Battery pack thermal runaway treatment device and vehicle

Abstract

The utility model provides a battery pack thermal runaway treatment device and a vehicle, the battery pack thermal runaway treatment device comprises an exhaust pipe and a storage tank; the exhaust pipe is used for being connected with the battery pack so as to exhaust flue gas generated by thermal runaway of the battery pack; and the storage tank is connected with the exhaust pipe and is used for storing impurities in the flue gas exhausted by the exhaust pipe. The storage tank is arranged on the exhaust pipe to store impurities in flue gas generated by thermal runaway of the battery pack, so that the risk of blockage of the exhaust pipe caused by the impurities in the flue gas is reduced, and the exhaust smoothness of the exhaust pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a battery pack thermal runaway processing device and a vehicle. Background Art

[0002] As new energy vehicles are gradually promoted in my country, their market share increases year by year, and the safety of new energy vehicles is also receiving more and more attention. As the power supply component of new energy vehicles, the safety of the power battery pack is a key factor affecting the safety of new energy vehicles. The power battery pack is prone to thermal runaway under conditions of excessive use or internal structural failure. After the battery thermal runaway, a large amount of smoke will be generated. The smoke contains a large amount of particulate matter, electrolyte vapor and toxic gases such as CO, H2, CxHy, HF, etc. If these fumes are not discharged from the vehicle in time, they will enter the passenger compartment and cause poisoning and suffocation of the passengers, seriously threatening the life safety of the passengers.

[0003] Therefore, in the prior art, some vehicles are equipped with exhaust devices, which exhaust the smoke generated by thermal runaway of the battery pack out of the vehicle to ensure the safety of passengers. However, since the smoke contains a large amount of undecomposed particulate matter and heated volatilized electrolyte vapor, the exhaust device is prone to tracheal blockage and unsmooth exhaust when used for a long time, thus affecting the exhaust effect of the exhaust device. Utility Model Content

[0004] In view of this, the utility model provides a battery pack thermal runaway processing device and a vehicle, so as to at least solve the problem in the prior art that the exhaust pipe is easily blocked during the exhaust process of smoke generated by the thermal runaway of the battery pack.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] The utility model provides a battery pack thermal runaway processing device including an exhaust pipe and a storage tank;

[0007] The exhaust pipe is used to be connected to the battery pack to discharge the smoke generated by thermal runaway of the battery pack;

[0008] The storage tank is connected to the exhaust pipe, and is used to store impurities in the flue gas discharged from the exhaust pipe.

[0009] Optionally, the exhaust pipe is provided with an opening, the storage tank is connected to the opening, and impurities in the flue gas are discharged into the storage tank through the opening.

[0010] Optionally, the device further comprises a smoke filter; the smoke filter is arranged in the exhaust pipe and is used for filtering impurities in the smoke.

[0011] Optionally, the opening includes a first opening, and the first opening is arranged on the pipe wall of the exhaust pipe where the smoke filtering device is arranged.

[0012] Optionally, a hollow area is provided on the pipe wall of the exhaust pipe, and the hollow area forms the first opening.

[0013] Optionally, the number of the hollow areas is at least two, and at least two of the hollow areas are arranged at intervals on the pipe wall of the exhaust pipe.

[0014] Optionally, the opening includes a second opening, and the second opening is located on a side of the smoke filtering device close to the battery pack.

[0015] Optionally, the second opening is arranged on the tube wall of the exhaust pipe; or, the exhaust pipe is segmented to form a first tube body and a second tube body, the first tube body and the second tube body are arranged at an interval, and the second opening is formed between the first tube body and the second tube body.

[0016] Optionally, the storage tank is arranged below the opening along the direction of gravity.

[0017] Optionally, at least a portion of the exhaust pipe passes through the storage tank, and the opening is located inside the storage tank.

[0018] Optionally, the battery pack thermal runaway processing device also includes a flue gas purification device; the flue gas purification device is arranged in the exhaust pipe, and the flue gas purification device is located on the side of the flue gas filtering device away from the battery pack; the flue gas purification device is used to purify the flue gas.

[0019] Optionally, the battery pack thermal runaway processing device also includes a pressure regulating valve, which is connected to the exhaust pipe and is used to adjust the pressure in the exhaust pipe.

[0020] Optionally, the battery pack thermal runaway processing device further includes an air pump connected to an end of the exhaust pipe away from a side of the battery pack.

[0021] Optionally, the battery pack thermal runaway processing device also includes a pressure gauge, which is connected to the exhaust pipe and is used to monitor the pressure in the exhaust pipe.

[0022] Optionally, the pressure gauge is connected to a pipeline on a side of the exhaust pipe close to the battery pack. The utility model also provides a vehicle, comprising any of the above battery pack thermal runaway processing devices.

[0023] Optionally, the vehicle also includes a battery management system and a green clean system; the battery management system is electrically connected to the battery pack thermal runaway processing device and the green clean system respectively, and the battery management system is used to control the green clean system to start up in the event of thermal runaway of the battery pack.

[0024] Optionally, the vehicle also includes an alarm device; the battery management system is also electrically connected to the alarm device, and the battery management system is also used to control the alarm device to sound an alarm when the battery pack has thermal runaway.

[0025] Compared with the prior art, the battery pack thermal runaway processing device and vehicle described in the utility model have the following advantages:

[0026] The battery pack thermal runaway processing device of the utility model includes an exhaust pipe and a storage tank. The exhaust pipe is used to be connected to the battery pack to discharge the smoke generated by the thermal runaway of the battery pack. The storage tank is connected to the exhaust pipe and is used to store impurities in the smoke discharged by the exhaust pipe. By arranging the storage tank on the exhaust pipe to store impurities in the smoke generated by the thermal runaway of the battery pack, the risk of the exhaust pipe being blocked by impurities in the smoke is reduced, and the exhaust smoothness of the exhaust pipe is improved.

[0027] The vehicle of the utility model has the same or similar advantages as the prior art and the aforementioned battery pack thermal runaway processing device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0029] Figure 1 It is a schematic diagram of a battery pack thermal runaway processing device in an embodiment of the utility model;

[0030] Figure 2 It is a schematic diagram of the connection part between an exhaust pipe and a storage tank in an embodiment of the utility model;

[0031] Figure 3 yes Figure 1 A schematic cross-sectional view cut along the AA direction;

[0032] Figure 4 yes Figure 1 Another cross-sectional schematic diagram cut along the AA direction.

[0033] Description of reference numerals:

[0034] 1-battery pack, 10-battery management system, 2-exhaust pipe, 21-first tube body, 22-second tube body, 23-second opening, 20-first opening, 3-smoke filtering device, 4-storage tank, 5-smoke purification device, 6-explosion-proof valve, 7-pressure regulating valve, 8-vacuum pump, 9-pressure gauge. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the utility model can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0037] It should be understood that the reference to "some embodiments" throughout the specification means that specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the utility model. Therefore, the "in some embodiments" appearing in various places throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0038] The following describes in detail a battery pack thermal runaway processing device and a vehicle provided by the utility model by listing specific embodiments.

[0039] Reference Figure 1 The battery pack thermal runaway processing device includes an exhaust pipe 2 and a storage tank 4; the exhaust pipe 2 is used to be connected to the battery pack 1 to discharge the smoke generated by the thermal runaway of the battery pack 1; the storage tank 4 is connected to the exhaust pipe 2, and the storage tank 4 is used to store impurities in the smoke discharged from the exhaust pipe 2.

[0040] Specifically, the battery pack thermal runaway processing device of the embodiment of the utility model is used to discharge the smoke generated by the thermal runaway of the battery pack. The battery pack 1 includes multiple battery cells, and the multiple battery cells form the charging and discharging unit of the battery pack 1, which provides power output for new energy vehicles through discharge. The battery cells will generate heat during the charging and discharging process, causing the temperature of the battery cells and the battery pack 1 to rise. The excessively high temperature environment is not conducive to the normal operation of the battery cells. Therefore, the battery pack 1 is usually also provided with heat dissipation components such as liquid cooling plates to dissipate heat and cool the battery cells, so as to ensure that the temperature in the battery pack 1 is normal.

[0041] However, in the case of excessive use of the battery pack 1 or failure of the heat dissipation component, the temperature inside the battery cell and the battery pack 1 is too high, which can easily lead to thermal runaway of the battery cell. The thermal runaway battery cell will produce a large amount of smoke, which contains toxic gases such as hydrogen fluoride, carbon monoxide, and hydrocarbon mixtures. If these fumes enter the passenger compartment, they will cause poisoning and suffocation of the occupants, threatening the safety of the occupants' lives. Figure 1 As shown, the battery pack thermal runaway processing device of the utility model includes an exhaust pipe 2, which is assembled and connected with the battery pack 1. The smoke generated by the thermal runaway battery cell can be discharged out of the vehicle through the exhaust pipe 2 to ensure the life safety of the occupants in the passenger compartment. In some embodiments, the exhaust pipe 2 can be made of heat-resistant, corrosion-resistant and resistant materials to extend the service life of the exhaust pipe 2. At the same time, the exhaust pipe 2 can be used as a part of the vehicle exhaust pipe to improve the integration of the whole vehicle.

[0042] The flue gas usually contains a large amount of impurities, including but not limited to some undecomposed particulate matter and electrolyte vapor produced after the electrolytic reaction of the electrolyte. For example, the electrolyte in the thermal runaway battery cell will be decomposed and volatilized by heat to form a large amount of electrolyte vapor. The impurities in the flue gas include electrolyte vapor. When the exhaust pipe 2 is used for a long time, the residue of a large amount of electrolyte vapor is easy to block the exhaust pipe 2, affecting the exhaust effect of the exhaust pipe 2. The battery pack thermal runaway processing device of the utility model also includes a storage tank 4, which is connected to the exhaust pipe 2. Impurities such as electrolyte vapor discharged from the exhaust pipe 2 can be collected in the storage tank 4 to avoid the exhaust pipe 2 from being blocked and exhausting smoothly in the case of long-term use, thereby ensuring the exhaust effect of the exhaust pipe 2. At the same time, the storage tank 4 can be set as a detachable structure from the exhaust pipe 2, or the storage tank 4 is provided with a sewage outlet for discharging impurities, so as to facilitate the unified cleaning of impurities and avoid secondary pollution of the vehicle environment caused by impurities.

[0043] It should be noted that the connection between the storage tank 4 and the exhaust pipe 2 can be connected by fastener assembly, so as to facilitate the disassembly, cleaning, inspection and maintenance of the storage tank 4, or it can be welded together to ensure the reliability of the connection between the two. In some embodiments, a cleaning port can be set on the tank body of the storage tank 4. When the personnel clean the impurities in the storage tank 4 later, the impurities can be directly discharged through the cleaning port to achieve the rapid cleaning of the storage tank 4. In addition, in order to avoid the leakage of impurities in the process of exhaust pipe 2 discharging flue gas impurities into the storage tank 4, a seal can be set at the part where the storage tank 4 is connected to the exhaust pipe 2. The seal can be made of rubber, silicone, etc., and the specific type is not limited in this embodiment. Exemplary, in some embodiments, part of the pipe wall of the exhaust pipe 2 is connected to the storage tank 4. In this case, the seal can be a semicircular structure or an arc structure, and the part of the pipe wall surrounding the exhaust pipe 2 is arranged between the exhaust pipe 2 and the storage tank 4. In other embodiments, the exhaust pipe 2 is inserted into the storage tank 4 and connected to the storage tank 4 . In this case, the sealing member is a circular structure, and the pipe wall surrounding the exhaust pipe 2 is disposed between the exhaust pipe 2 and the storage tank 4 .

[0044] In summary, the battery pack thermal runaway processing device of the present invention includes an exhaust pipe and a storage tank. The exhaust pipe is used to be connected to the battery pack to discharge the smoke generated by the thermal runaway of the battery pack. The storage tank is connected to the exhaust pipe to store impurities in the smoke discharged from the exhaust pipe, thereby reducing the risk of impurities in the smoke causing blockage of the exhaust pipe 2 and improving the exhaust smoothness of the exhaust pipe 2.

[0045] Optionally, the exhaust pipe 2 is provided with an opening, the storage tank 4 is connected to the opening, and impurities in the flue gas are discharged into the storage tank 4 through the opening.

[0046] Specifically, an opening is provided on the exhaust pipe 2, and the storage tank 4 is connected to the portion of the exhaust pipe 2 where the opening is provided, that is, along the direction perpendicular to the axis of the exhaust pipe 2, the projection of the opening on the exhaust pipe 2 is located in the storage tank 4, and impurities in the flue gas can be discharged into the storage tank 4 through the opening. The opening can be provided at any portion such as the middle or end of the exhaust pipe 2, and can be specifically provided according to the position of the storage tank 4, to ensure that the impurities discharged through the opening can smoothly fall into the storage tank 4. The provision of the opening makes it easier to discharge impurities in the flue gas, thereby further reducing the risk of the exhaust pipe 2 being blocked by impurities.

[0047] Optionally, refer to Figure 1 The device also includes a smoke filter device 3; the smoke filter device 3 is arranged in the exhaust pipe 2 and is used to filter impurities in the smoke.

[0048] Specifically, the flue gas filter 3 is arranged in the exhaust pipe 2. The main component of the flue gas filter 3 is activated carbon. The activated carbon is prepared by pyrolysis and activation of carbon-containing raw materials such as wood, coal and petroleum coke. The activated carbon has a developed pore structure, so it has a strong adsorption capacity. The activated carbon can absorb the waste gas formed by the thermal decomposition and volatilization of the electrolyte and liquefy it to form electrolyte vapor. The activated carbon can also absorb and block some undecomposed particulate matter in the flue gas, thereby filtering impurities in the flue gas, further reducing the risk of blockage of the exhaust pipe 2 caused by impurities in the flue gas, and improving the exhaust smoothness of the exhaust pipe 2.

[0049] Optionally, refer to Figures 2 to 4 The opening includes a first opening 20 , and the first opening 20 is arranged on the pipe wall of the exhaust pipe 2 where the smoke filtering device 3 is arranged.

[0050] Specifically, the first opening 20 is provided on the tube wall of the exhaust pipe 2 where the smoke filter device 3 is provided, and the impurities filtered by the smoke filter device 3 can be discharged from the first opening 20 into the storage tank 4, wherein the first opening 20 is mainly used to discharge the electrolyte vapor in the smoke. For example, the first opening 20 can be a mesh structure opened on the tube wall, and these meshes can be arranged along the axial direction of the exhaust pipe 2, or along the axial direction surrounding the exhaust pipe 2. In addition, when the smoke filter device 3 itself has a rigid supporting function, the first opening 20 can also be a gap that cuts off the exhaust pipe 2 in the axial direction surrounding the exhaust pipe 2. The specific shape and structure of the first opening 20 can be set according to the material of the exhaust pipe 2 and the smoke filter device 3, and this embodiment of the utility model is not limited to this. In this embodiment, the smoke mainly flows along Figure 2 The flue gas flows in the direction indicated by the sequence number ①, and part of the electrolyte vapor in the flue gas is discharged into the storage tank 4 through the first opening 20 on the exhaust pipe 2 during the flow.

[0051] Optionally, refer to Figure 2 The exhaust pipe 2 has a hollow area on its wall, and the hollow area forms the first opening 20. The number of the hollow areas is at least two, and at least two of the hollow areas are arranged on the wall of the exhaust pipe 2 at intervals.

[0052] Specifically, the first opening 20 is a hollow area opened on the wall of the exhaust pipe 2. The shape of the hollow area can be any shape such as a circle, an ellipse, a rectangle, a diamond, etc., and the specific shape is not limited in this embodiment. The structure of the hollow area is simple and easy to process, which helps to reduce the processing difficulty of the first opening 20 and control the processing cost of the first opening 20. The number of hollow areas can be one, two or more, such as Figure 2As shown, a plurality of smaller hollow areas are provided on the wall of the exhaust pipe 2, and the plurality of hollow areas are arranged at intervals, and the interval distance between two adjacent hollow areas can be the same or different. The plurality of hollow areas arranged at intervals are more helpful in improving the discharge effect of impurities in the flue gas.

[0053] Optionally, refer to Figures 2 to 4 The opening includes a second opening 23 , and the second opening 23 is located on a side of the smoke filtering device 3 close to the battery pack 1 .

[0054] Specifically, since the impurities in the flue gas also include a large number of particulate matter that has not been decomposed after the electrolysis reaction of the electrolyte, a large amount of particulate matter can easily cause blockage of the flue gas filter device 3. Therefore, this embodiment provides a second opening 23 on the side of the flue gas filter device 3 close to the battery pack 1, so that the particulate impurities in the flue gas will first be discharged into the storage tank 4 through the second opening 23 on the exhaust pipe 2, and then filtered through the flue gas filter device 3, and the filtered electrolyte vapor is discharged into the storage tank 4 through the first opening 20 on the exhaust pipe 2, and the filtered flue gas is finally discharged outside the vehicle through the exhaust pipe 2.

[0055] like Figure 2 As shown, in some embodiments, the opening on the exhaust pipe 2 includes both a first opening 20 and a second opening 23. At this time, the exhaust pipe 2 can form two exhaust paths. The first exhaust path is that the smoke flows along the direction indicated by the arrow ①, and the smoke is filtered by the smoke filter device 3. The impurities such as the electrolyte vapor after filtration are discharged into the storage tank 4 through the first opening 20 at the part of the smoke filter device 3, and the filtered smoke is discharged out of the vehicle; the second exhaust path is that the smoke flows along the direction indicated by the arrow ②, and part of the smoke flows into the storage tank 4 through the second opening 23 of the smoke filter device 3 close to the battery pack 1, wherein the impurities such as the undecomposed particulate matter in the smoke are discharged into the storage tank 4 through the second opening 23, and the smoke in the storage tank 4 continues to flow to the smoke filter device 3 through the first opening 20, and is discharged out of the vehicle after being filtered by the smoke filter device 3. It should be noted that the above two exhaust paths are exhausted simultaneously during the exhaust process, and both the first opening 20 and the second opening 23 will play a role in screening out impurities during the exhaust process.

[0056] Optionally, refer to Figure 3 and Figure 4 , the second opening is arranged on the tube wall of the exhaust pipe 2; or, the exhaust pipe 2 is segmented to form a first tube body 21 and a second tube body 22, the first tube body 21 and the second tube body 22 are arranged at intervals, and the second opening 23 is formed between the first tube body 21 and the second tube body 22.

[0057] Specifically, in some embodiments, Figure 3As shown, the second opening 23 is provided on the wall of the exhaust pipe. The second opening 23 can be a notch opened on the wall of the exhaust pipe 2, or a hollow area opened on the wall of the exhaust pipe 2. The shape of the second opening 23 can be any shape such as a circle, an ellipse, a rectangle, a diamond, etc., and the specific shape is not limited in this embodiment. The number of the second openings 23 can also be one, two or more. For example, a plurality of smaller notches can be opened on the wall of the exhaust pipe 2, and a larger hollow area can also be opened on the wall of the exhaust pipe 2.

[0058] In some embodiments, Figure 4 As shown, if the content of impurities such as particulate matter in the flue gas generated by the battery pack 1 in the thermal runaway state is large, the exhaust pipe 2 can also be set to a segmented structure, so that the exhaust pipe 2 forms a first tube body 21 and a second tube body 22, and the flue gas filter device 3 is arranged in the first tube body 21, and the first tube body 21 and the second tube body 22 are arranged at intervals, and a second opening 23 is formed between the first tube body 21 and the second tube body 22. In this case, the opening space of the second opening 23 is larger, which is more conducive to the discharge of a large number of impurities such as particulate matter, avoids the accumulation of impurities, improves the timeliness of the discharge of impurities in the flue gas, and improves the smoothness of the exhaust of the exhaust pipe 2. In addition, in this embodiment, the first tube body 21 and the second tube body 22 can be coaxially arranged, that is, the axes of the first tube body 21 and the second tube body 22 are on the same straight line, so that the first tube body 21 and the second tube body 22 form a linear exhaust path, which is more conducive to the smooth flow of flue gas in the exhaust pipe 2, thereby improving the exhaust efficiency. On this basis, the first tube body 21 and the second tube body 22 can also be set to have the same diameter to improve the uniformity of the flue gas flow.

[0059] Optionally, refer to Figures 2 to 4 , the storage tank 4 is arranged below the opening along the direction of gravity.

[0060] Specifically, the storage tank 4 is arranged below the first opening 20 and / or the second opening 23 along the direction of gravity, so that impurities in the flue gas can fall directly into the storage tank 4 under the action of gravity. For example, the electrolyte vapor can drip directly into the storage tank 4 under the action of gravity, and the undecomposed particulate matter in the electrolysis reaction can also fall directly into the storage tank 4 under the action of gravity, thereby making it easier to collect impurities in the flue gas.

[0061] Optionally, refer to Figures 2 to 4 At least a portion of the exhaust pipe 2 is inserted into the storage tank 4 , and the opening is located in the storage tank 4 .

[0062] Specifically, if Figure 3As shown, two opposite side walls of the storage tank 4 are provided with through holes, and the exhaust pipe 2 passes through the two through holes, so that at least part of the exhaust pipe 2 is inserted into the storage tank 4. At the same time, at least part of the smoke filter 3 is located in the exhaust pipe 2 in the storage tank 4, and the first opening 20 and / or the second opening 23 on the exhaust pipe 2 are both located in the storage tank 4, thereby ensuring that the impurities filtered out by the smoke filter 3 can be collected in the storage tank 4, and even if smoke leakage occurs, the smoke will leak into the storage tank 4 and will not spread to the vehicle interior environment or the external environment, thereby further improving the safety of the smoke emission process and the smoke emission efficiency. In some embodiments, most of the smoke filter 3 can be arranged to be located in the storage tank 4, or the entirety of the smoke filter 3 can be arranged to be located in the storage tank 4, so as to be more conducive to the discharge of impurities in the smoke.

[0063] Optionally, refer to Figure 1 The battery pack thermal runaway processing device also includes a flue gas purification device 5; the flue gas purification device 5 is arranged in the exhaust pipe 2, and the flue gas purification device 5 is located on the side of the flue gas filter device 3 away from the battery pack 1; the flue gas purification device 5 is used to purify the flue gas.

[0064] Specifically, if Figure 1 As shown, the embodiment of the utility model is further provided with a flue gas purification device 5 on the basis of the flue gas filter device 3. The flue gas purification device 5 is arranged in the exhaust pipe 2. The flue gas purification device 5 is composed of alkaline substances, oxidants, etc. The alkaline substances can react chemically with toxic gases such as hydrogen fluoride, carbon monoxide, hydrocarbon mixtures, etc. in the flue gas to generate water and some gases that are harmless to the atmospheric environment, thereby purifying the flue gas and improving the environmental protection of the battery pack thermal runaway treatment device. It should be noted that the flue gas purification device 5 is located on the side of the flue gas filter device 3 away from the battery pack 1. The flue gas generated by the thermal runaway battery cell is filtered by the flue gas filter device 3 before entering the flue gas purification device 5 for purification, so as to avoid the blockage of the flue gas purification device 5 caused by impurities such as electrolyte waste gas and particulate matter in the flue gas.

[0065] Optionally, refer to Figure 1 The battery pack 1 includes an explosion-proof valve 6, and the exhaust pipe 2 is connected to the explosion-proof valve 6.

[0066] Specifically, when the battery pack 1 is short-circuited internally or externally, overcharged, or collided, the internal structure of the battery pack 1 is easily damaged, causing the battery to heat up, swell, etc., resulting in an increase in the internal pressure of the battery pack 1. If the battery pack 1 cannot release the pressure in time, it will explode, causing serious safety hazards. Therefore, the battery pack 1 is usually provided with an explosion-proof valve 6, such as Figure 1As shown, the explosion-proof valve 6 is arranged at the end cover of the battery pack 1. Before the gas pressure in the battery pack 1 reaches the explosion limit, the explosion-proof valve 6 will break and release the gas in the battery pack 1, thereby preventing the battery pack 1 from exploding and ensuring the safety of the battery pack 1. The exhaust pipe 2 is connected to the explosion-proof valve 6. If the battery cell in the battery pack 1 has thermal runaway, the gas generated by the thermal runaway battery cell will be discharged into the exhaust pipe 2 through the explosion-proof valve 6 and then discharged outside the vehicle. Figure 1 As shown, the battery pack 1 in the embodiment of the utility model includes two explosion-proof valves 6, so that the exhaust pipe 2 includes a main pipeline and two branch pipelines, one end of the two branch pipelines is respectively connected to the two explosion-proof valves 6, and the other end is connected to the main pipeline, and the smoke filter device 3 and the smoke purification device 5 are both arranged in the main pipeline. The explosion-proof valve 6 of this embodiment can be a membrane explosion-proof valve, which is more conducive to the discharge of smoke after thermal runaway of the battery pack.

[0067] Optionally, refer to Figure 1 The battery pack thermal runaway processing device also includes an air pump 8, which is connected to the end of the exhaust pipe 2 away from the battery pack 1.

[0068] Specifically, in order to accelerate the discharge of thermal runaway smoke, Figure 1 As shown, the embodiment of the utility model is also provided with an air pump 8, which is connected to the end of the exhaust pipe 2 away from the battery pack 1. The air pump 8 is electrically connected to the BMS (Battery Management System) 10, and the battery management system 10 is used for intelligent management and maintenance of each battery unit, monitoring the battery status, preventing the battery from overcharging and over-discharging, and extending the service life of the battery. The battery management system 10 can control the opening and closing of the air pump 8. When the air pump 8 is turned on, the air pump 8 can extract the smoke from the exhaust pipe 2, thereby accelerating the exhaust speed of the device, improving the exhaust efficiency, and effectively inhibiting the smoke generated by the thermal runaway battery cell from spreading to the passenger compartment. At the same time, the higher exhaust efficiency can also accelerate the heat dissipation and cooling of the battery pack 1, which helps to slow down the spread of thermal runaway.

[0069] Optionally, refer to Figure 1 The battery pack thermal runaway processing device also includes a pressure regulating valve 7, which is connected to the exhaust pipe 2 and is used to adjust the pressure in the exhaust pipe 2.

[0070] Specifically, in some embodiments, the pressure regulating valve 7 is connected to the exhaust pipe 2. If the vacuum pump 8 overworks, the pressure in the exhaust pipe 2 will be too low. When the pressure difference between the pressure in the exhaust pipe 2 and the pressure of the battery cells in the battery pack 1 is greater than the opening pressure of the explosion-proof valve 6, the explosion-proof valve of the battery cells that are not out of control will be opened. At this time, the pressure regulating valve 7 can adjust the pressure in the exhaust pipe 2 to ensure that the pressure in the exhaust pipe 2 is within a reasonable range, and control the pressure difference between the pressure in the exhaust pipe 2 and the pressure of the battery cells in the battery pack 1 to be less than the opening pressure of the explosion-proof valve 6, thereby ensuring the safety of the battery cells that are not out of control. Exemplarily, the pressure regulating valve 7 can be connected to the side of the exhaust pipe 2 close to the battery pack 1, that is, connected to the pipeline between the smoke filter device 3 and the battery pack 1, so as to avoid the smoke filter device 3 affecting the pressure regulating effect of the pressure regulating valve 7. Optionally, refer to Figure 1 The battery pack thermal runaway processing device also includes a pressure gauge 9, which is connected to the exhaust pipe 2 and is used to monitor the pressure in the exhaust pipe 2.

[0071] Specifically, if Figure 1 As shown, the pressure gauge 9 is connected to the exhaust pipe 2 to monitor the pressure in the exhaust pipe 2. When the battery pack 1 is working normally, the explosion-proof valve 6 is closed, and the battery pack 1 is not connected to the exhaust pipe 2. After the battery cell in the battery pack 1 has thermal runaway, the explosion-proof valve 6 explodes, and the explosion-proof valve 6 is connected to the exhaust pipe 2, and the pressure in the exhaust pipe 2 changes. When the pressure gauge 9 detects that the pressure in the exhaust pipe 2 changes, the pressure gauge 9 feeds back a pressure signal to the battery management system 10. The battery management system 10 controls the vacuum pump 8 to start according to the received pressure signal, so that the vacuum pump 8 vacuums the exhaust pipe 2, thereby accelerating the exhaust speed and controlling the air pressure balance in the exhaust pipe 2. In some embodiments, the pressure gauge 9 can be connected to the pipeline of the exhaust pipe 2 close to the battery pack 1 to avoid the smoke filter device 3, the smoke purification device 5, etc. from affecting the monitoring results of the pressure gauge 9, thereby improving the accuracy of the detection results.

[0072] The utility model also provides a vehicle, comprising the battery pack thermal runaway processing device as described in any one of the above items.

[0073] Specifically, the vehicle is equipped with a battery pack thermal runaway processing device according to any of the aforementioned embodiments. When thermal runaway occurs in the battery pack 1 during driving of the vehicle, the battery pack thermal runaway processing device can promptly discharge the smoke generated by the thermal runaway cells in the battery pack out of the vehicle. The exhaust efficiency is high and the effect is reliable, and the smoke can be prevented from entering the passenger compartment, thereby ensuring the life safety of the occupants and improving the safety of the vehicle.

[0074] Optionally, the vehicle further includes a battery management system 10 and a green clean system; the battery management system 10 is electrically connected to the battery pack 1 and the green clean system respectively, and the battery management system 10 is used to control the green clean system to start when the battery pack 1 has thermal runaway.

[0075] Specifically, the vehicle also includes a battery management system 10 and a green cleaning system. The battery management system 10 is electrically connected to the battery pack 1 and is used to intelligently manage, monitor and maintain each battery unit in the battery pack 1 to prevent the battery pack 1 from being overcharged and over-discharged, thereby extending the service life of the battery pack 1. The green cleaning system includes components such as a PM2.5 rapid tester, a high-efficiency filter, a negative ion brush plate and an electrostatic filter. When turned on, the passenger compartment can be ventilated and the cleaned air can be injected into the passenger compartment to keep the air in the passenger compartment clean. The battery management system 10 is electrically connected to the green cleaning system. When the battery management system 10 detects that the battery pack 1 has thermal runaway, it will control the green cleaning system to start, so that the green cleaning system can clean the air in the passenger compartment, which can effectively reduce the smoke concentration in the passenger compartment and prevent the passengers from inhaling excessive smoke, thereby protecting the lives of the passengers to the greatest extent and improving the safety of the vehicle.

[0076] Optionally, the vehicle further includes an alarm device; the battery management system 10 is also electrically connected to the alarm device, and the battery management system 10 is also used to control the alarm device to sound an alarm when the battery pack 1 has thermal runaway.

[0077] Specifically, the battery management system 10 is also connected to an alarm device, which can be any type such as an indicator light, a speaker, a display screen, etc. When the battery management system 10 detects that the battery pack 1 has thermal runaway, the alarm device can be controlled to sound an alarm to prompt the occupants to escape as soon as possible.

[0078] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack thermal runaway treatment device, used to discharge smoke generated by thermal runaway of a battery pack (1), characterized in that: The device comprises an exhaust pipe (2) and a storage tank (4); The exhaust pipe (2) is used to be connected to the battery pack (1) so as to discharge smoke generated by thermal runaway of the battery pack (1); The storage tank (4) is connected to the exhaust pipe (2), and the storage tank (4) is used to store impurities in the flue gas discharged from the exhaust pipe (2).

2. The battery pack thermal runaway processing device according to claim 1, characterized in that: The exhaust pipe (2) is provided with an opening, the storage tank (4) is connected to the opening, and impurities in the flue gas are discharged into the storage tank (4) through the opening.

3. The battery pack thermal runaway processing device according to claim 2, characterized in that: The device also includes a smoke filtering device (3); The smoke filter device (3) is arranged in the exhaust pipe (2) and is used to filter impurities in the smoke.

4. The battery pack thermal runaway processing device according to claim 3, characterized in that: The opening comprises a first opening (20), and the first opening (20) is arranged on the pipe wall of the exhaust pipe (2) where the smoke filtering device (3) is arranged.

5. The battery pack thermal runaway processing device according to claim 4, characterized in that: A hollow area is provided on the wall of the exhaust pipe (2), and the hollow area forms the first opening (20).

6. The battery pack thermal runaway processing device according to claim 5, characterized in that: The number of the hollow areas is at least two, and at least two of the hollow areas are arranged at intervals on the wall of the exhaust pipe (2).

7. The battery pack thermal runaway processing device according to claim 3, characterized in that: The opening comprises a second opening (23), and the second opening (23) is located on a side of the smoke filter device (3) close to the battery pack (1).

8. The battery pack thermal runaway processing device according to claim 7, characterized in that: The second opening (23) is arranged on the wall of the exhaust pipe (2); Alternatively, the exhaust pipe (2) is segmented into a first tube body (21) and a second tube body (22), the first tube body (21) and the second tube body (22) are arranged at an interval, and the second opening (23) is formed between the first tube body (21) and the second tube body (22).

9. The battery pack thermal runaway processing device according to any one of claims 2 to 8, characterized in that: The material storage tank (4) is arranged below the opening along the direction of gravity.

10. The battery pack thermal runaway processing device according to any one of claims 2 to 8, characterized in that: At least a portion of the exhaust pipe (2) is inserted into the material storage tank (4), and the opening is located inside the material storage tank (4).

11. The battery pack thermal runaway processing device according to claim 3, characterized in that: It also includes a flue gas purification device (5); The flue gas purification device (5) is arranged in the exhaust pipe (2), and the flue gas purification device (5) is located on a side of the flue gas filtering device (3) away from the battery pack (1); the flue gas purification device (5) is used to purify the flue gas.

12. The battery pack thermal runaway processing device according to claim 1, characterized in that: It also comprises a pressure regulating valve (7), which is connected to the exhaust pipe (2) and is used to regulate the pressure in the exhaust pipe (2).

13. The battery pack thermal runaway processing device according to claim 1, characterized in that: It also includes an air pump (8), which is connected to the end of the exhaust pipe (2) away from the battery pack (1).

14. The battery pack thermal runaway processing device according to claim 1, characterized in that: It also comprises a pressure gauge (9), which is connected to the exhaust pipe (2) and is used to monitor the pressure in the exhaust pipe (2).

15. The battery pack thermal runaway processing device according to claim 14, characterized in that: The pressure gauge (9) is connected to the pipeline of the exhaust pipe (2) on a side close to the battery pack (1).

16. A vehicle, characterized in that: A battery pack thermal runaway processing device comprising the battery pack thermal runaway processing device according to any one of claims 1 to 15.

17. The vehicle according to claim 16, characterized in that Also includes a battery management system (10) and a green cleaning system; The battery management system (10) is electrically connected to the battery pack thermal runaway processing device and the green clean system respectively, and the battery management system (10) is used to control the green clean system to start when the battery pack (1) is in thermal runaway.

18. The vehicle according to claim 17, characterized in that It also includes an alarm device; The battery management system (10) is also electrically connected to the alarm device, and the battery management system (10) is also used to control the alarm device to sound an alarm when the battery pack (1) experiences thermal runaway.

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