Hot pressing composite equipment

Abstract

This invention relates to the field of battery manufacturing technology, and particularly to a hot-pressing composite equipment. In this hot-pressing composite equipment, a first electrode receiving cavity, a sealing and insulating receiving cavity, and a second electrode receiving cavity are provided within a supporting fixture to receive a stacked first electrode sheet, a sealing and insulating sheet, and a second electrode sheet. A through hole penetrating the supporting fixture is provided at the bottom of the first electrode receiving cavity, so that during preheating, the lifting mechanism of the preheating section can extend into the through hole and lift the first electrode sheet, allowing the sealing and insulating sheet to effectively contact the second electrode sheet. This enables the second electrode sheet and the sealing and insulating sheet to effectively bond during preheating, improving the bonding effect and thus enhancing the subsequent pressing effect on the battery cap.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and in particular to a hot-pressing composite equipment. Background Technology

[0002] In the battery manufacturing process, positive and negative electrode sheets are stacked and pressed together with a sealing insulating sheet in between to form the battery cap. In the prior art, the stacked positive and negative electrode sheets and the sealing insulating sheet need to be preheated before pressing them together. However, the contact effect between the sealing insulating sheet and the positive or negative electrode sheet is poor during the preheating process, making it difficult for the sealing insulating sheet to effectively bond with the positive or negative electrode sheet, which affects the subsequent pressing effect of the battery cap. Summary of the Invention

[0003] The main objective of this invention is to propose a hot-pressing composite device, which aims to solve the technical problem of how to improve the bonding effect between the sealing insulating sheet and the positive or negative electrode sheet during the preheating process.

[0004] To achieve the above objectives, the present invention proposes a hot-pressing composite device, comprising a supporting body, a supporting fixture, a first electrode loading section, a sealing and insulating loading section, a second electrode loading section, a limiting heating section, and a preheating section. The supporting fixture is disposed on the supporting body, and the movement of the supporting body causes the supporting fixture to pass through the first electrode loading section, the sealing and insulating loading section, the second electrode loading section, the limiting heating section, and the preheating section. The supporting fixture is provided with a first electrode receiving cavity, a sealing and insulating receiving cavity, a second electrode receiving cavity, and a through hole that are sequentially connected. The through hole is located at the bottom of the first electrode receiving cavity and penetrates the supporting fixture. The cross-sectional area of ​​the sealing and insulating loading section is smaller than the cross-sectional area of ​​the second electrode receiving cavity, and the difference in the outer dimensions of one side is greater than 0.2 mm. When the supporting fixture passes through the first electrode loading section, the first electrode sheet carried by the first electrode loading section falls into the first electrode receiving cavity, and the geometric center of the first electrode sheet is aligned with the first electrode receiving cavity. The line connecting the geometric centers of the electrode receiving cavity is vertical; when the carrying fixture passes the sealing and insulating feeding part, the sealing and insulating sheet carried by the sealing and insulating feeding part falls into the sealing and insulating receiving cavity, and the line connecting the geometric center of the sealing and insulating sheet and the geometric center of the sealing and insulating receiving cavity is vertical; when the carrying fixture passes the limiting heating part, the limiting heating part heats the first electrode sheet to make the first electrode sheet bond with the sealing and insulating sheet; when the carrying fixture passes the second electrode feeding part, the second electrode sheet carried by the second electrode feeding part falls into the second electrode receiving cavity, and the line connecting the geometric center of the second electrode sheet and the geometric center of the second electrode receiving cavity is vertical; when the carrying fixture passes the preheating part, the preheating part lifts the first electrode sheet until the sealing and insulating sheet contacts the second electrode sheet, and the preheating part heats the second electrode sheet to make the second electrode sheet bond with the sealing and insulating sheet.

[0005] Optionally, the depth direction of the first electrode receiving cavity, the sealed insulating receiving cavity, and the second electrode receiving cavity is vertical, and the geometric centers of the cross-sections of the first electrode receiving cavity, the sealed insulating receiving cavity, and the second electrode receiving cavity are on the same straight line, so that the first electrode sheet, the sealed insulating sheet, and the second electrode sheet are stacked in the vertical direction.

[0006] Optionally, the cross-section of the sealed insulating cavity and the cross-section of the second electrode cavity are the same in size and shape.

[0007] Optionally, the depth direction of the through hole is vertical, and the cross-sections of the first electrode receiving cavity, the sealed insulating receiving cavity, the second electrode receiving cavity, and the geometric center of the through hole are on the same straight line.

[0008] Optionally, the cross-sections of the first electrode receiving cavity, the sealed and insulated receiving cavity, the second electrode receiving cavity, and the through hole are circular.

[0009] Optionally, the radial dimensions of the first electrode receiving cavity and the sealed insulating receiving cavity are set to 2.8 mm to 24.8 mm; the radial dimension of the second electrode receiving cavity is set to 3 mm to 25 mm; the cross-section of the through hole is circular, and the diameter is set to 1.5 mm to 24.6 mm; wherein the radial dimensions of the second electrode receiving cavity, the radial dimensions of the first electrode receiving cavity, and the diameter of the through hole decrease sequentially.

[0010] Optionally, the end of the second electrode receiving cavity away from the first electrode receiving cavity is provided with a first chamfer; and / or, the end of the sealed and insulating receiving cavity away from the through hole is provided with a second chamfer; and / or, the end of the through hole away from the first electrode receiving cavity is provided with a third chamfer.

[0011] Optionally, the number of the first electrode receiving cavity, the sealed and insulated receiving cavity, the second electrode receiving cavity, and the through hole are all three. The first electrode receiving cavity, the sealed and insulated receiving cavity, and the second electrode receiving cavity are sequentially connected. The through hole is correspondingly located at the bottom of the first electrode receiving cavity.

[0012] Optionally, the support fixture is rectangular, and three first electrode receiving cavities, the sealed and insulating receiving cavity, the second electrode receiving cavity, and the through hole are spaced apart along the length of the support fixture. The support body is provided with a mounting hole, and the side wall of the mounting hole is provided with a mounting boss. The support fixture is received in the mounting hole and supported on the mounting boss. The edges of the support fixture in the height direction form bevels, and the edges of the mounting hole are provided with clearance holes.

[0013] Optionally, the support fixture has an assembly hole, and the mounting boss has a screw hole. The assembly hole and the screw hole are used for fasteners to pass through, so that the support fixture is fixedly installed on the support body.

[0014] In the hot-pressing composite equipment of the present invention, a first electrode receiving cavity, a sealing and insulating receiving cavity, and a second electrode receiving cavity are provided in the support fixture to receive the stacked first electrode sheet, sealing and insulating sheet, and second electrode sheet; and a through hole penetrating the support fixture is provided at the bottom of the first electrode receiving cavity, so that during the preheating process, the lifting mechanism of the preheating part can extend into the through hole and lift the first electrode sheet, so that the sealing and insulating sheet can effectively contact the second electrode sheet, thereby effectively bonding the second electrode sheet and the sealing and insulating sheet during the preheating process, thereby improving the bonding effect between the second electrode sheet and the sealing and insulating sheet, and thus enhancing the subsequent pressing effect on the battery cap. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an embodiment of the support body and support fixture in the present invention;

[0017] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0018] Figure 3 This is a schematic diagram of the structure of an embodiment of the support fixture, electrode sheet, and sealing insulating sheet of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of an embodiment of the support fixture, lifting mechanism and battery cap of the present invention;

[0020] Figure 5 This is a top view schematic diagram of an embodiment of the support fixture of the present invention;

[0021] Figure 6 for Figure 5 A cross-sectional view along the AA direction;

[0022] Figure 7 for Figure 6 A magnified view of a section at point B in the middle.

[0023] Explanation of icon numbers:

[0024] 10 Support fixture 11 First electrode receiving cavity 12 Sealed Insulated Reception Cavity 13 Second electrode receiving cavity 14 Through hole 21 First electrode plate 22 Sealing insulation sheet 23 Second electrode plate 131 First chamfer 121 Second chamfer 141 Third chamfer 15 bevel 16 Assembly holes 20 Battery cap 30 Lifting mechanism 31 mandrel 40 main body 41 Mounting holes 42 Install boss 421 screw hole 411 Hole

[0025] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0029] During battery manufacturing, the positive and negative electrode sheets are laminated together with a sealing insulating sheet 22 in between to form the battery cap 20. In the prior art, before laminating the positive and negative electrode sheets and the sealing insulating sheet 22, the laminated positive and negative electrode sheets and the sealing insulating sheet 22 need to be preheated. However, during the preheating process, the positioning effect of the sealing insulating sheet 22 with the positive or negative electrode sheet is poor, which results in the sealing insulating sheet 22 not being able to completely isolate the positive and negative electrode sheets, thus causing the battery cap 20 to short-circuit and affecting the battery's yield.

[0030] This invention proposes a hot-pressing composite device for pressing electrode sheets and a sealing insulating sheet 22 together to form a battery cap 20. The electrode sheets include a first electrode sheet 21 and a second electrode sheet 23, one of which is a positive electrode sheet and the other a negative electrode sheet. The sealing insulating sheet 22 is disposed between the first electrode sheet 21 and the second electrode sheet 23. It should be noted that this application uses a circular outer contour of the first electrode sheet 21, the sealing insulating sheet 22, and the second electrode sheet 23 as an example for illustration. However, this application does not limit the specific shapes of the first electrode sheet 21, the sealing insulating sheet 22, and the second electrode sheet 23 applicable to processing. In other embodiments of this application, the outer contours of the first electrode sheet 21, the sealing insulating sheet 22, and the second electrode sheet 23 applicable to processing by the hot-pressing composite device can be polygonal, elliptical, or other shapes, designed according to user requirements.

[0031] In embodiments of the present invention, such as Figure 1 , Figure 3 , Figures 5 to 7 As shown, Figure 1 This is a schematic diagram of an embodiment of the support body 40 and the support fixture 10 in this invention; Figure 3 This is a schematic diagram of the structure of one embodiment of the support fixture 10, electrode sheet and sealing insulating sheet 22 of the present invention; Figure 5 This is a top view schematic diagram of an embodiment of the support fixture 10 of the present invention; Figure 6 for Figure 3 A cross-sectional view along the AA direction; Figure 7 for Figure 4 A magnified view of a section at point B in the middle.

[0032] The hot-pressing composite equipment includes a support body 40, a support fixture 10, a first electrode loading section, a sealing and insulating loading section, a second electrode loading section, a limiting heating section, and a preheating section. The support fixture 10 is mounted on the support body 40. The movement of the support body 40 drives the support fixture 10 through the first electrode loading section, the sealing and insulating loading section, the second electrode loading section, the limiting heating section, and the preheating section. The support fixture 10 has a first electrode receiving cavity 11, a sealing and insulating receiving cavity 12, a second electrode receiving cavity 13, and a through hole 14 connected in sequence. The through hole 14 is located at the bottom of the first electrode receiving cavity 11 and penetrates the support fixture 10. The cross-sectional area of ​​the sealing and insulating loading section is smaller than the cross-sectional area of ​​the second electrode receiving cavity 13, and the difference in the outer dimensions of one side is greater than 0.2 mm.

[0033] When the support fixture 10 passes the first electrode loading section, the first electrode sheet 21 carried by the first electrode loading section falls into the first electrode receiving cavity 11, and the line connecting the geometric center of the first electrode sheet 21 and the geometric center of the first electrode receiving cavity 11 is vertical. When the support fixture 10 passes the sealing and insulating loading section, the sealing and insulating sheet 22 carried by the sealing and insulating loading section falls into the sealing and insulating receiving cavity 12, and the line connecting the geometric center of the sealing and insulating sheet 22 and the geometric center of the sealing and insulating receiving cavity 12 is vertical. When the support fixture 10 passes the limiting heating section, the limiting heating section heats the first electrode sheet 21 to bond the first electrode sheet 21 to the sealing and insulating sheet 22.

[0034] When the support fixture 10 passes through the second electrode loading section, the second electrode sheet 23 carried by the second electrode loading section falls into the second electrode receiving cavity 13, and the line connecting the geometric center of the second electrode sheet 23 and the geometric center of the second electrode receiving cavity 13 is vertical.

[0035] When the support fixture 10 passes through the preheating section, the preheating section lifts the first electrode plate 21 until the sealing insulating sheet 22 contacts the second electrode plate 23. The preheating section heats the second electrode plate 23 to make the second electrode plate 23 bond with the sealing insulating sheet 22.

[0036] Since the first electrode sheet 21, the sealing insulating sheet 22, and the second electrode sheet 23 are laminated together to form the battery cap 20, the second electrode sheet 23 needs to expose a portion of its edge to ensure the welding of subsequent parts. Therefore, the outer contour dimension of one side of the second electrode sheet 23 needs to be 0.2 mm larger than that of the sealing insulating sheet 22. In this application, the outer contours of the first electrode sheet 21, the sealing insulating sheet 22, and the second electrode sheet 23 are all circular, which means that the radius of the second electrode sheet 23 needs to be 0.2 mm larger than the radius of the sealing insulating sheet 22.

[0037] In this embodiment, the carrier body 40 is provided with multiple workstations. The first electrode loading section, the sealing and insulating loading section, the second electrode loading section, the limiting heating section, and the preheating section are respectively set for each workstation of the carrier body 40. The carrier body 40 drives the carrier fixture 10 to move between the various workstations, so that the carrier fixture 10 passes through the first electrode loading section, the sealing and insulating loading section, the second electrode loading section, the limiting heating section, and the preheating section.

[0038] The support fixture 10 is used to support the first electrode sheet 21, the sealing and insulating sheet 22, and the second electrode sheet 23 to be pressed. The support fixture 10 may be made of aerospace aluminum, and its surface may be provided with a hardening layer or subjected to a hardening process to further improve the structural strength of the support fixture 10. It should be understood that this application does not limit the specific material of the support fixture 10. Under the condition of meeting the usage requirements, the support fixture 10 may also be made of metal or plastic materials, etc.

[0039] The first electrode receiving cavity 11, the sealed insulating receiving cavity 12, and the second electrode receiving cavity 13 are connected vertically in sequence. The second electrode receiving cavity 13 penetrates one side of the supporting fixture 10, and the through hole 14 is located at the bottom of the first electrode receiving cavity 11 and penetrates the other side of the supporting fixture 10. The first electrode plate 21, the sealed insulating plate 22, and the second electrode plate 23 can be sequentially inserted into the first electrode receiving cavity 11, the sealed insulating receiving cavity 12, and the second electrode receiving cavity 13 through the opening of the second electrode receiving cavity 13.

[0040] The cross-sectional shape of the first electrode receiving cavity 11 is the same as the outer contour shape of the first electrode sheet 21, and the cross-sectional shape of the first electrode receiving cavity 11 is slightly larger than the outer contour shape of the first electrode sheet 21, so as to achieve the positioning of the first electrode sheet 21 on the support fixture 10. It should be understood that the relationship between the shape and size of the sealed insulating receiving cavity 12 and the sealed insulating sheet 22, and the relationship between the second electrode receiving cavity 13 and the second electrode sheet 23 are the same as the relationship between the first electrode receiving cavity 11 and the first electrode sheet 21, and will not be described in detail here.

[0041] In this embodiment, the outer contours of the first electrode sheet 21 and the sealing insulating sheet 22 processed by the hot-pressing composite equipment are the same in size and shape. Therefore, the cross-section of the sealing insulating receiving cavity 12 and the cross-section of the first electrode receiving cavity 11 are the same in size and shape to ensure the positioning requirements between the first electrode sheet 21 and the sealing insulating sheet 22. At this time, the sealing insulating receiving cavity 12 and the first electrode receiving cavity 11 are connected to form a cavity, as shown in the specific structure. Figure 7 As shown. The design that the cross-section of the sealed insulating cavity 12 and the cross-section of the first electrode cavity 11 are the same in size and shape can simplify the structure of the jig body 10 and reduce the number of processing steps of the jig body 10, thereby reducing costs.

[0042] Specifically, the outer contours of the first electrode sheet 21, the sealing insulating sheet 22, and the second electrode sheet 23 processed in this application are all cylindrical, with the outer contour diameters of the first electrode sheet 21 and the sealing insulating sheet 22 being 8.5 mm and the outer contour diameter of the second electrode sheet 23 being 10.35 mm. Correspondingly, the cross-sections of the first electrode receiving cavity 11, the sealing insulating receiving cavity 12, and the second electrode receiving cavity 13 are circular, with the diameters of the first electrode receiving cavity 11 and the sealing insulating receiving cavity 12 being 8.55 mm and the diameter of the second electrode receiving cavity 13 being 10.4 mm. It should be understood that in the embodiments of this application, the first electrode receiving cavity 11 is slightly larger than the first electrode sheet 21, the sealing and insulating receiving cavity 12 is slightly larger than the sealing and insulating sheet 22, and the second electrode receiving cavity 13 is slightly larger than the second electrode sheet 23 in order to limit the first electrode sheet 21, the sealing and insulating sheet 22, and the second electrode sheet 23 in the radial direction, thereby ensuring the positioning accuracy between the first electrode sheet 21, the sealing and insulating sheet 22, and the second electrode sheet 23. However, this application does not limit the specific shape and size of the cross-section of the first electrode receiving cavity 11, the sealing and insulating receiving cavity 12, the second electrode receiving cavity 13, and the through hole 14. In other embodiments of this application, the first electrode sheet 21, the sealing and insulating sheet 22, and the second electrode sheet 23 are processed according to this specification. In the case of electrode sheet 23, the radial dimensions of the first electrode receiving cavity 11 and the sealed insulating receiving cavity 12 are set to 8.5 mm to 24.8 mm, for example, 8.5 mm, 8.8 mm, 9 mm, 9.2 mm, 9.4 mm, 9.6 mm, 15 mm, 20 mm or 24.8 mm; the radial dimension of the second electrode receiving cavity 13 is set to 10.35 mm to 25 mm, for example, 10.35 mm, 12.5 mm, 15 mm, 17.5 mm, 20 mm, 22.5 mm or 25 mm, so that the first electrode receiving cavity 11 is larger than the first electrode sheet 21, the sealed insulating receiving cavity 12 is larger than the sealed insulating sheet 22, and the second electrode receiving cavity 13 is larger than the second electrode sheet 23. Alternatively, in other embodiments of this application, when the outer contours of the first electrode sheet 21, the sealing insulating sheet 22, and the second electrode sheet 23 processed by the hot-pressing composite equipment are all cylindrical, the cross-sectional contours of the first electrode receiving cavity 11 and the second electrode receiving cavity 13 may not be circular, but may be polygonal or elliptical. For example, the cross-sectional contour of the first electrode receiving cavity 11 may be a square, and the side length of the square may be 8.5mm, 8.8mm, 9mm, 9.2mm, 9.4mm, 9.6mm, 15mm, 20mm, or 24.8mm; the cross-sectional contour of the first electrode receiving cavity 11 may be an ellipse, and the minor axis of the ellipse may be 8.5mm, 8.8mm, 9mm, 9.2mm, 9.4mm, 9.6mm, 15mm, 20mm, or 24.8mm, so that the first electrode sheet 21 can be received and placed in the first electrode receiving cavity 11.In some embodiments of this application, other specifications and sizes of the first electrode sheet 21, sealing insulating sheet 22, and second electrode sheet 23 can also be processed. Specifically, the radial dimensions of the first electrode sheet 21 and the sealing insulating sheet 22 are set to 2.8mm to 20mm, for example, 2.8mm, 3.5mm, 4mm, 7mm, 12mm, 18mm, and 20mm; the radial dimensions of the second electrode sheet 23 are set to 3mm to 20.4mm, for example, 3mm, 4.5mm, 9mm, 15mm, 17mm, and 20.4mm, so that the specific values ​​fall within the range, and the radial dimension of the second electrode sheet 23 is at least 0.2mm larger than the radial dimension of the first electrode sheet 21. When the specifications and sizes of the first electrode sheet 21, the sealing insulating sheet 22, and the second electrode sheet 23 are changed, the design standards and selection rules of the first electrode receiving cavity 11, the sealing insulating receiving cavity 12, and the second electrode receiving cavity 13 are the same as described above, and will not be repeated here.

[0043] like Figure 4 As shown, Figure 4 This is a schematic diagram of an embodiment of the support fixture 10, lifting mechanism 30, and battery cap 20 of the present invention. The hot-pressing composite equipment also includes a hot-pressing section, which includes the lifting mechanism 30 and a heating mechanism disposed above the lifting mechanism 30. The lifting mechanism 30 includes a liftable push rod 31, which can extend into the through hole 14 and lift the first electrode sheet 21, thereby pressing the stacked first electrode sheet 21, sealing insulating sheet 22, and second electrode sheet 23 onto the heating mechanism. The first electrode sheet 21 and the second electrode sheet 23 are pressed against the sealing insulating sheet 22 by the clamping action, so that when the heating mechanism heats the second electrode sheet 23, the heat is more fully transferred to the sealing insulating sheet 22, so that the sealing insulating sheet 22 initially melts and then adheres to the second electrode sheet 23. In this way, the adhesion effect between the second electrode sheet 23 and the sealing insulating sheet 22 during the pressing process can be improved, thereby strengthening the pressing effect.

[0044] like Figure 7As shown, the depth direction of the first electrode receiving cavity 11, the sealed insulating receiving cavity 12, and the second electrode receiving cavity 13 is vertical, and the geometric centers of the cross sections of the first electrode receiving cavity 11, the sealed insulating receiving cavity 12, and the second electrode receiving cavity 13 are on the same straight line, so that the first electrode sheet 21, the sealed insulating sheet 22, and the second electrode sheet 23 are stacked in the vertical direction. It should be understood that this application does not limit the position of the axes of the first electrode receiving cavity 11, the sealing and insulating receiving cavity 12, and the second electrode receiving cavity 13. In the embodiments of this application, the first electrode sheet 21, the sealing and insulating sheet 22, and the second electrode sheet 23 are coaxially arranged. Therefore, in the embodiments of this application, the geometric centers of the cross sections of the first electrode receiving cavity 11, the sealing and insulating receiving cavity 12, and the second electrode receiving cavity 13 are on the same straight line. However, in other embodiments of this application, under the condition of satisfying the positioning relationship between the cavity and the part, the geometric centers of the cross sections of the first electrode receiving cavity 11, the sealing and insulating receiving cavity 12, and the second electrode receiving cavity 13 may not be on the same straight line. Alternatively, in some embodiments of this application, the first electrode sheet 21, the sealing and insulating sheet 22, and the second electrode sheet 23 are arranged with their axes offset. In this case, the first electrode receiving cavity 11, the sealing and insulating receiving cavity 12, and the second electrode receiving cavity 13 should be arranged according to the actual positions of the first electrode sheet 21, the sealing and insulating sheet 22, and the second electrode sheet 23 to ensure the installation accuracy between the first electrode sheet 21, the sealing and insulating sheet 22, and the second electrode sheet 23.

[0045] The first electrode receiving cavity 11, the sealed and insulated receiving cavity 12, and the second electrode receiving cavity 13 are connected vertically from bottom to top. The second electrode receiving cavity 13 penetrates the top surface of the supporting fixture 10, and the through hole 14 is located at the bottom of the first electrode receiving cavity 11 and penetrates the bottom surface of the supporting fixture 10. Preferably, as follows... Figure 7 As shown in the embodiments of this application, the depth direction of the through hole 14 is vertical, and the geometric centers of the cross-sections of the first electrode receiving cavity 11, the sealing and insulating receiving cavity 12, the second electrode receiving cavity 13, and the cross-section of the through hole 14 are on the same straight line. This makes the center of gravity of the battery cover 20 fall on the axis of the top rod 31, making the lifting and lowering process of the battery cover 20 more stable and avoiding the battery cover 20 from tilting and sliding due to instability of the center of gravity when lifting and lowering on the top rod 31, which would affect the positioning effect between the first electrode sheet 21, the sealing and insulating sheet 22, and the second electrode sheet 23. However, in some embodiments of this application, without considering the stability of the movement of the battery cover 20, the geometric center of the cross-section of the through hole 14 may not be on the axis of the first electrode receiving cavity 11, so that the projection of the geometric center of the battery cover 20 in the vertical direction is in the through hole 14, that is, the projection of the axis of the first electrode receiving cavity 11 in the vertical direction is in the through hole 14.

[0046] Specifically, the cross-section of the through hole 14 is circular with a diameter of 7.5 mm. However, this application does not limit the diameter of the through hole 14. In other embodiments of this application, when the first electrode sheet 21, the sealing insulating sheet 22, and the second electrode sheet 23 are of the same size and specifications, the diameter of the through hole 14 can be 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, or 8.45 mm, etc., so that the diameter of the through hole 14 is between 1.5 mm and 8.45 mm. At this time, it is ensured that the first electrode sheet 21 will not fall out of the through hole 14 and that the push rod 31 can be inserted. In some embodiments of this application, when the dimensions of the first electrode sheet 21, the sealing insulating sheet 22, and the second electrode sheet 23 are inconsistent with those of the embodiments in this application, the through hole 14 can also be selected in other sizes. Theoretically, the selected size range of the through hole 14 is 1.5mm to 24.8mm, such as 1.5mm, 5mm, 7.5mm, 12mm, 16.5mm, 19.5mm, and 24.8mm, so that the radial dimension of the through hole 14 is smaller than the radial dimension of the first electrode receiving cavity.

[0047] The cross-sectional shape and size of the lifting rod 31 of the lifting mechanism 30 can be consistent with the cross-sectional shape of the through hole 14 and slightly smaller than the diameter of the through hole 14, so as to increase the support area for the first electrode plate 21, thereby improving the support stability for the first electrode plate 21, the sealing insulating sheet 22 and the second electrode plate 23. Furthermore, since the geometric center of the cross-section of the through hole 14 is on the axis of the first electrode receiving cavity 11, the geometric center of the lifting rod 31 can be close to the geometric center of the first electrode plate 21. This makes the lifting process of the lifting rod 31 on the first electrode plate 21, the sealing insulating sheet 22 and the second electrode plate 23 more stable, preventing the first electrode plate 21, the sealing insulating sheet 22 and the second electrode plate 23 from falling off the lifting rod 31. It should be understood that this application does not limit the specific shape and size of the push rod 31. In other embodiments of this application, the push rod 31 may be significantly smaller than the diameter of the through hole 14 (e.g., half the diameter of the through hole 14). Alternatively, in some embodiments of this application, the cross-sectional shape of the push rod 31 may not be consistent with the cross-sectional shape of the through hole 14. The cross-section of the push rod 31 may be set as a polygon, ellipse, or ring, etc., so that the push rod 31 can penetrate and extend into the through hole 14.

[0048] For example, such as Figure 7 As shown, the second electrode receiving cavity 13 has a first chamfer 131 at the end away from the first electrode receiving cavity 11; the sealed and insulated receiving cavity 12 has a second chamfer 121 at the end away from the through hole 14; and the through hole 14 has a third chamfer 141 at the end away from the first electrode receiving cavity 11.

[0049] The first chamfer 131 and the second chamfer 121 can be set to 30° to 40°, for example, 35°. The setting of the first chamfer 131 and the second chamfer 121 can guide the sealing insulating sheet 22 and the second electrode sheet 23 when entering and exiting the sealing insulating receiving cavity 12 or the second electrode receiving cavity 13, which facilitates the placement of the sealing insulating sheet 22 and the second electrode sheet 23 and improves the fault tolerance. The third chamfer 141 can be set to 60° to 70°, for example, 68°. The third chamfer 141 can make it easier for the lifting rod 31 of the lifting mechanism 30 to extend into the through hole 14, so that the process of the lifting rod 31 lifting the first electrode sheet 21, the sealing insulating sheet 22 and the second electrode sheet 23 is smoother. It should be understood that in the embodiments of this application, the first electrode receiving cavity 11 and the sealing and insulating receiving cavity 12 are provided in the same cavity. Therefore, the side of the first electrode receiving cavity 11 near the sealing and insulating receiving cavity 12 is not chamfered. However, in some embodiments of this application, the outer contours of the first electrode sheet 21 and the sealing and insulating sheet 22 are not the same. In this case, the first electrode receiving cavity 11 and the sealing and insulating receiving cavity 12 are respectively set as two cavities with different cross-sectional sizes. Then, the side of the first electrode receiving cavity 11 near the sealing and insulating receiving cavity 12 can be chamfered to facilitate the first electrode sheet 21 entering the first electrode receiving cavity 11.

[0050] The number of the first electrode receiving cavity 11, the sealed and insulated receiving cavity 12, the second electrode receiving cavity 13, and the through hole 14 can be one, or two or more. For example,... Figure 3 As shown, there are three first electrode receiving cavity 11, three sealed and insulating receiving cavity 12, three second electrode receiving cavity 13, and three through holes 14. The first electrode receiving cavity 11, the sealed and insulating receiving cavity 12, and the second electrode receiving cavity 13 are sequentially connected. The through hole 14 is correspondingly located at the bottom of the first electrode receiving cavity 11. The three first electrode receiving cavities 11, 12, and 13 can accommodate three sets of first electrode plates 21, sealed and insulating plates 22, and second electrode plates 23.

[0051] It is understood that in the hot pressing section, the number and position of the push rods 31 correspond to the number and position of the first electrode receiving cavity 11, the sealed insulating receiving cavity 12, and the second electrode receiving cavity 13, so that the lifting mechanism 30 can simultaneously lift and heat the three sets of first electrode plates 21, sealed insulating plates 22, and second electrode plates 23 each time, thereby improving processing efficiency.

[0052] For example, such as Figure 2 As shown, Figure 2 for Figure 1A partial enlarged view at point A. The support fixture 10 is rectangular in shape. Three first electrode receiving cavities 11, a sealed and insulating receiving cavity 12, a second electrode receiving cavity 13, and a through hole 14 are spaced apart along the length of the support fixture 10. The support body 40 is provided with a mounting hole 41. The mounting hole 41 is a rectangular cavity structure that fits the outer contour of the support fixture 10. The side wall of the mounting hole 41 is provided with a mounting boss 42. The support fixture 10 is received in the mounting hole 41 and supported on the mounting boss 42. The edges of the support fixture 10 in the height direction form an angle 15. The edges of the mounting hole 41 are provided with clearance holes 411.

[0053] The mounting boss 42 is used for side overlap of the support fixture 10, thereby supporting the support fixture 10. After the support fixture 10 is inserted into the mounting hole 41, the top surface of the support fixture 10 is flush with the top surface of the support body 40, so the mounting hole 41 can position and protect the support fixture 10. The initial position of the lifting mechanism 30 of the preheating section is below the mounting hole 41. When it is necessary to heat the battery cap 20, the top rod 31 of the lifting mechanism 30 rises and extends into the support fixture 10. It should be noted that, in this embodiment, in order to facilitate the processing of the mounting hole 41 of the supporting body 40, one side of the mounting hole 41 is configured to communicate with the side of the supporting body 40, and the mounting boss 42 is provided on two opposite sidewalls of the mounting hole 41. However, this application does not limit the specific structure of the mounting hole 41. In other embodiments of this application, the mounting boss 42 can be provided on three sides of the mounting hole 41, or, while ensuring the installation strength of the supporting fixture 10, the mounting boss 42 can be provided on only one side of the mounting hole 41. The mounting hole 41 can also be located inside the supporting body 40. In this case, the mounting boss 42 can be provided on four sides of the mounting hole 41, and the mounting hole 41 does not need to be adapted to the outer contour of the supporting fixture 10. The mounting hole 41 can be designed in other shapes to achieve the setting of the mounting boss 42. On the other hand, in this embodiment, the mounting boss 42 is designed on the side wall of the mounting hole 41, which allows the support fixture 10 to be recessed and installed on the support body 40. This makes the assembly between the support fixture 10 and the support body 40 more aesthetically pleasing. Furthermore, the upper surface of the support fixture 10 is not higher than the upper surface of the support body 40, which can prevent collisions with the support fixture 10 when the conveying robot moves. The structural design is more reasonable. However, in some embodiments of this application, the support fixture 10 may not be embedded in the support body 40. The support fixture 10 can be installed by drilling screw holes directly on the support body 40. In this case, the processing of the support body 40 can be simplified. The support fixture 10 protrudes from the upper surface of the support body 40 for installation, thereby achieving the fixed installation of the support fixture 10 on the support body 40.

[0054] It should also be understood that this application does not limit the specific installation method of the support fixture 10 on the support body 40. In other embodiments of this application, the support fixture 10 can also be fixedly installed on the support body 40 by snap-fit ​​or riveting. In some embodiments of this application, the support fixture 10 and the support body 40 can also be integrally formed, thereby reducing the number of parts, so that the support fixture 10 can move under the drive of the support fixture 40.

[0055] The mounting hole 41 has a clearance hole 411 on its edge, allowing disassembly and assembly tools to be inserted to remove the support fixture 10. The edge of the support fixture 10 in the height direction is angled 15, increasing the contact area between the disassembly and assembly tools inserted into the clearance hole 411 and the support fixture 10, thereby improving the gripping stability of the support fixture 10 and increasing the efficiency of disassembly and assembly. Furthermore, the clearance hole 411 reduces the internal stress of the support body 40, preventing cracking of the support body 40 due to machining the mounting hole 41.

[0056] When in operation, the support fixture 10 is fixed to the support body 40. The support fixture 10 and the support body 40 can be fixed by snap-fit ​​or by fasteners. For example,... Figure 2 As shown, the support fixture 10 has an assembly hole 16 and a screw hole 421 on the mounting boss 42. The assembly hole 16 and the screw hole 421 are used for fasteners to pass through so that the support fixture 10 is fixedly installed on the support body 40.

[0057] The fastener can be a screw. After the fastener passes through the mounting hole 16, it engages with the screw hole 421, which simplifies the fixing method of the bearing fixture 10 and the bearing body 40 and facilitates the subsequent maintenance or replacement of the bearing fixture 10.

[0058] In the hot-pressing composite equipment of the present invention, a first electrode receiving cavity 11, a sealing and insulating receiving cavity 12, and a second electrode receiving cavity 13 are provided in the support fixture 10 to receive the stacked first electrode sheet 21, sealing and insulating sheet 22, and second electrode sheet 23; and a through hole 14 penetrating the support fixture 10 is provided at the bottom of the first electrode receiving cavity 11, so that during the preheating process, the lifting mechanism 30 of the preheating part can extend into the through hole 14 and lift the first electrode sheet 21, so that the sealing and insulating sheet 22 can effectively contact the second electrode sheet 23, thereby effectively bonding the second electrode sheet 23 and the sealing and insulating sheet 22 during the preheating process, thereby improving the bonding effect between the second electrode sheet 23 and the sealing and insulating sheet 22, and thus strengthening the subsequent pressing effect on the battery cap 20.

[0059] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A hot-pressing composite equipment, characterized in that, It includes a support body, a support fixture, a first electrode feeding section, a sealed and insulated feeding section, a second electrode feeding section, a limiting heating section, and a preheating section; The support fixture is mounted on the support body. The movement of the support body causes the support fixture to pass through the first electrode loading section, the sealed and insulated loading section, the second electrode loading section, the limiting heating section, and the preheating section. The support fixture is provided with a first electrode receiving cavity, a sealed and insulated receiving cavity, a second electrode receiving cavity and a through hole connected in sequence. The through hole is located at the bottom of the first electrode receiving cavity and penetrates the support fixture. The cross-sectional area of ​​the sealed and insulated feeding part is smaller than the cross-sectional area of ​​the second electrode receiving cavity and the difference in the outer dimension of one side is greater than 0.2 mm. When the support fixture passes through the first electrode loading section, the first electrode sheet carried by the first electrode loading section falls into the first electrode receiving cavity, and the line connecting the geometric center of the first electrode sheet and the geometric center of the first electrode receiving cavity is vertical. When the carrying fixture passes through the sealing and insulating feeding section, the sealing and insulating sheet carried by the sealing and insulating feeding section falls into the sealing and insulating receiving cavity, and the line connecting the geometric center of the sealing and insulating sheet and the geometric center of the sealing and insulating receiving cavity is vertical. When the support fixture passes through the limiting heating part, the limiting heating part heats the first electrode sheet to make the first electrode sheet bond with the sealing insulation sheet; When the carrying fixture passes through the second electrode loading section, the second electrode sheet carried by the second electrode loading section falls into the second electrode receiving cavity, and the line connecting the geometric center of the second electrode sheet and the geometric center of the second electrode receiving cavity is vertical. When the support fixture passes through the preheating section, the preheating section lifts the first electrode sheet until the sealing insulating sheet contacts the second electrode sheet, and the preheating section heats the second electrode sheet to make the second electrode sheet adhere to the sealing insulating sheet.

2. The hot-pressing composite equipment as described in claim 1, characterized in that, The depth direction of the first electrode receiving cavity, the sealed insulating receiving cavity, and the second electrode receiving cavity is vertical, and the geometric centers of the cross-sections of the first electrode receiving cavity, the sealed insulating receiving cavity, and the second electrode receiving cavity are on the same straight line, so that the first electrode sheet, the sealed insulating sheet, and the second electrode sheet are stacked in the vertical direction.

3. The hot-pressing composite equipment as described in claim 2, characterized in that, The cross-section of the sealed insulating cavity is the same in size and shape as the cross-section of the second electrode cavity.

4. The hot-pressing composite equipment as described in claim 2, characterized in that, The depth direction of the through hole is vertical, and the cross-sections of the first electrode receiving cavity, the sealed and insulating receiving cavity, the second electrode receiving cavity, and the geometric center of the through hole are on the same straight line.

5. The hot-pressing composite equipment as described in claim 4, characterized in that, The cross-sections of the first electrode receiving cavity, the sealed and insulated receiving cavity, the second electrode receiving cavity, and the through hole are circular.

6. The hot-pressing composite equipment as described in claim 5, characterized in that, The radial dimensions of the first electrode receiving cavity and the sealed insulating receiving cavity are set to be between 2.8 mm and 24.8 mm; The radial dimension of the second electrode receiving cavity is set to 3 mm to 25 mm; The cross-section of the through hole is circular, and the diameter is set to be between 1.5 mm and 24.6 mm; The radial dimensions of the second electrode receiving cavity, the radial dimensions of the first electrode receiving cavity, and the diameter of the through hole decrease sequentially.

7. The hot-pressing composite equipment as described in claim 4, characterized in that, The second electrode receiving cavity has a first chamfer at the end away from the first electrode receiving cavity; And / or, the sealed and insulated receiving cavity is provided with a second chamfer at the end away from the through hole; And / or, the end of the through hole away from the first electrode receiving cavity is provided with a third chamfer.

8. The hot-pressing composite equipment according to any one of claims 1 to 7, characterized in that, The number of the first electrode receiving cavity, the sealed and insulated receiving cavity, the second electrode receiving cavity, and the through hole are all three. The first electrode receiving cavity, the sealed and insulated receiving cavity, and the second electrode receiving cavity are sequentially connected. The through hole is correspondingly located at the bottom of the first electrode receiving cavity.

9. The hot-pressing composite equipment as described in claim 8, characterized in that, The support fixture is rectangular in shape, and three first electrode receiving cavities, the sealed and insulating receiving cavity, the second electrode receiving cavity and the through hole are spaced apart along the length of the support fixture. The support body is provided with a mounting hole, and the side wall of the mounting hole is provided with a mounting boss. The support fixture is received in the mounting hole and supported on the mounting boss. The edge of the support fixture in the height direction forms an angle, and the edge of the mounting hole is provided with a clearance hole.

10. The hot-pressing composite equipment as described in claim 9, characterized in that, The bearing fixture has an assembly hole, and the mounting boss has a screw hole. The assembly hole and the screw hole are used for fasteners to pass through, so that the bearing fixture is fixedly installed on the bearing body.

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