Exhaust assembly and exhaust device

Abstract

The exhaust assembly comprises a supporting shell and a one-way valve, the one-way valve is arranged at one end of the supporting shell and communicated with an inner cavity of the supporting shell, an opening is formed in at least one end, different from the end where the one-way valve is arranged, of the supporting shell, and the opening is communicated with the inner cavity of the supporting shell. The supporting shell is used for being supported in an air bag formed by a packaging film of the battery, and the one-way valve is arranged in a film hole of the packaging film and connected with the packaging film. The exhaust assembly is supported in the air bag formed by the packaging film of the battery through the supporting shell so as to ensure that the interior of the packaging film is kept in a negative pressure state for a long time after the battery is sealed, all gas generated in the formation process can move into the air bag from a roll core, meanwhile, the supporting shell is provided with a one-way valve installed in a film hole of the packaging film, and the air bag is not prone to being blocked. The one-way valve is communicated with the air bag through the inner cavity of the supporting shell and the opening and can be opened and closed under the action of air pressure so that air in the air bag can be exhausted.

Description

TECHNICAL FIELD

[0001] The utility model relates to the battery production field, concretely relates to a exhaust assembly and exhaust device. BACKGROUND

[0002] The soft package battery first needs to be wrapped in the aluminum plastic film in the production process, and the air bag is formed in the aluminum plastic film and arranged side by side with the winding core, then the aluminum plastic film is top sealed and side sealed, then the liquid is injected into the aluminum plastic film and sealed, after the injection and the first sealing, the formation is carried out, the gas generated in the formation process is contained by the air bag, after the formation is finished, the air bag is punctured and the gas in the air bag is extracted, then the aluminum plastic film is sealed for the second time to separate the winding core and the air bag, finally the part of the aluminum plastic film forming the air bag is cut off.

[0003] However, in the actual production process, the aluminum plastic film will be deformed in the process of injection and first sealing, and the air bag may be squeezed, and the gas generated in the formation process is difficult to push the aluminum plastic film and completely enter the air bag, and when the air bag is sucked by negative pressure, the air bag is quickly deflated under the action of negative pressure, which also hinders the gas near the winding core, resulting in that part of the gas remains near the winding core and cannot be completely extracted. SUMMARY

[0004] The utility model aims at at least one of the technical problems in the related art to some extent. To this end, the embodiment of the utility model provides an exhaust assembly, which can support the air bag formed by the packaging film and exhaust the gas in the air bag.

[0005] The embodiment of the utility model also provides an exhaust device.

[0006] The exhaust assembly of the embodiment of the utility model comprises a support shell and a check valve, the check valve is arranged at one end of the support shell and communicates with the inner cavity of the support shell, at least one end of the support shell, different from the end where the check valve is arranged, is provided with an opening, the opening communicates with the inner cavity of the support shell, the support shell is used for supporting in the air bag formed by the packaging film of the battery, and the check valve is used for being arranged in the film hole of the packaging film and being connected with the packaging film.

[0007] The exhaust assembly of the embodiment of the utility model supports in the air bag formed by the packaging film of the battery through the support shell, so as to ensure that the packaging film in the battery keeps a negative pressure state for a long time after the first sealing, and all the gas generated in the formation process can be moved from the winding core to the air bag, at the same time, the support shell is provided with the check valve installed in the film hole of the packaging film, the check valve communicates with the air bag through the inner cavity and the opening of the support shell, and can be opened and closed under the action of air pressure to exhaust the gas in the air bag. In addition, when the gas in the air bag is sucked by the negative pressure equipment, since the support shell also supports the check valve, the negative pressure equipment and the check valve can be quickly connected, and the efficiency is improved.

[0008] In some embodiments, the one-way valve comprises a fixed valve plate connected to the support shell and an elastic valve plate, a peripheral end of the elastic valve plate is connected to the fixed valve plate, and the elastic valve plate is located at an end of the fixed valve plate away from the support shell, the fixed valve plate is provided with a first exhaust port, the elastic valve plate is provided with a second exhaust port, the elastic valve plate can be attached to an end surface of the fixed valve plate to close the first exhaust port and the second exhaust port, and the elastic valve plate can also be elastically deformed under the action of air pressure to make the first exhaust port and the second exhaust port communicate.

[0009] In some embodiments, the second exhaust port is a plurality of second exhaust ports, and the plurality of second exhaust ports are arranged at intervals around the first exhaust port.

[0010] In some embodiments, the fixed valve plate comprises a flat portion and a recessed portion, the flat portion is an annular portion provided at the periphery of the recessed portion, the flat portion is connected to the support shell and used for connecting the packaging film, and the recessed portion is provided with the first exhaust port, and a peripheral end of the elastic valve plate is connected to an inner peripheral end of the flat portion or an outer peripheral end of the recessed portion and located in a recessed space formed by the recessed portion.

[0011] In some embodiments, the recessed portion comprises a bevel portion and an arc portion, the bevel portion is an annular portion provided at the periphery of the arc portion, the maximum included angle between the tangent of the arc portion and the flat portion is smaller than the included angle between the bevel portion and the flat portion, and the peripheral end of the elastic valve plate is connected to the bevel portion.

[0012] In some embodiments, the support shell comprises a support portion and an indication portion, the support portion is provided with the one-way valve at one end in a first direction, and the indication portion is provided at one end of the support portion in a second direction to indicate the orientation of the support shell, and the second direction is orthogonal to the first direction.

[0013] In some embodiments, a projection of the support portion in a projection plane orthogonal to a third direction is a rectangle, a projection of the indication portion in the projection plane orthogonal to the third direction is a triangle or a trapezoid, corresponding openings are arranged on end surfaces of the support portion and the indication portion in the third direction, another end of the support portion in the first direction is provided with a corresponding opening, and the third direction is orthogonal to the second direction and the first direction.

[0014] The exhaust device provided in the embodiments of the present application comprises:

[0015] The exhaust assembly is the exhaust assembly described in any of the above embodiments.

[0016] A docking assembly detachably and sealingly connected with the exhaust assembly, the docking assembly being provided with an interface, the interface being in communication with the one-way valve when the docking assembly is connected with the exhaust assembly;

[0017] A negative pressure device connected with the docking assembly.

[0018] The exhaust device of the embodiment of the present application adopts the exhaust assembly of the embodiment of the present application, so that all the gas generated in the formation process can be moved from the winding core to the gas bag and further discharged from the gas bag. Meanwhile, the exhaust device of the embodiment of the present application is further provided with the docking assembly connected with the negative pressure device, the docking assembly can be quickly and conveniently docked and separated from the exhaust assembly, and cooperates with the supporting effect of the supporting shell to ensure the sealing between the docking assembly and the exhaust assembly, so that the negative pressure provided by the negative pressure device can act on the one-way valve and the gas bag.

[0019] In some embodiments, the docking assembly comprises:

[0020] A pressing plate, at least a part of the pressing plate being used to abut against the supporting shell, the pressing plate being provided with a negative pressure channel, the negative pressure channel being in communication with the negative pressure device;

[0021] A sealing ring, the sealing ring being arranged on the pressing plate, the sealing ring surrounding the interface, the interface being in communication with the negative pressure channel, and the sealing ring being used to abut against the one-way valve.

[0022] In some embodiments, the outer peripheral end of the one-way valve is arranged on the end surface of the supporting shell and is used to abut against the sealing ring;

[0023] An end surface of the pressing plate is provided with a mounting groove and a avoiding groove, the mounting groove being in communication with the negative pressure channel, the sealing ring being arranged in the mounting groove, one end of the sealing ring used to abut against the outer peripheral end of the one-way valve extending out of a slot opening of the mounting groove, the avoiding groove being an annular surrounding the outer periphery of the mounting groove and being in communication with the mounting groove, and an inner peripheral surface of the avoiding groove surrounding the outer periphery of the one-way valve when the sealing ring abuts against the outer peripheral end of the one-way valve. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic view of the exhaust assembly of the embodiment of the present application;

[0025] Figure 2 is an installation schematic view of the exhaust assembly of the embodiment of the present application;

[0026] Figure 3 is Figure 1 a sectional view of the one-way valve in the middle;

[0027] Figure 4is a sectional view of part structure of the exhaust device of the embodiment of the present application.

[0028] Reference signs:

[0029] 1, support shell, 11, opening, 12, support part, 13, indication part, 2, one-way valve, 21, fixed valve plate, 211, flat part, 212, recessed part, 2121, inclined surface part, 2122, arc surface part, 22, elastic valve plate, 23, first exhaust port, 24, second exhaust port, 3, butt joint assembly, 31, interface, 32, pressing plate, 321, negative pressure channel, 322, mounting groove, 323, avoiding groove, 33, sealing ring, 10, packaging film, 20, roll core. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0031] The embodiments of the present application are described below with reference to the drawings. Figures 1-4 The exhaust assembly and the exhaust device according to the embodiments of the present application are described below.

[0032] As shown in Figures 1-4 , the exhaust assembly of the embodiment of the present application comprises a support shell 1 and a one-way valve 2.

[0033] The one-way valve 2 is arranged at one end of the support shell 1 and communicates with the inner cavity of the support shell 1. The support shell 1 is provided with an opening 11 at least at one end other than the end where the one-way valve 2 is arranged, and the opening 11 communicates with the inner cavity of the support shell 1. The support shell 1 is used to support in the air bag formed by the packaging film 10 of the battery, and the one-way valve 2 is arranged in the film hole of the packaging film 10 and connected with the packaging film 10.

[0034] Specifically, as shown in Figure 1 and Figure 2 , the support shell 1 is a hollow shell, the top end of the support shell 1 is provided with the one-way valve 2, the one-way valve 2 communicates with the inner cavity of the support shell 1, and the support shell 1 is provided with the opening 11 at least at one end of the other end except the top end, and the opening 11 communicates with the inner cavity of the support shell 1.

[0035] The exhaust assembly of the embodiment of the present application is used for exhaust during the formation process of battery production. When the packaging film 10 wraps the roll core 20 and forms an air bag, the support shell 1 is arranged in the air bag formed by the packaging film 10, the part of the packaging film 10 forming the air bag is provided with a film hole, the film hole communicates with the air bag and is preferably located at the top of the air bag, the one-way valve 2 is arranged in the film hole and connected with the packaging film 10, preferably, the packaging film 10 is an aluminum plastic film, the aluminum plastic film is connected with the one-way valve 2 by heat melting, so as to seal between the packaging film 10 and the one-way valve 2, and the film hole is punched and formed.

[0036] Then the packaging film 10 is top-sealed and side-sealed, liquid is injected into the packaging film 10, and one sealing is performed, and after the one sealing is completed, formation is performed, at this time, since the support shell 1 is supported in the air bag, all the gas generated in the formation can smoothly enter the air bag, and further flow through the opening 11 and the inner cavity of the support shell 1, and then be discharged through the one-way valve 2.

[0037] After the formation and the gas discharge are completed, the packaging film 10 is two-sealed, and the part of the packaging film 10 forming the air bag is cut off, and then the gas discharge assembly is detached from the cut-off part of the packaging film 10, and after being cleaned, the detached gas discharge assembly can be reused.

[0038] The height dimension of the support shell 1 in the up-down direction can be the same as or smaller than the height dimension of the air bag, and the support shell 1 being supported in the air bag means that when the air bag is stressed or deformed under the action of air pressure, the support shell 1 can play a role in supporting the air bag, and is not limited to the top end and the bottom end of the support shell 1 needing to be always in abutment with the inner wall surface of the air bag, since the one-way valve 2 provided at the top end of the support shell 1 is connected to the packaging film 10, the bottom end of the support shell 1 can be suspended in the air bag when the air bag is not deformed, in other words, the bottom end of the support shell 1 is spaced from the inner wall surface of the air bag, at this time, the bottom end of the support shell 1 can also be provided with the opening 11.

[0039] Preferably, the left end, the right end and the bottom end of the support shell 1 are each provided with the opening 11.

[0040] The openings 11 at the same end of the support shell 1 can be provided as one or multiple, and the shape of the opening 11 can be circular, rectangular, strip-shaped or irregular, etc. Preferably, the left end and the right end of the support shell 1 are each provided with multiple strip-shaped openings 11 extending in the up-down direction, the multiple strip-shaped openings 11 at the same end are arranged in the front-rear direction with spacing, and the bottom of the support shell 1 is provided with a circular opening 11, and the circular opening 11 is arranged opposite to the one-way valve 2.

[0041] The gas discharge assembly of the embodiment of the utility model is supported in the air bag formed by the packaging film of the battery by the support shell, so as to ensure that the packaging film maintains a negative pressure state for a long time after the battery is sealed, and all the gas generated in the formation process can be moved from the winding core to the air bag, at the same time, the support shell is provided with the one-way valve installed in the film hole of the packaging film, the one-way valve is communicated with the air bag through the inner cavity and the opening of the support shell, and can be opened and closed under the action of air pressure, so as to discharge the gas in the air bag. In addition, when the negative pressure equipment is used to suck the gas in the air bag, since the support shell also plays a supporting role on the one-way valve, the negative pressure equipment and the one-way valve can be quickly connected, and the efficiency is improved.

[0042] It should be noted that the gas inside the air bag is not only discharged under the negative pressure provided by the negative pressure equipment; the one-way valve can also open under the pressure of the gas inside the air bag to automatically discharge the gas. The one-way valve can discharge the gas inside the air bag in a timely manner to prevent the air bag from expanding due to excessive gas. At the same time, because the gas can be discharged in a timely manner, the volume of the air bag can be reduced, thus reducing the amount of packaging film and other materials used.

[0043] In some embodiments, the one-way valve 2 includes a fixed valve plate 21 and an elastic valve plate 22. The fixed valve plate 21 is connected to the support shell 1. The outer peripheral end of the elastic valve plate 22 is connected to the fixed valve plate 21, and the elastic valve plate 22 is located at the end of the fixed valve plate 21 away from the support shell 1. The fixed valve plate 21 is provided with a first exhaust port 23, and the elastic valve plate 22 is provided with a second exhaust port 24. The elastic valve plate 22 can fit against the end face of the fixed valve plate 21 to close the first exhaust port 23 and the second exhaust port 24. The elastic valve plate 22 can also undergo elastic deformation under air pressure to make the first exhaust port 23 and the second exhaust port 24 communicate.

[0044] like Figures 1-3 As shown, the one-way valve 2 includes a fixed valve plate 21 and an elastic valve plate 22. Both the fixed valve plate 21 and the elastic valve plate 22 are horizontally arranged. The fixed valve plate 21 is connected to the support shell 1 and is located at the top of the support shell 1. The fixed valve plate 21 is provided with a first exhaust port 23 that communicates with the inner cavity of the support shell 1. Preferably, the first exhaust port 23 penetrates the fixed valve plate 21 in the vertical direction.

[0045] The elastic valve plate 22 is disposed on the top of the fixed valve plate 21, and the outer peripheral end of the elastic valve plate 22 is connected to the fixed valve plate 21, preferably by welding, more preferably by laser welding. The elastic valve plate 22 is provided with a second exhaust port 24, which preferably penetrates the elastic valve plate 22 in a vertical direction.

[0046] The elastic valve plate 22 is capable of elastic deformation, allowing it to move between a closed position and an open position. In the closed position, the bottom surface of the elastic valve plate 22 is abutted against the top surface of the fixed valve plate 21. The first exhaust port 23 and the second exhaust port 24 are staggered horizontally, thus the first exhaust port 23 is closed by the elastic valve plate 22, and the second exhaust port 24 is closed by the fixed valve plate 21, isolating the first and second exhaust ports 23 and 24, and the one-way valve 2 is in the closed state. In the open position, a gap is formed between the bottom surface of the elastic valve plate 22 and the top surface of the fixed valve plate 21, and both the first and second exhaust ports 23 and 24 are open, communicating through the gap, and the one-way valve 2 is in the open state.

[0047] The elastic deformation of the elastic valve plate 22 is caused by the air pressure. In a normal pressure environment, the elastic valve plate 22 is in the closed position. The air pressure that moves the elastic valve plate 22 to the open position can come from the air bag. When the air in the air bag reaches a certain volume and pressure, the part of the elastic valve plate 22 corresponding to the first exhaust port 23 is subjected to the pressure of the air in the air bag, causing the elastic valve plate 22 to move to the open position. After a portion of the air is exhausted, the pressure of the air in the air bag decreases, and the elastic valve plate 22 moves back to the closed position. The air pressure that moves the elastic valve plate 22 to the open position can also come from a negative pressure device connected to the one-way valve 2 and providing negative pressure. The elastic valve plate 22 is moved from the closed position to the open position under the negative pressure of the negative pressure device and can remain in the open position under the negative pressure. When the negative pressure device is turned off, the elastic valve plate 22 moves from the open position back to the closed position. Therefore, when the one-way valve 2 is driven to open and close by the negative pressure device, the position of the elastic valve plate 22 can be controlled by the negative pressure, and the air in the air bag can be completely exhausted by maintaining the elastic valve plate 22 in the open position. At the same time, the negative pressure also acts on the air bag through the open one-way valve 2, thereby sucking the air in the air bag to ensure that the air in the air bag is completely exhausted.

[0048] Preferably, the one-way valve 2 is detachably connected to the negative pressure device to control the opening and closing of the one-way valve 2 by the negative pressure device.

[0049] In some embodiments, the second exhaust port 24 is a plurality of second exhaust ports 24 arranged at intervals around the first exhaust port 23.

[0050] As Figures 1-3 described above, the first exhaust port 23 is arranged at the center of the fixed valve plate 21, and the first exhaust port 23 can be rectangular, circular, annular, etc., and is preferably circular. The second exhaust port 24 is a plurality of second exhaust ports 24 arranged at intervals around the first exhaust port 23, in other words, the plurality of second exhaust ports 24 are arranged at intervals along the circumference of the first exhaust port 23. The second exhaust port 24 can be rectangular, circular, arc-shaped, sector-shaped, triangular, etc., and is preferably sector-shaped.

[0051] In some embodiments, the fixed valve plate 21 includes a flat portion 211 and a recessed portion 212. The flat portion 211 is an annular portion arranged at the outer periphery of the recessed portion 212, and is connected to the support shell 1 and used to connect the packaging film 10. The recessed portion 212 is provided with the first exhaust port 23. The outer peripheral end of the elastic valve plate 22 is connected to the inner peripheral end of the flat portion 211 or the outer peripheral end of the recessed portion 212 and located in the recessed space formed by the recessed portion 212.

[0052] As Figure 3As shown, the fixed valve plate 21 comprises a flat portion 211 and a concave portion 212, the concave portion 212 is circular, and the first exhaust port 23 is arranged at the center of the concave portion 212. The flat portion 211 is a circular ring arranged at the outer periphery of the concave portion 212, and the flat portion 211 is arranged horizontally, and the concave portion 212 is concave downward from the flat portion 211 and forms a concave space.

[0053] The flat portion 211 is connected with the support shell 1 and is used for connecting the packaging film 10. Preferably, the flat portion 211 is carried on the top surface of the support shell 1 and is welded to be connected. The aluminum plastic film of the packaging film 10 is connected to the top surface of the flat portion 211 by heat melting, so as to ensure the sealing between the support shell 1, the flat portion 211 and the packaging film 10, and facilitate the assembly of the support shell 1, the one-way valve 2 and the packaging film 10.

[0054] The elastic valve plate 22 is located in the concave space formed by the concave portion 212, and the outer peripheral end of the elastic valve plate 22 is welded to be connected with the inner peripheral end of the flat portion 211, preferably laser welded to be connected, or the outer peripheral end of the elastic valve plate 22 is welded to be connected with the outer peripheral end of the concave portion 212, preferably laser welded to be connected. Preferably, in the closed position, the elastic valve plate 22 is flush with the flat portion 211.

[0055] In some embodiments, the concave portion 212 comprises a bevel portion 2121 and an arc portion 2122, the bevel portion 2121 is an annular ring arranged at the outer periphery of the arc portion 2122, the maximum included angle between the tangent line of the arc portion 2122 and the flat portion 211 is smaller than the included angle between the bevel portion 2121 and the flat portion 211, and the outer peripheral end of the elastic valve plate 22 is connected with the bevel portion 2121.

[0056] As shown in the drawings, Figure 3 The concave portion 212 comprises a bevel portion 2121 and an arc portion 2122, the arc portion 2122 is an arc surface concave downward, the first exhaust port is arranged at the center of the arc portion 2122, the bevel portion 2121 is an annular ring arranged at the outer periphery of the arc portion 2122, and the bevel portion 2121 is connected between the inner peripheral end of the flat portion 211 and the outer peripheral end of the arc portion 2122, the bevel portion 2121 extends in the direction from top to bottom and is arranged obliquely from the inner peripheral end of the flat portion 211 to the outer peripheral end of the arc portion 2122, the maximum included angle between the tangent line of the arc portion 2122 and the flat portion 211 is smaller than the included angle between the bevel portion 2121 and the flat portion 211, and the outer peripheral end of the elastic valve plate 22 is welded to be connected with the bevel portion 2121, preferably laser welded to be connected. Preferably, the elastic valve plate 22 in the closed position is arranged concentrically with the arc portion 2122.

[0057] In some embodiments, the support shell 1 comprises a support portion 12 and an indication portion 13, the support portion 12 is arranged along the first direction (such as the direction of the arrow A in the drawings), Figure 1A one-way valve 2 is provided at one end of the support part 12 in the up-down direction (as shown), and an indicator part 13 is provided at the support part 12 along the second direction (such as...). Figure 1 One end (shown in the front-back direction) is used to indicate the orientation of the support shell 1, and the second direction is orthogonal to the first direction.

[0058] like Figure 1 and Figure 2 As shown, the support shell 1 includes a support part 12 and an indicator part 13. The top of the support part 12 is provided with a one-way valve 2. Specifically, the straight part 211 of the fixed valve plate 21 is supported on the top surface of the support part 12 and welded to the top surface of the support part 12. The front end of the support part 12 is connected to the indicator part 13. The shape of the indicator part 13 is different from that of the support part 12. When the exhaust assembly is connected and installed with the packaging film 10, the position of the support shell 1 can be determined by the position of the indicator part 13 relative to the support part 12, thereby determining the installation position of the one-way valve 2, so as to ensure that the one-way valve 2 is at the top of the air bag.

[0059] The inner cavity and opening of the support shell 1 can be provided in both the support part 12 and the indicator part 13, or they can be provided only in the support part 12.

[0060] In some embodiments, the support portion 12 is orthogonal to a third direction (e.g., Figure 1 The projection of the indicator part 13 in the projection plane (shown in the left and right directions) is a rectangle, and the projection of the indicator part 13 in the projection plane orthogonal to the third direction is a triangle or trapezoid. The end faces of the support part 12 and the indicator part 13 along the third direction are provided with corresponding openings 11. The other end of the support part 12 along the first direction is provided with a corresponding opening 11. The third direction is orthogonal to the second direction and the first direction.

[0061] like Figure 1 As shown, in a vertical projection plane orthogonal to the left and right directions, the projection of the support part 12 is a rectangle, and the projection of the indicator part 13 is a triangle or trapezoid, preferably a trapezoid. The end of the indicator part 13 corresponding to the lower base of the trapezoid is connected to the front end of the support part 12. The support part 12 and the indicator part 13 extend in the left and right directions and have constant shapes and sizes.

[0062] The inner cavity of the support shell 1 is located in both the support part 12 and the indicator part 13. Both the support part 12 and the indicator part 13 have multiple openings 11 at their left and right ends. The openings 11 at the left and right ends are strips extending in the vertical direction. Multiple openings 11 at the same end are arranged at intervals in the front and back direction. The bottom of the support part 12 has a circular opening 11, which is opposite to the one-way valve 2.

[0063] Furthermore, the rear end of the support part 12 may also be provided with multiple strip openings 11, and the multiple strip openings 11 at the rear end are arranged at intervals in the left and right direction.

[0064] It can be understood that the opening 11 is not limited to be strip-shaped and circular, and in other embodiments, the opening 11 can also be rectangular, triangular, mesh-shaped, etc.

[0065] As shown in Figures 1-4 The exhaust device of the embodiment of the utility model includes exhaust assembly, butt joint assembly 3 and negative pressure equipment (not shown in the drawing).

[0066] The exhaust assembly is the exhaust assembly of the embodiment of the utility model. The butt joint assembly 3 is detachably and sealingly connected with the exhaust assembly, and the butt joint assembly 3 is provided with an interface 31, which is in communication with the one-way valve 2 when the butt joint assembly 3 is connected with the exhaust assembly. The negative pressure equipment is connected with the butt joint assembly 3.

[0067] As shown in Figure 2 And Figure 4 As shown in the drawing, after the winding core 20, the exhaust assembly and the packaging film 10 are assembled, and the liquid injection and the first sealing are performed, the butt joint assembly 3 is sealingly connected with the exhaust assembly, and the interface 31 of the butt joint assembly 3 is in communication with the one-way valve 2.

[0068] The butt joint assembly 3 can be directly arranged on the negative pressure equipment or connected with the negative pressure equipment through a pipeline. The negative pressure equipment can act the negative pressure on the one-way valve 2 through the butt joint assembly 3 to open the one-way valve 2, and then further act the negative pressure in the air bag to completely suck and discharge the gas.

[0069] After the formation and the exhaust are completed, the butt joint assembly 3 is separated from the exhaust assembly, preferably separated from the packaging film 10, thereby indirectly separated from the exhaust assembly. The one-way valve 2 is automatically closed, and then the second sealing is performed on the packaging film 10, and the part of the packaging film 10 forming the air bag is cut off. The exhaust assembly is detached from the cut-off part of the packaging film 10.

[0070] The exhaust device of the embodiment of the utility model adopts the exhaust assembly of the embodiment of the utility model, so that all the gas generated in the formation process can be moved from the winding core to the air bag and further discharged from the air bag. Meanwhile, the exhaust device of the embodiment of the utility model is also provided with the butt joint assembly connected with the negative pressure equipment. The butt joint assembly can be quickly and conveniently butted and separated with the exhaust assembly, and cooperates with the supporting effect of the supporting shell to ensure the sealing between the butt joint assembly and the exhaust assembly, so that the negative pressure provided by the negative pressure equipment can act on the one-way valve and the air bag.

[0071] In some embodiments, the docking assembly 3 includes a pressure plate 32 and a sealing ring 33. At least a portion of the pressure plate 32 abuts against the support shell 1. The pressure plate 32 is provided with a negative pressure channel 321, which communicates with a negative pressure device. The sealing ring 33 is disposed on the pressure plate 32 and surrounds to form an interface 31, which communicates with the negative pressure channel 321. The sealing ring 33 abuts against the one-way valve 2.

[0072] like Figure 4 As shown, the docking assembly 3 includes a pressure plate 32 and a sealing ring 33. The pressure plate 32 is horizontally positioned and the sealing ring 33 is embedded therein. The sealing ring 33 is annular in the vertical direction and surrounds to form an interface 31. A negative pressure channel 321 is provided inside the pressure plate 32. One end of the negative pressure channel 321 is connected to the interface 31, and the other end of the negative pressure channel 321 is connected to a negative pressure device through a pipeline, so that the negative pressure provided by the negative pressure device can act on the interface 31 through the pipeline and the negative pressure channel 321. The sealing ring 33 is preferably made of rubber.

[0073] When the docking assembly 3 and the exhaust assembly are indirectly sealed and connected through the packaging film 10, the bottom surface of the pressure plate 32 indirectly abuts against the top of the support shell 1 through the packaging film 10. Of course, the pressure plate 32 is not limited to abutting against the top of the support shell 1 completely. The pressure plate 32 can also extend to the part of the packaging film 10 beyond the top of the support shell 1. It can even indirectly abut against the top of the core 20 through the packaging film 10. The bottom surface of the sealing ring 33 directly or indirectly abuts against the one-way valve 2 through the packaging film 10. The interface 31 is set opposite to the one-way valve 2 to achieve a sealed connection between the one-way valve 2 and the interface 31. When the negative pressure provided by the negative pressure device is provided to the interface 31, the one-way valve 2 and the sealing ring 33 maintain a stable sealed connection under the action of negative pressure.

[0074] In some implementations, the outer peripheral end of the check valve 2 is located on the end face of the support shell 1 and is used to abut against the sealing ring 33. The end face of the pressure plate 32 is provided with a mounting groove 322 and a clearance groove 323. The mounting groove 322 is connected to the negative pressure channel 321. The sealing ring 33 is located in the mounting groove 322. One end of the sealing ring 33 that abuts against the outer peripheral end of the check valve 2 extends out of the groove opening of the mounting groove 322. The clearance groove 323 is annular around the outer periphery of the mounting groove 322 and is connected to the mounting groove 322. When the sealing ring 33 abuts against the outer peripheral end of the check valve 2, the inner peripheral surface of the clearance groove 323 surrounds the outer periphery of the check valve 2.

[0075] like Figure 4As shown, the bottom surface of the pressing plate 32 is provided with a mounting groove 322 and an avoiding groove 323, the mounting groove 322 is circular, the avoiding groove 323 is a circular ring provided at the outer periphery of the mounting groove 322, and the avoiding groove 323 is communicated with the mounting groove 322, the connecting position between the groove bottom surface of the avoiding groove 323 and the inner periphery surface of the mounting groove 322 forms the notch of the mounting groove 322, the depth of the mounting groove 322 is greater than that of the avoiding groove 323, and the center of the groove bottom of the mounting groove 322 is communicated with the negative pressure channel 321.

[0076] The sealing ring 33 is embedded in the mounting groove 322, the sealing ring 33 is communicated with the negative pressure channel 321 around the formed interface 31, the bottom end of the sealing ring 33 is stretched out from the notch of the mounting groove 322, preferably, the bottom surface of the sealing ring 33 is higher than the bottom surface of the pressing plate 32, in other words, the bottom surface of the sealing ring 33 is located between the bottom surface of the pressing plate 32 and the groove bottom surface of the avoiding groove 323.

[0077] The flat part 211 of the fixed valve plate 21 is arranged on the top surface of the support shell 1, when the butt joint assembly 3 is sealingly connected with the exhaust assembly, the one-way valve 2 is located in the space surrounded by the avoiding groove 323, the bottom surface of the sealing ring 33 directly or indirectly abuts on the flat part 211 through the packaging film 10, the bottom part of the sealing ring 33 is compressed and deformed and partially stretches into the avoiding groove 323.

[0078] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0079] In addition, the terms "first" and "second" are only used for distinction, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0080] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication or two element mutual action relation, unless another definite limitation.For ordinary skilled person in the art, can understand the concrete meaning of above terms in the utility model according to specific circumstances.

[0081] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature, can be first and second features direct contact, or first and second features indirectly contact through intermediate medium.And, first feature "over", "above" and "on" second feature, can be first feature directly above or obliquely above second feature, or just indicate that the horizontal height of first feature is higher than second feature.First feature "under", "below" and "under" second feature, can be first feature directly below or obliquely below second feature, or just indicate that the horizontal height of first feature is less than second feature.

[0082] In the utility model, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.And, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0083] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and the changes, modifications, replacements and variations of the above embodiments made by the ordinary skilled in the art are within the protection scope of the utility model.

Claims

1. An exhaust assembly characterized by, The application relates to a support shell (1) and a one-way valve (2), the one-way valve (2) being arranged at one end of the support shell (1) and being in communication with the inner cavity of the support shell (1), the support shell (1) being provided with an opening (11) at least at the end where the one-way valve (2) is arranged, the opening (11) being in communication with the inner cavity of the support shell (1), the support shell (1) being used for supporting a gas bag formed by a packaging film (10) of a battery, and the one-way valve (2) being arranged at a film hole of the packaging film (10) and being connected with the packaging film (10). The one-way valve (2) comprises a fixed valve plate (21) and an elastic valve plate (22), the fixed valve plate (21) being connected with the support shell (1), the outer peripheral end of the elastic valve plate (22) being connected with the fixed valve plate (21), and the elastic valve plate (22) being arranged at the end of the fixed valve plate (21) which is away from the support shell (1), the fixed valve plate (21) being provided with a first exhaust port (23), the elastic valve plate (22) being provided with a second exhaust port (24), the elastic valve plate (22) being capable of being attached to the end surface of the fixed valve plate (21) to close the first exhaust port (23) and the second exhaust port (24), and the elastic valve plate (22) being capable of being elastically deformed under the action of gas pressure to make the first exhaust port (23) and the second exhaust port (24) communicate.

2. The exhaust assembly of claim 1, wherein, The second exhaust port (24) is a plurality of second exhaust ports (24) which are arranged at intervals around the first exhaust port (23).

3. The exhaust assembly of claim 2, wherein, The fixed valve plate (21) comprises a flat portion (211) and a recessed portion (212), the flat portion (211) being an annular ring arranged at the outer periphery of the recessed portion (212), the flat portion (211) being connected with the support shell (1) and being used for connecting the packaging film (10), and the recessed portion (212) being provided with the first exhaust port (23), the outer peripheral end of the elastic valve plate (22) being connected with the inner peripheral end of the flat portion (211) or the outer peripheral end of the recessed portion (212) and being arranged in the recessed space formed by the recessed portion (212).

4. The exhaust assembly of claim 2, wherein, The recessed portion (212) comprises a bevel portion (2121) and an arc portion (2122), the bevel portion (2121) being an annular ring arranged at the outer periphery of the arc portion (2122), the maximum included angle between the tangent of the arc portion (2122) and the flat portion (211) being smaller than the included angle between the bevel portion (2121) and the flat portion (211), and the outer peripheral end of the elastic valve plate (22) being connected with the bevel portion (2121).

5. The exhaust assembly of claim 4, wherein, The support shell (1) comprises a support portion (12) and an indicating portion (13), the support portion (12) being provided with the one-way valve (2) at one end in a first direction, the indicating portion (13) being arranged at one end of the support portion (12) in a second direction to indicate the orientation of the support shell (1), and the second direction being orthogonal to the first direction.

6. The exhaust assembly of claim 1, wherein, ​ 7. The exhaust assembly of claim 6, wherein, The projection of the support part (12) in a projection plane orthogonal to the third direction is rectangular, the projection of the indication part (13) in a projection plane orthogonal to the third direction is triangular or trapezoidal, the end surface of the support part (12) and the indication part (13) along the third direction is provided with a corresponding opening (11), the other end of the support part (12) along the first direction is provided with a corresponding opening (11), and the third direction is orthogonal to the second direction and the first direction.

8. An exhaust device characterized by Comprise: An exhaust assembly according to any one of claims 1-7; A docking assembly (3) detachably and sealingly connected with the exhaust assembly, the docking assembly (3) being provided with an interface (31) in communication with the one-way valve (2) when the docking assembly (3) is connected with the exhaust assembly; A negative pressure device connected with the docking assembly (3).

9. The exhaust apparatus according to claim 8, characterized by The docking assembly (3) comprises: A pressing plate (32), at least a part of the pressing plate (32) being used to abut against the support shell (1), the pressing plate (32) being provided with a negative pressure channel (321) in communication with the negative pressure device; A sealing ring (33) provided on the pressing plate (32), the sealing ring (33) surrounding the interface (31), the interface (31) being in communication with the negative pressure channel (321), and the sealing ring (33) being used to abut against the one-way valve (2).

10. The exhaust apparatus according to claim 9, characterized by The outer circumferential end of the one-way valve (2) is arranged on the end surface of the support shell (1) and is used to abut against the sealing ring (33); The end surface of the pressing plate (32) is provided with a mounting groove (322) and a relief groove (323), the mounting groove (322) being in communication with the negative pressure channel (321), the sealing ring (33) being arranged in the mounting groove (322), one end of the outer circumferential end of the one-way valve (2) abutting against the sealing ring (33) extending out of the slot opening of the mounting groove (322), and the relief groove (323) being annularly arranged on the outer periphery of the mounting groove (322) and being in communication with the mounting groove (322), the inner circumferential surface of the relief groove (323) surrounding the outer periphery of the one-way valve (2) when the sealing ring (33) abuts against the outer circumferential end of the one-way valve (2).

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