Pole piece cutting device

Abstract

The utility model discloses a pole piece cutting device. The pole piece cutting device comprises at least one of a first detection piece and a second detection piece, a conveying mechanism and a third detection piece. The pole piece to be cut comprises a coating area and a blank area which are arranged in the second direction, the coating area comprises a first edge extending in the first direction, the blank area comprises a third edge and a fourth edge which extend in the first direction, and the third edge coincides with the first edge. The first detection piece is used for detecting whether the fourth edge is at a first preset position; the second detection member is used for detecting whether the third edge is at a second preset position. The third detection piece is used for detecting whether the pole piece to be cut reaches the cutting position or not. Based on the first detection piece or the second detection piece, the cutting machine head is controlled to move in the left-right direction. In this way, the foil tab of the pole piece obtained through cutting of the cutting machine head is provided with the coating area of 0.5 mm-1 mm, and the size of the coating area reserved on the foil tab can be accurately controlled.

Description

Technical Field

[0001] The utility model generally relates to the technical field of lithium battery production, and particularly relates to a pole piece cutting device. Background Art

[0002] In the related art, during the R & D experiment process of lithium ion batteries, the die-cutting equipment used to cut the pole pieces to be cut into die-cut pole pieces is usually manually operated and simple.

[0003] Since a coating area of 0.5 mm to 1 mm needs to be reserved on the foil tab of the die-cut pole piece. During the experiment, by manually placing the pole pieces to be cut, the size of the coating area reserved on the foil tab of the die-cut pole piece is controlled, and the probability of defective products is relatively high. Summary of the Utility Model

[0004] This application expects to provide a pole piece cutting device for experiments, at least for reducing the probability of defective products.

[0005] The utility model provides a pole piece cutting device for experiments, including at least one of a first detection piece and a second detection piece, a conveying mechanism and a third detection piece.

[0006] The conveying mechanism transports the pole piece to be cut along a first direction, the first direction is the length direction of the pole piece to be cut, the pole piece to be cut includes a coating area and a blank area arranged along a second direction, the second direction is the width direction of the pole piece to be cut, the coating area includes a first edge extending along the first direction, the blank area includes a third edge and a fourth edge extending along the first direction, and the third edge coincides with the first edge;

[0007] A first detection piece, which is used to detect whether the fourth edge is at a first preset position;

[0008] A second detection piece, which is used to detect whether the third edge is at a second preset position;

[0009] A third detection piece, which is used to detect whether the pole piece to be cut reaches the transmission and cutting position.

[0010] As an implementable mode, it includes the first detection piece, the second detection piece and the third detection piece.

[0011] As an implementable mode, the distance between the first detection piece and the second detection piece can be adjusted.

[0012] As an implementable mode, the first detection member and the second detection member are located on the same side of the conveying mechanism in the first direction, or the first detection member and the second detection member are respectively located on both sides of the conveying mechanism in the first direction.

[0013] As an implementable mode, it further includes a first support frame located on one side of the conveying mechanism in the first direction. The first support frame includes a first slider, a second slider, and a guide rail extending along the second direction. The first slider and the second slider are slidably engaged with the guide rail.

[0014] The first detection member is connected to the first slider, and the second detection member is connected to the second slider.

[0015] As an implementable mode, the first detection member, the second detection member, and the third detection member are all the same.

[0016] The first detection member includes an infrared sensor, a photoelectric sensor, an ultrasonic sensor, a radar sensor, a millimeter-wave radar sensor.

[0017] As an implementable mode, the first detection member is an infrared sensor.

[0018] As an implementable mode, it further includes a deviation correction mechanism.

[0019] The deviation correction mechanism is provided on one side or both sides of the conveying mechanism in the second direction. The deviation correction mechanism is used to correct the position of the to-be-cut pole piece in the second direction so that the fourth edge is at the first preset position, and / or the third edge is at the second preset position.

[0020] As an implementable mode, the deviation correction mechanism includes a plurality of guide wheels that rollingly contact the long side of the to-be-cut pole piece.

[0021] As an implementable mode, it further includes a cutting head. The cutting head is used to receive the detection result of the third detection member and cut the to-be-cut pole piece transmitted to the cutting position.

[0022] The conveying mechanism includes a first conveying component and a second conveying component arranged in sequence along the first direction. The cutting head is located above the second conveying component.

[0023] In the above solution, the present application provides a third detection member and at least one of the first detection member and the second detection member, and controls the movement of the cutting head in the left-right direction based on the first detection member or the second detection member. In this way, the coating area of the foil tab of the pole piece obtained by cutting with the cutting head can be 0.5 mm - 1 mm, and the size of the reserved coating area on the foil tab can be accurately controlled, greatly suppressing the probability of waste products, which in turn contributes to the development of new battery products and cost savings. Based on the third detection member, the carrying and conveying surface of the second conveying assembly is controlled to be stationary. At the same time, the cutting head is controlled to approach the pole piece to be cut and cut it to obtain the pole piece. Description of the Drawings

[0024] Other features, objects, and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1 A three-dimensional view of the pole piece cutting device for experiments provided by an embodiment of the present utility model;

[0026] Figure 2 An exploded schematic view of the pole piece cutting device for experiments provided by an embodiment of the present utility model;

[0027] Figure 3 A partial schematic view of the pole piece cutting device for experiments provided by an embodiment of the present utility model;

[0028] Figure 4 For Figure 3 The top view;

[0029] Figure 5 For Figure 4 The enlarged schematic view of the partial A;

[0030] Figure 6 For Figure 4 The enlarged schematic view of the partial B;

[0031] Figure 7 A schematic view of the pole piece to be cut provided by an embodiment of the present utility model;

[0032] Conveying mechanism 10, first conveying assembly 11, second conveying assembly 12, right edge 121, left edge 122, front edge 123;

[0033] First detection member 21, second detection member 22, third detection member 23;

[0034] First support frame 30, first slider 31, second slider 32, guide rail 33, second support frame 40;

[0035] Pole piece to be cut 50, front short side 501, rear short side 502, left long side 503, right long side 504;

[0036] Coating area 51, first edge 511, second edge 512, blank area 52, first blank area 52a, second blank area 52b, third edge 521, fourth edge 522;

[0037] Pole piece 50a, foil pole ear 50a1;

[0038] Deviation correction mechanism 60, guide wheel 61, cutting head 70. Specific implementation mode

[0039] The present application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than limiting the utility model. In addition, it should be noted that for the sake of description, only parts related to the utility model are shown in the drawings.

[0040] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0041] At least refer to Figures 1-7 As shown, an example of the present utility model provides a pole piece cutting device for experiments, including: a conveying mechanism 10, a third detection member 23, at least one of a first detection member 21 and a second detection member 22.

[0042] The conveying mechanism 10 conveys the pole piece 50 to be cut along a first direction, and the first direction is the length direction of the pole piece 50 to be cut (such as Figure 7 The front-back direction shown). Refer to Figure 7 , the pole piece 50 to be cut includes a coating area 51 and a blank area 52 arranged along a second direction (such as Figure 7 The left-right direction shown), the second direction is the width direction of the pole piece 50 to be cut, the coating area 51 includes a first edge 511 extending along the first direction, and the blank area 52 includes a third edge 521 and a fourth edge 522 extending along the first direction. The third edge 521 coincides with the first edge 511. Among them, the first direction and the second direction are perpendicular to each other.

[0043] The first detection member 21 is used to detect whether the fourth edge 522 is at a first preset position.

[0044] The second detection member 22 is used to detect whether the third edge 521 is at a second preset position.

[0045] The third detection member 23 is used to detect whether the pole piece 50 to be cut reaches the cutting position.

[0046] Among them, at least as Figure 7As shown, the to-be-cut pole piece 50 is in the shape of a rectangular thin sheet, including a left long side 503, a right long side 504, a front short side 501, and a rear short side 502. The to-be-cut pole piece 50 includes a coating area 51 and a blank area 52. The coating area 51 is coated with an electrode active coating.

[0047] In one embodiment, the to-be-cut pole piece 50 may sequentially arrange a first blank area 52a, a coating area 51, and a second blank area 52b along its width direction. The structures of the first blank area 52a and the second blank area 52b may be the same.

[0048] Both the first blank area 52a and the coating area 51 are rectangular. The coating area 51 includes a first edge 511 and a second edge 512 extending along its length direction. The width of the coating area 51 is L1, that is, the distance between the first edge 511 and the second edge 512 is L1. The first blank area 52a includes a third edge 521 and a fourth edge 522 extending along its length direction. The width of the first blank area 52a is L2, that is, the distance between the third edge 521 and the fourth edge 522 is L2. The fourth edge 522 is the right long side 504 of the to-be-cut pole piece 50. The third edge 521 coincides with the first edge 511. The third edge 521 or the first edge 511 serves as the dividing line between the first blank area 52a and the coating area 51. Similarly, the second edge 512 serves as the dividing line between the second blank area 52b and the coating area 51.

[0049] Of course, it can be understood that in another embodiment, the to-be-cut pole piece 50 may sequentially arrange a first blank area 52a and a coating area 51, or a second blank area 52b and a coating area 51 along its width direction.

[0050] The following embodiments will be described with the to-be-cut pole piece 50 sequentially arranging a first blank area 52a, a coating area 51, and a second blank area 52b along its width direction.

[0051] Among them, the conveying mechanism 10 conveys the to-be-cut pole piece 50 in the first direction, and the first direction is the length direction of the to-be-cut pole piece 50. The second direction is the width direction of the to-be-cut pole piece 50. The conveying mechanism 10 may be a belt conveying mechanism, a roller conveying mechanism, a chain conveying mechanism, etc.

[0052] In practical applications, the pole piece cutting device for experiments further includes a cutting head 70. The cutting head 70 is used to receive the detection result of the third detection piece 23 and cut the to-be-cut pole piece 50 transmitted to the cutting position.

[0053] The to-be-cut pole piece 50 is placed on the conveying mechanism 10, and the to-be-cut pole piece 50 moves along the first direction until the to-be-cut pole piece 50 reaches the preset position. Among them, at the preset position, the cutting head 70 is located directly above the to-be-cut pole piece 50, the cutting head 70 approaches the to-be-cut pole piece 50, and the cutting head 70 cuts the to-be-cut pole piece 50 to obtain the required pole piece 50a. Among them, the pole piece 50a includes a foil tab 50a1, and the above-mentioned foil tab 50a1 is formed by cutting the first blank area 52a or the second blank area 52b of the to-be-cut pole piece 50, and the foil tab 50a1 has a coating area 51 of 0.5 mm to 1 mm.

[0054] In order to ensure that the to-be-cut pole piece 50 accurately moves to the preset position, at least one of the first detection member 21 and the second detection member 22 and the third detection member 23 are provided in this application.

[0055] The first detection member 21 is used to detect whether the fourth edge 522 is at the first preset position. The first detection member 21 includes an infrared sensor, a photoelectric sensor, an ultrasonic sensor, a radar sensor, a millimeter-wave radar sensor, etc.

[0056] The second detection member 22 is used to detect whether the third edge 521 is at the second preset position. The second detection member 22 includes an infrared sensor, a photoelectric sensor, an ultrasonic sensor, a radar sensor, a millimeter-wave radar sensor, etc.

[0057] The third detection member 23 is used to detect whether the to-be-cut pole piece 50 reaches the cutting position. The third detection member 23 includes an infrared sensor, a photoelectric sensor, an ultrasonic sensor, a radar sensor, a millimeter-wave radar sensor, etc.

[0058] In an embodiment, referring to Figure 4 and Figure 5 , the first detection member 21 and the third detection member 23 are provided. Both the first and third detection members are infrared sensors, because infrared sensors are suitable for long-distance detection and have the advantages of being suitable for static detection and low cost.

[0059] Among them, the first blank area 52a of the to-be-cut pole piece 50 is cut to form the foil tab 50a1.

[0060] Such as Figure 4 and Figure 5As shown, the conveying mechanism 10 includes a first conveying component 11 and a second conveying component 12 arranged in sequence along the front-rear direction (or the first direction). Among them, the cutting head 70 is located above the second conveying component 12. The second conveying component 12 has a carrying and conveying surface, which includes a left edge 122, a right edge 121, and a front edge 123. The distance between the left edge 122 and the right edge 121 is greater than or equal to the distance between the left long side 503 and the right long side 504 of the to-be-cut pole piece 50.

[0061] As Figure 5 shown, the first detection component 21 is a first infrared sensor. The first infrared sensor can be located on the front side of the second conveying component 12, and the infrared ray of the first infrared sensor is located between the left edge 122 and the right edge 121 of the carrying and conveying surface of the second conveying component 12. There is a distance d1 between the infrared ray of the first infrared sensor and the right edge 121 of the carrying and conveying surface.

[0062] The first infrared sensor emits infrared rays. Taking the infrared rays as a reference, it detects whether the fourth edge 522 of the first blank area 52a is located at the first preset position. If the infrared ray coincides with the fourth edge 522 of the first blank area 52a, since the fourth edge 522 is also the right long side 504 of the to-be-cut pole piece 50, in this way, the right long side 504 of the to-be-cut pole piece 50 is located on the left side of the right edge 121 of the carrying and conveying surface. As Figure 5 shown, that is, the first blank area 52a is completely located on the carrying and conveying surface, avoiding the situation where the first blank area 52a is suspended. Of course, it can be understood that if the second blank area 52b of the to-be-cut pole piece 50 is cut to form the foil pole ear 50a1, then the left long side 503 of the to-be-cut pole piece 50 needs to be located on the right side of the left edge 122 of the carrying and conveying surface, that is, the second blank area 52b is completely located on the carrying and conveying surface.

[0063] In addition, based on the infrared rays emitted by the first infrared sensor, the movement of the cutting head 70 in the left-right direction is controlled. For example, as Figure 5 shown, the cutting head 70 is controlled to move leftward by a distance of L2 + 0.5 mm based on the fourth edge 522. In this way, the cutting knife of the cutting head 70 will move leftward along the first edge 511 of the coating area 51 and leave a margin of 0.5 mm. Thus, the foil pole ear 50a1 of the obtained pole piece 50a has a coating area 51 of 0.5 mm, which can accurately control the size of the coating area 51 reserved on the foil pole ear 50a1, greatly suppressing the probability of defective products, and further contributing to the development of new battery products and cost savings.

[0064] As Figure 5As shown, the third detection member 23 is a third infrared sensor. The third infrared sensor can be located on the right side of the second conveying assembly 12, and there is a distance d2 between the infrared ray of the third infrared sensor and the front edge 123 of the load-carrying conveying surface of the second conveying assembly 12.

[0065] The third infrared sensor emits infrared rays. Taking the infrared rays as a reference, it detects whether the front edge of the to-be-cut pole piece 50 reaches the cutting position. If the infrared rays coincide with the front short side 501 of the to-be-cut pole piece 50, the load-carrying conveying surface of the second conveying assembly 12 can be controlled to remain stationary. At the same time, the cutting head 70 is controlled to approach the to-be-cut pole piece 50 and cut it to obtain the pole piece 50a.

[0066] Of course, it can be understood that the infrared rays can also coincide with the rear short side 502 of the to-be-cut pole piece 50. Then, the load-carrying conveying surface of the conveying mechanism 10 is controlled to remain stationary. At the same time, the cutting head 70 is controlled to approach the to-be-cut pole piece 50 and cut it to obtain the pole piece 50a.

[0067] In the second embodiment, referring to FIGS. 4 and Figure 5 , a second detection member 22 and a third detection member 23 are provided. Among them, the first blank area 52a of the to-be-cut pole piece 50 is cut to form the foil pole ear 50a1.

[0068] As Figure 5 shown, the second detection member 22 is a second infrared sensor. The second infrared sensor can be located on the front side of the second conveying assembly 12, and the infrared ray of the second infrared sensor is located between the left edge 122 and the right edge 121 of the load-carrying conveying surface of the second conveying assembly 12, and there is a distance L2 + d1 between the infrared ray of the second infrared sensor and the right edge 121 of the load-carrying conveying surface.

[0069] The second infrared sensor emits infrared rays. Taking the infrared rays as a reference, it detects whether the third edge 521 of the first blank area 52a is located at the second preset position. If the infrared rays coincide with the third edge 521 of the first blank area 52a, since the fourth edge 522 is the right long side 504 of the to-be-cut pole piece 50, and the distance between the fourth edge 522 and the third edge 521 is L2, the right long side 504 of the to-be-cut pole piece 50 is located on the left side of the right edge 121 of the load-carrying conveying surface, that is, the first blank area 52a is completely located on the load-carrying conveying surface, avoiding the situation where the first blank area 52a is suspended. Of course, it can be understood that if the second blank area 52b of the to-be-cut pole piece 50 is cut to form the foil pole ear 50a1, the left long side 503 of the to-be-cut pole piece 50 needs to be located on the right side of the left edge 122 of the load-carrying conveying surface, that is, the second blank area 52b is completely located on the load-carrying conveying surface.

[0070] In addition, based on the infrared rays emitted by the second infrared sensor, the movement of the cutting head 70 in the left-right direction is controlled. For example, as Figure 5 shown, the cutting blade of the cutting head 70 is controlled to move 0.5 mm to the left based on the third edge 521. In this way, the foil tab 50a1 of the electrode tab 50a obtained by cutting with the cutting head 70 has a coating area 51 of 0.5 mm, and the size of the reserved coating area 51 on the foil tab 50a1 can be accurately controlled, greatly suppressing the probability of defective products, and thus contributing to the development of new battery products and cost savings.

[0071] Among them, the position and structure of the third detection member 23 in the second embodiment may be the same as those of the third detection member 23 in the first embodiment. Therefore, referring to the description of the third detection member 23 in the first embodiment, it will not be elaborated here.

[0072] In the third embodiment, as Figure 4 and Figure 5 shown, a first detection member 21, a second detection member 22, and a third detection member 23 are provided. Among them, the first blank area 52a of the electrode tab 50 to be cut is cut to form a foil tab 50a1.

[0073] The positions and structures of the first detection member 21, the second detection member 22, and the third detection member 23 may be the same as those of the first detection member 21, the second detection member 22, and the third detection member 23 in the first and second embodiments. Therefore, referring to the descriptions in the first and second embodiments, it will not be elaborated here.

[0074] Among them, the first detection member 21 is a first infrared sensor, the second detection member 22 is a second infrared sensor, and the third detection member 23 is a third infrared sensor, which helps to reduce production costs.

[0075] The first infrared sensor emits infrared rays. Taking the infrared rays as a reference, it detects whether the fourth edge 522 of the first blank area 52a is located at a first preset position. The second infrared sensor emits infrared rays. Taking the infrared rays as a reference, it detects whether the third edge 521 of the first blank area 52a is located at a second preset position. In this way, the size of the reserved coating area 51 on the foil tab 50a1 can be ensured doubly, further suppressing the probability of defective products, and further contributing to the development of new battery products and cost savings.

[0076] In addition, it should be noted that the movement of the cutting head 70 in the left-right direction can be based on the infrared rays emitted by the second infrared sensor, or the infrared rays emitted by the first infrared sensor.

[0077] Among them, the following embodiments are described with the third embodiment:

[0078] As an implementable manner, the distance between the first detection member 21 and the second detection member 22 can be adjusted.

[0079] As Figures 2-5 shown in the figure, the first detection member 21 and the second detection member 22 are located on the front side of the second conveying assembly 12. The first detection member 21 and the second detection member 22 are mounted on the first support frame 30. Specifically,

[0080] the first support frame 30 is located on the front side of the second conveying assembly 12. The first support frame 30 includes a first slider 31, a second slider 32, and a guide rail 33 extending in the left-right direction. The first slider 31 and the second slider 32 are slidably engaged with the guide rail 33. The first detection member 21 is connected to the first slider 31, and the second detection member 22 is connected to the second slider 32.

[0081] In this way, the distance between the first detection member 21 and the second detection member 22 can be adjusted according to the L2 dimension of the blank area 52 on the to-be-cut pole pieces 50 of different types, so that the first detection member 21 and the second detection member 22 are adapted to detect to-be-cut pole pieces 50 of different types.

[0082] Of course, it can be understood that the first detection member 21 can be located on the front side of the conveying mechanism 10, and the second detection member 22 can be located on the rear side of the conveying mechanism 10.

[0083] Similarly, the third detection member 23 is located on the right side of the second conveying assembly 12 through the second support frame 40. Among them, the second support frame 40 can enable the third detection member 23 to be adjusted in the front-rear direction, so that the third detection member 23 is adapted to detect to-be-cut pole pieces 50 of different types.

[0084] As an implementable manner, the first conveying assembly 11 is a roller conveying assembly, and the second conveying assembly 12 is a belt conveying assembly.

[0085] The belt conveying assembly includes a belt. A protection plate is arranged on the belt, and a PET film is arranged on the protection plate. The protection plate is used to increase the hardness and support capacity of the belt, and the PET film is used to carry the to-be-cut pole pieces 50. The above-mentioned load-bearing conveying surface is on the surface where the PET film is in contact with the to-be-cut pole pieces 50. Among them, the PET film bears the downward cutting pressure of the cutter of the cutting head 70 and the cutting marks of the cutter edge of the cutter when cutting downward. This helps to complete the cutting of the pole piece 50a.

[0086] It should be noted that the PET film needs to be replaced after the number of die-cutting times reaches a certain number. Because as the number of cutting times increases, the imprint of the cutter edge of the cutter on the PET film when cutting downward will gradually deepen, causing the PET film to be damaged more and more seriously until it is scrapped.

[0087] As an implementable manner, the pole piece cutting device for experiments further includes a deviation rectifying mechanism 60.

[0088] The deviation rectifying mechanism 60 can be located on one or both sides of the conveying mechanism 10 in the second direction. The deviation rectifying mechanism 60 is used to rectify the position of the to-be-cut pole piece 50 in the second direction, so that the fourth edge 522 is at the first preset position, and / or the third edge 521 is at the second preset position.

[0089] As Figure 4 and Figure 6 shown, deviation rectifying mechanisms 60 are respectively arranged on the left side and the right side of the first conveying component 11. The deviation rectifying mechanism 60 includes a plurality of guide wheels 61. The guide wheels 61 are in rolling contact with the left long side 503 of the to-be-cut pole piece 50, and the guide wheels 61 are in rolling contact with the right long side 504 of the to-be-cut pole piece 50. In this way, when the to-be-cut pole piece 50 moves from back to front, the guide wheels 61 can limit the freedom degree of the to-be-cut pole piece 50 in the left-right direction, suppress the left-right swing of the to-be-cut pole piece 50, and help the first infrared sensor to emit infrared rays to coincide with the fourth edge 522 of the first blank area 52a, and the second infrared sensor to emit infrared rays to coincide with the third edge 521 of the first blank area 52a.

[0090] It should be understood that for the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. involved above, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0091] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principle. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solution formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A pole piece cutting device, characterized in that: include: At least one of a first detection member (21) and a second detection member (22), a conveying mechanism (10) and a third detection member (23); The conveying mechanism (10) transports the electrode piece (50) to be cut along a first direction, the first direction being the length direction of the electrode piece (50) to be cut, the electrode piece (50) to be cut comprises a coating area (51) and a blank area (52) arranged along a second direction, the second direction being the width direction of the electrode piece (50) to be cut, the coating area (51) comprises a first edge (511) extending along the first direction, the blank area (52) comprises a third edge (521) and a fourth edge (522) extending along the first direction, the third edge (521) coincides with the first edge (511); a first detection member (21), the first detection member (21) being used to detect whether the fourth edge (522) is at a first preset position; a second detection member (22), the second detection member (22) being used to detect whether the third edge (521) is at a second preset position; A third detection member (23), the third detection member (23) is used to detect whether the electrode piece (50) to be cut is transferred to the cutting position.

2. The pole piece cutting device according to claim 1, characterized in that: It comprises the first detection component (21), the second detection component (22) and the third detection component (23).

3. The pole piece cutting device according to claim 2, characterized in that: The distance between the first detection member (21) and the second detection member (22) can be adjusted.

4. The pole piece cutting device according to claim 3, characterized in that: The first detection member (21) and the second detection member (22) are located on the same side of the conveying mechanism (10) in the first direction, or the first detection member (21) and the second detection member (22) are respectively located on both sides of the conveying mechanism (10) in the first direction.

5. The pole piece cutting device according to claim 4, characterized in that: The device further comprises a first support frame (30) located on one side of the conveying mechanism (10) in the first direction, the first support frame (30) comprising a first slider (31), a second slider (32) and a guide rail (33) extending along the second direction, the first slider (31), the second slider (32) and the guide rail (33) being slidably matched. The first detecting member (21) is connected to the first sliding block (31), and the second detecting member (22) is connected to the second sliding block (32).

6. The pole piece cutting device according to claim 2, characterized in that: The first detection member (21), the second detection member (22) and the third detection member (23) are all the same. The first detection element (21) comprises an infrared sensor, a photoelectric sensor, an ultrasonic sensor, a radar sensor, and a millimeter wave radar sensor.

7. The pole piece cutting device according to claim 6, characterized in that: The first detection element (21) is an infrared sensor.

8. The pole piece cutting device according to any one of claims 1 to 7, characterized in that: It also includes a deviation correction mechanism (60), The conveying mechanism (10) is provided with the correcting mechanism (60) on one side or both sides in the second direction, and the correcting mechanism (60) is used to correct the position of the pole piece (50) to be cut in the second direction so that the fourth edge (522) is at the first preset position, or / and the third edge (521) is at the second preset position.

9. The pole piece cutting device according to claim 8, characterized in that: The deviation correction mechanism (60) comprises a plurality of guide wheels (61), and the guide wheels (61) are in rolling contact with the long sides of the pole pieces (50) to be cut.

10. The pole piece cutting device according to any one of claims 1 to 7, characterized in that: It also includes a cutting machine head (70), the cutting machine head (70) being used to receive the detection result of the third detection member (23) and to cut the electrode piece (50) to be cut that is transmitted to the cutting position; The conveying mechanism (10) comprises a first conveying assembly (11) and a second conveying assembly (12) which are arranged in sequence along the first direction, and the cutting machine head (70) is located above the second conveying assembly (12).

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