Front reinforcing device for die cutting

Abstract

The utility model discloses a die cutting front reinforcing device, relates to the technical field of lithium battery production equipment, and is used for processing pole pieces. The die-cutting front reinforcing device has a first direction, a second direction and a third direction which intersect in pairs, and comprises at least two embossing assemblies which are sequentially arranged in the first direction. The knurling assembly comprises a supporting roller and a knurling wheel; the axial direction of the supporting roller is parallel to the second direction; a gap for a pole piece to pass through is formed between the supporting roller and the embossing wheel; the knurling wheel is used for knurling the tab part of the pole piece penetrating through the gap; in each knurling assembly, the knurling wheel, the gap and the supporting roller are sequentially arranged in the third direction; and reinforcing rib patterns are arranged on the wheel surface of each knurling wheel. The die-cutting front reinforcing device provided by the utility model can effectively solve the problems that the tab part of the pole piece is insufficient in strength and the tab part is folded or crescent, effectively reduces the rejection rate, and can improve the production efficiency and the reliability of a finished product to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production equipment, in particular to a die-cutting pre-reinforcement device. Background Art

[0002] With the rapid development of the new energy industry, the demand gap for automotive power batteries is getting bigger and bigger, and power battery manufacturing plants at home and abroad are springing up like mushrooms after rain; the current performance requirements of high specific energy, high safety and long life are driving the lithium battery copper foil to develop in the direction of ultra-thinness, high tensile strength and high elongation; because the 4.5μm ultra-thin copper foil can increase the battery energy density by about 5% compared with the 6μm copper foil, and compared with the thicker copper foil, it can save about 10% of the copper foil required per GWh (gigawatt hour), so the front-end electrode section pays great attention to the application of 4.5μm copper foil, but there are pain points in the die-cutting section that make it difficult to speed up, resulting in insufficient equipment production capacity and manufacturing volume, affecting shipments, and the resulting folding of the pole ear and the crescent-shaped pole ear phenomenon may lead to problems such as reduced pole piece quality, low efficiency, and reduced life of the finished battery cell. Utility Model Content

[0003] The purpose of the utility model is to provide a die-cutting pre-reinforcement device to solve, to a certain extent, the technical problems existing in the prior art, such as quality degradation, low efficiency and shortened life of finished battery cells caused by thinning of pole pieces.

[0004] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0005] A die-cutting pre-reinforcement device for processing a pole piece, having a first direction, a second direction, and a third direction intersecting in pairs, the die-cutting pre-reinforcement device comprising at least two embossing assemblies sequentially spaced along the first direction;

[0006] Each of the embossing assemblies comprises a support roller and an embossing wheel; the axial direction of the support roller is parallel to the second direction; a gap is provided between the support roller and the embossing wheel for the pole piece to pass through; the embossing wheel is used to emboss the pole ear portion of the pole piece passing through the gap;

[0007] In each of the embossing assemblies, the embossing wheel, the gap and the support roller are arranged in sequence in the third direction;

[0008] The wheel surface of each embossing wheel is provided with a reinforcing rib pattern.

[0009] Optionally, the reinforcement rib pattern is at least one of an elliptical ring type, a polygonal boss type, a polygonal groove type, a round bar type and an oblique bar type.

[0010] Optionally, at the same end of the support roller, the reinforcing rib patterns of the embossing wheels of different embossing assemblies are the same or different;

[0011] In the same group of the embossing components, there are multiple embossing wheels, and the reinforcing rib patterns of different embossing wheels are the same or different.

[0012] Optionally, along the second direction, at one end of the embossing wheel close to the center of the supporting roller, the outer peripheral corner of the embossing wheel is rounded, and the wheel surface of the embossing wheel is smoothly connected to the reinforcing rib pattern by a curve transition.

[0013] Optionally, along the axial direction of the embossing wheel, the reinforcing rib pattern of the embossing wheel is configured to cover the pole ear portion of the pole piece; wherein the axial direction of the embossing wheel is parallel to the second direction.

[0014] Optionally, when the reinforcing rib pattern is in a diamond groove type or a diamond boss type, the wheel surface of the embossing wheel is provided with multiple rows and columns of diamonds arranged in a preset order, and the acute angle of the diamond is 30°-80°;

[0015] Optionally, when the reinforcing rib pattern is in the form of hexagonal grooves, the wheel surface of the embossing wheel is provided with multiple rows and columns of hexagonal grooves arranged in a preset order;

[0016] Optionally, when the reinforcing rib pattern is in the form of a circular strip, the wheel surface of the embossing wheel is provided with a plurality of annular protrusions or a plurality of annular grooves sequentially arranged along the axial direction of the embossing wheel; each of the annular protrusions or each of the annular grooves is coaxial with the embossing wheel; along the axial direction of the embossing wheel, the width of the annular protrusion or the annular groove is L, and the width L is 0.4 mm-0.8 mm;

[0017] Optionally, when the reinforcing rib pattern is in the form of oblique strips, the wheel surface of the embossing wheel is provided with a plurality of long strip protrusions or long strip grooves arranged at intervals along the circumference of the embossing wheel, and the angle between the extension direction of each of the long strip protrusions or each of the long strip grooves and the second direction is B, and the range of the angle B is 10°-20°.

[0018] Optionally, the die-cutting pre-reinforcement device further includes a guide rail assembly, a drive assembly and a frame;

[0019] The embossing assembly further includes a support; the embossing wheel is rotatably connected to the support;

[0020] The guide rail assembly includes a first guide rail, a second guide rail and a third guide rail; the first guide rail and the second guide rail both extend along the second direction; the third guide rail extends along the third direction; the first guide rail is mounted on the frame, one end of the drive assembly is connected to the first guide rail, and the other end is connected to the support, and the drive assembly can reciprocate along the first guide rail; the second guide rail is mounted on the frame and connected to the third guide rail, so that the third guide rail can reciprocate along the second direction; one end of the third guide rail is connected to the second guide rail, and the other end is connected to the support, so that the support can reciprocate along the third direction on the second guide rail;

[0021] The driving assembly includes a driving member; a fixed end of the driving member is connected to the first guide rail, and the driving end of the driving member is capable of abutting and driving the corresponding support to reciprocate along the third direction, thereby causing the embossing wheel to reciprocate along the third direction with the support, thereby changing the gap between the embossing wheel and the support roller;

[0022] The first guide rail is located on a first side of the support away from the support roller, the second guide rail and the third guide rail are both located on a second side of the support, and the first side of the support is adjacent to the second side.

[0023] Optionally, the support includes a connecting portion, a main body portion and two supporting ears;

[0024] The connecting portion and the two supporting ears are both connected to the main body; along the third direction, the connecting portion and the supporting ears are respectively located on both sides of the main body; along the second direction, the two supporting ears are respectively located between opposite ends of the connecting portion;

[0025] The connecting portion is connected to the third guide rail;

[0026] The embossing wheel is rotatably connected between the two supporting ears;

[0027] The driving member is capable of abutting against a surface of the main body facing away from the supporting ear portion; and along the first direction, the driving member and the third guide rail are located on opposite sides of the connecting portion.

[0028] Optionally, the ear portion includes a fixing portion and a disassembly portion, and the ear portion is provided with an axial hole for accommodating the embossing wheel axle;

[0029] One end of the fixing portion is fixedly connected to the main body, and the other end of the fixing portion is detachably connected to the disassembly portion. A portion of the shaft hole is provided on the fixing portion, and the other portion is provided on the disassembly portion.

[0030] Optionally, a first guide rail base for supporting the first guide rail and a second guide rail base for supporting the second guide rail are fixedly connected to the frame; the first guide rail base and the second guide rail base both extend along the second direction; the first guide rail base is located on a first side of the support away from the support roller, and the second guide rail base is located on a second side of the support, and the first side and the second side of the support are adjacent to each other;

[0031] The first guide rail includes several first sub-guide rails; the second guide rail includes several second sub-guide rails; in the same group of embossing components, all the first sub-guide rails are connected between the driving component and the first guide rail base, and all the second sub-guide rails are connected between the third guide rail and the second guide rail base.

[0032] The beneficial effects of the present invention are mainly:

[0033] The die-cutting pre-reinforcement device provided by the utility model comprises at least two embossing assemblies arranged in sequence along a first direction, each embossing assembly comprises a supporting roller and an embossing wheel, and a gap is provided between the supporting roller and the embossing wheel for the pole piece to pass through; a reinforcing rib pattern is provided on the wheel surface of the embossing wheel, that is, patterns are embossed on both sides of the pole piece, and the embossing wheel squeezes the pole ear portion of the pole piece passing through the gap so that the pole ear portion forms a reinforcing rib structure, so as to improve the problem of insufficient strength of the pole ear portion of the pole piece, folding or crescent shape of the pole ear portion, effectively reduce the scrap rate, and can improve the production efficiency and reliability of the finished product to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 A schematic structural diagram of a die-cutting pre-reinforcement device provided in an embodiment of the present invention;

[0036] Figure 2 for Figure 1 A partial enlarged view of the die-cutting front reinforcement device shown;

[0037] Figure 3 A schematic structural diagram of the die-cutting front reinforcement device provided by an embodiment of the present invention from another perspective;

[0038] Figure 4 A schematic structural diagram of a support provided in an embodiment of the present utility model;

[0039] Figure 5 A schematic diagram of the first structure of the embossing wheel provided in an embodiment of the present utility model;

[0040] Figure 6 for Figure 5 A cross-sectional view of the embossing wheel is shown;

[0041] Figure 7 A schematic diagram of the second structure of the embossing wheel provided in an embodiment of the present utility model;

[0042] Figure 8 for Figure 7 A cross-sectional view of the embossing wheel is shown;

[0043] Figure 9 A third structural schematic diagram of the embossing wheel provided in an embodiment of the present utility model;

[0044] Figure 10 for Figure 9 A cross-sectional view of the embossing wheel is shown;

[0045] Figure 11 A fourth structural schematic diagram of the embossing wheel provided in an embodiment of the present utility model;

[0046] Figure 12 for Figure 11 A cross-sectional view of the embossing wheel is shown;

[0047] Figure 13 for Figure 12 An enlarged view of area A of the embossing wheel is shown;

[0048] Figure 14 A fifth structural schematic diagram of the embossing wheel provided in an embodiment of the present utility model;

[0049] Figure 15 for Figure 14 A cross-sectional view of the embossing wheel is shown.

[0050] Icons: 100-embossing assembly; 110-embossing wheel; 120-support roller; 130-gap; 140-support; 141-connecting part; 142-main body; 143-ear part; 1431-fixing part; 1432-disassembly and assembly part; 1433-axis hole; 200-guide rail assembly; 210-first guide rail; 211-first sub-guide rail; 220-second guide rail; 221-second sub-guide rail; 230-third guide rail; 300-drive assembly; 310-drive member; 400-frame; 410-first guide rail base; 420-second guide rail base; 500-pole piece. DETAILED DESCRIPTION

[0051] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0052] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0054] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0055] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0056] Example

[0057] This embodiment provides a pre-die-cutting reinforcement device that can be used in the production of pole pieces, for example, to strengthen pole pieces before die-cutting, such as in the die-cutting of the front-end negative poles of lithium batteries. For example, the pre-die-cutting reinforcement device provided by this embodiment can be used to improve the insufficient strength of copper foil (such as 4.5μm or other thicknesses) and aluminum foil after embossing with the old-style pressing wheel, as well as the folding or crescent shape of the pole lugs.

[0058] Please refer to Figures 1-15 The die-cutting pre-reinforcement device provided in this embodiment is used to process the pole piece 500. The die-cutting pre-reinforcement device has a first direction, a second direction, and a third direction intersecting with each other; optionally, the first direction, the second direction, and the third direction are perpendicular to each other.

[0059] The die-cutting pre-reinforcement device includes at least two embossing assemblies 100 arranged in sequence along the first direction; each embossing assembly 100 includes a support roller 120 and an embossing wheel 110; the axial direction of the support roller 120 is parallel to the second direction; there is a gap 130 between the support roller 120 and the embossing wheel 110 for the pole piece 500 to pass through; the embossing wheel 110 is used to emboss the pole ear portion of the pole piece 500 passing through the gap 130. The pole ear portion of the pole piece 500 is pressed by the embossing wheel 110 so that the pole ear portion forms a specific structure. In this embodiment, the axial direction of the embossing wheel 110 can be parallel to the second direction, or it can have an angle with the second direction; optionally, the axial direction of the embossing wheel 110 is parallel to the second direction.

[0060] In each embossing assembly 100, the embossing wheel 110, the gap 130 and the support roller 120 are arranged in sequence in the third direction. In the third direction, the embossing wheel 110, the gap 130 and the support roller 120 are arranged in sequence, or the support roller 120, the gap 130 and the embossing wheel 110 are arranged in sequence, so that the pole piece 500 passing through the gap 130 can be pressed. During pressing, the embossing wheel 110 moves toward the direction close to the support roller 120, thereby squeezing the pole piece 500.

[0061] The embossing wheel 110 is provided with a reinforcing rib pattern on its wheel surface. The reinforcing rib pattern allows the electrode tabs 500 to form a corresponding pattern structure when the embossing wheel 110 embosses the electrode tabs 500. This helps to improve the strength of the electrode tabs 500 and improves issues such as insufficient strength, folded tabs, or crescent-shaped tabs.

[0062] The die-cutting pre-reinforcement device described in this embodiment includes at least two embossing components 100 arranged in sequence along the first direction, each embossing component 100 includes a supporting roller 120 and an embossing wheel 110, and there is a gap 130 between the supporting roller 120 and the embossing wheel 110 for the pole piece 500 to pass through; in two adjacent embossing components 100, along the third direction, the embossing wheel 110 of one embossing component 100 is arranged on the opposite side of the embossing wheel 110 of the other embossing component 100, and the wheel surface of the embossing wheel 110 is provided with a reinforcing rib pattern, that is, patterns are embossed on both sides of the pole piece 500 to improve the problem of insufficient strength of the pole ear part of the pole piece 500, the folding or crescent shape of the pole ear part, effectively reducing the scrap rate, and improving the production efficiency and reliability of the finished product to a certain extent.

[0063] Currently, the use of rollers with regular design patterns can no longer meet the needs of improving the strength of the pole lugs. According to field verification data, after using traditional reinforcing rib embossing, the pole lug folding rate (for a single roll) is still nearly 45% at low speeds (≤30m / min). The die-cutting pre-reinforcement device described in this embodiment can use a low-cost embossing design to change the existing pain points, and can well solve problems such as the folding of the pole lugs, improve the production line quality rate, reduce the scrap rate, improve production efficiency and reliability, save costs, and greatly promote the front-end die-cutting shipment problem in the lithium battery industry. For example, after using the die-cutting pre-reinforcement device described in this embodiment, the pole lug folding rate (for a single roll) can be controlled at 0.3% at high speeds (>60m / min).

[0064] See also Figure 5-Figure 15 As shown, in the optional solutions of this embodiment, the reinforcement rib pattern is at least one of an elliptical ring type, a polygonal boss type, a polygonal groove type, a round bar type and an oblique bar type; in this embodiment, the reinforcement rib pattern can also adopt other shapes.

[0065] In an optional solution of this embodiment, at the same end of the support roller 120, the reinforcing rib patterns of the embossing wheels 110 of different embossing assemblies 100 are the same or different. In this embodiment, at the same end of the support roller 120, the specific selection of the reinforcing rib patterns of the embossing wheels 110 of different embossing assemblies 100 can be determined based on factors such as the thickness of the foil material area of ​​the pole piece 500 and the processing technology. Optionally, at the same end of the support roller 120, the reinforcing rib patterns of the embossing wheels 110 of different embossing assemblies 100 are the same. By adopting the same reinforcing rib pattern, embossing and press-forming can be performed at positions substantially corresponding to both sides of the pole lug portion of the pole piece 500. Compared with embossing and press-forming on one side of the pole lug portion, the single embossing pressure force on the pole lug portion can be reduced, thereby reducing the risk of pole lug damage to a certain extent, and can effectively improve the stability of the embossing forming of the pole lug portion, and also reduce the possibility of the pole lug portion returning to a flat state after embossing. Optionally, at the same end of the support roller 120, the embossing wheels 110 of different embossing assemblies 100 have different reinforcing rib patterns; by adopting different reinforcing rib patterns, the special-shaped embossing staggered press forming can be realized on both sides of the pole piece 500, which is beneficial to increase the embossing area and form a mesh structure, thereby helping to improve the strength of the pole piece 500, and also helping to reduce the probability of the pole piece 500 having a crescent or folding on the pole ear after the pole piece is stripped and passed through the driven roller, effectively improving the problems of insufficient strength, folding or crescent shape of the pole ear of the pole piece 500.

[0066] In an optional solution of this embodiment, in the same set of embossing assemblies 100, there are multiple embossing wheels 110, and the reinforcing rib patterns of different embossing wheels 110 are the same or different. In this embodiment, in the same set of embossing assemblies 100, the specific selection of the reinforcing rib patterns of different embossing assemblies 100 can be determined based on factors such as the thickness of the foil material area of ​​the pole piece 500 and the processing technology. Optionally, in the same set of embossing assemblies 100, there are multiple embossing wheels 110, and the reinforcing rib patterns of different embossing wheels 110 are the same; by using the same reinforcing rib pattern of the embossing wheels 110 in the same set of embossing assemblies 100, it is convenient to debug and control multiple embossing wheels 110. Optionally, in the same group of embossing components 100, there are multiple embossing wheels 110, and the reinforcing rib patterns of different embossing wheels 110 are different; by using different reinforcing rib patterns of embossing wheels 110 in the same group of embossing components 100, adaptive adjustments can be made according to the ductility of the electrode material, for example, adaptive adjustments can be made according to the ductility of different positions of the electrode material corresponding to different embossing wheels 110.

[0067] In an optional solution of this embodiment, along the second direction, at one end of the embossing wheel 110 close to the center of the support roller 120, the outer peripheral corners of the embossing wheel 110 are chamfered, and the wheel surface of the embossing wheel 110 is smoothly connected to the reinforcing rib pattern by a curve. The die-cutting pre-reinforcement device of this embodiment reduces or avoids the influence of the embossing wheel 110 on the coating area of ​​the electrode 500 when the electrode 500 is pressed by designing the outer peripheral corners of the embossing wheel 110 close to the center of the support roller 120; and further reduces or avoids the influence of the embossing wheel 110 on the coating area of ​​the electrode 500 when the electrode 500 is pressed by designing the wheel surface of the embossing wheel 110 to be smoothly connected to the reinforcing rib pattern by a curve. That is to say, in the same set of embossing components 100, along the second direction, the two embossing wheels 110 are arranged at opposite ends of the support roller 120, and the area where the pole piece 500 is located between the two embossing wheels 110 is the coating area. The corners at the ends facing each other of the two embossing wheels 110 are designed to be chamfered, which can effectively reduce the rolling pressure on the coating area; and the parts where the two embossing wheels 110 are back to back to each other do not need to be designed to be chamfered.

[0068] In an alternative embodiment of this embodiment, the reinforcing rib pattern of the embossing wheel 110 is configured to cover the tab portion of the pole piece 500 along the axial direction of the embossing wheel 110. The axial direction of the embossing wheel 110 is parallel to the second direction. Covering the tab portion of the pole piece 500 with the reinforcing rib pattern of the embossing wheel 110 facilitates the embossing of the pattern on the tab portion of the pole piece 500 by the embossing wheel 110, thereby facilitating the improvement of the tab portion's strength.

[0069] In the optional solution of this embodiment, the reinforcement rib pattern is an elliptical ring shape, such as Figure 5 and Figure 6As shown, a plurality of elliptical rings are convexly provided on the wheel surface of the embossing wheel 110 , and the plurality of elliptical rings are arranged at intervals along the circumference of the embossing wheel 110 .

[0070] In an optional solution of this embodiment, when the reinforcing rib pattern is in the form of a diamond groove or a diamond boss, the wheel surface of the embossing wheel 110 is provided with multiple rows and columns of diamonds arranged in a preset order, and the acute angle of the diamond is 30°-80°; Figure 7 and Figure 8 The reinforcement rib pattern shown is a diamond-shaped boss. Optionally, the acute angle of the diamond is 30°, 45°, 60°, 70°, 75°, or 80°, or other angles. Optionally, along the axial direction of the embossing wheel 110, multiple diamonds on the wheel surface of the embossing wheel 110 cover the pole lugs of the pole piece 500, and the embossing wheel 110 and the diamond pattern are smoothly connected by a curved line.

[0071] In an optional solution of this embodiment, when the reinforcing rib pattern is in the form of hexagonal grooves, the wheel surface of the embossing wheel 110 is provided with multiple rows and columns of hexagonal grooves arranged in a preset order. In some embodiments, each pair of corresponding sides of the hexagon is parallel to each other. Optionally, each pair of corresponding sides of the hexagon is parallel to each other, and the internal angles of the hexagon are all obtuse angles; for example; the hexagon is a regular hexagon. Figure 9 and Figure 10 As shown, each pair of corresponding sides of the hexagon is parallel to each other, the internal angles of the hexagon are all obtuse angles, and the length of the shortest side of the hexagon is c, which ranges from 0.9 mm to 1.8 mm. Optionally, the length c is 0.9 mm, 1 mm, 1.3 mm, 1.5 mm, or 1.8 mm, or other values.

[0072] In the optional solution of this embodiment, when the reinforcing rib pattern is in the form of a circular strip, the wheel surface of the embossing wheel 110 is provided with a plurality of annular protrusions or annular grooves arranged in sequence along the axial direction of the embossing wheel 110; each annular protrusion or each annular groove is coaxial with the embossing wheel 110, that is, the annular protrusion is outer-circuited around the wheel surface of the embossing wheel 110, and the annular groove is embedded in the wheel surface of the embossing wheel 110 for a circle; along the axial direction of the embossing wheel 110, the width of the annular protrusion or annular groove is L, and the width L ranges from 0.4mm to 0.8mm. Optionally, the width L is 0.4mm, 0.5mm, 0.7mm, 0.8mm, or other values. Figure 11-13 As shown, the wheel surface of the embossing wheel 110 is provided with a plurality of annular protrusions arranged in sequence along the axial direction of the embossing wheel 110; each annular protrusion is coaxial with the embossing wheel 110; and the width of the annular protrusion is L.

[0073] In an optional solution of this embodiment, when the reinforcing rib pattern is in the form of oblique strips, the wheel surface of the embossing wheel 110 is provided with a plurality of long strip protrusions or long strip grooves arranged at intervals along the circumference of the embossing wheel 110, and the angle between the extension direction of each long strip protrusion or each long strip groove and the second direction is B, and the range of angle B is 10°-20°. Optionally, angle B is 10°, 13°, 15°, 17°, 20°, or other angles. Figure 14 and Figure 15 As shown, the axial direction of the embossing wheel 110 is parallel to the second direction, and the wheel surface of the embossing wheel 110 is provided with a plurality of elongated grooves arranged at intervals along the circumference of the embossing wheel 110, and the angle between the extension direction of each elongated groove and the second direction is B. In some embodiments, the elongated protrusions or elongated grooves arranged at intervals along the circumference of the embossing wheel 110 are uniformly spaced, so that the pole lug has a uniformly distributed reinforcement rib pattern structure.

[0074] See also Figure 1-Figure 3 As shown, in an optional solution of this embodiment, the die-cutting pre-reinforcement device further includes a guide rail assembly 200, a drive assembly 300, and a frame 400. The guide rail assembly 200 includes a first guide rail 210, a second guide rail 220, and a third guide rail 230. The first guide rail 210 and the second guide rail 220 both extend along the second direction; the third guide rail 230 extends along the third direction. The embossing assembly 100 also includes a support 140, to which the embossing wheel 110 is rotatably connected. In this embodiment, the number of embossing wheels 110 may be the same as or different from the number of supports 140, and each embossing wheel 110 may be rotatably connected to the corresponding support 140; optionally, the number of embossing wheels 110 is greater than the number of supports 140, for example, one support 140 can be installed with two embossing wheels 110; optionally, the number of embossing wheels 110 is less than the number of supports 140, for example, a single support 140 supports and connects one or two embossing wheels 110, and the surplus supports 140 are used as spares; optionally, the number of embossing wheels 110 is the same as the number of supports 140, and each support 140 supports and connects one embossing wheel 110.

[0075] The first guide rail 210 is installed on the frame 400, and one end of the driving component 300 is connected to the first guide rail 210 and the other end is connected to the support 140, so that the driving component 300 can reciprocate along the first guide rail 210 in the second direction; the second guide rail 220 is installed on the frame 400 and connected to the third guide rail 230, so that the third guide rail 230 can reciprocate along the second direction; one end of the third guide rail 230 is connected to the second guide rail 220 and the other end is connected to the support 140, so that the support 140 can reciprocate on the second guide rail 220 along the third direction; optionally, the number of third guide rails 230 is the same as the number of supports 140.

[0076] The drive assembly 300 includes a drive member 310; the fixed end of the drive member 310 is connected to the first guide rail 210, and the drive end of the drive member 310 can abut and drive the corresponding support 140 to reciprocate along the third direction, so that the embossing wheel 110 reciprocates along the third direction with the support 140, thereby changing the gap 130 between the embossing wheel 110 and the support roller 120. Optionally, the number of drive members 310 is consistent with the number of embossing wheels 110, that is, each embossing wheel 110 is driven by a drive member 310, which can adapt to different incoming electrode pieces 500, so as to facilitate the adjustment of a single embossing wheel 110, and further facilitate the adjustment of the distance between the support roller 120 and each embossing wheel 110, effectively ensuring the consistency of the embossing of the embossing wheel 110 and the stability of the force applied to the support roller 120.

[0077] Optionally, the first guide rail 210 is located on the first side of the support 140 away from the support roller 120, the second guide rail 220 and the third guide rail 230 are both located on the second side of the support 140, the first side of the support 140 is adjacent to the second side, and the first side is the end away from the support ear.

[0078] Optionally, in the same group of embossing components 100, the number of first guide rails 210 is one, and the fixed ends of all driving members 310 are connected to the same first guide rail 210; the number of second guide rails 220 is one, and all third guide rails 230 are connected to the same second guide rail 220, so that the supports 140 connected to the third guide rails 230 are all connected to the same second guide rail 220, and further, all embossing wheels 110 are connected to the same second guide rail 220.

[0079] The die-cutting pre-reinforcement device described in this embodiment enables the drive assembly 300 to reciprocate along the second direction on the frame 400 via the first guide rail 210, so that the drive assembly 300 can better drive the connected support 140. The third guide rail 230 is enabled to reciprocate along the second direction on the frame 400 via the second guide rail 220, that is, the support 140 connected to the third guide rail 230 is enabled to reciprocate along the second direction on the frame 400, thereby enabling the embossing wheel 110 to reciprocate along the second direction on the frame 400, so that the position of the embossing wheel 110 can better correspond to the pole ear portion of the pole piece 500. The third guide rail 230 enables the support 140 to reciprocate along the third direction, providing better guidance when the drive assembly 300 drives the support 140 to move, thereby improving the accuracy and stability of the support 140 during movement.

[0080] In this embodiment, the driving assembly 300 can be driven by pneumatic, electric or hydraulic means. Optionally, the driving member 310 includes a cylinder, a motor or a hydraulic cylinder.

[0081] See also Figure 4As shown, in an optional scheme of this embodiment, the support 140 includes a connecting portion 141, a main body 142 and two support ears 143; the connecting portion 141 and the two support ears 143 are all connected to the main body 142, and along the third direction, the connecting portion 141 and the support ears 143 are respectively located on both sides of the main body 142; along the second direction, the two support ears 143 are respectively provided at opposite ends of the connecting portion 141, that is, the connecting portion 141 is located between the two support ears 143; the connecting portion 141 is connected to the third guide rail 230; the embossing wheel 110 is rotatably connected between the two support ears 143; the driving member 310 can abut the surface of the main body 142 facing away from the support ears 143; along the first direction, the driving member 310 and the third guide rail 230 are located on opposite sides of the connecting portion 141. The support 140 includes a connecting portion 141 , a main body portion 142 and two supporting ears 143 , so that the support 140 supports and connects the embossing wheel 110 .

[0082] In this embodiment, the support 140 may also adopt other structures.

[0083] See also Figure 4 As shown, in an optional solution of this embodiment, the ear portion 143 includes a fixed portion 1431 and a disassembly portion 1432. The ear portion 143 defines an axial hole 1433 for accommodating the axle of the embossing wheel 110. One end of the fixed portion 1431 is fixedly connected to the main body 142, and the other end of the fixed portion 1431 is detachably connected to the disassembly portion 1432. A portion of the axial hole 1433 is provided on the fixed portion 1431, and another portion of the axial hole 1433 is provided on the disassembly portion 1432. The fixed portion 1431 and the disassembly portion 1432 are detachably connected, so that the axle of the embossing wheel 110 can be connected to the axial hole 1433.

[0084] See also Figure 1-Figure 3As shown, in an optional scheme of this embodiment, a first guide rail base 410 for supporting the first guide rail 210 and a second guide rail base 420 for supporting the second guide rail 220 are fixedly connected to the frame 400; the first guide rail base 410 and the second guide rail base 420 both extend along the second direction; the first guide rail base 410 is located on the first side of the support 140 away from the support roller 120, and the second guide rail base 420 is located on the second side of the support 140, and the first side and the second side of the support 140 are adjacent, that is, the first guide rail base 410 and the second guide rail base 420 are located on two adjacent sides of the support 140. The first guide rail 210 includes several first sub-guide rails 211; the second guide rail 220 includes several second sub-guide rails 221; in the same group of embossing components 100, the driving component 300 is slidably connected to the first guide rail base 410 through all the first sub-guide rails 211, that is, all the first sub-guide rails 211 are connected between the driving component 300 and the first guide rail base 410, and the third guide rail 230 is slidably connected to the second guide rail base 420 through all the second sub-guide rails 221, that is, all the second sub-guide rails 221 are connected between the third guide rail 230 and the second guide rail base 420. Through the first guide rail base 410 and the first sub-guide rail 211, the drive assembly 300 can be slidably connected to the frame 400; through the second guide rail base 420 and the second sub-guide rail 221, the third guide rail 230 can be slidably connected to the frame 400, thereby facilitating the support 140 connected to the third guide rail 230 to be slidably connected to the frame 400.

[0085] Optionally, in the same embossing assembly 100, there are one or more first sub-guide rails 211 and one or more second sub-guide rails 221. By using the first sub-guide rails 211 and the second sub-guide rails 221, various widths of pole sheet materials can be accommodated.

[0086] The pre-die-cutting reinforcement device of this embodiment uses a drive assembly 300 to drive the embossing wheel 110 to emboss the tabs of the electrode 500, making it suitable for electrode materials of varying widths. The drive assembly 300 is mounted directly on the first guide rail 210 or via an adapter, allowing for adjustment in the width direction and a locking knob to secure the drive assembly 300. The fixed portion 1431 and the disassembly portion 1432 provide a detachable connection, enabling quick replacement of the embossing wheel 110.

[0087] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A die-cutting pre-strengthening device for processing a pole piece (500), characterized in that: It has a first direction, a second direction and a third direction intersecting in pairs, and the die-cutting pre-reinforcement device comprises at least two embossing assemblies (100) sequentially spaced along the first direction; Each of the embossing assemblies (100) comprises a supporting roller (120) and an embossing wheel (110); the axial direction of the supporting roller (120) is parallel to the second direction; a gap (130) is provided between the supporting roller (120) and the embossing wheel (110) for the pole piece (500) to pass through; the embossing wheel (110) is used to perform embossing on the pole ear portion of the pole piece (500) passing through the gap (130); In each of the embossing assemblies (100), the embossing wheel (110), the gap (130) and the support roller (120) are arranged in sequence in the third direction; The wheel surface of each embossing wheel (110) is provided with a reinforcing rib pattern.

2. The die-cutting pre-reinforcement device according to claim 1, characterized in that: The reinforcing rib pattern is at least one of an elliptical ring type, a polygonal boss type, a polygonal groove type, a round bar type and an oblique bar type.

3. The die-cutting pre-reinforcement device according to claim 2, characterized in that: At the same end of the support roller (120), the reinforcing rib patterns of the embossing wheels (110) of different embossing assemblies (100) are the same or different; In the same group of the embossing components (100), the number of the embossing wheels (110) is multiple, and the reinforcing rib patterns of different embossing wheels (110) are the same or different.

4. The die-cutting pre-reinforcement device according to claim 2, characterized in that: Along the second direction, at one end of the embossing wheel (110) close to the center of the supporting roller (120), the outer peripheral corner of the embossing wheel (110) is rounded, and the wheel surface of the embossing wheel (110) is connected to the reinforcing rib pattern in a smooth curve transition.

5. The die-cutting pre-reinforcement device according to claim 2, characterized in that: Along the axial direction of the embossing wheel (110), the reinforcing rib pattern of the embossing wheel (110) is configured to cover the pole ear portion of the pole piece (500); wherein the axial direction of the embossing wheel (110) is parallel to the second direction.

6. The die-cutting pre-reinforcement device according to claim 5, characterized in that: When the reinforcing rib pattern is in a rhombus groove type or a rhombus boss type, the wheel surface of the embossing wheel (110) is provided with multiple rows and columns of rhombuses arranged in a preset order, and the acute angle of the rhombus is 30°-80°; When the reinforcing rib pattern is in the form of a hexagonal groove, the wheel surface of the embossing wheel (110) is provided with multiple rows and columns of hexagonal grooves arranged in a preset order; When the reinforcing rib pattern is in the form of a circular strip, a plurality of annular protrusions or a plurality of annular grooves are arranged in sequence along the axial direction of the embossing wheel (110) on the wheel surface of the embossing wheel (110); each of the annular protrusions or each of the annular grooves is coaxial with the embossing wheel (110); along the axial direction of the embossing wheel (110), the width of the annular protrusion or the annular groove is L, and the width L ranges from 0.4 mm to 0.8 mm; When the reinforcing rib pattern is in the form of oblique strips, a plurality of long strip protrusions or long strip grooves are arranged on the wheel surface of the embossing wheel (110) at intervals along the circumference of the embossing wheel (110), and the angle between the extension direction of each of the long strip protrusions or each of the long strip grooves and the second direction is B, and the range of the angle B is 10°-20°.

7. The die-cutting pre-reinforcement device according to any one of claims 1 to 6, characterized in that: The die-cutting pre-reinforcement device further comprises a guide rail assembly (200), a drive assembly (300) and a frame (400); The embossing assembly (100) further includes a support (140); the embossing wheel (110) is rotatably connected to the support (140); The guide rail assembly (200) comprises a first guide rail (210), a second guide rail (220) and a third guide rail (230); the first guide rail (210) and the second guide rail (220) both extend along the second direction; the third guide rail (230) extends along the third direction; the first guide rail (210) is mounted on the frame (400), one end of the drive assembly (300) is connected to the first guide rail (210), and the other end is connected to the support (140); the drive assembly (300) The member (300) can reciprocate along the first guide rail (210); the second guide rail (220) is mounted on the frame (400) and connected to the third guide rail (230), so that the third guide rail (230) can reciprocate along the second direction; one end of the third guide rail (230) is connected to the second guide rail (220), and the other end is connected to the support (140), so that the support (140) can reciprocate along the third direction on the second guide rail (220); The driving assembly (300) includes a driving member (310); a fixed end of the driving member (310) is connected to the first guide rail (210), and the driving end of the driving member (310) is capable of abutting and driving the corresponding support (140) to move back and forth along the third direction, thereby causing the embossing wheel (110) to move back and forth along the third direction along with the support (140), thereby changing the gap (130) between the embossing wheel (110) and the support roller (120); The first guide rail (210) is located on a first side of the support (140) away from the support roller (120), the second guide rail (220) and the third guide rail (230) are both located on a second side of the support (140), and the first side of the support (140) is adjacent to the second side.

8. The die-cutting pre-reinforcement device according to claim 7, characterized in that: The support (140) includes a connecting portion (141), a main body portion (142) and two supporting ears (143); The connecting portion (141) and the two supporting ears (143) are both connected to the main body (142); along the third direction, the connecting portion (141) and the supporting ears (143) are respectively located on both sides of the main body (142); along the second direction, the two supporting ears (143) are respectively located at opposite ends of the connecting portion (141); The connecting portion (141) is connected to the third guide rail (230); The embossing wheel (110) is rotatably connected between the two supporting ears (143); The driving member (310) is capable of abutting against the surface of the main body (142) facing away from the supporting ear (143); and along the first direction, the driving member (310) and the third guide rail (230) are located on opposite sides of the connecting portion (141).

9. The die-cutting pre-reinforcement device according to claim 8, characterized in that: The ear portion (143) includes a fixing portion (1431) and a disassembly portion (1432), and the ear portion (143) is provided with an axial hole (1433) for accommodating the axle of the embossing wheel (110); One end of the fixing portion (1431) is fixedly connected to the main body portion (142), and the other end corresponding to the fixing portion (1431) is detachably connected to the disassembly portion (1432), and a part of the shaft hole (1433) is arranged on the fixing portion (1431), and the other part is arranged on the disassembly portion (1432).

10. The die-cutting pre-reinforcement device according to claim 7, characterized in that: A first guide rail base (410) for supporting the first guide rail (210) and a second guide rail base (420) for supporting the second guide rail (220) are fixedly connected to the frame (400); the first guide rail base (410) and the second guide rail base (420) both extend along the second direction; the first guide rail base (410) is located on a first side of the support (140), and the second guide rail base (420) is located on a second side of the support (140), and the first side and the second side of the support (140) are adjacent to each other; The first guide rail (210) includes a plurality of first sub-guide rails (211); the second guide rail (220) includes a plurality of second sub-guide rails (221); in the same group of the embossing components (100), all the first sub-guide rails (211) are connected between the driving component (300) and the first guide rail base (410), and all the second sub-guide rails (221) are connected between the third guide rail (230) and the second guide rail base (420).

Images