Extrusion device and preparation method thereof, tray and battery production equipment

Abstract

The invention relates to an extrusion device and a preparation method thereof, a tray and battery production equipment. The extrusion device comprises a first part and a second part which are connected. The first part comprises a frame body and a flexible bag skin which are connected, and the flexible bag skin and the second part are connected with the two opposite sides of the frame body respectively and jointly define a bag cavity; the frame body has a first surface deviating from the second component; the flexible bag skin comprises a bag skin body and a protruding part arranged on one side of the bag skin body in a protruding mode, the bag skin body is located on the side, away from the second component, of the frame body and connected with the first surface, and the protruding part extends towards the interior of the frame body or the inner side of the frame body and is connected with the frame body. The extrusion device can reduce the tearing angle between the bag skin body and the first surface, so that the risk of stripping the bag skin body from the first surface is reduced, and the risk of failure of the extrusion device is further reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and particularly relates to an extrusion device and a preparation method thereof, a tray, and a battery production device. Background Art

[0002] In some production processes of battery cells, it is necessary to pressurize the battery cells. Related technologies provide an airbag structure as an extrusion device to extrude the battery cells. This airbag structure includes a metal frame and flexible skins bonded to both sides of the metal frame. During the use of this airbag structure, as the airbag structure expands, the flexible skin is prone to tearing and separating from the metal frame, resulting in failure. Summary of the Invention

[0003] Embodiments of the present application provide an extrusion device and a preparation method thereof, a tray, and a battery production device to improve the technical problem that the extrusion device is prone to failure.

[0004] To achieve the above object, according to the first aspect of the present application, an extrusion device is provided, including a first component and a second component connected to each other; the first component includes a frame and a flexible bladder connected to each other, the flexible bladder and the second component are respectively connected to opposite sides of the frame and jointly define a bladder cavity; the frame has a first surface facing away from the second component; the flexible bladder includes a bladder body and a protrusion protruding from one side of the bladder body, the bladder body is located on the side of the frame facing away from the second component and is connected to the first surface, and the protrusion extends into the frame or the inner side of the frame and is connected to the frame.

[0005] Optionally, the frame has a second surface corresponding to the bladder cavity; the protrusion includes a first protrusion, and the first protrusion extends into the bladder cavity and is connected to the second surface.

[0006] Optionally, the second surface is partially concave to form a third receiving groove on the frame, and a part of the first protrusion is embedded in the third receiving groove.

[0007] Optionally, the first surface is partially concave to form a second receiving groove on the frame, the protrusion includes a second protrusion, and the second protrusion extends into the second receiving groove and is connected to the frame.

[0008] Optionally, the first component further includes a reinforcing frame, the reinforcing frame is located in the bladder cavity, the reinforcing frame has at least two independent connection ends, and the connection ends are connected to the frame.

[0009] Optionally, the reinforcing frame includes a cross beam extending in a first direction, and opposite ends of the cross beam are respectively formed as the connecting ends and connected to the second surface; the reinforcing frame further includes a longitudinal beam extending in a second direction, the second direction intersects the first direction, opposite ends of the longitudinal beam are respectively connected to the cross beam and the second surface, and one end of the longitudinal beam connected to the second surface is formed as the connecting end.

[0010] Optionally, the connecting end is connected to the second surface, a side surface of the connecting end facing the bladder body is concave and jointly defines a first receiving groove with the second surface. When the protruding portion includes a first protruding portion, a part of the first protruding portion extends into the first receiving groove and is connected to the reinforcing frame and the second surface.

[0011] Optionally, the thickness of the bladder body is 1 mm to 5 mm; and / or, the thickness of the protruding portion is 1 mm to 3 mm; and / or, the frame is a metal structure; and / or, the flexible bladder is an elastic plastic structure; and / or, the bladder body is bonded to the first surface; and / or, the protruding portion is bonded to the frame.

[0012] Optionally, the pressing device further includes an adhesive layer, and the adhesive layer is disposed between the second component and the frame and bonds the second component and the frame together.

[0013] Optionally, both the flexible bladder and the adhesive layer include a vulcanized plastic structure.

[0014] Optionally, the second component has the same structure as the first component, and the second component is disposed opposite to the first component; and / or,

[0015] The pressing device further includes a valve body disposed outside the bladder cavity, at least one of the first component and the second component is provided with a fluid passage communicating with the bladder cavity, and the valve body is connected to at least one of the first component and the second component and communicates with the fluid passage.

[0016] According to a second aspect of the present application, there is provided a method for manufacturing a pressing device, including:

[0017] Providing a frame, one side surface of the frame in the thickness direction is a first surface;

[0018] Preparing a flexible bladder on one side of the frame to obtain a first component; wherein, the flexible bladder (including a bladder body and a protruding portion protruding from one side of the bladder body, the bladder body is located on one side of the frame and connected to the first surface, and the protruding portion extends towards the inside or the inner side of the frame and is connected to the frame;

[0019] A second component is provided and is disposed on a side of the housing away from the flexible bladder and connected to the housing. The second component, the housing, and the flexible bladder jointly define a bladder cavity, thereby obtaining an extrusion device.

[0020] Optionally, the preparation process of the first component includes: placing a first raw rubber piece on the housing, subjecting the first raw rubber piece to vulcanization treatment to obtain a flexible bladder, and bonding the flexible bladder to the housing to obtain the first component.

[0021] Optionally, the step of disposing the second component on a side of the housing away from the flexible bladder and connecting it to the housing includes: disposing a second raw rubber piece between the second component and the housing, subjecting the second raw rubber piece to vulcanization treatment to obtain an adhesive layer, and bonding the second component and the housing together with the adhesive layer.

[0022] According to a third aspect of the present application, a tray is provided, which includes a tray body and an extrusion device obtained by the above extrusion device or the preparation method of the above extrusion device, and the extrusion device is disposed on the tray body.

[0023] According to a fourth aspect of the present application, a battery production device is provided, which includes the above tray.

[0024] In the extrusion device provided by the embodiment of the present application, the flexible bladder is provided to include a bladder body and a protrusion. The protrusion extends into or towards the inside of the housing and is connected to the housing. Thus, when the pressure in the bladder cavity increases and the bladder body is subjected to a thrust force in a direction away from the housing, the protrusion will apply a pulling force to the bladder body in a direction towards the housing. This pulling force can, to a certain extent, offset the above-mentioned thrust force, reduce the tearing angle between the bladder body and the first surface, thereby reducing the risk of the bladder body peeling off from the first surface, and further reducing the risk of the extrusion device failing.

[0025] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] In order to more fully understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, where the same reference numerals in the following description represent the same parts.

[0028] Figure 1 is a perspective structural view of an extrusion device provided by an embodiment of the present application;

[0029] Figure 2 is a front view structural view of an extrusion device provided by an embodiment of the present application;

[0030] Figure 3 is an internal sectional structural view of an extrusion device provided by an embodiment of the present application Figure 1 ;

[0031] Figure 4 is Figure 3 an enlarged structural view of part A in

[0032] Figure 5 is Figure 3 a sectional structural view in the H-H direction of

[0033] Figure 6 is Figure 5 an enlarged structural view of part B in

[0034] Figure 7 is a side view structural view of an extrusion device provided by an embodiment of the present application;

[0035] Figure 8 is a side view structural view of another extrusion device provided by an embodiment of the present application;

[0036] Figure 9 is an internal sectional structural view of an extrusion device provided by an embodiment of the present application Figure 2 ;

[0037] Figure 10 is Figure 9 an enlarged structural view of part C in

[0038] Figure 11 is an enlarged structural view of part C corresponding to another extrusion device provided by an embodiment of the present application Figure 9 in

[0039] Figure 12 is a perspective structural view of the first component in an extrusion device provided by an embodiment of the present application;

[0040] Figure 13 is a front view structural view of the first mold provided by an embodiment of the present application;

[0041] Figure 14 is Figure 13 a sectional structural view in the G-G direction of

[0042] Figure 15 is that the first component is located in Figure 13Schematic cross-sectional structure diagram inside the first mold;

[0043] Figure 16 is a schematic top view structure diagram of the tray provided by an embodiment of the present application;

[0044] Figure 17 is a schematic structure diagram of the battery production equipment provided by an embodiment of the present application.

[0045] Explanation of reference numerals:

[0046] 10. Extrusion device;

[0047] 1. First component;

[0048] 11. Frame body; 110. Through hole; 111. First surface; 112. Second surface; 113. Second receiving groove; 114. Third surface; 115. Fourth surface; 116. Third receiving groove;

[0049] 12. Flexible bladder; 121. Bladder body; 122. Protrusion; 1221. First protrusion; 1222. Second protrusion;

[0050] 13. Reinforcing frame; 130. Connection end; 131. Cross beam; 132. Longitudinal beam; 133. First receiving groove;

[0051] 2. Second component;

[0052] 3. Bladder cavity;

[0053] 4. Adhesive layer;

[0054] 5. Valve body;

[0055] 6. Fluid passage;

[0056] 100. Tray; 101. Tray body;

[0057] 200. First mold; 210. Lower mold; 211. Mold body; 212. Boss; 213. Avoidance groove; 220. Upper mold; 230. First cavity;

[0058] 1000. Battery production equipment. Detailed implementation manners

[0059] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present application.

[0060] In the first aspect, please refer toFigures 1 to 12 , an embodiment of the present application provides an extrusion device 10. The extrusion device 10 includes a connected first component 1 and a second component 2; the first component 1 includes a connected frame body 11 and a flexible skin 12, the flexible skin 12 and the second component 2 are respectively connected to opposite sides of the frame body 11 and jointly define a bladder cavity 3; the frame body 11 has a first surface 111 facing away from the second component 2; the flexible skin 12 includes a skin body 121 and a convex portion 122 protruding from one side of the skin body 121, the skin body 121 is located on the side of the frame body 11 facing away from the second component 2 and is connected to the first surface 111, and the convex portion 122 extends into or inside the frame body 11 and is connected to the frame body 11.

[0061] The extrusion device 10 provided by the embodiment of the present application can be used to extrude battery cells. Here, the battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium-metal batteries, sodium-metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the embodiment of the present application does not limit this.

[0062] Optionally, the extrusion device 10 can be applied to the production process of battery cells. The production process of battery cells generally includes processes such as stirring, coating, rolling, slitting, assembling, injecting electrolyte, and forming. The extrusion device 10 can be applied to the forming process of battery cells. The forming of battery cells refers to the first charge and discharge process of battery cells after injecting electrolyte. Exemplarily, in lithium-ion battery cells, forming can activate the active substances in the battery cells, activate the lithium-ion batteries, and at the same time, side reactions occur between the lithium salt and the electrolyte, and a solid electrolyte interface (SEI) film is formed on the negative electrode of the battery cells. This layer of film can prevent further side reactions and thus reduce the loss of active lithium in the battery cells. During the forming process, the solvent and some additives in the electrolyte will be reduced or decomposed, resulting in the generation of gas inside the battery cells. If the gas inside the battery cells cannot be discharged, lithium deposition will occur inside the battery cells, deteriorating the cycle performance of the battery cells. Therefore, in the forming process, the extrusion device 10 is usually used to apply pressure to the battery cells, which can accelerate the discharge of gas from the battery cells and improve the performance of the battery cells.

[0063] The extrusion device 10 can also be applied to other production processes of battery cells, such as the electrolyte injection process and the testing process. In the electrolyte injection process, the electrolyte injection equipment injects the electrolyte into the inside of the battery cells at a high pressure and high speed, resulting in an increase in the internal pressure of the battery cells. The extrusion device 10 can apply pressure to the battery cells from the outside to offset the internal pressure of the battery cells and reduce the deformation of the battery cells. Battery cells need to be sampled and tested during the production process to evaluate the performance of the battery cells, such as testing the capacity or cycle performance of the battery cells. The extrusion device 10 can also be used to pressurize the battery cells during these testing processes.

[0064] When the extrusion device 10 is applied to the production process of battery monomers, the extrusion device 10 can be specifically applied to battery production equipment, such as a formation machine or a capacity machine.

[0065] Of course, the extrusion device 10 provided in the embodiment of the present application can also be used to apply pressure to other parts to be pressurized during the production of battery cells. The following description will be made by taking the extrusion device 10 used to extrude battery cells as an example.

[0066] Specifically, the extrusion device 10 includes a first component 1 and a second component 2. The first component 1 is connected to the second component 2. It can be understood that the first component 1 and the second component 2 are separately formed, and then the first component 1 and the second component 2 are connected to assemble the extrusion device 10. Such an arrangement can reduce the manufacturing difficulty of the extrusion device 10. As an example, the first component 1 and the second component 2 can be bonded, welded or clamped, which is not limited here.

[0067] Further, the first component 1 is a component structure, and the first component 1 includes a frame 11 and a flexible capsule skin 12. The frame 11 is connected to the flexible capsule skin 12, and as an example, the two are bonded or welded together. The frame 11 refers to a structure with frames on all sides and a hollow middle area. The hollow area in the middle of the frame 11 is a through hole 110. Usually the frame 11 has a fixed shape. As an example, the frame 11 is a rigid structure. The material of the frame 11 can be but not limited to metal, plastic, inorganic non-metal, etc. The flexible capsule skin 12 refers to a structure that is difficult for fluid media to pass through and has deformation ability. That is to say, the flexible capsule skin 12 can be deformed. As an example, the flexible capsule skin 12 can be elastically deformed. The material of the flexible capsule skin 12 can be but not limited to leather, rubber, silicone, etc.

[0068] The connection between the first component 1 and the second component 2 is specifically that the flexible capsule 12 and the second component 2 are respectively located on opposite sides of the frame 11, and the flexible capsule 12 is connected to one side of the frame 11, and the second component 2 is connected to the other side of the frame 11. As an example, the frame 11 is obtained by hollowing out the central area of ​​the plate, and the central area of ​​the frame 11 is a through hole 110; in the thickness direction of the frame 11, the frame 11 has two opposite surfaces, namely a first surface 111 and a third surface 114; the flexible capsule 12 is connected to the first surface 111, and the second component 2 is connected to the third surface 114; the frame 11 also has a second surface 112, and the second surface 112 corresponds to the through hole 110, that is, the second surface 112 is the hole wall surface of the through hole 110, and the second surface 112 is also the inner surface of the frame 11.

[0069] The flexible bladder 12, the second component 2 and the frame 11 are connected to jointly define a bladder cavity 3. The bladder cavity 3 is used to accommodate a fluid medium. Here, the fluid medium includes at least one of a liquid medium and a gas medium. As an example, the fluid medium can be a gas medium, such as air, and the extrusion device 10 is specifically an airbag structure; the fluid medium can also be a liquid medium, such as water, oil, etc., and the extrusion device 10 is specifically a liquid bladder structure. Since the flexible bladder 12 can deform, by adjusting the volume of the fluid medium in the bladder cavity 3, the flexible bladder 12 can be deformed, and then the extrusion device 10 expands or contracts. As an example, the extrusion device 10 can be expanded and its volume can be increased by filling the bladder cavity 3 with the fluid medium, and the extrusion device 10 can be shrunk and its volume can be decreased by discharging the fluid medium from the bladder cavity 3; or the liquid medium in the bladder cavity 3 can be vaporized by heating, the extrusion device 10 expands and its volume increases, and the gas medium in the bladder cavity 3 can be liquefied by cooling, and the extrusion device 10 shrinks and its volume decreases. When the volume of the extrusion device 10 increases, the extrusion device 10 can extrude the battery cell, that is, apply pressure to the battery cell; when the volume of the extrusion device 10 decreases, the extrusion device 10 can be separated from the battery cell, facilitating the taking and placing of the battery cell.

[0070] When using the extrusion device 10 to extrude the battery cell, the extrusion force of the extrusion device 10 on the battery cell can be adjusted by adjusting the volume of the fluid medium in the bladder cavity 3; at the same time, since the flexible bladder 12 can deform, when the extrusion device 10 applies pressure to the battery cell, the flexible bladder 12 can adaptively change according to the size, surface shape, etc. of the battery cell, so that the flexible bladder 12 can always keep extruding the battery cell during the pressurization process. In this way, on the one hand, the formation of extrusion dead angles can be reduced, and on the other hand, the application range of the extrusion device 10 can be expanded, so that the extrusion device 10 can be adapted to apply pressure to a variety of different battery cells.

[0071] As described above, the frame 11 has a first surface 111, and the first surface 111 faces away from the third surface 11, that is, the first surface 111 also faces away from the second component 2.

[0072] More specifically, the flexible bladder 12 includes a bladder body 121 and a convex portion 122, where the convex portion 122 protrudes from one side of the bladder body 121. As an example, the bladder body 121 and the convex portion 122 are integrally formed, and the convex portion 122 protrudes from one side surface of the bladder body 121. Of course, in other examples, the bladder body 121 and the convex portion 122 can also be formed separately, and then the bladder body 121 and the convex portion 122 are bonded together.

[0073] The connection between the housing 11 and the flexible envelope 12 is specifically that the envelope body 121 is disposed on the side of the housing 11 facing away from the second component 2, and the envelope body 121 is connected to the first surface 111; the protrusion 122 extends into the interior of the housing 11 or the protrusion 122 extends toward the inner side of the housing 11, and the protrusion 122 is connected to the housing 11.

[0074] It should be noted here that since the through hole 110 is formed in the housing 11, when the envelope body 121 is disposed on the housing 11, the orthographic projection area of the envelope body 121 in the thickness direction is larger than the opening area of the through hole 110, and the envelope body 121 completely covers the through hole 110 to form the capsule cavity 3, that is, the through hole 110 is formed as a part of the capsule cavity 3. In addition, a part of the envelope body 121 also extends onto the first surface 111 of the housing 11 and is connected to the first surface 111, for example, bonded together.

[0075] It means that the protrusion 122 extends into the interior of the housing 11, and it can be that the protrusion 122 entirely or partially extends into the interior of the housing 11. Optionally, in the thickness direction of the housing 11, the orthographic projection of the part of the protrusion 122 extending into the interior of the housing 11 overlaps with the orthographic projection of the housing 11, but is offset from the orthographic projection of the through hole 110 on the housing 11.

[0076] The protrusion 122 extending toward the inner side of the housing 11 means that the protrusion 122 extends into the inner side of the housing 11, and it can be that the protrusion 122 entirely or partially extends into the inner side of the housing 11. Here, the inner side of the housing 11 refers to the side of the housing 11 facing the through hole 110. Correspondingly, the outer side of the housing 11 refers to the side of the housing 11 facing away from the through hole 110. The protrusion 122 extending into the inner side of the housing 11 is specifically that the protrusion 122 extends into the through hole 110, that is, into the capsule cavity 3. Optionally, in the thickness direction of the housing 11, the orthographic projection of the part of the protrusion 122 extending into the inner side of the housing 11 is offset from the orthographic projection of the housing 11, but overlaps with the orthographic projection of the through hole 110 on the housing 11.

[0077] It can be seen that whether the protrusion 122 extends into the interior of the housing 11 or the protrusion 122 extends toward the inner side of the housing 11, the protrusion 122 is spaced apart from the outer side of the housing 11. As an example, the outer surface of the housing 11 is the fourth surface 115, the fourth surface 115 is opposite to the second surface 112, and the protrusion 122 is spaced apart from the fourth surface 115.

[0078] In the process of research and development, the inventors of the present application found that when the flexible bladder 12 does not include the convex portion 122, when the pressure in the bladder cavity 3 increases, for example, when the battery cell and the extrusion device 10 are pressed against each other, it is easy to cause the pressure in the bladder cavity 3 to increase, and the bladder body 121 is likely to peel off from the first surface 111, that is, the flexible bladder 12 and the frame 11 are torn, resulting in the leakage of the fluid medium in the bladder cavity 3 and the failure of the extrusion device 10.

[0079] Therefore, in the extrusion device 10 provided in the embodiment of the present application, the flexible bladder 12 is provided to include a bladder body 121 and a convex portion 122. The convex portion 122 extends into the frame 11 or the inner side of the frame 11 and is connected to the frame 11. Thus, when the pressure in the bladder cavity 3 increases and the bladder body 121 is subjected to a thrust force in the direction away from the frame 11, the convex portion 122 will apply a pulling force to the bladder body 121 in the direction close to the frame 11. This pulling force can offset the above-mentioned thrust force to a certain extent, reduce the tearing angle between the bladder body 121 and the first surface 111, thereby reducing the risk of the bladder body 121 peeling off from the first surface 111, and further reducing the risk of the extrusion device 10 failing.

[0080] It should be noted here that the tearing angle between the bladder body 121 and the first surface 111 refers to the angle between the bladder body 121 and the first surface 111 when the bladder body 121 is separated from the first surface 111. If the tearing angle is larger, the bladder body 121 is more likely to be separated from the first surface 111; if the tearing angle is smaller, the bladder body 121 is more likely to remain connected to the first surface 111.

[0081] In the embodiment of the present application, the second component 2 can be a single-piece structure or an assembly structure. As an example, the second component 2 can be a single-piece structure, such as a metal plate. In this way, the obtained extrusion device 10 can be deformed unidirectionally and perform unidirectional extrusion.

[0082] In some embodiments, please refer to Figures 1 to 8 , the second component 2 has the same structure as the first component 1, and the second component 2 is disposed opposite to the first component 1.

[0083] The second component 2 has the same structure as the first component 1. That is to say, the second component 2 also includes a frame body 11 and a flexible skin 12. For the convenience of distinction, the frame body 11 and the flexible skin 12 in the first component 1 are respectively the first frame body and the first flexible skin; the frame body 11 and the flexible skin 12 in the second component 2 are respectively the second frame body and the second flexible skin. It should be noted here that the fact that the second component 2 has the same structure as the first component 1 does not require the first frame body and the second frame body, as well as the first flexible skin and the second flexible skin, to be exactly the same in terms of shape, size, material, thickness dimension and other details. That is to say, the second component 2 and the first component 1 may have exactly the same structure, or there may be slight differences without affecting the overall structure. Optionally, the structure of the second component 2 is exactly the same as the structure of the first component 1. In this way, the extrusion device 10 is equivalent to two first components 1 assembled together. In this case, only one set of molds needs to be opened to produce the first component 1, greatly reducing the production cost of the extrusion device 10.

[0084] The second component 2 and the first component 1 are oppositely arranged, specifically, the first frame body is connected to the second frame body, the first flexible skin and the second flexible skin are spaced apart, and the first frame body and the second frame body are located between the first flexible skin and the second flexible skin.

[0085] In the above technical solution, the second component 2 is also a component structure, so that the obtained extrusion device 10 can deform on both sides and achieve double-sided extrusion. When using the extrusion device 10 to pressurize the battery cells, battery cells can be placed on both sides of the extrusion device 10, improving the efficiency and saving space.

[0086] In some embodiments, please refer to Figure 10 , the frame body 11 has a second surface 112 corresponding to the bladder cavity 3; the protrusion 122 includes a first protrusion 1221, and the first protrusion 1221 extends into the bladder cavity 3 and is connected to the second surface 112.

[0087] The protrusion 122 specifically includes a first protrusion 1221. The protrusion 122 extending towards the inner side of the frame body 11 is specifically that the first protrusion 1221 extends into the bladder cavity 3 inside the frame body 11. The connection between the protrusion 122 and the frame body 11 may be the connection between the first protrusion 1221 and the second surface 112 of the frame body 11. The advantage of such a setting is that when the pressure in the bladder cavity 3 increases and the bladder body 121 is subjected to a thrust force in the direction away from the frame body 11, the first protrusion 1221 and the part of the bladder body 121 connected to the first surface 111 can simultaneously apply a pulling force in the direction towards the frame body 11 to the bladder body 121, which is equivalent to reducing the force on the bladder body 121 as a whole, making the tearing angle less than 90°, and the flexible skin 12 will only be torn when the bladder body 121 is separated from the first surface 111 and the first protrusion 1221 is also separated from the second surface 112.

[0088] In addition, the connection between the capsule body 121 and the inner edge of the first surface 111 is usually the weak point of the connection between the capsule body 121 and the first surface 111. It is more likely to be preferentially torn due to the repeated pulling of the capsule body 121. The provision of the first protrusion 1221 can, on the one hand, enhance the stability of the connection between the capsule body 121 and the inner edge of the first surface 111, reducing the probability of this connection being preferentially torn. On the other hand, the first protrusion 1221 can also cover the connection between the capsule body 121 and the inner edge of the first surface 111, reducing the risk that the fluid medium in the capsule cavity 3 enters the connection interface between the capsule body 121 and the first surface 111 through this connection, resulting in a decrease in the connection strength between the capsule body 121 and the first surface 111.

[0089] When the protrusion 122 includes the first protrusion 1221, the advantage of setting the first component 1 and the second component 2 as separate parts is that the extrusion device 10 can be assembled by connecting the first protrusion 1221 to the second surface 112 of the frame 11 and then connecting the frame 11 to the second component 2, greatly reducing the manufacturing difficulty of the extrusion device 10.

[0090] In some embodiments, see Figure 11 , the first surface 111 is partially concave inward to form a second receiving groove 113 on the frame 11. The protrusion 122 includes a second protrusion 1222, and the second protrusion 1222 extends into the second receiving groove 113 and is connected to the frame 11.

[0091] The protrusion 122 specifically includes the second protrusion 1222. A second receiving groove 113 is formed on the frame 11. The second receiving groove 113 is specifically formed by the partial depression of the first surface 111 toward the inside of the frame 11. The protrusion 122 extending toward the inside of the frame 11 is specifically that the second protrusion 1222 extends into the second receiving groove 113. The connection between the protrusion 122 and the frame 11 can be the connection between the second protrusion 1222 and the inner wall of the second receiving groove 113 of the frame 11. It can be understood that the depth of the second receiving groove 113 is less than the thickness of the frame 11. The number of the second receiving grooves 113 can be one or more. Correspondingly, the number of the second protrusions 1222 is also one or more. Optionally, the second receiving groove 113 is an annular groove surrounding the through hole 110. Optionally, in the depth direction of the second receiving groove 113, the cross section of the second receiving groove 113 is square, semicircular or V-shaped.

[0092] When the pressure in the bladder cavity 3 increases and the bladder body 121 is pushed in a direction away from the frame body 11, the second protrusion 1222 can apply a pulling force to the bladder body 121 in a direction close to the frame body 11, thereby reducing the risk of the flexible bladder 12 being torn. Also, since the second protrusion 1222 is connected to the inner wall of the second receiving groove 113, the area where the second protrusion 1222 is connected to the frame body 11 is doubled, that is, the connection strength between the second protrusion 1222 and the frame body 11 is increased, thereby reducing the risk of the protrusion 122 separating from the frame body 11, and further reducing the risk of the flexible bladder 12 being torn.

[0093] In addition, when the protrusion 122 includes the second protrusion 1222, when assembling the extrusion device 10, it can be selected to connect the second protrusion 1222 to the frame body 11 first and then connect the frame body 11 to the second component 2, or it can be selected to connect the frame body 11 to the second component 2 first and then connect the second protrusion 1222 to the frame body 11, thus improving the flexibility of assembling the extrusion device 10.

[0094] In some embodiments, the protrusion 122 can be provided to include only the first protrusion 1221, the protrusion 122 can also be provided to include only the second protrusion 1222, and the protrusion 122 can also be provided to include both the first protrusion 1221 and the second protrusion 1222 at the same time. When the protrusion 122 includes both the first protrusion 1221 and the second protrusion 1222 at the same time, a double protection can be formed, further increasing the difficulty of peeling the bladder body 121 from the first surface 111. Generally, after the first protrusion 1221 separates from the frame body 11, the second protrusion 1222 can still continue to provide a pulling force to the bladder body 121. Optionally, the first protrusion 1221 and the second protrusion 1222 are spaced apart on one side surface of the bladder body 121.

[0095] In some embodiments, please refer to Figure 11 , the second surface 112 is partially concave inward and forms a third receiving groove 116 on the frame body 11, and a part of the first protrusion 1221 is embedded in the third receiving groove 116.

[0096] The third receiving groove 116 is formed on the frame body 11. Specifically, the second surface 112 is partially recessed into the interior of the frame body 11 to form the third receiving groove 116. A part of the first protrusion 1221 is embedded in the third receiving groove 116, thereby forming an anchoring effect and reducing the risk of the first protrusion 1221 separating from the second surface 112. Here, the number of the third receiving grooves 116 can be one or more. Optionally, in the depth direction of the third receiving groove 116, the cross-section of the third receiving groove 116 is square, semi-circular or V-shaped.

[0097] In some embodiments, please refer to Figure 5 andFigure 12 The first component 1 further includes a reinforcing frame 13. The reinforcing frame 13 is located within the bladder cavity 3. The reinforcing frame 13 has at least two independent connection ends 130, and the connection ends 130 are connected to the frame body 11.

[0098] The first component 1 further includes a reinforcing frame 13, and the reinforcing frame 13 is connected to the frame body 11. As an example, the reinforcing frame 13 is welded or integrally formed with the frame body 11. Specifically, the reinforcing frame 13 has at least two connection ends 130, such as three, six, ten or more. The connection of the reinforcing frame 13 to the frame body 11 is specifically achieved by connecting the connection ends 130 to the frame body 11. The different connection ends 130 are independent of each other, so that the different connection ends 130 are respectively connected to different parts of the frame body 11.

[0099] Since the frame body 11 is prone to deformation during the expansion of the extrusion device 10, specifically, the frame body 11 expands outwards. The deformation of the frame body 11 will affect the stability of the connection between the flexible bladder 12 and the frame body 11, increasing the risk of separation between the flexible bladder 12 and the frame body 11, and thus leading to the failure of the extrusion device 10. The setting of the reinforcing frame 13 can enhance the anti-deformation ability of the frame body 11 because the different connection ends 130 of the reinforcing frame 13 are connected to different parts of the frame body 11. In this way, when the frame body 11 is forced to expand outwards, the reinforcing frame 13 will pull the frame body 11 inwards, that is, the existence of the reinforcing frame 13 can limit the outward expansion of the frame body 11, reducing the risk of deformation of the frame body 11 and thus reducing the risk of failure of the extrusion device 10.

[0100] The reinforcing frame 13 is located within the bladder cavity 3. The support structure of the reinforcing frame 13 can reduce the influence on the flow of the fluid medium within the bladder cavity 3, and when the extrusion device 10 expands, the reinforcing frame 13 can better avoid the battery cells being extruded. As an example, the reinforcing frame 13 is in a shape of a straight line, a cross, a star or a rich character. Optionally, the flexible bladder 12 is not connected to the reinforcing frame 13, and such a setting is beneficial to the deformation of the flexible bladder 12, improving the buffering effect when the extrusion device 10 extrudes the battery cells. Of course, in some embodiments, the flexible bladder 12 and the reinforcing frame 13 can also be connected.

[0101] The material of the reinforcing frame 13 can be but is not limited to metal, plastic, inorganic non-metal, etc. The material of the reinforcing frame 13 can be the same as or different from the material of the frame body 1. Optionally, the material of the reinforcing frame 13 is the same as the material of the frame body 1, which is convenient for preparation.

[0102] In some embodiments, please refer to Figure 3 and Figure 12, the reinforcing frame 13 includes a cross beam 131 extending in the first direction. Opposite ends of the cross beam 131 are respectively formed as connecting ends 130 and are connected to the second surface 112. By the above arrangement, the cross beam 131 can limit the outward deformation of the housing 11 in the first direction. As an example, the housing 11 is rectangular, and the first direction is the length direction of the housing 11. The number of cross beams 131 can be one or more.

[0103] In some embodiments, refer to Figure 3 and Figure 12 , the reinforcing frame 13 further includes a longitudinal beam 132 extending in the second direction. The second direction intersects the first direction. Opposite ends of the longitudinal beam 132 are respectively connected to the cross beam 131 and the second surface 112. One end of the longitudinal beam 132 connected to the second surface 112 is formed as a connecting end 130. That is to say, the reinforcing frame 13 further includes a longitudinal beam 132, and the longitudinal beam 132 intersects and is connected to the cross beam 131. Specifically, the longitudinal beam 132 has opposite ends. One end of the longitudinal beam 132 is connected to the cross beam 131, and the other end of the cross beam 131 is connected to the second surface 112. At this time, the other end of the cross beam 131 is the connecting end 130. It can be seen that the longitudinal beam 132 can limit the outward deformation of the housing 11 in the second direction. Since the second direction intersects the first direction, in this way, the reinforcing frame 13 can limit the outward deformation of the housing 11 in multiple different directions, further reducing the risk of failure of the extrusion device 10. Optionally, the second direction is perpendicular to the first direction. The number of longitudinal beams 132 can be one or more. When the number of longitudinal beams 132 is multiple, the multiple longitudinal beams 132 are arranged at intervals of each other.

[0104] In some embodiments, refer to Figure 6 , the connecting end 130 is connected to the second surface 112. One side surface of the connecting end 130 facing the bladder body 121 is concave and jointly defines a first receiving groove 133 with the second surface 112. In the case where the protruding portion 122 includes a first protruding portion 1221, a part of the first protruding portion 1221 extends into the first receiving groove 133 and is connected to the reinforcing frame 13 and the second surface 112.

[0105] The connection between the reinforcing frame 13 and the housing 11 is specifically that the connecting end 130 is connected to the second surface 112. The reinforcing frame 13 and the housing 11 jointly define a first receiving groove 133. More specifically, one side surface of the connecting end 130 facing the bladder body 121 is concave and then jointly defines the first receiving groove 133 with the second surface 112. It can be understood that the bottom wall of the first receiving groove 133 is the connecting end 130, and one side wall surface of the first receiving groove 133 is the second surface 112. A part of the first protruding portion 1221 extends into the first receiving groove 133 and is connected to the reinforcing frame 13 and the housing 11. Optionally, in the depth direction of the first receiving groove 133, the cross section of the first receiving groove 133 is square, semi-circular or V-shaped.

[0106] Through the above technical solution, the reinforcing frame 13 is grooved to accommodate the first convex portion 1221, so that the first convex portion 1221 takes root on the reinforcing frame 13, which can reduce the tearing angle at the connection between the flexible skin 12 and the reinforcing frame 13 and improve the connection strength between the flexible skin 12 and the reinforcing frame 13.

[0107] In some embodiments, the thickness of the skin body 121 is 1 mm to 5 mm, and for example, it can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm. By setting as above, the mechanical strength of the skin body 121 can be better, and the skin body 121 is not easily torn when stressed.

[0108] In some embodiments, the thickness of the convex portion 122 is 1 mm to 3 mm, and for example, it can be 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm. It should be noted here that when the convex portion 122 includes the first convex portion 1221, the thickness of the first convex portion 1221 is 1 mm to 3 mm; when the convex portion 122 includes the second convex portion 1222, the thickness of the second convex portion 1222 is 1 mm to 3 mm; when the convex portion 122 includes the first convex portion 1221 and the second convex portion 1222, the thicknesses of the first convex portion 1221 and the second convex portion 1222 are each independently 1 mm to 3 mm.

[0109] In some embodiments, the frame 11 is a metal structure. Such a setting can improve the mechanical strength of the frame 11 and reduce the risk of deformation of the frame 11. As an example, the frame 11 is a steel structure or an aluminum structure.

[0110] In some embodiments, the flexible skin 12 is an elastic plastic structure. The plastic structure refers to a structural member prepared from high molecular plastic materials (such as rubber, silica gel, etc.). The elastic plastic structure refers to a plastic structure with elastic deformation ability. The elastic deformation ability of the elastic plastic structure can further improve the expansion effect of the extrusion device 10 and also reduce the risk of being torn. As an example, the elastic plastic structure is a rubber structure or a silica gel structure. Optionally, the rubber structure includes at least one of ethylene propylene diene monomer rubber (EPDM), fluororubber, and thermoplastic polyurethane rubber (TPU). As an example, the rubber structure includes fluororubber, which has good electrolyte corrosion resistance. Thus, in the case of electrolyte leakage in the battery cell, the risk of corrosion of the flexible skin 12 on the extrusion device 10 can be reduced. Optionally, the rubber structure includes thermoplastic polyurethane rubber, and the flexible skin 12 can be welded to the frame 11 by ultrasonic welding.

[0111] In some embodiments, the connection between the capsule body 121 and the first surface 111 is specifically an adhesion. It can be that the capsule body 121 is directly adhered to the first surface 111. For example, the capsule body 121 includes a vulcanized plastic structure, and the capsule body 121 is adhered to the first surface 111 of the frame 11 during the process of vulcanizing and forming the vulcanized plastic structure; it can also be that the capsule body 121 is adhered to the first surface 111 of the frame 11 through an adhesive (such as glue).

[0112] In some embodiments, the convex portion 122 is adhered to the frame 11. It can be that the convex portion 122 is directly adhered to the frame 11. For example, the convex portion 122 includes a vulcanized plastic structure, and the convex portion 122 is adhered to the frame 11 during the process of vulcanizing and forming the vulcanized plastic structure; it can also be that the convex portion 122 is adhered to the frame 11 through an adhesive. The convex portion 122 includes a first convex portion 1221, and the first convex portion 1221 is adhered to the frame 11, more specifically, the first convex portion 1221 is adhered to the second surface 112. The convex portion 122 includes a second convex portion 1222, and the second convex portion 1222 is adhered to the frame 11, more specifically, the second convex portion 1222 is connected to the inner surface of the wall of the second receiving groove 113.

[0113] In some embodiments, please refer to Figure 10 and Figure 11 , the extrusion device 10 further includes an adhesive layer 4, and the adhesive layer 4 is disposed between the second component 2 and the frame 11 and bonds the second component 2 and the frame 11 together. That is to say, the second component 2 and the first component 1 are bonded together through the adhesive layer 4, and this setting method is simple and reliable.

[0114] In some embodiments, both the flexible capsule skin 12 and the adhesive layer 4 include vulcanized plastic structures. The flexible capsule skin 12 can be wholly or partially a vulcanized plastic structure. The adhesive layer 4 can be wholly or partially a vulcanized plastic structure. The vulcanized plastic structure has the characteristic of high adhesive strength, so as to improve the connection strength between the flexible capsule skin 12 and the frame 11, and improve the connection strength between the second component 2 and the first component 1, and reduce the risk of the extrusion device 10 failing. Optionally, the flexible capsule skin 12 is a vulcanized plastic structure obtained by vulcanizing raw rubber material. Compared with the vulcanized plastic structure obtained by vulcanizing semi-cured rubber material, the vulcanized plastic structure obtained by vulcanizing this raw rubber material has better adhesive performance, so that the risk of the flexible capsule skin 12 being torn can be reduced. Optionally, the adhesive layer 4 is a vulcanized plastic structure obtained by vulcanizing raw rubber material.

[0115] In some embodiments, please refer to Figure 3 and Figure 8The extrusion device 10 further includes a valve body 5 disposed outside the capsule cavity 3. A fluid channel 6 connected to the capsule cavity 3 is provided on at least one of the first component 1 and the second component 2. The valve body 5 is connected to at least one of the first component 1 and the second component 2 and connected to the fluid channel 6. Optionally, the valve body 5 is a switch, which has two states: off and on. When it is necessary to introduce a fluid medium into the capsule cavity 3, the valve body 5 is opened, and the fluid medium flows into the capsule cavity 3 through the valve body 5 and the fluid channel 6 in sequence, so that the volume of the extrusion device 10 expands, and the valve body 5 is closed after completion; when it is necessary to discharge the fluid medium in the capsule cavity 3, the valve body 5 is opened, and the fluid medium in the capsule cavity 3 flows out of the capsule cavity 3 through the fluid channel 6 and the valve body 5 in sequence, and the volume of the extrusion device 10 is reduced. Optionally, the valve body 5 is a one-way valve, that is, the valve body 5 is unidirectional, and the fluid medium can only flow into the capsule cavity 3 through the valve body 5 and the fluid channel 6, and the fluid medium cannot flow out of the capsule cavity 3 through the valve body 5.

[0116] As an example, the fluid channel 6 is a first through hole opened on the first component 1 , the valve body 5 is also arranged on the first component 1 , and the first through hole connects the valve body 5 and the bag cavity 3 .

[0117] As an example, the fluid channel 6 is a second through hole opened on the second component 2 , the valve body 5 is also arranged on the second component 2 , and the second through hole connects the valve body 5 and the capsule cavity 3 .

[0118] As an example, the fluid channel 6 is a third through hole that penetrates the first component 1 and the second component 2 at the same time. The third through hole is formed by combining the semicircular groove on the first component 1 and the semicircular groove on the second component 2. The valve body 5 is also connected to the first component 1 and the second component 2 at the same time. The third through hole connects the valve body 5 and the bag cavity 3.

[0119] In a second aspect, an embodiment of the present application provides a method for preparing an extrusion device 10, comprising:

[0120] S1, providing a frame 11, wherein one side surface of the frame 11 in the thickness direction is a first surface 111;

[0121] S2. Prepare a flexible bag skin 12 on one side of the frame 11 to obtain the first component 1; wherein the flexible bag skin 12 includes a bag skin body 121 and a protrusion 122 protruding from one side of the bag skin body 121, the bag skin body 121 is located on one side of the frame 11 and connected to the first surface 111, and the protrusion 122 extends into the inside of the frame 11 or the inner side of the frame 11 and is connected to the frame 11.

[0122] S3, providing a second component 2, setting the second component 2 on a side of the frame 11 away from the flexible bag skin 12 and connecting the second component 2 to the frame 11, the second component 2, the frame 11 and the flexible bag skin 12 together define the bag cavity 3, thereby obtaining the extrusion device 10.

[0123] It should be noted here that in step S2, the flexible capsule skin 12 can be prepared first and then the flexible capsule skin 12 and the frame body 11 can be arranged together, or the flexible capsule skin 12 can be directly formed on the frame body 11.

[0124] When the pressure in the capsule cavity 3 of the extrusion device 10 prepared by the preparation method of the extrusion device 10 provided in the embodiment of the present application increases, when the capsule skin body 121 is subjected to a thrust force in the direction away from the frame body 11, the convex portion 122 will apply a pulling force in the direction close to the frame body 11 to the capsule skin body 121. This pulling force can offset the above-mentioned thrust force to a certain extent, reduce the tearing angle between the capsule skin body 121 and the first surface 111, thereby reducing the risk of the capsule skin body 121 peeling off from the first surface 111, and further reducing the risk of failure of the extrusion device 10.

[0125] In some embodiments, in step S2, the preparation process of the first component 1 includes: placing the first raw rubber part on the frame body 11, vulcanizing the first raw rubber part to obtain the flexible capsule skin 12, and bonding the flexible capsule skin 12 and the frame body 11 to obtain the first component 1. That is to say, the flexible capsule skin 12 is obtained by vulcanizing the first raw rubber part on the frame body 11. The first raw rubber part contains raw rubber. Raw rubber refers to sulfur-free plastic. After vulcanization treatment, the raw rubber becomes vulcanized rubber, that is, vulcanized plastic. The flexible capsule skin 12 contains vulcanized plastic, and the vulcanized plastic has good bonding properties, so it can be effectively bonded to the frame body 11 during the forming process of the flexible capsule skin 12.

[0126] In some embodiments, please refer to Figures 12 to 14 , the process of obtaining the flexible capsule skin 12 by vulcanizing the first raw rubber part on the frame body 11 includes:

[0127] Provide a first mold 200, the first mold 200 includes a lower mold 210 and an upper mold 220. The lower mold 210 includes a mold body 211 and a convex platform 212. The convex platform 212 protrudes from one side surface of the mold body 211. The upper mold 220 is reversely arranged on the mold body 211. The upper mold 220 and the mold body 211 define a first cavity 230, and the convex platform 212 extends into the first cavity 230;

[0128] Coat a vulcanizing agent on the first surface 111 and the second surface 112 of the frame body 11. The second surface 112 is the inner surface of the frame body 11;

[0129] Place the frame body 11 in the first cavity 230 of the first mold 200 and the convex platform 202 penetrates into the inside of the frame body 11. The convex platform 202 is spaced from the second surface 112 of the frame body 11 and forms a gap therebetween;

[0130] Provide a first raw rubber part and lay the first raw rubber part on the first surface 111 and the top surface of the convex platform 202;

[0131] The first raw rubber piece is heated and pressurized by the lower mold 210 and the upper mold 220, so that the first raw rubber piece is at least partially melted and penetrates into the gap, and the first raw rubber piece is at least partially vulcanized with the vulcanizing agent to form vulcanized plastic, thereby obtaining the flexible bladder skin 12. The flexible bladder skin 12 is bonded to the frame 11, thereby obtaining the first component 1.

[0132] As an example, the vulcanizing agent includes at least one of sulfur and an organic sulfide.

[0133] The first raw rubber piece is subjected to heating and pressurizing treatment by using the lower mold 210 and the upper mold 220 . Specifically, the first raw rubber piece is subjected to heating and pressing by using the lower mold 210 and the upper mold 220 .

[0134] Optionally, the frame 11 is further provided with a reinforcing frame 13, and the boss 212 is further provided with an escape groove 213 for accommodating the reinforcing frame 13. During the vulcanization process, the reinforcing frame 13 is accommodated in the escape groove 213.

[0135] In some embodiments, before preparing the flexible bladder skin 12 on the frame 11, the surface of the frame 11 is first sandblasted, especially the first surface 111 and the second surface 112 are sandblasted, so as to enhance the bonding effect between the flexible bladder skin 12 and the frame 11, especially when the flexible bladder skin 12 is obtained by vulcanizing the first raw rubber part on the frame 11.

[0136] In some embodiments, the second component 2 and the first component 1 are connected via an adhesive layer 4, that is, the obtained extrusion device 10 further comprises an adhesive layer 4. As an example, the adhesive layer 4 can be a glue curing agent.

[0137] In some embodiments, the second component 2 is arranged on a side of the frame 11 away from the flexible bag skin 12 and connected to the frame 11, including: arranging a second raw rubber piece between the second component 2 and the frame 11, vulcanizing the second raw rubber piece to obtain an adhesive layer 4, and the adhesive layer 4 bonds the second component 2 to the frame 11. In other words, the adhesive layer 4 is obtained by vulcanizing the second raw rubber piece. The second raw rubber piece contains raw rubber. The adhesive layer 4 contains vulcanized plastic, which has good bonding properties, so the second component 2 and the first component 1 can be effectively bonded together during the molding process of the adhesive layer 4.

[0138] In some embodiments, the process of vulcanizing the second raw rubber part to obtain the bonding layer 4 includes:

[0139] Providing a second mold (not shown), the second mold comprising a front mold and a rear mold, the front mold and the rear mold are buckled together to define a second cavity;

[0140] Apply vulcanizing agent on the bonding surfaces of the first component 1 and the second component 2 respectively;

[0141] Stack the first component 1, the second raw rubber part and the second component 2 together and place them into the second cavity of the second mold;

[0142] Heat and press the second raw rubber part with the front mold and the rear mold, so that at least part of the second raw rubber part undergoes a vulcanization reaction with the vulcanizing agent and forms vulcanized plastic to obtain the bonding layer 4. The bonding layer 4 bonds the first component 1 and the second component 2 together, and thus the extrusion device 10 is obtained.

[0143] In some embodiments, before applying the vulcanizing agent on the bonding surfaces of the first component 1 and the second component 2, sandblast the bonding surfaces of the first component 1 and the second component 2 first to improve the bonding effect between the first component 1 and the second component 2 and the bonding layer 44.

[0144] In some embodiments, the preparation method of the above extrusion device 10 is used to prepare the extrusion device 10 provided in the first aspect of the embodiments of the present application.

[0145] For the third aspect, please refer to Figure 16 , the embodiments of the present application provide a tray 100, which includes a tray body 101 and the extrusion device 10 prepared by the above extrusion device 10 or the preparation method of the above extrusion device 10. The extrusion device 10 is arranged on the tray body 101.

[0146] Since the tray 100 includes the above extrusion device 10, the tray 100 has all the beneficial effects of the above extrusion device 10, which will not be elaborated herein in the embodiments of the present application.

[0147] The tray 100 is used to load battery cells. Specifically, the battery cells and the extrusion device 10 are carried on the tray body 101 together. The extrusion device 10 is used to extrude the battery cells. Optionally, the number of the extrusion devices 10 is multiple, and the number of the battery cells is also multiple. The battery cells and the extrusion devices 10 are arranged alternately on the tray body 101, and a single battery cell is located between two extrusion devices 10. The extrusion device 10 can extrude the battery cells, that is, pressurization is achieved.

[0148] For the fourth aspect, please refer to Figure 17 , the embodiments of the present application provide a battery production equipment 1000, which includes the above tray 100.

[0149] Since the battery production equipment includes the above tray 100, the battery production equipment 1000 has all the beneficial effects of the above tray 100, which will not be elaborated herein in the embodiments of the present application.

[0150] In some embodiments, the battery production device 1000 is configured to produce battery cells. As an example, the battery production device 1000 includes at least one of a liquid injection machine, a formation machine, and a capacity machine.

[0151] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0152] In the above embodiments, the descriptions of the various embodiments have their respective focuses. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0153] The embodiments, implementation manners, and related technical features of the present application can be combined and replaced with each other without conflict.

[0154] The above are only the preferred embodiments of the present application and do not impose any formal limitations on the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. An extrusion device (10), characterized in that: The invention comprises a first component (1) and a second component (2) which are connected; the first component (1) comprises a connected frame (11) and a flexible bag skin (12); the flexible bag skin (12) and the second component (2) are respectively connected to opposite sides of the frame (11) and jointly define a bag cavity (3); the frame (11) has a first surface (111) which is away from the second component (2); the flexible bag skin (12) comprises a bag skin body (121) and a protruding portion (122) which is protruded from one side of the bag skin body (121); the bag skin body (121) is located on a side of the frame (11) away from the second component (2) and is connected to the first surface (111); the protruding portion (122) extends into the interior of the frame (11) or the inner side of the frame (11) and is connected to the frame (11).

2. The extrusion device (10) according to claim 1, characterized in that The frame (11) has a second surface (112) corresponding to the capsule cavity (3); the protrusion (122) includes a first protrusion (1221), and the first protrusion (1221) extends into the capsule cavity (3) and is connected to the second surface (112).

3. The extrusion device (10) according to claim 2, characterized in that The second surface (112) is partially concave and forms a third receiving groove (116) on the frame (11), and a portion of the first protrusion (1221) is embedded in the third receiving groove (116).

4. The extrusion device (10) according to any one of claims 1 to 3, characterized in that: The first surface (111) is partially concave and forms a second receiving groove (113) on the frame body (11); the protrusion (122) comprises a second protrusion (1222); the second protrusion (1222) extends into the second receiving groove (113) and is connected to the frame body (11).

5. The extrusion device (10) according to any one of claims 1 to 3, characterized in that: The first component (1) further comprises a reinforcing frame (13), wherein the reinforcing frame (13) is located in the capsule cavity (3), and the reinforcing frame (13) has at least two independent connecting ends (130), and the connecting ends (130) are connected to the frame (11).

6. The extrusion device (10) according to claim 5, characterized in that The reinforcing frame (13) comprises a cross beam (131) extending along a first direction, wherein opposite ends of the cross beam (131) are respectively formed as the connecting ends (130) and are connected to the second surface (112); the reinforcing frame (13) further comprises a longitudinal beam (132) extending along a second direction, wherein the second direction intersects with the first direction, and opposite ends of the longitudinal beam (132) are respectively connected to the cross beam (131) and the second surface (112), and one end of the longitudinal beam (132) connected to the second surface (112) is formed as the connecting end (130).

7. The extrusion device (10) according to claim 5, characterized in that The connecting end (130) is connected to the second surface (112), and the connecting end (130) is concave toward one side surface of the bag skin body (121) and defines a first receiving groove (133) together with the second surface (112). When the protrusion (122) includes a first protrusion (1221), a portion of the first protrusion (1221) extends into the first receiving groove (133) and is connected to the reinforcing frame (13) and the second surface (112).

8. The extrusion device (10) according to any one of claims 1 to 3, characterized in that: The thickness of the bag skin body (121) is 1 mm to 5 mm; and / or the thickness of the raised portion (122) is 1 mm to 3 mm; and / or the frame (11) is a metal structure; and / or the flexible bag skin (12) is an elastic plastic structure; and / or the bag skin body (121) is bonded to the first surface (111); and / or the raised portion (122) is bonded to the frame (11).

9. The extrusion device (10) according to any one of claims 1 to 3, characterized in that: The extrusion device (10) further comprises an adhesive layer (4), wherein the adhesive layer (4) is arranged between the second component (2) and the frame (11) and bonds the second component (2) and the frame (11) together.

10. The extrusion device (10) according to claim 9, characterized in that The flexible bladder skin (12) and the adhesive layer (4) both comprise a vulcanized plastic structure.

11. The extrusion device (10) according to any one of claims 1 to 3, characterized in that: The second component (2) has the same structure as the first component (1), and the second component (2) is arranged opposite to the first component (1); and / or, The extrusion device (10) further comprises a valve body (5) arranged outside the sac cavity (3); a fluid channel (6) connected to the sac cavity (3) is provided on at least one of the first component (1) and the second component (2); the valve body (5) is connected to at least one of the first component (1) and the second component (2) and is connected to the fluid channel (6).

12. A method for preparing an extrusion device (10), characterized in that: include: A frame body (11) is provided, wherein one side surface of the frame body (11) in the thickness direction is a first surface (111); A flexible bag skin (12) is prepared on one side of the frame (11), thereby obtaining a first component (1); wherein the flexible bag skin (12) comprises a bag skin body (121) and a raised portion (122) protruding from one side of the bag skin body (121); the bag skin body (121) is located on one side of the frame (11) and connected to the first surface (111); the raised portion (122) extends toward the inside of the frame (11) or the inner side of the frame (11) and is connected to the frame (11); A second component (2) is provided, and the second component (2) is arranged on a side of the frame (11) away from the flexible bag skin (12) and connected to the frame (11); the second component (2), the frame (11) and the flexible bag skin (12) jointly define a bag cavity (3), thereby obtaining an extrusion device (10).

13. The method for preparing the extrusion device (10) according to claim 12, characterized in that: The preparation process of the first component (1) comprises: placing a first raw rubber piece on the frame (11), vulcanizing the first raw rubber piece to obtain a flexible bladder skin (12), bonding the flexible bladder skin (12) to the frame (11) to obtain the first component (1); and / or arranging the second component (2) on a side of the frame (11) away from the flexible bladder skin (12) and connecting it to the frame (11) comprises: arranging a second raw rubber piece between the second component (2) and the frame (11), vulcanizing the second raw rubber piece to obtain an adhesive layer (4), and the adhesive layer (4) bonds the second component (2) to the frame (11).

14. A tray (100), characterized in that: It comprises a pallet body (101) and an extrusion device (10) prepared by the preparation method of the extrusion device (10) as described in any one of claims 1 to 11 or the extrusion device (10) as described in claim 12 or 13, and the extrusion device (10) is arranged on the pallet body (101).

15. A battery production device (1000), characterized in that: Comprising the tray (100) as claimed in claim 14.

Images