Battery cell extrusion mechanism, battery cell activation device and battery production line

Abstract

The utility model provides a battery cell extrusion mechanism, a battery cell activation device and a battery production line, and relates to the technical field of battery production, the battery cell extrusion mechanism comprises a first air bag assembly, a second air bag assembly and a fluid driving assembly; the first air bag assembly comprises a first air bag and a first flow guide part. The first flow guide piece is connected and communicated with the first air bag and the fluid driving assembly and is provided with a hanger type flow channel; the second air bag assembly comprises a second air bag and a second flow guide part; the second flow guide piece is connected and communicated with the second air bag and the fluid driving assembly and is provided with a hanger type flow channel; the first airbag and the second airbag are oppositely arranged, and a station for placing a battery cell is arranged between the two airbags; the fluid driving assembly is configured to control the first air bag and the second air bag to synchronously expand or contract, so that the first air bag and the second air bag jointly extrude the battery cell. Therefore, the expansion uniformity of the first air bag and the second air bag can be improved by utilizing the hanger type flow channel, so that the extrusion effect of the first air bag and the second air bag on the battery cell is improved.

Description

Technical Field

[0001] This application relates to the technical field of battery production, and in particular to a cell extrusion mechanism, a cell activation device, and a battery production line. Background Technology

[0002] In the battery cell manufacturing process, extrusion equipment is typically used to compress the cells to improve their electrochemical performance, thereby promoting chemical reactions among the cell's components. However, existing extrusion equipment suffers from poor extrusion efficiency, which significantly impacts battery cell production efficiency and yield. Utility Model Content

[0003] This application provides a cell extrusion mechanism, a cell activation device, and a battery production line, aiming to solve the problem of poor extrusion effect in existing cell extrusion devices.

[0004] To address the aforementioned problems, this application provides a battery cell extrusion mechanism, comprising: a first airbag assembly, a second airbag assembly, and a fluid drive assembly; the first airbag assembly includes: a first airbag and a first flow guide; the first flow guide connects and communicates with the first airbag and the fluid drive assembly, and has a coat hanger-type flow channel; the second airbag assembly includes: a second airbag and a second flow guide; the second flow guide connects and communicates with the second airbag and the fluid drive assembly, and has a coat hanger-type flow channel; the first airbag and the second airbag are arranged opposite to each other, and a station for placing the battery cell is provided between the first airbag and the second airbag; the fluid drive assembly is configured to control the first airbag and the second airbag to expand or contract synchronously, so that the first airbag and the second airbag jointly extrude the battery cell.

[0005] In the above scheme, by setting the first airbag and the second airbag to be arranged opposite each other, and there is a station for placing the battery cell between the first airbag and the second airbag, and the first airbag and the second airbag are respectively connected and communicated with the fluid drive component through the first flow guide and the second flow guide with the coat hanger-type flow channel, the fluid drive component can control the first airbag and the second airbag to expand evenly to squeeze the battery cell, so as to improve the squeezing effect of the battery cell squeezing mechanism, thereby improving the production efficiency and yield of the battery cell.

[0006] In one embodiment, the first airbag assembly includes a first detection element; the second airbag assembly includes a second detection element; the first detection element is connected to the first airbag and is used to detect the pressure of the first airbag; the second detection element is connected to the second airbag and is used to detect the pressure of the second airbag.

[0007] Therefore, by setting the first detection element and the second detection element to be connected to the first airbag and the second airbag respectively, and being able to detect the pressure of the first airbag and the second airbag squeezing the battery cell respectively, the battery cell squeezing mechanism can adjust the pressure of the first airbag and the second airbag according to the detection results, so as to reduce the pressure difference between the first airbag and the second airbag, thereby reducing the probability of the battery cell being damaged due to excessive pressure difference on both sides.

[0008] In one embodiment, the first flow guide is located on the side of the first airbag away from the battery cell; the second flow guide is located on the side of the second airbag away from the battery cell.

[0009] Therefore, by setting the first flow guide to the side of the first airbag away from the battery cell and the second flow guide to the side of the second airbag away from the battery cell, the first airbag and the second airbag can expand toward the location of the battery cell, so that the first airbag and the second airbag can jointly squeeze the battery cell.

[0010] In one embodiment, the first airbag assembly further includes a first valve; the second airbag assembly further includes a second valve; the first valve is connected to the first flow guide and the fluid drive assembly and is configured to control the on / off state of the first flow guide; the second valve is connected to the second flow guide and the fluid drive assembly and is configured to control the on / off state of the second flow guide.

[0011] Therefore, by setting a first valve to connect the first guide element and the fluid drive assembly, and a second valve to connect the second guide element and the fluid drive assembly, the first valve and the second valve can respectively control the opening and closing of the first guide element and the second guide element to adjust the pressure of the first airbag and the second airbag.

[0012] In one embodiment, the first airbag assembly further includes a first limiting member; the second airbag assembly further includes a second limiting member; the first limiting member is disposed around the periphery of the first airbag and restricts the expansion of the first airbag so that the first airbag expands in the direction closer to the battery cell; the second limiting member is disposed around the periphery of the second airbag and restricts the expansion of the second airbag so that the second airbag expands in the direction closer to the battery cell.

[0013] Therefore, by setting the first limiting member around the periphery of the first airbag and the second limiting member around the periphery of the second airbag, and by setting the first limiting member and the second limiting member to restrict the expansion of the first airbag and the second airbag on the periphery respectively, the first airbag and the second airbag can expand in a concentrated direction close to the battery cell, so as to improve the effect of the first airbag and the second airbag squeezing the battery cell.

[0014] In one embodiment, both the first and second detection elements are barometers.

[0015] Therefore, by setting both the first and second detection devices to be pressure gauges, the first and second detection devices can detect and display the pressure of the first and second airbags, so that production personnel can understand the pressure status of the first and second airbags.

[0016] In one embodiment, the pressure applied by the first airbag and the second airbag toward the battery cell is less than 0.1 kPa.

[0017] Therefore, by setting the pressure applied to the battery cell by the first and second airbags to be below 0.1 kPa, the battery cell can be kept within a safe pressure range, thereby reducing the risk of powder falling off the internal electrode sheets due to excessive pressure.

[0018] In one embodiment, the first airbag and the second airbag can respectively make contact with the large surfaces on opposite sides of the battery cell.

[0019] Therefore, by setting the first airbag and the second airbag to contact the large surfaces on opposite sides of the battery cell, the battery cell can ensure that it has a sufficient pressure-bearing area through the large surfaces, thereby improving the squeezing effect of the first airbag and the second airbag on the battery cell.

[0020] In one embodiment, the fluid drive assembly includes any one of a fan assembly, an air pump assembly, and a liquid pump assembly.

[0021] Therefore, by setting the fluid drive component to include any one of the fan component, air pump component and liquid pump component, the fluid drive component can drive fluids such as gas or liquid to fill or release the first airbag and the second airbag, so as to realize the expansion or contraction of the first airbag and the second airbag.

[0022] In one embodiment, the cell extrusion mechanism further includes an ultrasonic detection component; the ultrasonic detection component is disposed opposite to the cell and configured to scan the cell for ultrasonic imaging.

[0023] Therefore, by setting the ultrasonic detection component relative to the battery cell and enabling it to scan the battery cell for ultrasonic imaging, the battery cell compression mechanism can adjust the compression of the first and second airbags on the battery cell in real time according to the imaging results.

[0024] In one embodiment, the cell compression mechanism further includes: a motion component; the first airbag component and the second airbag component are both connected to the motion component and can be driven by the motion component to move in a direction closer to or farther from each other.

[0025] Therefore, by setting both the first airbag assembly and the second airbag assembly to be connected to the motion assembly and being driven by the motion assembly to move in directions close to or far from each other, the first airbag assembly and the second airbag assembly can move to avoid the battery cell, so as to facilitate the placement or removal of the battery cell.

[0026] This application also provides a cell activation device, which includes the aforementioned cell extrusion mechanism.

[0027] In the above scheme, the cell activation device can use a cell extrusion mechanism with good extrusion effect to extrude the cell during the activation stage of the cell, such as the activation process of impregnation, formation and aging, so as to improve the production efficiency and yield of the cell.

[0028] This application also provides a battery production line, which includes the aforementioned cell activation device.

[0029] In the above scheme, the battery production line can use a cell activation device with high production efficiency and yield to produce batteries, thereby improving battery production efficiency and yield. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0031] Figure 1 This is a top view of the cell extrusion mechanism and the cell disclosed in the embodiments of this application;

[0032] Figure 2 yes Figure 1 A schematic diagram of the structure of the first airbag assembly, the second airbag assembly, and the battery cell;

[0033] Figure 3 yes Figure 2 A schematic diagram of the structure of the first airbag assembly;

[0034] Figure 4 yes Figure 2 A schematic diagram of the structure of the second airbag assembly.

[0035] The attached figures are labeled as follows:

[0036] The battery cell extrusion mechanism 10, first airbag assembly 100, first airbag 110, first detection component 120, first flow guide component 130, first valve 140, first limiting component 150, first part 151, second part 152, second airbag assembly 200, second airbag 210, second detection component 220, second flow guide component 230, second valve 240, second limiting component 250, third part 251, fourth part 252, fluid drive assembly 300, ultrasonic detection assembly 400, motion assembly 500, worktable 600, battery cell 20, large surface 21. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having” and any variations thereof are intended to cover non-exclusive inclusion.

[0039] In the description of the embodiments of this application, the technical terms "first", "second", "third", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0042] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0043] In some technical solutions, to improve the electrochemical performance of battery cells, an extrusion device is typically used during the cell activation stage to extrude the cell, promoting electrochemical reactions in the corresponding components. However, most extrusion devices primarily use a motor-driven pressure plate to extrude the cell. This hard contact method cannot adapt to the outer surface of the cell, leading to uneven stress on the cell. This not only reduces the extrusion effect but also increases the probability of the cell being damaged, significantly impacting production efficiency and yield.

[0044] To address the aforementioned technical problems, the battery cell extrusion mechanism disclosed in this application provides a first airbag assembly and a second airbag assembly arranged opposite to each other, capable of synchronously expanding or contracting under the control of a fluid drive assembly. Furthermore, a station for placing the battery cell is located between the first airbag assembly and the second airbag assembly, enabling the first airbag assembly and the second airbag assembly to jointly extrude the battery cell after expansion, thereby enhancing the extrusion effect of the battery cell extrusion mechanism and improving the production efficiency and yield of the battery cell.

[0045] Please see Figures 1 to 4 , Figure 1 This is a top view of the cell extrusion mechanism and the cell disclosed in the embodiments of this application. Figure 2 yes Figure 1 A schematic diagram of the structure of the first airbag assembly, the second airbag assembly, and the battery cell. Figure 3 yes Figure 2 A schematic diagram of the structure of the first airbag assembly. Figure 4 yes Figure 2 A schematic diagram of the structure of the second airbag assembly.

[0046] The cell extrusion mechanism 10 disclosed in this application embodiment can be used to extrude the cell 20 to promote electrochemical reactions in the corresponding components of the cell 20. For example... Figures 1 to 2 As shown, the battery cell extrusion mechanism 10 includes a first airbag assembly 100, a second airbag assembly 200, and a fluid drive assembly 300. The first airbag assembly 100 and the second airbag assembly 200 are arranged opposite to each other and are both connected to the fluid drive assembly 300. A station for placing the battery cell is also provided between the first airbag assembly 100 and the second airbag assembly 200. Simultaneously, the fluid drive assembly 300 is configured to control the synchronous expansion or contraction of the first airbag assembly 100 and the second airbag assembly 200, so that the first airbag assembly 100 and the second airbag assembly 200 jointly extrude the battery cell 20.

[0047] The first airbag assembly 100 and the second airbag assembly 200 are arranged opposite to each other and spaced apart, so that there can be a gap between the first airbag assembly 100 and the second airbag assembly 200 to form a workstation for placing the battery cell 20. When the battery cell 20 is placed in the aforementioned workstation, the first airbag assembly 100 and the second airbag assembly 200 can be located on opposite sides of the battery cell 20, respectively.

[0048] The fluid drive component 300 is connected to the first airbag component 100 and the second airbag component 200 respectively, and can drive fluid to flow into the first airbag component 100 and the second airbag component 200, and drive fluid to flow out of the first airbag component 100 and the second airbag component 200, so that the first airbag component 100 and the second airbag component 200 can expand or contract synchronously, so as to jointly squeeze the battery cell 20 after expansion.

[0049] In this embodiment, the fluid drive component 300 can operate according to a preset pulse signal and can control the first airbag component 100 and the second airbag component 200 to expand multiple times, so that the first airbag component 100 and the second airbag component 200 can repeatedly squeeze the battery cell 20 to promote the chemical reaction of the corresponding components of the battery cell 20, thereby improving the electrochemical performance of the battery cell 20.

[0050] In the above scheme, by setting the first airbag assembly 100 and the second airbag assembly 200 to be arranged opposite each other, and being able to expand or contract synchronously under the control of the fluid drive assembly 300, and having a station for placing the battery cell 20 between the first airbag assembly 100 and the second airbag assembly 200, the first airbag assembly 100 and the second airbag assembly 200 can jointly squeeze the battery cell 20 after expansion, so as to improve the squeezing effect of the battery cell squeezing mechanism 10, thereby improving the production efficiency and yield of the battery cell 20.

[0051] like Figures 3 to 4 As shown, the first airbag assembly 100 includes a first airbag 110 and a first detection element 120, and the second airbag assembly 200 includes a second airbag 210 and a second detection element 220. The first airbag 110 and the second airbag 210 are disposed opposite to each other and are both connected to the fluid drive assembly 300, with a station for placing the battery cell 20 between them. The first detection element 120 is connected to the first airbag 110 and is used to detect the pressure of the first airbag 110. The second detection element 220 is connected to the second airbag 210 and is used to detect the pressure of the second airbag 210.

[0052] The first airbag 110 and the second airbag 210 can be arranged opposite to each other and spaced apart, so that there can be a gap between the first airbag 110 and the second airbag 210 to form a workstation for placing the battery cell 20. When the battery cell 20 is placed in the aforementioned workstation, the first airbag 110 and the second airbag 210 can be located on opposite sides of the battery cell 20, respectively.

[0053] Both the first airbag 110 and the second airbag 210 can be connected and communicated with the fluid drive component 300. Both the first airbag 110 and the second airbag 210 can be made of elastic materials such as rubber and can have cavities to contain fluid. This allows the first airbag 110 and the second airbag 210 to expand or contract under the control of the fluid drive component 300, so that they can jointly squeeze the battery cell 20 after expansion, thereby promoting the electrochemical reaction of the corresponding components of the battery cell 20.

[0054] The first detection element 120 and the second detection element 220 are respectively connected to the first airbag 110 and the second airbag 210, and are used to detect the pressure of the first airbag 110 and the second airbag 210 on the battery cell 20. This allows the battery cell compression mechanism 10 to adjust the pressure of the first airbag 110 and the second airbag 210 according to the detection results, so as to adjust the pressure of the first airbag 110 and the second airbag 210 on the battery cell 20 to be more consistent, thereby improving the pressure balance on both sides of the battery cell 20.

[0055] In the above scheme, by setting the first detection element 120 and the second detection element 220 to be connected to the first airbag 110 and the second airbag 210 respectively, the pressure of the first airbag 110 and the second airbag 210 on the battery cell 20 can be detected respectively. This allows the battery cell compression mechanism 10 to adjust the pressure of the first airbag 110 and the second airbag 210 according to the detection results, so as to reduce the pressure difference between the first airbag 110 and the second airbag 210. This helps to reduce the probability of the battery cell 20 being displaced or damaged due to inconsistent pressure on opposite sides.

[0056] To facilitate the compression of the battery cell 20, the first airbag 110 and the second airbag 210 can respectively contact the large surfaces 21 on opposite sides of the battery cell 20, and can respectively apply pressure to the large surfaces 21 on opposite sides of the battery cell 20 to jointly compress the battery cell 20. The first airbag 110 and the second airbag 210 can contact the bottom of the large surface 21, and can apply pressure to the bottom of the large surface 21 to compress the battery cell 20, ensuring that other areas of the large surface 21, except for the bottom, are not obstructed, thus facilitating ultrasonic testing of the battery cell 20 during the compression process.

[0057] In the above scheme, by setting the first airbag 110 and the second airbag 210 to contact the large surfaces 21 on opposite sides of the battery cell 20 respectively, the battery cell 20 can ensure that it has sufficient pressure area through the large surfaces 21, so as to improve the squeezing effect of the first airbag 110 and the second airbag 210 on the battery cell 20.

[0058] To reduce the probability of the battery cell 20 being damaged by pressure, the pressure applied by the first airbag 110 and the second airbag 210 towards the battery cell 20 can be maintained below 0.1 kPa. Specifically, the pressure applied by the first airbag 110 and the second airbag 210 towards the battery cell 20 can be 0.05 kPa, 0.06 kPa, 0.08 kPa, or 0.1 kPa, etc. Of course, the pressure applied by the first airbag 110 and the second airbag 210 can also be adjusted according to the actual size of the battery cell 20; this embodiment will not list all possible adjustments.

[0059] In the above scheme, by setting the pressure applied by the first airbag 110 and the second airbag 210 toward the battery cell 20 to be below 0.1 kPa, the battery cell 20 can be kept within a safe pressure range, thereby reducing the risk of powder falling off the internal electrode sheets of the battery cell 20 due to excessive pressure.

[0060] like Figures 3 to 4 As shown, the first airbag assembly 100 further includes a first flow guide 130; the second airbag assembly 200 further includes a second flow guide 230. The first flow guide 130 connects and communicates with the first airbag 110 and the fluid drive assembly 300, and is located on the side of the first airbag 110 opposite to the battery cell 20. The second flow guide 230 connects and communicates with the second airbag 210 and the fluid drive assembly 300, and is located on the side of the second airbag 210 opposite to the battery cell 20.

[0061] The first guide member 130 can connect and communicate with the first airbag 110 and the fluid drive assembly 300, allowing the fluid driven by the fluid drive assembly 300 to flow into or out of the first airbag 110 through the first guide member 130, thereby expanding or contracting the first airbag 110. Similarly, the second guide member 230 can connect and communicate with the second airbag 210 and the fluid drive assembly 300, allowing the fluid driven by the fluid drive assembly 300 to flow into or out of the second airbag 210 through the second guide member 230, thereby expanding or contracting the second airbag 210. Both the first guide member 130 and the second guide member 230 have flow channels to transport the fluid driven by the fluid drive assembly 300.

[0062] The first flow guide 130 is also located on the side of the first airbag 110 facing away from the battery cell 20, and can be spaced apart from the battery cell 20 to form a space between the first flow guide 130 and the battery cell 20 to accommodate the first airbag 110, thereby facilitating the expansion or contraction of the first airbag 110. The distance between the first flow guide 130 and the battery cell 20 can be adjusted according to the actual size of the battery cell 20 to ensure that the first airbag 110, matching the size of the battery cell 20, can expand into its proper position, thereby improving the effect of the first airbag 110 in compressing the battery cell 20.

[0063] The second flow guide 230 is also located on the side of the second airbag 210 opposite to the battery cell 20, and can be spaced apart from the battery cell 20 to form a space between the second flow guide 230 and the battery cell 20 to accommodate the second airbag 210, thereby facilitating the expansion or contraction of the second airbag 210. The distance between the second flow guide 230 and the battery cell 20 can also be adjusted according to the actual size of the battery cell 20 to ensure that the second airbag 210, matching the size of the battery cell 20, can expand into its proper position, thereby improving the effect of the second airbag 210 in compressing the battery cell 20.

[0064] In the above scheme, by setting the first flow guide 130 to connect and communicate with the first airbag 110 and the fluid drive component 300, and the second flow guide 230 to connect and communicate with the second airbag 210 and the fluid drive component 300, the first flow guide 130 and the second flow guide 230 can respectively introduce fluid into the first airbag 110 and the second airbag 210, and respectively discharge fluid from the first airbag 110 and the second airbag 210, so as to realize the expansion or contraction of the first airbag 110 and the second airbag 210.

[0065] like Figures 3 to 4 As shown, in order to improve the expansion uniformity of the first airbag 110 and the second airbag 210, both the first guide member 130 and the second guide member 230 have coat hanger-type flow channels.

[0066] The two ends of the first flow guide 130 can be connected and communicated with the first airbag 110 and the fluid drive assembly 300 respectively. The end of the first flow guide 130 connected to the first airbag 110 can have a coat hanger-type flow channel. The coat hanger-type flow channel can uniformly distribute the fluid flowing into the first airbag 110, so that the fluid can maintain a uniform flow into the first airbag 110, thereby improving the expansion uniformity of the first airbag 110.

[0067] The two ends of the second flow guide 230 can be connected and communicated with the second airbag 210 and the fluid drive assembly 300 respectively. The end of the second flow guide 230 connected to the second airbag 210 can have a coat hanger-type flow channel, which can uniformly distribute the fluid flowing into the second airbag 210, so that the fluid can maintain a uniform flow into the second airbag 210, thereby improving the expansion uniformity of the second airbag 210.

[0068] The coat hanger-style flow channel, through its unique tapered distribution manifold and precisely calculated flow resistance balance design, improves the consistency of fluid pressure and velocity across all flow paths. This allows the fluid to flow uniformly into the airbag, enhancing the uniformity of airbag expansion. Consequently, as the uniformity of airbag expansion increases, the pressure on the surface of the battery cell 20 in contact with the airbag also remains highly uniform. This enables the airbag to apply a uniform surface force to the battery cell 20, rather than an unevenly distributed diffuse force, which helps to improve the effectiveness of the airbag in compressing the battery cell 20.

[0069] In other words, uniformly distributed pressure means that every unit area of ​​the battery cell 20 can become an effective load-bearing point and contribute collectively to the compression deformation, allowing the airbag to generate a larger torque to enhance the compression effect on the battery cell 20. Simultaneously, uniformly distributed pressure also avoids pressure concentration at localized weak points in the battery cell 20, reducing the probability of damage. This is particularly important for achieving higher energy density and thinner, larger battery cells 20. Furthermore, uniformly distributed pressure also improves the consistency and controllability of the battery cell 20's deformation, allowing production personnel to precisely adjust the expansion or contraction of the airbag to achieve an ideal cycle of compression to relaxation, thereby promoting electrochemical reactions in the corresponding components of the battery cell 20.

[0070] In the above scheme, by setting the first flow guide 130 and the second flow guide 230 to both have coat hanger-type flow channels, the first flow guide 130 and the second flow guide 230 can also play the role of equalizing flow, so as to uniformly introduce the fluid into the first airbag 110 and the second airbag 210 respectively. This helps to improve the uniformity of the expansion of the first airbag 110 and the second airbag 210, thereby applying uniform pressure to the battery cell 20.

[0071] Understandably, the above descriptions of "airbag", "first airbag" and "second airbag" are only for the purpose of distinguishing them in terms of quantity. In fact, "airbag" can also be called "first airbag" or "second airbag", and "first airbag" can also be called "second airbag", and "second airbag" can also be called "first airbag".

[0072] like Figures 3 to 4 As shown, the first airbag assembly 100 further includes a first valve 140; the second airbag assembly 200 further includes a second valve 240. The first valve 140 is connected to the first flow guide 130 and the fluid drive assembly 300, and is configured to control the on / off state of the first flow guide 130. The second valve 240 is connected to the second flow guide 230 and the fluid drive assembly 300, and is configured to control the on / off state of the second flow guide 230.

[0073] The first valve 140 and the second valve 240 can be solenoid valves, and the first valve 140 and the second valve 240 can control the opening and closing of the first guide member 130 and the second guide member 230 respectively, so that the cell extrusion mechanism 10 can adjust the pressure of the first airbag 110 and the second airbag 210 respectively through the first valve 140 and the second valve 240, so as to adjust the pressure of the first airbag 110 and the second airbag 210 acting on the cell 20 to be closer to the same.

[0074] In the above scheme, by setting a first valve 140 to connect the first guide member 130 and the fluid drive assembly 300, and a second valve 240 to connect the second guide member 230 and the fluid drive assembly 300, the first valve 140 and the second valve 240 can respectively control the on / off state between the first guide member 130 and the second guide member 230 to adjust the pressure of the first airbag 110 and the second airbag 210.

[0075] like Figures 3 to 4 As shown, the first airbag assembly 100 further includes a first limiting member 150; the second airbag assembly 200 further includes a second limiting member 250. The first limiting member 150 is disposed around the periphery of the first airbag 110 and restricts the expansion of the first airbag 110 so that the first airbag 110 expands in the direction closer to the battery cell 20. The second limiting member 250 is disposed around the periphery of the second airbag 210 and restricts the expansion of the second airbag 210 so that the second airbag 210 expands in the direction closer to the battery cell 20.

[0076] The first limiting member 150 is arranged around the periphery of the first airbag 110 and can restrain the expansion of the first airbag 110 on the periphery, so that the first airbag 110 can concentrate its expansion in the unrestrained direction, that is, in the direction close to the battery cell 20, so as to squeeze the battery cell 20 in the direction close to the battery cell 20, thereby improving the squeezing effect of the first airbag 110.

[0077] For example, the first limiting member 150 may include a first part 151 and a second part 152. The first part 151 and the second part 152 can be attached together by screws and can jointly enclose the space forming the first airbag 110, so that the first limiting member 150 can be arranged around the periphery of the first airbag 110 to restrain the first airbag 110 on the periphery.

[0078] In some embodiments, the first portion 151 and the second portion 152 may also be connected in other detachable or non-detachable ways. In some embodiments, the first portion 151 and the second portion 152 may also be an integral structure, as long as the first portion 151 and the second portion 152 can form a space to accommodate the first airbag 110.

[0079] The second limiting member 250 is arranged around the periphery of the second airbag 210 and can restrain the expansion of the second airbag 210 on the periphery, so that the second airbag 210 can concentrate its expansion in the unrestrained direction, that is, in the direction close to the battery cell 20, so as to squeeze the battery cell 20 in the direction close to the battery cell 20, thereby improving the squeezing effect of the second airbag 210.

[0080] For example, the second limiting member 250 may include a third part 251 and a fourth part 252. The third part 251 and the fourth part 252 can be fastened together by screws and can jointly enclose the space forming the second airbag 210, so that the second limiting member 250 can be arranged around the periphery of the second airbag 210 to restrain the second airbag 210 on the periphery.

[0081] In some embodiments, the third portion 251 and the fourth portion 252 may also be connected in other detachable or non-detachable ways. In some embodiments, the third portion 251 and the fourth portion 252 may also be an integral structure, as long as the third portion 251 and the fourth portion 252 can enclose a space to accommodate the second airbag 210.

[0082] In the above scheme, by setting the first limiting member 150 around the periphery of the first airbag 110 and the second limiting member 250 around the periphery of the second airbag 210, the first limiting member 150 and the second limiting member 250 can respectively limit the expansion of the first airbag 110 and the second airbag 210 on the periphery, so that the first airbag 110 and the second airbag 210 can expand in a concentrated direction close to the battery cell 20, thereby improving the effect of the first airbag 110 and the second airbag 210 squeezing the battery cell 20.

[0083] like Figures 3 to 4 As shown, the first detection element 120 and the second detection element 220 are both pressure gauges, which enable the first detection element 120 and the second detection element 220 to not only detect the pressure of the first airbag 110 and the second airbag 210 respectively, but also to display the corresponding pressure values ​​for production personnel to view, so that production personnel can understand the status of the first airbag 110 and the second airbag 210 in real time.

[0084] To fix the position of the first detection element 120, the first detection element 120 can also be connected to the first limiting element 150, so that the first limiting element 150 can fix the first detection element 120, thereby facilitating the production personnel to inspect the first detection element 120. The first detection element 120 can be inserted into the first part 151 and fixed to the first part 151.

[0085] To fix the position of the second detection element 220, the second detection element 220 can also be disposed on the side of the second limiting member 250 opposite to the second airbag 210, so that the second limiting member 250 can be used to fix the second detection element 220, thereby facilitating the production personnel to inspect the second detection element 220. The second detection element 220 can be inserted into the third part 251 and fixed to the third part 251.

[0086] In the above scheme, by setting the first detection element 120 and the second detection element 220 to be both pressure gauges, the first detection element 120 and the second detection element 220 can detect and display the pressure of the first airbag 110 and the second airbag 210, so that production personnel can understand the pressure status of the first airbag 110 and the second airbag 210.

[0087] In some embodiments, in addition to the barometer, the first detection element 120 and the second detection element 220 can also be other devices with pressure detection functions, as long as they can detect the pressure of the first airbag 110 and the second airbag 210. This embodiment will not list them one by one.

[0088] In order to drive fluid into or out of the first airbag 110 and the second airbag 210, the fluid drive assembly 300 may include any one of a fan assembly, an air pump assembly, and a liquid pump assembly.

[0089] When the fluid drive assembly 300 is a fan assembly or an air pump assembly, the fluid drive assembly 300 can drive gas to flow into or out of the first airbag 110 and the second airbag 210, so that the first airbag 110 and the second airbag 210 expand or contract synchronously. When the fluid drive assembly 300 is a liquid pump assembly, the fluid drive assembly 300 can drive liquid to flow into or out of the first airbag 110 and the second airbag 210, so that the first airbag 110 and the second airbag 210 expand or contract synchronously.

[0090] In the above scheme, by setting the fluid drive component 300 to include any one of the fan component, air pump component and liquid pump component, the fluid drive component 300 can drive fluids such as gas or liquid to fill or release the first airbag 110 and the second airbag 210, so as to realize the synchronous expansion or contraction of the first airbag 110 and the second airbag 210.

[0091] In some embodiments, in addition to the fan assembly, air pump assembly or liquid pump assembly described above, the fluid drive assembly 300 may also be other drive structures capable of driving fluid flow, which will not be listed and described in this embodiment.

[0092] In some embodiments, the number of fluid drive components 300 may also be two, and the two fluid drive components 300 may be connected and communicated with the first airbag 110 and the second airbag 210 respectively, so as to control the expansion or contraction of the first airbag 110 and the second airbag 210 respectively, which helps to improve the independence of the first airbag 110 and the second airbag 210.

[0093] like Figure 1 As shown, in order to confirm the state of the battery cell 20, the battery cell compression mechanism 10 may further include an ultrasonic detection component 400. The ultrasonic detection component 400 is disposed opposite to the battery cell 20 and is configured to scan the battery cell 20 for ultrasonic imaging, so as to determine whether the battery cell 20 has completed the corresponding electrochemical reaction based on the imaging results, thereby adjusting the compression of the battery cell 20 by the first airbag 110 and the second airbag 210 in real time.

[0094] In some embodiments, the ultrasonic detection component 400 may be omitted to determine whether the cell 20 has completed the corresponding electrochemical reaction by means of a preset compression time.

[0095] In some embodiments, to facilitate the removal or placement of the battery cell 20, the battery cell pressing mechanism 10 further includes a motion component 500. For example... Figure 1 As shown, both the first airbag assembly 100 and the second airbag assembly 200 are connected to the motion assembly 500 and can be driven by the motion assembly 500 to move in a direction closer to or farther from each other.

[0096] The motion component 500 can specifically be a combination of a motor and a lead screw, while the first airbag component 100 and the second airbag component 200 can be connected to the positive and negative threads of the lead screw respectively, so that the motion component 500 can drive the first airbag component 100 and the second airbag component 200 to move synchronously in the direction of approaching or moving away from each other, so as to expand or shrink the space between the first airbag component 100 and the second airbag component 200.

[0097] When it is necessary to place the battery cell 20 at the work station between the first airbag assembly 100 and the second airbag assembly 200, the motion component 500 can drive the first airbag assembly 100 and the second airbag assembly 200 to move in a direction away from each other, so as to expand the space between the first airbag assembly 100 and the second airbag assembly 200, thereby facilitating the placement of the battery cell 20 at the work station.

[0098] After the battery cell 20 is placed on the work station, the motion component 500 can drive the first airbag component 100 and the second airbag component 200 to move in a direction closer to each other, so as to reduce the gap between the first airbag component 100 and the second airbag component 200, thereby facilitating the first airbag component 100 and the second airbag component 200 to squeeze the battery cell 20.

[0099] After the battery cell 20 is squeezed, the motion component 500 can drive the first airbag component 100 and the second airbag component 200 to move in a direction away from each other, so as to expand the space between the first airbag component 100 and the second airbag component 200, thereby making it easier to remove the battery cell 20.

[0100] In some embodiments, the motion component 500 may also be other similar drive structures, such as cylinders, as long as the motion component 500 can drive the first airbag component 100 and the second airbag component 200 to move in a direction closer to or further away from each other. This embodiment will not list them one by one.

[0101] In the above scheme, by setting the first airbag assembly 100 and the second airbag assembly 200 to be connected to the motion assembly 500 and being driven by the motion assembly 500 to move in a direction close to or away from each other, the first airbag assembly 100 and the second airbag assembly 200 can move to avoid the battery cell 20, so as to place or remove the battery cell 20.

[0102] In some embodiments, such as Figure 1 As shown, the cell extrusion mechanism 10 may further include a worktable 600, and the aforementioned first airbag assembly 100, second airbag assembly 200, fluid drive assembly 300, ultrasonic detection assembly 400 and motion assembly 500 may all be disposed on the worktable 600, and a work station for placing the cell 20 may be formed on the worktable 600.

[0103] In some embodiments, the cell extrusion mechanism 10 may further include a processing unit electrically connected to a first airbag assembly 100, a second airbag assembly 200, a fluid drive assembly 300, an ultrasonic detection assembly 400, and a motion assembly 500, so as to realize closed-loop control of the cell extrusion mechanism 10.

[0104] This application also discloses a cell activation device, which may include the cell extrusion mechanism 10 described in the above embodiments. The cell activation device can be applied to at least one of the activation processes of the cell 20, such as impregnation, formation, and aging. The cell activation device may also include other functional mechanisms required for the corresponding processes, such as a liquid injection mechanism in the impregnation process or a gas collection mechanism in the formation process, etc., which will not be listed in detail in this embodiment.

[0105] When the cell activation device is applied to the impregnation process of cell 20, the cell extrusion mechanism 10 can repeatedly extrude the cell 20 after the electrolyte injection is completed, in order to improve the impregnation efficiency of the cell 20 and / or optimize the contact interface between the electrodes of the cell 20. Alternatively, when the cell activation device is applied to the formation or aging process of cell 20, the cell activation device can also use the cell extrusion mechanism 10 to repeatedly extrude the cell 20, in order to assist in the degassing and flow equalization of the cell 20.

[0106] In the above scheme, the cell activation device can use the cell extrusion mechanism 10 with good extrusion effect to extrude the cell 20 in the activation stage of the cell 20, such as in the activation process of soaking, formation and aging, so as to improve the production efficiency and yield of the cell 20.

[0107] This application also discloses a battery production line, which may include the aforementioned cell activation device. Of course, in addition to the cell activation device, the battery production line may also include a device for pre-processing the cell 20 and a device for post-processing the cell 20. For example, a device for pre-processing the stacked and wound electrodes and separators to form the cell 20, and a device for post-processing the flattened cell 20 into a casing, etc., will not be listed in detail here.

[0108] In the above scheme, the battery production line can use a cell activation device with high production efficiency and yield to produce batteries, thereby improving battery production efficiency and yield.

[0109] Finally, in some specific application scenarios, to address the problem of poor extrusion effect in existing battery cell extrusion devices, the battery cell extrusion mechanism 10 disclosed in this application embodiment may include: a first airbag assembly 100, a second airbag assembly 200, and a fluid drive assembly 300. The first airbag assembly 100 and the second airbag assembly 200 are arranged opposite to each other and are both connected to the fluid drive assembly 300, and a station for placing the battery cell is provided between the first airbag assembly 100 and the second airbag assembly 200. Simultaneously, the fluid drive assembly 300 is configured to control the synchronous expansion or contraction of the first airbag assembly 100 and the second airbag assembly 200, so that the first airbag assembly 100 and the second airbag assembly 200 jointly extrude the battery cell 20.

[0110] The first airbag assembly 100 includes a first airbag 110 and a first detection element 120, and the second airbag assembly 200 includes a second airbag 210 and a second detection element 220. The first airbag 110 and the second airbag 210 are disposed opposite to each other and are both connected to the fluid drive assembly 300, with a station for placing the battery cell 20 between them. The first detection element 120 is connected to the first airbag 110 and is used to detect the pressure of the first airbag 110. The second detection element 220 is connected to the second airbag 210 and is used to detect the pressure of the second airbag 210. Furthermore, the first airbag 110 and the second airbag 210 can respectively contact the large surfaces 21 on opposite sides of the battery cell 20, and the pressure applied by the first airbag 110 and the second airbag 210 towards the battery cell 20 can be maintained below 0.1 kPa.

[0111] The first airbag assembly 100 further includes a first flow guide 130; the second airbag assembly 200 further includes a second flow guide 230. The first flow guide 130 connects and communicates with the first airbag 110 and the fluid drive assembly 300, and is located on the side of the first airbag 110 facing away from the battery cell 20. The second flow guide 230 connects and communicates with the second airbag 210 and the fluid drive assembly 300, and is located on the side of the second airbag 210 facing away from the battery cell 20. Both the first flow guide 130 and the second flow guide 230 have a coat hanger-shaped flow channel.

[0112] The first airbag assembly 100 further includes a first valve 140; the second airbag assembly 200 further includes a second valve 240. The first valve 140 is connected to the first flow guide 130 and the fluid drive assembly 300, and is configured to control the on / off state of the first flow guide 130. The second valve 240 is connected to the second flow guide 230 and the fluid drive assembly 300, and is configured to control the on / off state of the second flow guide 230.

[0113] The first airbag assembly 100 further includes a first limiting member 150; the second airbag assembly 200 further includes a second limiting member 250. The first limiting member 150 is disposed around the periphery of the first airbag 110 and restricts the expansion of the first airbag 110 so that the first airbag 110 expands in the direction closer to the battery cell 20. The second limiting member 250 is disposed around the periphery of the second airbag 210 and restricts the expansion of the second airbag 210 so that the second airbag 210 expands in the direction closer to the battery cell 20.

[0114] The fluid drive assembly 300 may include any one of a fan assembly, an air pump assembly, and a liquid pump assembly. The cell extrusion mechanism 10 may further include an ultrasonic detection assembly 400. The ultrasonic detection assembly 400 is disposed opposite to the cell 20 and configured to scan the cell 20 for ultrasonic imaging.

[0115] The battery cell extrusion mechanism 10 disclosed in this application embodiment is configured with a first airbag assembly 100 and a second airbag assembly 200 arranged opposite to each other, and can expand or contract synchronously under the control of a fluid drive assembly 300. There is also a station for placing the battery cell 20 between the first airbag assembly 100 and the second airbag assembly 200, so that the first airbag assembly 100 and the second airbag assembly 200 can jointly extrude the battery cell 20 after expansion, thereby improving the extrusion effect of the battery cell extrusion mechanism 10 and improving the production efficiency and yield of the battery cell 20.

[0116] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A battery cell extrusion mechanism, characterized in that, The cell extrusion mechanism includes: a first airbag assembly, a second airbag assembly, and a fluid drive assembly; The first airbag assembly includes: a first airbag and a first flow guide; the first flow guide connects and communicates the first airbag and the fluid drive assembly, and has a coat hanger-shaped flow channel; The second airbag assembly includes: a second airbag and a second flow guide; the second flow guide connects and communicates with the second airbag and the fluid drive assembly, and has a coat hanger-shaped flow channel; The first airbag and the second airbag are disposed opposite to each other, and there is a station for placing the battery cell between the first airbag and the second airbag; the fluid drive assembly is configured to control the first airbag and the second airbag to expand or contract synchronously, so that the first airbag and the second airbag jointly squeeze the battery cell.

2. The cell extrusion mechanism according to claim 1, characterized in that, The first airbag assembly includes: a first detection element; the second airbag assembly includes: a second detection element; The first detection element is connected to the first airbag and is used to detect the pressure of the first airbag; the second detection element is connected to the second airbag and is used to detect the pressure of the second airbag.

3. The cell extrusion mechanism according to claim 2, characterized in that, The first flow guide is located on the side of the first airbag away from the battery cell; the second flow guide is located on the side of the second airbag away from the battery cell.

4. The cell extrusion mechanism according to claim 3, characterized in that, The first airbag assembly further includes: a first valve; the second airbag assembly further includes: a second valve; The first valve connects the first flow guide and the fluid drive assembly, and is configured to control the on / off state of the first flow guide; The second valve connects the second flow guide and the fluid drive assembly and is configured to control the on / off state of the second flow guide.

5. The cell extrusion mechanism according to claim 2, characterized in that, The first airbag assembly further includes: a first limiting member; the second airbag assembly further includes: a second limiting member; The first limiting member is disposed around the periphery of the first airbag and restricts the expansion of the first airbag so that the first airbag expands in the direction closer to the battery cell; The second limiting member is disposed around the periphery of the second airbag and restricts the expansion of the second airbag so that the second airbag expands in the direction closer to the battery cell.

6. The cell extrusion mechanism according to claim 2, characterized in that, Both the first and second detection components are barometers.

7. The cell extrusion mechanism according to claim 2, characterized in that, The pressure applied by the first airbag and the second airbag toward the battery cell is less than 0.1 kPa.

8. The cell extrusion mechanism according to claim 2, characterized in that, The first airbag and the second airbag can respectively contact the large surfaces on opposite sides of the battery cell.

9. The cell extrusion mechanism according to claim 1, characterized in that, The fluid drive assembly includes any one of a fan assembly, an air pump assembly, and a liquid pump assembly.

10. The cell extrusion mechanism according to claim 1, characterized in that, The cell extrusion mechanism further includes: an ultrasonic testing component; The ultrasonic detection component is disposed opposite to the battery cell and is configured to scan the battery cell for ultrasonic imaging.

11. The cell extrusion mechanism according to claim 1, characterized in that, The cell extrusion mechanism further includes: a motion component; Both the first airbag assembly and the second airbag assembly are connected to the motion assembly and can be driven by the motion assembly to move toward or away from each other.

12. A cell activation device, characterized in that, The cell activation device includes: the cell extrusion mechanism according to any one of claims 1-11.

13. A battery production line, characterized in that, The battery production line includes the cell activation device as described in claim 12.

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