Pole piece conveying device

Abstract

The embodiment of the utility model provides a pole piece conveying device, and belongs to the technical field of battery production. The pole piece conveying device comprises a first conveying mechanism and a second conveying mechanism, wherein the first conveying mechanism is provided with a first bearing surface for conveying pole pieces; the second conveying mechanism is provided with a second bearing surface used for conveying the pole pieces, the first bearing surface and the second bearing surface are arranged in a spaced mode, and the first conveying mechanism is used for conveying the pole pieces to the second conveying mechanism; and a bearing part of the bearing mechanism is connected between the first bearing surface and the second bearing surface in an abutting mode. By arranging the bearing mechanism, when the pole piece is conveyed from the first conveying mechanism to the second conveying mechanism, the bearing part can play a role in bearing and supporting the pole piece, and the bearing part is abutted between the first bearing surface and the second bearing surface, so that when the end part of the pole piece moves from the first conveying mechanism to the bearing part, the probability of collision is low, and the reliability of the pole piece is improved. And the anti-collision effect can be achieved when the pole pieces are conveyed.

Description

Technical Field

[0001] The present application relates to the field of battery production technology, and more specifically, to a pole piece transportation device. Background Art

[0002] During the production and processing of battery cells, the electrodes need to be assembled into battery cells through stacking or winding. Regardless of the assembly method, the electrode sheets need to be cut. The cut electrode sheets are transported to the assembly station via conveyor belts, but conveyor belts are generally not set continuously. When the electrode sheets are transferred between two conveyor belts, there is a risk of collision damage between the ends of the electrode sheets and the surface of the conveyor belts, affecting the performance of the subsequent battery after assembly. Utility Model Content

[0003] The present application provides a pole piece transport device to solve the technical problem that pole pieces are easily damaged by collision with the surface of the conveyor belts when being transported between two conveyor belts, thus affecting the quality of subsequent batteries.

[0004] In a first aspect, an embodiment of the present application provides a pole piece transport device, comprising:

[0005] A first conveying mechanism having a first bearing surface for conveying the electrode piece;

[0006] A second conveying mechanism, having a second bearing surface for conveying the electrode piece, the first bearing surface and the second bearing surface are arranged to be spaced apart, and the first conveying mechanism is used to convey the electrode piece to the second conveying mechanism;

[0007] A supporting mechanism, wherein a supporting portion of the supporting mechanism abuts between the first bearing surface and the second bearing surface.

[0008] In the above technical solution, by setting up a supporting mechanism, when the electrode piece is conveyed from the first conveying mechanism to the second conveying mechanism, the supporting part can receive and support the electrode piece, and the supporting part abuts between the first bearing surface and the second bearing surface, so that when the end of the electrode piece moves from the first conveying mechanism to the supporting part, the probability of collision is small, which can prevent collision when the electrode piece is conveyed.

[0009] In some embodiments, the upper surface of the supporting portion forms a supporting surface, a first end of the supporting surface abuts against the first bearing surface, and a second end of the supporting surface is spaced apart from the second bearing surface.

[0010] In the above technical solution, the transition is smoother, reducing the probability of the end of the pole piece being damaged due to impact.

[0011] In some embodiments, the supporting portion includes a first section to a third section sequentially connected along the conveying direction of the electrode piece, and the supporting surfaces of the first section to the third section are all arranged in an arc surface;

[0012] The center of curvature of the supporting surface of the first section is located at the lower side of the supporting portion, the center of curvature of the supporting surface of the second section is located at the upper side of the supporting portion, and the center of curvature of the supporting surface of the third section is located at the lower side of the supporting portion.

[0013] In the above technical solution, the connection between the supporting surfaces of the first section, the second section and the third section is made smoother and conforms to the natural movement trajectory of the pole piece end, thereby reducing the probability of the pole piece end colliding on the supporting surface.

[0014] In some embodiments, the curvature radius R1 of the supporting surface of the first section, the curvature radius R2 of the supporting surface of the second section, and the curvature radius R3 of the supporting surface of the third section satisfy:

[0015] 14mm≤R1≤21mm, 16mm≤R2≤24mm, 20mm≤R3≤30mm.

[0016] In the above technical solution, by limiting the curvature radius of the supporting surfaces of the first section, the second section and the third section, the moving trajectory of the end of the pole piece on the supporting surface is more in line with the law of motion and is less likely to collide.

[0017] In some embodiments, the first bearing surface and the second bearing surface both have a planar portion and a curved portion, and the supporting portion is supported between the curved portions of the first bearing surface and the second bearing surface.

[0018] In the above technical solution, the movable path of the end of the pole piece is smooth, and the transition between the first bearing surface, the supporting surface and the second bearing surface is smooth, and collision is not likely to occur, thereby improving the transmission efficiency and the quality of the finished product.

[0019] In some embodiments, the pole piece transport device satisfies:

[0020] 5°≤α≤10°, 5°≤β≤10°;

[0021] Among them, α is the central angle corresponding to the arc between the endpoint of the curved portion of the first bearing surface and the first end of the supporting surface on the curvature circle where the curved portion of the first bearing surface is located; β is the central angle corresponding to the arc between the endpoint of the curved portion of the second bearing surface and the second end of the supporting surface on the curvature circle where the curved portion of the second bearing surface is located.

[0022] In the above technical solution, α and β are limited to limit the abutment between the first end of the supporting surface and the first bearing surface, as well as the relative position between the second end of the supporting surface and the second bearing surface, so that the end of the pole piece can smoothly transition between the first bearing surface, the supporting surface and the second bearing surface and is not prone to collision.

[0023] In some embodiments, the first bearing surface and the second bearing surface both have an adsorption area and a non-adsorption area, and the supporting portion is supported between the non-adsorption area of ​​the first bearing surface and the second bearing surface;

[0024] The adsorption areas of the first bearing surface and the second bearing surface are used for adsorbing the pole piece, and the non-adsorption areas of the first bearing surface and the second bearing surface are used for releasing the pole piece.

[0025] In the above technical solution, by supporting the supporting part in the non-adsorption area of ​​the first bearing surface and the second bearing surface, when the end of the pole piece enters the supporting surface from the first bearing surface, the fit between the pole piece and the first bearing surface is reduced, and the probability of collision between the end of the pole piece and the end of the supporting part is reduced. When the end of the pole piece transitions from the supporting surface to the second bearing surface, the end of the pole piece will not be immediately adsorbed on the surface of the second bearing surface when it extends out of the supporting surface, reducing the probability of collision.

[0026] In some embodiments, cross sections at both ends of the supporting portion in the pole piece conveying direction are both vertices of a triangle.

[0027] In some embodiments, the supporting portion includes first to third sections connected sequentially along the conveying direction of the pole piece, the thickness of the first section gradually increases in the direction approaching the second section, and the thickness of the third section gradually increases in the direction approaching the second section.

[0028] In the above technical solution, the supporting part is arranged in a shape with thin ends and thick middle in the conveying direction of the pole piece, so that the supporting part has a certain structural strength and can provide sufficient supporting force for the pole piece.

[0029] In some embodiments, the thickness H1 of the first segment, the thickness H2 of the second segment, and the thickness H3 of the third segment satisfy:

[0030] 0mm

[0031] Wherein, the thickness of the second section is not less than the thickness of the first section and the third section.

[0032] In some embodiments, the supporting mechanism includes a supporting structure, which is disposed between the first conveying mechanism and the second conveying mechanism, and the supporting structure is used to support the supporting part.

[0033] In the above technical solution, the supporting structure is used to support the supporting part and keep the supporting part stable, thereby reducing the impact of the movement of the first bearing surface and the second bearing surface on the supporting part.

[0034] ​In some embodiments, the distance W between the first conveying mechanism and the second conveying mechanism satisfies:

[0035] 7mm≤W≤13mm.

[0036] In the above technical solution, because a supporting part is arranged between the first conveying mechanism and the second conveying mechanism, the distance between the first conveying mechanism and the second conveying mechanism can be set larger than that in the prior art, so as to facilitate the arrangement of other processing or adjustment devices between the first conveying mechanism and the second conveying mechanism, thereby improving space utilization.

[0037] In some embodiments, the first conveying mechanism and the second conveying mechanism both include a conveyor belt and a negative pressure chamber, the conveyor belt is arranged around the negative pressure chamber, the surface of the conveyor belt facing away from the negative pressure chamber forms a bearing surface, and the conveyor belt is provided with a connecting hole connecting the bearing surface and the negative pressure chamber.

[0038] In the above technical solution, the connecting holes and the adsorption area are provided so that the conveyor belt can realize the adsorption and release of the electrode piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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.

[0040] Figure 1 A schematic diagram of the structure of a pole piece transport device provided in some embodiments of the present application;

[0041] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0042] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0043] Figure 4 A schematic diagram of the structure of a supporting portion provided in some embodiments of the present application;

[0044] Figure 5 A schematic diagram of the structure of a first conveying mechanism or a second conveying mechanism provided in some embodiments of the present application;

[0045] Figure 6 A schematic diagram of the structure of a conveyor belt provided in some embodiments of the present application.

[0046] Reference numerals:

[0047] Pole piece transport device 1;

[0048] A first conveying mechanism 11 and a first carrying surface 111;

[0049] A second conveying mechanism 12 and a second carrying surface 121;

[0050] The connecting hole 101, the conveyor belt 102, the plane portion 103, the curved portion 104, and the negative pressure chamber 105;

[0051] Support mechanism 13, support portion 131, support surface 1310, first section 1311, second section 1312, third section 1313, support structure 132;

[0052] Pole piece 2. DETAILED DESCRIPTION

[0053] 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.

[0054] 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.

[0055] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations 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. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0056] 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.

[0057] 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.

[0058] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0059] The pole piece transport device mentioned in the embodiment of the present application can be applied to the production of battery cells in cylindrical, flat, rectangular or other shapes. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, which are not limited in the embodiment of the present application.

[0060] The electrode sheet of the embodiment of the present application may include a positive electrode sheet and a negative electrode sheet. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode collector, the positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer, and the positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode collector, the negative electrode collector not coated with the negative electrode active material layer protrudes from the negative electrode collector coated with the negative electrode active material layer, and the negative electrode collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode collector may be copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current can pass without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0061] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. The battery consists of a box and multiple battery cells contained in the box. Among them, batteries, as core components of new energy vehicles, have high requirements in terms of safety and cycle life.

[0062] In a general battery production process, the electrodes need to be assembled into battery cells by stacking or winding. Regardless of the assembly method, the electrodes need to be cut to facilitate assembly and use. The cut electrodes are transported to the assembly station via a conveyor belt. However, the conveyor belts are generally not continuously arranged, so that the cut electrodes need to be transferred between multiple conveyor belts. When the electrode is transferred between two conveyor belts, there is a risk of collision damage between the end of the electrode and the surface of the conveyor belt, which affects the performance of the subsequent battery after assembly.

[0063] Based on the above considerations, in order to solve the technical problem that the electrode sheet is easily damaged by collision with the surface of the conveyor belt when being transported between two conveyor belts, thereby affecting the subsequent battery quality, the present application designs a electrode sheet transportation device, which includes: a first conveying mechanism, having a first bearing surface for conveying the electrode sheet; a second conveying mechanism, having a second bearing surface for conveying the electrode sheet, the first bearing surface and the second bearing surface are spaced apart, and the first conveying mechanism is used to convey the electrode sheet to the second conveying mechanism; a supporting mechanism, the supporting part of the supporting mechanism abuts between the first bearing surface and the second bearing surface.

[0064] In a pole piece transport device of this structure, by providing a supporting mechanism, when the pole piece is transported from the first conveying mechanism to the second conveying mechanism, the supporting part can receive and support the pole piece, and the supporting part abuts between the first bearing surface and the second bearing surface, so that when the end of the pole piece moves from the first conveying mechanism to the supporting part, the probability of collision is small, thereby preventing collision when the pole piece is transported.

[0065] According to some embodiments of the present application, referring to Figure 1-Figure 6 The present application provides a pole piece transport device 1. The pole piece transport device 1 comprises a first transport mechanism 11, a second transport mechanism 12 and a supporting mechanism 13.

[0066] The first conveying mechanism 11 has a first carrying surface 111 for conveying the electrode sheet 2 ; the second conveying mechanism 12 has a second carrying surface 121 for conveying the electrode sheet 2 , the first carrying surface 111 and the second carrying surface 121 are arranged to be spaced apart, and the first conveying mechanism 11 is used to convey the electrode sheet 2 to the second conveying mechanism 12 .

[0067] It should be noted that when the conveying distance is long, two conveying mechanisms or more than two conveying mechanisms are needed to form the conveying line of the entire production line. The embodiment of the present application takes the conveying line provided with a first conveying mechanism 11 and a second conveying mechanism 12 as an example for explanation.

[0068] In this embodiment, the first carrying surface 111 and the second carrying surface 121 are used to carry the electrode 2 and drive the electrode 2 to move along the conveying direction. The first carrying surface 111 is used to convey the electrode 2 to the second carrying surface 121, wherein the first carrying surface 111 and the second carrying surface 121 are spaced apart from each other, and the first conveying mechanism 11 and the second conveying mechanism 12 are spaced apart from each other to avoid interference with each other. In addition, other devices can be arranged at the interval between the first carrying surface 111 and the second carrying surface 121 to process the electrode 2 during the conveying process. For example, a cutting device can be arranged between the first carrying surface 111 and the second carrying surface 121.

[0069] The supporting portion 131 of the supporting mechanism 13 is abutted between the first supporting surface 111 and the second supporting surface 121 .

[0070] It is understandable that the end of the pole piece 2 will droop downward due to the influence of gravity after losing support. Because the first bearing surface 111 and the second bearing surface 121 are arranged at an interval, if the end of the pole piece 2 continues to move forward after separating from the first bearing surface 111, there is a possibility of collision damage with the second bearing surface 121.

[0071] In this embodiment, the supporting mechanism 13 may include a supporting portion 131, which fills the gap between the first bearing surface 111 and the second bearing surface 121 by abutting the supporting portion 131 between the first bearing surface 111 and the second bearing surface 121, so that the end of the pole piece 2 can be directly transported from the first bearing surface 111 to the supporting portion 131 when crossing the gap between the first bearing surface 111 and the second bearing surface 121, and the end of the pole piece 2 is supported by the supporting portion 131 to prevent it from excessively drooping downward, and the continuous driving force of the first bearing surface 111 causes the end of the pole piece 2 to directly transition from the supporting portion 131 to the second bearing surface 121, thereby reducing the probability of a head-on collision between the end of the pole piece 2 and the second bearing surface 121.

[0072] According to the electrode transport device 1 provided in the embodiment of the present application, by setting a supporting mechanism 13, when the electrode 2 is conveyed from the first conveying mechanism 11 to the second conveying mechanism 12, the supporting portion 131 can receive and support the electrode 2, and the supporting portion 131 abuts between the first bearing surface 111 and the second bearing surface 121, so that when the end of the electrode 2 moves from the first conveying mechanism 11 to the supporting portion 131, the probability of collision is small, which can prevent collision when the electrode 2 is conveyed.

[0073] According to some embodiments of the present application, referring to Figure 2-Figure 4 The upper surface of the supporting portion 131 may form a supporting surface 1310 , a first end of the supporting surface 1310 may abut against the first bearing surface 111 , and a second end of the supporting surface 1310 may be spaced apart from the second bearing surface 121 .

[0074] In this embodiment, the upper surface of the supporting portion 131 may form a supporting surface 1310 for supporting the pole piece 2. The end of the pole piece 2 enters the supporting surface 1310 from the first end of the supporting surface 1310, and the first end of the supporting surface 1310 is brought into contact with the first bearing surface 111, so that the end of the pole piece 2 can directly transition from the first bearing surface 111 to the supporting surface 1310, and will not sag due to separation from the first bearing surface 111.

[0075] The end of the pole piece 2 transitions from the second end of the supporting surface 1310 to the second bearing surface 121. The second end of the supporting surface 1310 is spaced apart from the second bearing surface 121 to make the transition of the end of the pole piece 2 to the second bearing surface 121 smoother. Specifically, the second end of the supporting surface 1310 can be set slightly higher than the second bearing surface 121, so that the end of the pole piece 2 is spaced a certain distance from the second bearing surface 121 when it is output from the second end of the supporting surface 1310, and then falls to the second bearing surface 121 due to the action of gravity. The transition is smoother, reducing the probability of the end of the pole piece 2 being damaged due to impact.

[0076] According to some embodiments of the present application, referring to Figure 2-Figure 4 ,in particular Figure 4 The supporting portion 131 may include a first section 1311 to a third section 1313 sequentially connected along the conveying direction of the electrode 2, and the supporting surfaces 1310 of the first section 1311 to the third section 1313 are all arranged in an arc surface, wherein the center of curvature of the supporting surface 1310 of the first section 1311 can be located at the lower side of the supporting portion 131, the center of curvature of the supporting surface 1310 of the second section 1312 can be located at the upper side of the supporting portion 131, and the center of curvature of the supporting surface 1310 of the third section 1313 can be located at the lower side of the supporting portion 131.

[0077] In this embodiment, by dividing the supporting portion 131 into three sections, and making the supporting surfaces 1310 of the first section 1311 to the third section 1313 all set to arc surfaces, and making the end of the pole piece 2 have no hard turns during the transportation process on the supporting surface 1310, the movement path is smoother.

[0078] By further limiting the curvature center of the supporting surface 1310 of the first section 1311 and the third section 1313 to face downward, the supporting surface 1310 of the first section 1311 can be better connected with the first bearing surface 111, and the supporting surface 1310 of the third section 1313 can be better connected with the second bearing surface 121, thereby reducing the probability of collision when the end of the pole piece 2 enters and leaves the supporting portion 131. By limiting the curvature center of the supporting surface 1310 of the second section 1312 to face upward, the connection of the supporting surfaces 1310 of the first section 1311, the second section 1312 and the third section 1313 is smoother and conforms to the natural movement trajectory of the end of the pole piece 2, thereby reducing the probability of collision of the end of the pole piece 2 on the supporting surface 1310.

[0079] According to some embodiments of the present application, referring to Figure 4 , the curvature radius R1 of the supporting surface 1310 of the first section 1311, the curvature radius R2 of the supporting surface 1310 of the second section 1312, and the curvature radius R3 of the supporting surface 1310 of the third section 1313 can satisfy:

[0080] 14mm≤R1≤21mm, 16mm≤R2≤24mm, 20mm≤R3≤30mm.

[0081] In this embodiment, by limiting the curvature radius of the supporting surface 1310 of the first section 1311, the second section 1312 and the third section 1313, the moving trajectory of the end of the pole piece 2 on the supporting surface 1310 is more in line with the law of motion and is less likely to collide.

[0082] Among them, the value range of the curvature radius R1 of the supporting surface 1310 of the first section 1311 is [14mm, 21mm]. Specifically, R1 can be 14mm, 15mm, 16mm, 17.5mm, 19mm, 20mm, 21mm or other values ​​between 14mm and 21mm.

[0083] Among them, the value range of the curvature radius R2 of the supporting surface 1310 of the second section 1312 is [16mm, 24mm]. Specifically, R2 can be 16mm, 17mm, 18mm, 19mm, 20mm, 22mm, 24mm or other values ​​between 16mm-24mm.

[0084] Among them, the value range of the curvature radius R3 of the supporting surface 1310 of the third section 1313 is [20mm, 30mm]. Specifically, R3 can be 20mm, 21mm, 22mm, 23mm, 25mm, 27mm, 30mm or other values ​​between 20mm-30mm.

[0085] According to some embodiments of the present application, referring to Figure 1-Figure 3The first bearing surface 111 and the second bearing surface 121 may both have a planar portion 103 and a curved portion 104 , and the supporting portion 131 may be supported between the curved portions 104 of the first bearing surface 111 and the second bearing surface 121 .

[0086] A general conveying mechanism drives the conveyor belt 102 to move through a driving roller and then drives the pole piece 2 to move. Therefore, the conveying mechanism can define a flat portion 103 for carrying the pole piece 2 and a curved portion 104 located at a turning point.

[0087] In this embodiment, the first bearing surface 111 and the second bearing surface 121 both have a planar portion 103 and a curved portion 104. The planar portion 103 is used to bear the pole piece 2. A curved portion 104 of the first bearing surface 111 and a curved portion 104 of the second bearing surface 121 are arranged opposite to each other. When the end of the pole piece 2 moves along the planar portion 103 of the first bearing surface 111 to the curved portion 104, it will naturally droop along the curved surface of the curved portion 104.

[0088] If the supporting portion 131 is supported on the plane portion 103 of the first bearing surface 111, the end of the pole piece 2 moves linearly along the plane portion 103, and it is inevitable that a certain collision will occur due to the thickness of the supporting portion 131. By supporting the supporting portion 131 on the curved portion 104 of the first bearing surface 111, on the one hand, it is convenient for the supporting portion 131 to be connected with the first bearing surface 111, and on the other hand, when the end of the pole piece 2 leaves the plane portion 103 of the first bearing surface 111, there may be a certain distance of suspension. By supporting the supporting portion 131 at a position where the end of the pole piece 2 is spaced from the first bearing surface 111, the probability of collision between the pole piece 2 and the supporting portion 131 can be reduced, and the movement of the end of the pole piece 2 entering the supporting portion 131 can be made more natural.

[0089] The other end of the supporting portion 131 is supported on the curved portion 104 of the second bearing surface 121. Similarly, when the end of the pole piece 2 extends out from the other end of the supporting portion 131, it will not directly hit the planar portion 103 of the second bearing surface 121. In combination with the aforementioned embodiment, the second end of the supporting surface 1310 is spaced a certain distance from the curved portion 104 of the second bearing surface 121, so that the end of the pole piece 2 extends out of the other end of the supporting portion 131 in an inclined upward direction, and falls downward due to the action of gravity to land on the second bearing surface 121 in a state relatively parallel to the planar portion 103 of the second bearing surface 121.

[0090] According to the embodiment of the present application, the movable path of the end of the pole piece 2 is smooth, and the transition between the first bearing surface 111, the supporting surface 1310 and the second bearing surface 121 is smooth, and collision is not likely to occur, thereby improving the transmission efficiency and the quality of the finished product.

[0091] According to some embodiments of the present application, referring to Figure 2 and Figure 3 , the pole piece transport device 1 can meet the following requirements:

[0092] 5°≤α≤10°, 5°≤β≤10°; wherein, α is the center angle corresponding to the arc between the endpoint of the curved portion 104 of the first bearing surface 111 and the first end of the supporting surface 1310 on the curvature circle where the curved portion 104 of the first bearing surface 111 is located; β is the center angle corresponding to the arc between the endpoint of the curved portion 104 of the second bearing surface 121 and the second end of the supporting surface 1310 on the curvature circle where the curved portion 104 of the second bearing surface 121 is located.

[0093] In this embodiment, α and β are limited to limit the abutment between the first end of the supporting surface 1310 and the first bearing surface 111, and the relative position between the second end of the supporting surface 1310 and the second bearing surface 121, so that the end of the pole piece 2 can smoothly transition between the first bearing surface 111, the supporting surface 1310 and the second bearing surface 121 and is not prone to collision.

[0094] The value range of α is [5°, 10°]. Specifically, α can be 5°, 6°, 7°, 8°, 9°, 10° or other values ​​between 5° and 10°, which are not limited here.

[0095] The value range of β is [5°, 10°]. Specifically, β can be 5°, 6°, 7°, 8°, 9°, 10° or other values ​​between 5° and 10°, which are not limited here.

[0096] According to some embodiments of the present application, the first bearing surface 111 and the second bearing surface 121 may both have an adsorption area and a non-adsorption area, and the supporting portion 131 may be supported between the non-adsorption areas of the first bearing surface 111 and the second bearing surface 121; wherein the adsorption areas of the first bearing surface 111 and the second bearing surface 121 are used to adsorb the electrode 2, and the non-adsorption areas of the first bearing surface 111 and the second bearing surface 121 are used to release the electrode 2.

[0097] Since the pole piece 2 is relatively light and there may be a cutting process during the transportation of the pole piece 2 , in order to prevent the pole piece 2 from flying out of the transportation mechanism during rapid transportation, the transportation mechanism generally has an adsorption area and a non-adsorption area.

[0098] In this embodiment, the adsorption area of ​​the first bearing surface 111 and the second bearing surface 121 is used to adsorb the electrode piece 2, so that the electrode piece 2 is closely attached to the adsorption area of ​​the first bearing surface 111 and the second bearing surface 121, and the probability of the electrode piece 2 flying out is reduced. The non-adsorption area of ​​the first bearing surface 111 and the second bearing surface 121 does not have an adsorption force, so that the electrode piece 2 is in a separable state in the non-adsorption area of ​​the first bearing surface 111 and the second bearing surface 121. It can be understood that in order to facilitate the transfer between the first bearing surface 111 and the second bearing surface 121 of the electrode piece 2, a non-adsorption area of ​​the first bearing surface 111 and a non-adsorption area of ​​the second bearing surface 121 are arranged relatively.

[0099] By supporting the supporting portion 131 in the non-adsorption area of ​​the first bearing surface 111 and the second bearing surface 121, when the end of the pole piece 2 enters the supporting surface 1310 from the first bearing surface 111, the fit between the pole piece 2 and the first bearing surface 111 is reduced, and the probability of collision between the end of the pole piece 2 and the end of the supporting portion 131 is reduced. When the end of the pole piece 2 transitions from the supporting surface 1310 to the second bearing surface 121, the end of the pole piece 2 will not be immediately adsorbed on the surface of the second bearing surface 121 when it extends out of the supporting surface 1310, thereby reducing the probability of collision.

[0100] According to some embodiments of the present application, referring to Figure 2-Figure 4 The cross sections of both ends of the supporting portion 131 in the conveying direction of the pole piece 2 may have vertex angles of a triangle.

[0101] In this embodiment, the cross-sections of the supporting portion 131 at both ends in the conveying direction of the pole piece 2 can be set in the shape of triangular vertices, and can be set in the shape of acute angles, so that when the supporting portion 131 is supported on the first bearing surface 111 and the second bearing surface 121, the angle between the first end of the supporting surface 1310 and the first bearing surface 111 is smaller, and the angle between the second end of the supporting surface 1310 and the second bearing surface 121 is smaller, thereby reducing the probability of collision.

[0102] According to some embodiments of the present application, referring to Figure 2-Figure 4 ,in particular Figure 4 The supporting portion 131 includes a first section 1311 to a third section 1313 sequentially connected along the conveying direction of the electrode 2. The thickness of the first section 1311 can be gradually increased in the direction close to the second section 1312, and the thickness of the third section 1313 can be gradually increased in the direction close to the second section 1312.

[0103] In this embodiment, the supporting portion 131 may include a first section 1311, a second section 1312 and a third section 1313 connected in sequence along the conveying direction of the electrode 2, wherein the thickness of the first section 1311 at one end away from the second section 1312 is thinner, so as to facilitate the connection between the supporting portion 131 and the first bearing surface 111, thereby reducing the probability of collision when the electrode 2 transitions from the first bearing surface 111 to the supporting surface 1310, and the thickness of the third section 1313 at one end away from the second section 1312 is thinner, so as to facilitate the connection between the supporting portion 131 and the second bearing surface 121, thereby reducing the probability of collision when the electrode 2 transitions from the supporting surface 1310 to the second bearing surface 121.

[0104] Furthermore, the supporting portion 131 is configured to be thin at both ends and thick in the middle in the conveying direction of the pole piece 2 , so that the supporting portion 131 has a certain structural strength and can provide sufficient supporting force for the pole piece 2 .

[0105] According to some embodiments of the present application, referring to Figure 4 , the thickness H1 of the first section 1311, the thickness H2 of the second section 1312, and the thickness H3 of the third section 1313 can satisfy:

[0106] 0mm

[0107] In this embodiment, the thickness of the first section 1311 begins to transition from 0, and the thickness of the first section 1311 reaches a maximum at the end where the first section 1311 is connected to the second section 1312; the thickness of the second section 1312 can be evenly set so that the middle section of the supporting portion 131 has sufficient supporting force; the thickness of the third section 1313 also begins to transition from 0, and the thickness of the third section 1313 reaches a maximum at the end where the third section 1313 is connected to the second section 1312.

[0108] It is understandable that the thickness of the second section 1312 is not less than the thickness of the first section 1311 and the third section 1313, so as to facilitate the connection between the second section 1312 and the first section 1311 and the third section 1313, and ensure that the middle section of the supporting portion 131 has sufficient supporting force.

[0109] Among them, the value range of the thickness H1 of the first section 1311 can be (0mm, 3mm]. Specifically, the thickness H2 of the second section 1312 can be 0.1mm, 1mm, 1.5mm, 2.25mm, 2.5mm, 3mm or other values ​​greater than 0 and less than or equal to 3mm, which are not specifically limited here.

[0110] ​Among them, the value range of the thickness H2 of the second section 1312 can be [1.5mm, 3mm]. Specifically, the thickness H2 of the second section 1312 can be 1.5mm, 1.75mm, 2mm, 2.25mm, 2.5mm, 3mm or other values ​​between 1.5mm-3mm, which are not limited here.

[0111] Among them, the value range of the thickness H3 of the third section 1313 can be (0mm, 3mm]. Specifically, the thickness H3 of the third section 1313 can be 0.1mm, 1mm, 1.5mm, 2.25mm, 2.5mm, 3mm or other values ​​greater than 0 and less than or equal to 3mm, which are not specifically limited here.

[0112] According to some embodiments of the present application, referring to Figure 1 The supporting mechanism 13 may include a supporting structure 132 . The supporting structure 132 may be disposed between the first conveying mechanism 11 and the second conveying mechanism 12 . The supporting structure 132 is used to support the supporting portion 131 .

[0113] In this embodiment, a support structure 132 may be provided between the first conveying mechanism 11 and the second conveying mechanism 12. The support structure 132 may be fixedly connected to the supporting portion 131 to support the supporting portion 131 and keep the supporting portion 131 stable, thereby reducing the impact of the movement of the first bearing surface 111 and the second bearing surface 121 on the supporting portion 131.

[0114] Exemplarily, the support structure 132 may include two support columns arranged along the width direction of the pole piece 2 , and the two support columns are fixedly connected to the supporting portion 131 on both sides of the width direction of the pole piece 2 by bolts to fix the supporting portion 131 .

[0115] According to some embodiments of the present application, referring to Figure 1 The distance W between the first conveying mechanism 11 and the second conveying mechanism 12 can satisfy: 8mm≤W≤12mm.

[0116] In this embodiment, because a supporting portion 131 is provided between the first conveying mechanism 11 and the second conveying mechanism 12, the distance between the first conveying mechanism 11 and the second conveying mechanism 12 can be set larger than that in the prior art, so as to facilitate the arrangement of other processing or adjustment devices between the first conveying mechanism 11 and the second conveying mechanism 12, thereby improving space utilization.

[0117] Among them, the value range of W is [8mm, 12mm]. Specifically, W can be 8mm, 9mm, 10mm, 11mm, 12mm or other values ​​between 8mm and 12mm, which are not limited here.

[0118] According to some embodiments of the present application, referring to Figure 1 , Figure 5 and Figure 6 The first conveying mechanism 11 and the second conveying mechanism 12 may both include a conveyor belt 102 and a negative pressure chamber 105. The conveyor belt 102 may be arranged around the negative pressure chamber 105. The surface of the conveyor belt 102 facing away from the negative pressure chamber 105 forms a bearing surface. The conveyor belt 102 may be provided with a connecting hole 101 connecting the bearing surface and the negative pressure chamber 105.

[0119] The first conveying mechanism 11 and the second conveying mechanism 12 may both be provided with a conveyor belt and a negative pressure chamber 105 for conveying the electrode sheet 2. The conveyor belt may be arranged around the negative pressure chamber 105 and may be arranged to rotate around the negative pressure chamber 105 so that the conveyor belt can convey the electrode sheet 2. The surface of the conveyor belt of the first conveying mechanism 11 that is away from the negative pressure chamber 105 forms a first bearing surface 111, and the surface of the conveyor belt of the second conveying mechanism 12 that is away from the negative pressure chamber 105 forms a second bearing surface 121.

[0120] In this embodiment, when the connecting hole 101 of the conveyor belt moves to the upper side of the negative pressure chamber 105, the connecting hole 101 can be connected with the negative pressure chamber 105 to generate a certain suction force on the electrode piece 2 placed on the upper surface of the conveyor belt. When the connecting hole 101 of the conveyor belt 102 moves to the bending portion 104 or the non-adsorption area as in the above-mentioned embodiment, the connecting hole 101 is disconnected from the negative pressure chamber 105 and loses the adsorption force on the electrode piece 2.

[0121] By providing the connecting hole 101 and the adsorption area, the conveyor belt 102 can realize the automatic conversion of adsorption and release of the electrode sheet 2, and the structure is simple and stable.

[0122] According to some embodiments of the present application, see Figure 1-Figure 6 As shown, the present application provides a pole piece transport device 1 , which includes a first transport mechanism 11 , a second transport mechanism 12 and a supporting mechanism 13 .

[0123] The first conveying mechanism 11 and the second conveying mechanism 12 both include a conveyor belt 102 and a negative pressure chamber 105. The conveyor belt 102 surrounds the negative pressure chamber 105 and can be rotatably arranged around the negative pressure chamber 105. The surface of the conveyor belt 102 facing away from the negative pressure chamber 105 is a bearing surface. The conveyor belt 102 is provided with a plurality of connecting holes 101 for connecting the bearing surface and the negative pressure chamber 105. When the connecting holes 101 move to the upper side of the negative pressure chamber 105, the connecting holes 101 are connected to the negative pressure chamber 105.

[0124] The bearing surface of the conveyor belt 102 of the first conveying mechanism 11 is the first bearing surface 111, and the bearing surface of the conveyor belt 102 of the second conveying mechanism 12 is the second bearing surface 121. The first bearing surface 111 and the second bearing surface 121 both have a connected plane portion 103 and a curved portion 104. The connecting hole 101 located at the plane portion 103 can be connected to the negative pressure chamber 105 to form an adsorption area, and the connecting hole 101 located at the curved portion 104 is disconnected from the negative pressure chamber 105 to form a non-adsorption area. The curved portion 104 of the first bearing surface 111 is arranged opposite to the curved portion 104 of the second bearing surface 121.

[0125] The distance W between the first conveying mechanism 11 and the second conveying mechanism 12 satisfies: 7 mm ≤ W ≤ 13 mm.

[0126] The supporting mechanism 13 includes a supporting portion 131 and a supporting structure 132 . The supporting structure 132 is disposed between the first conveying mechanism 11 and the second conveying mechanism 12 and is fixedly connected to the supporting portion 131 to support the supporting portion 131 .

[0127] The two ends of the supporting portion 131 along the conveying direction of the electrode sheet 2 are supported between the curved portions 104 of the first conveying mechanism 11 and the second conveying mechanism 12. The upper surface of the supporting portion 131 forms a supporting surface 1310, the first end of the supporting surface 1310 abuts against the first bearing surface 111, and the second end of the supporting surface 1310 is spaced apart from the second bearing surface 121, and can satisfy: 5°≤α≤10°, 5°≤β≤10°; wherein α is the center angle of the arc between the end point of the curved portion 104 of the first bearing surface 111 and the first end of the supporting surface 1310 on the curvature circle where the curved portion 104 of the first bearing surface 111 is located; β is the center angle of the arc between the end point of the curved portion 104 of the second bearing surface 121 and the second end of the supporting surface 1310 on the curvature circle where the curved portion 104 of the second bearing surface 121 is located.

[0128] The supporting portion 131 includes a first section 1311 , a second section 1312 and a third section 1313 which are sequentially connected along the conveying direction of the electrode piece 2 .

[0129] The supporting surfaces 1310 of the first section 1311, the second section 1312 and the third section 1313 are all arranged in an arc shape, and the center of curvature of the supporting surface 1310 of the first section 1311 is located at the lower side of the supporting portion 131, the center of curvature of the supporting surface 1310 of the second section 1312 is located at the upper side of the supporting portion 131, and the center of curvature of the supporting surface 1310 of the third section 1313 is located at the lower side of the supporting portion 131. Among them, the radius of curvature R1 of the supporting surface 1310 of the first section 1311, the radius of curvature R2 of the supporting surface 1310 of the second section 1312, and the radius of curvature R3 of the supporting surface 1310 of the third section 1313 satisfy: 14mm≤R1≤21mm, 16mm≤R2≤24mm, and 20mm≤R3≤30mm.

[0130] The thickness of the first section 1311 is gradually increased in the direction close to the second section 1312, and the thickness of the third section 1313 is gradually increased in the direction close to the second section 1312. The thickness H1 of the first section 1311, the thickness H2 of the second section 1312, and the thickness H3 of the third section 1313 satisfy: 0 mm

[0131] 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.

[0132] The above are only preferred embodiments of the present application and are not intended 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 pole piece transport device, characterized in that: include: A first conveying mechanism having a first bearing surface for conveying the electrode piece; A second conveying mechanism, having a second bearing surface for conveying the electrode piece, the first bearing surface and the second bearing surface are arranged to be spaced apart, and the first conveying mechanism is used to convey the electrode piece to the second conveying mechanism; A supporting mechanism, wherein a supporting portion of the supporting mechanism abuts between the first bearing surface and the second bearing surface.

2. The pole piece transport device according to claim 1, characterized in that: The upper surface of the supporting portion forms a supporting surface, a first end of the supporting surface abuts against the first bearing surface, and a second end of the supporting surface is spaced apart from the second bearing surface.

3. The pole piece transport device according to claim 2, characterized in that: The supporting portion includes a first section to a third section which are sequentially connected along the conveying direction of the electrode piece, and the supporting surfaces of the first section to the third section are all arranged in an arc surface; The center of curvature of the supporting surface of the first section is located at the lower side of the supporting portion, the center of curvature of the supporting surface of the second section is located at the upper side of the supporting portion, and the center of curvature of the supporting surface of the third section is located at the lower side of the supporting portion.

4. The pole piece transport device according to claim 3, characterized in that: The curvature radius R1 of the supporting surface of the first section, the curvature radius R2 of the supporting surface of the second section, and the curvature radius R3 of the supporting surface of the third section satisfy: 14mm≤R1≤21mm, 16mm≤R2≤24mm, 20mm≤R3≤30mm.

5. The pole piece transport device according to claim 2, characterized in that: The first bearing surface and the second bearing surface both have a planar portion and a curved portion, and the supporting portion is supported between the curved portions of the first bearing surface and the second bearing surface.

6. The pole piece transport device according to claim 5, characterized in that: satisfy: 5°≤α≤10°，5°≤β≤10°； Among them, α is the central angle corresponding to the arc between the endpoint of the curved portion of the first bearing surface and the first end of the supporting surface on the curvature circle where the curved portion of the first bearing surface is located; β is the central angle corresponding to the arc between the endpoint of the curved portion of the second bearing surface and the second end of the supporting surface on the curvature circle where the curved portion of the second bearing surface is located.

7. The pole piece transport device according to any one of claims 1 to 6, characterized in that: The first bearing surface and the second bearing surface both have an adsorption area and a non-adsorption area, and the supporting portion is supported between the non-adsorption area of ​​the first bearing surface and the second bearing surface; The adsorption areas of the first bearing surface and the second bearing surface are used for adsorbing the pole piece, and the non-adsorption areas of the first bearing surface and the second bearing surface are used for releasing the pole piece.

8. The pole piece transport device according to any one of claims 1 to 6, characterized in that: The cross sections of both ends of the supporting portion in the pole piece conveying direction are both triangle vertices.

9. The pole piece transport device according to any one of claims 1 to 6, characterized in that: The supporting portion includes first to third sections connected in sequence along the conveying direction of the electrode piece, the thickness of the first section gradually increases in the direction approaching the second section, and the thickness of the third section gradually increases in the direction approaching the second section.

10. The pole piece transport device according to claim 9, characterized in that: The thickness H1 of the first segment, the thickness H2 of the second segment, and the thickness H3 of the third segment satisfy: 0mm <H1≤3mm,1.5mm<H2≤3mm,0mm<H3≤3mm; Wherein, the thickness of the second section is not less than the thickness of the first section and the third section.

11. The pole piece transport device according to any one of claims 1 to 6, characterized in that: The supporting mechanism comprises a supporting structure, wherein the supporting structure is arranged between the first conveying mechanism and the second conveying mechanism, and the supporting structure is used to support the supporting part.

12. The pole piece transport device according to claim 11, characterized in that: The distance W between the first conveying mechanism and the second conveying mechanism satisfies: 7mm≤W≤13mm.

13. The pole piece transport device according to any one of claims 1 to 6, characterized in that: The first conveying mechanism and the second conveying mechanism both include a conveyor belt and a negative pressure chamber. The conveyor belt is arranged around the negative pressure chamber. The surface of the conveyor belt facing away from the negative pressure chamber forms a bearing surface. The conveyor belt is provided with a connecting hole connecting the bearing surface and the negative pressure chamber.

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