Battery formation vacuum exhaust system

Abstract

The utility model provides a battery formation vacuum exhaust system, and relates to the technical field of lithium ion batteries. The battery formation vacuum exhaust system comprises a liquid storage device, a main pipeline, a regulating valve, a positive pressure device and a negative pressure device, the other end of the liquid storage device is connected with the front end of the main pipeline; the tail end of the main pipeline is connected to the adjusting valve and communicated with the positive pressure device and the negative pressure device through the adjusting valve. The negative pressure device is used for generating vacuum negative pressure through air exhaust; a gas storage container is arranged in the positive pressure device; and inert gas is filled in the gas storage container. According to the battery formation device, gas and electrolyte generated in the battery formation process are efficiently collected and treated, the exhaust efficiency is remarkably improved, and the loss of the electrolyte is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of lithium-ion batteries, and in particular to a battery formation vacuum exhaust system. Background Art

[0002] As an important component of modern energy storage technology, the manufacturing process of lithium-ion batteries involves multiple precise process steps. Among these steps, the formation process is particularly critical. It activates the active materials inside the battery through electrochemical reactions, laying the foundation for the battery's subsequent use. During the formation process, a solid electrolyte interface film (SEI film) forms on the surface of the negative electrode, which is an important guarantee for stable battery performance. At the same time, the formation process also produces gases. If these gases are not discharged in time, they will have an adverse effect on the performance of the battery cell.

[0003] In the prior art, negative pressure formation devices are typically used to achieve rapid and effective exhaust. These devices create a negative pressure environment within the battery to promote gas discharge, thereby maintaining the stability of the cell's internal structure and optimizing cell performance. However, this process is not perfect. Negative pressure formation devices have some objective technical drawbacks during operation. While gas is being extracted, electrolyte may also be drawn into the device and retained in areas such as the liquid collection cup and nozzle pipe. This retained electrolyte may crystallize over time, leading to pipe blockage and affecting the cell's exhaust efficiency.

[0004] Furthermore, pipe blockage not only reduces equipment efficiency but can also damage the battery cells themselves. Poor exhaust can lead to abnormalities such as core wrinkles and black spots on the interface, which directly impact battery performance and quality. Core wrinkles can damage the internal structure of the cell, while black spots on the interface can affect the battery's charge and discharge efficiency and even shorten its service life. Therefore, existing technologies have significant limitations in ensuring cell performance and extending battery life.

[0005] In summary, existing negative pressure formation devices have shortcomings in addressing electrolyte retention and pipe blockage. These issues not only affect the exhaust efficiency of the battery cells but can also lead to reduced cell performance and shortened battery life. These issues limit the application of existing technologies in the lithium-ion battery manufacturing process and urgently need to be addressed through technological innovation. Utility Model Content

[0006] In view of this, the purpose of this application is to provide a battery formation vacuum exhaust system, which aims to solve technical problems such as core wrinkles and interface black spots on battery cells caused by related negative pressure formation technology.

[0007] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0008] The present invention provides a battery formation vacuum exhaust system, comprising:

[0009] Liquid storage device, main line, regulating valve, positive pressure device and negative pressure device;

[0010] One end of the liquid storage device is connected to the liquid filling port of the battery, and the other end is connected to the front end of the main line;

[0011] The tail end of the main line is connected to the regulating valve and is communicated with the positive pressure device and the negative pressure device respectively through the regulating valve;

[0012] The regulating valve is used to connect the main line with any one of the positive pressure device and the negative pressure device;

[0013] The negative pressure device is used to generate vacuum negative pressure by pumping air;

[0014] The positive pressure device is provided with a gas storage container; the gas storage container is provided with inert gas.

[0015] In one embodiment, the liquid storage device includes a liquid storage body and a lower end pipeline connected to the liquid storage body;

[0016] The liquid storage body is connected to the liquid injection port through the lower end pipeline.

[0017] In one embodiment, the liquid storage device includes a liquid storage body and a lower end pipeline connected to the liquid storage body;

[0018] The liquid storage body is connected to the liquid injection port through the lower end pipeline.

[0019] In one embodiment, the air extraction tube is vertically arranged, one end of which is connected to the liquid injection port, and the other end of which extends into the liquid storage body;

[0020] The height of the air extraction pipe in the liquid storage body is higher than the liquid level of the electrolyte, so that the electrolyte can enter the liquid storage body through the air extraction pipe and the electrolyte will not flow back through the upper opening of the air extraction pipe.

[0021] In one embodiment, the air extraction pipe is provided with an air extraction valve;

[0022] The liquid discharge pipe is provided with a liquid discharge valve.

[0023] In one embodiment, the connection between the liquid discharge pipe and the air extraction pipe is lower than the air extraction valve in the vertical direction of the air extraction pipe.

[0024] In one embodiment, the liquid storage body is further provided with a snap-on opening device;

[0025] The liquid storage device also includes a liquid injection container;

[0026] The liquid injection container is provided with an exogenous electrolyte, and the liquid injection container can be detachably connected to the snap-on opening device so that the exogenous electrolyte in the liquid injection container can enter the liquid storage body through vacuum or gravity.

[0027] In one embodiment, the snap-fit ​​opening device includes an opening body, an elastic outer ring pressing portion, and an elastic snap-fit ​​member;

[0028] The liquid injection container is provided with a liquid injection connector;

[0029] The elastic outer ring pressing portion is arranged on the outside of the opening body, and the opening body is provided with an opening area;

[0030] The elastic clamping piece can cover the opening area to form a seal, and under the pressure of the elastic outer ring pressing portion, it is away from the opening area, so that the liquid injection connector of the liquid injection container can be inserted into the opening area to inject liquid.

[0031] In one embodiment, the elastic outer ring pressing portion includes a pressing ring, a vertical annular spring connected to the pressing ring, a horizontal barrier connected to the vertical annular spring and extending from the side wall of the opening body, and a vertical member connected to the pressing ring and passing through the opening body;

[0032] The elastic clamping member includes a vertical barrier member, a horizontal spring and a movable sealing member;

[0033] The vertical member abuts against the movable sealing member;

[0034] One end of the horizontal spring is connected to the movable sealing member, and the other end is connected to the vertical barrier member;

[0035] The movable sealing member can move horizontally along the length direction of the spring;

[0036] When the pressing ring is pressed downward, the vertical annular spring can be deformed, and the vertical member moves downward synchronously, so that the movable sealing member is horizontally away from the opening area, so that the liquid filling connector of the liquid filling container can be inserted into the opening area for liquid filling.

[0037] In one embodiment, the liquid injection connector of the liquid injection container includes a connecting tube body and a symmetrically arranged snap-fit ​​groove on a side wall of the connecting tube body;

[0038] The snap-fit ​​opening device includes at least two sets of symmetrically arranged elastic snap-fit ​​parts;

[0039] The movable sealing members in the symmetrically arranged snap-fit ​​opening device can dock with each other to form a seal on the opening area;

[0040] The movable sealing member corresponds to the clamping groove and can be clamped in the corresponding clamping groove.

[0041] The beneficial effects of this application are:

[0042] The present application provides a battery formation vacuum exhaust system, comprising: a liquid storage device, a main line, a regulating valve, a positive pressure device and a negative pressure device; one end of the liquid storage device is connected to the liquid filling port of the battery, and the other end is connected to the front end of the main line; the tail end of the main line is connected to the regulating valve, and is connected to the positive pressure device and the negative pressure device respectively through the regulating valve; the regulating valve is used to connect the main line with either the positive pressure device or the negative pressure device; the negative pressure device is used to generate vacuum negative pressure by pumping air; a gas storage container is provided in the positive pressure device; and an inert gas is provided in the gas storage container.

[0043] Through its innovative design, the battery formation vacuum exhaust system achieves efficient collection and treatment of gases and electrolytes generated during the battery formation process, significantly improving exhaust efficiency and reducing electrolyte loss. The system precisely controls pressure through regulating valves and flexibly switches between positive and negative pressure devices, optimizing the electrolyte reflux and gas exhaust process. The use of a liquid storage device effectively prevents the retention and crystallization of electrolyte in the pipeline, reducing the risk of pipeline blockage and extending the service life of the equipment. In addition, the use of inert gas for positive pressure reflux ensures the uniform distribution of electrolyte inside the battery, improving battery performance and safety while reducing the risk of possible chemical reactions. The flexibility and adaptability of the system enable it to meet the formation needs of different types of batteries. It has broad industrial application prospects and has brought significant technological progress and economic benefits to the battery manufacturing industry.

[0044] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0046] Figure 1A schematic diagram showing the overall structure and connection relationship of a battery formation vacuum exhaust system in some embodiments of the present application is shown;

[0047] Figure 2 A schematic cross-sectional view of a liquid storage device of a battery formation vacuum exhaust system in some embodiments of the present application is shown;

[0048] Figure 3 A schematic cross-sectional view of a snap-on opening device (unpressed) of a battery formation vacuum exhaust system in some embodiments of the present application is shown;

[0049] Figure 4 A schematic cross-sectional view of a snap-on opening device (in a pressed state, with the liquid injection connector of the liquid injection container inserted) of a battery formation vacuum exhaust system in some embodiments of the present application is shown;

[0050] Figure 5 A partially enlarged cross-sectional structural schematic diagram of the connection relationship between the liquid injection connector and the movable sealing member after the liquid injection connector is inserted into the liquid injection container and the pressing state is released in some embodiments of the battery formation vacuum exhaust system of the present application.

[0051] Reference numerals:

[0052] 100-battery formation vacuum exhaust system; 1-liquid storage device; 11-liquid storage body; 12-lower end pipeline; 121-exhaust pipe; 122-exhaust valve; 123-liquid discharge pipe; 124-liquid discharge valve; 13-snapping opening device; 131-opening body; 132-elastic outer ring pressing part; 1321-pressing ring; 1322-vertical annular spring; 1323-horizontal spacer; 1324- Vertical part; 133-elastic snap-fit ​​part; 1331-vertical spacer; 1332-horizontal spring; 1333-movable sealing part; 134-opening area; 14-liquid filling container; 141-liquid filling connector; 1411-connecting tube body; 1412-snap-fit ​​groove; 2-main line; 3-regulating valve; 4-positive pressure device; 41-gas storage container; 5-negative pressure device; 200-battery; 210-liquid filling port. DETAILED DESCRIPTION

[0053] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0054] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0056] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0057] refer to Figure 1 In an embodiment of the present application, a battery formation vacuum exhaust system 100 is provided, comprising:

[0058] Liquid storage device 1, main line 2, regulating valve 3, positive pressure device 4 and negative pressure device 5;

[0059] One end of the liquid storage device 1 is connected to the liquid filling port 210 of the battery 200, and the other end is connected to the front end of the main line 2;

[0060] The tail end of the main line 2 is connected to the regulating valve 3 and is communicated with the positive pressure device 4 and the negative pressure device 5 respectively through the regulating valve 3;

[0061] The regulating valve 3 is used to connect the main line 2 with any one of the positive pressure device 4 and the negative pressure device 5;

[0062] The negative pressure device 5 is used to generate vacuum negative pressure by pumping air;

[0063] The positive pressure device 4 is provided with a gas storage container 41 ; the gas storage container 41 is provided with an inert gas.

[0064] The battery formation vacuum exhaust system 100 provided in the embodiment of the present application is specially designed for processing the gas and electrolyte generated during the formation process of the lithium-ion battery 200.

[0065] During the formation process of lithium-ion battery 200, a solid electrolyte interface film (SEI) forms on the negative electrode surface, generating gases. If these gases are not discharged in a timely manner, they will affect the performance of battery 200. The system uses the vacuum negative pressure generated by negative pressure device 5 to promote the discharge of gases and electrolyte, ensuring the stability of the internal structure of the battery cell.

[0066] In conventional methods and devices, electrolyte may be drawn out during the venting process and retained in the collection cup or pipe, resulting in electrolyte loss and uneven distribution. This system collects electrolyte through the liquid storage device 1 and uses the inert gas in the positive pressure device 4 to re-inject the electrolyte into the battery 200, reducing electrolyte loss and ensuring uniform electrolyte distribution.

[0067] Retained electrolyte crystallizes in the pipes, potentially causing blockages and impacting equipment efficiency and lifespan. This system reduces electrolyte retention in the pipes through effective gas and liquid management, thereby minimizing the risk of blockages.

[0068] As mentioned above, in the battery formation vacuum exhaust system 100, the liquid storage device 1 is one of the core components of the system, used to collect electrolyte extracted from the liquid injection port 210 of the battery 200. One end of the liquid storage device 1 is connected to the liquid injection port 210 of the battery 200, and the other end is connected to the front end of the main line 2, ensuring smooth transfer of electrolyte.

[0069] As described above, the main line 2, as a channel connecting the liquid storage device 1 and the regulating valve 3, plays the role of transmitting the electrolyte. Its design needs to ensure sufficient fluidity to facilitate the flow of the electrolyte and subsequent processing.

[0070] It should be noted that the battery formation vacuum exhaust system 100 provided in this embodiment can perform formation processing on a group of batteries 200 or simultaneously on multiple groups of batteries 200. Specifically, multiple liquid storage devices 1 can be connected via the main line 2 and then connected to the liquid injection ports 210 of different batteries 200.

[0071] As mentioned above, regulating valve 3 is the control center of the system, used to connect the main line 2 to either the positive pressure device 4 or the negative pressure device 5 according to the needs of the formation process. Through precise control of regulating valve 3, precise adjustment of electrolyte return and gas discharge pressure can be achieved. Regulating valve 3 switches between different modes: vacuum pumping mode and vacuum breaking mode by inputting inert gas.

[0072] As mentioned above, the positive pressure device 4 includes a gas storage container 41, which stores inert gas. When the electrolyte needs to flow back to the battery 200, the positive pressure device 4 is connected to the main line 2 through the regulating valve 3, and the inert gas is used to push the electrolyte back into the battery 200.

[0073] In this embodiment, electrolyte reflux is achieved by reinjecting an inert gas with a purity of more than 99% into the battery cell. The inert gas has the advantages of inertness and low density. It should be noted that other inert gases (such as nitrogen, argon, etc.) can be used for positive pressure reflux. These gases also have the characteristic of not chemically reacting with the electrolyte or the battery 200 materials, and can transport the retained electrolyte back to the interior of the battery cell through positive pressure to achieve a similar effect.

[0074] As described above, the negative pressure device 5 is used to generate a vacuum negative pressure to facilitate the discharge of gas from the battery 200. When gas is generated during the formation process of the battery 200, the negative pressure device 5 is connected to the main line 2 through the regulating valve 3 to extract the gas, thereby reducing the adverse effects of the gas on the performance of the battery 200.

[0075] As described above, the liquid storage device 1 is directly connected to the liquid injection port 210 of the battery 200, ensuring direct collection of the electrolyte. The main line 2 connects the liquid storage device 1 to the regulating valve 3, forming a channel for the flow of the electrolyte. The regulating valve 3 serves as a connection point and can be selectively connected to the positive pressure device 4 or the negative pressure device 5 as needed, achieving precise control of the flow of electrolyte and gas. The positive pressure device 4 and the negative pressure device 5 are connected to the main line 2 through the regulating valve 3, achieving control of electrolyte reflux and gas discharge.

[0076] By precisely controlling gas exhaust and electrolyte reflux during the formation process, the system helps improve the performance and safety of battery 200. The evenly distributed electrolyte facilitates stable charging and discharging of battery 200, while the use of inert gas prevents possible chemical reactions, increasing the safety of battery 200.

[0077] The system design allows it to adapt to different types and specifications, as well as different numbers of batteries 200 required for formation, providing flexibility and wide applicability.

[0078] In summary, the battery formation vacuum exhaust system 100 of the present application is comprehensively designed for gas exhaust, electrolyte management, equipment maintenance and battery 200 performance improvement during the formation process of the lithium-ion battery 200, so as to improve the overall efficiency and quality of battery 200 manufacturing.

[0079] For further reference, Figure 2 The liquid storage device 1 includes a liquid storage body 11 and a lower end pipeline 12 connected to the liquid storage body 11;

[0080] The liquid storage body 11 is connected to the liquid injection port 210 through the lower end pipeline 12 .

[0081] As described above, the liquid storage body 11 can be used to accommodate the “endogenous” electrolyte that flows into the battery 200 after being vacuum-sucked.

[0082] As mentioned above, in terms of spatial position, the liquid storage body 11 can be disposed above the liquid injection port 210 of the battery 200 that needs to be formed.

[0083] As mentioned above, the lower end pipe 12 is connected to the liquid injection port 210 , so that the electrolyte can enter the liquid storage body 11 through the lower end pipe 12 under a vacuum state.

[0084] Furthermore, the lower end pipeline 12 includes an air extraction pipe 121 and a liquid discharge pipe 123;

[0085] One end of the air extraction pipe 121 is connected to the liquid storage body 11, and the other end is connected to the liquid injection port 210;

[0086] One end of the liquid discharge pipe 123 is connected to the bottom end of the liquid storage body 11 , and the other end is connected to the air extraction pipe 121 .

[0087] To achieve separate control of the "endogenous" electrolyte, the suction and release processes are separated. In this embodiment, an air extraction pipe 121 and a liquid discharge pipe 123 are provided. The air extraction pipe 121 is used to extract air from the liquid injection port 210 of the battery 200 and extract the endogenous electrolyte into the liquid storage body 11; the liquid discharge pipe 123 is used to return the electrolyte in the liquid storage body 11 to the battery 200.

[0088] The air extraction pipe 121 and the liquid discharge pipe 123 may be provided with corresponding valves for respective control.

[0089] Furthermore, the air extraction pipe 121 is vertically arranged, one end of which is connected to the liquid injection port 210 and the other end of which extends into the liquid storage body 11;

[0090] The height of the exhaust pipe 121 in the liquid storage body 11 is higher than the liquid level of the electrolyte, so that the electrolyte can enter the liquid storage body 11 through the exhaust pipe 121 and the electrolyte will not flow back through the upper opening of the exhaust pipe 121.

[0091] As mentioned above, the exhaust pipe 121 can be set vertically in its setting direction, and one end thereof extends into the liquid storage body 11. The height of the upper opening of the pipe is required to be higher than the height of the electrolyte page in the liquid storage body 11. Therefore, when the liquid storage body 11 is vacuum-extracted, the gas can be extracted from the exhaust pipe 121. If the electrolyte flows under vacuum, part of the electrolyte will also be extracted from the exhaust pipe 121 and enter the liquid storage body 11. Since the position of the upper opening is higher, the electrolyte will not flow into or contact the upper opening, and therefore will not be sucked into the battery 200 again by the exhaust pipe 121 to form a backflow.

[0092] If electrolyte needs to be input into the battery 200 , it is only necessary to close the negative pressure device 5 and / or open the positive pressure device 4 to release the electrolyte in the liquid storage body 11 into the battery 200 through the drain pipe 123 at the lower end of the liquid storage body 11 .

[0093] Furthermore, the air extraction pipe 121 is provided with an air extraction valve 122;

[0094] The drain pipe 123 is provided with a drain valve 124 .

[0095] Individual control of each pipeline is achieved through the air extraction valve 122 and the liquid discharge valve 124 .

[0096] Furthermore, the connection between the liquid discharge pipe 123 and the air extraction pipe 121 is lower than the air extraction valve 122 in the vertical direction of the air extraction pipe 121 .

[0097] The above describes the relative positions of the gas extraction pipe 121 and the liquid discharge pipe 123 at the connection point in the liquid storage device 1. This design ensures that the liquid discharge pipe 123 is positioned vertically below the gas extraction valve 122 relative to the gas extraction pipe 121. This layout helps optimize the flow of electrolyte and the gas extraction process.

[0098] The exhaust pipe 121 is provided with an exhaust valve 122 for controlling the extraction of gas from the interior of the battery 200 into the liquid storage body 11. The exhaust valve 122 is positioned higher than the connection point between the drain pipe 123 and the exhaust pipe 121. This prevents electrolyte from flowing back through the exhaust pipe 121, ensuring that the electrolyte can enter the liquid storage body 11 smoothly.

[0099] The drain pipe 123 is provided with a drain valve 124 for controlling the electrolyte from the liquid storage body 11 back into the battery 200. The provision of the drain valve 124 helps to precisely control the flow of the electrolyte, ensuring that the electrolyte can be re-injected into the battery 200 when needed.

[0100] Through this specific connection method and valve configuration, the system can utilize the inert gas in the positive pressure device 4 to push the electrolyte from the liquid storage body 11 back into the battery 200 through the drain pipe 123 when the vacuum is broken. This design helps reduce electrolyte loss and ensures uniform distribution of the electrolyte within the battery 200.

[0101] Since the connection between the drain pipe 123 and the exhaust pipe 121 is lower than the exhaust valve 122 in the vertical direction of the exhaust pipe 121, this design can prevent the electrolyte from flowing back through the upper opening of the exhaust pipe 121 during the draining process, thereby ensuring the unidirectional flow of the electrolyte and avoiding possible mixing and contamination.

[0102] For further reference, Figure 3 , the liquid storage body 11 is further provided with a snap-on opening device 13;

[0103] The liquid storage device 1 further includes a liquid injection container 14;

[0104] The liquid injection container 14 is provided with an exogenous electrolyte, and the liquid injection container 14 can be detachably connected to the snap-on opening device 13 so that the exogenous electrolyte in the liquid injection container 14 can enter the liquid storage body 11 through vacuum or gravity.

[0105] As mentioned above, the liquid storage body 11 is provided with a snap-on opening device 13 , which is a quick connection and disconnection mechanism for realizing a quick connection between the liquid storage body 11 and other components.

[0106] The liquid storage device 1 also includes a liquid injection container 14, which contains exogenous electrolyte. This design allows the system to add new electrolyte to the liquid storage body 11 when needed to ensure an adequate supply of electrolyte during the formation process of the battery 200.

[0107] The liquid filling container 14 can be detachably connected to the snap-on opening device 13. This design provides a simple method to replenish or replace the electrolyte in the liquid storage body 11 without having to perform complex operations on the entire system.

[0108] The exogenous electrolyte in the liquid injection container 14 can enter the liquid storage body 11 through vacuum or gravity. This design provides two ways to replenish the electrolyte, and the most appropriate method can be selected according to actual process requirements and operating conditions.

[0109] It should be noted that the liquid injection container 14 can be made of a transparent material, and its outer surface can be provided with scale lines to observe and control the amount of injected electrolyte. A dedicated valve can be provided at the connection with the liquid storage body 11 to control the addition amount.

[0110] In addition, automatic control can also be achieved through flow sensors and electronically controlled valves.

[0111] By introducing the liquid filling container 14 and the snap-on opening device 13, the system can flexibly replenish the electrolyte during the formation process of the battery 200, thereby improving the flexibility and practicality of the system. This design is particularly suitable for battery 200 production environments that require long or multiple formation processes.

[0112] This improved design helps optimize the battery 200 formation process and ensures a continuous supply of electrolyte, thereby improving the performance and consistency of the battery 200. It also helps reduce the risk of battery 200 performance degradation or production interruption due to insufficient electrolyte.

[0113] In summary, the introduction of the liquid injection container 14 and the snap-on opening device 13 provides a simple and flexible electrolyte replenishment method for the battery formation vacuum exhaust system 100. This design not only improves the practicality of the system, but also helps optimize the battery 200 formation process and ensure the quality and performance of the battery 200.

[0114] For further reference, Figure 4 The snap-fit ​​opening device 13 includes an opening body 131, an elastic outer ring pressing portion 132 and an elastic snap-fit ​​member 133;

[0115] The liquid injection container 14 is provided with a liquid injection connector 141;

[0116] The elastic outer ring pressing portion 132 is provided on the outside of the opening body 131 , and the opening body 131 is provided with an opening area 134 ;

[0117] The elastic clamping member 133 can cover the opening area 134 to form a seal, and under the pressure of the elastic outer ring pressing portion 132, it is away from the opening area 134 to facilitate the insertion of the liquid injection connector 141 of the liquid injection container 14 into the opening area 134 for injection.

[0118] In this embodiment, the snap-on opening device 13 in the battery formation vacuum exhaust system 100 is detailed. This device is used to achieve a fast and reliable connection between the liquid injection container 14 and the liquid storage body 11.

[0119] As mentioned above, the snap-fit ​​opening device 13 is composed of three main parts: an opening body 131 , an elastic outer ring pressing portion 132 and an elastic snap-fit ​​member 133 .

[0120] The liquid injection container 14 is provided with a liquid injection connecting piece 141 , which is a component that cooperates with the snap-fit ​​opening device 13 to achieve connection between the two.

[0121] The elastic outer ring pressing portion 132 is located outside the opening body 131. When the liquid injection container 14 needs to be connected, the operator can compress the elastic clamping member 133 by pressing the elastic outer ring pressing portion 132, thereby inserting the liquid injection connector 141.

[0122] An opening area 134 is provided in the opening body 131, which is where the liquid injection connector 141 is inserted. When not connected, the elastic clamping member 133 will block the opening area 134 to form a seal to prevent electrolyte leakage or external impurities from entering.

[0123] The cross-sectional shape of the opening area 134 can be circular, rectangular or other shapes, as long as it matches the connection of the liquid injection container 14 to avoid air leakage.

[0124] As mentioned above, the elastic clip 133 blocks the opening area 134 to form a seal under normal conditions. When the elastic outer ring pressing portion 132 is pressed, the elastic clip 133 moves away from the opening area 134, allowing the liquid injection connector 141 to be inserted into the opening area 134 for liquid injection.

[0125] This design allows for quick and easy connection of the filling container 14 while ensuring that the electrolyte does not leak during the connection and disconnection process, maintaining the sealing of the system.

[0126] By operating the elastic outer ring pressing portion 132 , the connection and disconnection between the liquid injection container 14 and the liquid storage body 11 can be easily achieved without the need for additional tools or complicated operations, thereby improving the convenience of operation.

[0127] The design of the snap-fit ​​opening device 13 improves the flexibility of the entire battery formation vacuum exhaust system 100, so that electrolyte replenishment can be carried out quickly when needed without the need for complex adjustments to the entire system.

[0128] In summary, the snap-on opening device 13 provides a fast and reliable electrolyte replenishment method for the battery formation vacuum exhaust system 100. This design not only improves the convenience of operation, but also ensures the sealing and flexibility of the system, which helps to optimize the battery 200 formation process.

[0129] Furthermore, the elastic outer ring pressing portion 132 includes a pressing ring 1321, a vertical annular spring 1322 connected to the pressing ring 1321, a horizontal spacer 1323 connected to the vertical annular spring 1322 and extending from the side wall of the opening body 131, and a vertical member 1324 connected to the pressing ring 1321 and penetrating the opening body 131.

[0130] The elastic clamping member 133 includes a vertical barrier member 1331, a horizontal spring 1332 and a movable sealing member 1333;

[0131] The vertical member 1324 abuts against the movable sealing member 1333;

[0132] One end of the horizontal spring 1332 is connected to the movable sealing member 1333 , and the other end is connected to the vertical barrier member 1331 ;

[0133] The movable sealing member 1333 can move horizontally along the length direction of the spring;

[0134] When the pressing ring 1321 is pressed downward, the vertical annular spring 1322 can be deformed, and the vertical member 1324 moves downward synchronously, so that the movable sealing member 1333 moves away from the opening area 134 in the horizontal direction, so that the liquid injection connector 141 of the liquid injection container 14 can be inserted into the opening area 134 to inject liquid.

[0135] As described above, in this embodiment, the structure of the clamping opening device 13 in the battery formation vacuum exhaust system 100 is further refined, especially the composition and operation mechanism of the elastic outer ring pressing portion 132 and the elastic clamping member 133 .

[0136] As mentioned above, the elastic outer ring pressing portion 132 comprises a pressing ring 1321, a vertical annular spring 1322, a horizontal spacer 1323, and a vertical member 1324. The pressing ring 1321 is the portion that the operator directly presses, while the vertical annular spring 1322 connects the pressing ring 1321 and the horizontal spacer 1323. The horizontal spacer 1323 extends from the sidewall of the opening body 131. The vertical member 1324 passes through the opening body 131 and abuts against the movable sealing member 1333.

[0137] As mentioned above, the vertical member 1324 passes through the opening body 131 and contacts the movable sealing member 1333. When the pressing ring 1321 is pressed downward, the vertical member 1324 can achieve synchronous downward movement with the pressing ring 1321. Since the opening body 131 passes through the middle, the opening body 131 is connected to the liquid storage body 11. The opening body 131 can be provided with a groove or a sliding groove specifically for the connection structure between the vertical member 1324 and the pressing ring 1321. In order to maintain the sealing state and avoid unnecessary vacuum breaking and air leakage, conventional methods can be used, such as but not limited to:

[0138] (1) Internal Sealing Structure: An internal sealing structure, such as a sealing gasket or O-ring, is designed at the contact portion between the vertical member 1324 and the opening body 131. This sealing structure can maintain a sealed contact with the opening body 131 when the vertical member 1324 moves, thereby preventing gas leakage.

[0139] (2) Sliding seal: Sliding sealing technology is used, such as using sealing rings made of polytetrafluoroethylene (PTFE) or other low friction coefficient materials, which can provide good sealing performance while reducing wear when the vertical member 1324 moves.

[0140] (3) Dynamic sealing system: A dynamic sealing system is designed that can automatically adjust the position of the sealing member when the vertical member 1324 moves, ensuring that the sealing member always maintains contact with the vertical member 1324, thereby maintaining the seal.

[0141] (4) Elastic seal: An elastic seal, such as a spring-loaded sealing ring, is used. This seal can expand and contract as the vertical member 1324 moves, always maintaining contact with the vertical member 1324, thereby achieving dynamic sealing.

[0142] (5) Double seal: Double seal is set at the position where the vertical member 1324 passes through, that is, seals are set on both sides of the vertical member 1324, so that even if the seal on one side fails, the seal on the other side can still maintain the sealing of the system.

[0143] (6) Sealed cavity design: A sealed cavity is designed inside the opening body 131 to accommodate a seal and provide a seal for the vertical member 1324 when it moves. This design ensures that the seal maintains contact with the vertical member 1324 even under pressure changes.

[0144] (7) Adaptive sealing: An adaptive sealing structure is designed, which can automatically adjust the sealing pressure according to the position change of the vertical member 1324 to ensure that good sealing performance can be maintained under different operating conditions.

[0145] By combining one or more of the above solutions, it is possible to ensure that when the vertical member 1324 passes through the opening body 131, the system can remain sealed, avoiding unnecessary vacuum breaking and air leakage, thereby improving the reliability and efficiency of the battery formation vacuum exhaust system 100.

[0146] As mentioned above, the elastic clamping member 133 includes a vertical spacer 1331, a horizontal spring 1332, and a movable sealing member 1333. The vertical spacer 1331 is fixed, and one end of the horizontal spring 1332 is connected to the movable sealing member 1333 and the other end is connected to the vertical spacer 1331. The movable sealing member 1333 can move horizontally along the length of the spring.

[0147] As mentioned above, when the pressing ring 1321 is pressed downward, the vertical annular spring 1322 deforms, causing the vertical member 1324 to move downward in tandem. This movement causes the movable sealing member 1333 to move horizontally away from the opening area 134, thereby opening the opening area 134 that was originally blocked by the elastic clamping member 133 and providing space for the liquid filling connector 141 of the liquid filling container 14 to be inserted.

[0148] This design allows for quick and easy connection of the liquid filling container 14 while ensuring that the electrolyte does not leak during connection and disconnection, maintaining the system's tightness. The elastic outer ring pressing portion 132 allows for easy connection and disconnection between the liquid filling container 14 and the liquid storage body 11, without the need for additional tools or complex operations, thus improving operational convenience and safety.

[0149] The design of the snap-on opening device 13 improves the flexibility and ease of operation of the entire battery formation vacuum exhaust system 100, allowing for quick replenishment of electrolyte when needed without requiring complex adjustments to the entire system, thereby helping to optimize the battery 200 formation process.

[0150] For further reference, Figure 5 The liquid injection connector 141 of the liquid injection container 14 includes a connecting tube body 1411 and a symmetrically arranged snap-fit ​​groove 1412 on the side wall of the connecting tube body 1411;

[0151] The snap-fit ​​opening device 13 includes at least two sets of elastic snap-fit ​​members 133 symmetrically arranged;

[0152] The movable sealing members 1333 in the symmetrically arranged snap-fit ​​opening device 13 can dock with each other and seal the opening area 134 ;

[0153] The movable sealing member 1333 corresponds to the engaging groove 1412 and can be engaged in the corresponding engaging groove 1412 .

[0154] As mentioned above, the liquid injection connector 141 includes a connecting tube 1411, which is the main structure for connecting the liquid injection container 14 to the snap-fit ​​opening device 13. On the sidewalls of the connecting tube 1411, snap-fit ​​grooves 1412 are symmetrically provided, and these snap-fit ​​grooves 1412 are used to cooperate with the elastic snap-fit ​​members 133 in the snap-fit ​​opening device 13.

[0155] As mentioned above, the snap-fit ​​opening device 13 includes at least two sets of symmetrically arranged elastic snap-fit ​​members 133. The design of these elastic snap-fit ​​members 133 allows the liquid injection connector 141 to be firmly connected to the snap-fit ​​opening device 13. In this embodiment, two sets of elastic snap-fit ​​members 133 are provided.

[0156] As described above, the symmetrically arranged movable sealing members 1333 can dock with each other and form a seal for the opening area 134. This design ensures that when the liquid injection connector 141 is not connected, the snap-fit ​​opening device 13 can maintain a sealed state to prevent gas leakage.

[0157] As described above, the movable sealing member 1333 corresponds to the snap-fit ​​groove 1412 on the liquid injection connector 141 and can be snap-fitted into the corresponding snap-fit ​​groove 1412. This matching relationship not only ensures the stability of the connection, but also enables the liquid injection connector 141 to easily engage and disengage with the snap-fit ​​opening device 13.

[0158] By symmetrically setting the clamping groove 1412 and the elastic clamping member 133, the operator can easily connect the liquid filling container 14 to the clamping opening device 13 without complicated alignment or locking process. This design simplifies the operation steps and improves work efficiency.

[0159] When the liquid injection connector 141 is correctly connected to the snap-on opening device 13, the movable sealing member 1333 cooperates with the snap-on groove 1412 to form a sealed connection interface, ensuring that no leakage occurs during the electrolyte transmission process and maintaining the sealing and safety of the system.

[0160] This design provides a flexible connection method, so that the electrolyte in the liquid filling container 14 can be quickly replaced or replenished as needed without affecting the normal operation of the entire battery formation vacuum exhaust system 100.

[0161] In summary, the design of the liquid injection connector 141 and the snap-on opening device 13 provides a convenient and reliable connection method for the battery formation vacuum exhaust system 100. This design not only simplifies the operation process, but also ensures the sealing and safety of the system, helping to improve the efficiency and reliability of the entire battery 200 formation process.

[0162] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0163] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery formation vacuum exhaust system, characterized in that: include: Liquid storage device, main line, regulating valve, positive pressure device and negative pressure device; One end of the liquid storage device is connected to the liquid filling port of the battery, and the other end is connected to the front end of the main line; The tail end of the main line is connected to the regulating valve and is communicated with the positive pressure device and the negative pressure device respectively through the regulating valve; The regulating valve is used to connect the main line with any one of the positive pressure device and the negative pressure device; The negative pressure device is used to generate vacuum negative pressure by pumping air; The positive pressure device is provided with a gas storage container; the gas storage container is provided with inert gas.

2. The battery formation vacuum exhaust system according to claim 1, characterized in that: The liquid storage device includes a liquid storage body and a lower end pipeline connected to the liquid storage body; The liquid storage body is connected to the liquid injection port through the lower end pipeline.

3. The battery formation vacuum exhaust system according to claim 2, characterized in that: The lower end pipeline includes an air extraction pipe and a liquid discharge pipe; One end of the air extraction pipe is connected to the liquid storage body, and the other end is connected to the liquid injection port; One end of the liquid discharge pipe is connected to the bottom end of the liquid storage body, and the other end is connected to the air extraction pipe.

4. The battery formation vacuum exhaust system according to claim 3, characterized in that: The air extraction pipe is vertically arranged, one end of which is connected to the liquid injection port, and the other end of which extends into the liquid storage body; The height of the air extraction pipe in the liquid storage body is higher than the liquid level of the electrolyte, so that the electrolyte can enter the liquid storage body through the air extraction pipe and the electrolyte will not flow back through the upper opening of the air extraction pipe.

5. The battery formation vacuum exhaust system according to claim 3, characterized in that: The air extraction pipe is provided with an air extraction valve; The liquid discharge pipe is provided with a liquid discharge valve.

6. The battery formation vacuum exhaust system according to claim 5, characterized in that: The connection between the liquid discharge pipe and the air extraction pipe is lower than the air extraction valve in the vertical direction of the air extraction pipe.

7. The battery formation vacuum exhaust system according to claim 2, characterized in that: The liquid storage body is also provided with a snap-on opening device; The liquid storage device also includes a liquid injection container; The liquid injection container is provided with an exogenous electrolyte, and the liquid injection container can be detachably connected to the snap-on opening device so that the exogenous electrolyte in the liquid injection container can enter the liquid storage body through vacuum or gravity.

8. The battery formation vacuum exhaust system according to claim 7, characterized in that: The clamping opening device comprises an opening body, an elastic outer ring pressing portion and an elastic clamping piece; The liquid injection container is provided with a liquid injection connector; The elastic outer ring pressing portion is arranged on the outside of the opening body, and the opening body is provided with an opening area; The elastic clamping piece can cover the opening area to form a seal, and under the pressure of the elastic outer ring pressing portion, it is away from the opening area, so that the liquid injection connector of the liquid injection container can be inserted into the opening area to inject liquid.

9. The battery formation vacuum exhaust system according to claim 8, characterized in that: The elastic outer ring pressing portion includes a pressing ring, a vertical annular spring connected to the pressing ring, a horizontal barrier connected to the vertical annular spring and extending from the side wall of the opening body, and a vertical member connected to the pressing ring and passing through the opening body; The elastic clamping member includes a vertical barrier member, a horizontal spring and a movable sealing member; The vertical member abuts against the movable sealing member; One end of the horizontal spring is connected to the movable sealing member, and the other end is connected to the vertical barrier member; The movable sealing member can move horizontally along the length direction of the spring; When the pressing ring is pressed downward, the vertical annular spring can be deformed, and the vertical member moves downward synchronously, so that the movable sealing member is horizontally away from the opening area, so that the liquid filling connector of the liquid filling container can be inserted into the opening area for liquid filling.

10. The battery formation vacuum exhaust system according to claim 9, characterized in that: The liquid injection connector of the liquid injection container includes a connecting tube body and symmetrically arranged clamping grooves on the side wall of the connecting tube body; The snap-fit ​​opening device includes at least two sets of symmetrically arranged elastic snap-fit ​​parts; The movable sealing members in the symmetrically arranged snap-fit ​​opening device can dock with each other to form a seal on the opening area; The movable sealing member corresponds to the clamping groove and can be clamped in the corresponding clamping groove.

Images