Valve opening device and processing equipment for battery production

Abstract

The embodiment of the utility model provides a valve opening device and processing equipment for battery production. The valve opening device comprises a mounting seat, a valve body, a valve opening unit and an elastic unit, the mounting base is provided with a first runner penetrating through the mounting base. A containing cavity is defined by the valve body and the installation base. The valve body is provided with a first through hole, and the first flow channel communicates with the containing cavity. And a second flow channel is arranged in the valve opening unit. The valve opening unit is slidably arranged in the first through hole in a penetrating mode. The valve opening unit comprises an opening state and a closing state, in the opening state, the containing cavity communicates with the second flow channel, and in the closing state, the containing cavity does not communicate with the second flow channel. The elastic unit is located between one end of the valve opening unit and the mounting base. The valve opening unit can be switched from a closed state to an open state through movement under the action of external force, and enables the elastic unit to generate elastic deformation. And when the external force is removed, the valve opening unit is reset under the elastic force action of the elastic reset piece. The serial time (liquid preparation time) can be reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production equipment, and in particular to a valve opening device and processing equipment for battery production. Background Art

[0002] This section is intended to provide a background or context for the embodiments of the present application. No description herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] In the related art, the vacuum injection method is often used for injection after the battery is packaged. When injecting lithium batteries, the injection nozzle is always open and connected to the environment when used on the injection cup. The liquid preparation process cannot be carried out before the battery is sealed. Therefore, the liquid preparation process is required after the battery is sealed, which increases the serial time (liquid preparation time) and reduces production efficiency. Summary of the invention

[0004] In view of this, the embodiments of the present application hope to provide a normally closed valve opening device and processing equipment for battery production, which can reduce the serial time (liquid preparation time) and improve production efficiency.

[0005] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application provides a valve opening device, comprising:

[0006] A mounting seat having a first flow channel running through the mounting seat;

[0007] A valve body is disposed on the mounting seat and defines an accommodating cavity with the mounting seat, the valve body is provided with a first through hole, and the first flow channel is communicated with the accommodating cavity;

[0008] a valve opening unit, wherein a second flow channel is provided inside the valve opening unit, the valve opening unit is slidably arranged in the first through hole, the valve opening unit includes an open state and a closed state, in which the accommodating chamber is in communication with the second flow channel, and in which the accommodating chamber is not in communication with the second flow channel;

[0009] An elastic unit, located between one end of the valve opening unit and the mounting seat;

[0010] The valve opening unit can switch from the closed state to the open state by moving under the action of external force, and cause the elastic unit to produce elastic deformation; when the external force is removed, the valve opening unit is reset under the elastic force of the elastic reset member.

[0011] The embodiment of the present application provides a valve opening device, including a mounting seat, a valve body, a valve opening unit and an elastic unit. By setting the valve opening unit including an open state and a closed state, in the closed state, the accommodating chamber of the valve body is not connected to the second flow channel of the valve opening unit, so that even if the electrolyte in the injection cup enters the accommodating chamber through the first flow channel of the mounting seat, the electrolyte in the accommodating chamber will not flow out through the second flow channel. In the process of injecting liquid into the battery, the battery can exert a force on the valve opening unit, and the valve opening unit can switch from the closed state to the open state by moving under the action of the external force, and cause the elastic unit to produce elastic deformation. At this time, the accommodating chamber of the valve body is connected to the second flow channel of the valve opening unit, and the electrolyte in the accommodating chamber can enter the battery through the second flow channel to achieve injection. After the injection is completed, the valve device and the battery are separated, and the valve opening unit is reset under the elastic force of the elastic reset member, and switches from the open state to the closed state. That is to say, the valve opening device is a normally closed valve opening device, so that the electrolyte can be injected into the liquid filling cup in advance at any time before the battery and the liquid filling cup are combined, which can reduce the serial time (liquid preparation time) and improve the production efficiency and production cycle. In addition, by providing an elastic unit, when the external force is removed, the valve opening unit automatically resets and switches to a closed state under the elastic force of the elastic reset member, thereby improving the problem of electrolyte leakage.

[0012] In some embodiments, the valve opening unit includes a valve opening portion and a sliding rod connected to the valve opening portion, the valve opening portion protrudes from the sliding rod along the circumferential direction, the second flow channel passes through the sliding rod, the sliding rod is slidably disposed in the first through hole, and the elastic member is located between the valve opening portion and the mounting seat;

[0013] The side wall of the accommodating cavity forms a first sealing surface, and the valve opening portion is provided with a second sealing surface. In the closed state, the first sealing surface is sealed with the second sealing surface, and in the open state, the first sealing surface is separated from the second sealing surface.

[0014] The valve opening unit is provided to include a valve opening portion and a sliding rod connected to the valve opening portion, wherein the valve opening portion is used to cooperate with the valve body to achieve the connection or disconnection (blocking) between the second flow channel and the accommodating chamber. The sliding rod can be slidably arranged in the first through hole to guide the valve opening unit. In addition, the external force exerts a force on the sliding rod to switch the valve opening unit between the open state and the closed state. The side wall of the accommodating chamber is formed with a first sealing surface, and the valve opening portion is provided with a second sealing surface. In the closed state, the first sealing surface and the second sealing surface are sealed and matched, and in the open state, the first sealing surface and the second sealing surface are separated. In other words, the first sealing surface is the surface where the side wall of the accommodating chamber cooperates with the valve opening portion, and the second sealing surface is the surface where the valve opening portion cooperates with the side wall of the accommodating chamber. The valve body and the valve opening portion are in surface contact to achieve the connection or disconnection (blocking) between the second flow channel and the accommodating chamber, thereby improving the reliability of the valve opening device.

[0015] In some embodiments, along the flow direction of the fluid, the distance between the first sealing surface and the central axis of the sliding rod gradually decreases.

[0016] Along the flow direction of the fluid, by setting the distance between the first sealing surface and the central axis of the sliding rod to gradually decrease, that is, the first sealing surface is set inclined, so that the flow of the fluid is more favorable and the flow resistance is reduced. In addition, it is beneficial for all the liquid in the accommodating cavity to flow into the second flow channel, saving electrolyte and improving the injection accuracy of the battery.

[0017] In some embodiments, the second flow channel includes a first sub-flow channel and a second sub-flow channel that are interconnected, the first sub-flow channel extends along the axial direction of the sliding rod, and the second sub-flow channel extends along the radial direction of the sliding rod and passes through the circumferential side wall of the sliding rod.

[0018] By configuring the second flow channel to include a first sub-flow channel extending along the axial direction of the sliding rod and a second sub-flow channel extending along the radial direction of the sliding rod, it is advantageous to achieve communication between the second flow channel and the accommodating cavity and the internal space of the battery.

[0019] In some embodiments, the valve opening device further includes a buffer pad having a second through hole, the buffer pad is disposed at an end of the valve body away from the mounting seat, and the valve opening unit is slidably disposed in the second through hole.

[0020] The valve opening device further comprises a buffer pad having a second through hole, and the buffer pad is arranged at one end of the valve body away from the mounting seat. Thus, when the valve opening device is used to open the switch valve of the battery, the valve body can abut against the battery through the buffer pad, that is, the buffer pad can play a buffering role to prevent the valve body from damaging the surface of the battery.

[0021] In some embodiments, in the closed state, one end of the valve opening unit away from the elastic unit protrudes from an end surface of the buffer pad away from the valve body.

[0022] By setting the end face of the valve opening unit away from the elastic unit to be higher than the end face of the buffer pad, it is beneficial for the valve opening unit of the valve opening device to contact the switch valve of the battery, that is, it is beneficial for the valve opening device to open the switch valve of the battery for liquid injection.

[0023] In some embodiments, in the closed state, an end of the valve opening unit away from the elastic unit is flush with an end surface of an end of the buffer pad away from the valve body.

[0024] By setting the end face of the valve opening unit away from the elastic unit to be flush with the end face of the buffer pad, the buffer pad and the valve opening unit can be in contact with the battery at the same time. In this way, the valve opening device can be sealed with the end face of the battery through the buffer pad, thereby increasing the sealing contact area, thereby improving the sealing efficiency and improving the leakage situation.

[0025] In some embodiments, in the closed state, one end of the valve opening unit away from the elastic unit is located in the second through hole.

[0026] By setting the end face of the valve opening unit away from the elastic unit to be lower than the end face of the buffer pad, or to be flush with the end face of the buffer pad, the buffer pad can be made to contact the battery before the valve opening unit, or at the same time. In this way, the valve opening device can be sealed with the end face of the battery through the buffer pad, thereby increasing the sealing contact area, thereby improving the sealing efficiency and improving the leakage situation.

[0027] In some embodiments, the elastic unit includes a guide column and an elastic member sleeved on the guide column, the guide column abuts against the mounting seat, and one end of the elastic member away from the guide column abuts against the valve opening unit.

[0028] By providing a guide column for abutting against the mounting seat, it is convenient to arrange the elastic unit between the valve opening unit and the mounting seat. In addition, by sleeve-arranging the elastic member on the guide column, the connection reliability of the elastic member can be improved.

[0029] In some embodiments, the guide column includes a base and a guide column connected to the base, the elastic member is sleeved on the guide column, and the base abuts against the mounting seat; the base is provided with a third flow channel, and the first flow channel is connected to the accommodating cavity through the third flow channel.

[0030] In this way, the contact area with the mounting seat can be increased, thereby improving the reliability of the connection between the guide column and the mounting seat. In addition, it is more conducive to arranging a third flow channel on the base so that the first flow channel is connected to the accommodating cavity through the third flow channel.

[0031] In some embodiments, the valve opening device further includes a first sealing member, and the first sealing member is sealingly clamped between the valve body and the mounting seat.

[0032] By providing the first sealing member, the sealing clamp is arranged between the valve body and the mounting seat. In other words, the first sealing member is used to seal the mounting gap between the valve body and the mounting seat, thereby improving the situation where the electrolyte in the accommodating cavity flows out of the mounting gap between the valve body and the mounting seat, thereby improving the sealing performance of the valve opening device.

[0033] In some embodiments, the valve opening device further includes a second sealing member, and the second sealing member is sealingly sandwiched between the valve opening unit and the valve body.

[0034] By providing a second sealing member, the sealing member is disposed between the valve opening unit and the valve body. In other words, the second sealing member is used to seal the installation gap between the valve opening unit and the valve body, thereby improving the situation where the electrolyte in the accommodating cavity flows out of the installation gap between the valve opening unit and the valve body, thereby improving the sealing performance of the valve opening device.

[0035] In some embodiments, the valve body has a sealing groove communicated with the first through hole, and the second sealing member is disposed in the sealing groove.

[0036] The valve body has a sealing groove connected to the first through hole, that is, part of the hole wall of the first through hole is concave to form an annular sealing groove, and the second sealing member is arranged in the sealing groove. To a certain extent, it can prevent the second sealing member from being driven by the valve opening unit during the sliding process in the first through hole, which is beneficial to improving the reliability of the second sealing member.

[0037] A second aspect of an embodiment of the present application provides a processing device for battery production, wherein the battery includes a switch valve, and the processing device includes:

[0038] The valve opening device described above is used to open the switch valve to connect the second flow channel with the internal cavity of the battery.

[0039] The processing equipment for battery production provided by the embodiment of the present application includes a valve opening device of any embodiment of the present application, and the valve opening device includes a mounting seat, a valve body, a valve opening unit and an elastic unit. By setting a valve opening unit including an open state and a closed state, in the closed state, the accommodating cavity of the valve body is not connected to the second flow channel of the valve opening unit, so that even if the electrolyte in the injection cup enters the accommodating cavity through the first flow channel of the mounting seat, the electrolyte in the accommodating cavity will not flow out through the second flow channel. In the process of injecting liquid into the battery, the battery can exert a force on the valve opening unit, and the valve opening unit can be switched from the closed state to the open state by movement under the action of external force, and the elastic unit is elastically deformed. At this time, the accommodating cavity of the valve body is connected to the second flow channel of the valve opening unit, and the electrolyte in the accommodating cavity can enter the battery through the second flow channel to achieve injection. After the injection is completed, the valve device and the battery are separated, and the valve opening unit is reset under the elastic force of the elastic reset member, and switches from the open state to the closed state. That is to say, the valve opening device is a normally closed valve opening device, so that the electrolyte can be injected into the liquid filling cup in advance at any time before the battery and the liquid filling cup are combined, which can reduce the serial time (liquid preparation time) and improve the production efficiency and production cycle. In addition, by providing an elastic unit, when the external force is removed, the valve opening unit automatically resets and switches to a closed state under the elastic force of the elastic reset member, thereby improving the problem of electrolyte leakage.

[0040] In some implementations, the opening pressure of the valve opening device is greater than or equal to the opening pressure of the switch valve.

[0041] By setting the opening pressure of the valve opening device to be greater than or equal to the opening pressure of the switch valve, it is possible to avoid the situation where the switch valve of the battery is still in a closed state after the valve opening device is opened, thereby improving the problem of electrolyte leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A partial structural schematic diagram of a processing device for battery production according to an embodiment of the present application;

[0043] Figure 2 for Figure 1 A cross-sectional view of the embodiment of the present invention, wherein the second flow channel is in sealing cooperation with the accommodating cavity;

[0044] Figure 3 for Figure 1 A cross-sectional view of the embodiment of the present invention, wherein the second flow channel is separated from the accommodating cavity;

[0045] Figure 4 for Figure 1 The enlarged view of point A in the middle;

[0046] Figure 5 for Figure 3 The enlarged view of point B in the middle;

[0047] Figure 6 This is a structural schematic diagram of a valve opening device according to an embodiment of the present application from a first perspective;

[0048] Figure 7 This is a structural schematic diagram of a valve opening device according to an embodiment of the present application from a second viewing angle;

[0049] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0050] Fig. 9 for Figure 6 Exploded diagram.

[0051] Description of Reference Numerals

[0052] 1. Valve opening device; 1a. Accommodating chamber; 1b. First sealing surface; 11. Mounting seat; 11a. First flow channel; 12. Valve body; 12a. First through hole; 12b. Sealing groove; 13. Valve opening unit; 13a. Second flow channel; 13b. First sub-flow channel; 13c. Second sub-flow channel; 131. Valve opening part; 131a. Second sealing surface; 132. Sliding rod; 133. Guide rod; 14. Elastic unit; 141. Guide column; 141a. Base; 141b. Guide column; 141c. Third flow channel; 142. Elastic member; 15. Buffer pad; 15a. Second through hole; 16. First sealing member; 17. Second sealing member; 2. Battery; 21. Switch valve; 3. Liquid filling cup tray; 4. Liquid filling cup; 5. Battery tray. DETAILED DESCRIPTION

[0053] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions.

[0055] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

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

[0057] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0058] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", "height direction", "first direction", and "second direction" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0059] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0060] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0061] With the development of clean energy, more and more devices use electric energy as driving energy, and then power batteries that can store more electric energy and can be charged and discharged repeatedly are developing rapidly, such as lithium-ion batteries. Among them, power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields.

[0062] With the country's vigorous promotion of new energy vehicles, new energy vehicles have ushered in a great opportunity for development. The safety and stability of automobiles have always been people's greatest concern. Therefore, improving the safety of new energy vehicles will be one of the important factors that determine whether new energy vehicles can be quickly popularized. Battery modules are the main components of the battery pack of new energy vehicles. Improving the safety of battery modules is an important way to improve the safety of new energy vehicles.

[0063] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0064] In the present application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., which is not limited in the embodiments of the present application. The battery cell may be cylindrical, rectangular or in other shapes, etc., which is not limited in the embodiments of the present application.

[0065] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode collector. The negative electrode collector not coated with the negative electrode active material layer protrudes from the negative electrode collector coated with the negative electrode active material layer. The negative electrode collector not coated with the negative electrode active material layer serves as the negative electrode tab. The negative electrode current collector may be made of copper, and the negative electrode active material may be carbon or silicon. In order to ensure that a large current can pass without melting, the positive electrode tabs are multiple and stacked together, and the negative electrode tabs are multiple and stacked together. The material of the separator may be PP (polypropylene) or PE (polyethylene).

[0066] The battery cell also includes an insulating film and a shell. The insulating film is coated on the outside of the electrode assembly, and the shell encapsulates the electrode assembly coated with the insulating film to form a battery cell. The insulating film can be a Mylar film, and the shell can be an aluminum shell. After the electrode assembly is wound and formed, the Mylar film and the shell are encapsulated through the Mylar wrapping process and the shelling process. Among them, the Mylar film plays the role of sealing and protecting the electrode assembly, and the Mylar film can effectively insulate the electrode assembly and the shell from each other to avoid internal short circuits in the battery cell. The shell plays a protective role.

[0067] The injection process is an important step in the battery manufacturing process. The injection accuracy is directly related to the cycle performance, safety performance, consistency, etc. of lithium ions.

[0068] In the related art, the vacuum injection method is often used for injection after the battery is packaged. When injecting liquid into the battery, the injection nozzle is always open and connected to the environment when used on the injection cup. The liquid preparation process cannot be carried out before the battery is sealed. Therefore, the liquid preparation process is required after the battery is sealed, which increases the serial time (liquid preparation time) and reduces production efficiency.

[0069] In order to reduce the serial time (liquid preparation time) and improve the production efficiency, an embodiment of the present application provides a valve opening device, which includes a mounting seat, a valve body, a valve opening unit and an elastic unit. The mounting seat has a first flow channel that runs through the mounting seat. The valve body is arranged on the mounting seat and defines a accommodating cavity with the mounting seat. The valve body is provided with a first through hole, and the first flow channel is connected to the accommodating cavity. A second flow channel is arranged inside the valve opening unit. The valve opening unit can be slidably penetrated in the first through hole. The valve opening unit includes an open state and a closed state. In the open state, the accommodating cavity is connected to the second flow channel, and in the closed state, the accommodating cavity is not connected to the second flow channel. The elastic unit is located between one end of the valve opening unit and the mounting seat. The valve opening unit can switch from a closed state to an open state by moving under the action of an external force, and cause the elastic unit to produce elastic deformation. When the external force is removed, the valve opening unit is reset under the elastic force of the elastic reset member.

[0070] The specific use scenario of the valve opening device is not limited here. For example, the valve opening device can be used for battery filling or vacuuming operations.

[0071] In the embodiment of the present application, the valve opening device is used for battery liquid injection as an example for description.

[0072] See also Figures 1 to 9 The embodiment of the present application also provides a processing device for the production of a battery 2, the battery 2 includes a switch valve 21, and the processing equipment includes a valve opening device 1 of any embodiment of the present application, the valve opening device 1 is used to open the switch valve 21 to connect the second flow channel 13a with the internal cavity of the battery 2.

[0073] That is to say, when the switch valve 21 is not subjected to external force, the internal cavity of the battery 2 remains relatively sealed from the external environment.

[0074] For example, see Figures 1 to 3 The processing equipment also includes a liquid filling cup tray 3, and the valve opening device 1 is arranged on the liquid filling cup tray 3. When the liquid filling cup 4 is arranged on the liquid filling cup tray 3, the cavity in the liquid filling cup 4 is connected with the first flow channel 11a of the valve opening device 1, so that the electrolyte in the liquid filling cup 4 enters the accommodating cavity 1a through the first flow channel 11a.

[0075] For example, see Figures 1 to 3 The processing equipment also includes a battery tray 5, and the battery 2 is arranged on the battery tray 5. The valve opening device 1 and the switch valve 21 can be docked by controlling the movement of the liquid filling cup tray 3 and / or the battery tray 5.

[0076] See also Figure 3 and Figure 5When the battery 2 is injected with liquid, the valve opening device 1 can be used as a liquid injection nozzle, the valve opening device 1 is connected with the liquid injection cup 4, and the electrolyte in the liquid injection cup 4 flows into the accommodating chamber 1a from the first flow channel 11a of the valve opening device 1. In the open state, the electrolyte in the accommodating chamber 1a is injected into the battery 2 from the second flow channel 13a. In this way, after the valve opening device 1 abuts against the sealing device of the battery 2, the valve opening device 1 can isolate the switch valve 21 of the battery 2 from the external environment. The valve opening device 1 and the battery 2 continue to be relatively close, and the valve opening device 1 pushes open the sealing device of the battery 2, so that the inside of the battery 2 is connected with the second flow channel 13a, and the electrolyte smoothly enters the inside of the battery 2.

[0077] After filling is complete, refer to Figure 2 and Figure 4 The valve opening device 1 is first separated from the sealing device on the surface of the battery 2, so that the battery 2 and the sealing device of the battery 2 are restored. In this way, the interior of the battery 2 can be free from the influence of the external environment during the liquid injection process.

[0078] The processing equipment for producing the battery 2 provided in the embodiment of the present application includes the valve opening device 1 of any embodiment of the present application, and the valve opening device 1 includes a mounting seat 11, a valve body 12, a valve opening unit 13 and an elastic unit 14. By setting the valve opening unit 13 including an open state and a closed state, in the closed state, the accommodating chamber 1a of the valve body 12 is not connected with the second flow channel 13a of the valve opening unit 13, so that even if the electrolyte in the injection cup 4 enters the accommodating chamber 1a through the first flow channel 11a of the mounting seat 11, the electrolyte in the accommodating chamber 1a will not flow out through the second flow channel 13a. In the process of injecting liquid into the battery 2, the battery 2 can exert a force on the valve opening unit 13, and the valve opening unit 13 can be switched from the closed state to the open state by movement under the action of external force, and the elastic unit 14 is elastically deformed. At this time, the accommodating chamber 1a of the valve body 12 is connected with the second flow channel 13a of the valve opening unit 13, and the electrolyte in the accommodating chamber 1a can enter the battery 2 through the second flow channel 13a to achieve injection. After the injection is completed, the valve device 1 and the battery 2 are separated, and the valve opening unit 13 is reset under the elastic force of the elastic reset member, and switches from the open state to the closed state. In other words, the valve opening device 1 is a normally closed valve opening device 1, so that the electrolyte can be injected into the liquid injection cup 4 in advance at any time before the battery 2 is combined with the liquid injection cup 4, which can reduce the serial time (liquid preparation time) and improve the production efficiency and production rhythm. In addition, by providing the elastic unit 14, when the external force is removed, the valve opening unit 13 automatically resets and switches to the closed state under the elastic force of the elastic reset member, thereby improving the problem of electrolyte leakage.

[0079] In some embodiments, the opening pressure of the valve opening device 1 is greater than or equal to the opening pressure of the switch valve 21 .

[0080] The opening pressure of the valve opening device 1 is greater than the opening pressure of the switch valve 21, that is, after the valve opening device 1 abuts against the battery 2, the switch valve 21 is opened first and then the valve opening device 1 is opened due to the interaction force between the valve opening device 1 and the switch valve 21. In this way, during the injection process, it is possible to avoid the situation where the switch valve 21 of the battery 2 is still in a closed state after the valve opening device 1 is opened, thereby improving the problem of electrolyte leakage.

[0081] The opening pressure of the valve opening device 1 is equal to the opening pressure of the switch valve 21, that is, after the valve opening device 1 abuts against the battery 2, the switch valve 21 and the valve opening device 1 are opened simultaneously due to the interaction force between the valve opening device 1 and the switch valve 21. In this way, during the injection process, it is possible to avoid the situation where the switch valve 21 of the battery 2 is still in a closed state after the valve opening device 1 is opened, thereby improving the problem of electrolyte leakage.

[0082] By setting the opening pressure of the valve opening device 1 to be greater than or equal to the opening pressure of the switch valve 21, it is possible to avoid the situation where the switch valve 21 of the battery 2 is still in a closed state after the valve opening device 1 is opened, thereby improving the problem of electrolyte leakage.

[0083] The present application embodiment provides a valve opening device 1, see Figures 4 to 9 , the valve opening device 1 includes a mounting seat 11, a valve body 12, a valve opening unit 13 and an elastic unit 14. The mounting seat 11 has a first flow channel 11a that passes through the mounting seat 11. The valve body 12 is arranged on the mounting seat 11, and defines a accommodating chamber 1a with the mounting seat 11. The valve body 12 is provided with a first through hole 12a, and the first flow channel 11a is connected to the accommodating chamber 1a. A second flow channel 13a is arranged inside the valve opening unit 13. The valve opening unit 13 is slidably arranged in the first through hole 12a. The valve opening unit 13 includes an open state and a closed state. In the open state, the accommodating chamber 1a is connected to the second flow channel 13a, and in the closed state, the accommodating chamber 1a is not connected to the second flow channel 13a. The elastic unit 14 is located between one end of the valve opening unit 13 and the mounting seat 11. The valve opening unit 13 can switch from a closed state to an open state by moving under the action of an external force, and cause the elastic unit 14 to produce elastic deformation. When the external force is removed, the valve opening unit 13 is reset under the elastic force of the elastic reset member.

[0084] The valve opening device 1 includes a mounting seat 11 , and the valve opening device 1 can be connected to the liquid filling cup tray 3 through the mounting seat 11 .

[0085] The mounting seat 11 has a first flow channel 11 a penetrating through the mounting seat 11 , so that when the liquid filling cup 4 is docked with the liquid filling cup tray 3 , the space in the liquid filling cup 4 can be connected to the first flow channel 11 a .

[0086] The valve opening device 1 includes a valve body 12 , which is disposed on a mounting seat 11 and defines a receiving chamber 1 a with the mounting seat 11 , so that the electrolyte in the liquid injection cup 4 can enter the receiving chamber 1 a through the first flow channel 11 a .

[0087] There are many specific ways for the valve body 12 and the mounting seat 11 to define the accommodating chamber 1a. For example, in some embodiments, the valve body 12 may be provided with a first cavity, the mounting seat 11 may be provided with a second cavity, and the valve body 12 and the mounting seat 11 may be docked to define the accommodating chamber 1a. In other embodiments, the valve body 12 may be provided with a first cavity, and the mounting seat 11 may be covered on the first cavity to define the accommodating chamber 1a. In still other embodiments, the mounting seat 11 may be provided with a second cavity, and the valve body 12 may be covered on the second cavity to define the accommodating chamber 1a.

[0088] The specific manner in which the valve body 12 is disposed on the mounting seat 11 is not limited herein. Exemplarily, the valve body 12 and the mounting seat 11 are detachably connected, which is convenient for replacement and maintenance of parts in the valve opening device 1 .

[0089] The valve body 12 and the mounting seat 11 are connected by, for example, magnetic connection, clamping connection, fastening connection or plug connection.

[0090] See also Figure 8 A second flow channel 13a is provided inside the valve opening unit 13, and the valve opening unit 13 can be slidably penetrated in the first through hole 12a, that is, the valve opening unit 13 can slide along the first through hole 12a to achieve connection and disconnection between the accommodating chamber 1a and the second flow channel 13a.

[0091] The valve opening unit 13 includes an open state and a closed state, that is, the valve opening device 1 can be a normally closed valve opening device 1. In other words, when the valve opening device 1 is not subjected to external force, the bottom of the liquid injection cup 4 remains relatively sealed from the external environment. In this way, the electrolyte can be injected into the liquid injection cup 4 in advance at any time before the battery 2 and the liquid injection cup 4 are combined, which can reduce the serial time (liquid preparation time) and improve the production efficiency and production cycle.

[0092] See also Figure 8 The elastic unit 14 is located between one end of the valve opening unit 13 and the mounting seat 11. In this way, when the valve opening unit 13 is acted upon by an external force, the valve opening unit 13 moves toward the mounting seat 11 and causes the elastic unit 14 to undergo elastic deformation. At this time, the valve opening unit 13 switches from a closed state to an open state. When the external force is removed, the valve opening unit 13 resets under the elastic force of the elastic reset member. At this time, the valve opening unit 13 switches from an open state to a closed state.

[0093] The embodiment of the present application provides a valve opening device 1, including a mounting seat 11, a valve body 12, a valve opening unit 13 and an elastic unit 14. By setting the valve opening unit 13 including an open state and a closed state, in the closed state, the accommodating chamber 1a of the valve body 12 is not connected with the second flow channel 13a of the valve opening unit 13, so that even if the electrolyte in the injection cup 4 enters the accommodating chamber 1a through the first flow channel 11a of the mounting seat 11, the electrolyte in the accommodating chamber 1a will not flow out through the second flow channel 13a. In the process of injecting liquid into the battery 2, the battery 2 can exert a force on the valve opening unit 13, and the valve opening unit 13 can be switched from the closed state to the open state by movement under the action of external force, and the elastic unit 14 is elastically deformed. At this time, the accommodating chamber 1a of the valve body 12 is connected with the second flow channel 13a of the valve opening unit 13, and the electrolyte in the accommodating chamber 1a can enter the battery 2 through the second flow channel 13a to achieve injection. After the injection is completed, the valve device 1 and the battery 2 are separated, and the valve opening unit 13 is reset under the elastic force of the elastic reset member, and switches from the open state to the closed state. In other words, the valve opening device 1 is a normally closed valve opening device 1, so that the electrolyte can be injected into the liquid injection cup 4 in advance at any time before the battery 2 is combined with the liquid injection cup 4, which can reduce the serial time (liquid preparation time) and improve the production efficiency and production rhythm. In addition, by providing the elastic unit 14, when the external force is removed, the valve opening unit 13 automatically resets and switches to the closed state under the elastic force of the elastic reset member, thereby improving the problem of electrolyte leakage.

[0094] In some embodiments, see Figure 8 and Fig. 9 The valve opening unit 13 includes a valve opening portion 131 and a sliding rod 132 connected to the valve opening portion 131. The valve opening portion 131 protrudes from the sliding rod 132 in the circumferential direction. The second flow channel 13a passes through the sliding rod 132. The sliding rod 132 is slidably arranged in the first through hole 12a. The elastic member 142 is located between the valve opening portion 131 and the mounting seat 11. The side wall of the accommodating chamber 1a forms a first sealing surface 1b. The valve opening portion 131 is provided with a second sealing surface 131a. In the closed state, the first sealing surface 1b is sealed with the second sealing surface 131a. In the open state, the first sealing surface 1b is separated from the second sealing surface 131a.

[0095] That is to say, by controlling the contact and disconnection between the first sealing surface 1b and the second sealing surface 131a, it is determined whether the electrolyte can pass through the second flow channel 13a.

[0096] It should be noted that the specific structure of the valve opening unit 13 is not limited here. For example, the valve opening unit 13 includes a valve opening portion 131 and a sliding rod 132 connected to the valve opening portion 131, wherein the valve opening portion 131 is used to cooperate with the valve body 12 to achieve the connection or disconnection (blocking) between the second flow channel 13a and the accommodating chamber 1a. The sliding rod 132 is slidably arranged in the first through hole 12a to guide the valve opening unit 13. In addition, the external force acts on the sliding rod 132 to switch the valve opening unit 13 between the open state and the closed state.

[0097] The elastic member 142 is located between the valve opening portion 131 and the mounting seat 11, so that the valve opening unit 13 moves under the action of external force, causing the elastic unit 14 to produce elastic deformation. When the external force is removed, the valve opening unit 13 is reset under the elastic force of the elastic reset member.

[0098] The valve opening portion 131 protrudes from the sliding rod 132 along the circumferential direction, which is beneficial for the valve opening portion 131 to cooperate with the valve body 12 on the one hand, and can also prevent the valve opening portion 131 from escaping from the first through hole 12a on the other hand. In other words, the diameter of the sliding rod 132 is smaller than the aperture of the first through hole 12a, and the diameter of the valve opening portion 131 is larger than the aperture of the first through hole 12a.

[0099] The side wall of the accommodating chamber 1a forms a first sealing surface 1b, and the valve opening portion 131 is provided with a second sealing surface 131a. In the closed state, the first sealing surface 1b and the second sealing surface 131a are sealed and matched, and in the open state, the first sealing surface 1b and the second sealing surface 131a are separated. In other words, the first sealing surface 1b is the surface where the side wall of the accommodating chamber 1a and the valve opening portion 131 match, and the second sealing surface 131a is the surface where the valve opening portion 131 and the side wall of the accommodating chamber 1a match. The valve body 12 and the valve opening portion 131 are in surface contact to achieve the connection or disconnection (blocking) of the second flow channel 13a with the accommodating chamber 1a, thereby improving the reliability of the valve opening device 1.

[0100] In the open state, see Figure 3 and Figure 5 , the first sealing surface 1b is separated from the second sealing surface 131a, and there is a gap between the first sealing surface 1b and the second sealing surface 131a. In this way, the electrolyte in the accommodating chamber 1a flows from the gap between the first sealing surface 1b and the second sealing surface 131a to the second flow channel 13a, thereby connecting the accommodating chamber 1a with the second flow channel 13a.

[0101] The specific types of the first sealing surface 1b and the second sealing surface 131a are not limited here, for example, they can be a plane or a curved surface.

[0102] The valve opening unit 13 is configured to include a valve opening portion 131 and a sliding rod 132 connected to the valve opening portion 131, wherein the valve opening portion 131 is used to cooperate with the valve body 12 to achieve the connection or disconnection (blocking) between the second flow channel 13a and the accommodating chamber 1a. The sliding rod 132 can be slidably arranged in the first through hole 12a, and is used to guide the valve opening unit 13. In addition, the external force exerts a force on the sliding rod 132 to switch the valve opening unit 13 between the open state and the closed state. The side wall of the accommodating chamber 1a is formed with a first sealing surface 1b, and the valve opening portion 131 is provided with a second sealing surface 131a. In the closed state, the first sealing surface 1b is sealed with the second sealing surface 131a, and in the open state, the first sealing surface 1b is separated from the second sealing surface 131a. That is to say, the first sealing surface 1b is the surface where the side wall of the accommodating chamber 1a cooperates with the valve opening portion 131, and the second sealing surface 131a is the surface where the valve opening portion 131 cooperates with the side wall of the accommodating chamber 1a. The valve body 12 and the valve opening portion 131 are in surface contact to achieve the connection or disconnection (blocking) between the second flow channel 13a and the accommodating chamber 1a, thereby improving the reliability of the valve opening device 1.

[0103] It should be noted that the specific type of the first sealing surface 1b is not limited here.

[0104] In some embodiments, see Figures 8 to 9 The valve opening unit 13 further includes a guide rod 133, which is connected to one end of the valve opening portion 131 away from the sliding rod 132. One end of the elastic unit 14 away from the mounting seat 11 is sleeved on the guide rod 133. The reliability of the connection structure between the elastic unit 14 and the valve opening unit 13 is improved.

[0105] In some embodiments, see Figure 4 , Figure 5 and Figure 8 , along the flow direction of the fluid, the distance between the first sealing surface 1b and the central axis of the sliding rod 132 gradually decreases.

[0106] After the valve opening device 1 is assembled, the flow direction of the fluid may be from the top to the bottom of the valve opening device 1 .

[0107] The distance between the first sealing surface 1b and the central axis of the sliding rod 132 gradually decreases, that is, the first sealing surface 1b is contracted, or the first sealing surface 1b is inverted cone, or the first sealing surface 1b is inclined. It should be noted that the inclined first sealing surface 1b here can be a plane or a curved surface.

[0108] Along the flow direction of the fluid, by setting the distance between the first sealing surface 1b and the central axis of the sliding rod 132 to gradually decrease, that is, the first sealing surface 1b is set to be inclined, so that the flow of the fluid is more favorable and the flow resistance is reduced. In addition, it is beneficial for all the liquid in the accommodating chamber 1a to flow into the second flow channel 13a, saving electrolyte and improving the injection accuracy of the battery 2.

[0109] It should be noted that the specific type of the second flow channel 13a is not limited here.

[0110] In some embodiments, see Figure 5 and Figure 8 The second flow channel 13a includes a first sub-flow channel 13b and a second sub-flow channel 13c which are interconnected. The first sub-flow channel 13b extends along the axial direction of the sliding rod 132. The second sub-flow channel 13c extends along the radial direction of the sliding rod 132 and penetrates the circumferential side wall of the sliding rod 132.

[0111] The first sub-channel 13b extends along the axial direction of the sliding rod 132, which is conducive to cooperation with the battery 2 and facilitates the electrolyte in the accommodating cavity 1a to enter the battery 2 through the second channel 13a to achieve liquid injection.

[0112] Exemplarily, the center line of the first sub-channel 13 b is located on the center axis of the sliding rod 132 .

[0113] The specific number of the second sub-flow channels 13c is not limited here, for example, it can be one or more.

[0114] The multiple mentioned in the embodiments of the present application refers to a number of two or more than two.

[0115] The provision of a plurality of second sub-channels 13 c is beneficial for improving the liquid injection efficiency of the battery 2 .

[0116] The second sub-channel 13c extends along the radial direction of the sliding rod 132 and penetrates the circumferential side wall of the sliding rod 132, which means that one end of the second sub-channel 13c is connected to the first sub-channel 13b, and the other end penetrates the circumferential side wall of the sliding rod 132, so as to be connected to the accommodating chamber 1a. That is, in the open state, the electrolyte in the accommodating chamber 1a flows from the gap between the first sealing surface 1b and the second sealing surface 131a to the circumferential side wall of the sliding rod 132, and enters the second sub-channel 13c from the circumferential side wall of the sliding rod 132, so that the accommodating chamber 1a is connected to the second channel 13a.

[0117] By configuring the second flow channel 13a to include a first sub-flow channel 13b extending along the axial direction of the sliding rod 132 and a second sub-flow channel 13c extending along the radial direction of the sliding rod 132, it is advantageous to achieve communication between the second flow channel 13a and the accommodating chamber 1a and the internal space of the battery 2.

[0118] In some embodiments, see Figures 7 to 9 The valve opening device 1 further includes a buffer pad 15 having a second through hole 15a. The buffer pad 15 is disposed at one end of the valve body 12 away from the mounting seat 11. The valve opening unit 13 is slidably disposed in the second through hole 15a.

[0119] The specific material of the buffer pad 15 is not limited here, as long as it can play a buffering role. The buffer pad 15 is, for example, a resilient material such as silica gel or rubber.

[0120] The buffer pad 15 is disposed at an end of the valve body 12 away from the mounting seat 11 , that is, the buffer pad 15 is disposed on an end surface of the valve body 12 facing the battery 2 .

[0121] The valve opening unit 13 is slidably disposed in the second through hole 15 a , and the second through hole 15 a is used to avoid the valve opening unit 13 and / or the electrolyte.

[0122] The valve opening device 1 further includes a buffer pad 15 having a second through hole 15a, and the buffer pad 15 is disposed at one end of the valve body 12 away from the mounting seat 11. In this way, when the valve opening device 1 is used to open the switch valve 21 of the battery 2, the valve body 12 can abut against the battery 2 through the buffer pad 15, that is, the buffer pad 15 can play a buffering role to prevent the valve body 12 from damaging the surface of the battery 2.

[0123] It should be noted that the positional relationship between the end surface of the valve opening unit 13 and the end surface of the buffer pad 15 is not limited here.

[0124] In some embodiments, in the closed state, one end of the valve opening unit 13 away from the elastic unit 14 is located in the second through hole 15 a.

[0125] That is to say, the end face of the valve opening unit 13 away from the elastic unit 14 does not protrude from the end face of the second through hole 15a, or in other words, the end face of the valve opening unit 13 away from the elastic unit 14 is lower than the end face of the buffer pad 15, or is flush with the end face of the buffer pad 15, that is, the buffer pad 15 can contact the battery 2 before the valve opening unit 13, or at the same time, so that the valve opening device 1 can be sealed with the end face of the battery 2 through the buffer pad 15.

[0126] In this way, when injecting liquid, the lifting system brings the valve opening device 1 of the injection cup 4 into contact with the switch valve 21 group of the battery 2 (for example, controls the injection cup tray 3 to move toward the battery 2, or controls the battery tray 5 to move toward the injection cup 4). First, the buffer pad 15 of the valve opening device 1 of the injection cup 4 contacts the end face of the battery 2, and the injection channel formed after the contact remains sealed from the external environment. The injection cup tray 3 continues to descend and compresses the buffer pad 15 to make the valve opening unit 13 contact the switch valve 21. Since the valve opening device 1 and the switch valve 21 are subjected to the interaction force, the switch valve 21 is forced to open. At the same time, the valve opening device 1 is subjected to the interaction force, and the valve opening unit 13 moves upward synchronously, and the inside of the battery 2 is connected with the second flow channel 13a.

[0127] It should be noted that the valve opening device 1 and the switch valve 21 are not necessarily opened at the same time, which depends on the opening pressure of the valve opening device 1 and the opening pressure of the switch valve 21. The opening pressure of the valve opening device 1 depends on the elastic force that can be provided by the elastic unit 14. Preferably, the opening pressure of the valve opening device 1 is greater than the opening pressure of the switch valve 21. At this time, the switch valve 21 of the battery 2 opens before the valve opening device 1, reducing the leakage of the electrolyte.

[0128] Of course, in other embodiments, the opening pressure of the valve opening device 1 may be equal to the opening pressure of the switch valve 21. In this case, the switch valve 21 of the battery 2 is opened simultaneously with the valve opening device 1, which can also reduce the leakage of the electrolyte.

[0129] After the liquid injection is completed, the lifting system lifts the liquid injection cup tray 3. When the interaction force between the switch valve 21 of the battery 2 and the valve opening device 1 is less than the opening pressure of the switch valve 21 and the valve opening device 1, the switch valve 21 and the valve opening device 1 are closed, and the valve opening device 1 of the liquid injection cup 4 is separated from the switch valve 21 of the battery 2. Then, the buffer pad 15 of the liquid injection cup 4 is separated from the top of the battery 2, and the sealing state is released.

[0130] By setting the end face of the valve opening unit 13 away from the elastic unit 14 to be lower than the end face of the buffer pad 15, or to be flush with the end face of the buffer pad 15, the buffer pad 15 can be made to contact the battery 2 before the valve opening unit 13, or at the same time. In this way, the valve opening device 1 can be sealed with the end face of the battery 2 through the buffer pad 15, thereby increasing the sealing contact area, thereby improving the sealing efficiency and improving the leakage situation.

[0131] In some other embodiments, in the closed state, an end of the valve opening unit 13 away from the elastic unit 14 is flush with an end surface of the buffer pad 15 away from the valve body 12 .

[0132] By setting the end face of the valve opening unit 13 away from the elastic unit 14 to be flush with the end face of the buffer pad 15, the buffer pad 15 and the valve opening unit 13 can be in contact with the battery 2 at the same time. In this way, the valve opening device 1 can be sealed with the end face of the battery 2 through the buffer pad 15, thereby increasing the sealing contact area, thereby improving the sealing efficiency and improving the leakage situation.

[0133] In some other embodiments, please refer to Figure 4 , Figure 7 and Figure 8 In the closed state, one end of the valve opening unit 13 away from the elastic unit 14 protrudes from the end surface of the buffer pad 15 away from the valve body 12 .

[0134] In this way, when injecting liquid, the lifting system makes the valve opening device 1 of the injection cup 4 contact with the switch valve 21 group of the battery 2 (for example, controlling the injection cup tray 3 to move toward the battery 2, or controlling the battery tray 5 to move toward the injection cup 4). First, the valve opening unit 13 of the valve opening device 1 of the injection cup 4 contacts the switch valve 21 of the battery 2, and the injection channel formed after the contact remains sealed from the external environment. The injection cup tray 3 continues to descend so that the buffer pad 15 of the valve opening device 1 contacts the top of the battery 2. Since the valve opening device 1 and the switch valve 21 are subjected to the interaction force, the switch valve 21 is forced to open. At the same time, the valve opening device 1 is subjected to the interaction force, and the valve opening unit 13 moves upward synchronously, and the inside of the battery 2 is connected with the second flow channel 13a.

[0135] Of course, in other embodiments, the opening pressure of the valve opening device 1 may be equal to the opening pressure of the switch valve 21. In this case, the switch valve 21 of the battery 2 is opened simultaneously with the valve opening device 1, which can also reduce the leakage of the electrolyte.

[0136] After the liquid injection is completed, the lifting system lifts the liquid injection cup tray 3. When the interaction force between the switch valve 21 of the battery 2 and the valve opening device 1 is less than the opening pressure of the switch valve 21 and the valve opening device 1, the switch valve 21 and the valve opening device 1 are closed, and the valve opening device 1 of the liquid injection cup 4 is separated from the switch valve 21 of the battery 2, and the sealing state is released.

[0137] By setting the end face of the valve opening unit 13 away from the elastic unit 14 to be higher than the end face of the buffer pad 15, it is beneficial for the valve opening unit 13 of the valve opening device 1 to contact with the switch valve 21 of the battery 2, that is, it is beneficial for the valve opening device 1 to open the switch valve 21 of the battery 2 for liquid injection.

[0138] In some embodiments, see Figure 8 and Fig. 9The elastic unit 14 includes a guide post 141 and an elastic member 142 sleeved on the guide post 141. The guide post 141 abuts against the mounting seat 11, and one end of the elastic member 142 away from the guide post 141 abuts against the valve opening unit 13.

[0139] The guide column 141 is provided to abut against the mounting seat 11, so that the elastic unit 14 is arranged between the valve opening unit 13 and the mounting seat 11. In addition, the connection reliability of the elastic member 142 can be improved by sleeved the elastic member 142 on the guide column 141.

[0140] Exemplarily, the elastic member 142 is a spring.

[0141] Exemplarily, the center line of the guide post 141 coincides with the center line of the mounting seat 11 .

[0142] It should be noted that the specific structure of the guide pillar 141 is not limited here.

[0143] In some embodiments, see Figure 8 and Fig. 9 The guide column 141 includes a base 141a and a guide column 141b connected to the base 141a. The elastic member 142 is sleeved on the guide column 141b, and the base 141a abuts against the mounting base 11. The base 141a is provided with a third flow channel 141c, and the first flow channel 11a is connected to the accommodating chamber 1a through the third flow channel 141c.

[0144] The specific type of the base 141a is not limited here. The base 141a is, for example, in the shape of a disk or a plate, so that the contact area with the mounting seat 11 can be increased, thereby improving the reliability of the connection between the guide column 141 and the mounting seat 11. In addition, it is more advantageous to set the third flow channel 141c on the base 141a so that the first flow channel 11a is connected to the accommodating chamber 1a through the third flow channel 141c.

[0145] In some embodiments, see Figure 8 and Fig. 9 The valve opening device 1 further includes a first sealing member 16 , which is sealingly clamped between the valve body 12 and the mounting seat 11 .

[0146] The specific type of the first sealing member 16 is not limited here. The first sealing member 16 is, for example, a sealing ring, that is, the sealing ring is arranged at the connection between the valve body 12 and the mounting seat 11, which is beneficial to improve the sealing between the valve body 12 and the mounting seat 11.

[0147] The specific material of the first sealing member 16 is not limited here. The material of the first sealing member 16 is, for example, silicone or rubber.

[0148] By providing the first sealing member 16, the sealing clamp is arranged between the valve body 12 and the mounting seat 11. That is, the first sealing member 16 is used to seal the mounting gap between the valve body 12 and the mounting seat 11, thereby improving the situation where the electrolyte in the accommodating cavity 1a flows out of the mounting gap between the valve body 12 and the mounting seat 11, thereby improving the sealing performance of the valve opening device 1.

[0149] In some embodiments, please refer to Figure 8 and Fig. 9 The valve opening device 1 further includes a second sealing member 17 , which is sealingly sandwiched between the valve opening unit 13 and the valve body 12 .

[0150] The specific type of the second sealing member 17 is not limited here. The second sealing member 17 is, for example, a sealing ring, that is, the sealing ring is arranged at the connection between the valve opening unit 13 and the valve body 12, which is beneficial to improve the sealing between the valve opening unit 13 and the valve body 12.

[0151] The specific material of the second sealing member 17 is not limited here. The material of the second sealing member 17 is, for example, silicone or rubber.

[0152] By providing the second sealing member 17, the sealing member is disposed between the valve opening unit 13 and the valve body 12. That is, the second sealing member 17 is used to seal the installation gap between the valve opening unit 13 and the valve body 12, thereby improving the situation where the electrolyte in the accommodating chamber 1a flows out of the installation gap between the valve opening unit 13 and the valve body 12, thereby improving the sealing performance of the valve opening device 1.

[0153] Specifically, the second sealing member 17 is sealingly clamped between the sliding rod 132 and the valve body 12, and the liquid in the accommodating chamber 1a cannot flow out through the installation gap between the valve opening unit 13 and the valve body 12, and can only flow into the first sub-channel 13b from the second sub-channel 13c.

[0154] In some embodiments, see Figure 8 The valve body 12 has a sealing groove 12b connected to the first through hole 12a, and the second sealing member 17 is disposed in the sealing groove 12b.

[0155] The valve body 12 has a sealing groove 12b connected to the first through hole 12a, that is, part of the hole wall of the first through hole 12a is concave to form an annular sealing groove 12b, and the second sealing member 17 is arranged in the sealing groove 12b. To a certain extent, it can prevent the valve opening unit 13 from driving the second sealing member 17 during the sliding process in the first through hole 12a, which is beneficial to improving the reliability of the second sealing member 17.

[0156] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. means 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 embodiments of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0157] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A valve opening device, characterized in that: include: A mounting seat having a first flow channel running through the mounting seat; A valve body is disposed on the mounting seat and defines an accommodating cavity with the mounting seat, the valve body is provided with a first through hole, and the first flow channel is communicated with the accommodating cavity; a valve opening unit, wherein a second flow channel is provided inside the valve opening unit, the valve opening unit is slidably arranged in the first through hole, the valve opening unit includes an open state and a closed state, in which the accommodating chamber is in communication with the second flow channel, and in which the accommodating chamber is not in communication with the second flow channel; An elastic unit, located between one end of the valve opening unit and the mounting seat; The valve opening unit can be switched from the closed state to the open state by moving under the action of an external force, and causes the elastic unit to produce elastic deformation; when the external force is removed, the valve opening unit is reset under the elastic force of the elastic unit.

2. The valve opening device according to claim 1, characterized in that: The valve opening unit comprises a valve opening portion and a sliding rod connected to the valve opening portion, the valve opening portion protrudes from the sliding rod along the circumferential direction, the second flow channel passes through the sliding rod, the sliding rod is slidably arranged in the first through hole, and the elastic unit is located between the valve opening portion and the mounting seat; The side wall of the accommodating cavity forms a first sealing surface, and the valve opening portion is provided with a second sealing surface. In the closed state, the first sealing surface is sealed with the second sealing surface, and in the open state, the first sealing surface is separated from the second sealing surface.

3. The valve opening device according to claim 2, characterized in that: Along the flow direction of the fluid, the distance between the first sealing surface and the central axis of the sliding rod gradually decreases.

4. The valve opening device according to claim 2, characterized in that: The second flow channel includes a first sub-flow channel and a second sub-flow channel that are interconnected. The first sub-flow channel extends along the axial direction of the sliding rod, and the second sub-flow channel extends along the radial direction of the sliding rod and penetrates the circumferential side wall of the sliding rod.

5. The valve opening device according to claim 1, characterized in that: The valve opening device further comprises a buffer pad having a second through hole, wherein the buffer pad is arranged at one end of the valve body away from the mounting seat, and the valve opening unit is slidably arranged in the second through hole.

6. The valve opening device according to claim 5, characterized in that: In the closed state, one end of the valve opening unit away from the elastic unit protrudes from the end surface of the buffer pad away from the valve body; or In the closed state, the end of the valve opening unit away from the elastic unit is flush with the end surface of the buffer pad away from the valve body; or In the closed state, one end of the valve opening unit away from the elastic unit is located in the second through hole.

7. The valve opening device according to claim 1, characterized in that: The elastic unit comprises a guide column and an elastic member sleeved on the guide column, the guide column abuts against the mounting seat, and one end of the elastic member away from the guide column abuts against the valve opening unit.

8. The valve opening device according to claim 7, characterized in that: The guide column includes a base and a guide column connected to the base, the elastic member is sleeved on the guide column, and the base abuts against the mounting seat; the base is provided with a third flow channel, and the first flow channel is connected to the accommodating cavity through the third flow channel.

9. The valve opening device according to claim 1, characterized in that: The valve opening device further comprises a first sealing member, and the first sealing member is sealingly clamped between the valve body and the mounting seat.

10. The valve opening device according to claim 1, characterized in that: The valve opening device further includes a second sealing member, which is sealingly sandwiched between the valve opening unit and the valve body.

11. The valve opening device according to claim 10, characterized in that: The valve body has a sealing groove communicated with the first through hole, and the second sealing member is arranged in the sealing groove.

12. A processing equipment for battery production, characterized in that: The battery includes a switch valve, and the processing equipment includes: The valve opening device according to any one of claims 1 to 11 is used to open the switch valve to connect the second flow channel with the internal cavity of the battery.

13. The processing equipment according to claim 12, characterized in that: The opening pressure of the valve opening device is greater than or equal to the opening pressure of the switch valve.

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