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

Abstract

The application discloses a valve mechanism, a liquid injection device, a liquid injection system and a battery manufacturing equipment, relates to the technical field of valves, and solves the problems of high cost and poor stability of automatically closing a liquid injection valve. The valve mechanism comprises a valve body, a valve and a sealing assembly. The valve body is internally provided with a liquid outlet channel. A fast flow section comprises a contraction section and a diffusion section. One end of the liquid outlet channel connected with 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. The cross-sectional area of the contraction section gradually decreases, and the cross-sectional area of the diffusion section gradually increases. The sealing assembly comprises a shell, a sliding piece, a first connecting piece and a communication structure. When the sliding piece slides to the sealing cavity, the first connecting piece can drive the valve to move from the open position to the closed position. Thus, the liquid injection can be stopped by the mechanical structure of the valve body, the valve and the sealing assembly when the liquid injection is completed. The cost is reduced, and the use stability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a valve mechanism, a liquid injection device, a liquid injection system and a battery manufacturing equipment. BACKGROUND

[0002] In the industrial production process, when liquid is injected into a container, it is usually necessary to manually control the injection by a person standing beside the container. By manually opening the valve on the container, the liquid can be injected into the container. When the liquid reaches the set liquid level, the valve for injecting the liquid is manually closed to prevent the liquid from being injected in excess and causing leakage.

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

[0004] However, the use of sensors and controllers to control the automatic closing of the valve in the prior art is high in cost and poor in stability. SUMMARY

[0005] Embodiments of the present application provide a valve mechanism, a liquid injection device, a liquid injection system and a battery manufacturing equipment, which solve the problems of high cost and poor stability of automatic closing of the liquid injection valve.

[0006] To achieve the above-mentioned purposes, embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, the present application provides a valve mechanism, comprising a valve body, a valve and a sealing assembly. The valve body is provided with a valve cavity and a liquid outlet channel communicating with the valve cavity. The liquid outlet channel comprises a main body section and a fast flow section connected to the main body section. The fast flow section comprises a contraction section and a diffusion section. From the end of the liquid outlet channel communicating with 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, and the cross-sectional area of the diffusion section gradually increases.

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

[0009] The closing assembly comprises a housing, a sliding member, a first connecting member and a communication structure. The housing has a sliding cavity formed therein, the sliding member is slidably accommodated in the sliding cavity, the first connecting member is connected between the sliding member and the valve, and the sliding cavity comprises a sealing cavity located on a side of the sliding member away from the first connecting member. The communication structure is internally provided with a communication channel comprising a first interface, a second interface and a third interface, the first interface is in communication with the sealing cavity, the second interface is in communication with the diffusion section, or the second interface is in communication with a part of the fast-flow section between the converging section and the diffusion section, and the third interface is in communication with an end of the liquid outlet channel opposite to the valve cavity. When the sliding member slides towards 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, the valve is in the open position, the electrolyte can flow into the device for storing electrolyte through the liquid outlet channel, the flow rate of the electrolyte is accelerated and the pressure is reduced when the electrolyte passes through the fast-flow section, 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 the pressure, the communication channel sucks in air from the device for storing electrolyte, and then discharges the air into the diffusion section through the second interface, and then discharges the air into the device for storing electrolyte through the liquid outlet channel.

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

[0012] Thus, only the mechanical structure of the valve body, the valve and the closing assembly can stop the injection when the injection is completed, the cost is reduced, and the use stability is improved.

[0013] In a possible implementation, the plane in which 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 in the reference plane is arc-shaped, and the cross-section of the side wall of the fast-flow section in the reference plane is arched towards the axis of the fast-flow section.

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

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

[0016] In a possible implementation, the valve body further comprises a pressure channel, a piston and a second connecting member, the pressure channel is located on the side of the valve cavity opposite to the liquid inlet channel and is in communication with the valve cavity, the piston is slidably arranged in the pressure channel along the length direction of the pressure channel, and the second connecting member is connected between the piston and the pushing member.

[0017] In a possible implementation, the sliding cavity further comprises a release cavity, the release cavity is located on the side of the sliding member opposite to the sealing cavity, and a tightness prevention member is arranged between the surface of the sliding member opposite to the sealing cavity and the inner wall surface of the release cavity.

[0018] In a possible implementation, the tightness prevention member is a ball.

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

[0020] In a second aspect, the application provides a liquid injection device, comprising a liquid storage device, the valve mechanism of the first aspect and a liquid inlet pipe, one end of the liquid inlet pipe being in communication with the liquid storage device, and the other end of the liquid inlet pipe being in communication with the liquid inlet channel.

[0021] In a third aspect, the application provides a liquid injection system, comprising the liquid injection device, the liquid injection device of the second aspect and a liquid outlet pipe, one end of the liquid outlet pipe being in communication with the liquid injection device, and the other end of the liquid outlet pipe being in communication with the liquid outlet channel.

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

[0023] It should be noted that the technical effects brought by any one of the implementation manners of the second aspect to the fourth aspect can be referred to the technical effects brought by the corresponding implementation manners of the first aspect, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A structural schematic diagram of the valve mechanism provided by an embodiment of the application is shown in the figure;

[0025] Figure 2 An embodiment of the outlet passage in the valve mechanism is provided. Figure 1 An embodiment of the outlet passage in the valve mechanism is provided.

[0026] Figure 3 An embodiment of the outlet passage in the valve mechanism is provided. Figure 1 An embodiment of the outlet passage in the valve mechanism is provided.

[0027] Figure 4 An embodiment of the outlet passage in the valve mechanism is provided. Figure 1 An embodiment of the outlet passage in the valve mechanism is provided.

[0028] Figure 5 An embodiment of the outlet passage in the valve mechanism is provided. Figure 1 An embodiment of the outlet passage in the valve mechanism is provided.

[0029] Figure 6 An embodiment of the outlet passage in the valve mechanism is provided. Figure 1 An embodiment of the outlet passage in the valve mechanism is provided.

[0030] Figure 7 An embodiment of the outlet passage in the valve mechanism is provided. Figure 1 An embodiment of the outlet passage in the valve mechanism is provided.

[0031] Reference signs:

[0032] 10 - valve mechanism;

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

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

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

[0036] 4 - push member;

[0037] 5 - pressure passage; 51 - piston; 52 - second connecting member. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0039] In the description of the application, it should be understood that the orientation or positional relationship indicated by terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0040] The terms "first", "second", "third", etc. are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0041] In the description of the application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances. In addition, when describing pipelines or channels, the "connection" used in the application has the meaning of conducting. The specific meaning needs to be understood in combination with the context.

[0042] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design presented as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Rather, the use of "exemplary" or "for example" is intended to present concepts in a concrete manner. The use of "exemplary" or "for example" does not in any way limit the scope of the application.

[0043] As used herein, "about", "approximately", or "around" includes the stated value and the average value within an acceptable range of deviation from the specific value, wherein the acceptable range of deviation is determined by considering the measurement being discussed and the error related to the measurement of the specific quantity (i.e., the limitation of the measurement system) by those of ordinary skill in the art.

[0044] In the industrial production process, liquid transfer is very common, and injecting liquid material into a container is an important step in the liquid transfer process. Usually, a person needs to be stationed next to the container for manual control to ensure the accuracy and safety of the liquid injection. Specifically, the injection valve is manually opened so that the liquid can be smoothly injected into the container, and when the liquid reaches the set liquid level, the valve is manually closed to prevent the liquid from being injected in excess and causing leakage.

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

[0046] To solve the above problems, the present application provides a valve mechanism, a liquid injection device, a liquid injection system and a battery manufacturing equipment. In order to facilitate the description of each embodiment below, before introducing the embodiments of the present application, some professional terms to be mentioned in the embodiments of the present application will be introduced first. Specifically:

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

[0048] Bernoulli's law: In a fluid system, such as air flow 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 certain 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 present application refers to electrolyte, especially the electrolyte used in batteries.

[0050] In the present application, the transfer of liquid will be illustrated by the transfer of electrolyte, but the present application does not limit the transfer of other objects, such as but not limited to water, oil, other liquids.

[0051] As shown in Figure 1 The structural schematic diagram of the valve mechanism provided by an embodiment of the present application. Figure 1 The structural schematic diagram of the valve mechanism provided by an embodiment of the present application.

[0052] To solve the problems in the related art, the present application provides a valve mechanism 10, which comprises a valve body 1, a valve 2 and a sealing assembly 3.

[0053] The valve body 1 is provided with a valve cavity 11 and a liquid outlet channel 12, 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] As shown in Figure 2 , Figure 2 For Figure 1 An embodiment of the liquid outlet channel in the valve mechanism is shown in the figure.

[0055] In combination Figure 1 And Figure 2 , the liquid outlet channel 12 includes a main body section 121 and a fast-flow section 122 connected to the main body section 121, the fast-flow section 122 includes a contraction section 1221 and a diffusion section 1223, from the end of the liquid outlet channel 12 communicated with 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 flows through the liquid outlet channel 12, specifically from the end of the liquid outlet channel 12 communicated with the valve cavity 11 to the end of the liquid outlet channel 12 away from the valve cavity 11, the electrolyte flows through the contraction section 1221 from the main body section 121, then flows through the diffusion section 1223, and finally flows out.

[0057] The pipe diameter of the electrolyte flowing through the liquid outlet channel 12 changes as follows: when the electrolyte flows through the contraction section 1221 from the main body section 121, the pipe diameter gradually decreases, and the electrolyte in the contraction section 1221 is subjected to the contraction effect of the pipe, according to the Venturi effect, the flow rate of the electrolyte gradually increases at this time, and according to Bernoulli's law, the flow rate of the electrolyte increases, and the pressure generated between the electrolytes becomes smaller.

[0058] During the process of the electrolyte flowing through the diffusion section 1223, the pipe diameter gradually expands, according to the Venturi effect, the flow rate of the electrolyte gradually decreases in the diffusion section 1223, according to Bernoulli's law, the flow rate of the electrolyte slows down, and the pressure generated between the electrolytes becomes larger and gradually recovers to the pressure in the main body section 121.

[0059] It should be noted that during the process of the electrolyte flowing through the diffusion section 1223, although the flow rate of the electrolyte slows down and the pressure generated between the electrolytes becomes larger, the cross-sectional area of the pipe diameter of the diffusion section 1223 is still smaller than that of the main body section 121 at this time, the flow rate of the electrolyte in the diffusion section 1223 is still faster than that in the main body section 121, and the pressure between the electrolytes is still smaller than that of the electrolyte flowing through the main body section 121.

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

[0061] In one possible implementation, the fast flow section 122 further includes a throat section 1222, which extends from one end of the outlet channel 12 that connects to the valve chamber 11 to the end of the outlet channel 12 that is away from the valve chamber 11. The throat section 1222 and the diffuser section 1223 are sequentially connected. The cross-sectional area of ​​the throat section 1222 is less than or equal to that of the throat section 1221 and the diffuser section 1223.

[0062] The electrolyte flows through the throat section 1222, which is the narrowest part of the fast-flow section 122, where the electrolyte flow rate is fastest and the pressure is lowest. In one possible embodiment, the contraction section 1221 includes the contraction section 1221, and the diffusion section 1223 includes the diffusion section 1223.

[0063] See also 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 sidewall of the fast flow section 122 on the reference plane is arc-shaped, and the cross-section of the sidewall of the fast flow section 122 on the reference plane arches towards the axis of the fast flow section 122.

[0064] Specifically, the sidewall of the contraction section 1221 has an arc-shaped cross-section protruding towards the axis of the fast flow section 122 in the reference plane. The sidewall of the diffuser section 1223 also has an arc-shaped cross-section protruding towards the axis of the fast flow section 122 in the reference plane.

[0065] Thus, when the electrolyte passes through the fast flow section 122, it is affected by the arc-shaped tube wall protruding towards the axis of the fast flow section 122, which can rapidly increase the flow rate and thus rapidly reduce the pressure.

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

[0067] For example, taking the plane containing the axis of the fast flow section 122 as a reference plane, the cross-sectional shape of the sidewall of the fast flow section 122 on the reference plane is linear. Specifically, along the direction from the contraction section 1221 to the diffusion section 1223, the distance between the cross-section of the sidewall of the contraction section 1221 on the reference plane and the axis of the fast flow section 122 gradually decreases, while the distance between the cross-section of the sidewall of the diffusion section 1223 on the reference plane and the axis of the fast flow section 122 gradually increases.

[0068] Thus, when the electrolyte passes through the fast-flow section 122, the rate of increase in flow velocity is stable due to the shape of the contraction section 1221, and the rate of increase in pressure is also relatively stable. Conversely, the rate of decrease in flow velocity is stable due to the shape of the diffusion section 1223, and the rate of decrease in pressure is also relatively stable. This allows for greater control over the fast-flow section 122.

[0069] See also Figure 1 Valve 2 is disposed in valve chamber 11, and valve 2 can move between closed and open positions relative to valve chamber 11.

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

[0071] like Figure 4 As shown, Figure 4 for Figure 1 A schematic diagram of the sealing component in the provided valve mechanism.

[0072] The enclosed component 3 includes a housing 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, it can drive the valve 2 to switch between the open position and the closed position.

[0075] For example, the slider 32 may be made of rubber. Alternatively, the slider 32 may be a structure in which rubber is wrapped around metal. When the slider 32 slides in the sliding cavity 311, it can make close contact with the housing 31.

[0076] The sliding cavity 311 also includes a sealing cavity 312, which is located on the side of the sliding member 32 opposite to the first connecting member 33.

[0077] The connecting structure 34 is provided with a connecting channel, which 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 a portion of the fast-flow section 122 between the constriction 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 one end of the liquid outlet channel 12 opposite to the valve chamber 11.

[0078] Exemplarily, the communication structure 34 is a tee pipe, which comprises a first interface 341, a second interface 342 and a third interface 343.

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

[0080] In combination Figure 1 and Figure 4 , when electrolyte is injected into the device for storing electrolyte, the valve 2 is in the open position, the electrolyte can flow into the device for storing electrolyte through the liquid outlet channel 12, when the electrolyte passes through the fast-flow section 122, the flow rate is accelerated and 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 the pressure, the communication channel sucks in 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 reaches the third interface 343, the electrolyte blocks the third interface 343, and the air in the device for storing electrolyte cannot be sucked into the diffusion section 1223, at this time, under the action of the pressure, the communication channel sucks in air from the sealing cavity 312, 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. At this time, the air in the sealing cavity 312 is sucked away, forming a negative pressure sealing cavity 312, the sliding member 32 is located in the sliding cavity 311, and is driven to slide to the side of the sealing cavity 312 under the action of the negative pressure of the sealing cavity 312, and 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, only the mechanical structure of the valve body 1, the valve 2 and the closing assembly 3 can stop the injection of electrolyte when the injection is completed, thereby reducing the cost and improving the use stability.

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

[0084] In the process of battery production, electrolyte needs to be injected into each battery. However, placing the storage bin for storing electrolyte on the production line of the battery not only occupies the space of the production line of the battery, but also has a high risk. Therefore, the storage bin for storing electrolyte is separately arranged outside the production line of the battery, a storage tank with a small capacity is arranged on the production line of the battery, and is used for daily production, and the valve mechanism 10 is used to supplement the electrolyte from the storage bin for storing electrolyte outside the production line of the battery to the storage tank with a small capacity.

[0085] Continuing to refer toFigure 4 In a possible implementation, the sliding cavity 311 further comprises a releasing cavity 313, which is located on the side of the sliding member 32 opposite to the sealing cavity 312. When the sliding member 32 cooperates with the releasing cavity 313, the valve 2 (see Figure 2 ) can be fixed in the open position, which facilitates the valve 2 to be in the open position for a long time and reduces the situation that the valve 2 is closed by mistake.

[0086] Meanwhile, the releasing cavity 313 enables the sliding member 32 to slide a larger distance in the sliding cavity 311, which facilitates the sliding member 32 to slide smoothly in the direction away from the sealing cavity 312, thereby facilitating the valve 2 to switch from the closed position to the open position smoothly.

[0087] In a possible implementation, the releasing cavity 313 is in communication with the air outside the device, i.e., the air pressure in the releasing cavity 313 is the atmospheric pressure. During the liquid injection process, the air pressure in the releasing cavity 313 is the same as that in the sealing cavity 312. When the sliding member 32 slides towards the sealing cavity 312, the air pressure in the sealing cavity 312 decreases. At this time, the air pressure in the releasing cavity 313 is still the same as the atmospheric pressure, which is greater than the air pressure in the sealing cavity 312, thereby facilitating the sliding member 32 to slide towards the releasing cavity 313.

[0088] In a possible implementation, a tight-preventing member 35 is arranged between the surface of the sliding member 32 opposite to the sealing cavity 312 and the inner wall surface of the releasing cavity 313. When the sliding member 32 cooperates with the releasing cavity 313, the tight-preventing member 35 prevents the sliding member 32 from cooperating too tightly with the releasing cavity 313 to generate negative pressure, which is not conducive to the sliding member 32 to slide towards the sealing cavity 312.

[0089] For example, the surface of the sliding member 32 opposite to the sealing cavity 312 is convex to the inner wall surface of the releasing cavity 313 to form the tight-preventing member 35.

[0090] For example, the inner wall surface of the releasing cavity 313 is convex to the surface of the sliding member 32 opposite to the sealing cavity 312 to form the tight-preventing member 35.

[0091] For example, the tight-preventing member 35 is a ball 36, which is located between the inner wall surface of the releasing cavity 313 and the surface of the sliding member 32 opposite to the sealing cavity 312.

[0092] In a possible implementation, the surface of the sliding member 32 opposite to the sealing cavity 312 is provided with a receiving groove 321, and the ball 36 can roll between the receiving groove 321 and the releasing cavity 313. When the ball 36 rolls into the receiving groove 321, at least part of the ball 36 is convex to the surface of the sliding member 32 opposite to the sealing cavity 312. In this way, the sliding member 32 can be prevented from cooperating too tightly with the sealing cavity to limit the sliding member 32 to slide towards the sealing cavity 312.

[0093] When the sliding member 32 is located on the side close to the sealing cavity 312, the ball 36 is released from the receiving groove 321 and falls into the release cavity 313, producing a sound to alert nearby personnel that valve 2 (see Figure 1 Switching from the open position to the closed position stops the injection of electrolyte, indicating that the electrolyte replenishment is complete.

[0094] For example, the ball bearing 36 can be made of at least one of metal or glass.

[0095] See also Figure 1 In one possible implementation, the valve body 1 is further provided with a liquid inlet channel 13 communicating with the valve cavity 11, and one end of the liquid inlet channel 13 communicating with the valve cavity 11 is the 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 internal structure of the valve body in the provided valve mechanism.

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

[0098] To the liquid inlet channel 13 (participating) Figure 1 When electrolyte is filled into the valve, the electrolyte flows along the first direction X, generating a thrust on the pusher 4, thereby causing the pusher 4 to slide along the first direction X, thus enabling the valve 2 to switch from the closed position to the open position.

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

[0100] In summary, the electrolyte injection process can be completed automatically and stopped automatically without manual control, saving labor costs. Furthermore, control is achieved solely through mechanical structures, offering greater stability and a longer device lifespan compared to related technologies that use sensor control.

[0101] It should be noted that the pusher 4 can slide along the first direction X, or it can slide in the opposite direction of the first direction X.

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

[0103] When valve 2 is in the closed position, it is located in the valve port 112 and is tightly fitted to the valve port 112. When valve 2 is in the open position, valve 2 is disengaged from the valve port 112, and there is a gap between valve 2 and valve port 112, through which electrolyte can flow.

[0104] For example, 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, which is disposed opposite to the valve port 112.

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

[0107] Thus, 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. Due to the limitation of 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 towards the top wall 14, thereby moving away from the valve port 112, thus switching the valve 2 from the closed position to the open position.

[0108] In one possible implementation, the top wall 14 is arranged parallel to the valve port 112. The valve 2 is provided with an adjusting surface 21. Along the first direction X, 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 X. When the pushing member 4 slides along the first direction X, it cooperates with the adjusting surface 21 to drive the valve 2 towards the top wall 14, thereby switching the valve 2 from the closed position to the open position.

[0109] In one possible implementation, the valve chamber 11 includes a limiting part, which is disposed opposite to the liquid inlet end 111, and the valve 2 is slidably connected to the limiting part. During the process of switching the valve 2 from the closed position to the open position, the limiting part restricts the valve 2 from sliding along the first direction X under the influence of the pushing member 4, and makes the valve 2 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 electrolyte.

[0110] like Figure 6 As shown, Figure 6 for Figure 1A structural schematic diagram of a pressure passage part in the valve mechanism is provided.

[0111] In one possible implementation, the valve body 1 is further provided with a pressure passage 5, a piston 51 and a second connecting member 52. The pressure passage 5 is located on the side of the valve cavity 11 opposite to the liquid inlet passage 13. One end of the pressure passage 5 is in communication with the valve cavity 11, and the other end of the pressure passage 5 is in communication with a storage device into which electrolyte is injected.

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

[0113] The electrolyte exists on both sides of the piston 51 in the pressure passage 5, i.e., the side close to the valve cavity 11 and the side close to the storage device. When the liquid level of the electrolyte in the storage device decreases, the pressure on the side of the piston 51 close to the storage device decreases, 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, and the piston 51 slides away from the valve cavity 11, thereby driving the pushing member 4 away from the liquid inlet passage 13 and driving the valve 2 to switch from the closed position to the open position.

[0114] When the liquid level of the electrolyte in the storage device rises, the pressure on the side of the piston 51 close to the storage device rises, the pressure on the side of the piston 51 close to the valve cavity 11 gradually becomes less than the pressure on the side close to the storage device, and the piston 51 slides towards the valve cavity 11, thereby having a force in the direction of making the pushing member 4 close to the liquid inlet passage 13 and assisting the valve 2 to move from the open position to the closed position.

[0115] In summary, by providing the pressure passage 5, the piston 51 and the second connecting member 52, the valve 2 can be assisted 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 the second connecting member 52 (see Figure 6 ) only have the function of connecting and driving, and the first connecting member 33 and the second connecting member 52 are not limited here.

[0117] The application further provides a liquid injection device, which comprises a liquid storage device, the valve mechanism 10 and a liquid inlet pipe. One end of the liquid inlet pipe is in communication with the liquid storage device, and the other end of the liquid inlet pipe is in communication with the liquid inlet passage 13.

[0118] The exemplary liquid storage device includes but is not limited to a liquid storage tank, a liquid storage bin and other devices capable of storing electrolyte.

[0119] As shown in Figure 7 , Figure 7 , the liquid storage device is a liquid storage tank. Figure 1The valve mechanism and the structure of the liquid injection device are provided. The application provides a liquid injection system, which comprises a liquid injection device, the liquid injection device and a liquid discharge pipe. One end of the liquid discharge pipe is communicated with the liquid injection device, and the other end of the liquid discharge pipe is communicated with the liquid outlet channel 12.

[0120] The exemplary liquid injection device includes but is not limited to a liquid storage tank, a liquid storage bin and other settings capable of storing electrolyte.

[0121] The application also provides a battery manufacturing equipment comprising the liquid injection system.

[0122] Although the application is described herein in conjunction with various embodiments, other variations and modifications of the disclosed embodiments can be understood and implemented by those skilled in the art upon reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and the indefinite articles "a" or "an" do not exclude a plurality. A single processor or other unit can fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

[0123] Although the application is described herein in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the description and drawings are to be regarded simply as illustrative of the application as defined by the appended claims, and are contemplated to cover any and all modifications, variations, combinations or equivalents that fall within the scope of the present application. Obviously, various modifications and changes can be made thereto without departing from the spirit and scope of the application. Accordingly, the application intends to embrace all such modifications and changes and therefore to be limited only by the scope of the following claims and their equivalents.

[0124] The above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A valve train (10) characterized by, The utility model relates to a valve body (1) and a sealing assembly (3) for the valve body (1), and the valve body (1) comprises: A valve body (1) is provided with a valve cavity (11) and a liquid outlet channel (12) communicated with the valve cavity (11) in the valve body (1), the liquid outlet channel (12) comprises a main body section (121) and a fast flow section (122) connected to the main body section (121), the fast flow section (122) comprises a contraction section (1221) and a diffusion section (1223), one end of the valve cavity (11) communicated by the liquid outlet channel (12) 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; A valve (2) is arranged in the valve cavity (11), and the valve (2) can move between a closed position and an open position relative to the valve cavity (11); A sealing assembly (3) comprises: A housing (31) forms a sliding cavity (311) inside the housing (31); A sliding piece (32) is slidably accommodated in the sliding cavity (311); A first connecting piece (33) is connected between the sliding piece (32) and the valve (2), the sliding cavity (311) comprises a sealing cavity (312) located on the side of the sliding piece (32) away from the first connecting piece (33); A communication structure (34) is provided with a communication channel in the communication structure (34), the communication channel comprises a first interface (341), a second interface (342) and a third interface (343), the first interface (341) is communicated with the sealing cavity (312), the second interface (342) is communicated with the diffusion section (1223), or the second interface (342) is communicated with the part of the fast flow section (122) between the contraction section (1221) and the diffusion section (1223), and the third interface (343) is communicated with the end of the liquid outlet channel (12) away from the valve cavity (11); When the sliding piece (32) slides to the sealing cavity (312), the first connecting piece (33) can drive the valve (2) to move from the open position to the closed position.

2. The valve train (10) according to claim 1, characterized in that The plane where 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) in the reference plane is arc-shaped, and the cross-section of the side wall of the fast flow section (122) in the reference plane arches towards the axis of the fast flow section (122).

3. The valve train (10) of claim 1, characterized in that The valve body (1) is further provided with a liquid inlet channel (13) communicated with the valve cavity (11), and the end of the liquid inlet channel (13) communicated with the valve cavity (11) is a liquid inlet end (111). The valve mechanism (10) further comprises a pusher (4) located in the valve cavity (11) and opposite to the liquid inlet end (111), the liquid inlet end (111) is directed to the first direction, the pusher (4) is slidably connected to the valve body (1) along the first direction, and when the pusher (4) slides along the first direction, the valve (2) can be switched from the closed position to the open position.

4. The valve train (10) according to claim 3, characterized in that The valve cavity (11) comprises a valve port (112) which is perpendicular to the first direction, the liquid outlet channel (12) is connected to the valve port (112), and 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) arranged opposite to the valve port (112). The valve (2) is provided with an adjusting surface (21), and the distance between the adjusting surface (21) and the top wall (14) increases along the first direction; the pusher (4) is slidably connected between the top wall (14) and the adjusting surface (21) along the first direction. The pusher (4) cooperates with the adjusting surface (21) to drive the valve (2) to move towards the top wall (14) when sliding along the first direction, so that the valve (2) is switched from the closed position to the open position.

5. The valve train (10) of claim 4, characterized in that The valve body (1) further comprises: A pressure channel (5) located on the side of the valve cavity (11) opposite to the liquid inlet channel (13) and communicating with the valve cavity (11); A piston (51) slidably accommodated in the pressure channel (5) along the length direction of the pressure channel (5); A second connecting member (52) connected between the piston (51) and the pusher (4).

6. The valve train (10) of claim 1, characterized in that The sliding cavity (311) further comprises a release cavity (313) located on the side of the sliding member (32) opposite to the sealing cavity (312); A tightness prevention member (35) is arranged between the surface of the sliding member (32) opposite to the sealing cavity (312) and the inner wall surface of the release cavity (313).

7. The valve train (10) according to claim 6, characterized in that The tightness prevention member (35) is a ball (36).

8. The valve train (10) according to claim 7, characterized in that The surface of the sliding member (32) opposite to the sealing cavity (312) is provided with a receiving groove (321), 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 part of the ball (36) protrudes from the surface of the sliding member (32) opposite to the sealing cavity (312).

9. A liquid injection device characterized by comprising: It comprises: A liquid storage device; A valve mechanism (10) as claimed in any one of claims 3-8; A liquid inlet pipe, one end of the liquid inlet pipe communicates with the liquid storage device, and the other end of the liquid inlet pipe communicates with the liquid inlet channel (13).

10. A liquid injection system characterized by comprising: It comprises: A liquid injection device; The liquid injection device according to claim 9. A liquid discharge pipe, one end of which communicates with the liquid injection device, the other end of which communicates with the liquid outlet passage (12).

11. A battery manufacturing apparatus, characterized by comprising: The liquid injection system according to claim 10.

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