Power supply system and vehicle

Abstract

The invention relates to a power supply system and a vehicle. The power supply system comprises a box body, a battery and at least one purification device. The battery and the purification device are arranged in the box body. The box body comprises an exhaust port, the exhaust end of the purification device is connected with the exhaust port of the box body, and the exhaust end of the purification device is communicated with the first cavity of the shell of the purification device. The gas in the box body is discharged out of the box body after being treated by the purification device, so that the cleanliness of the discharged gas flow is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle battery components, and in particular to a power supply system and a vehicle. Background Art

[0002] Electric vehicle batteries may experience thermal runaway problems in the event of overheating, overcharging, squeezing and collision, which may lead to fire and explosion in severe cases. In addition to the dangers of high temperature and instantaneous high voltage, thermal runaway of batteries also produces a large amount of particulate matter and gas, which poses significant risks to the environment and the health of drivers and passengers.

[0003] The Chinese patent (CN117374508B) proposes a battery pack structure that can ensure that hot gas can be smoothly discharged from the pressure relief mechanism when the battery is in thermal runaway, inhibit the shell from bursting, and improve the safety performance of the battery, but it does not involve the treatment of particulate matter and harmful gases generated by the battery cell after thermal runaway. The Chinese patent (CN216507912U) proposes a battery thermal runaway warning calibration method to solve the technical problem of false alarms of warning signals in the prior art during thermal runaway. When the method is applied, the probability of correctly issuing a warning when the battery cell is in thermal runaway is greatly improved, that is, when there is no thermal runaway, the warning signal will not be triggered by mistake, but the particulate matter and harmful gases generated after thermal runaway are not treated.

[0004] Therefore, we need to find a better way to deal with the comprehensive treatment system of particulate matter and harmful gases generated after thermal runaway of electric vehicles to ensure that the safety performance of electric vehicles and their battery systems can be further effectively controlled and guaranteed. Summary of the invention

[0005] The purpose of the present invention is to provide a power supply system and a vehicle, which can filter the gas, particulate matter and harmful substances generated by thermal runaway of the battery, and improve the cleanliness of the airflow discharged from the box.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] According to the first aspect of the present application, a power supply system is provided. The power supply system includes: a box, a battery and at least one purification device. The battery and the purification device are both arranged in the box. The box includes an exhaust port, the exhaust end of the purification device is connected to the exhaust port of the box, and the exhaust end of the purification device is connected to the first cavity of the shell of the purification device.

[0008] Beneficial effects of the present invention: By arranging a purification device at the exhaust port of the box, when the battery is in thermal runaway, the generated gas and particulate matter can be filtered and processed by the purification device, and the gas in the box is discharged from the box after being processed by the purification device, thereby improving the cleanliness of the discharged airflow. In some embodiments, a first end of the first side wall of the shell of the purification device is connected to a fixing member, the fixing member is connected to the box, and the first opening of the first side wall is connected to the exhaust port of the box.

[0009] In some embodiments, the power supply system further includes: an air duct disposed in the box body, the exhaust end of the air duct being connected to the exhaust port of the box body; the purification device is located in the air duct, and the first opening of the first side wall is connected to the exhaust port of the box body.

[0010] In some embodiments, the power supply system further includes: an exhaust valve, which is disposed outside the box and connected to the exhaust port.

[0011] In some embodiments, the housing includes a plurality of exhaust ports and a plurality of purification devices, one purification device is correspondingly connected to one exhaust port, and the number of purification devices is less than or equal to the number of exhaust ports.

[0012] In some embodiments, the purification device includes: a housing and a filter assembly. The housing includes a first side wall, the first side wall encloses a first cavity, the first side wall has a first end and a second end opposite to each other along a first direction, the first end of the first side wall has a first opening, the first opening connects the first cavity with the outside of the housing; the first side wall also includes a plurality of first through holes, the plurality of first through holes connect the first cavity with the outside of the housing. The first side wall of the housing is configured to filter the first particulate matter.

[0013] The main body of the filter assembly is disposed in the first cavity, and the main body includes a second cavity, the second cavity is connected to the first cavity, and the second cavity is connected to the outside of the shell through the first opening. The filter assembly is configured to filter the second particulate matter. The minimum diameter of the first particulate matter is greater than the maximum diameter of the second particulate matter.

[0014] In some embodiments, the main body of the filter assembly includes: a second side wall and a filter structure. The second side wall encloses a second cavity, and the second side wall includes a plurality of second through holes, and the plurality of second through holes connect the first cavity and the second cavity. The filter structure surrounds the second side wall, and the filter structure contacts the inner surface of the first side wall.

[0015] In some embodiments, the filtering structure is also in contact with the outer surface of the second sidewall.

[0016] In some embodiments, a diameter or an equivalent diameter of the second through hole is greater than a diameter or an equivalent diameter of the first through hole.

[0017] In some embodiments, along the first direction, the size of the filter structure is smaller than or equal to the size of the second sidewall. The filter structure covers the plurality of second through holes.

[0018] In some embodiments, along the first direction, a size of the filtering structure is smaller than or equal to a size of the first sidewall.

[0019] In some embodiments, the filter structure includes a first filter element surrounding the second side wall, the first filter element contacts the inner surface of the first side wall and covers a plurality of first through holes. The first filter element is configured to filter the second particulate matter. The porosity of the material of the first filter element is greater than or equal to 90%.

[0020] In some embodiments, the filter structure includes: a second filter element surrounding the second side wall, the second filter element being located between the second side wall and the first filter element. The second filter element is configured to absorb harmful chemicals in the air and / or convert harmful chemicals in the air into harmless substances.

[0021] In some embodiments, the second filter element contacts an outer wall of the second side wall.

[0022] In some embodiments, the sum of the thicknesses of the first filter element and the second filter element is equal to the distance between the first side wall and the second side wall.

[0023] In some embodiments, the shapes of the outer boundaries of the cross-sections of the second sidewall, the first filter element, and the second filter element include a circle, an ellipse, or a polygon.

[0024] In some embodiments, along the first direction, the size of the first filter element is the same as or substantially the same as the size of the second sidewall; and / or, along the first direction, the size of the second filter element is the same as or substantially the same as the size of the second sidewall.

[0025] In some embodiments, the second side wall has a first end and a second end opposite to each other along a first direction, and the filter assembly further comprises: a first card and a second card and a component. The first card and the component are annular, and the inner wall of the first card and the component is connected to the first end of the second side wall. The second card and the component are annular, and the inner wall of the second card and the component is connected to the second end of the second side wall. Wherein, the filter structure has a first end and a second end opposite to each other along the first direction. Along the first direction, the distance between the first card and the component and the second card and the component is greater than or equal to the size of the filter structure.

[0026] In some embodiments, the inner wall of the first card and piece is coplanar with the outer wall of the second side wall; and / or, the inner wall of the second card and piece is coplanar with the outer wall of the second side wall. The inner diameter of the card and piece at both ends of the frame is the same as the inner diameter of the frame body.

[0027] In some embodiments, a first end of the filter structure contacts a first card and a member; and / or a second end of the filter structure contacts a second card and a member.

[0028] In some embodiments, the second card and the member are located in the first cavity, the outer wall of the second card and the member matches the shape of the inner wall of the first side wall, and the outer wall of the second card and the member contacts the first side wall.

[0029] In some embodiments, the purification device further includes: a fixing member, one end of which is connected to the first end of the first side wall. The fixing member has a second opening, and the second opening is connected to the first opening of the first end of the shell. The fixing member includes: a first concave platform arranged on the inner wall of the second opening, and the first clamp and member are located on a side of the first concave platform away from the first side wall and in contact with the first concave platform.

[0030] In some embodiments, the shape of the inner wall of the first recess matches the shape of the inner wall of the first side wall. Along the first direction, the size of the first recess is the same or substantially the same as the size of the first card and member.

[0031] In some embodiments, along the first direction, the sum of the distance between the first card and the second card and the second card is smaller than the distance between the first recess and the second end of the second side wall.

[0032] In some embodiments, along the first direction, the absolute value of the difference between the sum of the distance between the first card and the second card and the second card and the size of the second card and the distance between the first recess and the second end of the second side wall is greater than or equal to 2 mm.

[0033] In some embodiments, the purification device further includes: a pressure relief component, which is disposed on one side of the first side wall along the first direction and connected to the second end of the first side wall. The pressure relief component is configured to open and release pressure when the air pressure in the first cavity is greater than or equal to a set threshold value, so that the air pressure in the first cavity is maintained within a set range.

[0034] In some embodiments, the pressure relief assembly includes: a first connector and a pressure-resistant member. The first connector is annular, and includes a first end and a second end opposite to each other along a first direction, and the first end of the first connector is connected to the second end of the first side wall. The pressure-resistant member is connected to the second end of the first connector. The pressure-resistant value of the pressure-resistant member is greater than or equal to 4 kPa and less than or equal to 6 kPa.

[0035] In some embodiments, the pressure relief assembly further includes: a second connecting member, the second connecting member is in the form of a ring, the second connecting member is connected to the second end of the first connecting member, and the outer wall of the second connecting member is coplanar with the outer wall of the first connecting member. The inner wall of the second connecting member matches the shape of the inner wall of the first connecting member, and the diameter or equivalent diameter of the inner wall of the second connecting member is smaller than the diameter or equivalent diameter of the inner wall of the first connecting member.

[0036] Among them, the pressure-resistant part is arranged on a side of the second connecting part away from the first connecting part and is connected to the second connecting part; or, the pressure-resistant part is arranged in the first connecting part; the surface of the pressure-resistant part away from the first side wall is connected to the second connecting part, and the outer wall of the pressure-resistant part is in contact with the inner wall of the second connecting part.

[0037] In some embodiments, the housing further comprises: a third connecting member, the third connecting member is annular, and the third connecting member is connected to the second end of the first side wall. The first connecting member surrounds the third connecting member and is connected to the third connecting member.

[0038] The pressure-resistant member is located at one end of the second connecting member away from the third connecting member; or, the pressure-resistant member is located between the second connecting member and the third connecting member, and the pressure-resistant member is in contact with the second connecting member and the third connecting member on two opposite sides along the first direction.

[0039] In some embodiments, the fixing member further includes: a second recessed platform disposed on the inner wall of the second opening, the second recessed platform surrounds the first recessed platform, and the second recessed platform is farther away from the first side wall than the first recessed platform.

[0040] The purification device further comprises: a first sealing member arranged on a surface of the second concave platform away from the first side wall, and the first sealing member is ring-shaped.

[0041] In some embodiments, the outer wall of the first sealing member matches the shape of the side wall of the second recessed platform, and the outer wall of the first sealing member contacts the side wall of the second recessed platform.

[0042] In some embodiments, the purification device further comprises: a second sealing member, which is annular in shape and is disposed in the first cavity and between the filter structure and the second end of the first side wall.

[0043] The diameter or equivalent diameter of the outer wall of the second seal is the same or approximately the same as the diameter or equivalent diameter of the inner wall of the first cavity; and / or the diameter or equivalent diameter of the inner wall of the second seal is the same or approximately the same as the diameter or equivalent diameter of the inner wall of the second cavity.

[0044] In some embodiments, the purification device further comprises: a third sealing member, which is annular in shape and is disposed in the first connecting member and between the pressure-resistant member and the second end of the first side wall.

[0045] The third sealing member surrounds the first connecting member and contacts the second end of the first side wall. The outer wall of the third sealing member matches the shape of the inner wall of the first connecting member, and the outer wall of the third sealing member contacts the inner wall of the first connecting member.

[0046] The inner wall of the third sealing member matches the shape of the outer wall of the third connecting member, and the inner wall of the third sealing member contacts the outer wall of the third connecting member; or, the third sealing member is arranged between the second connecting member and the third connecting member, and contacts the third connecting member.

[0047] The second aspect of the present application provides a vehicle, which includes a vehicle body and a power supply system as provided in any of the above embodiments, wherein the power supply system is arranged in the vehicle body.

[0048] The above-mentioned vehicle has the same structure and beneficial technical effects as the power supply system provided in some of the above-mentioned embodiments, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 Shown is a structural diagram of a purification device of some embodiments;

[0050] Figure 2 Shown are structural diagrams of housings of some embodiments;

[0051] Figure 3 A partial cross-sectional view of a filter assembly of some embodiments is shown;

[0052] Figure 4 Shown are partial cross-sectional views of the filtering structures of some embodiments;

[0053] Figure 5 A structural diagram showing a second side wall, a first card and a member, and a second card and a member of a filter structure of some embodiments;

[0054] Figure 6 Shown is a schematic diagram of the installation of the second seal of some embodiments;

[0055] Figure 7 Shown is a schematic diagram of the installation of a first seal member according to some embodiments;

[0056] Figure 8 Shown is a block diagram of a pressure relief assembly of some embodiments;

[0057] Fig. 9 Shown is a schematic diagram of the installation of a pressure relief assembly and a housing in some embodiments;

[0058] Fig.10 Shown are structural diagrams of housings of other embodiments;

[0059] Fig.11Shown is a schematic diagram of the installation of the third seal of some embodiments;

[0060] Fig.12 Shown is a block diagram of a power supply system according to some embodiments.

[0061] 100—power supply system;

[0062] 10—purification device; 20—box; 201—exhaust port; 30—battery; 40—airway; 50—exhaust valve;

[0063] 1—housing;

[0064] 11—first side wall; 111—first through hole; 12—third connecting member; Q1—first cavity; K1—first opening;

[0065] 2—Filter component;

[0066] 2a—main body;

[0067] 21—second side wall; 211—second through hole; Q2—second cavity;

[0068] 22—filter structure; 221—first filter element; 222—second filter element; 223—third filter element;

[0069] 2b—first card and piece; 2c—second card and piece;

[0070] 3—fixing member; 31—first concave platform; 32—second concave platform; K2—second opening;

[0071] 4—pressure relief assembly; 41—first connecting piece; 42—pressure-resistant piece; 43—second connecting piece;

[0072] 5—first seal;

[0073] 6—second sealing member;

[0074] 7—The third seal. DETAILED DESCRIPTION

[0075] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0076] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0077] For ease of understanding, the purification device 10, the power supply system 100 and the vehicle provided in the present application are specifically introduced below with reference to the accompanying drawings.

[0078] The purification device 10 and the power supply system 100 in the present application can be applied to vehicles, or to other transportation vehicles such as airplanes or ships. The following takes the application in vehicles as an example to illustrate some embodiments of the present application.

[0079] The embodiment of the present application provides a purification device 10 .

[0080] In some embodiments, Figure 1 As shown, the purification device 10 includes: a housing 1 and a filter assembly 2.

[0081] like Figure 1 and Figure 2 As shown, the housing 1 includes a first side wall 11, the first side wall 11 encloses a first cavity Q1, the first side wall 11 has a first end and a second end opposite to each other along a first direction X, the first end of the first side wall 11 has a first opening K1, the first opening K1 connects the first cavity Q1 with the outside of the housing 1; the first side wall 11 also includes a plurality of first through holes 111, the plurality of first through holes 111 connect the first cavity Q1 with the outside of the housing 1. The first side wall 11 of the housing 1 is configured to filter the first particulate matter.

[0082] like Figure 1 As shown, the main body 2a of the filter assembly 2 is disposed in the first cavity Q1, and the main body 2a includes a second cavity Q2, the second cavity Q2 is connected to the first cavity Q1, and the second cavity Q2 is connected to the outside of the housing 1 through the first opening K1. The filter assembly 2 is configured to filter the second particulate matter. The minimum diameter of the first particulate matter is greater than the maximum diameter of the second particulate matter.

[0083] Exemplarily, the first through hole 111 on the first side wall 11 may be a circular hole, an elliptical hole, a rectangular hole, or a hole of other shapes (e.g., a trapezoid, a parallelogram, a pentagon, a hexagon, a star, etc.). The diameter or equivalent diameter (the maximum diameter allowed to pass a sphere) of the first through hole 111 is greater than or equal to 1 mm and less than or equal to 3 mm.

[0084] When the first through hole 111 is a circular hole, the diameter of the circular hole is greater than or equal to 1 mm and less than or equal to 3 mm; when the first through hole 111 is a rectangular hole, the minimum width of the rectangle is greater than or equal to 1 mm and less than or equal to 3 mm; when the first through hole 111 is a hole of other shapes, the equivalent diameter of the first through hole 111 is greater than or equal to 1 mm and less than or equal to 3 mm.

[0085] In this way, when the airflow passes through the first side wall 11 and enters the first cavity Q1, the first particles with a size range of 1mm to 3mm are blocked outside the shell 1, and the first particles carried in the airflow are filtered and removed during the process of entering the first cavity Q1.

[0086] Exemplarily, the diameter of the second particles ranges from 0.1 micrometer to 1 micrometer.

[0087] By providing the filter assembly 2 , particulate matter (eg, particulate matter with a size greater than 1 micron) carried in the airflow can be further filtered and removed, thereby reducing the concentration of particulate matter carried in the gas discharged after passing through the purification device 10 .

[0088] In this embodiment, Figure 1 and Figure 2 As shown, the first opening K1 of the housing 1 connects the first cavity Q1 with the outside of the housing 1, and the second cavity Q2 of the filter assembly 2 is connected with the first cavity Q1 of the housing 1. External gas can enter the first cavity Q1 through the multiple first through holes 111 on the first side wall 11 of the housing 1, and then enter the second cavity Q2 from the first cavity Q1, and then be discharged from the first opening K1 of the housing 1. The second cavity Q2 of the filter assembly 2 is connected with the first cavity Q1 of the housing 1, ensuring that the airflow that has been filtered for the first time by the housing 1 can enter the filter assembly 2 for secondary filtering, further filtering and removing smaller particles in the airflow, so that the concentration of particles in the airflow discharged after being processed by the purification device 10 can be reduced to the target value.

[0089] The first side wall 11 serves as the air inlet surface of the purification device 10, and the first opening K1 at the first end of the first side wall 11 serves as the exhaust port of the purification device. When the airflow enters the first cavity Q1 through the multiple first through holes 111 on the first side wall 11, the first through holes 111 can preliminarily intercept larger particles in the airflow and only allow small particles and airflow to pass through, thereby achieving the first filtration. In the process of entering the first cavity Q1, the airflow is preliminarily filtered through the multiple first through holes 111, thereby intercepting larger particles, reducing the burden on the filter component 2, and preventing the filter component 2 from being blocked by large particles.

[0090] When the gas that has entered the first cavity Q1 and has been filtered once enters the second cavity Q2 of the filter component 2, small particles in the airflow will be filtered by the filter component 2, and only the airflow enters the second cavity Q2 of the filter component 2. The gas that has been filtered for the second time by the filter component 2 is discharged from the purification device 10 through the first opening K1, so that the airflow after being processed by the purification device 10 will not carry particles, thereby improving the cleanliness of the discharged airflow.

[0091] Exemplarily, the difference between the minimum value of the diameter of the first particle and the maximum value of the diameter of the second particle is greater than or equal to a first threshold; and / or the ratio of the difference between the minimum value of the diameter of the first particle and the maximum value of the diameter of the second particle to the maximum value of the diameter of the first particle is greater than or equal to the second threshold, and less than or equal to a third threshold.

[0092] Different types of pollutants (such as dust, chemical gases) have different particle diameters. The first through hole 111 on the housing 1 and the filter assembly 2 can grade and filter particles of different sizes. The first through hole 111 on the first side wall 11 of the housing 1 first preliminarily filters larger particles (first particles), so that the gas entering the first cavity Q1 is preliminarily filtered gas carrying smaller particles (second particles); then, the filter assembly 2 performs a secondary filtration on the small particles, and the particles in the gas filtered by the filter assembly 2 are further removed. By adjusting the first threshold, the second threshold, and the third threshold, the filtering standard can be adjusted according to actual needs, so that the purification device can adapt to a variety of environments and usage scenarios, enhancing the flexibility and adaptability of the system.

[0093] By setting the diameter difference between the first particle and the second particle to be greater than or equal to the first threshold, it can be ensured that the filter assembly 2 can effectively distinguish and filter particles of different diameters. This design can improve the filtering accuracy of the purification device 10 for particles, thereby effectively removing harmful substances in the air that pose a threat to the health of drivers and passengers. Setting the ratio of the diameter difference to the maximum diameter of the first particle further ensures the filtering performance of the purification device 10 for particles. Only when the diameter difference of the particles reaches a certain ratio can the system maintain good airflow while effectively filtering. This design balances the filtering effect and airflow resistance, ensuring smooth airflow without causing excessive pressure loss.

[0094] In some embodiments, Figure 1 and Figure 3 As shown, the main body 2a of the filter assembly 2 includes: a second side wall 21 and a filter structure 22. The second side wall 21 encloses a second cavity Q2, and the second side wall 21 includes a plurality of second through holes 211, and the plurality of second through holes 211 connect the first cavity Q1 and the second cavity Q2. The filter structure 22 surrounds the second side wall 21, and the filter structure 22 contacts the inner surface of the first side wall 11.

[0095] In this embodiment, Figure 1 and Figure 3 As shown, the airflow entering the purification device 10 is filtered for the first time when entering the first cavity Q1, and the airflow from the first cavity Q1 to the second cavity Q2 is filtered for the second time through the filter structure 22, so as to further filter and remove the particulate matter in the airflow. The gas filtered by the filter structure 22 passes through the plurality of second through holes 211 on the second side wall 21 and enters the second cavity Q2 surrounded by the second side wall 21, and then is discharged through the first opening K1 of the first side wall 11, so as to achieve the secondary filtration of the airflow.

[0096] like Figure 1 , Figure 2 and Figure 3 As shown, the gas entering the purification device 10 passes through the first through hole 111 of the first side wall 11 from the outside of the shell 1 and enters the first cavity Q1, and then continues to pass through the filter structure 22 to enter the second cavity Q2. In this process, the flowing airflow will impact the filter structure 22. The second side wall 21 in the filter assembly 2 can play a supporting role for the filter structure 22, ensuring that the filter structure 22 can remain in the set position and will not be displaced under the impact of the airflow, thereby ensuring the filtering effect. The design of the through hole (including the first through hole 111 and the second through hole 211) ensures that the airflow will not be subject to excessive resistance during the flow, which helps to maintain a good ventilation effect and avoid the reduction of processing efficiency due to airflow blockage.

[0097] The filter structure 22 surrounds the second side wall 21 and contacts the inner surface of the first side wall 11. This design increases the filter area of ​​the filter assembly 2. The larger the contact area between the first side wall 11 and the filter structure 22, the greater the contact area between the airflow and the filter assembly 2 at the same time, thereby enhancing the filter efficiency of the filter structure 22. At the same time, the filter structure 22 contacts the inner surface of the first side wall 11, which can effectively prevent the airflow from bypassing the filter through the gap between the first side wall 11 and the filter structure 22, ensuring that the airflow completely passes through the filter assembly 2. This design improves the stability of the purification device 10 and reduces the risk of unfiltered gas emissions.

[0098] In some embodiments, Figure 3 As shown, the filtering structure 22 is also in contact with the outer surface of the second side wall 21 .

[0099] This design ensures that the airflow does not form a dead corner in the filter assembly 2, and prevents the gas from bypassing the filter assembly 2 without being filtered. This all-round contact structural design can ensure that each part of the airflow is properly processed, thereby improving the reliability and filtering effect of the overall purification device 10.

[0100] The filter structure 22 is in contact with the inner surface of the first side wall 11 and is closely combined with the second side wall 21, which can enhance the structural stability of the entire filter assembly 2 and avoid the displacement or deformation of components under high flow rate or high pressure environment. It also optimizes the airflow path to ensure that the airflow can be more evenly distributed when passing through the filter structure 22. This helps to maintain the long-term performance of the filter assembly 2 and extend its service life.

[0101] In some embodiments, Figure 2 and Figure 3 As shown, the diameter or equivalent diameter of the second through hole 211 is greater than the diameter or equivalent diameter of the first through hole 111 .

[0102] The second through hole 211 on the second side wall 21 of the main body 2a of the filter assembly 2 is to ensure that the gas in the first cavity Q1 can flow into the second cavity Q2 continuously and stably. Under the premise of ensuring the supporting force of the second side wall 21 on the filter structure 22, the size of the second through hole 211 can be as large as possible. The larger second through hole 211 can ensure the fluidity of the airflow and prevent the processing efficiency from being reduced due to excessive airflow resistance.

[0103] This design can reduce the pressure loss of the airflow when passing through the filter assembly 2. After the airflow passes through the first cavity Q1 for preliminary filtration, the larger diameter of the second through hole 211 can smoothly guide the airflow into the next stage of processing, ensuring that the gas maintains a stable flow state during the filtration process.

[0104] In some embodiments, Figure 3 As shown, the filter structure 22 covers a plurality of second through holes 211 .

[0105] The filter structure 22 covers the multiple second through holes 211 on the second side wall 21, which can ensure that the gas entering the second cavity Q2 is filtered by the filter structure 22. In this way, the filtering effect of the filter structure 22 on the gas can be maximized, and the gas that has not been processed by the filter structure 22 can be prevented from entering the second cavity Q2 and then being directly discharged, ensuring that each part of the airflow is fully filtered.

[0106] In some embodiments, Figure 3 As shown, along the first direction X, the size of the filtering structure 22 is smaller than or equal to the size of the second side wall 21 .

[0107] The size of the filter structure 22 is less than or equal to the size of the second side wall 21, which means that the filter structure 22 can effectively accommodate and cover the entire filter area in height, thereby enhancing the ability to remove small particles. Such a design ensures that the gas is fully filtered before being discharged, improving safety. It also ensures that the filter structure 22 can be stably installed inside the purification device 10 without wasting space, improving the overall structural stability of the device, and avoiding looseness or displacement caused by inappropriate size.

[0108] In some embodiments, Figure 1 As shown, along the first direction X, the size of the main body 2a of the filter assembly 2 is smaller than or equal to the size of the first side wall 11.

[0109] The main body 2a of the filter assembly 2 is arranged in the first cavity Q1 surrounded by the first side wall 11 of the shell 1. Therefore, the size of the main body 2a along the first direction X can be the same as or smaller than the size of the first cavity Q1 along the first direction X. Regardless of the size of the main body 2a, the gas entering the first cavity Q1 can fully contact the filtering structure 22 of the filter assembly 2, thereby ensuring the filtering effect of the filter assembly 2 on the gas entering the second cavity Q2 from the first cavity Q1.

[0110] For example, Figure 1 As shown, along the first direction X, the size of the filtering structure 22 is smaller than or equal to the size of the first side wall 11 .

[0111] In combination with the above-mentioned embodiment, the purification device 10 includes a housing 1 and a filter assembly 2. The filter assembly 2 is assembled in the housing 1. The sizes of the housing 1 and the filter assembly 2 in purification devices 10 of different specifications are different.

[0112] For example, Figure 1As shown, taking the case where the shell 1 and the filter assembly 2 are both cylindrical in shape, the height of the cylinder is referred to as the height of the shell 1 and the filter assembly 2 , and the diameter of the cylinder is referred to as the width of the shell 1 and the filter assembly 2 .

[0113] In this way, when the width of the first cavity Q1 of the shell 1 matches the width of the main body 2a of the filter assembly 2, and the height of the first cavity Q1 of the shell 1 is greater than or equal to the height of the main body 2a of the filter assembly 2, the filter assembly 2 can be installed in the shell 1.

[0114] In this way, the same housing 1 can be matched and assembled with a variety of filter components 2 of different specifications, and all can ensure the filtering effect on the gas entering the purification device 10. When any one of the housing 1 and the filter component 2 in the purification device 10 needs to be replaced, more replacement options are available, and when the housing 1 and the filter component 2 in the purification device 10 are damaged unexpectedly, replacement parts can be found more quickly.

[0115] Figure 3 The partial cross-sectional view of the filter assembly 2 of some embodiments is shown to clearly show the specific structure of the filter assembly 2. Figure 3 Only a part of the filter structure 22 is shown in the figure. In fact, in the filter assembly 2, the filter structure 22 completely surrounds the second side wall 21. Figure 3 There is a gap between the first filter element 221 and the second filter element 222. In the actual filter structure 22, the first filter element 221 and the second filter element 222 may also be closely attached to each other.

[0116] In some embodiments, Figure 3 As shown, the filter structure 22 includes: a first filter element 221 surrounding the second side wall 21, the first filter element 221 is in contact with the inner surface of the first side wall 11, and covers a plurality of first through holes 111. The first filter element 221 is configured to filter the second particulate matter. The porosity of the material of the first filter element 221 is greater than or equal to 90%.

[0117] Exemplarily, the material of the first filter element 221 has a plurality of micropores, and the diameter of the micropores ranges from 0.1 μm to 1 μm.

[0118] The first filter element 221 has good air permeability and filtering ability, and can filter and adsorb small particles with an equivalent diameter greater than 0.1 microns that remain after the initial filtration by the shell 1. After the airflow passes through the first filtration of the outer shell 1 and enters the first cavity Q1, in the process of passing through the first filter element 221, some particles carried in the airflow (particles with a size greater than the micropore diameter) will be blocked by the first filter element 221 and accumulated on the outer surface of the first filter element 221 or in the first cavity Q1.

[0119] When the airflow passes through the first filter element 221, the flow rate will not be reduced due to excessive resistance, and smaller particles can be effectively intercepted to prevent them from entering the second filter element 222. The first filter element 221 covers a plurality of first through holes to ensure that the airflow does not bypass the filter material during the passage. This design ensures that all airflow is filtered and particles in the air are effectively removed.

[0120] The first filter element 221 is close to the inner surface of the first side wall 11, and does not cover the multiple first through holes 111 on the first side wall 11. In this way, it can be ensured that the first particles are filtered outside the housing 1 and will not enter the first cavity Q1, avoiding the accumulation of particles in the first cavity Q1 to affect the gas flow between the first cavity Q1 and the second cavity Q2, and ensuring that the filter assembly 2 can effectively perform secondary filtration on the gas in the first cavity Q1. By selecting suitable materials, the porosity of the material of the first filter element 221 is maintained within a certain range. While ensuring the filtering effect on the second particles, it can also ensure that the airflow can smoothly flow through the first filter element 221 into the second cavity Q2, ensuring that the gas after entering the purification device 10 still has good fluidity, and ensuring the filtering effect of the purification device 10 on the gas.

[0121] In some embodiments, Figure 3 As shown, the filter structure 22 further includes: a second filter element 222 surrounding the second side wall 21, and the second filter element 222 is located between the second side wall 21 and the first filter element 221. The second filter element 222 is configured to absorb harmful chemicals in the air and / or convert harmful chemicals in the air into harmless substances.

[0122] For example, the second filter element 222 is made of activated carbon material for absorbing harmful gases, and / or the second filter element 222 includes a porous multi-layer mesh support supported by a substrate with a certain strength such as ceramic, alumina, or metal as a substrate, and a catalyst such as zirconium oxide or manganese oxide is coated on the surface of the substrate to harmlessly transform harmful substances. Of course, the second filter element 222 can also be made of other materials or structures, which are only used as examples of some possible implementations and are not used as limitations on this application.

[0123] As a possible implementation, the second filter element 222 can absorb at least one of organic matter, nitrogen oxides and carbon monoxide in the gas, or convert at least one of organic matter, nitrogen oxides and carbon monoxide in the gas into at least one of carbon dioxide, water and nitrogen.

[0124] The second filter 222 can specially process harmful chemicals in the gas. After the airflow passes through the first filter 221, it flows to the second filter 222. Some particles carried in the airflow (particles with a size smaller than the diameter of the micropores) will be blocked by the second filter 222 and accumulated on the outer surface of the second filter 222 or between the first filter 221 and the second filter 222, and will not enter the second cavity Q2. At the same time, the second filter 222 can also absorb and catalyze harmful gases in the airflow, filter or convert harmful gases carried in the airflow into harmless substances.

[0125] The first filter element 221 and the second filter element 222 provided in the filter structure 22 form a graded filtering system to achieve a comprehensive purification effect. The first filter element 221 is specifically used to filter smaller particles, while the second filter element 222 is mainly responsible for adsorbing and converting harmful chemicals. Such a design can ensure that when processing the airflow, the particles are first physically filtered, and then the chemical pollutants in the gas are processed, thereby improving the overall purification efficiency. The gas preliminarily filtered by the shell 1 flows into the first cavity Q1, and the small particles in the airflow will be adsorbed on the outside of the first filter element 221, and the harmful gas will also be adsorbed on the inside of the second filter element 222, or catalyzed into harmless gas. The gas then flows into the second cavity Q2 to provide the first opening K1 to discharge the purification device 10, so that the gas discharged through the purification device 10 is a clean gas without carrying particles and harmful gases.

[0126] The function of the second filter 222 is to absorb and transform harmful chemicals, so that the exhaust gas is not only free of particulate matter, but also harmless to the environment. Such a design helps to protect the health of drivers and passengers, reduce the impact on the environment, and improve the overall safety of electric vehicles.

[0127] In some embodiments, Figure 3 As shown, the second filter element 222 is in contact with the outer wall of the second side wall 21 .

[0128] The second filter element 222 is in contact with the outer wall of the second side wall 21, which helps to form a good sealing effect, prevents the airflow from leaking from the gap between the filter element 222 and the second side wall 21, and ensures that all airflows can enter the second cavity Q2 only after passing through the second filter element 222, thereby ensuring that the filter structure 22 filters and removes small particles and harmful substances in the gas. In addition, the airflow can contact the filter material to the greatest extent when passing through, thereby improving the removal efficiency of particles and harmful gases. This full contact design can effectively capture and adsorb harmful chemicals in the air and ensure the safety of the discharged gas.

[0129] Exemplarily, the sum of the thicknesses of the first filter element 221 and the second filter element 222 is equal to the distance between the first side wall 11 and the second side wall 21 .

[0130] The sum of the thickness of the first filter element 221 and the second filter element 222 is equal to the distance between the first side wall 11 and the second side wall 21, ensuring that the filter assembly 2 can be perfectly embedded in the interior of the purification device 10. This precise matching not only facilitates installation, but also reduces the looseness between components and enhances the stability of the overall structure. This structural design enables the filter assembly 2 to maintain consistent performance under different working conditions, and ensures effective treatment of the gas even when the air flow speed and pressure change. The reasonable arrangement of the thickness of the filter assembly 2 enables the system to adapt to different environmental requirements in actual use.

[0131] In addition, since the thickness of the filter assembly 2 matches the first cavity Q1, the user can more conveniently replace or clean the filter assembly 2. There is no need to adjust other components, which reduces maintenance complexity and improves the usability and user experience of the purification device 10.

[0132] In some embodiments, Figure 1 and Figure 3 As shown, the shapes of the outer boundaries of the cross-sections of the second side wall 21, the first filter element 221 and the second filter element 222 include a circle, an ellipse or a polygon.

[0133] Take the main body of the purification device 10 as an example, that is, the housing 1 and the filter assembly 2 are both cylindrical structures. The first side wall 11 of the housing 1 and the second side wall 21 of the filter assembly 2 are both hollowed out to form a first through hole 111 and a second through hole 211. The second side wall 21 is used to support the filter structure 22, and the cylindrical design can provide more contact area and sufficient support strength for the covering of the filter structure 22 in a limited space.

[0134] The first filter element 221 is located outside the second filter element 222 and is in close contact with the second filter element 222. The first filter element 221 and the second filter element 222 are both cylindrical, and the cylindrical design can provide more effective use area within a certain space, that is, it can provide a more sufficient filtering area for the first filter element 221, provide more dust holding capacity, and thus provide a larger purification volume for the second filter element 222.

[0135] In some embodiments, Figure 3 As shown, along the first direction X, the size of the first filter element 221 is the same or substantially the same as the size of the second side wall 21 ; and / or, along the first direction X, the size of the second filter element 222 is the same or substantially the same as the size of the second side wall 21 .

[0136] The size of the first filter element 221 and the second filter element 222 is the same or substantially the same as the size of the second side wall 21, so that it can further ensure that the filter assembly 2 can be stably and reliably arranged in the housing 1, and the filtering area can be maximized, so that the airflow can fully contact when passing through the filter element, thereby improving the filtering effect. This design ensures that a higher proportion of particulate matter and harmful gases are effectively removed, thereby ensuring the safety of the exhaust gas. At the same time, this design eliminates the gap between the first filter element 221 and the second filter element 222, enhances the sealing, helps prevent airflow leakage, and ensures that the gas entering the second cavity Q2 is all gas filtered by the filter assembly 2. The close combination of the first filter element 221 and the second filter element 222 with the inner wall of the first side wall 11 and the outer wall of the second side wall 21 improves the stability of the overall structure and avoids displacement or deformation under high flow rate or high load conditions.

[0137] In some embodiments, Figure 4 and Figure 5 As shown, the second side wall 21 has a first end and a second end opposite to each other along the first direction X, and the filter assembly 2 further includes: a first card and a component 2b and a second card and a component 2c. The first card and the component 2b are annular, and the inner wall of the first card and the component 2b is connected to the first end of the second side wall 21. The second card and the component 2c are annular, and the inner wall of the second card and the component 2c is connected to the second end of the second side wall 21. Wherein, the filter structure 22 has a first end and a second end opposite to each other along the first direction X. Along the first direction X, the distance between the first card and the component 2b and the second card and the component 2c is greater than or equal to the size of the filter structure 22.

[0138] The first clamp and member 2b and the second clamp and member 2c are connected around the two ends of the second side wall 21, which helps to ensure the stability of the filter assembly 2 during use. This fixed design prevents the filter assembly 2 from being displaced or loosened under the impact of airflow, ensures that it always remains in a predetermined position, and improves the reliability of the overall device.

[0139] The distance between the first card and the part 2b and the second card and the part 2c is greater than or equal to the size of the filter structure 22, so that enough space is provided for the installation of the filter structure 22, so that the filter structure 22 can work flexibly under different airflow conditions. This design ensures that the filter assembly 2 can adapt to various environments and load changes, and enhances the adaptability of the system. The design of the engaging parts (the first card and the part 2b and the second card and the part 2c) ensures that the filter structure 22 is sleeved on the periphery of the second side wall 21, and limits the movement of the filter structure 22, thereby optimizing the airflow channel. When the airflow passes through the filter assembly 2, it will not cause uneven airflow distribution due to the movement of the filter structure 22, ensuring that each part of the airflow can fully contact the filter material, thereby improving the purification efficiency. The fixed design enables the filter element to effectively cover the entire filter area, reducing the leakage of unfiltered airflow. This design ensures that all incoming gases are filtered, thereby greatly improving the removal efficiency of particulate matter and harmful gases.

[0140] In some embodiments, the inner wall of the first card and piece 2 b is coplanar with the outer wall of the second side wall 21 ; and / or, the inner wall of the second card and piece 2 c is coplanar with the outer wall of the second side wall 21 .

[0141] The inner diameter of the card and component (the first card and component 2b and the second card and component 2c) is the same or approximately the same as the inner diameter of the second side wall 21. In this way, while ensuring the effective connection between the card and component and the second side wall 21, it is ensured that the gas in the second cavity Q2 will not be blocked by the card and component when flowing out of the second cavity Q2, causing airflow obstruction.

[0142] In some embodiments, Figure 3 As shown, the first end of the filter structure 22 contacts the first card and member 2b; and / or, the second end of the filter structure 22 contacts the second card and member 2c.

[0143] At least one of the two ends of the filtering structure 22 surrounding the second side wall 21 is in contact with the card and component (the first card and component 2b or the second card and component 2c). On the one hand, it can limit the position of the filtering structure 22 to prevent the filtering structure 22 from moving under the impact of the airflow and deviating from the set position, thereby ensuring the filtering effect; on the other hand, when both ends of the filtering structure 22 are in contact with the card and component, it can also ensure that the gas entering the second cavity Q2 must be filtered by the filtering structure 22, thereby ensuring the filtering effect of the filtering structure 22 on the gas.

[0144] Exemplarily, the end of the filter structure 22 in contact with the card and the component may be fixed by gluing.

[0145] In this way, the card and the component can not only limit the movement of the filter structure 22, but also play a flat sealing role, ensuring that the gas cannot enter the second cavity Q2 from the contact surface between the filter structure 22 and the card and the component, that is, the gas entering the first cavity Q1 will not enter the second cavity Q2 without passing through the filter structure 22, ensuring that the gas discharged from the second cavity Q2 is clean gas after being filtered by the filter assembly 2.

[0146] In some embodiments, the second card and piece 2c are located in the first cavity Q1 , and the outer wall of the second card and piece 2c matches the shape of the inner wall of the first side wall 11 , and the outer wall of the second card and piece 2c contacts the first side wall 11 .

[0147] With such a design, the end of the filter assembly 2 located in the first cavity Q1 can be closely attached to the first side wall 11 , thereby limiting the movement of the filter assembly 2 and fixing the filter assembly 2 .

[0148] In some embodiments, Figure 1 As shown, the purification device 10 further includes: a fixing member 3, one end of which is connected to the first end of the first side wall 11. The fixing member 3 has a second opening K2, and the second opening K2 is connected to the first opening K1 at the first end of the housing 1. The fixing member 3 includes: a first concave platform 31 arranged on the inner wall of the second opening K2, and the first clamping member 2b is located on a side of the first concave platform 31 away from the first side wall 11, and is in contact with the first concave platform 31.

[0149] The fixing member 3 is used to fix the purification device 10 at a set position. The fixing member 3 can be integrally formed with the first side wall 11 or connected and fixed to form an integral structure.

[0150] The second opening K2 on the fixing member 3 serves as the exhaust port of the purification device 10 and is connected to the first cavity Q1 surrounded by the first side wall 11, and is also connected to the second cavity Q2 of the filter assembly 2. In this way, external gas enters the first cavity Q1 through the first side wall 11, and then enters the second cavity Q2 through the filter assembly 2, and is discharged after passing through the first opening K1 and the second opening K2.

[0151] A first recess 31 is formed on the inner side wall of the second opening K2, and the first recess 31 is used to fix the filter assembly 2. The first card and component 2b of the filter assembly 2 overlap the first recess 31, and the second card and component 2c are tightly attached to the inner side wall of the first side wall 11, thereby fixing the filter assembly 2 on the shell 1.

[0152] In some embodiments, the shape of the inner wall of the first recess 31 matches the shape of the inner wall of the first side wall 11. Along the first direction X, the size of the first recess 31 is the same or substantially the same as the size of the first card and member 2b.

[0153] By matching the first recess 31 with the outer dimensions of the first card and component 2b, a flat mounting surface can be provided for the first card and component 2b. At the same time, the first card and component 2b can be fixed in the first recess 31 to limit the position of the first card and component 2b, thereby preventing the first card and component 2b from moving out of the way and causing the filter assembly 2 to move.

[0154] In some embodiments, along the first direction X, the sum of the distance between the first card and member 2 b and the second card and member 2 c and the size of the second card and member 2 c is smaller than the distance between the first recess 31 and the second end of the second side wall 21 .

[0155] The overall height (dimension along the first direction X) of the main body 2a of the filter assembly 2 is smaller than the distance between the first recess 31 and the second end of the second side wall 21 , providing sufficient space for the filter assembly 2 to be installed in the housing 1 .

[0156] For example, Figure 6 As shown, the purification device 10 further includes: a second sealing member 6, which is annular. The second sealing member 6 is disposed in the first cavity Q1 and is located between the filter structure 22 and the second end of the first side wall 11. The diameter or equivalent diameter of the outer wall of the second sealing member 6 is the same or substantially the same as the diameter or equivalent diameter of the inner wall of the first cavity Q1; and / or, the diameter or equivalent diameter of the inner wall of the second sealing member 6 is the same or substantially the same as the diameter or equivalent diameter of the inner wall of the second cavity Q2.

[0157] The overall height (dimension along the first direction X) of the main body 2a of the filter assembly 2 is smaller than the distance between the first recess 31 and the second end of the second side wall 21, which ensures the fitting installation of the filter assembly 2 in the housing 1 and leaves space for the second seal 6 subsequently arranged between the filter element and the housing 1.

[0158] The second sealing member 6 may be a sealing gasket, which may be an annular sealing gasket made of a non-metallic, compressible material. When the filter assembly 2 is installed in the housing 1, the second sealing member 6 is compressed by 50%±10%, thereby ensuring the seal between the filter assembly 2 and the second end of the housing 1, and effectively preventing the untreated airflow from flowing out.

[0159] In some embodiments, Figure 1 , Figure 6 and Figure 7 As shown, the fixing member 3 further includes: a second recessed platform 32 disposed on the inner wall of the second opening K2, the second recessed platform 32 surrounds the first recessed platform 31, and the second recessed platform 32 is further away from the first side wall 11 than the first recessed platform 31. Figure 7 As shown, the purification device 10 further includes: a first sealing member 5 disposed on a surface of the second recessed platform 32 away from the first side wall 11 , and the first sealing member 5 is annular.

[0160] For example, Figure 1 and Figure 7 As shown, the fixing member 3 further includes a plurality of connection holes surrounding the second opening K2. The connection holes are used to realize the fixed connection of the purification device 10. The connection holes can be threaded holes or smooth holes.

[0161] The first sealing member 5 may be a sealing gasket, which may be a ring-shaped sealing gasket made of a non-metallic, compressible material. When the purification device 10 is fixed on the housing 20 of the power supply system 100 (the specific connection method is described later in the description of the power supply system 100, which will not be described here), it may be compressed by 50%±10% to ensure the sealing between the filter assembly 2 and the housing 1, and between the housing 1 and the housing 20 of the power supply system 100, thereby effectively preventing untreated airflow from flowing out of the purification device 10.

[0162] Exemplarily, the outer wall of the first sealing member 5 matches the shape of the side wall of the second recessed platform 32 , and the outer wall of the first sealing member 5 contacts the side wall of the second recessed platform 32 .

[0163] Exemplarily, along the first direction X, the absolute value of the difference between the sum of the distance between the first card and piece 2b and the second card and piece 2c and the size of the second card and piece 2c and the distance between the first recess 31 and the second end of the second side wall 21 is greater than or equal to 2 mm.

[0164] In some embodiments, Figure 8 and Fig. 9 As shown, the purification device 10 further includes: a pressure relief component 4, which is disposed on one side of the first side wall 11 along the first direction X and connected to the second end of the first side wall 11. The pressure relief component 4 is configured to open and release pressure when the air pressure in the first cavity Q1 is greater than or equal to a set threshold, so that the air pressure in the first cavity Q1 is maintained within a set range.

[0165] By setting up the pressure relief component 4, the air flow discharged from the second cavity Q2 can be smaller than the air flow entering the first cavity Q1 from the outside. That is, when the purification device 10 cannot provide sufficient ventilation, the pressure in the purification device 10 increases. When the pressure increases to a set threshold, the pressure relief component 4 opens to relieve the pressure, so that the air pressure in the first cavity Q1 is maintained within a set range, thereby ensuring the safety of the purification device 10.

[0166] In some embodiments, Figure 8As shown, the pressure relief assembly 4 includes: a first connecting member 41 and a pressure-resistant member 42. The first connecting member 41 is annular, and includes a first end and a second end opposite to each other along the first direction X, and the first end of the first connecting member 41 is connected to the second end of the first side wall 11. The pressure-resistant member 42 is connected to the second end of the first connecting member 41. The pressure-resistant value of the pressure-resistant member 42 is greater than or equal to 4 kPa, and less than or equal to 6 kPa.

[0167] The pressure-resistant member 42 includes but is not limited to a pressure-resistant film, and the material of the pressure-resistant film has high temperature and high humidity resistance.

[0168] The thickness of the pressure-resistant membrane of the same material is proportional to the pressure resistance value. The greater the thickness of the pressure-resistant membrane, the greater the pressure resistance value; and the pressure resistance values ​​of pressure-resistant membranes of different materials at the same thickness may also be different. By selecting pressure-resistant membranes of different thicknesses and / or different materials, the pressure-resistant membrane can have different pressure resistance values, so that when the internal air pressure of the purification device 10 is greater than or equal to the set threshold, the pressure-resistant membrane ruptures, so that the gas can flow out of the purification device 10 in large quantities to achieve a pressure relief effect. The thickness of the pressure-resistant membrane can be adaptively designed according to actual needs.

[0169] In some embodiments, Figure 8 As shown, the pressure relief assembly 4 further includes: a second connecting member 43, the second connecting member 43 is in the form of a ring, the second connecting member 43 is connected to the second end of the first connecting member 41, and the outer wall of the second connecting member 43 is coplanar with the outer wall of the first connecting member 41. The inner wall of the second connecting member 43 matches the shape of the inner wall of the first connecting member 41, and the diameter or equivalent diameter of the inner wall of the second connecting member 43 is smaller than the diameter or equivalent diameter of the inner wall of the first connecting member 41.

[0170] Among them, the pressure-resistant part 42 is arranged on the side of the second connecting part 43 away from the first connecting part 41, and is connected to the second connecting part 43; or, the pressure-resistant part 42 is arranged in the first connecting part 41; the surface of the pressure-resistant part 42 away from the first side wall 11 is connected to the second connecting part 43, and the outer wall of the pressure-resistant part 42 is in contact with the inner wall of the second connecting part 43.

[0171] The second connecting member 43 is provided to provide sufficient pasting space for the pressure-resistant member 42. The pressure-resistant member 42 may be provided with adhesive on its surface, and is bonded to the second connecting member 43 through the adhesive, and the bonding part can ensure that it will not loosen or be airtight during the service life of the vehicle.

[0172] In some embodiments, Fig.10 and Fig.11As shown, the housing 1 further includes: a third connecting member 12, which is annular and connected to the second end of the first side wall 11. The first connecting member 41 surrounds the third connecting member 12 and is connected to the third connecting member 12. The pressure-resistant member 42 is located at an end of the second connecting member 43 away from the third connecting member 12; or, the pressure-resistant member 42 is located between the second connecting member 43 and the third connecting member 12, and the pressure-resistant member 42 contacts the second connecting member 43 and the third connecting member 12 on opposite sides along the first direction X.

[0173] The third connecting member 12 and the first connecting member 41 can be threadedly connected, so that when the pressure-resistant member 42 is damaged and needs to be replaced, the pressure relief assembly 4 can be replaced quickly and conveniently.

[0174] In some embodiments, the purification device 10 further includes: a third seal 7, which is annular. The third seal 7 is disposed in the first connecting member 41 and is located between the pressure-resistant member 42 and the second end of the first side wall 11. The third seal 7 surrounds the first connecting member 41 and contacts the second end of the first side wall 11. The outer wall of the third seal 7 matches the shape of the inner wall of the first connecting member 41, and the outer wall of the third seal 7 contacts the inner wall of the first connecting member 41. The inner wall of the third seal 7 matches the shape of the outer wall of the third connecting member 12, and the inner wall of the third seal 7 contacts the outer wall of the third connecting member 12; or, the third seal 7 is disposed between the second connecting member 43 and the third connecting member 12, and contacts the third connecting member 12.

[0175] When the third sealing member 7 is arranged between the second connecting member 43 and the third connecting member 12, the end of the third sealing member 7 away from the shell 1 can be in contact with the pressure-resistant membrane, or in contact with the second connecting member 43 fixing the pressure-resistant membrane, or in contact with both the second connecting member 43 and the pressure-resistant membrane.

[0176] The third sealing member 7 may be a sealing gasket, which may be a non-metallic, compressible annular sealing gasket. When the pressure relief assembly 4 is tightened and assembled with the housing 1, the third sealing member 7 is compressed by 50%±10%, thereby ensuring the seal between the pressure relief assembly 4 and the housing 1 and effectively preventing untreated airflow from flowing out.

[0177] Some embodiments of the present application also provide a vehicle.

[0178] In some embodiments, a vehicle includes: a vehicle body and a power supply system 100, and the power supply system 100 is disposed in the vehicle body.

[0179] like Fig.12As shown, the power supply system 100 includes: a box 20, a battery and a purification device 10. The battery and the purification device 10 are both arranged in the box 20. The box 20 includes an exhaust port 201, and the exhaust end of the purification device 10 is connected to the exhaust port 201 of the box 20, and the exhaust end of the purification device 10 is connected to the first cavity Q1 of the shell 1 of the purification device 10.

[0180] Taking the ternary lithium battery as an example, when the ternary lithium battery has thermal runaway, it will bring the danger of high temperature and instantaneous high voltage, and will also produce a large amount of particulate matter and gas, among which the main components of the gas include CO, H2, CO2, C2H4, CH4. Among them, CO is the gas component with the highest content. In addition, the erupted particulate matter accounts for about 20% to 30% of the mass of the battery cell. These emissions have brought considerable risks to the environment and the health of drivers and passengers.

[0181] In this embodiment, a purification device 10 is provided at the exhaust port 201 inside the box body 20, and the purification device 10 is sealed and connected to the inner wall of the box body 20. The airflow generated after the battery in the box body 20 has thermal runaway needs to be filtered by the purification device 10 before being discharged outside the box body 20. The CO generated by the thermal runaway of the battery is converted into CO2 after passing through the filter component 2 of the purification device 10, and C2H4 and CH4 are converted into water and CO2. The gas discharged from the box body 20 does not carry harmful gases, thereby ensuring the personal safety of the driver and passengers; the H2 generated by the thermal runaway of the battery is converted into water in the purification device 10, thereby avoiding the gas discharged from the box body 20 carrying flammable and explosive substances, which may cause hidden dangers to the vehicle safety; the nitrogen oxides and other combustion-supporting substances generated by the thermal runaway of the battery can also be converted into water and nitrogen in the purification device 10, thereby effectively avoiding the gas discharged from the box body 20 carrying combustion-supporting substances, which may cause hidden dangers to the vehicle safety.

[0182] The purification device 10 can intercept and adsorb particulate matter in the airflow, and can adsorb or catalyze harmful gases in the airflow, so that the gas discharged outside the box 20 after thermal runaway is particulate-free, non-toxic and harmless. At the same time, the purification device 10 is arranged on the inner side of the exhaust port 201 of the box 20, and will not make major changes to the original internal space of the box 20, and will not add any components to the outside of the box 20. While achieving the purification and filtering effect on the gas discharged from the box 20, the volume of the power supply system 100 will not be increased. Moreover, when the amount of gas generated by thermal runaway of the battery is large and the amount of gas discharged by the purification device 10 through the first opening K1 is less than the amount of gas generated by thermal runaway of the battery, the purified airflow discharged by the purification device 10 through the first opening K1 cannot provide sufficient gas discharge volume. At this time, the pressure inside the box 20 and the purification device 10 will gradually increase. Before the air pressure reaches the upper limit of the pressure inside the purification device 10, the pressure-resistant part 42 of the pressure relief assembly 4 of the purification device 10 will rupture to form an airflow passage, thereby ensuring timely and rapid pressure relief and preventing explosion due to excessive internal pressure.

[0183] Through the design of the above structure, the primary filtration of the housing 1 of the purification device 10 and the secondary filtration of the filter assembly 2 are combined to form a graded filtration system, which ensures efficient and high-quality removal of particulate matter in the airflow. In addition, the well-designed opening and through-hole structure ensures smooth airflow and avoids possible blockage problems, thereby improving the safety and effectiveness of the entire system. This graded treatment mechanism not only solves the problem of environmental pollution after battery thermal runaway, but also protects the health of drivers and passengers, and meets the increasingly stringent requirements of the electric vehicle market for safety performance.

[0184] In some embodiments, a first end of the first side wall 11 of the shell 1 of the purification device 10 is connected to a fixing member 3, the fixing member 3 is connected to the box body 20, and the first opening K1 of the first side wall 11 is connected to the exhaust port 201 of the box body 20; or, the power supply system 100 also includes: an air duct 40 arranged in the box body 20, and the exhaust end of the air duct 40 is connected to the exhaust port 201 of the box body 20; the purification device 10 is located in the air duct 40, and the first opening K1 of the first side wall 11 is connected to the exhaust port 201 of the box body 20.

[0185] The installation position of the purification device 10 is flexible, and it can be directly installed at the exhaust port 201 of the box body 20 , or it can be installed inside the air passage 40 of the box body 20 .

[0186] In some embodiments, the power supply system 100 further includes: an exhaust valve 50 , which is disposed outside the box body 20 and connected to the exhaust port 201 .

[0187] By providing the exhaust valve 50 , when the air pressure in the box body 20 is greater than a set threshold, the exhaust valve 50 opens to release the pressure, thereby preventing the box body 20 from bursting due to excessive air pressure in the box body 20 .

[0188] In some embodiments, the housing 20 includes a plurality of exhaust ports 201 and a plurality of purification devices 10 , one purification device 10 is correspondingly connected to one exhaust port 201 , and the number of purification devices 10 is less than or equal to the number of exhaust ports 201 .

[0189] The number of the purification devices 10 may be consistent with the number of the exhaust ports 201 of the housing 20, so that the gas in the housing 20 is discharged after passing through the purification devices 10, ensuring that the discharged gas is clean gas without particles and harmful substances after purification and filtration. It can be understood that when the number of the purification devices 10 is less than the number of the exhaust ports 201 of the housing 20, the purification and filtration of the gas discharged from the housing 20 can still be achieved.

Claims

1. A power supply system (100), characterized in that: include: The housing (20) includes an exhaust port (201); A battery (30) is disposed in the box (20); At least one purification device (10) is arranged in the housing (20); the exhaust end of the purification device (10) is connected to the exhaust port (201) of the housing (20); the exhaust end of the purification device (10) is communicated with the first cavity (Q1) of the shell (1) of the purification device (10).

2. The power supply system (100) according to claim 1, characterized in that: A first end of a first side wall (11) of a housing (1) of the purification device (10) is connected to a fixing member (3), the fixing member (3) is connected to the housing (20), and a first opening (K1) of the first side wall (11) is in communication with an exhaust port (201) of the housing (20); or, The power supply system (100) further comprises: an air duct (40) disposed in the box (20); an exhaust end of the air duct (40) being in communication with an exhaust port (201) of the box (20); the purification device (10) being located in the air duct (40), and a first opening (K1) of the first side wall (11) being in communication with the exhaust port (201) of the box (20).

3. The power supply system (100) according to claim 1, characterized in that: The power supply system (100) further comprises: An exhaust valve (50) is arranged outside the box body (20) and is connected to the exhaust port (201).

4. The power supply system (100) according to any one of claims 1 to 3, characterized in that: The housing (20) comprises a plurality of exhaust ports (201) and a plurality of purification devices (10), one purification device (10) being correspondingly connected to one exhaust port (201), and the number of the purification devices (10) being less than or equal to the number of the exhaust ports (201).

5. The power supply system (100) according to claim 1, characterized in that: The purification device (10) comprises: A shell (1) comprises a first side wall (11), the first side wall (11) enclosing a first cavity (Q1), the first side wall (11) having a first end and a second end opposite to each other along a first direction (X), the first end of the first side wall (11) having a first opening (K1), the first opening (K1) connecting the first cavity (Q1) with the outside of the shell (1); the first side wall (11) further comprises a plurality of first through holes (111), the plurality of first through holes (111) connecting the first cavity (Q1) with the outside of the shell (1); the first side wall (11) is configured to filter first particulate matter; A filter assembly (2); a main body (2a) of the filter assembly (2) is arranged in the first cavity (Q1); the main body (2a) comprises a second cavity (Q2), the second cavity (Q2) is connected to the first cavity (Q1), and the second cavity (Q2) is connected to the outside of the housing (1) through the first opening (K1); the filter assembly (2) is configured to filter second particulate matter; Wherein, the minimum value of the diameter of the first particle is greater than the maximum value of the diameter of the second particle.

6. The power supply system (100) according to claim 5, characterized in that: The main body (2a) of the filter assembly (2) comprises: a second side wall (21), the second side wall (21) enclosing the second cavity (Q2); the second side wall (21) comprising a plurality of second through holes (211), the plurality of second through holes (211) connecting the first cavity (Q1) and the second cavity (Q2); A filtering structure (22) surrounds the second side wall (21); the filtering structure (22) is in contact with the inner surface of the first side wall (11).

7. The power supply system (100) according to claim 6, characterized in that: The filtering structure (22) is also in contact with the outer surface of the second side wall (21).

8. The power supply system (100) according to claim 6, characterized in that: The diameter or equivalent diameter of the second through hole (211) is greater than the diameter or equivalent diameter of the first through hole (111).

9. The power supply system (100) according to claim 6, characterized in that: Along the first direction (X), the size of the filtering structure (22) is smaller than or equal to the size of the second side wall (21); The filtering structure (22) covers the plurality of second through holes (211).

10. The power supply system (100) according to any one of claims 6 to 9, characterized in that: Along the first direction (X), the size of the filtering structure (22) is smaller than or equal to the size of the first side wall (11).

11. The power supply system (100) according to claim 6, characterized in that: The filtering structure (22) comprises: A first filter element (221) surrounds the second side wall (21); the first filter element (221) contacts the inner surface of the first side wall (11) and covers the plurality of first through holes (111); the porosity of the material of the first filter element (221) is greater than or equal to 90%; and the first filter element (221) is configured to filter the second particulate matter.

12. The power supply system (100) according to claim 11, characterized in that: The filtering structure (22) comprises: The second filter element (222) surrounds the second side wall (21) and is located between the second side wall (21) and the first filter element (221); the second filter element (222) is configured to adsorb harmful chemicals in the air and / or convert harmful chemicals in the air into harmless substances.

13. The power supply system (100) according to claim 12, characterized in that: The second filter element (222) is in contact with the outer wall of the second side wall (21).

14. The power supply system (100) according to claim 12, characterized in that: The sum of the thicknesses of the first filter element (221) and the second filter element (222) is equal to the distance between the first side wall (11) and the second side wall (21).

15. The power supply system (100) according to claim 12, characterized in that: The shapes of the outer boundaries of the cross-sections of the second side wall (21), the first filter element (221) and the second filter element (222) include a circle, an ellipse or a polygon.

16. The power supply system (100) according to claim 12, characterized in that: Along the first direction (X), the size of the first filter element (221) is the same or substantially the same as the size of the second side wall (21); and / or, Along the first direction (X), the size of the second filter element (222) is the same as or substantially the same as the size of the second side wall (21).

17. The power supply system (100) according to claim 6, characterized in that: The second side wall (21) has a first end and a second end opposite to each other along the first direction (X), and the filter assembly (2) further comprises: The first clamp and piece (2b) is annular; the inner wall of the first clamp and piece (2b) is connected to the first end of the second side wall (21); A second clip and piece (2c) is annular; an inner wall of the second clip and piece (2c) is connected to the second end of the second side wall (21); The filtering structure (22) has a first end and a second end opposite to each other along the first direction (X); along the first direction (X), the distance between the first card and component (2b) and the second card and component (2c) is greater than or equal to the size of the filtering structure (22).

18. The power supply system (100) according to claim 17, characterized in that: The inner wall of the first card and piece (2b) is coplanar with the outer wall of the second side wall (21); and / or the inner wall of the second card and piece (2c) is coplanar with the outer wall of the second side wall (21).

19. The power supply system (100) according to claim 17, characterized in that: The first end of the filtering structure (22) is in contact with the first card and member (2b); and / or, The second end of the filtering structure (22) contacts the second card and member (2c).

20. The power supply system (100) according to any one of claims 17 to 19, characterized in that: The second card and piece (2c) are located in the first cavity (Q1), the outer wall of the second card and piece (2c) matches the shape of the inner wall of the first side wall (11), and the outer wall of the second card and piece (2c) contacts the first side wall (11).

21. The power supply system (100) according to any one of claims 17 to 19, characterized in that: The purification device (10) further comprises: a fixing member (3), one end of the fixing member (3) being connected to the first end of the first side wall (11); the fixing member (3) having a second opening (K2), the second opening (K2) being in communication with the first opening (K1) at the first end of the housing (1); Wherein, the fixing member (3) comprises: a first recessed platform (31) arranged on the inner wall of the second opening (K2); the first clamping member (2b) is located on a side of the first recessed platform (31) away from the first side wall (11) and is in contact with the first recessed platform (31).

22. The power supply system (100) according to claim 21, characterized in that: The shape of the inner wall of the first recessed platform (31) matches the shape of the inner wall of the first side wall (11); Along the first direction (X), the size of the first recess (31) is the same or substantially the same as the size of the first clamp (2b).

23. The power supply system (100) according to claim 21, characterized in that: Along the first direction (X), the sum of the distance between the first card and piece (2b) and the second card and piece (2c) and the size of the second card and piece (2c) is smaller than the distance between the first recess (31) and the second end of the second side wall (21).

24. The power supply system (100) according to claim 23, characterized in that: Along the first direction (X), the absolute value of the difference between the sum of the distance between the first card and part (2b) and the second card and part (2c) and the size of the second card and part (2c), and the distance between the first recess (31) and the second end of the second side wall (21) is greater than or equal to 2 mm.

25. The power supply system (100) according to claim 5, characterized in that: The purification device (10) further comprises: a pressure relief assembly (4), which is arranged on one side of the first side wall (11) along the first direction (X) and is connected to the second end of the first side wall (11); The pressure relief component (4) is configured to open and relieve pressure when the air pressure in the first cavity (Q1) is greater than or equal to a set threshold, so that the air pressure in the first cavity (Q1) is maintained within a set range.

26. The power supply system (100) according to claim 25, characterized in that: The pressure relief component (4) comprises: A first connecting member (41) is annular and comprises a first end and a second end opposite to each other along the first direction (X); the first end of the first connecting member (41) is connected to the second end of the first side wall (11); A pressure-resistant part (42) is connected to the second end of the first connecting part (41); the pressure-resistant value of the pressure-resistant part (42) is greater than or equal to 4 kPa and less than or equal to 6 kPa.

27. The power supply system (100) according to claim 26, characterized in that: The pressure relief component (4) further comprises: The second connecting member (43) is annular in shape; the second connecting member (43) is connected to the second end of the first connecting member (41), and the outer wall of the second connecting member (43) is coplanar with the outer wall of the first connecting member (41); the inner wall of the second connecting member (43) matches the shape of the inner wall of the first connecting member (41), and the diameter or equivalent diameter of the inner wall of the second connecting member (43) is smaller than the diameter or equivalent diameter of the inner wall of the first connecting member (41); Wherein, the pressure-resistant member (42) is arranged on a side of the second connecting member (43) away from the first connecting member (41), and is connected to the second connecting member (43); or, The pressure-resistant part (42) is arranged in the first connecting part (41); the surface of the pressure-resistant part (42) away from the first side wall (11) is connected to the second connecting part (43), and the outer wall of the pressure-resistant part (42) is in contact with the inner wall of the second connecting part (43).

28. The power supply system (100) according to claim 26 or 27, characterized in that: The housing (1) further comprises: The third connecting member (12) is annular and connected to the second end of the first side wall (11); the first connecting member (41) surrounds the third connecting member (12) and is connected to the third connecting member (12); The pressure-resistant member (42) is located at an end of the second connecting member (43) away from the third connecting member (12); or, The pressure-resistant member (42) is located between the second connecting member (43) and the third connecting member (12), and the pressure-resistant member (42) is in contact with the second connecting member (43) and the third connecting member (12) at two opposite sides along the first direction (X).

29. The power supply system (100) according to claim 21, characterized in that: The fixing member (3) further comprises: A second concave platform (32) is arranged on the inner wall of the second opening (K2) and surrounds the first concave platform (31); the second concave platform (32) is farther away from the first side wall (11) than the first concave platform (31); The purification device (10) further comprises: The first sealing member (5) is annular and is arranged on a surface of the second recessed platform (32) away from the first side wall (11).

30. The power supply system (100) according to claim 29, characterized in that: The outer wall of the first sealing member (5) matches the shape of the side wall of the second recessed platform (32), and the outer wall of the first sealing member (5) contacts the side wall of the second recessed platform (32).

31. The power supply system (100) according to claim 5, characterized in that: The purification device (10) further comprises: A second sealing member (6) is annular and is disposed in the first cavity (Q1) and is located between the filtering structure (22) and the second end of the first side wall (11); The diameter or equivalent diameter of the outer wall of the second sealing member (6) is the same or substantially the same as the diameter or equivalent diameter of the inner wall of the first cavity (Q1); and / or, The diameter or equivalent diameter of the inner wall of the second sealing member (6) is the same or substantially the same as the diameter or equivalent diameter of the inner wall of the second cavity (Q2).

32. The power supply system (100) according to claim 28, characterized in that: The purification device (10) further comprises: A third sealing member (7) is annular and is disposed in the first connecting member (41) and is located between the pressure-resistant member (42) and the second end of the first side wall (11); The third sealing member (7) surrounds the first connecting member (41) and contacts the second end of the first side wall (11); the outer wall of the third sealing member (7) matches the shape of the inner wall of the first connecting member (41), and the outer wall of the third sealing member (7) contacts the inner wall of the first connecting member (41); the inner wall of the third sealing member (7) matches the shape of the outer wall of the third connecting member (12), and the inner wall of the third sealing member (7) contacts the outer wall of the third connecting member (12); or, The third sealing member (7) is arranged between the second connecting member (43) and the third connecting member (12), and is in contact with the third connecting member (12).

33. A vehicle, characterized in that: include: Vehicle body; The power supply system (100) according to any one of claims 29 to 32 is arranged in the vehicle body.

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