Die cutting device and pole piece manufacturing equipment

Abstract

The utility model discloses a die cutting device and pole piece manufacturing equipment. The die cutting device comprises a cutting mechanism, a detecting mechanism and an adjusting mechanism. The cutting mechanism is provided with a cutting position, and the cutting mechanism is configured to cut the pole piece when the cutting mechanism is located at the cutting position. And the cutting mechanism is positioned at the downstream of the detection mechanism along the tape running direction of the pole piece. The detection mechanism is used for measuring the distance between the detection mechanism and the pole piece in the first direction, and the first direction is perpendicular to the tape conveying direction. The adjusting mechanism is connected with the cutting mechanism and electrically connected with the detecting mechanism. And the adjusting mechanism is used for obtaining a distance signal measured by the detection mechanism and driving the cutting mechanism to move in the first direction so as to adjust the cutting mechanism to the cutting position. And when the pole piece passes through the cutting mechanism along the first direction, the cutting mechanism is positioned in the cutting position relative to the section of pole piece. Therefore, the risk of scrapping the pole piece is reduced, and the production cost of the battery is further reduced.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing, and more specifically, to a die-cutting device and pole piece manufacturing equipment. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In the development of battery technology, in addition to improving battery reliability, how to reduce battery production costs is also a technical problem that needs to be solved urgently. Utility Model Content

[0004] In view of the above problems, the embodiments of the present application provide a die-cutting device and a pole piece manufacturing equipment, which can reduce the production cost of the battery.

[0005] In a first aspect, an embodiment of the present application provides a die-cutting device including a cutting mechanism, a detection mechanism and an adjustment mechanism. The cutting mechanism has a cutting position, and the cutting mechanism is configured to cut the pole piece when the cutting mechanism is at the cutting position. Along the tape running direction of the pole piece, the cutting mechanism is located downstream of the detection mechanism. The detection mechanism is used to measure the distance between the detection mechanism and the pole piece in a first direction, and the first direction is perpendicular to the tape running direction. The adjustment mechanism is connected to the cutting mechanism and is electrically connected to the detection mechanism. The adjustment mechanism is used to obtain a distance signal measured by the detection mechanism, and the adjustment mechanism is used to drive the cutting mechanism to move along the first direction to adjust the cutting mechanism to the cutting position.

[0006] In the technical solution of the embodiment of the present application, the detection mechanism along the pole piece's tape-walking direction is located upstream of the cutting mechanism to measure the distance between a section of the pole piece that will pass through the cutting mechanism and the detection mechanism in the first direction. Then the adjustment mechanism obtains the distance signal measured by the detection mechanism, adjusts the position of the cutting mechanism in the first direction, and then when the section of the pole piece passes through the cutting mechanism along the first direction, the cutting mechanism is located in the cutting position relative to the section of the pole piece. This reduces the risk of the pole piece not being cut off due to the cutting mechanism not being in the cutting position, thereby reducing the risk of the pole piece being scrapped, and thereby reducing the production cost of the battery.

[0007] In the technical solution of the embodiment of the present application, the cutting mechanism is a laser cutting mechanism, which is used to provide a laser extending along a first direction to cut the pole piece.

[0008] In the technical solution of the embodiment of the present application, a laser cutting mechanism is used as a cutting mechanism, so that the pole piece is processed by laser cutting, so as to improve the accuracy of pole piece die cutting and pole piece slitting, improve the quality of the pole piece, and further improve the quality of the battery.

[0009] In the technical solution of the embodiment of the present application, the die-cutting device further includes a base and a sliding member. The base is located on one side of the pole piece, and the detection mechanism and the adjustment mechanism are both arranged on the base. The sliding member is slidably arranged on the base along a first direction, the cutting mechanism is arranged on the sliding member, and the adjustment mechanism is connected to the sliding member and is used to drive the sliding member to move along the first direction.

[0010] In the above scheme, the detection mechanism and the adjustment mechanism are arranged on the base, and the cutting mechanism is slidably arranged on the base along the first direction through the sliding member, thereby increasing the integration of the die-cutting device, thereby facilitating the installation of the die-cutting device. The adjustment mechanism drives the sliding member to move along the first direction to adjust the distance between the cutting mechanism and the pole piece along the first direction, which is easy to achieve.

[0011] In the technical solution of the embodiment of the present application, the adjustment mechanism includes a transmission screw and a driving component. The transmission screw extends along a first direction, and the sliding member is threadedly connected to the transmission screw. The driving component is used to drive the transmission screw to rotate.

[0012] In the above solution, the driving component controls the rotation of the transmission screw, thereby driving the sliding member to move relative to the base in the first direction, and then when the pole piece passes through the cutting mechanism in the first direction, the cutting mechanism is located in the cutting position relative to the pole piece. This reduces the risk of the pole piece not being cut off due to the cutting mechanism not being in the cutting position, thereby reducing the risk of the pole piece being scrapped, and thereby reducing the production cost of the battery.

[0013] In the technical solution of the embodiment of the present application, the die-cutting device also includes a plurality of rollers, which are spaced apart along the belt feeding direction, and the rollers are used to transport the pole pieces.

[0014] In the above scheme, there are multiple conveying rollers. By providing multiple conveying rollers, the pole piece can be fully supported, thereby reducing the risk of deformation and wrinkling of the pole piece during the conveying process.

[0015] In the technical solution of the embodiment of the present application, the die-cutting device further comprises a negative pressure component. Along the first direction, the cutting mechanism, the pole piece and the negative pressure component are arranged in sequence. The negative pressure component is used to generate negative pressure to adsorb the pole piece.

[0016] In the above scheme, by arranging the cutting mechanism, the pole piece and the negative pressure component in sequence along the first direction, the negative pressure component can adsorb the side of the pole piece away from the cutting mechanism in the first direction, thereby limiting the shaking of the pole piece in the first direction when the cutting mechanism cuts the pole piece. This reduces the risk of the pole piece not being cut off due to the cutting mechanism not being in the cutting position, thereby reducing the risk of the pole piece being scrapped, and thereby reducing the production cost of the battery.

[0017] In the technical solution of the embodiment of the present application, along the first direction, the negative pressure component has an air inlet surface facing the pole piece, and a plurality of air inlet holes are arranged on the air inlet surface.

[0018] In the above solution, the negative pressure component drives the air between the pole piece and the air inlet surface along the first direction into the multiple air inlet holes to form a negative pressure between the pole piece and the air inlet surface, thereby limiting the movement of the pole piece along the first direction.

[0019] In the technical solution of the embodiment of the present application, the die-cutting device includes a tensioning member, which abuts against a side of the pole piece facing the detection mechanism in the first direction to tension the pole piece. Along the running direction of the pole piece, the detection mechanism is located downstream of the tensioning member.

[0020] In the above scheme, along the running direction of the pole piece, the detection mechanism is located downstream of the tensioning member. The tensioning member abuts against the side of the pole piece facing the detection mechanism in the first direction, so that the pole piece is tensioned, and then the pole piece is detected by the detection mechanism in the tensioned state, which is beneficial to improving the accuracy of the detection mechanism in measuring the distance between the detection mechanism and the pole piece in the first direction.

[0021] In the technical solution of the embodiment of the present application, the tensioning member is cylindrical, and the axis of the tensioning member, the first direction and the tape running direction are perpendicular to each other.

[0022] In the above solution, the tensioning member is cylindrical and the axis, the first direction and the tape running direction of the tensioning member are perpendicular to each other, so that the peripheral side of the tensioning member abuts against the pole piece, thereby reducing the risk of the tensioning member scratching the pole piece.

[0023] In the technical solution of the embodiment of the present application, the detection mechanism is located between the tensioning member and the negative pressure member along the tape running direction of the pole piece.

[0024] In the above scheme, the detection mechanism is located between the tensioning member and the negative pressure member along the running direction of the pole piece. Then, the pole pieces located on both sides of the detection mechanism along the running direction of the pole piece are restricted in the first direction by the tensioning member and the negative pressure member, respectively, which is beneficial to improving the accuracy of the detection mechanism in measuring the distance between the detection mechanism and the pole piece in the first direction.

[0025] In a second aspect, an embodiment of the present application provides a pole piece manufacturing device including a die-cutting device provided by any embodiment of the first aspect.

[0026] In the above technical solution, since the pole piece manufacturing equipment includes the die-cutting device in the first aspect embodiment, the pole piece manufacturing equipment also has the beneficial effects in the first aspect embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the structure of a die-cutting device provided in some embodiments of the present application;

[0029] Figure 2 A schematic diagram of the structure of a die-cutting device after a pole piece moves along a tape-feeding direction provided in some embodiments of the present application;

[0030] Figure 3 A schematic diagram of the structure of a pole piece provided in some embodiments of the present application;

[0031] Figure 4 A schematic structural diagram of a second die-cutting device provided in some embodiments of the present application;

[0032] Figure 5 A schematic structural diagram of a third die-cutting device provided for some embodiments of the present application.

[0033] Icon: 100-die cutting device;

[0034] 10-cutting mechanism; 11-laser;

[0035] 20- Testing agency;

[0036] 30-adjusting mechanism; 31-transmission screw; 32-driving component;

[0037] 40-base; 41-sliding member;

[0038] 50-pole piece; 51-coating area; 52-uncoated area; 52A-cutting part; 52B-pole ear;

[0039] 60-roller; 61-negative pressure component; 62-tensioning member. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0042] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0043] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0045] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0046] The term "plurality" used in the present application refers to two or more (including two).

[0047] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0048] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0049] The core component of the battery that can achieve repeated charge and discharge functions is the electrode assembly in the battery cell. The electrode assembly includes a pole piece and a separator. The pole piece includes a positive pole piece and a negative pole piece. The separator is usually arranged between the positive pole piece and the negative pole piece to insulate the positive pole piece and the negative pole piece from each other. The material of the separator can be PP (polypropylene) or PE (polyethylene). The battery cell mainly relies on the movement of metal ions between the positive pole piece and the negative pole piece to work. Among them, the pole piece includes a current collector and an active material layer. The current collector has a coating area coated with an active material layer and an uncoated area not coated with an active material layer along the width direction of the pole piece. The pole ear is cut out on the current collector not coated with the active material layer, and the pole ear realizes the charging and discharging of the electrode assembly. The current collector can be a metal foil, such as copper foil, aluminum foil, etc. In the manufacturing process of the pole piece, there are a die-cutting process and a slitting process. The die-cutting process is the process of cutting the pole ear on the pole piece using a die-cutting device.

[0050] When the die-cutting device cuts the uncoated area of ​​the pole piece, it generally cuts through a cutting mechanism, and the uncoated area of ​​the pole piece is cut by moving the pole piece relative to the cutting mechanism so that the cutting mechanism moves relative to the uncoated area of ​​the pole piece.

[0051] After the active material layer is coated, the active material layer needs to be cold pressed to make the thickness of the coating area uniform. When the coating area is cold pressed, the current collector in the coating area will be stretched, and if the current collector in the uncoated area has not been stretched before, the pole piece will be wrinkled as a whole. Therefore, the current collector in the uncoated area is generally pre-stretched, and the pre-stretched length is slightly longer than the length of the current collector in the coated area stretched after cold pressing. To reduce the risk of overall wrinkling of the pole piece. However, since the pre-stretched length of the current collector in the uncoated area is slightly longer than the length of the current collector in the coated area stretched after cold pressing, the current collector in the uncoated area will be partially wrinkled. As a result, when the cutting mechanism moves relative to the current collector in the uncoated area, the current collector is separated from the cutting position of the cutting mechanism, resulting in the pole piece not being cut off, thereby causing the pole piece to be discarded.

[0052] The die-cutting device in the related art can only discover that the current collector has detached from the cutting position of the cutting mechanism after the pole piece has not been cut off, and then the cutting mechanism can be adjusted. At this time, the pole piece has not been cut off, resulting in the pole piece being discarded, and the loss has already occurred.

[0053] In view of this, in order to reduce the risk of the pole piece not being cut off due to the pole piece being out of the cutting position of the cutting mechanism, the risk of the pole piece being scrapped is reduced, thereby reducing the production cost of the battery.

[0054] The present application provides a die-cutting device including a cutting mechanism, a detection mechanism and an adjustment mechanism. The cutting mechanism has a cutting position, and the cutting mechanism is configured to cut the pole piece when the cutting mechanism is at the cutting position. Along the tape-feeding direction of the pole piece, the cutting mechanism is located downstream of the detection mechanism. The detection mechanism is used to measure the distance between the detection mechanism and the pole piece in a first direction, and the first direction is perpendicular to the tape-feeding direction. The adjustment mechanism is connected to the cutting mechanism and electrically connected to the detection mechanism. The adjustment mechanism is used to obtain the distance signal measured by the detection mechanism, and the adjustment mechanism is used to drive the cutting mechanism to move along the first direction to adjust the cutting mechanism to the cutting position, so that when the pole piece passes through the cutting mechanism along the first direction, the cutting mechanism is located in the cutting position relative to the pole piece. Thereby reducing the risk of the pole piece not being cut off due to the cutting mechanism not being in the cutting position, thereby reducing the risk of the pole piece being scrapped, and thereby reducing the production cost of the battery.

[0055] The specific structure of the die-cutting device is described in detail below in conjunction with the accompanying drawings.

[0056] According to some embodiments of this application, please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of a die-cutting device 100 provided in some embodiments of the present application. Figure 2 This is a schematic structural diagram of a die-cutting device 100 after a pole piece 50 has moved along a tape-feeding direction Y provided in some embodiments of the present application. Figure 3 A schematic diagram of the structure of the pole piece 50 provided in some embodiments of the present application.

[0057] The embodiment of the present application provides a die-cutting device 100 including a cutting mechanism 10, a detection mechanism 20 and an adjustment mechanism 30. The cutting mechanism 10 has a cutting position, and the cutting mechanism 10 is configured to cut the pole piece 50 when the cutting mechanism 10 is located at the cutting position. Along the tape running direction Y of the pole piece 50, the cutting mechanism 10 is located downstream of the detection mechanism 20. The detection mechanism 20 is used to measure the distance between the detection mechanism 20 and the pole piece 50 in a first direction X, and the first direction X is perpendicular to the tape running direction Y. The adjustment mechanism 30 is connected to the cutting mechanism 10 and is electrically connected to the detection mechanism 20. The adjustment mechanism 30 is used to obtain the distance signal measured by the detection mechanism 20, and the adjustment mechanism 30 is used to drive the cutting mechanism 10 to move along the first direction X to adjust the cutting mechanism 10 to the cutting position.

[0058] In some embodiments, the first direction X may be a vertical direction, and the tape running direction Y and the width direction Z of the pole piece 50 may be planar directions, wherein the tape running direction Y is perpendicular to the width direction Z of the pole piece 50. It can be understood that the first direction X, the tape running direction Y and the width direction Z of the pole piece 50 are perpendicular to each other.

[0059] The pole piece 50 is a component used to form an electrode assembly in a battery cell.

[0060] In some embodiments, reference Figure 3 The pole piece 50 includes a current collector and an active material layer. The current collector has a coating region 51 coated with the active material layer and an uncoated region 52 not coated with the active material layer along the width direction Z of the pole piece 50 .

[0061] When the pole piece 50 is used as the positive electrode in the electrode assembly, as an example, the active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries can also be used. These positive electrode active materials can be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include, but are not limited to, lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and at least one of a composite material of lithium iron manganese phosphate and carbon.

[0062] When the pole piece 50 is used as the negative electrode in the electrode assembly, as an example, the active material may adopt the negative electrode active material for battery cells known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0063] The cut portion 52A is removed by cutting on the uncoated area 52, so that the remaining uncoated area 52 serves as the tab 52B, and the tab 52B realizes the charging and discharging of the electrode assembly. Figure 3In the figure, the range of the cutting portion 52A and the tab 52B is marked by dotted lines. It should be noted that the dotted lines and pattern filling are only for the convenience of showing the range of the cutting portion 52A and the tab 52B, and do not represent any physical meaning.

[0064] The cutting mechanism 10 is a mechanism in the die-cutting device 100 for removing the cutting portion 52A of the uncoated area 52 to form the tab 52B.

[0065] Exemplarily, the cutting mechanism 10 may be a laser cutting mechanism, or a cutting mechanism 10 with a cutting knife.

[0066] In the embodiment where the cutting mechanism 10 is a laser cutting mechanism, the laser cutting mechanism is used to provide the laser 11 to cut and remove the cutting portion 52A of the uncoated area 52 to form the tab 52B.

[0067] In an embodiment of the cutting mechanism 10 with a cutter, the cutter has a blade extending along a first direction X. When the cutter is inserted into the pole piece 50, the blade is located on the side that first abuts against the pole piece 50 along the running direction Y. The blade of the cutter of the cutting mechanism 10 is inserted into the cutting portion 52A of the uncoated area 52, and the pole piece 50 is moved relative to the cutter along the running direction Y to remove the cutting portion 52A of the uncoated area 52 to form a pole ear 52B.

[0068] The cutting position is an area in the first direction X where the cutting mechanism 10 can remove or cut the cutting portion 52A of the pole piece 50 .

[0069] In the embodiment where the cutting mechanism 10 is a laser cutting mechanism, refer to Figure 1 and Figure 2 The cutting position of the laser cutting mechanism can be understood as when the laser cutting mechanism is located in this area, the distance between the focus of the laser cutting mechanism and the cutting portion 52A of the pole piece 50 in the first direction X is small, so that the laser 11 emitted by the laser cutting mechanism can be better concentrated on the pole piece 50 or near the pole piece 50, so as to facilitate cutting the cutting portion 52A of the pole piece 50.

[0070] In an embodiment where the cutting mechanism 10 is a cutting mechanism 10 with a cutter, the cutting position of the cutting mechanism 10 with a cutter can be understood as the blade of the cutter being able to completely penetrate the cutting portion 52A of the pole piece 50 along the first direction X, so that the cutting portion 52A can be fully cut.

[0071] The detection mechanism 20 is a mechanism in the die-cutting device 100 for measuring the distance between the detection mechanism 20 and the cutting portion 52A of the pole piece 50 in the first direction X.

[0072] Exemplarily, the detection mechanism 20 may be an ultrasonic ranging sensor and / or a laser ranging sensor.

[0073] The adjustment mechanism 30 is a mechanism in the die-cutting device 100 for driving the cutting mechanism 10 to reciprocate along the first direction X.

[0074] Exemplarily, the adjustment mechanism 30 may be an electrical mechanism such as an electric telescopic rod, a cylinder, or a linear module.

[0075] Reference Figure 1 and Figure 2 Since the detection mechanism 20 of the pole piece 50 in the running direction Y is located upstream of the cutting mechanism 10, the cutting portion 52A of the pole piece 50 that is about to pass through the cutting mechanism 10 along the running direction Y will pass through the detection mechanism 20 first, and the detection mechanism 20 can measure the distance between the detection mechanism 20 and the cutting portion 52A in the first direction X, so that the adjustment mechanism 30 that receives the distance signal can drive the cutting mechanism 10 to move along the first direction X so that, when the cutting portion 52A passes through the cutting mechanism 10, the cutting mechanism 10 is located within the range of the cutting position relative to the cutting portion 52A.

[0076] In the above scheme, the detection mechanism 20 along the tape running direction Y of the pole piece 50 is located upstream of the cutting mechanism 10 to measure the distance between the cutting portion 52A that will pass through the cutting mechanism 10 and the detection mechanism 20 in the first direction X. Then the adjustment mechanism 30 obtains the distance signal measured by the detection mechanism 20, and adjusts the position of the cutting mechanism 10 in the first direction X, so that when the cutting portion 52A passes through the cutting mechanism 10 along the first direction X, the cutting mechanism 10 is located in the cutting position relative to the cutting portion 52A. Thereby, the risk of the pole piece 50 not being cut off due to the cutting mechanism 10 not being in the cutting position is reduced, and the risk of the pole piece 50 being scrapped is reduced, and the production cost of the battery is reduced.

[0077] According to some embodiments of the present application, referring to Figure 1 and Figure 2 The cutting mechanism 10 is a laser cutting mechanism, and the cutting mechanism 10 is used to provide a laser 11 extending along a first direction X to cut the pole piece 50 .

[0078] In the above scheme, a laser cutting mechanism is used as the cutting mechanism 10, so that the pole piece 50 is processed by laser cutting 11, so as to improve the accuracy of die-cutting and slitting of the pole piece 50, improve the quality of the pole piece 50, and further improve the quality of the battery.

[0079] According to some embodiments of the present application, referring to Figure 4 , Figure 4A schematic diagram of the structure of a second die-cutting device 100 provided in some embodiments of the present application. The die-cutting device 100 also includes a base 40 and a sliding member 41. The base 40 is located on one side of the pole piece 50, and the detection mechanism 20 and the adjustment mechanism 30 are both arranged on the base 40. The sliding member 41 is slidably arranged on the base 40 along the first direction X, the cutting mechanism 10 is arranged on the sliding member 41, and the adjustment mechanism 30 is connected to the sliding member 41 and is used to drive the sliding member 41 to move along the first direction X.

[0080] The base 40 may be a mounting cabinet, a mounting rack, a mounting table, or a combination of any two or three thereof.

[0081] “The base 40 is located on one side of the pole piece 50 ” means that the base 40 is located on one side of the pole piece 50 in the width direction Z of the pole piece 50 .

[0082] In some embodiments, the surface of the base 40 facing the pole piece 50 along the width direction Z of the pole piece 50 has a slide groove extending along the first direction X, and the sliding member 41 is partially nested in the slide groove and can move along the first direction X relative to the slide groove.

[0083] In some embodiments, a guide rail is provided on the surface of the base 40 facing the pole piece 50 along the width direction Z of the pole piece 50, and the guide rail extends along the first direction X. A sliding groove adapted to the guide rail is provided on the sliding member 41, and the sliding groove is sleeved outside a portion of the guide rail, and the shell moves along the guide rail relative to the base 40 along the first direction X.

[0084] Optionally, the detection mechanism 20 and the adjustment mechanism 30 may be detachably connected to the base 40 by means of bolt connection or snap connection, or may be non-detachably connected to the base 40 by means of welding.

[0085] When the sliding member 41 drives the cutting mechanism 10 to move along the first direction X, the detection mechanism 20 is stationary relative to the base 40, so that the movement of the cutting mechanism 10 is relatively independent of the detection mechanism 20, thereby reducing the difficulty of the adjustment mechanism 30 processing the distance information measured by the detection mechanism 20 and the pole piece 50 in the first direction X.

[0086] In the above solution, the detection mechanism 20 and the adjustment mechanism 30 are arranged on the base 40, and the cutting mechanism 10 is slidably arranged on the base 40 along the first direction X through the sliding member 41, thereby increasing the integration of the die-cutting device 100, thereby facilitating the installation of the die-cutting device 100. The adjustment mechanism 30 drives the sliding member 41 to move along the first direction X to adjust the distance between the cutting mechanism 10 and the pole piece 50 along the first direction X, which is easy to achieve.

[0087] According to some embodiments of the present application, referring to Figure 4The adjustment mechanism 30 includes a transmission screw 31 and a driving component 32. The transmission screw 31 extends in a first direction X, and the sliding member 41 is threadedly connected to the transmission screw 31. The driving component 32 is used to drive the transmission screw 31 to rotate.

[0088] The driving component 32 is a component in the adjusting mechanism 30 for driving the screw to rotate.

[0089] Exemplarily, the driving component 32 may be a rotary cylinder, a common motor or a servo motor.

[0090] In the embodiment where the driving component 32 is a servo motor, the servo motor can be used to receive the distance between the detection mechanism 20 and the cutting portion (not shown in the figure) of the pole piece 50 in the first direction X measured by the detection mechanism 20 to calculate the distance between the cutting mechanism 10 and the cutting portion (not shown in the figure) in the first direction X at this time, and calculate the number of turns required to rotate in combination with the lead of the transmission screw 31. At the same time, according to the distance between the detection mechanism 20 and the cutting mechanism 10 in the tape running direction Y and the tape running speed of the pole piece 50, the time required for the cutting portion (not shown in the figure) to pass through the cutting mechanism 10 along the tape running direction Y is calculated, so as to adjust the cutting mechanism 10 to be located at the cutting position when the cutting portion (not shown in the figure) passes through the cutting mechanism 10 along the tape running direction Y.

[0091] In the embodiment where the driving component 32 is a rotary cylinder or a common motor, an additional control mechanism is required to complete the above calculations and issue execution commands to the rotary cylinder or the common motor.

[0092] In the above scheme, the rotation of the transmission screw 31 is controlled by the driving component 32, so as to drive the sliding member 41 to move relative to the base 40 along the first direction X, and then when the cutting portion (not shown in the figure) passes through the cutting mechanism 10 along the first direction X, the cutting mechanism 10 is located in the cutting position relative to the cutting portion (not shown in the figure). Thus, the risk of the pole piece 50 not being cut off due to the cutting mechanism 10 not being in the cutting position is reduced, and the risk of the pole piece 50 being scrapped is reduced, thereby reducing the production cost of the battery.

[0093] According to some embodiments of the present application, referring to Figure 5 , Figure 5 The schematic diagram of the structure of the third die-cutting device 100 provided in some embodiments of the present application. The die-cutting device 100 further includes a plurality of rollers 60 , which are spaced apart along the tape-feeding direction Y, and the rollers 60 are used to convey the pole pieces 50 .

[0094] In some embodiments, the roller 60 rotates to drive the pole piece 50 to move; in other embodiments, the pole piece 50 moves along the tape running direction Y and drives the roller 60 to rotate.

[0095] In the above scheme, there are multiple conveying rollers. By providing multiple conveying rollers, the pole piece 50 can be fully supported, thereby reducing the risk of deformation and wrinkling of the pole piece 50 during the conveying process.

[0096] According to some embodiments of the present application, referring to Figure 5 The die-cutting device 100 further includes a negative pressure component 61. The cutting mechanism 10, the pole piece 50 and the negative pressure component 61 are arranged in sequence along the first direction X. The negative pressure component 61 is used to generate negative pressure to adsorb the pole piece 50.

[0097] The negative pressure component 61 is a device that can provide an adsorption force to the pole piece 50 to suppress the shaking of the pole piece 50 .

[0098] Exemplarily, the negative pressure component 61 may be a vacuum adsorption device.

[0099] It can be understood that the negative pressure component 61 is used to adsorb the uncoated area (not shown in the figure) of the pole piece 50 .

[0100] Along the first direction X, the cutting mechanism 10, the pole piece 50 and the negative pressure component 61 are arranged in sequence, so that the negative pressure component 61 can provide an adsorption force to the pole piece 50 when the pole piece 50 passes through the cutting mechanism 10 along the tape direction Y, so as to suppress the shaking of the pole piece 50.

[0101] In the above solution, the cutting mechanism 10, the pole piece 50 and the negative pressure component 61 are sequentially arranged along the first direction X, so that the negative pressure component 61 can adsorb the side of the pole piece 50 away from the cutting mechanism 10 in the first direction X, thereby limiting the shaking of the pole piece 50 in the first direction X when the cutting mechanism 10 cuts the pole piece 50. This reduces the risk of the pole piece 50 not being cut off due to the cutting mechanism 10 not being in the cutting position, thereby reducing the risk of the pole piece 50 being scrapped, and thereby reducing the production cost of the battery.

[0102] According to some embodiments of the present application, referring to Figure 5 Along the first direction X, the negative pressure component 61 has an air inlet surface (not shown in the figure) facing the pole piece 50, and a plurality of air inlet holes (not shown in the figure) are arranged on the air inlet surface (not shown in the figure).

[0103] Exemplarily, the air inlet surface is the side of the negative pressure component 61 facing the pole piece 50 along the first direction X, and a plurality of air inlet holes are formed on the air inlet surface. The air between the pole piece 50 and the air inlet surface is driven along the first direction X by a mechanism (such as a fan) inside the negative pressure component 61 to enter the plurality of air inlet holes to form a negative pressure between the pole piece 50 and the air inlet surface.

[0104] In the above scheme, the negative pressure component 61 drives the air between the pole piece 50 and the air inlet surface along the first direction X into multiple air inlet holes to form a negative pressure between the pole piece 50 and the air inlet surface, thereby limiting the movement of the pole piece 50 along the first direction X.

[0105] According to some embodiments of the present application, referring to Figure 5 The die-cutting device 100 includes a tensioning member 62 , which abuts against a side of the pole piece 50 facing the detection mechanism 20 in the first direction X to tension the pole piece 50 . The detection mechanism 20 is located downstream of the tensioning member 62 along the tape running direction Y of the pole piece 50 .

[0106] For example, the tensioning member 62 may be in the shape of a cuboid or a cylinder.

[0107] In an embodiment in which the tensioning member 62 is a rectangular parallelepiped, the length direction of the tensioning member 62 can be parallel to the width direction Z of the pole piece 50, the width direction of the tensioning member 62 can be parallel to the tape running direction Y of the pole piece 50, and the height direction of the tensioning member 62 can be parallel to the first direction X. Along the first direction X, the side of the tensioning member 62 facing the pole piece 50 abuts against the pole piece 50.

[0108] In the above scheme, along the running direction Y of the pole piece 50, the detection mechanism 20 is located downstream of the tensioning member 62. The tensioning member 62 is in contact with the side of the pole piece 50 facing the detection mechanism 20 in the first direction X, so that the pole piece 50 is tensioned, and the pole piece 50 is detected by the detection mechanism 20 in the tensioned state, which is beneficial to improving the accuracy of the detection mechanism 20 in measuring the distance between the detection mechanism 20 and the pole piece 50 in the first direction X.

[0109] According to some embodiments of the present application, referring to Figure 5 The tensioning member 62 is cylindrical, and the axis of the tensioning member 62, the first direction X and the tape running direction Y are perpendicular to each other.

[0110] In an embodiment where the tensioning member 62 is cylindrical, the axis of the tensioning member 62 may be parallel to the width direction Z of the pole piece 50 .

[0111] In the above scheme, the tensioning member 62 is cylindrical and the axis of the tensioning member 62 , the first direction X and the tape running direction Y are perpendicular to each other, so that the peripheral side of the tensioning member 62 abuts against the pole piece 50 , thereby reducing the risk of the tensioning member 62 scratching the pole piece 50 .

[0112] According to some embodiments of the present application, referring to Figure 5 Along the running direction Y of the pole piece 50 , the detection mechanism 20 is located between the tensioning member 62 and the negative pressure member 61 .

[0113] In the above scheme, the detection mechanism 20 is located between the tension member 62 and the negative pressure member 61 along the tape running direction Y of the pole piece 50. Then, the pole pieces 50 located on both sides of the detection mechanism 20 along the tape running direction Y of the pole piece 50 are restricted along the first direction X by the tension member 62 and the negative pressure member 61, respectively, which is beneficial to improving the accuracy of the detection mechanism 20 in measuring the distance between the detection mechanism 20 and the pole piece 50 in the first direction X.

[0114] An embodiment of the present application provides a pole piece manufacturing device including a die-cutting device 100 provided in any one of the above embodiments.

[0115] In the above technical solution, since the pole piece manufacturing equipment includes the die-cutting device 100 provided by any one of the above embodiments, the pole piece manufacturing equipment also has the beneficial effects provided by any one of the above embodiments.

[0116] According to some embodiments of the present application, referring to Figure 1-Figure 5 The die-cutting device 100 comprises a cutting mechanism 10 , a detection mechanism 20 and an adjustment mechanism 30 . The cutting mechanism 10 is a laser cutting mechanism, and the cutting mechanism 10 is used to provide a laser 11 extending along a first direction X to cut the pole piece 50 .

[0117] The cutting mechanism 10 has a cutting position, and the cutting mechanism 10 is configured to cut the pole piece 50 when the cutting mechanism 10 is located at the cutting position.

[0118] The cutting position is an area in the first direction X where the cutting mechanism 10 can remove or cut the cutting portion 52A of the pole piece 50. When the laser cutting mechanism is located in this area, the distance between the focus of the laser cutting mechanism and the cutting portion 52A of the pole piece 50 in the first direction X is small, so that the laser 11 emitted by the laser cutting mechanism can be better concentrated on the pole piece 50 or near the pole piece 50, so as to facilitate cutting the cutting portion 52A of the pole piece 50.

[0119] The die-cutting device 100 further includes a base 40 and a sliding member 41. The base 40 is located on one side of the pole piece 50, and the detection mechanism 20 and the adjustment mechanism 30 are both disposed on the base 40. The sliding member 41 is slidably disposed on the base 40 along the first direction X, and the cutting mechanism 10 is disposed on the sliding member 41.

[0120] The adjustment mechanism 30 includes a transmission screw 31 and a driving component 32. The first direction X extends, and the sliding member 41 is threadedly connected to the transmission screw 31. The driving component 32 is used to drive the transmission screw 31 to rotate.

[0121] The die-cutting device 100 further includes a plurality of rollers 60 , which are spaced apart along the tape-feeding direction Y. The pole piece 50 moves along the tape-feeding direction Y and drives the rollers 60 to rotate.

[0122] The die-cutting device 100 further includes a negative pressure component 61 and a tensioning member 62 . The cutting mechanism 10 , the pole piece 50 and the negative pressure component 61 are arranged in sequence along the first direction X. The negative pressure component 61 is used to generate negative pressure to absorb the uncoated area 52 of the pole piece 50 .

[0123] The tensioning member 62 abuts against a side of the pole piece 50 facing the detection mechanism 20 in the first direction X to tension the pole piece 50 . Along the tape running direction Y of the pole piece 50 , the detection mechanism 20 is located between the tensioning member 62 and the negative pressure component 61 .

[0124] In the above scheme, the detection mechanism 20 along the tape running direction Y of the pole piece 50 is located upstream of the cutting mechanism 10 to measure the distance between the cutting portion 52A that will pass through the cutting mechanism 10 and the detection mechanism 20 in the first direction X. Then the adjustment mechanism 30 obtains the distance signal measured by the detection mechanism 20, and controls the rotation of the transmission screw 31 through the driving component 32, thereby driving the sliding member 41 to move relative to the base 40 along the first direction X, and then when the cutting portion 52A passes through the cutting mechanism 10 along the first direction X, the cutting mechanism 10 is located in the cutting position relative to the cutting portion 52A. Thereby, the risk of the pole piece 50 not being cut off due to the cutting mechanism 10 not being in the cutting position is reduced, thereby reducing the risk of the pole piece 50 being scrapped, thereby reducing the production cost of the battery.

[0125] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0126] The above embodiments are only used to illustrate the technical solution of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A die-cutting device, characterized in that: include: A cutting mechanism having a cutting position, wherein the cutting mechanism is configured to cut the pole piece when the cutting mechanism is located at the cutting position; A detection mechanism is arranged along the tape running direction of the pole piece, the cutting mechanism is located downstream of the detection mechanism, and the detection mechanism is used to measure the distance between the detection mechanism and the pole piece in a first direction, wherein the first direction is perpendicular to the tape running direction; The adjusting mechanism is connected to the cutting mechanism and electrically connected to the detecting mechanism. The adjusting mechanism is used to obtain the distance signal measured by the detecting mechanism. The adjusting mechanism is used to drive the cutting mechanism to move along the first direction to adjust the cutting mechanism to the cutting position.

2. The die-cutting device according to claim 1, characterized in that: The cutting mechanism is a laser cutting mechanism, and the cutting mechanism is used to provide a laser extending along a first direction to cut the pole piece.

3. The die-cutting device according to claim 1 or 2, characterized in that: The die-cutting device also includes: A base, located on one side of the pole piece, and the detection mechanism and the adjustment mechanism are both arranged on the base; The sliding member is slidably disposed on the base along the first direction, the cutting mechanism is disposed on the sliding member, and the adjusting mechanism is connected to the sliding member and is used to drive the sliding member to move along the first direction.

4. The die-cutting device according to claim 3, characterized in that: The regulating mechanism comprises: A transmission screw rod extends along the first direction, and the sliding member is threadedly connected to the transmission screw rod; The driving component is used to drive the transmission screw to rotate.

5. The die-cutting device according to claim 1, characterized in that: The die-cutting device further comprises a plurality of rollers, which are spaced apart along the belt-feeding direction and are used for conveying the pole pieces.

6. The die-cutting device according to claim 5, characterized in that: The die-cutting device further comprises a negative pressure component, which is used to generate negative pressure to adsorb the electrode piece; Along the first direction, the cutting mechanism, the pole piece and the negative pressure component are arranged in sequence.

7. The die-cutting device according to claim 6, characterized in that: Along the first direction, the negative pressure component has an air inlet surface facing the pole piece, and a plurality of air inlet holes are arranged on the air inlet surface.

8. The die-cutting device according to claim 6, characterized in that: The die-cutting device comprises a tensioning member, the tensioning member abuts against a side of the pole piece facing the detection mechanism in a first direction to tension the pole piece; Along the running direction of the pole piece, the detection mechanism is located downstream of the tensioning member.

9. The die-cutting device according to claim 8, characterized in that: The tensioning member is cylindrical, and the axis of the tensioning member, the first direction and the tape running direction are perpendicular to each other.

10. The die-cutting device according to claim 8, characterized in that: Along the running direction of the pole piece, the detection mechanism is located between the tensioning member and the negative pressure component.

11. A pole piece manufacturing device, characterized in that: It comprises a die-cutting device as claimed in any one of claims 1 to 10.

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