the cylindrical body and there is a gap between it and the cylindrical body. In this embodiment, the base is rectangular, but it may be hexagonal, octagonal, or triangular, as long as there is a gap between it and the cylindrical body through which runaway thermal exhaust gas can pass. The base 871 is also provided with an ignition switch 821 having a mounting base 8221, an elastic module 84 is located between the mounting base 8211 and the base 871, and a contact block 822 is also provided near the exhaust port 812 inside the cylinder. The ignition switch 821 and the contact block 822 are collectively called a switch module, and the positions of the ignition switch and the contact block can be adjusted according to actual needs, and in this embodiment, the objective of activating the ignition device can be achieved even if the positions of the ignition switch and the contact block are swapped.

[0142] When runaway exhaust gas passes through the air intake 811, the pressure increases, causing the projection 871 to be pushed up, opening the air intake 811, and allowing the runaway exhaust gas to reach the exhaust port 812 via the cylindrical body. Simultaneously, the elastic module 84 is compressed, causing the ignition switch 821 to move upward via the mounting base 8211 and then contact the contact block 822, thereby activating the ignition device 82 and burning the runaway exhaust gas at the exhaust port 812. The gas storage tank 81 is provided with a support base 88 for fixing the ignition device 82 to the gas storage tank 81. The device is small in volume, easy to install, convenient to use, low in cost, and highly efficient.

[0143] As shown in Figure 40, this embodiment further proposes a battery shell equipped with a battery thermal runaway exhaust gas treatment device. A confluence pipe is connected to the battery shell via an explosion-proof port, multiple batteries are connected in parallel, and the confluence pipe is connected to the thermal runaway exhaust gas treatment device via a mounting section for the thermal runaway exhaust gas treatment device. When thermal runaway occurs in any one cell in the battery group and thermal runaway exhaust gas is generated, it is discharged to the thermal runaway exhaust gas treatment device via the confluence pipe and treated. The structure is simple, safe, small in volume, environmentally friendly, and highly efficient. This embodiment further proposes a battery group equipped with the above-mentioned battery thermal runaway exhaust gas treatment device, particularly a high-capacity battery. This embodiment further proposes a battery box equipped with the above-mentioned battery thermal runaway exhaust gas treatment device.

[0144] Example 23 As shown in Figures 41 to 43, the battery thermal runaway exhaust gas treatment device according to this embodiment comprises an exhaust gas combustion device and an alarm module 94; the exhaust gas combustion device comprises an exhaust pipe 91, an ignition device 93, and a trigger device 92; the trigger device 92 is provided in the exhaust pipe 91 to activate the ignition device 93 when the thermal runaway exhaust gas passes through the exhaust pipe 91; the ignition device 93 is provided at the outlet end of the exhaust pipe 91 to burn the thermal runaway exhaust gas discharged from the exhaust pipe 91; and the alarm module 94 emits an alarm signal when the ignition device 93 is activated. According to this battery thermal runaway exhaust gas treatment device, when a battery thermal runaway occurs, the exhaust gas caused by the thermal runaway can be burned, air pollution caused by the thermal runaway exhaust gas is avoided, and dangerous incidents such as explosions and fires caused by the thermal runaway exhaust gas accumulating in the lithium battery are also avoided, thereby greatly improving the safety of the battery. The alarm module 94 emits an alarm signal when the ignition device 93 is activated, providing a warning so that the operator can deal with the overheated battery in a timely manner. At the same time, it can accurately locate the overheated battery, allowing the operator to deal with it accurately and in a timely manner. Furthermore, the device according to this invention has a simple structure, is easy to install, and can be assembled using existing equipment.

[0145] The exhaust pipe 91 according to this application may be one or more, and if there are multiple, a multi-pipe structure is used, specifically for example, including a first exhaust pipe 911 and a second exhaust pipe 912; there are multiple second exhaust pipes 912, trigger devices 92 and ignition devices 93; the inlets of the multiple second exhaust pipes 912 are all connected to the outlets of the first exhaust pipe 911; the multiple ignition devices 93 are provided at the outlets of the second exhaust pipes 912; and the multiple trigger devices 92 are provided in a one-to-one correspondence with the multiple second exhaust pipes 912. At the same time, the exhaust pipe 91 or the first exhaust pipe 911 is provided with a flashback prevention device 96, which may be a flashback prevention valve, to prevent runaway exhaust gas in the exhaust pipe 91 or the first exhaust pipe 911 from backflowing while burning. When actually installing and using the system, the number of second exhaust pipes 912 and ignition devices 93 can be arranged according to the number of batteries and needs, and can be arranged in the order of two, three, or four, etc. When two or more are arranged, the reliability of combustion can be ensured, and if one ignition device 93 fails or malfunctions, the other ignition devices 93 can operate normally.

[0146] The trigger device 92 described above is specifically an ignition switch, and the ignition switch is one of either a pressure switch or a magnetic switch. Regarding the magnetic switch, it can be configured in various ways, as long as the ignition device 93 is activated when the runaway exhaust gas passes through, for example, it can be a mechanical magnetic switch, a gravity magnetic switch, or a magnetic magnetic switch. Regarding the ignition device 93 described above, it can be configured in various ways, for example, a pulse igniter can be used, and as the power supply method for the pulse igniter, dry cell batteries or AC power can be used depending on the site environment.

[0147] The alarm module 94 described above can be configured in various ways, and may be an integrated or combined type. For example, an audio alarm device and / or a light alarm device can be used, the audio alarm device being a buzzer, and the light alarm device being a flashing light, which may be a red or yellow flashing light. The alarm module 94 can be activated synchronously with the ignition device 93 when it is activated, and can emit an alarm signal after activation. In other words, the alarm module 94 can be activated by the trigger device 92, and may be manually closed after activation or closed by the control system of a higher-level controller, or may be passively closed after the ignition of the ignition device 93 is completed. Furthermore, the exhaust pipe 91 or the second exhaust pipe 912 is provided with a top cover 95, which is hinged to the exhaust pipe 91 or the second exhaust pipe 912 and can be opened by airflow when runaway exhaust gas passes through. When the top cover 95 is not opened, it provides a waterproofing effect, preventing external impurities and water vapor from entering the exhaust pipe 91. According to the alarm module 94, real-time monitoring is possible, and changes in battery pressure due to thermal runaway can be monitored in a timely manner, providing timely warnings. It can also monitor and issue alarm signals even in the early stages of battery thermal runaway. Because the alarm module 94 enables timely monitoring and alarms, it not only effectively reduces personnel injuries and fatalities but also prevents secondary safety accidents caused by other batteries overheating and experiencing thermal runaway, further reducing property losses.

[0148] In this embodiment, the exhaust pipe 91 or the second exhaust pipe 912 may be provided with a sealing plug, which is located at the outlet of the exhaust pipe 91 or the second exhaust pipe 912 and can be pushed up or ejected when runaway thermal exhaust gas passes through. Alternatively, the exhaust pipe 91 or the second exhaust pipe 912 may be provided with a top cover 95, which is hinged to the exhaust pipe 91 or the second exhaust pipe 912 and can be opened when runaway thermal exhaust gas passes through, thereby providing a waterproofing effect.

[0149] Example 24 As shown in Figure 44, the battery according to this embodiment comprises at least one single cell 1, an explosion-proof mechanism 2, a confluence pipe 3, and an ignition device 4; the explosion-proof mechanism 2 is fixed to the single cell 1 and is for releasing the runaway thermal exhaust gas generated when the single cell experiences thermal runaway; one end of the confluence pipe 3 is fixedly connected to the explosion-proof mechanism 2 and is for transporting the runaway thermal exhaust gas; the ignition device 4 is fixedly connected to the other end of the confluence pipe 3 and is for burning the runaway thermal exhaust gas transported from the confluence pipe 3. The ignition device 4 is a pulse igniter. The ignition device 4 further includes an air intake for introducing air and mixing it with the runaway thermal exhaust gas. If the number of single cells is greater than one, the confluence pipe 3 is connected in parallel with the single cells.

[0150] In this embodiment, multiple single cells 1 are arranged in parallel to form a lithium-ion battery, and the ignition device 4 is preferably provided separately from the single cells 1. This prevents damage to the single cells 1 due to the combustion of thermal runaway exhaust gas during ignition. The thermal runaway exhaust gas generated during thermal runaway of a single cell contains, but is not limited to, flammable gases such as hydrogen gas, carbon monoxide, and methane. Therefore, the junction pipe 3 is made of a material that is resistant to high temperatures, high pressures, and corrosion.

[0151] Regarding the exhaust port of the explosion-proof mechanism 2 described above, it can be configured in a fixed direction so that only the transport of runaway thermal exhaust gas from inside the cell 1 to the confluence pipe 3 is possible, and transport from the confluence pipe 3 to the cell 1 is not possible. When the runaway thermal exhaust gas generated in the cell 1 reaches a predetermined threshold, it is detonated and released along the fixed direction, and an explosion-proof mechanism 2 is provided for each cell, so if any one cell experiences a runaway thermal event and generates runaway thermal exhaust gas, it enters the confluence pipe 3 via the explosion-proof mechanism 2, while the other cells 1 continue to operate normally.

[0152] As shown in Figure 45, in this embodiment, the ignition device 4 is equipped with an igniter 8 and an air intake 9. After the runaway exhaust gas is transported from the confluence pipe 3 to the ignition device 4, the runaway exhaust gas is ejected, air enters through the air intake 9 and mixes with the runaway exhaust gas, and the mixture of runaway exhaust gas and air is burned by the igniter 8, rendering the runaway exhaust gas harmless. This is convenient, simple, and effective, and can avoid the occurrence of fire and environmental pollution. The igniter 8 may be a pulse igniter or an electric igniter controlled by a battery management system.

[0153] Example 25 As shown in Figure 46, the battery according to this embodiment comprises at least one single cell 1, a confluence pipe 3, an ignition device 4, and an explosion-proof mechanism 2. In addition to the features of Embodiment 24, the confluence pipe 3 is provided with a flashback arrestor 5 located ahead of the ignition device 4 to prevent runaway thermal exhaust gas from entering the confluence pipe 3 in the reverse direction after combustion; the ignition device 4 is fixedly connected to the other end of the confluence pipe 3 and is for igniting the runaway thermal exhaust gas transported from the confluence pipe 3; the ignition device 4 is a pulse igniter. The ignition device 4 further includes an air intake for introducing air and mixing it with the runaway thermal exhaust gas. If the number of single cells is greater than one, the confluence pipe 3 is connected in parallel with the single cells.

[0154] Example 26 As shown in Figures 46 and 47, the battery according to this embodiment comprises at least one single cell 1, a confluence pipe 3, an ignition device 4, and an explosion-proof mechanism 2; the explosion-proof mechanism 2 is fixed to the single cell 1 and is for releasing runaway thermal exhaust gas generated when the single cell experiences thermal runaway; one end of the confluence pipe 3 is fixedly connected to the explosion-proof mechanism 2 and is for transporting the runaway thermal exhaust gas; the confluence pipe 3 is equipped with a flashback arrestor to prevent the runaway thermal exhaust gas from entering the confluence pipe 3 in the reverse direction after combustion. 5 is fixedly installed; the ignition device 4 is fixedly connected to the other end of the confluence pipe 3 and is for burning the runaway thermal exhaust gas transported from the confluence pipe 3; a buffer device 6 is also fixed forward of the flashback prevention device 5, and the buffer device includes a pressure release valve 10, and the opening pressure of the pressure release valve 10 is less than the opening pressure of the battery explosion-proof valve, and after the runaway thermal exhaust gas has collected in the buffer device 6 via the confluence pipe and reached a predetermined pressure, the pressure release valve 10 opens, and the runaway thermal exhaust gas passes through the pressure release valve and reaches the ignition device 4. The ignition device 4 is a pulse igniter. The ignition device 4 further includes an air intake for introducing air and mixing it with the runaway thermal exhaust gas. If the number of cells is greater than 1, the confluence pipe 3 is connected in parallel with the cells.

[0155] In this embodiment, multiple single cells 1 are arranged in parallel to form a lithium-ion battery, and the ignition device 4 is provided separately from the single cells 1, thereby preventing damage to the single cells 1 due to the combustion of runaway thermal exhaust gas during ignition. In this embodiment, the buffer device 6 is an elastic bag or a pressure vessel, and since it can apply a certain pressure, it is possible to avoid a situation where the concentration of runaway thermal exhaust gas is too low and it reaches the ignition device 4 but cannot burn. The runaway thermal exhaust gas generated during thermal runaway of a single cell contains, but is not limited to, flammable gases such as hydrogen gas, carbon monoxide, and methane, and therefore the confluence pipe 3 is made of a material that is resistant to high temperatures, high pressures, and corrosion.

[0156] Example 27 As shown in Figure 48, the battery pack according to this embodiment comprises a box body 7 and several lithium-ion batteries arranged in series or parallel inside the box body 7; it also includes an explosion-proof mechanism 2, which is often a pressure valve or a connecting pipe, fixed to the box body 7, and for releasing thermal runaway exhaust gas generated when the batteries overheat; a confluence pipe 3 is fixedly connected at one end to the explosion-proof mechanism 2 and for transporting the thermal runaway exhaust gas; an ignition device 4 is fixedly connected to the other end of the confluence pipe 3 and for burning the thermal runaway exhaust gas transported from the confluence pipe 3; the ignition device 4 is a pulse igniter. The ignition device 4 further includes an air intake for introducing air and mixing it with the thermal runaway exhaust gas.

[0157] In this embodiment, the ignition device 4 is provided separately from the box body 7, thereby preventing damage to the battery due to the combustion of runaway thermal exhaust gas during ignition. The runaway thermal exhaust gas generated during thermal runaway of the battery contains, but is not limited to, flammable gases such as hydrogen gas, carbon monoxide, and methane; therefore, the confluence pipe 3 is made of a material that is resistant to high temperatures, high pressures, and corrosion. The vent of the explosion-proof mechanism 2 can be configured to allow only the transport of runaway thermal exhaust gas from inside the box body 7 to the confluence pipe 3, and not from the confluence pipe 3 to the box body 7, in a fixed direction. When the runaway thermal exhaust gas generated in the box body 7 reaches a predetermined threshold, it is detonated and released along the fixed direction.

[0158] As shown in Figure 45, in this embodiment, the ignition device 4 is equipped with an igniter 8 and an air intake 9. After the runaway exhaust gas is transported from the confluence pipe 3 to the ignition device 4, the runaway exhaust gas is ejected, air enters through the air intake 9 and mixes with the runaway exhaust gas, and the mixture of runaway exhaust gas and air is burned by the igniter, rendering the runaway exhaust gas harmless. This is convenient, simple, and effective, and can avoid the occurrence of fires and environmental pollution.

[0159] Example 28 As shown in Figure 49, the battery pack according to this embodiment comprises a box body 7 and several lithium-ion batteries arranged in series or parallel within the box body 7; it also includes an explosion-proof mechanism 2, which is often a pressure valve or a connecting pipe, fixed to the box body 7, for releasing runaway thermal exhaust gas generated when the batteries overheat; a confluence pipe 3 is fixedly connected at one end to the explosion-proof mechanism 2 and for transporting the runaway thermal exhaust gas; a flashback arrestor 5 is fixed to the confluence pipe 3 to prevent the runaway thermal exhaust gas from entering the confluence pipe 3 in the reverse direction after combustion; an ignition device 4 is fixedly connected to the other end of the confluence pipe 3 and for burning the runaway thermal exhaust gas transported from the confluence pipe 3; the ignition device 4 is a pulse igniter. The ignition device 4 further includes an air intake for introducing air and mixing it with the runaway thermal exhaust gas. If the number of battery packs is greater than one, the confluence pipe 3 is connected in parallel with the battery packs.

[0160] In this embodiment, the ignition device 4 is provided separately from the box body 7, thereby preventing damage to the battery due to the combustion of runaway thermal exhaust gas during ignition. The runaway thermal exhaust gas generated during thermal runaway of the battery contains, but is not limited to, flammable gases such as hydrogen gas, carbon monoxide, and methane; therefore, the confluence pipe 3 is made of a material that is resistant to high temperatures, high pressures, and corrosion. The vent of the explosion-proof mechanism 2 can be configured to allow only the transport of runaway thermal exhaust gas from inside the box body 7 to the confluence pipe 3, and not from the confluence pipe 3 to the box body 7, in a fixed direction. When the runaway thermal exhaust gas generated in the box body 7 reaches a predetermined threshold, it is detonated and released along the fixed direction.

[0161] Example 29 As shown in Figure 50, the battery pack according to this embodiment comprises a box body 7 and several lithium-ion batteries arranged in series or parallel inside the box body 7; it also includes an explosion-proof mechanism 2, which is often a pressure valve or a connecting pipe, fixed to the box body 7, and for releasing thermal runaway exhaust gas generated when the batteries overheat; one end of the confluence pipe 3 is fixedly connected to the explosion-proof mechanism 2 and for transporting the thermal runaway exhaust gas; after the thermal runaway exhaust gas burns in the confluence pipe 3 A flashback arrestor 5 is fixed to the confluence pipe 3 to prevent the exhaust gases from entering in the reverse direction; an ignition device 4 is fixedly connected to the other end of the confluence pipe 3 to burn the runaway thermal exhaust gases transported from the confluence pipe 3; a buffer device 6 is also fixed ahead of the flashback arrestor 5, and the buffer device includes a pressure release valve 10. After the runaway thermal exhaust gases have passed through the confluence pipe 3 and reached the buffer device 6, once a predetermined pressure is reached, the pressure release valve 10 opens, and the runaway thermal exhaust gases pass through the pressure release valve to reach the ignition device 4. The ignition device 4 is a pulse igniter or another electric igniter. The ignition device 4 further includes an air intake for introducing air and mixing it with the runaway thermal exhaust gases. If the number of battery packs is greater than one, the confluence pipe 3 is connected in parallel with the battery packs.

[0162] In this embodiment, the ignition device 4 is provided separately from the box body 7, thereby preventing damage to the battery due to the combustion of runaway thermal exhaust gas during ignition. The buffer device 6 is an elastic bag or pressure vessel and can apply a constant pressure, thus preventing the runaway thermal exhaust gas from reaching the ignition device 4 but failing to burn due to its low concentration. The runaway thermal exhaust gas generated during thermal runaway of the battery contains, but is not limited to, flammable gases such as hydrogen gas, carbon monoxide, and methane; therefore, the confluence pipe 3 is made of a material resistant to high temperatures, high pressures, and corrosion. Regarding the vent of the explosion-proof mechanism 2, it can be configured to allow only the transport of runaway thermal exhaust gas from inside the box body 7 to the confluence pipe 3, and not from the confluence pipe 3 to the box body 7, in a fixed direction. When the runaway thermal exhaust gas generated in the box body 7 reaches a predetermined threshold, it is detonated and released along the fixed direction. [Explanation of symbols]

[0163] 11-Lithium battery or PACK box, 12-Pressure release valve, 13-Combustion box; 131-Flame-retardant insulation plate, 14-Long sliding rod, 15-Exhaust gas combustion device, 151-Pressure switch, 16-Trigger block, 161-Bottom end face, 162-Arch groove, 163-Through hole, 164-Push-up block, 17-Limiting block, 18-Mounting frame, 181-Lock, 19-Return spring, 21-Battery shell, 211-Explosion-proof port, 24-Exhaust gas treatment device, 241-Exhaust pipe, 242-Exhaust nozzle, 243-Ignition switch, 244-Ignition device, 245-Pressure valve, 2451-Seal Gasket, 2452-Protrusion, 246-Flashback prevention valve, 247-Fixing cylinder, 248-Mounting part, 249-Support base, 31-First exhaust pipe, 32-Second exhaust pipe, 33-Ignition device, 34-Magnetic switch, 35-Exhaust nozzle, 36-Flashback prevention valve, 37-Holder, 38-Power box, 39-Waterproof connector, 331-Ignition head, 332-Signal wire, 341-Sensing element, 342-Magnetic valve core, 41-Thermal runaway exhaust gas discharge pipe, 42-Combustion chamber, 43-Pulse igniter, 44-Power supply, 45-Air intake, 46-Windproof cover, 47-Air vent, 48-Flashback prevention device, 49-Pressure switch, 4 10- Explosion-proof device, 411- Explosion-proof membrane, 412- Temperature control switch, 51- Ignition device, 52- Trigger device, 53- Exhaust gas piping, 54- Three-way pipe, 55- Battery, 56- Explosion-proof port or pipe, 57- Confluence pipe, 511- Arch igniter, 512- Resistance wire igniter, 5111- Ignition shell, 5112- First electrode wire, 5113- Second electrode wire, 5114- Ignition chamber, 5115- Ionization gap, 5116- Ceramic retaining ring, 5117- Ceramic retaining ring, 5118- Boost coil, 5121- Resistance wire, 521- Control circuit board, 522- Sensor, 531- Exhaust Gas main pipe, 532 - Exhaust gas branch pipe, 61 - Cooling adsorption unit, 62 - Exhaust gas combustion device, 63 - Boiler body, 64 - Elbow, 65 - Collection unit, 71 - Gas storage tank, 72 - Ignition device, 75 - Flow check valve, 77 - Partition plate, 78 - Pressure release valve, 79 - Support part, 713 - Mounting part, 711 - Air intake, 712 - Exhaust port, 721 - Ignition switch, 722 - Trigger device, 731 - First partition chamber, 732 - Second partition chamber, 81 - Gas storage tank, 82 - Ignition device, 84 - Elastic module, 85 - Flow check valve, 86 - Mounting part, 87 - Movable partition plate, 88 - Support base,811-Air intake, 812-Exhaust port, 821-Ignition switch, 831-First partition chamber, 832-Second partition chamber, 871-Stabilizing base, 8121-Piping, 8122-Exhaust nozzle, 810-Battery thermal runaway exhaust gas treatment device, 8211-Mounting base, 822-Contact block, 871-Protrusion, 872-Base, 91-Exhaust pipe, 92-Trigger device, 93-Ignition device, 94-Alarm module, 95-Top cover, 96-Flashback arrestor, 97-Ignition head, 98-Holder, 99-Power box, 910-Circuit board, 911-First exhaust pipe, 912-Second exhaust pipe, 1-Single battery, 2-Explosion-proof mechanism, 3-Merging pipe, 4-Ignition device, 5-Flashback arrestor, 6-Breaker, 7-Box body, 8-Ignition device, 9-Air intake, 10-Pressure release valve.

Claims

1. A treatment device for exhaust gases from battery thermal runaway, A battery thermal runaway exhaust gas treatment device is provided at the exhaust gas outlet end of a lithium battery or PACK box and comprises an exhaust gas combustion device for burning thermal runaway exhaust gas discharged due to thermal runaway of the lithium battery or PACK box, the exhaust gas combustion device comprising a pulse igniter.

2. The battery thermal runaway exhaust gas treatment device according to claim 1, further comprising a trigger device for triggering ignition by an exhaust gas combustion device based on the pressure of thermal runaway exhaust gas discharged from the exhaust gas outlet end of a lithium battery or PACK box.

3. The exhaust gas combustion device and the trigger device are both located in the combustion chamber outside the exhaust gas outlet end of the lithium battery or PACK box, the trigger device is positioned opposite the exhaust gas outlet end, and the exhaust gas combustion device is positioned above the trigger device. The treatment device for battery thermal runaway exhaust gas according to claim 2, characterized in that the combustion chamber is an inner chamber of a combustion box, and the combustion box is fixedly connected to a lithium battery or a PACK box.

4. The battery thermal runaway exhaust gas treatment device according to claim 2, characterized in that the trigger device comprises a pressure plug provided at the exhaust gas outlet end of the lithium battery or PACK box.

5. The trigger device comprises a vertical sliding rod and a trigger block, both of which are located inside the combustion box, and the vertical sliding rod is fixedly connected to a lithium battery or a PACK box. The trigger block is provided around the outer circumference of the vertical sliding rod and is slidably connected to the vertical sliding rod. The battery thermal runaway exhaust gas treatment device according to claim 3, characterized in that the trigger block is provided so as to face the exhaust gas outlet end of the lithium battery or PACK box, and the exhaust gas combustion device is provided above the trigger block.

6. The battery thermal runaway exhaust gas treatment device according to claim 5, characterized in that the lower end surface of the trigger block is an inwardly recessed arc shape, and the arc shape is provided so as to face the exhaust gas outlet end of the lithium battery or PACK box, the trigger block is made of fire-resistant material, an arc shape groove is provided at the bottom of the trigger block, and the arc shape groove is provided so as to face the exhaust gas outlet end of the lithium battery or PACK box.

7. The trigger device further comprises a limiting block fixedly connected to the uppermost part of the vertical sliding rod, and an elastic return member. The treatment device for battery thermal runaway exhaust gas according to claim 6, characterized in that the limiting block is connected to the trigger block via an elastic return member and is fixedly connected to the exhaust gas combustion device via a mounting frame.

8. The treatment device for battery thermal runaway exhaust gas according to claim 7, characterized in that a push switch is provided at the bottom of the exhaust gas combustion device, the push switch is positioned opposite to a trigger block, and a push-up block is provided at the top of the trigger block, the push-up block is positioned opposite to the push switch.

9. The battery thermal runaway exhaust gas treatment device according to claim 8, further comprising a flame-retardant heat insulating plate, wherein the combustion box and the vertical sliding rod are both fixedly connected to the lithium battery or PACK box via the flame-retardant heat insulating plate, a communication hole is provided in the flame-retardant heat insulating plate, the combustion box communicates with the exhaust gas outlet end via the communication hole in the flame-retardant heat insulating plate, a pressure release module is provided at the exhaust gas outlet end that penetrates the flame-retardant heat insulating plate and extends into the combustion chamber of the combustion box, and the uppermost part of the combustion box is open.

10. It is a battery pack, The system comprises a box body, an explosion-proof mechanism, a confluence pipe, a battery thermal runaway exhaust gas treatment device, and several lithium-ion batteries located inside the box body. The explosion-proof mechanism is fixed to the box body and is for releasing thermal runaway exhaust gases generated when the lithium-ion battery experiences thermal runaway. The aforementioned merging pipe is fixedly connected to the explosion-proof mechanism and is for transporting the runaway thermal exhaust gas. The battery pack is characterized in that the battery thermal runaway exhaust gas treatment device is fixedly connected to the confluence pipe and burns the thermal runaway exhaust gas transported from the confluence pipe, and the battery thermal runaway exhaust gas treatment device includes an exhaust gas combustion device.

11. The exhaust gas combustion apparatus comprises an exhaust pipe, several exhaust nozzles, a pressure valve, an ignition switch, and an ignition device, with each of the several exhaust nozzles being fixedly connected to the exhaust pipe to form an exhaust passage for runaway thermal exhaust gas. The pressure valve and the ignition switch are provided within the exhaust passage, the pressure valve is equipped with a piston, and the exhaust passage is sealed by the pressure valve at normal pressure and maintained in a closed state. The piston inside the pressure valve is pushed and moved by air pressure, the exhaust passage is opened, and at the same time the pressure valve comes into contact with the ignition switch and activates the ignition device. The battery pack according to claim 10, characterized in that when thermal runaway exhaust gas is generated in the battery, as the air pressure gradually increases, a small piston in the pressure valve is sequentially pushed, the ignition switch is sequentially turned on, the ignition device is activated, and the thermal runaway exhaust gas is burned.

12. The battery pack according to claim 11, characterized in that a flashback prevention valve is provided inside the exhaust pipe and a sealing gasket is provided in the pressure valve.

13. The battery pack according to claim 11, characterized in that the exhaust pipe and the exhaust nozzle are fixed to a fixed cylinder to form a gas passage, so that the runaway thermal exhaust gas passes through the exhaust pipe, the fixed cylinder, and the exhaust nozzle in that order.

14. The battery pack according to claim 11, characterized in that the pressure valve is fixedly installed within the connection point with the exhaust nozzle of the fixed cylinder, the pressure valve is provided with a projection, the ignition switch is provided inside the exhaust nozzle, and when the piston of the pressure valve moves and the projection comes into contact with the ignition switch, the ignition device is activated.

15. The battery pack according to claim 11, characterized in that the ignition device is a pulse igniter.

16. The exhaust gas combustion apparatus comprises a first exhaust pipe, a second exhaust pipe, an ignition device, and a magnetic switch, wherein N units of the second exhaust pipe, magnetic switch, and ignition device are provided, where N is an integer of 1 or more, and the inlets of the N second exhaust pipes are all connected to the outlets of the first exhaust pipe. The battery pack according to claim 10, characterized in that N ignition devices are provided at the outlet of the second exhaust pipe for burning runaway thermal exhaust gas discharged from the second exhaust pipe, and N magnetic switches are provided in one-to-one correspondence with the N second exhaust pipes for activating the ignition devices by transmitting an electrical signal to the ignition devices when the runaway thermal exhaust gas passes through the second exhaust pipe, thereby burning the runaway thermal exhaust gas.

17. The battery pack according to claim 16, characterized in that the magnetic switch is one selected from a mechanical magnetic switch, a gravity-type magnetic switch, or a magnetic-type magnetic switch, and the magnetic switch is a normally closed switch.

18. The battery pack according to claim 16, further comprising N exhaust nozzles having a tapered pipe structure, wherein the large ends of the N exhaust nozzles are connected in a one-to-one correspondence to the outlets of N second exhaust pipes, and N ignition devices are provided in a one-to-one correspondence to the small end outlets of the N exhaust nozzles.

19. The first exhaust pipe is provided with a flashback prevention valve to prevent backflow of runaway exhaust gas, and the flashback prevention valve is a one-way valve. The ignition device is a pulse igniter, and the pulse igniter is characterized in that the ignition head is provided on the second exhaust pipe via a holder, the battery or AC power interface is provided in the power box, and the signal wire is sealed and connected to the power box via a waterproof connector, as described in claim 16.

20. The battery pack according to claim 10, wherein the exhaust gas combustion device comprises a combustion chamber, an ignition device, and a trigger device, wherein the ignition device is located in the combustion chamber, the combustion chamber is for storing runaway thermal exhaust gas generated when the battery overheats, and the trigger device is connected to the ignition device and triggers the ignition device to burn the runaway thermal exhaust gas based on the pressure and / or temperature of the runaway thermal exhaust gas.

21. The battery pack according to claim 20, characterized in that the trigger device is a pressure switch and / or a temperature control switch, or an electrical contact pressure gauge.

22. The combustion chamber is further equipped with a thermal runaway exhaust gas discharge pipe, and the combustion chamber is connected to the electrolyte chamber of the battery via the thermal runaway exhaust gas discharge pipe, and an explosion-proof device is provided inside the thermal runaway exhaust gas discharge pipe. If the trigger device is a pressure switch and / or a temperature control switch, the pressure switch and / or temperature control switch are provided between the explosion-proof device and the combustion chamber, and the pressure switch and the temperature control switch are connected in parallel or in series. The battery pack according to claim 21, characterized in that, when the trigger device is an electrical contact pressure gauge, the electrical contact pressure gauge is provided between the electrolyte chamber and the combustion chamber of the battery, and the contact pressure of the electrical contact pressure gauge is less than the explosion-proof pressure of the explosion-proof device.

23. The battery pack according to claim 22, wherein the ignition device comprises an igniter disposed inside the combustion chamber and a power supply provided inside or outside the combustion chamber, the power supply being electrically connected to the igniter and a trigger device, and the trigger device being electrically connected to the igniter.

24. The battery pack according to claim 23, further comprising a flashback prevention device provided between the thermal runaway exhaust gas discharge pipe and the combustion chamber, and a windproof cover provided at the top of the combustion chamber, wherein the chamber wall of the combustion chamber is provided with an air intake port for supplying combustion-supporting gas into the combustion chamber and an air vent for releasing gas remaining after combustion.

25. The exhaust gas combustion device comprises an igniter, a trigger device, and exhaust gas piping. The trigger device comprises a control circuit board and a sensor, the sensor being mounted on the exhaust gas piping or battery shell, the output terminal of the sensor being connected to the control circuit board, and configured to output a signal to the control circuit board when the battery overheats, after which the control circuit board outputs an ignition current in response to the signal. The battery pack according to claim 10, characterized in that the ignition device is an arc ignition device or a resistance wire ignition device, is installed in the exhaust gas piping, and can burn the runaway exhaust gas discharged from the exhaust gas piping by an ignition current output from the control circuit board.

26. The igniter is a resistance wire igniter, The aforementioned resistance wire igniter comprises an igniter shell and a resistance wire, The battery pack according to claim 25, characterized in that an ignition chamber communicating with an exhaust gas pipe is provided inside the ignition shell, the resistance wire is provided inside the ignition chamber, and both ends of the resistance wire are connected to a control circuit board located outside the ignition shell.

27. ​​The igniter is an arc igniter, The arc igniter comprises an igniter shell, a first electrode wire, and a second electrode wire. The battery pack according to claim 25, characterized in that an ignition chamber communicating with an exhaust gas pipe is provided inside the igniter shell, one end of the first electrode wire and one end of the second electrode wire are provided inside the ignition chamber and an ionization gap is provided between them, and the other ends of the first electrode wire and the second electrode wire are provided outside the igniter shell and connected to a control circuit board.

28. The battery pack according to claim 26, wherein the resistance wire igniter further comprises a ceramic retaining ring and a ceramic retaining ring, wherein a ring groove is provided inside the ceramic retaining ring, and the resistance wire is provided inside the ring groove and firmly pressed by the ceramic retaining ring.

29. The battery pack according to claim 27, wherein the arc igniter further comprises a ceramic retaining ring and a ceramic retaining ring, wherein a ring groove is provided inside the ceramic retaining ring, and the first electrode wire or the second electrode wire is provided inside the ring groove and firmly pressed by the ceramic retaining ring.

30. The battery pack according to claim 29, wherein the control circuit board is provided with an oscillation circuit for converting DC power to AC power, and a boost coil is provided between the arc igniter and the control circuit board for boosting the AC power output from the control circuit board and transporting it to the first electrode wire and the second electrode wire.

31. The battery pack according to claim 30, characterized in that the trigger device includes at least one selected from a pressure sensor, a gas sensor, or a temperature sensor.

32. It is further equipped with a cooling adsorption unit, The cooling and adsorption unit includes N cans connected sequentially in series, each of which is filled with a coolant and / or adsorbent to cool and / or adsorb the exhaust gas from battery thermal runaway, where N is an integer of 1 or more. The battery pack according to claim 10, characterized in that the exhaust gas combustion device is provided at the outlet end of the Nth can body and is for burning the runaway exhaust gas after cooling and / or adsorption has been completed.

33. The battery pack according to claim 32, characterized in that the N cans are arranged in a linear line or in a linear U-shape, V-shape, or L-shape, each can is provided with X porous plates, a cooling and adsorption chamber is formed by two adjacent porous plates and the inner wall of the can, the cooling material and / or adsorbent is filled in part or all of the cooling and adsorption chamber, X is an integer of 2 or more, and adjacent porous plates are connected axially by connecting rods.

34. Adjacent canisters are connected in series by elbows or hoses, and a backflow buffer chamber is formed inside the elbow for the passage of runaway exhaust gas due to battery heat, a flashback prevention unit is fixed to the Nth canister, and a collection unit is provided between the Nth canister and the exhaust gas combustion device. The battery pack according to claim 33, wherein the exhaust gas combustion device includes a pulse igniter and further comprises an air intake for introducing air and mixing it with runaway exhaust gas for combustion.

35. The gas storage tank is further provided, and within the gas storage tank there is a partition plate for dividing the gas storage tank into a closed first partition chamber and a second partition chamber, the first partition chamber is provided with an air supply pipe for allowing runaway thermal exhaust gas to enter the first partition chamber, and the second partition chamber is provided with an exhaust pipe for discharging runaway thermal exhaust gas. The exhaust gas combustion device comprises an ignition device, a trigger device, and an ignition switch, wherein the ignition device is provided at the outlet of the exhaust pipe. A pressure release valve is provided in the partition plate, so that runaway thermal exhaust gas enters the second partition chamber from the first partition chamber via the pressure release valve. The trigger device and ignition switch are provided in the gas storage tank, the trigger device is provided so as to penetrate the partition plate and is movable by air pressure, and the ignition switch is provided in the second partition chamber and can be activated by being triggered by the trigger device. The air pressure in the first partition chamber rises and the first threshold P １ When the pressure in the first partition chamber reaches the second threshold P, the runaway exhaust gas enters the second partition chamber via the pressure release valve and then reaches the outlet via the exhaust pipe. ２ When it reaches the first threshold P, the trigger device contacts the ignition switch, the ignition switch activates the ignition device, and the runaway exhaust gas burns, １ The value of the second threshold P ２ The battery pack according to claim 10, characterized in that the value is greater than or equal to [value].

36. The battery pack according to claim 35, characterized in that the partition plate is provided with a sealing gasket to maintain the airtightness of the first partition chamber and the second partition chamber, a flow check valve for controlling the flow rate of runaway exhaust gas is provided at the outlet of the exhaust pipe, and the ignition device is a pulse igniter.

37. The battery pack according to claim 36, wherein the exhaust pipe is provided with at least two exhaust nozzles, the ignition device includes at least two ignition heads, and a support base for mounting the ignition device is provided outside the gas storage tank.

38. The system further includes a gas storage tank, the gas storage tank is equipped with an air intake and exhaust port for inputting and outputting runaway thermal exhaust gas, and the exhaust gas combustion device is fixed to the exhaust port located outside the gas storage tank. The gas storage tank is divided into a first partitioned chamber and a second partitioned chamber by a movable partition plate, the air intake is provided in the first partitioned chamber, the exhaust is provided in the second partitioned chamber, a switch module is provided in the second partitioned chamber, and the switch module includes an ignition switch. The battery pack according to claim 10, characterized in that when the air pressure in the first partition chamber rises, the movable partition plate is pushed by the air pressure in the first partition chamber and comes into contact with the ignition switch, the ignition device is activated, and at least a portion of the exhaust port is exposed to the first partition chamber to discharge the runaway thermal exhaust gas.

39. The first partition chamber and / or the second partition chamber are provided with an elastic module pressed between the first partition chamber and / or the second partition chamber and the movable partition plate, and the movable partition plate is provided with a sealing gasket to maintain the airtightness of the first partition chamber and the second partition chamber. The exhaust port is in the form of a pipe, and the pipe is equipped with a flow check valve for controlling the flow rate of runaway exhaust gas. The battery pack according to claim 38, characterized in that the ignition device is a pulse igniter.

40. The gas storage tank is in the form of a cylindrical body, the movable partition plate is provided with a base and a projection, the projection can be inserted into the air intake port to maintain the closure of the air intake port under normal pressure, the base moves along the axial direction of the cylindrical body, and there is a gap between the base and the cylindrical body for the thermal runaway exhaust gas to pass through. The battery pack according to claim 39, wherein the base is provided with the switch module, and when the runaway thermal exhaust gas passes through the air intake port, the pressure increases, causing the projection to be pushed up, the switch module to come into contact with it, and the ignition device to activate and burn the runaway thermal exhaust gas.

41. Equipped with an additional alarm module, The exhaust gas combustion apparatus comprises an exhaust pipe, a trigger device, and an ignition device. The trigger device is provided in the exhaust pipe and activates the ignition device when runaway exhaust gas passes through the exhaust pipe. The ignition device is provided at the outlet end of the exhaust pipe and burns the runaway exhaust gas inside the exhaust pipe. The battery pack according to claim 10, characterized in that the alarm module emits an alarm signal when the ignition device is started.

42. The battery pack according to claim 41, wherein the alarm module is provided in an exhaust gas combustion device and includes an audible alarm device and / or a light alarm device, wherein the audible alarm device is a buzzer, the light alarm device is a flashing light, and the flashing light is a red flashing light or a yellow flashing light.

43. The exhaust pipe includes a first exhaust pipe and a second exhaust pipe, and N of each of the second exhaust pipe, trigger devices, and ignition devices are provided, the inlets of the N second exhaust pipes are all connected to the outlets of the first exhaust pipes, the N ignition devices are provided at the outlets of the second exhaust pipes, and the N trigger devices are provided in one-to-one correspondence with the N second exhaust pipes, where N is an integer of 1 or more. The battery pack according to claim 42, wherein the exhaust pipe or the second exhaust pipe is provided with an upper cover, the upper cover is hinged to the exhaust pipe or the second exhaust pipe and can be opened when runaway thermal exhaust gas passes through, or the exhaust pipe or the second exhaust pipe is provided with a sealing plug, the sealing plug is provided at the outlet of the exhaust pipe or the second exhaust pipe and can be pushed up when runaway thermal exhaust gas passes through.

44. The battery pack according to claim 10, wherein a flashback prevention device is fixed to the confluence pipe, the lithium-ion battery is equipped with a buffer device located in front of the battery thermal runaway exhaust gas treatment device, and the buffer device is equipped with a pressure release valve.

45. The exhaust gas combustion device is a pulse igniter, The battery pack according to claim 10, further comprising an air intake for introducing air and mixing it with the runaway exhaust gas for combustion, as described above, for the battery thermal exhaust gas treatment device.

46. A method for treating exhaust gases from battery thermal runaway, The method for treating battery thermal runaway exhaust gas includes a step in which the exhaust gas due to battery thermal runaway is combusted by a battery thermal runaway exhaust gas treatment device described in any one of claims 2 to 9 before being discharged into the atmosphere, and with respect to the step in which the exhaust gas due to battery thermal runaway is combusted before being discharged into the atmosphere, the trigger device approaches the exhaust gas combustion device until the exhaust gas combustion device is triggered by the pressure of the exhaust gas discharged from the lithium battery or PACK box and the exhaust gas is combusted.

47. Specifically, the following steps are included: The pressure plug is pushed up from the exhaust gas outlet end by the pressure of the exhaust gas discharged from the lithium battery or PACK box, and then approaches the push switch of the exhaust gas combustion device until the push switch is turned on and the exhaust gas is burned in the exhaust gas combustion device, or Specifically, the following steps are included: The trigger block approaches the exhaust gas combustion device until the pressure of the exhaust gas discharged from the lithium battery or PACK box triggers the push switch of the exhaust gas combustion device to turn on, causing the exhaust gas to burn in the exhaust gas combustion device. The method for treating battery thermal runaway exhaust gas according to claim 46, characterized in that when the pressure of the exhaust gas discharged from the exhaust gas outlet decreases, the trigger block returns to its initial state by an elastic return member.

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