Electric equipment

Abstract

The utility model provides electric equipment, which mainly solves the problem that the existing battery pack has potential safety hazards. The electric equipment comprises a pressure-bearing shell, a flue gas treatment system and a battery pack, the pressure-bearing shell is a closed pressure shell, and an explosion venting mechanism is arranged on the pressure-bearing shell; the battery pack comprises a plurality of single batteries, and the plurality of single batteries are arranged in the pressure-bearing shell along the x direction and are connected in series through an electric connection assembly; the flue gas treatment system comprises a flue gas conveying pipe and a flue gas treatment device, the flue gas conveying pipe is respectively connected with the explosion venting mechanism and the flue gas treatment device on the pressure-bearing shell, and the flue gas treatment device is used for treating thermal runaway flue gas generated by thermal runaway of the single batteries in the pressure-bearing shell. Through double arrangement of the pressure-bearing shell and the flue gas treatment device, the safety of the battery pack in use is improved, and the potential safety hazard when the battery pack is in thermal runaway is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the battery field, and particularly relates to an electric device. BACKGROUND

[0002] At present, a plurality of single batteries are connected in series to form a battery pack, and the battery pack has the characteristics of high integration and high energy density. However, due to the high concentration of single batteries in the battery pack, under the influence of overcharging, overdischarging, overheating, mechanical impact and other factors, the battery separator is prone to collapse and internal short circuit, thereby causing thermal runaway. After the battery pack thermal runaway, it is easy to burn, and in severe cases, it can cause explosion, causing safety hazards. SUMMARY

[0003] The utility model provides an electric device, and mainly solves the problem of safety hazards existing in the existing battery pack.

[0004] To solve the above problems, the technical scheme provided by the utility model is as follows:

[0005] An electric device includes a battery pack, a pressure-containing shell, and a flue gas treatment system. The pressure-containing shell is a closed pressure shell, and the pressure-containing shell is provided with a pressure relief mechanism. The battery pack includes a plurality of single batteries, and the plurality of single batteries are arranged in the pressure-containing shell along the x direction and connected in series through an electrical connection assembly. The flue gas treatment system includes a flue gas conveying pipe and a flue gas treatment device. The flue gas conveying pipe is connected to the pressure relief mechanism and the flue gas treatment device of the pressure-containing shell. The flue gas treatment device processes the thermal runaway flue gas generated by the thermal runaway of the single battery in the pressure-containing shell.

[0006] Further, the polarities of the adjacent single batteries at the same side polarity terminal are different. The electrical connection assembly includes a first electrical connection and a second electrical connection. The polarity terminals of the adjacent single batteries with different polarities are electrically connected through the first electrical connection parallel to the x direction. The two second electrical connections are electrically connected to the polarity terminals of the single batteries with different polarities at both ends of the battery pack.

[0007] Further, the pressure-containing shell is fixedly provided with two electrical connection terminals, and the two second electrical connections are electrically connected to the two electrical connection terminals.

[0008] Further, the pressure-containing shell includes a cylinder with open ends and an end plate arranged at the open end of the cylinder. The end plate is provided with a through hole through which the second electrical connection passes, and the second electrical connection and the through hole of the end plate are insulated and sealed.

[0009] Further, the end plate comprises a first sealing plate and a second sealing plate arranged in parallel, the first sealing plate is used for sealing the open end of the cylinder body, and the first sealing plate is provided with a through hole through which the explosion relief mechanism and the electric connection assembly pass, and the second sealing plate is used for clamping the single battery in the x direction.

[0010] Further, the top plate of the pressure-bearing shell is provided with a limiting boss for limiting each single battery in the z direction.

[0011] Further, the flue gas treatment device comprises at least one of a liquid treatment device, a solid treatment device, a flue gas cooling device and an ignition device; the liquid treatment device is mainly used for treating electrolyte and gas in the thermal runaway flue gas; the flue gas cooling device is mainly used for cooling treatment of the thermal runaway flue gas; the solid treatment device is mainly used for adsorption treatment of the gas in the thermal runaway flue gas; and the ignition device is used for ignition treatment of the thermal runaway flue gas.

[0012] Further, the liquid treatment device comprises M liquid treatment tanks, each of which is provided with a flue gas inlet and a flue gas outlet, the 1st to (M-1)th liquid treatment tanks are filled with liquid treatment medium, and the Mth liquid treatment tank is empty, wherein M is an integer greater than or equal to 2.

[0013] Further, the flue gas treatment device comprises a liquid treatment device and an ignition device; the ignition device is connected at the flue gas outlet of the Mth liquid treatment tank, and is used for ignition treatment of the thermal runaway flue gas treated by the liquid treatment device.

[0014] Further, the flue gas treatment system further comprises a buffer device, the buffer device comprises at least one buffer tank, the buffer tank is provided with a flue gas inlet and a flue gas outlet communicating with the inner cavity thereof, and the buffer device is arranged between the flue gas conveying pipe and the flue gas treatment device, and is used for buffer treatment of the thermal runaway flue gas.

[0015] Compared with the prior art, the beneficial effects of the technical scheme of the utility model are as follows:

[0016] 1. The utility model discloses a pressure shell is added to the single battery of multiple series connection of the electric equipment, the pressure shell has certain pressure bearing capacity, when the thermal runaway of single battery occurs, the high temperature and high pressure thermal runaway flue gas of single battery can be gathered in the pressure shell, avoid the harm of high temperature and high pressure thermal runaway flue gas, liquid spatter leak to the device around, improve the security of battery pack thermal runaway. Meanwhile, the pressure shell is also connected with the explosion venting mechanism and flue gas treatment system, and the explosion venting mechanism carries out directional and orderly discharge to the thermal runaway flue gas in the pressure shell, and the flue gas treatment system carries out safe and reliable processing to the directional discharge thermal runaway flue gas, further reduces the harm of battery pack thermal runaway. The pressure shell and flue gas treatment device provide double protection for battery pack, avoid the security risk of battery pack thermal runaway, improve the security of battery pack use.

[0017] 2. In the electric equipment of the utility model, the pressure shell adopts the cylinder of two open ends and the end plate arranged at the open end of the cylinder, the pressure shell of this kind of structure, the cylinder is convenient to adopt extrusion etc. Integrated, make the pressure resistance of cylinder better, at the same time, the end plate of both sides is convenient to install the electric connection terminal of battery pack external connection.

[0018] 3. In the electric equipment of the utility model, the end plate includes first sealing plate and second sealing plate, by adjusting the size of second sealing plate in x direction, so that the end plate in x direction, clamps all single battery, prevents each single battery from swelling, improves the stability of each single battery in the pressure shell.

[0019] 4. In the electric equipment of the utility model, the top plate of cylinder is equipped with the limiting boss for limiting each single battery in the height direction, the limiting boss is limited to each single battery in z direction, improves the stability of each single battery in the pressure shell, avoids the shake and friction between battery pack and pressure shell in the transportation process or in the moving environment, to reduce the probability of battery pack thermal runaway.

[0020] 5. In the electric equipment of the utility model, the flue gas treatment device includes at least one of liquid treatment device, solid treatment device, flue gas cooling device and ignition device, the flue gas treatment device processes the thermal runaway flue gas generated by electric equipment through multiple ways, to avoid the security risk of thermal runaway flue gas discharge.

[0021] 6. In the electric equipment of the utility model, the liquid treatment device effectively processes the electrolyte and gas in the thermal runaway flue gas, and the Mth liquid treatment tank of the liquid treatment device is empty, when the pressure of thermal runaway flue gas is too large, the empty tank can collect the liquid treatment medium of high pressure thermal runaway flue gas extruded from the liquid treatment tank, avoid the liquid treatment medium being extruded to the subsequent device, affect the rear device.

[0022] 7. The utility device, wherein the flue gas treatment device comprises a liquid treatment device and an ignition device, the ignition device performs controllable ignition treatment on the thermal runaway flue gas treated by the liquid treatment device, and the thermal runaway flue gas after the ignition treatment can be directly discharged and does not cause hidden dangers such as combustion explosion.

[0023] 8. The utility device, wherein the flue gas treatment system further comprises a buffer device, the buffer tank buffers the thermal runaway flue gas, the thermal runaway flue gas enters the flue gas treatment device at a relatively stable flow rate, the thermal runaway flue gas is fully treated by the liquid treatment device, and meanwhile, the buffer tank can collect part of the electrolyte carried in the thermal runaway flue gas to reduce the use amount of the rear flue gas treatment device.

[0024] Other advantages, objects and features of the present utility model will be partly illustrated in the following description, and will be understood by those skilled in the art through research and practice of the present utility model. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0026] Figure 1 It is a schematic diagram of the utility device in embodiment 1;

[0027] Figure 2 It is a schematic diagram of the utility device (omitting the flue gas treatment system) in embodiment 1;

[0028] Figure 3 It is an explosion diagram of the utility device (omitting the flue gas treatment system) in embodiment 1;

[0029] Figure 4 It is a structural schematic diagram of the battery pack in embodiment 1 Figure 1 ;

[0030] Figure 5 It is a structural schematic diagram of the battery pack in embodiment 1 Figure 2 ;

[0031] Figure 6 It is an explosion diagram of the pressure-bearing shell in embodiment 1;

[0032] Figure 7 It is a structural schematic diagram of the pressure-bearing shell provided with a limiting boss in embodiment 1;

[0033] Figure 8Structure diagram of the end plate in Example 1;

[0034] Figure 9 Assembly diagram of the electrical connection assembly and the end plate of the battery pack in Example 1;

[0035] Figure 10 Diagram of the electrical equipment in Example 2;

[0036] Figure 11 Structure diagram of the liquid treatment tank in Example 2;

[0037] Figure 12 Structure diagram of the flue gas treatment device in Example 3;

[0038] Figure 13 Structure diagram of the flue gas treatment device in Example 4 Figure 1 ;

[0039] Figure 14 Structure diagram of the flue gas treatment device in Example 4 Figure 2 .

[0040] Fig. 1 is a schematic diagram of a battery pack; Fig. 2 is a schematic diagram of a flue gas conveying pipe; Fig. 3 is a schematic diagram of a liquid treatment device; Fig. 4 is a schematic diagram of a pressure relief mechanism; Fig. 5 is a schematic diagram of a solid treatment device; Fig. 6 is a schematic diagram of an ignition device; Fig. 7 is a schematic diagram of a buffer device; Fig. 11 is a schematic diagram of a pressure-bearing shell; Fig. 12 is a schematic diagram of a single battery cell; Fig. 13 is a schematic diagram of an electrical connection assembly; Fig. 14 is a schematic diagram of an electrical connection terminal; Fig. 121 is a schematic diagram of a positive polarity terminal; Fig. 122 is a schematic diagram of a negative polarity terminal; Fig. 131 is a schematic diagram of a first electrical connection member; Fig. 132 is a schematic diagram of a second electrical connection member; Fig. 111 is a schematic diagram of a cylinder body; Fig. 112 is a schematic diagram of an end plate; Fig. 113 is a schematic diagram of a first sealing plate; Fig. 114 is a schematic diagram of a second sealing plate; Fig. 115 is a schematic diagram of a limiting boss; Fig. 116 is a schematic diagram of a through hole; Fig. 31 is a schematic diagram of a liquid treatment tank; Fig. 32 is a schematic diagram of a flue gas inlet; Fig. 33 is a schematic diagram of a flue gas outlet; Fig. 34 is a schematic diagram of a flow guide pipe; Fig. 35 is a schematic diagram of a flow dividing part; Fig. 36 is a schematic diagram of a three-way valve; Fig. 37 is a schematic diagram of a connecting pipeline; Fig. 51 is a schematic diagram of a solid treatment tank; Fig. 61 is a schematic diagram of a flue gas pipeline; Fig. 62 is a schematic diagram of a smoke exhaust pipe; Fig. 63 is a schematic diagram of an igniter; Fig. 64 is a schematic diagram of a trigger; Fig. 65 is a schematic diagram of a fire damper; Fig. 71 is a schematic diagram of a buffer tank; Fig. 72 is a schematic diagram of a flue gas inlet; Fig. 73 is a schematic diagram of a flue gas outlet; and Fig. 74 is a schematic diagram of a liquid discharge valve. DETAILED DESCRIPTION

[0041] In order to make the above objectives, characteristics and advantages of the present application more apparent, a detailed description of the specific embodiments of the present application will be given below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0042] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application can be practiced according to other embodiments that can not be described in detail herein, and the skilled person can make similar generalizations without departing from the scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0043] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "top, bottom" and the like in the description is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first, second, third, etc." are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0044] The present application provides a kind of electric equipment, to reduce the harm generated after each monomer battery thermal runaway in electric equipment, additional one can withstand pressure pressure shell on the outside of each monomer battery, simultaneously, pressure shell is also connected with flue gas treatment system, the pressure shell has certain pressure capacity, when monomer battery thermal runaway occurs, high temperature and high pressure thermal runaway flue gas generated by monomer battery can be gathered in the pressure shell, avoid high temperature and high pressure thermal runaway flue gas, liquid spatter leak after generating the harm to surrounding device, flue gas treatment system safely and reliably handles the thermal runaway flue gas of directional discharge, further reduce the harm generated after battery pack thermal runaway.In the mutual action of the above pressure shell and flue gas treatment system, the harm generated by electric equipment thermal runaway is reduced, the safety of electric equipment when using is improved, so that such electric equipment has higher safety performance.

[0045] Embodiment 1

[0046] As Figures 1 to 5 shown, the present embodiment provides a kind of electric equipment, the electric equipment includes pressure shell 11, flue gas treatment system and battery pack 1;Pressure shell 11 is closed pressure shell, and the pressure shell 11 is equipped with explosion venting mechanism 4;Battery pack 1 includes multiple monomer batteries 12, multiple monomer batteries 12 are arranged in pressure shell 11, realize series connection by electric connection assembly 13, the insulation between the pressure shell and each monomer battery, the insulation can be specifically set on the inner wall of pressure shell insulation layer, or, increase insulation layer on the shell of each monomer battery, or, increase insulation pad between monomer battery and pressure shell;Flue gas treatment system includes flue gas delivery pipe 2 and flue gas treatment device, flue gas delivery pipe 2 is respectively connected with explosion venting mechanism 4 on pressure shell 11, flue gas treatment device, flue gas treatment device handles the thermal runaway flue gas generated by monomer battery 12 thermal runaway in pressure shell 11.

[0047] For the convenience of description, the arrangement direction of the single battery 12 is defined as the x direction, the height direction of the single battery 12 is defined as the z direction, and the direction perpendicular to the x direction and the z direction is defined as the y direction.

[0048] As shown in Figure 4 and Figure 5 , the battery pack 1 includes a plurality of single batteries 12 arranged in the x direction in sequence. In this embodiment, the single battery 12 is a square cell, and the number of single batteries 12 can be adjusted according to actual needs. In addition, the top of the shell of each single battery is provided with a venting membrane. A plurality of single batteries 12 are arranged in the same x direction in the pressure-bearing shell 11 and are connected in series through the electrical connection assembly 13.

[0049] As shown in Figure 4 and Figure 5 , the electrical connection assembly 13 in this embodiment includes a first electrical connection member 131 and a second electrical connection member 132. The first electrical connection member 131 is used to realize the series connection between each single battery 12 in the battery pack 1, and the second electrical connection member 132 realizes the electrical connection between the battery pack 1 and external equipment. Each single battery 12 in the battery pack 1 can be connected in series by the following method:

[0050] First, as shown in Figure 5 , the positive polarity terminals 121 of each single battery 12 are located on the same side, and the negative polarity terminals 122 are located on the other side.

[0051] The polarity terminals of different polarities of adjacent single batteries 12 are electrically connected through the first electrical connection member 131 arranged obliquely. One of the polarity terminals of the first and last single batteries is connected with one second electrical connection member 132, and the two second electrical connection members 132 pass through the pressure-bearing shell 11 and are respectively used as the electrical connection terminals 14 (the two electrical connection terminals 14 are respectively used as the total positive and total negative of the battery pack) connected to the outside of the battery pack 1.

[0052] Second, as shown in Figure 4 , the polarity of the polarity terminals of the adjacent single batteries 12 located on the same side is different, that is, the positive polarity terminal 121 of one of the two adjacent single batteries 12 and the negative polarity terminal 122 of the other single battery 12 are located on the same side of the battery pack 1. At this time, the polarity terminals of the adjacent two single batteries 12 located on the same side are opposite in polarity. The polarity terminals of different polarities of adjacent single batteries 12 are electrically connected through the first electrical connection member 131 arranged along the arrangement direction of the single battery. One of the polarity terminals of the first and last single batteries is connected with one second electrical connection member 132, and the two second electrical connection members 132 pass through the pressure-bearing shell 11 and are respectively used as the electrical connection terminals 14 (the two electrical connection terminals 14 are respectively used as the total positive and total negative of the battery pack) connected to the outside of the battery pack 1.

[0053] The first electric connecting piece 131 and the second electric connecting piece 132 are generally electric connecting plates, which are welded on the polarity terminals of the single batteries 12 when electrically connected with the polarity terminals of the single batteries 12, or the electric connecting plates can be fixed on the polarity terminals of the single batteries 12 by screws to realize the electrical connection.

[0054] As shown in Figure 2 , Figure 3 and Figure 6 , the pressure-bearing shell 11 in the embodiment is a closed pressure shell, which mainly integrates and installs the battery pack 1 and protects the battery pack 1. Different from the shell of the general battery pack, the pressure-bearing shell 11 in the utility model is a closed pressure shell, which is a sealed shell and can also bear certain pressure. When the single batteries 12 are in thermal runaway, the pressure-bearing shell 11 can ensure that the thermal runaway flue gas does not leak from the pressure-bearing shell 11, thereby avoiding the damage to the devices near the battery pack.

[0055] The shape and size of the pressure-bearing shell 11 can be designed according to the application scene of the battery pack to facilitate placement. In the embodiment, the pressure-bearing shell 11 is a rectangular shell, which can be realized by the following structures:

[0056] 1) The shell includes a cylinder, an upper cover and a lower cover. The top and bottom of the cylinder are open, the upper cover is sealed and fixed (welded) on the top of the cylinder, and the lower cover is sealed and fixed (welded) on the bottom of the cylinder.

[0057] 2) The shell includes a U-shaped shell, a first cover plate, a third cover plate and a second cover plate. The first cover plate and the third cover plate cover two opposite open ends of the U-shaped shell, respectively. The second cover plate covers the open end of the top of the U-shaped shell and is in sealed connection with the open end.

[0058] 3) The shell includes a cylinder 111 and two end plates 112. The front and rear of the cylinder 111 are open, one of the end plates 112 is sealed and fixed (welded) on the open end of the front of the cylinder 111, and the other end plate 112 is sealed and fixed (welded) on the open end of the rear of the cylinder 111.

[0059] The structure of the pressure-bearing shell 11 in the embodiment is shown in Figure 6 , which includes a cylinder 111 with two open ends and an end plate 112 covering the open end of the cylinder 111. The pressure-bearing shell 11 with this structure has good pressure-bearing performance. The cylinder 111 can be integrally formed by extrusion process, so that the pressure resistance of the cylinder is good. Meanwhile, the end plates on both sides facilitate the installation of the electric connecting terminals of the battery pack.

[0060] As shown in Figure 7As shown, the top plate of the cylinder body 111 is provided with a limiting boss 115 for limiting the height of each single battery 12. The limiting boss 115 limits each single battery 12 in the z direction, so that each single battery 12 is stably and reliably installed in the pressure-bearing shell 11, improving the stability of each single battery 12 in the pressure-bearing shell 11, avoiding shaking and friction between the battery pack and the pressure-bearing shell 11 during transportation or in a moving environment, and reducing the probability of thermal runaway of the battery pack.

[0061] As shown, Figure 8 The end plate 112 is mainly used to seal the open end of the cylinder body 111, and is provided with an explosion venting mechanism 4. The thermal runaway smoke in the pressure-bearing shell 11 is discharged from the pressure-bearing shell 11 through the explosion venting mechanism 4. The end plate 112 in this embodiment includes a first sealing plate 113 and a second sealing plate 114. By adjusting the size of the second sealing plate 114 in the x direction, the end plate 112 can clamp all single batteries 12 in the x direction, prevent each single battery 12 from swelling, and improve the stability of each single battery 12 in the pressure-bearing shell 11.

[0062] In other embodiments, the end plate 112 can also be implemented by a sealing plate. Compared with the double-sealing plate structure of the end plate 112 described above, the end plate 112 with one sealing plate has relatively weak pressure-bearing performance.

[0063] As shown, Figure 8 The end plate 112 is provided with a through hole 116 through which the second electrical connecting piece 132 passes. After passing through the end plate 112, the second electrical connecting piece 132 can be bent to serve as an electrical connecting terminal 14 for electrical connection between the entire battery pack 1 and external equipment.

[0064] As shown, Figure 8 and Figure 9 When the second electrical connecting piece 132 passes through the pressure-bearing shell 11, it needs to be insulated from the pressure-bearing shell 11. Specifically, the non-electrically connecting part of the second electrical connecting piece 132 can be insulated, such as by spraying insulating paint or wrapping insulating film; the inner wall of the through hole 116 of the pressure-bearing shell 11 can be insulated, such as by spraying insulating paint; an insulating sleeve can be additionally arranged between the pressure-bearing shell 11 and the second electrical connecting piece 132; of course, for safety, multiple insulation methods can be combined to achieve insulation between the second electrical connecting piece 132 and the pressure-bearing shell 11.

[0065] In addition, the pressure shell has a certain pressure bearing capacity. To ensure the pressure bearing performance of the entire pressure shell, two electric connection terminals 14 are additionally fixed on the pressure shell as the total positive and total negative of the battery pack. Two second electric connection pieces 132 are respectively and correspondingly electrically connected with the two electric connection terminals 14. When the electric connection terminals 14 are arranged on the end plate 112 of the pressure shell, the second electric connection piece 132 needs to have a certain flexibility and can be bent in the pressure shell. During assembly, the second electric connection piece 132 is first electrically connected with the monomer battery polarity terminal, and then the end plate 112 is placed near the open end of the cylinder body, and the second electric connection piece 132 is correspondingly electrically connected with the two electric connection terminals 14. Since the second electric connection piece 132 is a flexible piece and can be bent in the pressure shell, after the second electric connection piece 132 is connected with the electric connection terminal 14, the sealing connection of the end plate 112 and the cylinder body 111 can be finally performed.

[0066] Meanwhile, the first sealing plate 113 is provided with an explosion venting mechanism 4, and the thermal runaway flue gas in the pressure shell 11 is discharged out of the pressure shell 11 through the explosion venting mechanism 4. The explosion venting mechanism 4 specifically includes an explosion venting pipe and an explosion venting part. The explosion venting pipe is connected with the explosion venting port on the end plate 112, and the explosion venting part is arranged on the explosion venting pipe or the explosion venting port. The explosion venting part can be an explosion venting membrane or an explosion venting valve. The explosion venting mechanism 4 can ensure that when the monomer battery 12 in the pressure shell 11 has thermal runaway, the thermal runaway flue gas in the monomer battery 12 can be orderly discharged to the subsequent flue gas treatment device.

[0067] The flue gas treatment device in the embodiment is connected with the explosion venting mechanism 4 on the pressure shell 11 through the flue gas conveying pipe 2. When the monomer battery 12 has thermal runaway, the internal pressure of the monomer battery 12 gradually increases. When the gas pressure in the battery shell of the monomer battery 12 reaches a certain value, the explosion venting membrane on each monomer battery 12 is opened, or the shell of the monomer battery 12 is torn or damaged, and the electrolyte and reaction gas vaporized and evaporated in the monomer battery 12 are ejected and released, forming thermal runaway flue gas. Since the pressure shell 11 can bear a certain pressure shell, the thermal runaway flue gas is diffused in the pressure shell 11 and cannot leak. When the gas pressure in the pressure shell 11 reaches a certain value, the explosion venting mechanism 4 is opened, and the thermal runaway flue gas is orderly conveyed to the flue gas treatment device through the explosion venting mechanism 4 and the flue gas conveying pipe 2, and the flue gas treatment device processes the thermal runaway flue gas.

[0068] The flue gas treatment device in the embodiment includes an ignition device 6, which performs controllable ignition treatment on the thermal runaway flue gas to avoid safety hazards caused by the thermal runaway flue gas after being discharged. The ignition device 6 can adopt the structures disclosed in Chinese patents CN220324645U, CN219453979U, CN218523576U, CN218498146U, CN218414927U, and the like.

[0069] As shown in Figure 1 , the ignition device 6 in the embodiment includes a flue gas pipeline 61 and at least one group of ignition assemblies. The flue gas pipeline 61 is connected with the flue gas conveying pipe 2. The ignition assemblies are connected on the flue gas pipeline 61. The number of the ignition assemblies can be set according to requirements, which can be set as one group, two groups, or three groups, etc. When set as multiple groups, not only can the thermal runaway flue gas be fully ignited to ensure reliable ignition, but also the safety hazards caused by the failure or malfunction of a single ignition assembly to reliably ignite the thermal runaway flue gas can be avoided.

[0070] As shown in Figure 1 , each ignition assembly includes an exhaust pipe 62 and an igniter 63 arranged at the outlet of the exhaust pipe 62. The exhaust pipe 62 is connected with the flue gas pipeline 61 (when the ignition assemblies are multiple, the exhaust pipes 62 of the multiple ignition assemblies are all communicated with the flue gas pipeline 61, and when the ignition assemblies are one, the exhaust pipe 62 and the flue gas pipeline 61 are made of the same pipeline). The igniter 63 is opened when the thermal runaway flue gas passes through the exhaust pipe 62, and the igniter 63 ignites the thermal runaway flue gas discharged from the exhaust pipe 62. The opening of the igniter 63 can be opened by a trigger 64 or by a BMS (battery management system). When opened by the trigger 64, the trigger 64 can be a sensor of different structures, which can be arranged on the exhaust pipe 62 or on the flue gas pipeline 61, and can detect parameters such as temperature, pressure, or gas volume fraction in real time. When the set threshold is exceeded, a signal can be sent to start the igniter 63. Specifically, the trigger 64 can be at least one of a pressure sensor, a gas sensor, or a temperature sensor. When started by the trigger 64, a flame arrester 65 can also be arranged on the exhaust pipe 62, which is preferably a pipeline flame arrester, used to prevent the flame from transmitting downward through the exhaust pipe 62 to damage the trigger 64 and other devices. When opened by the BMS, the BMS monitors the voltage, current, and temperature of the battery pack in real time. When any single battery cell is in thermal runaway, the voltage, current, and temperature exceed the threshold, and the igniter 63 is started.

[0071] The structure of the igniter 63 can be various, for example, it can specifically adopt an existing electric arc igniter or a resistance wire igniter, etc. The electric arc igniter can specifically adopt a pulse igniter, and the power supply mode of the igniter 63 can adopt dry batteries or alternating current according to the site environment.

[0072] Embodiment 2

[0073] The power consuming device in the embodiment is similar to that in Embodiment 1, and different from Embodiment 1, the flue gas treatment device in the embodiment includes a liquid treatment device 3 and an ignition device 6, the liquid treatment device 3 is arranged at the front end of the ignition device 6, the thermal runaway flue gas generated by the thermal runaway of the battery pack is preferentially conveyed to the liquid treatment device 3 through the flue gas conveying pipe 2, and after being treated by the liquid treatment device 3, the remaining gas is ignited and treated by the ignition device 6.

[0074] In other embodiments, the flue gas treatment device can also only include a liquid treatment device 3, which is connected with the flue gas conveying pipe 2 and mainly used for fully treating the electrolyte and part of the combustible carried in the thermal runaway flue gas, so as to prevent the vaporized electrolyte from continuing to decompose to generate combustible gas, and further reduce the content of combustible (electrolyte and combustible gas) in the thermal runaway flue gas.

[0075] As shown in Figure 10 The liquid treatment device 3 in the embodiment includes M liquid treatment tanks 31, each liquid treatment tank 31 is provided with a flue gas inlet 32 and a flue gas outlet 33, the flue gas inlet 32 is used for inputting the thermal runaway flue gas into the liquid treatment tank 31, and the flue gas outlet 33 is used for discharging the treated thermal runaway flue gas, and meanwhile, the liquid treatment tank 31 is filled with a liquid treatment medium. The number of liquid treatment tanks 31 can be set according to requirements, if the liquid treatment tanks 31 are multiple, the multiple liquid treatment tanks 31 can be connected in series through a connecting pipe 37. The shape of the liquid treatment tank 31 is not limited, which can be a rectangular tank body, a circular tank body, an elliptical tank body and the like, and preferably a circular tank body, which has good pressure bearing performance.

[0076] The above M liquid treatment tanks 31 can all be filled with a liquid treatment medium, and when filled, the liquid treatment medium is filled to about 2 / 3 of the inner cavity of the liquid treatment tank 31, so as to avoid the liquid treatment medium in the previous liquid treatment tank 31 being extruded into the next liquid treatment tank 31, resulting in poor treatment effect.

[0077] In actual use, the pressure of the thermal runaway flue gas when the battery pack is initially vented is too large, and the liquid treatment medium in the last liquid treatment tank 31 can be extruded and flushed out of the liquid treatment tank 31 by the thermal runaway flue gas. Based on this, the last liquid treatment tank 31 can be set as an empty tank, for example, the liquid treatment device 3 includes four liquid treatment tanks 31, of which the first to third liquid treatment tanks 31 are filled with a liquid treatment medium, and the fourth liquid treatment tank 31 is an empty tank. When the pressure of the thermal runaway flue gas discharged by the battery pack is too large, the empty tank can collect the liquid treatment medium extruded by the high-pressure thermal runaway flue gas, avoid the liquid treatment medium being extruded out of the liquid treatment tank 31, and improve the safety of the liquid treatment device 3 in use.

[0078] As Figure 11 shown, the flue gas inlet 32 can be arranged at the top of the liquid treatment tank 31, or at the bottom of the liquid treatment tank 31. In order to facilitate the connection of each liquid treatment tank 31, the flue gas inlet 32 and the flue gas outlet 33 are preferably arranged at the top of the liquid treatment tank 31. At this time, each liquid treatment tank 31 only needs to be connected at the top, which improves the connectivity of the entire thermal runaway flue gas treatment device and the compactness of the pipeline arrangement. In addition, the above-mentioned connecting pipeline 37 can be a metal bellows. After being connected by the metal bellows, each liquid treatment tank 31 can be arranged according to the requirements of the installation space, meet various installation requirements, and save installation space.

[0079] As Figure 11 shown, after arranging the flue gas inlet 32 at the top of the liquid treatment tank 31, in order to make the thermal runaway flue gas fully contact with the liquid treatment medium in the liquid treatment tank 31, the flue gas inlet 32 is connected with a flow guide pipe 34. At least part of the flow guide pipe 34 can be immersed in the liquid treatment medium. Preferably, the flow guide pipe 34 extends to the bottom of the liquid treatment tank 31 and can be completely immersed in the liquid treatment medium. When the thermal runaway flue gas passes through the liquid treatment tank 31, it fully contacts with the liquid treatment medium in the liquid treatment tank 31, which improves the treatment effect of the liquid treatment medium.

[0080] As Figure 11 shown, one end of the above-mentioned flow guide pipe 34 immersed in the liquid treatment medium is provided with a flow dividing part 35. The flow dividing part 35 disperses and divides the thermal runaway flue gas before reacting with the liquid treatment medium in the liquid treatment tank 31, so that the thermal runaway flue gas has a large inflow and a small outflow, which is beneficial to the dispersion of the thermal runaway flue gas and makes the thermal runaway flue gas fully contact with the liquid treatment medium, thereby improving the treatment effect of the liquid treatment medium. The flow dividing part 35 in the embodiment can be a foamed copper column. The foamed copper column is easy to install and has good dispersion and division effect. Specifically, it is fixed to the port of the end of the flow guide pipe 34 immersed in the liquid treatment medium. Foamed copper is a structure with a large number of three-dimensional pores in a copper matrix, which has a dispersion and buffering effect on fluid. In use, it is processed into a columnar structure. The thermal runaway flue gas passing through the flow guide pipe 34 flows out of the foamed copper column, and then flows out through the side wall or bottom of the foamed copper column, so as to achieve the dispersion and buffering effect of the thermal runaway flue gas, and make the divided thermal runaway flue gas fully contact with the liquid treatment medium.

[0081] As Figure 11As shown, in order to facilitate the injection of liquid treatment medium and the pressure test of the liquid treatment tank 31, a three-way valve 36 is arranged on the flue gas outlet 33, which can be a three-way ball valve. The three-way valve 36 can be used for filling the liquid treatment medium after the pressure test of all liquid treatment tanks 31 is completed. Specifically, the first port of the three-way valve 36 is connected with the flue gas outlet 33, the second port is used for discharging the thermal runaway flue gas, and the third port is used for injecting the liquid treatment medium.

[0082] After the pressure test of the liquid treatment tank 31 is completed, the liquid treatment medium is filled, which is mainly used to fully treat the electrolyte carried in the thermal runaway flue gas, so as to prevent the vaporized electrolyte from continuing to decompose to produce flammable gas, thereby reducing the content of flammable substances (electrolyte and flammable gas) in the thermal runaway flue gas. The liquid treatment medium can specifically use the following substances:

[0083] First, the liquid treatment medium can be an organic solvent. According to the principle of "like dissolves like", the organic solvent can fully treat the electrolyte carried in the thermal runaway flue gas, and can also prevent the vaporized electrolyte from continuing to decompose. The organic solvent is specifically an ester solvent, an alcohol solvent or an aldehyde solvent. The ester solvent can be diethyl phthalate solvent, methyl salicylate solvent, ethyl acetate solvent or butyl acetate solvent, etc., the alcohol solvent can be benzyl alcohol solvent, isoamyl alcohol solvent, isobutyl alcohol solvent, isopropyl alcohol solvent, isoamyl alcohol solvent, n-propyl alcohol solvent or cyclohexanol solvent, etc., and the aldehyde solvent is benzaldehyde solvent, heptanal, phenylpropyl aldehyde or methyl non ethyl aldehyde, etc.

[0084] Second, the liquid treatment medium is an alkali solution, which can be a sodium hydroxide solution, a potassium hydroxide solution, a barium hydroxide solution, etc. The alkali solution can react with the carbonate in the electrolyte to prevent the vaporized electrolyte from continuing to produce harmful gas, thereby treating the thermal runaway flue gas at the source. At the same time, the alkali solution can cool the thermal runaway flue gas and fully dissolve the electrolyte vapor in the thermal runaway flue gas in the alkali solution. In addition, the alkali solution has good treatment effect on CO2, POF3 and HF, etc. acidic substances, which can effectively treat the thermal runaway flue gas.

[0085] Among the above two kinds of liquid treatment media, the alkali solution not only treats the electrolyte in the thermal runaway flue gas to prevent the vaporized electrolyte from continuing to decompose, but also treats part of the gas, so that the gas amount of the thermal runaway flue gas treated by the alkali solution is greatly reduced. Therefore, the treatment effect of the alkali solution is better than that of the organic solvent.

[0086] For the alkali solution, the greater the concentration, the better the treatment effect on the thermal runaway smoke gas. However, the applicant found that the low-concentration alkali solution has a better treatment effect than the high-concentration alkali solution, especially the alkali solution with a concentration of 0.05-0.5 mol / L, when the thermal runaway smoke gas passes through the alkali solution with the concentration, the amount of collected gas is the smallest, and the treatment effect is better than that of the alkali solution with a concentration of 0.5 mol / L or more. Therefore, when the alkali solution is used to treat the thermal runaway smoke gas, the prejudice of the prior art is overcome, and the low-concentration alkali solution is used to treat the thermal runaway smoke gas, so that the alkali solution can effectively treat the thermal runaway smoke gas.

[0087] In other embodiments, the liquid treatment medium described above can also be a liquid such as water that can treat the thermal runaway smoke gas.

[0088] Embodiment 3

[0089] As Figure 12 shown, the power-using equipment provided in the embodiment is similar to the power-using equipment in Embodiments 1 and 2, except that the smoke treatment device in the embodiment includes a liquid treatment device 3 and a solid treatment device 5 arranged in sequence. As known from Embodiment 2, the liquid treatment device 3 can effectively treat the thermal runaway smoke gas, so that the volume of the treated thermal runaway smoke gas is greatly reduced. On this basis, the solid treatment device 5 can be used to treat the remaining gas, so that the treated thermal runaway smoke gas is completely non-combustible.

[0090] In other embodiments, the solid treatment device 5 can also be used alone to treat the thermal runaway smoke gas discharged from the battery pack.

[0091] The specific structure of the liquid treatment device 3 has been described in detail in Embodiment 2, and will not be described in this embodiment. The solid treatment device 5 in the embodiment is arranged at the rear end of the liquid treatment device 3, and is used to treat the thermal runaway smoke gas treated by the liquid treatment device 3. The solid treatment device 5 includes at least one solid treatment tank 51. The number of the solid treatment tanks 51 can be arranged according to the number of the single batteries and the demand. If the solid treatment tanks 51 are multiple, the multiple solid treatment tanks 51 can be arranged in series. At this time, the smoke inlet of the first solid treatment tank 51 is connected with the smoke outlet 33 of the last liquid treatment tank 31 in the liquid treatment device 3. The specific structure of the solid treatment tank 51 is similar to that of the liquid treatment tank 31, and is filled with solid adsorption medium, which is used to treat the thermal runaway smoke gas treated by the liquid treatment tank 31.

[0092] The solid adsorption medium in the solid treatment tank 51 can be activated carbon, graphene, carbon nanotubes, graphite, alumina, montmorillonite, silicate, phosphate or porous glass, etc., which is used to treat the residual gas after the liquid treatment tank 31 treatment, for example, to adsorb excess H2, CO, methane, ethylene, etc. Preferably, the solid adsorption medium is activated carbon which is relatively low in cost and has relatively excellent treatment effect, and generally, activated carbon with high iodine value or modified activated carbon is selected, which is easy to adsorb small molecular weight gas in thermal runaway flue gas, for example, easy to react with hydrogen, methane, etc.

[0093] The flue gas treatment device in the embodiment introduces the thermal runaway flue gas generated by the battery pack thermal runaway into the liquid treatment tank 31 for treatment, and the liquid treatment tank 31 treats the electrolyte and part of the gas carried in the thermal runaway flue gas, prevents the vaporized electrolyte from continuing to decompose to generate gas, thereby reducing the gas production of the battery thermal runaway gas, and the subsequent solid treatment tank 51 uses less solid adsorption medium to complete the treatment of the thermal runaway flue gas, and the treated gas is non-flammable, which improves the safety of the battery pack thermal runaway.

[0094] Embodiment 4

[0095] The electric device in the embodiment is similar to the electric device in the embodiments 1, 2 and 3, except that the flue gas treatment system in the embodiment further comprises a buffer device 7, which is arranged between the flue gas conveying pipe 2 and the flue gas treatment device, and buffers the thermal runaway flue gas entering the flue gas treatment device.

[0096] As shown in Figure 13 and Figure 14 , the buffer device 7 comprises N buffer tanks 71, each of which is provided with an inlet smoke port 72 and an outlet smoke port 73 which are in communication with the inner cavity thereof; the flue gas inlet 32 of the first liquid treatment tank 31 is connected with the outlet smoke port 73 of the Nth buffer tank 71, wherein N is an integer greater than or equal to 1. Figure 13 A schematic view of the flue gas treatment device comprising the liquid treatment device 3, and the buffer device 7 is arranged at the front end of the liquid treatment device 3. Figure 14 A schematic view of the flue gas treatment device comprising the liquid treatment device 3 and the ignition device 6, and the buffer device 7 is arranged at the front end of the liquid treatment device 3, and the ignition device 6 is arranged at the rear end of the liquid treatment device 3. In other embodiments, the buffer device 7 can also be arranged at the front end of the ignition device 6 alone.

[0097] The number of the buffer tanks 71 can be set according to requirements. If there are multiple buffer tanks 71, the multiple buffer tanks 71 can be connected in series through connecting pipelines. The shape of the buffer tank 71 is not limited, and can be a rectangular tank body, a circular tank body, an oval tank body, etc. Preferably, a circular tank body is adopted, which has good pressure-bearing performance.

[0098] The number of the buffer tank 71 in the embodiment is one, and the buffer tank 71 is an empty tank body, which is not filled with substances inside, and is arranged between the flue gas conveying pipe 2 and the flue gas treatment device. The buffer tank 71 mainly has the following effects:

[0099] First, the buffer tank 71 buffers the heat runaway flue gas.

[0100] The buffer tank 71 is arranged in front of the flue gas treatment device, buffers the heat runaway flue gas, slows down the speed of the heat runaway flue gas, and reduces the pressure of the heat runaway flue gas. The heat runaway flue gas enters the liquid treatment tank 31 or the ignition device 6 at a relatively stable flow rate, so that the liquid treatment medium can treat the heat runaway flue gas more sufficiently. Alternatively, when the heat runaway flue gas is ignited by the ignition device 6, the combustion flame is relatively stable, which avoids the defect that the heat runaway flue gas with a relatively large instantaneous pressure rapidly passes through the liquid treatment medium, the heat runaway flue gas cannot be treated sufficiently, and the treatment effect of the liquid treatment medium is improved.

[0101] Second, the buffer tank 71 collects the electrolyte in the heat runaway flue gas.

[0102] The single battery has a certain amount of free electrolyte. The free electrolyte is sprayed out with the heat runaway flue gas when the battery pack is in heat runaway. The buffer tank 71 is arranged in front of the liquid treatment device 3, buffers the heat runaway flue gas, and separates the heat runaway flue gas into gas and liquid at the same time. The electrolyte carried by the heat runaway flue gas is collected in the buffer tank 71, so that the use amount of the liquid treatment medium in the subsequent liquid treatment device 3 can be reduced.

[0103] When the battery pack is in thermal runaway, almost all the electrolyte in the battery pack is ejected with the thermal runaway smoke, and the electrolyte is ignited together with the flammable gas. At this time, the liquid electrolyte carried in the thermal runaway smoke may cause flame spatter and other hazards during combustion. At the same time, when the thermal runaway smoke is ignited, the electrolyte in the thermal runaway smoke participates in combustion at the same time as the flammable gas, producing a large amount of combustion flame, which may affect the devices near the ignition device 6 and pose a certain safety hazard. The buffer tank 71 is arranged in front of the ignition device 6, which buffers the thermal runaway smoke and separates the gas and liquid in the thermal runaway smoke at the same time, so that the electrolyte carried in the thermal runaway smoke is collected in the buffer tank 71. Not only can it prevent the vaporized electrolyte from continuing to decompose to produce flammable gas and reduce the amount of flammable gas, but also when the subsequent thermal runaway smoke is ignited, only the flammable gas is burned (the electrolyte has been collected by the buffer tank 71), so that the size of the flame when the thermal runaway smoke is ignited is reduced, and the safety hazard to the surrounding environment is reduced.

[0104] Third, impurities in the thermal runaway smoke are removed;

[0105] When the battery pack is in thermal runaway, the temperature inside each single battery 12 is about 140℃-850℃. At this temperature, the separators, plastic films, plastic parts and other easy-to-melt materials inside the single battery 12 are melted by high temperature. The above molten substances are ejected from the battery cavity along with the high-temperature and high-pressure thermal runaway smoke, and flow through the smoke conveying pipe 2 to the rear thermal runaway smoke treatment device. As the temperature of the thermal runaway smoke decreases, the molten substances gradually solidify and block the pipeline in the smoke treatment device. At this time, after the above buffer tank 71 is added, the impurities such as molten substances ejected with the thermal runaway smoke are deposited and collected in the buffer tank 71 when the thermal runaway smoke is buffered in the buffer tank 71, avoiding the subsequent pipeline blockage problem.

[0106] Fourth, the liquid treatment medium is collected;

[0107] When the battery pack is in thermal runaway, the thermal runaway smoke ejected instantaneously has a high pressure. The high-pressure thermal runaway smoke enters the liquid treatment tank 31 through the smoke conveying pipe 2. Since the liquid treatment tank 31 is filled with liquid treatment medium and is provided with a shunt part 35, the thermal runaway smoke cannot be discharged from the liquid treatment tank 31 in time, and the liquid treatment tank 31 is pressurized. At this time, the following phenomena may occur: the liquid treatment medium in the liquid treatment tank 31 is backflushed to the smoke conveying pipe 2 by the high-pressure gas in the liquid treatment tank 31, the smoke conveying pipe 2 is blocked, and the subsequent generated thermal runaway smoke cannot be smoothly discharged to the liquid treatment tank 31 through the smoke conveying pipe 2;

[0108] A buffer tank 71 is added in front of the liquid treatment tank 31, when the liquid treatment medium in the liquid treatment tank 31 is backflushed, the liquid treatment medium is collected in the front buffer tank 71 and cannot flow into the flue gas conveying pipe 2, thereby avoiding the problem of blockage of the flue gas conveying pipe 2, so that the thermal runaway flue gas can be smoothly discharged into the liquid treatment device 3 for treatment.

[0109] As shown in Figure 13 The buffer tank 71 is provided with a smoke inlet 72 and a smoke outlet 73 which communicate with the inner cavity of the buffer tank 71, the smoke inlet 72 is mainly used for connecting with the flue gas conveying pipe 2, the flue gas conveying pipe 2 conveys the thermal runaway flue gas generated by the thermal runaway of the battery pack into the buffer tank 71, and the smoke outlet 73 is mainly used for discharging the thermal runaway flue gas in the buffer tank 71. The smoke inlet 72 and the smoke outlet 73 can be arranged on the side wall of the buffer tank 71 or on the top of the buffer tank 71, in the embodiment, the smoke inlet 72 and the smoke outlet 73 are arranged on the top of the buffer tank 71, the smoke inlet 72 is arranged on the top of the buffer tank 71, which can make the solid impurities and electrolyte carried by the thermal runaway flue gas deposit on the bottom of the buffer tank 71 under the action of gravity, and the liquid in the buffer tank 71 is difficult to be squeezed into the front flue gas conveying pipe 2 through the smoke inlet 72 on the top; the smoke outlet 73 is arranged on the top of the buffer tank 71, which can make the solid impurities and electrolyte carried by the thermal runaway flue gas not be discharged smoothly, and make the gas in the thermal runaway flue gas be discharged smoothly from the buffer tank 71.

[0110] In addition, as shown in Figure 13 A liquid discharge valve 74 can also be arranged on the bottom of the buffer tank 71 to timely discharge the liquid in the buffer tank 71. In order to facilitate the standardization and integration of the flue gas treatment system, the buffer tank 71 can adopt a similar structure as the liquid treatment tank 31, and a three-way valve 36 can also be installed on the smoke outlet 73 of the buffer tank 71, and the liquid treatment tank 31 and the buffer tank 71 can be subjected to a pressure test and a leak test at the same time.

Claims

1. An electric power using device, characterized by comprising: The battery pack, the pressure shell, and a flue gas treatment system are included. The pressure shell is a closed pressure shell, and the pressure shell is provided with an explosion relief mechanism. The battery pack includes a plurality of single batteries, which are arranged in the pressure shell along the x direction and connected in series through an electrical connection assembly. The flue gas treatment system includes a flue gas conveying pipe and a flue gas treatment device, the flue gas conveying pipe is connected with the explosion relief mechanism and the flue gas treatment device respectively, and the flue gas treatment device treats the thermal runaway flue gas generated by the thermal runaway of the single batteries in the pressure shell.

2. The powered device of claim 1, wherein, The adjacent single batteries have different polarities of the same side polarity terminal. The electrical connection assembly includes a first electrical connection member and a second electrical connection member. The polarity terminals with different polarities of the adjacent single batteries are electrically connected through the first electrical connection member parallel to the x direction, and the two second electrical connection members are electrically connected with the polarity terminals with different polarities of the single batteries at both ends of the battery pack.

3. The powered device of claim 2, wherein, The pressure shell is fixedly provided with two electrical connection terminals, and the two second electrical connection members are electrically connected with the two electrical connection terminals respectively.

4. The powered device of claim 2, wherein, The pressure shell includes a cylinder with both ends open and an end plate arranged at the open end of the cylinder, the end plate is provided with a through hole through which the second electrical connection member passes, and the second electrical connection member and the through hole of the end plate are insulated and sealed.

5. The powered device of claim 4, wherein, The end plate includes a first sealing plate and a second sealing plate arranged in parallel, the first sealing plate is used for sealing the open end of the cylinder, the first sealing plate is provided with a through hole through which the explosion relief mechanism and the electrical connection assembly pass, and the second sealing plate is used for clamping the single batteries in the x direction.

6. The powered device of claim 1, wherein, The top plate of the pressure shell is provided with a limiting boss for limiting each single battery in the z direction.

7. The powered device of any one of claims 1 to 6, wherein, The flue gas treatment device includes at least one of a liquid treatment device, a solid treatment device, a flue gas cooling device, and an ignition device. The liquid treatment device is mainly used for treating electrolyte and gas in the thermal runaway flue gas. The flue gas cooling device is mainly used for cooling treatment of the thermal runaway flue gas. The solid treatment device is mainly used for adsorbing treatment of the gas in the thermal runaway flue gas. The ignition device is used for ignition treatment of the thermal runaway flue gas.

8. The powered device of claim 7, wherein, The liquid treatment device includes M liquid treatment tanks, each liquid treatment tank is provided with a flue gas inlet and a flue gas outlet, the first to M-1 liquid treatment tanks are filled with liquid treatment medium, and the Mth liquid treatment tank is empty, wherein M is an integer greater than or equal to 2.

9. The powered device of claim 8, wherein, The flue gas treatment device includes a liquid treatment device and an ignition device, the ignition device is connected at the flue gas outlet of the Mth liquid treatment tank, and is used for ignition treatment of the thermal runaway flue gas treated by the liquid treatment device.

10. The powered device of claim 7, wherein, The flue gas treatment system further includes a buffer device, the buffer device includes at least one buffer tank, the buffer tank is provided with a flue gas inlet and a flue gas outlet communicating with the inner cavity thereof, the buffer device is arranged between the flue gas conveying pipe and the flue gas treatment device, and is used for buffer treatment of the thermal runaway flue gas.

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