A method for feeding a pole piece during winding and a winding device

Abstract

The present application provides a method for feeding and winding a pole piece and a winding device. The method for feeding and winding a pole piece includes: detecting whether the next section of the pole piece is qualified; in response to the next section of the pole piece being a qualified section of the pole piece, performing chasing cutting and winding on the qualified section of the pole piece; in response to the next section of the pole piece being a defective section of the pole piece, performing single winding on the defective section of the pole piece. Among them, the step of performing single winding on the defective section of the pole piece includes: the feeding component sending the head of the defective section of the pole piece to the sheet feeding component; the feeding component and the cutting component avoiding the single winding component, and the feeding component retreating by a compensation distance; the single winding component extending to the conveying route of the pole piece, and the single winding component winding the defective section of the pole piece; when the single winding is completed, the feeding component clamping the head of the qualified section of the pole piece, and the cutting component cutting off the tail of the defective section of the pole piece; the single winding component retracting, the cutting component avoiding the feeding component, and the feeding component sending the head of the qualified section of the pole piece to the sheet feeding component. The method for feeding and winding a pole piece can improve the winding efficiency of the battery cell.

Description

Technical Field

[0001] The present application relates to the field of core winding, in particular to a method for feeding a pole piece during winding and a winding device. Background Art

[0002] The winding process of the core winds the pole piece and the separator through a winding assembly.

[0003] In the traditional winding process, the pole piece supplied in the form of a strip is intermittently transported. In order to improve the winding efficiency, the chasing cutting method is often used at present. The pole piece is continuously transported forward, and the feeding assembly and the cutting assembly follow the pole piece until they are synchronized with the pole piece. When the winding assembly winds enough pole pieces, the feeding assembly clamps the next section of the pole piece, the cutting assembly cuts off the pole piece, and then the fully loaded winding assembly unloads or switches to an empty winding assembly. The feeding assembly sends the next section of the pole piece to the winding assembly, and finally the feeding assembly and the cutting assembly reset for the next chasing cut.

[0004] In the traditional winding process, if there is a defect in a certain section of the pole piece, only the entire core containing this section of the pole piece can be removed after winding. In order to reduce waste, the single-winding method is often used at present. An additional single-winding assembly is provided between the cutting assembly and the winding assembly. During normal winding, the single-winding assembly is hidden. When it is detected that there is a defect in the pole piece, the single-winding assembly extends out to receive the pole piece sent by the feeding assembly. After receiving a defective section of the pole piece, the feeding assembly clamps the next section of the pole piece, the cutting assembly cuts off the pole piece, the single-winding assembly is hidden, and the feeding assembly sends the next section of the pole piece to the winding assembly to re-perform the normal winding operation.

[0005] Whether in the traditional chasing cutting method or the single-winding method, when the feeding assembly clamps the next section of the pole piece and the cutting assembly cuts off the tail of the previous section of the pole piece, the feeding assembly will directly take the next section of the pole piece to the winding assembly to start a new winding. During the feeding process, the feeding assembly will approach the cutting assembly, so that the head of the next section of the pole piece passes through the cutting assembly. Since the feeding assembly cannot interfere with the cutting assembly during the feeding process, the distance between the feeding assembly and the cutting assembly when the cutting assembly cuts off the pole piece determines the distance that the feeding assembly can send out the pole piece, and this distance also determines the length of the free section of the head of the pole piece clamped by the feeding assembly.

[0006] At present, when the chasing cutting method and the single-winding method are combined, the problem of feeding failure often occurs. The reason is that during single-winding, the chasing cutting route of the cutting assembly will interfere with the extended single-winding assembly. Therefore, during single-winding, the cutting assembly and the feeding assembly still use fixed cutting. Compared with the starting position during normal chasing cutting, the position of the feeding assembly is closer to the cutting assembly during fixed cutting, so that during the next normal chasing cutting, the stroke of the feeding assembly is not enough to send the pole piece into the winding assembly, resulting in feeding failure.

[0007] To solve this problem, some current winding processes add a compensation action in the single-winding step. That is, after the cutting component cuts off the pole piece, the sheet feeding component does not immediately feed out the next section of the pole piece. Instead, it first releases the pole piece, retreats a compensation distance, and then feeds out the next section of the pole piece. However, this processing method increases the time consumption of the single-winding step, resulting in a decrease in the winding efficiency of the battery cell. Summary of the Invention

[0008] This application aims to solve at least one of the technical problems existing in the prior art. For this reason, this application proposes a pole piece winding and sheet feeding method and a winding device. The pole piece winding and sheet feeding method can avoid the problem of sheet feeding failure of the sheet feeding component caused by insufficient travel of the sheet feeding component after a single winding of a defective section of the pole piece, and at the same time can improve the winding efficiency of the battery cell.

[0009] According to the pole piece winding and sheet feeding method provided by this application, it includes:

[0010] Detect whether the next section of the pole piece is qualified;

[0011] In response to the next section of the pole piece being a qualified section of the pole piece, perform chasing cutting and winding on the qualified section of the pole piece;

[0012] In response to the next section of the pole piece being a defective section of the pole piece, perform single winding on the defective section of the pole piece;

[0013] Among them, the step of performing single winding on the defective section of the pole piece includes:

[0014] The sheet feeding component sends the head of the defective section of the pole piece to the sheet entering component, and the sheet entering component is located between the single winding component and the winding component;

[0015] The sheet feeding component and the cutting component avoid the single winding component, and the sheet feeding component retreats a compensation distance;

[0016] The single winding component extends to the conveying route of the pole piece, and the single winding component winds the defective section of the pole piece;

[0017] When the single winding is completed, the sheet feeding component clamps the head of the qualified section of the pole piece, and the cutting component cuts off the tail of the defective section of the pole piece;

[0018] The single winding component retracts, the cutting component avoids the sheet feeding component, and the sheet feeding component sends the head of the qualified section of the pole piece to the sheet entering component.

[0019] According to the electrode sheet winding and feeding method provided in the present application, at least the following technical effects are achieved: the sheet feeding component indirectly feeds out the defective electrode sheet segment through the sheet feeding component; after the sheet feeding component receives the defective electrode sheet segment, the sheet feeding component retreats to avoid the single roll component, and retreats an additional compensation distance, so that the distance between the sheet feeding component and the cutting component can meet the stroke requirement of the sheet feeding component; the electrode sheet winding and feeding method can avoid sheet feeding failure caused by insufficient stroke of the sheet feeding component; on the other hand, the retreat process of the sheet feeding component is carried out in parallel with the process of the single roll component extending and winding the defective electrode sheet segment, thereby reducing the time consumption of the single roll step; the electrode sheet winding and feeding method can improve the efficiency of battery cell winding.

[0020] According to some embodiments of the present application, the step of performing follow-up cutting and winding on the qualified segment pole piece includes:

[0021] The cutting assembly avoids the sheet feeding assembly, and the sheet feeding assembly delivers the head of the qualified segment electrode sheet to the sheet feeding assembly;

[0022] The sheet feeding assembly retreats to a follow-up clamping waiting position, and the cutting assembly retreats to a follow-up cutting waiting position;

[0023] The sheet feeding assembly delivers the head of the qualified segment pole sheet to the winding assembly, and the winding assembly winds the qualified segment pole sheet;

[0024] When winding is completed, the sheet feeding assembly and the cutting assembly follow the pole piece at the moving speed of the pole piece;

[0025] When the speeds of the sheet feeding assembly, the cutting assembly and the pole piece are synchronized, the sheet feeding assembly clamps the next section of the pole piece, and the cutting assembly cuts off the pole piece.

[0026] According to some embodiments of the present application, after retreating the compensation distance, the distance between the sheet feeding assembly and the cutting assembly is L1, and when delivering the qualified segment pole piece, the distance between the sheet feeding assembly and the sheet feeding assembly is L2, and L1 is greater than L2.

[0027] According to some embodiments of the present application, during the process of the sheet feeding assembly retreating a compensation distance, the sheet feeding assembly retreats to the follow-up clamping waiting position, and during the process of the cutting assembly avoiding the single roll assembly, the cutting assembly retreats to the follow-up cutting waiting position.

[0028] According to some embodiments of the present application, the pole piece winding and feeding method further includes: before the feeding component and the cutting component avoid the single roll component, the normally open component located at the chasing and clamping waiting position avoids the feeding component; after the feeding component delivers the head of the qualified segment pole piece to the feeding component, the pole piece winding and feeding method further includes: the normally open component is reset.

[0029] According to some embodiments of the present application, during the process of the cutting assembly avoiding the sheet feeding assembly, the cutting assembly moves to the chasing cutting termination position.

[0030] The winding device provided by the present application at least includes a sheet feeding assembly, a cutting assembly, a single winding assembly, a sheet feeding-in assembly, and a winding assembly arranged in sequence along the conveying route of the pole piece. The sheet feeding assembly and the cutting assembly can move along the conveying route. Taking the conveying route as the reference plane, the single winding assembly can approach or move away from the reference plane. The winding device is used to implement the pole piece winding and sheet feeding method described in the present application.

[0031] According to some embodiments of the present application, the winding device includes a normally open assembly arranged at the chasing and clamping waiting position. The normally open assembly includes a driver and a limiting plate. The driver can drive the limiting plate to approach or move away from the sheet feeding assembly.

[0032] According to some embodiments of the present application, the sheet feeding assembly includes a first clamping portion and a second clamping portion. The first clamping portion is provided with a first rolling body. The limiting plate includes a limiting surface. The limiting surface contacts the first rolling body to limit the first clamping portion.

[0033] According to some embodiments of the present application, the normally open assembly includes a connecting plate installed at the output end of the driver. The driver can drive the connecting plate to move in a direction parallel to the conveying route. The connecting plate is provided with a rolling body. The limiting plate is provided with a connecting groove inclined in the direction of the conveying route. The rolling body is embedded in the connecting groove.

[0034] The winding device provided by the present application is used to implement the pole piece winding and sheet feeding method described in the present application. Therefore, the winding device provided by the present application has the beneficial effects brought by the pole piece winding and sheet feeding method, which will not be elaborated here. Description of the Drawings

[0035] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0036] Figure 1 is the overall flow schematic diagram of the pole piece winding and sheet feeding method according to some embodiments of the present application;

[0037] Figure 2 is the specific flow schematic diagram of the pole piece winding and sheet feeding method according to some embodiments of the present application;

[0038] Figure 3 is the action process schematic diagram of the winding device according to some embodiments of the present application;

[0039] Figure 4 It is a schematic diagram of the operation process of the winding device according to some embodiments of the present application;

[0040] Figure 5 It is a schematic structural diagram of the sheet feeding component and the normally open component of the winding device according to some embodiments of the present application.

[0041] Reference numerals:

[0042] Sheet feeding component 100, first clamping portion 110, first rolling body 111, second clamping portion 120, clamping cylinder 130, cutting component 200, single roll component 300, winding component 400, normally open component 500, driver 510, limit plate 520, connection groove 521, connecting plate 530, sheet feeding-in component 600. Detailed implementation manners

[0043] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation of the present application.

[0044] In the description of the present application, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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, and therefore should not be construed as a limitation of the present application.

[0045] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, understand greater than, less than, exceeding, etc. as not including the number itself, and understand above, below, within, etc. as including the number itself. If the first and second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0046] In the description of the present application, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0047] According to the pole piece winding and sheet feeding method provided by the present application, it includes:

[0048] Step S100: Detect whether the next section of the pole piece is qualified;

[0049] Step S200: In response to the next section of the pole piece being a qualified pole piece, perform trailing cut winding on the qualified pole piece;

[0050] Step S300: In response to the next section of the pole piece being a defective pole piece, perform single winding on the defective pole piece;

[0051] Further refer to Figure 1 , where Step S300 specifically includes:

[0052] Step S310: The sheet feeding assembly 100 sends the head of the defective pole piece to the sheet feeding-in assembly 600, and the sheet feeding-in assembly 600 is located between the single winding assembly 300 and the winding assembly 400;

[0053] Step S320: The sheet feeding assembly 100 and the cutting assembly 200 avoid the single winding assembly 300, and the sheet feeding assembly 100 retreats by a compensation distance;

[0054] Step S330: The single winding assembly 300 extends to the conveying route of the pole piece, and the single winding assembly 300 winds the defective pole piece;

[0055] Step S340: When single winding is completed, the sheet feeding assembly 100 clamps the head of the qualified pole piece, and the cutting assembly 200 cuts off the tail of the defective pole piece;

[0056] Step S350: The single winding assembly 300 retracts, the cutting assembly 200 avoids the sheet feeding assembly 100, and the sheet feeding assembly 100 sends the head of the qualified pole piece to the sheet feeding-in assembly 600.

[0057] "Front" and "rear" are defined in the conveying direction of the pole piece. The direction same as the conveying direction of the pole piece is the forward direction, and the direction opposite to the conveying direction of the pole piece is the rear direction.

[0058] "The single winding assembly 300 retracts" means that the single winding assembly 300 carries the wound defective pole piece and exits the conveying route of the pole piece to avoid interference with the trailing cut winding.

[0059] In the cell winding process integrating the trailing cut method and the single winding method, there is interference between the route of the cutting assembly 200 and the position of the single winding assembly 300. Therefore, the cutting assembly 200 needs to avoid to enable the single winding assembly 300 to extend. Since the sheet feeding assembly 100 needs to directly feed the sheet to the single winding assembly 300, and the single winding method uses fixed cutting, compared with the starting position during normal trailing cut, the position of the sheet feeding assembly 100 is closer to the cutting assembly 200 during fixed cutting, resulting in the stroke of the sheet feeding assembly 100 being insufficient to send the pole piece into the winding assembly 400 during the next normal trailing cut, leading to sheet feeding failure.

[0060] In the electrode sheet winding and feeding method of the present application, the feeding assembly 100 indirectly feeds out the bad segment electrode sheet through the feeding assembly 600. After the feeding assembly 600 receives the bad segment electrode sheet, the feeding assembly 100 retreats to avoid the single roll assembly 300, and the feeding assembly 100 retreats an additional compensation distance, so that the distance between the feeding assembly 100 and the cutting assembly 200 can meet the travel requirements of the feeding assembly 100. The electrode sheet winding and feeding method can avoid the failure of feeding due to insufficient travel of the feeding assembly. At the same time, the retreat process of the feeding assembly 100 is carried out in parallel with the process of the single roll assembly 300 extending and winding the bad segment electrode sheet, thereby reducing the time consumption of the single roll step. The electrode sheet winding and feeding method can improve the efficiency of battery cell winding.

[0061] It can be understood that in the winding process, the electrode sheets are transported in the form of a material strip, the defective parts in the material strip are called defective segment electrode sheets, and the qualified parts in the material strip are called qualified segment electrode sheets. In step S330, the single-roll component 300 will wind up all the defective segment electrode sheets. Therefore, in the next step, the electrode sheet clamped by the sheet feeding component 100 is a qualified segment electrode sheet, which can be directly sent to the winding component 400 for winding through step S360.

[0062] As before, since the feeding assembly 100 cannot interfere with the cutting assembly 200, the distance that the feeding assembly 100 can feed the pole piece cannot exceed the length of the free section of the pole piece head. The "free section" refers to the portion of the pole piece head that is not clamped by the feeding assembly 100.

[0063] The distance between the sheet-feeding assembly 100 and the cutting assembly 200 after the backward compensation distance is defined as L1, and the distance between the sheet-feeding assembly 100 and the sheet-entering assembly 600 when delivering the qualified segment pole piece is defined as L2. L1 must be greater than L2 to avoid sheet-feeding failure due to insufficient stroke of the sheet-feeding assembly.

[0064] Continue to refer to Figure 2 According to some embodiments of the present application, step S200 specifically includes:

[0065] Step S210: the cutting assembly 200 avoids the sheet feeding assembly 100, and the sheet feeding assembly 100 delivers the head of the qualified segment electrode sheet to the sheet feeding assembly 600;

[0066] Step S220: the sheet feeding assembly 100 retreats to the clamping waiting position, and the cutting assembly 200 retreats to the cutting waiting position;

[0067] Step S230: the sheet feeding assembly 600 delivers the head of the qualified segment of the pole sheet to the winding assembly 400, and the winding assembly 400 winds the qualified segment of the pole sheet;

[0068] Step S240: When the winding is completed, the sheet feeding assembly 100 and the cutting assembly 200 follow the pole piece at the moving speed of the pole piece;

[0069] Step S250: When the speeds of the sheet feeding component 100, the cutting component 200, and the pole piece are synchronized, the sheet feeding component 100 clamps the next section of the pole piece, and the cutting component 200 cuts off the pole piece.

[0070] Next, with reference to Figure 3 and Figure 4 , during the winding and chasing cutting process, the movement route of the sheet feeding component 100 is defined as the chasing and clamping route, and the movement route of the cutting component 200 is defined as the chasing and cutting route. The chasing and clamping waiting position refers to the waiting position where the sheet feeding component 100 waits to start chasing and clamping during the winding process of the winding component 400. The chasing and cutting waiting position refers to the waiting position where the cutting component 200 waits to start chasing and cutting during the winding process of the winding component 400.

[0071] It can be understood that the chasing cutting and winding of the current pole piece starts from the sheet feeding component 100 clamping the current pole piece and the cutting component 200 cutting off the pole piece between the current pole piece and the previous section of the pole piece. First, sheet feeding is performed. During sheet feeding, the sheet feeding component 100 gradually approaches the cutting component 200, so that the free section at the head of the current pole piece passes through the cutting component 200 until it enters the sheet feeding component 600. Subsequently, the sheet feeding component 100 and the cutting component 200 are reset and wait for the winding component 400 to wind. When the winding is completed, the sheet feeding component 100 performs chasing and clamping, and the cutting component 200 performs chasing and cutting, completing a chasing cutting and winding process. At this time, it is determined whether to perform single winding or chasing cutting and winding according to whether the next section of the pole piece is a qualified section pole piece or a defective section pole piece.

[0072] As before, the chasing and clamping waiting position is the position where the sheet feeding component 100 waits during normal chasing and clamping, and the chasing and cutting waiting position is the position where the cutting component 200 waits during normal chasing and cutting. When the sheet feeding component 100 is at the chasing and clamping waiting position and the cutting component 200 is at the chasing and cutting waiting position, the stroke of the sheet feeding component 100 can of course meet the sheet feeding requirements of the sheet feeding component 100 during the winding and chasing cutting process. Therefore, in some embodiments, in step S320, the sheet feeding component 100 retreats to the chasing and clamping waiting position, and the cutting component 200 retreats to the chasing and cutting waiting position. In this way, when performing step S350, the sheet feeding component 100 and the cutting component 200 can directly reuse their own movement routes during winding and chasing cutting, which helps to simplify the mechanical structure design and program design related to driving the movement of the sheet feeding component 100 and the cutting component 200.

[0073] However, in the chasing method, a normally open component 500 is provided at the chasing waiting position. The normally open component 500 ensures through mechanical limiting that the sheet feeding component 100 at this position can always remain open, preventing the sheet feeding component 100 from accidentally clamping the pole piece during the transportation of the pole piece. If the normally open component 500 exerts an effect on the sheet feeding component 100 after the sheet feeding component 100 retreats to the chasing waiting position, the sheet feeding component 100 will not be able to clamp the qualified section of the pole piece in the subsequent step S340.

[0074] Therefore, in some embodiments, before the sheet feeding component 100 and the cutting component 200 avoid the single winding component 300, the pole piece winding and feeding method further includes: the normally open component 500 at the chasing waiting position avoids the sheet feeding component 100. This enables the sheet feeding component 100 to clamp the qualified section of the pole piece at the chasing waiting position.

[0075] Correspondingly, after the sheet feeding component 100 sends the head of the qualified section of the pole piece to the sheet feeding-in component 600, the pole piece winding and feeding method further includes: the normally open component 500 resets, so that in step S200, the normally open component 500 can normally play the role of keeping the sheet feeding component 100 normally open.

[0076] During the process of the sheet feeding component 100 sending out the qualified section of the pole piece, the cutting component 200 needs to perform corresponding avoidance. In some embodiments, the cutting component 200 moves to the chasing cutting termination position to avoid the sheet feeding component 100.

[0077] It can be understood that when performing the chasing cutting motion to cut the pole piece, the speed of the cutting component 200 is synchronized with the speed of the pole piece. Therefore, after the cutting is completed, the cutting component 200 needs to gradually decelerate and then reverse and accelerate to reset to the chasing cutting waiting position. The chasing cutting termination position refers to the position where the cutting component 200 decelerates to a standstill, that is, the most forward position of the cutting component 200 during the chasing cutting process.

[0078] The cutting component 200 avoiding the sheet feeding component 100 at the chasing cutting termination position can maximize the avoidance effect of the cutting component 200, reduce the free section length required for sheet feeding, and avoid the situation where the free section at the head of the pole piece is too long, causing the pole piece to bend and deform under its own weight, resulting in sheet feeding failure.

[0079] This application also provides a winding device, which at least includes a sheet feeding component 100, a cutting component 200, a single winding component 300, a sheet feeding-in component 600, and a winding component 400 arranged in sequence along the transportation route of the pole piece. The sheet feeding component 100 and the cutting component 200 can move along the transportation route. Taking the transportation route as the reference plane, the single winding component 300 can approach or move away from the reference plane. The winding device is used to implement the pole piece winding and feeding method provided by this application. Figure 3 and Figure 4Shows the layout and operation process of some embodiments of the winding device.

[0080] Specifically, refer to Figure 3 and Figure 4 , Figure 3 , Figure 4 which respectively show the relative position relationships of various parts in the winding device at step S330 and step S350. In the embodiments shown in Figure 3 and Figure 4 , the sheet feeding assembly 100 includes a first clamping portion 110 and a second clamping portion 120, the first clamping portion 110 and the second clamping portion 120 can approach or separate from each other, the cutting assembly 200 includes a cutter, the single-roll assembly 300 includes a single-roll needle, the winding assembly 400 includes a winding needle, and the sheet feeding-in assembly 600 includes a deviation rectifying roller. The winding device further includes a normally-open assembly 500 which is arranged at the chasing and clamping waiting position. In the figure, labels A, B, C, and D are used in combination with the center line to respectively identify the positions of the chasing and clamping waiting position, the chasing and cutting waiting position, the position when the sheet feeding assembly 100 sends out a qualified section of the pole piece, and the chasing and cutting termination position on the conveying route of the pole piece. It can be understood that the actual mechanical structure is not an ideal mass point, so the "position" actually refers to an area with a certain range. Figure 3 and Figure 4 The reference lines identified by labels A, B, C, and D are selected within the area, and of course, the reference lines can also be set at other positions within the area, as long as the reference lines used for comparison are consistent.

[0081] Figure 3 In , the normally-open assembly 500 is far from the sheet feeding assembly 100, thus releasing the coupling relationship between the normally-open assembly 500 and the sheet feeding assembly 100 to allow the sheet feeding assembly 100 to retreat to the chasing and clamping waiting position. At this time, the distance between the sheet feeding assembly 100 and the cutting assembly 200 is L1. Figure 4 In , when the sheet feeding assembly 100 is at the moment of just sending out a qualified section of the pole piece, the distance between the sheet feeding assembly 100 and the sheet feeding-in assembly 600 is L2, and L1 is greater than L2, thus meeting the sheet feeding requirements. At this time, the normally-open assembly 500 has been reset, so after the sheet feeding assembly 100 retreats to the chasing and clamping waiting position, the normally-open assembly 500 will ensure that the sheet feeding assembly 100 remains open.

[0082] Specifically refer to Figure 5 , in some embodiments, the normally-open assembly 500 includes a driver 510 and a limit plate 520, and the driver 510 can drive the limit plate 520 to approach or separate from the sheet feeding assembly 100. The limit plate 520 can keep the sheet feeding assembly 100 open by limiting the first clamping portion 110. For example, in Figure 5Among them, the sheet feeding assembly 100 includes a first clamping portion 110 and a second clamping portion 120. The first rolling body 111 is installed on the first clamping portion 110. The limiting plate 520 includes a limiting surface, and the limiting surface contacts the first rolling body 111 to limit the first clamping portion 110.

[0083] The normally open assembly 500 includes a connecting plate 530. The connecting plate 530 is installed at the output end of the driver 510. The driver 510 can drive the connecting plate 530 to move in a direction parallel to the conveying route. The connecting plate 530 is installed with rolling bodies. The limiting plate 520 is provided with a connecting groove 521 inclined in the direction of the conveying route, and the rolling bodies are embedded in the connecting groove 521. The connecting groove 521 converts the movement of the connecting plate 530 parallel to the conveying route into the movement of the limiting plate 520 perpendicular to the conveying route, so that the design of the normally open assembly 500 can be more compact. After the limiting plate 520 is moved away, the sheet feeding assembly 100 can normally drive the first clamping portion 110 and the second clamping portion 120 to clamp through the clamping cylinder 130.

[0084] It can be understood that the content in the embodiment of the pole piece winding and sheet feeding method provided in this application is applicable to the embodiment of the winding device of this application, and the beneficial effects achieved are also the same as those achieved by the embodiment of the pole piece winding and sheet feeding method provided in this application.

[0085] Next, refer to Figures 1 to 4 A specific embodiment is used to describe in detail the pole piece winding and sheet feeding method provided according to this application. It should be understood that the following description is only an exemplary illustration and not a specific limitation to this application. This specific embodiment can also be replaced by the corresponding technical features above or combined with the technical features above.

[0086] Refer to Figure 1 , the pole piece winding and sheet feeding method includes:

[0087] Step S100: Detect whether the next section of the pole piece is qualified;

[0088] Step S200: In response to the next section of the pole piece being a qualified section of the pole piece, perform chasing cutting and winding on the qualified section of the pole piece;

[0089] Step S300: In response to the next section of the pole piece being a defective section of the pole piece, perform single winding on the defective section of the pole piece.

[0090] Further refer to Figure 2 , wherein, step S200 specifically includes:

[0091] Step S210: The cutting assembly 200 moves to the chasing cutting termination position, and the sheet feeding assembly 100 sends the head of the qualified section of the pole piece to the sheet feeding assembly 600;

[0092] Step S220: the sheet feeding assembly 100 retreats to the clamping waiting position, and the cutting assembly 200 retreats to the cutting waiting position;

[0093] Step S230: the sheet feeding assembly 600 delivers the head of the qualified segment of the pole sheet to the winding assembly 400, and the winding assembly 400 winds the qualified segment of the pole sheet;

[0094] Step S240: When the winding is completed, the sheet feeding assembly 100 and the cutting assembly 200 follow the pole piece at the moving speed of the pole piece;

[0095] Step S250: When the speeds of the sheet feeding assembly 100, the cutting assembly 200 and the pole piece are synchronized, the sheet feeding assembly 100 clamps the next section of the pole piece, and the cutting assembly 200 cuts off the pole piece.

[0096] Wherein, step S300 specifically includes:

[0097] Step S310: the cutting assembly 200 moves to the follow-up cutting end position, and the sheet feeding assembly 100 delivers the head of the defective segment electrode sheet to the sheet feeding assembly 600;

[0098] Step S320: the normally open component 500 at the clamping waiting position avoids the sheet feeding component 100, the sheet feeding component 100 retreats to the clamping waiting position, and the cutting component 200 retreats to the cutting waiting position;

[0099] Step S330: the single-roll assembly 300 extends to the conveying route of the electrode piece, the single-roll assembly 300 obtains the defective electrode piece, the feeding assembly 600 releases the defective electrode piece, and the single-roll assembly 300 winds the defective electrode piece;

[0100] Step S340: when a single roll is completed, the feeding assembly 100 clamps the head of the qualified segment of the electrode, and the cutting assembly 200 cuts off the tail of the defective segment of the electrode;

[0101] Step S350: the single roll assembly 300 retracts, the cutting assembly 200 moves to the follow-up cutting end position, the sheet feeding assembly 100 delivers the head of the qualified segment electrode sheet to the sheet feeding assembly 600, and the normally open assembly 500 is reset.

[0102] Among them, refer to Figure 3 and Figure 4 The distance between the sheet feeding assembly 100 at the clamping waiting position and the cutting assembly 200 at the cutting waiting position is L1, and the distance between the sheet feeding assembly 100 and the sheet feeding assembly 600 when delivering the qualified segment pole piece is L2, and L1 is greater than L2.

[0103] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0104] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of this application, and the scope of this application is defined by the claims and their equivalents.

[0105] In some alternative embodiments, the functions / operations mentioned in the block diagrams may not occur in the order mentioned in the operation diagrams. For example, depending on the functions / operations involved, two consecutive blocks shown may actually be executed substantially simultaneously or the blocks can sometimes be executed in the reverse order. In addition, the embodiments presented and described in the flowcharts of this application are provided by way of example for the purpose of providing a more comprehensive understanding of the technology. The disclosed methods are not limited to the operations and logical flows presented herein. Alternative embodiments are foreseeable, where the order of various operations is changed and the sub-operations described as part of a larger operation are executed independently.

[0106] In addition, although this application is described in the context of functional modules, it should be understood that unless otherwise stated to the contrary, one or more of the functions and / or features can be integrated in a single physical device and / or software module, or one or more functions and / or features can be implemented in separate physical devices or software modules. It can also be understood that a detailed discussion of the actual implementation of each module is not necessary for understanding this application. More precisely, considering the attributes, functions, and internal relationships of the various functional modules in the devices disclosed herein, the actual implementation of the module will be understood within the ordinary skills of an engineer. Therefore, those skilled in the art can implement this application as set forth in the claims without undue experimentation using ordinary skills. It can also be understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of this application, and the scope of this application is determined by the full scope of the appended claims and their equivalents.

Claims

1. A method for feeding a wound pole piece, characterized in that, Including: Detecting whether the next section of the pole piece is qualified; In response to the next section of the pole piece being a qualified section pole piece, performing trailing cut winding on the qualified section pole piece; In response to the next section of the pole piece being a defective section pole piece, performing single winding on the defective section pole piece; Among them, the step of performing single winding on the defective section pole piece includes: The sheet feeding component sends the head of the defective section pole piece to the sheet feeding-in component, and the sheet feeding-in component is located between the single winding component and the winding component; The sheet feeding component and the cutting component avoid the single winding component, and the sheet feeding component retreats by a compensation distance; The single winding component extends to the conveying route of the pole piece, and the single winding component winds the defective section pole piece; When single winding is completed, the sheet feeding component clamps the head of the qualified section pole piece, and the cutting component cuts off the tail of the defective section pole piece; The single winding component retracts, the cutting component avoids the sheet feeding component, and the sheet feeding component sends the head of the qualified section pole piece to the sheet feeding-in component; Among them, the distance between the sheet feeding component and the cutting component after the retreat compensation distance is L1, and the distance between the sheet feeding component and the sheet feeding-in component when sending out the qualified section pole piece is L2, and L1 is greater than L2.

2. The pole piece winding and feeding method according to claim 1, characterized in that, Among them, The step of performing trailing cut winding on the qualified section pole piece includes: The cutting component avoids the sheet feeding component, and the sheet feeding component sends the head of the qualified section pole piece to the sheet feeding-in component; The sheet feeding component retreats to the trailing clamp waiting position, and the cutting component retreats to the trailing cut waiting position; The sheet feeding-in component sends the head of the qualified section pole piece to the winding component, and the winding component winds the qualified section pole piece; When winding is completed, the sheet feeding component and the cutting component follow the pole piece at the moving speed of the pole piece; When the speeds of the sheet feeding component, the cutting component and the pole piece are synchronized, the sheet feeding component clamps the next section of the pole piece, and the cutting component cuts off the pole piece.

3. The method for feeding a wound pole piece according to claim 2, characterized in that: During the process of the sheet feeding component retreating by the compensation distance, the sheet feeding component retreats to the trailing clamp waiting position, and during the process of the cutting component avoiding the single winding component, the cutting component retreats to the trailing cut waiting position.

4. The method for feeding a wound pole piece according to claim 3, wherein Before the sheet feeding component and the cutting component avoid the single winding component in the pole piece winding and feeding method, it further includes: the normally open component located at the trailing clamp waiting position avoids the sheet feeding component; after the sheet feeding component sends the head of the qualified section pole piece to the sheet feeding-in component in the pole piece winding and feeding method, it further includes: the normally open component resets.

5. The method for feeding a wound electrode sheet according to claim 2, characterized in that: During the process of the cutting component avoiding the sheet feeding component, the cutting component moves to the trailing cut termination position.

6. A winding device, the winding device at least includes a sheet feeding component, a cutting component, a single winding component, a sheet feeding-in component and a winding component arranged in sequence along the conveying route of the pole piece, the sheet feeding component and the cutting component can move along the conveying route, with the conveying route defining a reference plane, the single winding component can approach or move away from the reference plane, and the winding device is used to implement the pole piece winding and feeding method according to any one of claims 1 to 5.

7. The winding device according to claim 6, characterized in that: The winding device includes a normally open component, which is arranged at the chasing and clamping waiting position. The normally open component includes a driver and a limit plate, and the driver can drive the limit plate to approach or move away from the sheet feeding component.

8. The winding device according to claim 7, characterized in that: The sheet feeding component includes a first clamping portion and a second clamping portion. The first clamping portion is provided with a first rolling body. The limit plate includes a limiting surface, and the limiting surface contacts the first rolling body to limit the first clamping portion.

9. The winding device according to claim 7, characterized in that: The normally open component includes a connecting plate, which is installed at the output end of the driver. The driver can drive the connecting plate to move in a direction parallel to the conveying route. The connecting plate is provided with a second rolling body, and the limit plate is provided with a connecting groove inclined in the direction of the conveying route, and the second rolling body is embedded in the connecting groove.

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