Valve opening assembly, valve opening assembly and drying equipment

Abstract

The embodiment of the utility model provides a valve opening assembly, a valve opening assembly and drying equipment, and belongs to the technical field of batteries, and the valve opening assembly comprises a mounting part, a pressure applying main body and an air bag. One end of the mounting piece is provided with a first limiting part. The pressing main body is movably arranged on the mounting piece. The air bag is located between the pressure applying body and the first limiting part and can be inflated and deflated repeatedly. As the air bag is located between the pressure applying main body and the first limiting part, when the air bag is inflated, the air bag expands to extrude the pressure applying main body, and the pressure applying main body can move towards the normally-closed valves of the battery monomers, so that the pressure applying main body can apply pressure to the normally-closed valves of the battery monomers to open the normally-closed valves of the battery monomers. The air bag is kept in an inflated state, and the expanded air bag continuously extrudes the pressure applying main body, so that the pressure applying main body can continuously apply pressure to the normally-closed valves of the battery monomers so as to keep the normally-closed valves of the battery monomers in an open state, and heating and drying of the space in the shell of the battery monomers are facilitated.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a valve opening assembly, a valve opening assembly, and a drying device. Background Art

[0002] New energy batteries are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with batteries are already widely used. In addition, batteries are being used more and more in the field of energy storage.

[0003] Before injecting electrolyte into a single battery cell, the normally closed valve of the cell needs to be opened to dry the space inside the cell's casing. However, in related technologies, it is difficult to open the normally closed valve of the battery cell during the drying process. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a valve opening assembly, a valve opening system, and a drying device, which enables the normally closed valve of a battery cell to be opened during the drying process of the battery cell.

[0005] This application is achieved through the following technical solution.

[0006] A first aspect of this application provides a valve opening assembly, including:

[0007] The mounting component has a first limiting portion at one end;

[0008] The pressure-applying body is movably disposed on the mounting component;

[0009] An airbag is located between the pressure-applying body and the first limiting part, and the airbag can be repeatedly inflated and deflated.

[0010] In this embodiment, since the airbag is located between the pressure-applying body and the first limiting part, when the airbag is inflated, the inflated airbag compresses the pressure-applying body, allowing the pressure-applying body to move towards the normally closed valve of the battery cell. This allows the pressure-applying body to apply pressure to the normally closed valve of the battery cell to open it. Keeping the airbag in an inflated state, the inflated airbag continuously compresses the pressure-applying body, allowing the pressure-applying body to continuously apply pressure to the normally closed valve of the battery cell to keep the normally closed valve open, which is beneficial for heating and drying the space inside the battery cell's casing.

[0011] In one embodiment, the airbag is ring-shaped and is fitted onto the mounting component.

[0012] In this embodiment, the annular airbag fitted onto the mounting component allows the airbag to apply a more uniform pressure to the pressure-applying body around the mounting component, which facilitates smoother movement of the pressure-applying body on the mounting component.

[0013] In one embodiment, the airbag is circular in shape.

[0014] In this embodiment, the circular airbag is fitted onto the mounting component, making the force exerted by the airbag on the pressure-applying body around the mounting component more uniform, which is beneficial for the pressure-applying body to move more smoothly on the mounting component.

[0015] In one embodiment, the mounting component includes:

[0016] A guide shaft, on which the pressure-applying body is movably sleeved;

[0017] The first limiting block is connected to one end of the guide shaft, and the first limiting part is formed in the first limiting block.

[0018] In this embodiment, by sleeved on the guide shaft, the pressure-applying body can be better guided to move along the axial direction of the guide shaft, which is beneficial to accurately guide the pressure-applying body to apply pressure to the normally closed valve to open the normally closed valve.

[0019] In one embodiment, the mounting component further includes a second limiting block connected to one end of the guide shaft opposite to the first limiting block, the pressure applying body being located between the first limiting block and the second limiting block along the axial direction of the guide shaft, and the pressure applying body being movable to abut against the second limiting block.

[0020] In this embodiment, the pressure-applying body is located between the first limiting block and the second limiting block along the axial direction of the guide shaft. The pressure-applying body can move to abut against the second limiting block. On the one hand, the first limiting block and the second limiting block can prevent the pressure-applying body from detaching from the guide shaft along the axial direction of the guide shaft. On the other hand, the first limiting block and the second limiting block can constrain the extreme position of the pressure-applying body's movement along the axial direction of the guide shaft, reducing the possibility that the pressure-applying body may move too close to the normally closed switch and damage the normally closed switch of the battery cell.

[0021] In one embodiment, the valve opening assembly further includes an elastic element located between the pressure-applying body and the second limiting block.

[0022] In this embodiment, during the process of the airbag inflating and compressing the pressure-applying body to apply pressure to the normally closed valve, the elastic element located between the pressure-applying body and the second limiting block can play a certain buffering role, reducing the impact of the pressure-applying body on the normally closed valve of the battery cell during airbag inflating. Furthermore, during airbag depressurization, the elastic force of the elastic element can push the pressure-applying body away from the normally closed valve to reset. This facilitates rapid airbag depressurization and, more importantly, pushes the pressure-applying body away from the normally closed valve of the battery cell during airbag depressurization, which helps reduce damage to the normally closed valve of the battery cell.

[0023] In one embodiment, the elastic element is sleeved on the guide shaft.

[0024] In this embodiment, the elastic element is sleeved on the guide shaft, so that the guide shaft can constrain the position of the elastic element in the radial direction of the guide shaft, thereby reducing the possibility of the elastic element coming out of the pressure body and the second limiting block in the radial direction of the guide shaft.

[0025] In one embodiment, the pressure-applying body includes:

[0026] A support member is movably disposed on the mounting member, and the airbag is located between the support member and the first limiting part;

[0027] A flexible component is connected to the support component, and the flexible component is located on the side of the support component opposite to the airbag.

[0028] In this embodiment, the support member can better support the flexible member to apply force to the normally closed valve of the battery cell. The flexible member contacts the normally closed valve of the battery cell to apply force to open the normally closed valve. Since there is flexible contact between the flexible member and the battery cell, it is beneficial to reduce damage to the normally closed valve of the battery cell.

[0029] In one embodiment, the flexible member has a plurality of spaced-apart first ventilation grooves and a plurality of spaced-apart second ventilation grooves, the plurality of first ventilation grooves and the plurality of second ventilation grooves being arranged in a cross pattern, and the first ventilation grooves and the second ventilation grooves being located on the side of the flexible member away from the airbag.

[0030] In this embodiment, when the normally closed valve of the battery cell is open, the space inside the battery cell's casing is connected to the external space of the battery cell's casing through the normally closed valve, the first vent groove, and the second vent groove.

[0031] A second aspect of this application provides a valve opening assembly, including:

[0032] Base;

[0033] In any of the above valve opening assemblies, the mounting component is connected to the base;

[0034] A container, located below the corresponding pressure-applying body, is mounted on the base and is used to carry individual battery cells.

[0035] In this embodiment, the base provides support for the mounting component, allowing the inflated airbag supported by the mounting component to exert a force on the pressure-applying body, thereby causing the pressure-applying body to exert a force on the normally closed valve of the battery cell to open the normally closed valve.

[0036] A third aspect of this application provides a drying apparatus, comprising:

[0037] Heating furnace;

[0038] The inflation device is located inside the heating furnace;

[0039] In any of the above valve opening assemblies, the heating furnace is used to dry the battery cells carried by the valve opening assembly located inside the heating furnace, and the inflation device is used to inflate the airbag.

[0040] In this embodiment, the space inside the casing of a battery cell with its normally closed valve open is dried using a heating furnace.

[0041] Utility model effect:

[0042] In this embodiment of the valve opening assembly, since the airbag is located between the pressure-applying body and the first limiting part, when the airbag is inflated, the inflated airbag compresses the pressure-applying body, allowing the pressure-applying body to move towards the normally closed valve of the battery cell. This allows the pressure-applying body to apply pressure to the normally closed valve of the battery cell to open it. Keeping the airbag in an inflated state, the inflated airbag continuously compresses the pressure-applying body, allowing the pressure-applying body to continuously apply pressure to the normally closed valve of the battery cell, keeping the normally closed valve of the battery cell in an open state. This facilitates heating and drying the space inside the battery cell's casing. Attached Figure Description

[0043] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0044] Figure 1 This is a schematic diagram showing the contact between the pressure-applying body of the pressure valve assembly in an embodiment of this application and the normally closed valve of the battery cell inside the container.

[0045] Figure 2 for Figure 1 View A in the middle;

[0046] Figure 3 This is a schematic diagram of the valve opening assembly according to an embodiment of this application;

[0047] Figure 4 for Figure 3 View B in the middle;

[0048] Figure 5 This is a schematic diagram of the structure of the pressure-applying body according to an embodiment of this application;

[0049] Figure 6 for Figure 5 A sectional view at position CC in the middle;

[0050] Figure 7 This is a schematic diagram of the pipeline connection between the airbag, switching valve and inflation device in an embodiment of this application.

[0051] Description of Reference Numerals

[0052] 100. Valve opening assembly; 1. Mounting component; 11. First limiting part; 12. Guide shaft; 13. First limiting block; 14. Second limiting block; 2. Pressurizing body; 21. Support component; 22. Flexible component; 221. First venting groove; 222. Second venting groove; 3. Airbag; 4. Elastic component; 200. Container; 300. Inflation device; 400. Battery cell; 500. Switching valve; 600. Pressure relief pipeline. Detailed Implementation

[0053] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having” and any variations thereof in the embodiments of this application are intended to cover non-exclusive inclusion.

[0055] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0056] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0057] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0058] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0059] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0060] In related technologies, the bare cells of a battery cell are enclosed in a relatively sealed space by a casing. The casing has a normally closed valve, which, when opened, connects the internal and external spaces of the battery cell casing, facilitating the drying of the internal space. However, before injecting electrolyte into the battery cell, it needs to be dried in a heating furnace. During heating in the furnace, it is difficult to keep the normally closed valve open, thus hindering the drying of the internal space of the battery cell casing.

[0061] In this embodiment, the airbag is inflated and squeezed to apply pressure to the normally closed valve of the battery cell, thereby opening the normally closed valve and keeping it open, thus effectively drying the space inside the battery cell's casing.

[0062] The number of battery cells can be multiple, and these cells can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells are connected in both series and parallel configurations. Multiple battery cells can be directly connected in series, parallel, or a combination thereof to form a battery pack. Alternatively, multiple battery cells can first be connected in series, parallel, or a combination thereof to form battery modules, and then these battery modules can be connected in series, parallel, or a combination thereof to form a battery pack. The battery pack may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells.

[0063] A battery cell is a basic unit that can convert chemical energy into electrical energy.

[0064] In the embodiments of this application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0065] In the embodiments of this application, the battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0066] Bare cells can be formed by winding or stacking electrode sheets.

[0067] The electrode includes a current collector and an active material disposed on at least one side surface of the current collector.

[0068] The current collector has a sheet-like structure and can be rolled up.

[0069] The current collector can be a metal foil or a composite current collector.

[0070] For example, the metal foil can be made of stainless steel, copper, aluminum, nickel, or titanium.

[0071] For example, the composite material is a combination of a metallic material and a polymer matrix.

[0072] This application provides a drying device, which includes a heating furnace and a valve opening assembly. The heating furnace is used to dry the battery cells 400 carried by the valve opening assembly located inside the heating furnace.

[0073] In this embodiment of the application, heat is released by a heating furnace to heat and dry the space inside the battery cell 400.

[0074] In one embodiment, the drying equipment further includes an air filling device 300 located inside a heating furnace.

[0075] In this embodiment of the application, the structure inside the heating furnace that needs to be inflated can be inflated by the inflation device 300 inside the heating furnace.

[0076] For the valve opening assembly of this application embodiment, please refer to [link / reference]. Figure 1 and Figure 2 The valve opening assembly includes a base, a valve opening component 100, and a container 200. The valve opening component 100 is disposed on the base. The container 200 is mounted on the base and is used to carry the battery cell 400. The normally closed valve of the battery cell 400 carried in the container 200 is opened by the valve opening component 100.

[0077] The normally closed valve is located on the casing of the battery cell 400. The normally closed valve is closed when no external force is applied, but it can be opened under external force.

[0078] For example, the base can be moved into or out of the heating furnace. The valve assembly can be moved entirely into or out of the heating furnace via the base.

[0079] In this embodiment, the mounting component 1 is connected to the base, and the container 200 is mounted on the base. The base supports the mounting component 1 and the container 200, so that the mounting component 1 can provide a supporting reaction force for the airbag 3, thereby causing the airbag 3 to press the pressure body 2 against the normally closed valve of the battery cell 400.

[0080] For the valve opening assembly 100 of this application embodiment, please refer to [link / reference]. Figures 1-4 The valve opening assembly 100 includes a mounting component 1, a pressure applying body 2, and an airbag 3. One end of the mounting component 1 has a first limiting part 11. The pressure applying body 2 is movably disposed on the mounting component 1. The airbag 3 is located between the pressure applying body 2 and the first limiting part 11, and the airbag 3 can be repeatedly inflated and deflated.

[0081] For example, please refer to Figures 3-6 The main body 2 applying pressure is plate-shaped.

[0082] For example, the inflation device 300 is used to inflate the airbag 3. The airbag 3 can be inflated by the inflation device 300 inside the heating furnace.

[0083] For example, the mounting component 1 is connected to the base, and the container 200 is located below the corresponding pressure-applying body 2.

[0084] Please see Figure 1 and Figure 3 In the diagram, arrow R1 indicates the up-down direction.

[0085] Understandably, there are multiple ways to depressurize the airbag 3.

[0086] For example, the valve opening assembly 100 includes a pressure relief valve installed on the airbag 3, which can be used to deflate the airbag 3.

[0087] For example, the drying equipment may include a switching valve 500, which, through its switching function, connects the space inside the airbag 3 to either the inflation device 300 or the space outside the airbag 3. When the switching valve 500 is switched to connect the airbag 3 to the inflation device 300, the airbag 3 can be inflated by the inflation device 300, causing the airbag 3 to expand and open the normally closed valve of the battery cell 400. When switched to connect the internal space of the airbag 3 to the external space of the airbag 3, the gas inside the airbag 3 is released to the outside of the airbag 3 through the switching valve 500, causing the airbag 3 to deflate. The airbag 3 can be inflated and deflated through a single interface, and the valve opening assembly 100 and valve opening system may not have a device for deflation of the airbag 3; the switching valve 500 can be used to switch the deflation of the airbag 3.

[0088] For example, please refer to Figure 7The drying equipment may also include a pressure relief pipeline 600 connected to the switching valve 500. The switching valve 500 connects the space inside the airbag 3 to the pressure relief pipeline 600 to depressurize the airbag 3.

[0089] For example, both ends of the pressure-applying body 2 are provided with mounting parts 1, and each mounting part 1 is provided with an airbag 3.

[0090] In this embodiment, since the airbag 3 is located between the pressure-applying body 2 and the first limiting part 11, when the airbag 3 is inflated, the airbag 3 expands and squeezes the pressure-applying body 2. The pressure-applying body 2 can then move towards the normally closed valve of the battery cell 400, allowing it to apply pressure to the normally closed valve of the battery cell 400 to open it. Keeping the airbag 3 in an inflated state, the inflated airbag 3 continuously squeezes the pressure-applying body 2, allowing it to continuously apply pressure to the normally closed valve of the battery cell 400 to keep it open. This facilitates heating and drying the space inside the casing of the battery cell 400.

[0091] Understandably, the heating furnace can be evacuated to a vacuum, opening the normally closed valve of the battery cell 400 inside the furnace, and the space inside the casing of the battery cell 400 can also be evacuated to a vacuum. After the space inside the casing of the battery cell 400 is dried, before the vacuum inside the heating furnace is broken, the air bag 3 is deflated. The inflated air bag 3 contracts as the air is deflated, and the pressure exerted by the pressure body 2 on the normally closed valve is insufficient to open the normally closed valve. The normally closed valve of the battery cell 400 closes. Afterward, even if the vacuum inside the heating furnace is broken, the space inside the casing of the battery cell 400 can maintain a good vacuum and dry state because the normally closed valve of the battery cell 400 is already closed.

[0092] In one embodiment, please refer to Figure 3 and Figure 4 The airbag 3 is ring-shaped and is fitted onto the mounting component 1.

[0093] In this embodiment, the annular airbag 3 fitted onto the mounting component 1 allows the airbag 3 to apply a more uniform force to the pressure-applying body 2 around the mounting component 1, which is beneficial for the pressure-applying body 2 to move more smoothly on the mounting component 1.

[0094] In one embodiment, please refer to Figure 3 and Figure 4 The airbag 3 is circular in shape.

[0095] In this embodiment, the circular airbag 3 is fitted onto the mounting component 1, so that the force exerted by the airbag 3 on the pressure-applying body 2 around the mounting component 1 is more uniform, which is conducive to the smoother movement of the pressure-applying body 2 on the mounting component 1.

[0096] It is understood that the shape of the annular airbag 3 is not limited. For example, the shape of the airbag 3 can be a square ring.

[0097] Understandably, the shape of airbag 3 is not limited.

[0098] For example, the airbag 3 between the pressure-applying body 2 and the first limiting part 11 may include a plurality of sub-bags, which are arranged at circumferential intervals along the mounting member 1.

[0099] For example, the airbag 3 is located on one side of the mounting 1.

[0100] In one embodiment, please refer to Figure 3 and Figure 4 The mounting component 1 includes a guide shaft 12 and a first limiting block 13. The pressure-applying body 2 is movably sleeved on the guide shaft 12. The first limiting block 13 is connected to one end of the guide shaft 12, and a first limiting portion 11 is formed in the first limiting block 13.

[0101] For example, the shape of the first limiting block 13 can be either circular or square.

[0102] In this embodiment, the pressure-applying body 2 is sleeved on the guide shaft 12, which enables the guide shaft 12 to guide the pressure-applying body 2 to move axially along the guide shaft 12. This facilitates the accurate application of pressure to the normally closed valve by the guide shaft 12 to open the normally closed valve.

[0103] It is understood that the specific structure of the mounting component 1 is not limited. For example, the pressure-applying body 2 can be guided by a guide rail and a slider, with the pressure-applying body 2 connected to the slider.

[0104] In one embodiment, please refer to Figure 3 and Figure 4 The mounting component 1 also includes a second limiting block 14, which is connected to one end of the guide shaft 12 away from the first limiting block 13. The pressure applying body 2 is located between the first limiting block 13 and the second limiting block 14 along the axial direction of the guide shaft 12. The pressure applying body 2 can move to abut against the second limiting block 14.

[0105] In this embodiment, the pressure-applying body 2 is located between the first limiting block 13 and the second limiting block 14 along the axial direction of the guide shaft 12. The pressure-applying body 2 can move to abut against the second limiting block 14. On the one hand, the first limiting block 13 and the second limiting block 14 can prevent the pressure-applying body 2 from disengaging from the guide shaft 12 along the axial direction of the guide shaft 12. On the other hand, the first limiting block 13 and the second limiting block 14 can constrain the extreme position of the pressure-applying body 2 along the axial direction of the guide shaft 12, reducing the possibility that the pressure-applying body 2 may move too close to the normally closed switch and damage the normally closed switch of the battery cell 400.

[0106] In one embodiment, please refer to Figure 3 and Figure 4 The valve opening assembly 100 also includes an elastic element 4, which is located between the pressure applying body 2 and the second limiting block 14.

[0107] For example, the elastic element 4 can be a spring.

[0108] For example, the elastic element 4 can be a rubber sleeve or a silicone sleeve.

[0109] In this embodiment, during the process of the airbag 3 inflating and squeezing the pressure-applying body 2 to apply pressure to the normally closed valve, the elastic element 4 located between the pressure-applying body 2 and the second limiting block 14 can play a certain buffering role, reducing the impact of the pressure-applying body 2 on the normally closed valve of the battery cell 400 during the inflation of the airbag 3. In addition, during the depressurization process of the airbag 3, the elastic force of the elastic element 4 can push the pressure-applying body 2 away from the normally closed valve and reset it. On the one hand, this facilitates the rapid deflation of the airbag 3, and on the other hand, pushing the pressure-applying body 2 away from the normally closed valve of the battery cell 400 during the deflation process helps to reduce damage to the normally closed valve of the battery cell 400.

[0110] In one embodiment, please refer to Figure 3 and Figure 4 Four elastic elements are set on the guide shaft 12.

[0111] In this embodiment, the elastic element 4 is sleeved on the guide shaft 12, so that the guide shaft 12 can constrain the position of the elastic element 4 in the radial direction of the guide shaft 12, thereby reducing the possibility that the elastic element 4 may come out from between the pressure body 2 and the second limiting block 14 in the radial direction of the guide shaft 12.

[0112] In one embodiment, please refer to Figures 3-6 The pressure-applying body 2 includes a support member 21 and a flexible member 22. The support member 21 is movably disposed on the mounting member 1, and the airbag 3 is located between the support member 21 and the first limiting part 11. The flexible member 22 is connected to the support member 21 and is located on the side of the support member 21 opposite to the airbag 3.

[0113] For example, the flexible element 22 may be made of rubber or silicone.

[0114] In this embodiment, the support member 21 can better support the flexible member 22 to apply force to the normally closed valve of the battery cell 400. The flexible member 22 contacts the normally closed valve of the battery cell 400 to apply force to open the normally closed valve. Since there is flexible contact between the flexible member 22 and the battery cell 400, it is beneficial to reduce damage to the normally closed valve of the battery cell 400.

[0115] It is understood that the specific structure of the pressure-applying body 2 is not limited. For example, the pressure-applying body 2 may include a support member 21, and the pressure-applying body 2 may not have a flexible member 22.

[0116] In one embodiment, please refer to Figure 5 The flexible member 22 has a plurality of spaced first ventilation grooves 221 and a plurality of spaced second ventilation grooves 222. The plurality of first ventilation grooves 221 and the plurality of second ventilation grooves 222 are arranged in a cross pattern. The first ventilation grooves 221 and the second ventilation grooves 222 are both located on the side of the flexible member 22 away from the airbag 3.

[0117] For example, please refer to Figure 5 Multiple first ventilation slots 221 are arranged in parallel and extend in a straight line.

[0118] For example, please refer to Figure 5 Multiple second ventilation slots 222 are arranged in parallel and extend in a straight line.

[0119] For example, please refer to Figure 5 At the intersection of the first vent groove 221 and the second vent groove 222, the normally closed valve is contacted to apply pressure to open the normally closed valve. The space inside the casing of the battery cell 400 is connected to the external space of the casing of the battery cell 400 through the opened normally closed valve, the first vent groove 221 and the second vent groove 222.

[0120] In this embodiment, when the normally closed valve of the battery cell 400 is open, the space inside the casing of the battery cell 400 is connected to the external space of the casing of the battery cell 400 through the normally closed valve, the first vent groove 221 and the second vent groove.

[0121] It is understood that, with the normally closed valve open, the method of connecting the internal space of the battery cell 400's casing to the external space is not limited. For example, the pressure-applying body 2 is formed with a boss, which presses open the normally closed valve. The size of the boss is configured such that it does not block the valve port of the normally closed valve.

[0122] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way.

Claims

1. A valve opening assembly, characterized in that: include: A mounting member, wherein one end of the mounting member has a first limiting portion; A pressure-applying body, movably disposed on the mounting member; An airbag is located between the pressure-applying body and the first limiting portion, and the airbag can be repeatedly inflated and deflated.

2. The valve opening assembly according to claim 1, characterized in that: The airbag is annular in shape and is sleeved on the mounting member.

3. The valve opening assembly according to claim 2, characterized in that: The air bag is in the shape of a circular ring.

4. The valve opening assembly according to any one of claims 1 to 3, characterized in that: The mounting member comprises: A guide shaft, wherein the pressure-applying body is movably sleeved on the guide shaft; The first limiting block is connected to one end of the guide shaft, and the first limiting portion is formed on the first limiting block.

5. The valve opening assembly according to claim 4, characterized in that: The mounting member also includes a second limit block, which is connected to one end of the guide shaft away from the first limit block. The pressure-applying body is located between the first limit block and the second limit block along the axial direction of the guide shaft, and the pressure-applying body can move to abut against the second limit block.

6. The valve opening assembly according to claim 5, characterized in that: The valve opening assembly further includes an elastic member, and the elastic member is located between the pressure-applying body and the second limiting block.

7. The valve opening assembly according to claim 6, characterized in that: The elastic member is sleeved on the guide shaft.

8. The valve opening assembly according to any one of claims 1 to 3, characterized in that: The pressure applying subject comprises: A support member, movably disposed on the mounting member, wherein the airbag is located between the support member and the first limiting portion; A flexible member is connected to the support member, and the flexible member is located on a side of the support member away from the airbag.

9. The valve opening assembly according to claim 8, characterized in that: The flexible member is formed with a plurality of first air permeable grooves arranged at intervals and a plurality of second air permeable grooves arranged at intervals, the plurality of first air permeable grooves and the plurality of second air permeable grooves are arranged crosswise, and the first air permeable grooves and the second air permeable grooves are both located on a side of the flexible member away from the airbag.

10. A valve opening assembly, characterized in that: include: Pedestal; The valve opening assembly according to any one of claims 1 to 9, wherein the mounting member is connected to the base; The container is located below the corresponding pressure-applying body, the container is mounted on the base, and the container is used to carry the battery monomer.

11. A drying device, characterized in that: include: Heating furnace; An air charging device, located in the heating furnace; According to the valve opening assembly according to claim 10, the heating furnace is used to dry the battery cells carried by the valve opening assembly located in the heating furnace, and the inflation device is used to inflate the airbag.

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