Valve mechanism, liquid injection device, liquid injection system and battery manufacturing equipment

Abstract

The invention discloses a valve mechanism, a liquid injection device, a liquid injection system and battery manufacturing equipment, relates to the technical field of valves, and solves the problems of high cost and poor stability when a liquid injection valve is automatically closed. The valve mechanism comprises a valve body, a valve and a sealing assembly. Wherein a liquid outlet channel is arranged in the valve body, the fast flow section comprises a contraction section and a diffusion section, the end, communicated with the valve cavity, of the liquid outlet channel is communicated with the end, away from the valve cavity, of the liquid outlet channel, the contraction section is located between the diffusion section and the valve cavity, the sectional area of the contraction section is gradually decreased, and the sectional area of the diffusion section is gradually increased. The sealing assembly comprises a shell, a sliding piece, a first connecting piece and a communication structure. When the sliding piece slides towards the sealing cavity, the first connecting piece can drive the valve to move from the opening position to the closing position. Therefore, liquid injection can be stopped only through the mechanical structure of the valve body, the valve and the sealing assembly when liquid injection is completed, the cost is reduced, and meanwhile the use stability is improved.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and in particular to a valve mechanism, a liquid injection device, a liquid injection system and a battery manufacturing device. Background Art

[0002] In industrial production, when injecting liquid into a container, a person usually needs to be stationed next to the container for manual control. The valve on the container is opened manually to allow liquid to be injected into the container. When the liquid reaches the set level, the valve for injecting liquid is closed manually to prevent leakage due to excessive injection of liquid.

[0003] In the prior art, a sensor is provided to detect the liquid injection situation, and a controller controls the opening and closing of a valve according to the detected information, thereby realizing automatic closing of the liquid injection.

[0004] However, the cost of using sensors and controllers to control the automatic closing of valves in the prior art is high, and the control stability of sensors is poor. Summary of the invention

[0005] The embodiments of the present invention provide a valve mechanism, a liquid injection device, a liquid injection system and a battery manufacturing device, which solve the problem of high cost and poor stability of automatically closing the liquid injection valve.

[0006] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0007] In a first aspect, the present application provides a valve mechanism, including a valve body, a valve and a closure assembly. The valve body is provided with a valve cavity and a liquid outlet channel connected to the valve cavity, the liquid outlet channel includes a main body section and a fast flow section connected to the main body section, the fast flow section includes a contraction section and a diffusion section, from one end of the liquid outlet channel connected to the valve cavity to the end of the liquid outlet channel away from the valve cavity, the contraction section is located between the diffusion section and the valve cavity, and the cross-sectional area of ​​the contraction section gradually decreases, while the cross-sectional area of ​​the diffusion section gradually increases.

[0008] The valve is arranged in the valve cavity, and the valve can move between a closed position and an open position relative to the valve cavity.

[0009] The closure assembly includes a shell, a sliding member, a first connecting member and a connecting structure. A sliding cavity is formed inside the shell, the sliding member can be slidably accommodated in the sliding cavity, the first connecting member is connected between the sliding member and the valve, the sliding cavity includes a sealing cavity, and the sealing cavity is located on the side of the sliding member away from the first connecting member. A connecting channel is provided in the connecting structure, and the connecting channel includes a first interface, a second interface and a third interface, the first interface is connected to the sealing cavity; the second interface is connected to the diffusion section, or the second interface is connected to a part of the fast flow section between the contraction section and the diffusion section; the third interface is connected to the end of the liquid outlet channel facing away from the valve cavity; when the sliding member slides toward the sealing cavity, the first connecting member can drive the valve to move from the open position to the closed position.

[0010] When electrolyte is injected into the device for storing electrolyte, when the valve is in the open position, the electrolyte can flow into the device to store electrolyte through the liquid outlet channel. When the electrolyte passes through the fast flow section, the flow rate is accelerated, the pressure is reduced, and the pressure is less than the atmospheric pressure. At this time, the air pressure in the device for storing electrolyte is greater than the air pressure in the diffusion section. Under the action of pressure, the connecting channel inhales air from the device for storing electrolyte, and then discharges the air into the diffusion section through the second interface, and then discharged into the device for storing electrolyte through the liquid outlet channel.

[0011] When the electrolyte is submerged in the third interface, the electrolyte blocks the third interface, and the air in the device storing the electrolyte cannot be sucked into the diffusion section. At this time, under the action of pressure, the connecting channel sucks air from the sealed cavity, and then discharges the air into the diffusion section through the second interface, and then discharges the air into the device storing the electrolyte through the liquid outlet channel. At this time, the air in the sealed cavity is sucked away, forming a sealed cavity with negative pressure. The sliding part is located in the sliding cavity, and is affected by the negative pressure of the sealed cavity, so it slides to one side of the sealed cavity. The sliding part drives the valve from the open position to the closed position through the connecting part.

[0012] Therefore, the injection can be stopped when the injection is completed only through the mechanical structure of the valve body, the valve and the closing component, thereby reducing the cost and improving the stability of use.

[0013] In a possible implementation, the plane where the axis of the fast flow section is located is a reference plane, the cross-sectional shape of the side wall of the fast flow section on the reference plane is arc-shaped, and the side wall of the fast flow section is arched toward the axis of the fast flow section in the cross-section of the reference plane.

[0014] In a possible implementation, the valve body is further provided with a liquid inlet channel connected to the valve cavity, and one end of the liquid inlet channel connected to the valve cavity is a liquid inlet end. The valve mechanism also includes a pusher, the pusher is located in the valve cavity and opposite to the liquid inlet end, the direction in which the liquid inlet end points to the pusher is a first direction, the pusher is slidably connected to the valve body along the first direction, and when the pusher slides along the first direction, it can drive the valve to switch from a closed position to an open position.

[0015] In a possible implementation, the valve cavity includes a valve port, the axial direction of the valve port intersects or is perpendicular to the first direction, the liquid outlet channel is connected to the valve port, the valve is arranged in the valve port, and is slidably connected to the valve body along the axial direction of the valve port, the valve body includes a top wall, and the top wall is arranged opposite to the valve port; the valve is provided with an adjustment surface, and the distance between the adjustment surface and the top wall increases along the first direction; the pusher is slidably connected between the top wall and the adjustment surface along the first direction. When the pusher slides along the first direction, it cooperates with the adjustment surface to drive the valve to move toward the top wall, so that the valve switches from a closed position to an open position.

[0016] In a possible embodiment, a pressure channel, a piston and a second connecting piece are also provided in the valve body. The pressure channel is located on the side of the valve cavity opposite to the liquid inlet channel and is connected to the valve cavity. The piston can be slidably accommodated in the pressure channel along the length direction of the pressure channel, and the second connecting piece is connected between the piston and the pushing piece.

[0017] In a possible implementation, the sliding cavity further includes a release cavity, which is located on a side of the sliding member facing away from the sealing cavity, and an anti-tightening member is provided between a surface of the sliding member facing away from the sealing cavity and an inner wall surface of the release cavity.

[0018] In a possible implementation manner, the anti-tightening element is a ball.

[0019] In a possible implementation, a receiving groove is provided on the surface of the sliding member facing away from the sealing cavity, and the ball can roll between the receiving groove and the release cavity. When the ball rolls into the receiving groove, at least part of the ball protrudes from the surface of the sliding member facing away from the sealing cavity.

[0020] In a second aspect, the present application provides a liquid injection device, comprising a liquid storage device, the valve mechanism of the first aspect and a liquid inlet pipe, wherein one end of the liquid inlet pipe is connected to the liquid storage device, and the other end of the liquid inlet pipe is connected to the liquid inlet channel.

[0021] In a third aspect, the present application provides a liquid injection system, comprising a liquid injection device, the liquid injection device of the second aspect described above, and a liquid discharge pipe, wherein one end of the liquid discharge pipe is connected to the liquid injection device, and the other end of the liquid discharge pipe is connected to a liquid outlet channel.

[0022] In a fourth aspect, the present application provides a battery manufacturing device, comprising the liquid injection system of the third aspect.

[0023] It should be noted that the technical effects brought about by any implementation method in the second to fourth aspects can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a valve mechanism provided in one embodiment of the present application;

[0025] Figure 2 for Figure 1 A schematic diagram of an embodiment of a liquid outlet channel in a valve mechanism is provided;

[0026] Figure 3 for Figure 1 A schematic diagram of another embodiment of a liquid outlet channel in a valve mechanism is provided;

[0027] Figure 4 for Figure 1 A schematic diagram of the structure of a closure assembly in a provided valve mechanism;

[0028] Figure 5 for Figure 1 A schematic diagram of the structure inside the valve body of the provided valve mechanism;

[0029] Figure 6 for Figure 1 A schematic diagram of the structure of the pressure channel portion of the valve mechanism provided;

[0030] Figure 7 for Figure 1 A schematic diagram of the structure of the valve mechanism and the injection device is provided.

[0031] Reference numerals:

[0032] 10-valve mechanism;

[0033] 1-valve body; 11-valve cavity; 111-liquid inlet end; 112-valve port; 12-liquid outlet channel; 121-main section; 122-fast flow section; 1221-contraction section; 1222-throat section; 1223-diffusion section; 13-liquid inlet channel; 14-top wall;

[0034] 2-valve; 21-adjusting surface;

[0035] 3-enclosing assembly; 31-housing; 311-sliding chamber; 312-sealing chamber; 313-releasing chamber; 32-sliding member; 321-accommodating groove; 33-first connecting member; 34-connecting structure; 341-first interface; 342-second interface; 343-third interface; 35-anti-tightening member; 36-ball;

[0036] 4- Pushing member;

[0037] 5-pressure channel; 51-piston; 52-second connecting piece. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0039] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, when describing pipelines or channels, the "connected" and "connected" used in this application have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0042] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0043] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of variation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0044] In the industrial production process, liquid transfer is very common, and injecting liquid materials into containers is an important step in the liquid transfer process. Usually, it is necessary for people to be stationed next to the container for manual control to ensure the accuracy and safety of liquid injection. Specifically, the injection valve is opened manually so that the liquid can be smoothly injected into the container. When the liquid reaches the set liquid level, the valve for injecting liquid is closed manually to prevent leakage caused by excessive liquid injection.

[0045] In the related art, a sensor is set to detect the liquid injection situation, and the controller controls the opening and closing of the valve according to the information detected by the sensor, thereby realizing the function of automatic closing of liquid injection. However, the cost of using sensors and controllers to achieve automatic closing in the related art is high, and the stability of sensor control is poor.

[0046] To this end, in order to solve the above-mentioned problems, the present application provides a valve mechanism, a liquid injection device, a liquid injection system and a battery manufacturing device. In order to facilitate the description of the following embodiments, before introducing the embodiments of the present application, some professional terms to be mentioned in the embodiments of the present application are first introduced, specifically:

[0047] Venturi effect: This effect is manifested in that when restricted flow passes through a reduced flow cross-section, the fluid velocity increases, and its flow velocity is inversely proportional to the flow cross-section. According to Bernoulli's principle, the increase in flow velocity is accompanied by a decrease in fluid pressure, which is the common Venturi phenomenon.

[0048] Bernoulli's Principle: In a fluid system, such as air or water flow, when the flow rate increases, the pressure generated by the fluid will decrease, and vice versa. This principle applies not only to ideal fluids, but also to all fluids including air and water.

[0049] Electrolyte: Electrolyte is a medium (with some corrosiveness) used in chemical batteries, electrolytic capacitors, etc., which provides ions for their normal operation and ensures that the chemical reactions occurring during operation are reversible. The electrolyte mentioned in this application refers especially to the electrolyte used in batteries.

[0050] In this application, the transport of liquid will be explained by taking the transport of electrolyte as an example, but this application is not limited to the transport of other items, such as but not limited to water, oil, and other liquids.

[0051] like Figure 1 As shown, Figure 1 A schematic diagram of the structure of a valve mechanism provided in one embodiment of the present application.

[0052] In order to solve the problems in the related art, the present application provides a valve mechanism 10, including a valve body 1, a valve 2 and a closing assembly 3.

[0053] A valve cavity 11 and a liquid outlet channel 12 are provided in the valve body 1 . The liquid outlet channel 12 is communicated with the valve cavity 11 , and the electrolyte can flow out through the liquid outlet channel 12 .

[0054] like Figure 2 As shown, Figure 2 for Figure 1 A schematic diagram of an embodiment of a liquid outlet channel in a valve mechanism is provided.

[0055] Combination Figure 1 and Figure 2 The liquid outlet channel 12 includes a main section 121 and a fast flow section 122 connected to the main section 121. The fast flow section 122 includes a contraction section 1221 and a diffusion section 1223. From one end of the liquid outlet channel 12 connected to the valve cavity 11 to the end of the liquid outlet channel 12 away from the valve cavity 11, the contraction section 1221 is located between the diffusion section 1223 and the valve cavity 11, and the cross-sectional area of ​​the contraction section 1221 gradually decreases, and the cross-sectional area of ​​the diffusion section 1223 gradually increases.

[0056] The electrolyte passes through the liquid outlet channel 12, specifically from one end of the liquid outlet channel 12 connected to the valve cavity 11 to the end of the liquid outlet channel 12 away from the valve cavity 11, and the electrolyte flows from the main section 121 through the contraction section 1221, and then flows through the diffusion section 1223, and finally flows out.

[0057] The diameter of the tube when the electrolyte passes through the liquid outlet channel 12 changes as follows: when the electrolyte flows from the main section 121 through the contraction section 1221, the tube diameter gradually decreases, and the electrolyte is affected by the contraction of the tube in the contraction section 1221. According to the Venturi effect, the flow rate of the electrolyte gradually increases at this time, and according to Bernoulli's principle, as the flow rate of the electrolyte increases, the pressure generated between the electrolytes decreases.

[0058] As the electrolyte flows through the diffusion section 1223, the tube diameter will gradually expand. From the Venturi effect, the flow rate of the electrolyte will gradually decrease in the diffusion section 1223. From Bernoulli's principle, the flow rate of the electrolyte will slow down, the pressure generated between the electrolytes will increase, and gradually return to the pressure in the main section 121.

[0059] It should be noted that, when the electrolyte flows through the diffusion section 1223, although the flow rate of the electrolyte slows down and the pressure generated between the electrolytes increases, the cross-sectional area of ​​the tube diameter of the diffusion section 1223 is still smaller than the cross-sectional area of ​​the main section 121, and the flow rate of the electrolyte in the diffusion section 1223 is still faster than the flow rate of the electrolyte in the main section 121, and the pressure between the electrolytes is still lower than the pressure of the electrolyte flowing through the main section 121.

[0060] Therefore, the flow rate of the electrolyte in the contraction section 1221 and the diffusion section 1223 is greater than or equal to the flow rate of the electrolyte in the main section 121, and the pressure of the electrolyte in the contraction section 1221 and the diffusion section 1223 is less than or equal to the pressure of the electrolyte in the main section 121.

[0061] In a possible embodiment, the fast flow section 122 also includes a throat section 1222, which is connected from one end of the liquid outlet channel 12 to the valve cavity 11 to the end of the liquid outlet channel 12 away from the valve cavity 11, and is respectively composed of a contraction section 1221, a throat section 1222 and a diffusion section 1223, wherein the cross-sectional area of ​​the throat section 1222 is less than or equal to the contraction section 1221 and the diffusion section 1223.

[0062] The electrolyte passes through the throat section 1222, which is the narrowest part of the fast flow section 122. The electrolyte flow rate in the throat section 1222 is the fastest, and the pressure is the lowest at this time. In a possible implementation, the contraction section 1221 includes the contraction section 1221, and the diffusion section 1223 includes the diffusion section 1223.

[0063] Continue to see Figure 2 For example, taking the plane where the axis of the fast flow section 122 is located as the reference plane, the cross-sectional shape of the side wall of the fast flow section 122 on the reference plane is arc-shaped, and the side wall of the fast flow section 122 is arched toward the axis of the fast flow section 122 in the cross-sectional shape of the reference plane.

[0064] Specifically, the cross-sectional shape of the side wall of the contraction section 1221 on the reference plane is an arc convex toward the axis of the fast flow section 122 . The cross-sectional shape of the side wall of the diffusion section 1223 on the reference plane is an arc convex toward the axis of the fast flow section 122 .

[0065] In this way, when the electrolyte passes through the fast flow section 122 , it is affected by the arc-shaped tube wall protruding toward the axis of the fast flow section 122 , and the flow rate can be quickly increased, thereby quickly reducing the pressure.

[0066] like Figure 3 As shown, Figure 3 for Figure 1 A schematic diagram of another embodiment of a liquid outlet channel in a valve mechanism is provided.

[0067] Exemplarily, the plane where the axis of the fast flow section 122 is located is taken as the reference plane, and the cross-sectional shape of the side wall of the fast flow section 122 on the reference plane is a straight line. Specifically, along the direction from the contraction section 1221 to the diffusion section 1223, the distance between the cross-sectional area of ​​the side wall of the contraction section 1221 and the axis of the fast flow section 122 on the reference plane gradually decreases, and the distance between the cross-sectional area of ​​the side wall of the diffusion section 1223 and the axis of the fast flow section 122 on the reference plane gradually increases.

[0068] In this way, when the electrolyte passes through the fast flow section 122, the flow velocity increases at a stable rate and the pressure increases at a relatively stable rate due to the shape of the contraction section 1221, and the flow velocity decreases at a stable rate and the pressure decreases at a relatively stable rate due to the shape of the diffusion section 1223. This can increase the control over the fast flow section 122.

[0069] Continue to see Figure 1 The valve 2 is arranged in the valve chamber 11, and the valve 2 can move between a closed position and an open position relative to the valve chamber 11.

[0070] When the valve 2 is in an open position, the electrolyte can flow into the liquid outlet channel 12 , and when the valve 2 is in a closed position, the electrolyte cannot flow into the liquid outlet channel 12 .

[0071] like Figure 4 As shown, Figure 4 for Figure 1 A schematic diagram of the structure of a closure assembly in a valve mechanism is provided.

[0072] The sealing assembly 3 includes a shell 31 , a sliding member 32 , a first connecting member 33 and a connecting structure 34 .

[0073] A sliding cavity 311 is formed inside the housing 31 , and the sliding member 32 can be slidably accommodated in the sliding cavity 311 .

[0074] The first connecting member 33 is connected between the sliding member 32 and the valve 2 . When the sliding member 32 slides in the sliding cavity 311 , the valve 2 can be driven to switch between an open position and a closed position.

[0075] For example, the sliding member 32 may be made of rubber. Alternatively, the sliding member 32 may be a structure in which rubber wraps metal. When the sliding member 32 slides in the sliding cavity 311 , it may be in close contact with the housing 31 .

[0076] The sliding cavity 311 further includes a sealing cavity 312 . The sealing cavity 312 is located on a side of the sliding member 32 away from the first connecting member 33 .

[0077] The communication structure 34 is provided with a communication channel, and the communication channel includes a first interface 341, a second interface 342 and a third interface 343. The first interface 341 is connected to the sealing cavity 312; the second interface 342 is connected to the diffuser section 1223, or the second interface 342 is connected to the part of the fast flow section 122 between the contraction section 1221 and the diffuser section 1223. For example, the second interface 342 is connected to the throat section 1222 (see Figure 2 ); the third interface 343 is connected to the end of the liquid outlet channel 12 facing away from the valve chamber 11;

[0078] Exemplarily, the communication structure 34 is a three-way pipe, and the three-way pipe includes a first interface 341 , a second interface 342 , and a third interface 343 .

[0079] When the sliding member 32 slides toward the sealing cavity 312, the first connecting member 33 can drive the valve 2 (see Figure 1 ) moves from an open position to a closed position.

[0080] Combination Figure 1 and Figure 4 When electrolyte is injected into the device for storing electrolyte, when the valve 2 is in the open position, the electrolyte can flow into the device to store electrolyte through the liquid outlet channel 12. When the electrolyte passes through the fast flow section 122, the flow rate is accelerated, the pressure is reduced, and the pressure is less than the atmospheric pressure. At this time, the air pressure in the device for storing electrolyte is greater than the air pressure in the diffusion section 1223. Under the action of pressure, the connecting channel inhales air from the device for storing electrolyte, and then discharges the air into the diffusion section 1223 through the second interface 342, and then discharges the air into the device for storing electrolyte through the liquid outlet channel 12.

[0081] When the electrolyte is submerged in the third interface 343, the electrolyte blocks the third interface 343, and the air in the device storing the electrolyte cannot be sucked into the diffuser section 1223. At this time, under the action of pressure, the connecting channel sucks air from the sealed cavity 312, and then discharges the air into the diffuser section 1223 through the second interface 342, and then discharges the air into the device storing the electrolyte through the liquid outlet channel 12. At this time, the air in the sealed cavity 312 is sucked away, forming a negative pressure sealed cavity 312. The sliding member 32 is located in the sliding cavity 311, and is affected by the negative pressure of the sealed cavity 312, so that it slides to one side of the sealed cavity 312. The sliding member 32 drives the valve 2 to move from the open position to the closed position through the first connecting member 33.

[0082] Therefore, the injection can be stopped when the injection is completed only through the mechanical structure of the valve body 1, the valve 2 and the closing component 3, thereby reducing the cost and improving the stability of use.

[0083] Before introducing the embodiments of the present application in detail, the application scenarios of the embodiments of the present application are first introduced.

[0084] During the battery production process, electrolyte needs to be injected into each battery. However, placing the storage bin for storing electrolyte on the battery production line not only takes up space in the battery production industrial line, but also has high risks. Therefore, the storage bin for storing electrolyte is separately set outside the industrial line for producing batteries, and a storage tank with a smaller capacity is set on the industrial line for producing batteries for daily production, and then the electrolyte is replenished from the electrolyte storage bin outside the battery production industrial line to the storage tank with a smaller capacity through the valve mechanism 10.

[0085] Continue to see Figure 4 In a possible embodiment, the sliding cavity 311 further includes a release cavity 313, and the release cavity 313 is located on the side of the sliding member 32 facing away from the sealing cavity 312. When the sliding member 32 cooperates with the release cavity 313, the valve 2 (see Figure 2 ) is fixed in the open position, so that the valve 2 can be kept in the open position for a long time, reducing the possibility of the valve 2 being closed by mistake.

[0086] At the same time, the release cavity 313 allows the sliding member 32 to have a larger sliding amount when sliding in the sliding cavity 311, so that the sliding member 32 can slide smoothly in the direction away from the sealing cavity 312, thereby making the valve 2 smoothly switch from the closed position to the open position.

[0087] In a possible implementation, the release chamber 313 is connected to the air outside the device, that is, the air pressure in the release chamber 313 is the atmospheric pressure. During the injection process, the air pressure in the release chamber 313 is the same as the air pressure in the sealing chamber 312. When the sliding member 32 slides toward the sealing chamber 312, the chamber pressure of the sealing chamber 312 decreases. At this time, the air pressure in the release chamber 313 is still the same as the atmospheric pressure and is greater than the air pressure in the sealing chamber 312, which facilitates the sliding member 32 to slide toward the release chamber 313.

[0088] In a possible implementation, an anti-tightening member 35 is disposed between the surface of the sliding member 32 facing away from the sealing cavity 312 and the inner wall surface of the release cavity 313. When the sliding member 32 is engaged with the release cavity 313, the anti-tightening member 35 can prevent the sliding member 32 from engaging too tightly with the release cavity 313 to generate negative pressure, making it difficult for the sliding member 32 to slide toward the sealing cavity 312.

[0089] Exemplarily, the surface of the sliding member 32 facing away from the sealing cavity 312 protrudes toward the inner wall surface of the release cavity 313 to form an anti-tightening member 35 .

[0090] Exemplarily, the inner wall of the release cavity 313 protrudes toward the surface of the sliding member 32 facing away from the sealing cavity 312 to form an anti-tightening member 35 .

[0091] Exemplarily, the anti-tightening member 35 is a ball 36 , and the ball 36 is located between the inner wall surface of the release cavity 313 and the surface of the sliding member 32 facing away from the sealing cavity 312 .

[0092] In a possible implementation, a receiving groove 321 is provided on the surface of the sliding member 32 facing away from the sealing cavity 312, and the ball 36 can roll between the receiving groove 321 and the release cavity 313. When the ball 36 rolls into the receiving groove 321, at least a portion of the ball 36 protrudes from the surface of the sliding member 32 facing away from the sealing cavity 312. This can prevent the sliding member 32 from fitting too tightly with the sealing cavity and restricting the sliding cavity 311 from sliding toward the sealing cavity 312.

[0093] When the sliding member 32 is located at a side close to the sealing cavity 312, the ball 36 is released from the receiving groove 321 and falls into the release cavity 313, generating a sound to remind the surrounding personnel that the valve 2 (see Figure 1 ) is switched from the open position to the closed position, and the injection of electrolyte is stopped, reflecting that the electrolyte replenishment is complete.

[0094] For example, the material of the ball 36 may be at least one of metal and glass.

[0095] Continue to see Figure 1 In a possible implementation, a liquid inlet channel 13 communicating with the valve cavity 11 is further provided in the valve body 1 , and one end of the liquid inlet channel 13 communicating with the valve cavity 11 is a liquid inlet end 111 . The liquid inlet channel 13 is used to introduce electrolyte into the valve cavity 11 .

[0096] like Figure 5 As shown, Figure 5 for Figure 1 A schematic diagram of the structure inside the valve body in the valve mechanism is provided.

[0097] Combination Figure 1 and Figure 5 The valve mechanism 10 also includes a push member 4, which is located in the valve cavity 11 and opposite to the liquid inlet end 111. The direction in which the liquid inlet end 111 points to the push member 4 is a first direction. The push member 4 is slidably connected to the valve body 1 along the first direction, and when the push member 4 slides along the first direction, it can drive the valve 2 to switch from a closed position to an open position.

[0098] To the liquid inlet channel 13 (participate in Figure 1 ), the electrolyte flows along the first direction X, generating a thrust on the push member 4, thereby driving the push member 4 to slide along the first direction X, thereby driving the valve 2 to switch from the closed position to the open position.

[0099] Thus, the valve 2 can be opened only by filling the valve mechanism 10 with electrolyte, and then the electrolyte is injected through the valve mechanism 10. When the electrolyte injection reaches a set value, the valve can be automatically closed.

[0100] In summary, in the process of injecting electrolyte, no manual control is required to complete the automatic injection of electrolyte and stop the automatic injection of electrolyte, saving labor costs. Moreover, the control is completed only through the mechanical structure, which is more stable and has the advantages of long service life compared with the sensor control used in the related technology.

[0101] It should be noted that the pushing member 4 can slide along the first direction X, and can also slide along the opposite direction of the first direction X.

[0102] In a possible implementation, the valve cavity 11 includes a valve port 112, the axial direction Y of the valve port 112 intersects or is perpendicular to the first direction X, and the liquid outlet channel 12 (see Figure 1 ) is connected to the valve port 112, and the valve 2 is arranged in the valve port 112.

[0103] When the valve 2 is in the closed position, it is located in the valve port 112 and fits tightly to the valve port 112. When the valve 2 is in the open position, the valve 2 and the valve port 112 are disengaged. At this time, there is a gap between the valve 2 and the valve port 112, and the electrolyte can flow through the gap.

[0104] Exemplarily, the gap between the valve 2 and the valve port 112 can be adjusted by the length of the pusher 4 .

[0105] The valve 2 is slidably connected to the valve body 1 along the axial direction Y of the valve port 112 . The valve body 1 includes a top wall 14 . The top wall 14 is arranged opposite to the valve port 112 .

[0106] In a possible implementation manner, along the first direction X, the distance between the top wall 14 and the valve port 112 increases, and the pusher 4 is slidably connected between the top wall 14 and the valve 2 along the first direction X.

[0107] In this way, one end of the pusher 4 is slidably connected to the top wall 14, and the other end is slidably connected to the valve 2, and the length of the pusher 4 is fixed. Limited by the length of the pusher 4, when the pusher 4 slides along the first direction X, the pusher 4 drives the valve 2 to move toward the top wall 14, and then away from the valve port 112, so as to switch the valve 2 from the closed position to the open position.

[0108] In a possible implementation, the top wall 14 and the valve port 112 are arranged relatively parallel. The valve 2 is provided with an adjustment surface 21, and the distance between the adjustment surface 21 and the top wall 14 increases along the first direction X. The pusher 4 is slidably connected between the top wall 14 and the adjustment surface 21 along the first direction X. When the pusher 4 slides along the first direction X, it cooperates with the adjustment surface 21 to drive the valve 2 to move toward the top wall 14, so that the valve 2 is switched from the closed position to the open position.

[0109] In a possible implementation, the valve cavity 11 includes a limiting portion, which is arranged opposite to the liquid inlet end 111, and the valve 2 is slidably connected to the limiting portion. In the process of switching the valve 2 from the closed position to the open position, the limiting member limits the valve 2 from sliding along the first direction X under the influence of the pusher 4, and allows the valve 2 to move only along the axial direction of the valve port 112, thereby increasing the gap between the valve 2 and the valve port 112 and promoting the passage of the electrolyte.

[0110] like Figure 6 As shown, Figure 6 for Figure 1A schematic diagram of the structure of the pressure channel portion of the valve mechanism is provided.

[0111] In a possible embodiment, a pressure channel 5, a piston 51 and a second connecting member 52 are further provided in the valve body 1. The pressure channel 5 is located on the side of the valve cavity 11 facing away from the liquid inlet channel 13. One end of the pressure channel 5 is connected to the valve cavity 11, and the other end of the pressure channel 5 is connected to the storage device into which the electrolyte is injected.

[0112] The piston 51 is slidably accommodated in the pressure channel 5 along the length direction of the pressure channel 5 , and the second connecting member 52 is connected between the piston 51 and the pushing member 4 .

[0113] The piston 51 is located in the pressure channel 5 on one side close to the valve cavity 11 and on the other side close to the storage device, where electrolyte exists. When the electrolyte level in the storage device drops, the pressure on the side of the piston 51 close to the storage device drops, and the pressure on the side of the piston 51 close to the valve cavity 11 is greater than the pressure on the side close to the storage device. The piston 51 slides away from the valve cavity 11, thereby driving the pusher 4 away from the liquid inlet channel 13. The pusher 4 moves away from the liquid inlet channel 13, driving the valve 2 to switch from the closed position to the open position.

[0114] When the electrolyte level in the storage device rises, the pressure on the side of the piston 51 close to the storage device rises, and the pressure on the side of the piston 51 close to the valve chamber 11 gradually becomes smaller than the pressure on the side close to the storage device, and the piston 51 slides toward the valve chamber 11, thereby exerting a force to move the pusher 4 toward the liquid inlet channel 13, thereby assisting the valve 2 to move from the open position to the closed position.

[0115] In summary, the pressure channel 5, the piston 51 and the second connecting member 52 can assist the valve 2 to move from the open position to the closed position.

[0116] It should be noted that the first connecting member 33 (see Figure 4 ) and a second connecting member 52 (see Figure 6 ) only plays a role in connecting transmission, and the first connecting member 33 and the second connecting member 52 are not specifically limited here.

[0117] The present application also provides a liquid injection device, including a liquid storage device, a valve mechanism 10 and a liquid inlet pipe, one end of the liquid inlet pipe is connected to the liquid storage device, and the other end of the liquid inlet pipe is connected to the liquid inlet channel 13.

[0118] Exemplary liquid storage devices include, but are not limited to, liquid storage tanks, liquid storage tanks, and other devices capable of storing electrolyte.

[0119] like Figure 7 As shown, Figure 7 for Figure 1The present application provides a liquid injection system, including a liquid injection device, the above-mentioned liquid injection device and a liquid discharge pipe, one end of the liquid discharge pipe is connected to the liquid injection device, and the other end of the liquid discharge pipe is connected to the liquid outlet channel 12.

[0120] Exemplary injection devices include, but are not limited to, liquid storage tanks, liquid storage bins, and other devices capable of storing electrolyte.

[0121] The present application also provides a battery manufacturing device, including the above-mentioned liquid injection system.

[0122] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the present application for which protection is claimed, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprise" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0123] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0124] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A valve mechanism (10), characterized in that: include: A valve body (1), wherein a valve cavity (11) and a liquid outlet channel (12) connected to the valve cavity (11) are provided in the valve body (1), wherein the liquid outlet channel (12) comprises a main body section (121) and a fast flow section (122) connected to the main body section (121), wherein the fast flow section (122) comprises a contraction section (1221) and a diffusion section (1223); from one end of the liquid outlet channel (12) connected to the valve cavity (11) to the end of the liquid outlet channel (12) away from the valve cavity (11), the contraction section (1221) is located between the diffusion section (1223) and the valve cavity (11), and the cross-sectional area of ​​the contraction section (1221) gradually decreases, while the cross-sectional area of ​​the diffusion section (1223) gradually increases; a valve (2), the valve (2) being arranged in the valve chamber (11), the valve (2) being movable relative to the valve chamber (11) between a closed position and an open position; A closure assembly (3), the closure assembly (3) comprising: A housing (31), wherein a sliding cavity (311) is formed inside the housing (31); A sliding member (32), the sliding member (32) being slidably accommodated in the sliding cavity (311); a first connecting member (33), the first connecting member (33) being connected between the sliding member (32) and the valve (2), the sliding cavity (311) comprising a sealing cavity (312), the sealing cavity (312) being located on a side of the sliding member (32) facing away from the first connecting member (33); A communication structure (34), wherein a communication channel is provided in the communication structure (34), and the communication channel comprises a first interface (341), a second interface (342) and a third interface (343), wherein the first interface (341) is connected to the sealing cavity (312); the second interface (342) is connected to the diffusion section (1223), or the second interface (342) is connected to a portion of the fast flow section (122) between the contraction section (1221) and the diffusion section (1223); and the third interface (343) is connected to an end of the liquid outlet channel (12) that is opposite to the valve cavity (11); When the sliding member (32) slides toward the sealing cavity (312), the first connecting member (33) can drive the valve (2) to move from the open position to the closed position.

2. The valve mechanism (10) according to claim 1, characterized in that: The plane on which the axis of the fast flow section (122) is located is a reference plane, the cross-sectional shape of the side wall of the fast flow section (122) on the reference plane is arc-shaped, and the side wall of the fast flow section (122) is arched toward the axis of the fast flow section (122) in the cross-section of the reference plane.

3. The valve mechanism (10) according to claim 1, characterized in that: The valve body (1) is further provided with a liquid inlet channel (13) in communication with the valve cavity (11); one end of the liquid inlet channel (13) in communication with the valve cavity (11) is a liquid inlet end (111); The valve mechanism (10) further comprises a push member (4), wherein the push member (4) is located in the valve cavity (11) and is opposite to the liquid inlet end (111), and the direction in which the liquid inlet end (111) points to the push member (4) is a first direction, and the push member (4) is connected to the valve body (1) by sliding along the first direction, and when the push member (4) slides along the first direction, it can drive the valve (2) to switch from the closed position to the open position.

4. The valve mechanism (10) according to claim 3, characterized in that: The valve cavity (11) comprises a valve port (112), the axial direction of the valve port (112) intersects or is perpendicular to the first direction, the liquid outlet channel (12) is connected to the valve port (112), the valve (2) is arranged in the valve port (112), and is slidably connected to the valve body (1) along the axial direction of the valve port (112); The valve body (1) comprises a top wall (14), and the top wall (14) is arranged opposite to the valve port (112); The valve (2) is provided with an adjusting surface (21), and along the first direction, the distance between the adjusting surface (21) and the top wall (14) increases; the pushing member (4) is slidably connected between the top wall (14) and the adjusting surface (21) along the first direction; When the pushing member (4) slides along the first direction, it cooperates with the regulating surface (21) to drive the valve (2) to move toward the top wall (14), so that the valve (2) switches from the closed position to the open position.

5. The valve mechanism (10) according to claim 4, characterized in that: The valve body (1) is also provided with: a pressure channel (5), the pressure channel (5) being located on a side of the valve chamber (11) facing away from the liquid inlet channel (13) and being in communication with the valve chamber (11); a piston (51), the piston (51) being slidably accommodated in the pressure channel (5) along the length direction of the pressure channel (5); A second connecting member (52), the second connecting member (52) is connected between the piston (51) and the pushing member (4).

6. The valve mechanism (10) according to claim 1, characterized in that: The sliding cavity (311) further comprises a release cavity (313), and the release cavity (313) is located on a side of the sliding member (32) facing away from the sealing cavity (312); An anti-tightening member (35) is provided between the surface of the sliding member (32) facing away from the sealing cavity (312) and the inner wall surface of the release cavity (313).

7. The valve mechanism (10) according to claim 6, characterized in that: The anti-tightening member (35) is a ball (36).

8. The valve mechanism (10) according to claim 7, characterized in that: A receiving groove (321) is provided on the surface of the sliding member (32) facing away from the sealing cavity (312); the ball (36) can roll between the receiving groove (321) and the release cavity (313); when the ball (36) rolls into the receiving groove (321), at least part of the ball (36) protrudes from the surface of the sliding member (32) facing away from the sealing cavity (312).

9. A liquid injection device, characterized in that: include: liquid storage device; A valve mechanism (10) as claimed in any one of claims 3 to 8; A liquid inlet pipe, one end of which is connected to the liquid storage device, and the other end of which is connected to the liquid inlet channel (13).

10. A liquid injection system, characterized in that: include: liquid injection device; The liquid injection device according to claim 9; A liquid discharge pipe, one end of which is connected to the liquid injection device, and the other end of which is connected to the liquid outlet channel (12).

11. A battery manufacturing device, characterized in that: Comprising the injection system as described in claim 10.

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