A positive and negative electrode sheet pair pasting device and method

Abstract

The application discloses a kind of positive and negative electrode sheet of battery core and method are pasted to each other.Electricity core positive and negative electrode sheet pasting equipment includes frame, first roller body, second roller body, adsorption device, feeding device and driving device, first roller body and second roller body are arranged on frame, and roller core is arranged on the same plane, adsorption device is arranged on first roller body and second roller body, feeding device is used to transport positive and negative electrode sheet close to first roller body or second roller body, and driving device is used to drive first roller body and second roller body;According to the electricity core positive and negative electrode sheet pasting equipment of the application, electricity core positive and negative electrode sheet pasting equipment is simple in structure, and can efficiently paste positive and negative electrode sheet.According to the electricity core positive and negative electrode sheet pasting method of the application, feeding, transfer, pasting, removal these four steps are carried out simultaneously, and the efficiency of positive and negative electrode sheet pasting is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery, and particularly to a positive and negative electrode sheet pasting device and method. BACKGROUND

[0002] There are many kinds of cell forming processes, one of which requires pasting of positive and negative electrode sheets. The quality of the pasting method of the positive and negative electrode sheets is related to the efficiency of the subsequent cell forming. A current pasting method of the positive and negative electrode sheets is to use a mechanical hand to grab the electrode sheets, and then paste the electrode sheets on both sides of the separator film respectively. However, the mechanical hand moves slowly, and the action of the mechanical hand in reciprocating movement to take the electrode sheets takes a lot of time, and the space for improving the material grabbing efficiency is limited, so the overall efficiency of the pasting of the positive and negative electrode sheets is low. SUMMARY

[0003] The present application aims to solve one of the technical problems in the prior art. To this end, the present application provides a positive and negative electrode sheet pasting device, which has a simple structure and can efficiently paste positive and negative electrode sheets.

[0004] The present application also provides a method for pasting the positive and negative electrode sheets.

[0005] According to the positive and negative electrode sheet pasting device of the first aspect of the present application, the device comprises a rack, a first roller body provided on the rack, a second roller body provided on the rack, wherein the roller centers of the first roller body and the second roller body are arranged on the same plane, a feeding device provided on the rack, wherein the feeding device is provided with a plurality of feeding devices, and the feeding device is used to transport the positive electrode sheet or the negative electrode sheet to be close to the first roller body or the second roller body, a suction device provided on the first roller body and the second roller body, and a driving device used to drive the first roller body and the second roller body.

[0006] According to the positive and negative electrode sheet pasting device of the present application, the following technical effects are achieved: the separator film is arranged between the first roller body and the second roller body, the positive electrode sheet and the negative electrode sheet are transported by the feeding device to be close to the first roller body or the second roller body, the first roller body or the second roller body adsorbs the positive electrode sheet or the negative electrode sheet close to it under the action of the suction device, and the first roller body or the second roller body drives the positive electrode sheet or the negative electrode sheet to rotate together under the driving of the driving device. When the positive electrode sheet or the negative electrode sheet moves to the space between the two rollers with the first roller body or the second roller body, the positive electrode sheet or the negative electrode sheet is arranged on the separator film to complete the pasting of the positive and negative electrode sheets.

[0007] According to some embodiments of the present application, the first roller body and the second roller body are movably arranged on the rack, and a control device is arranged to adjust the distance and pressure between the first roller body and the second roller body.

[0008] According to some embodiments of the present application, the first roller body and the second roller body are of the same size.

[0009] According to some embodiments of the present application, the first roller body and the second roller body are of different sizes.

[0010] According to some embodiments of the present application, a positioning device is further included for positioning the pole piece close to the first roller body or the second roller body.

[0011] According to some embodiments of the present application, the positioning device includes a stopper and a correction platform, the correction platform is provided with a plurality of correction bodies, the correction bodies are arranged at an angle to the conveying direction of the feeding device, and the stopper is arranged at the edge of the positioning device.

[0012] According to some embodiments of the present application, a traction device is further included, which is arranged on the rack and used to lead the isolation film out of the first roller body and the second roller body.

[0013] According to some embodiments of the present application, the feeding device is a conveyor belt.

[0014] According to the method for pasting positive and negative pole pieces of the second aspect of the embodiments of the present application, the following steps are included: conveying the positive and negative pole pieces by the feeding device, so that the negative and positive pole pieces are close to the first roller body and the second roller body respectively; rotating the first roller body while sucking the negative pole piece close to it, and rotating the second roller body while sucking the positive pole piece close to it; the first roller body and the second roller body drive the negative and positive pole pieces to rotate, and press and paste the negative and positive pole pieces on both sides of the isolation film between the two rollers respectively; and the traction device leads the isolation film with the pole piece group pasted thereon out of the two rollers.

[0015] According to the method for pasting positive and negative pole pieces of the embodiments of the present application, at least the following technical effects are achieved: the positive or negative pole piece is continuously close to the first roller body or the second roller body under the conveying of the feeding device, the first roller body and the second roller body continuously adsorb, transfer and press paste the positive and negative pole pieces on the isolation film between the two roller bodies, the traction device continuously leads the isolation film with the positive and negative pole pieces pasted thereon out of the two roller bodies, and the whole positive and negative pole pasting process can be efficiently carried out.

[0016] According to some embodiments of the present application, before the steps of "rotating the first roller body while sucking the negative pole piece close to it, and rotating the second roller body while sucking the positive pole piece close to it", the following steps are further included: the feeding device sends the negative and positive pole pieces to the positioning device respectively; after the negative and positive pole pieces are conveyed to the positioning device, they are driven by the correction bodies to move obliquely and contact the stopper at the edge of the positioning device to complete the positioning.

[0017] Additional aspects and advantages of the present application will be partially apparent and partially described in the following description, which will fully be apparent upon examination of the following figures and details. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a structural schematic diagram of a positive and negative electrode sheet pair pasting device according to an embodiment of the present application;

[0020] Figure 2 is a top view of a positive and negative electrode sheet pair pasting device according to an embodiment of the present application;

[0021] Figure 3 is a structural schematic diagram of another positive and negative electrode sheet pair pasting device according to an embodiment of the present application;

[0022] Figure 4 is a structural schematic diagram of a positioning device according to an embodiment of the present application;

[0023] Figure 5 is a structural schematic diagram of another positioning device according to an embodiment of the present application;

[0024] Figure 6 is a structural schematic diagram of a separator film provided with positive and negative electrode sheets according to an embodiment of the present application.

[0025] REFERENCE NUMERALS

[0026] The first roller body 110, the second roller body 120, the conveying belt 200, the driving device 300, the control device 400, the positioning device 500, the correcting platform 510, the correcting body 511, the first stop block 520, the second stop block 530, the traction device 600, the separator film 710, the positive electrode sheet 720, the negative electrode sheet 730. DETAILED DESCRIPTION

[0027] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are only for the purpose of explaining the present application, and cannot be understood as limiting the present application.

[0028] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by the upper, lower, front, rear, left, right and the like, is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0029] In the description of the present application, if the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0030] In the description of the present application, unless otherwise explicitly limited, the words such as arrangement, installation, connection and the like should be broadly understood, and the person 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 scheme.

[0031] The following refers to Figures 1 to 6 The positive and negative electrode sheet pasting equipment according to the embodiment of the present application is described.

[0032] For example, as shown in Figure 1 and Figure 2 The positive and negative electrode sheet pasting equipment according to the embodiment of the present application comprises: a rack; a first roller body 110, the first roller body 110 being arranged on the rack; a second roller body 120, the second roller body 120 being arranged on the rack, and the roller cores of the first roller body 110 and the second roller body 120 being arranged on the same plane; a feeding device, the feeding device being arranged on the rack, and the feeding device being arranged in plurality, the feeding device being used for conveying the positive electrode sheet 720 or the negative electrode sheet 730 to be close to the first roller body 110 or the second roller body 120 respectively; a suction device, the suction device being arranged on the first roller body 110 and the second roller body 120; and a driving device 300, the driving device 300 being used for driving the first roller body 110 and the second roller body 120.

[0033] As shown in Figure 1 and Figure 2As shown, the first roller body 110 and the second roller body 120 are arranged on the frame, the roller cores of the first roller body 110 and the second roller body 120 are arranged on the same horizontal plane, and the distance between the first roller body 110 and the second roller body 120 is small, only leaving a gap for the positive electrode sheet 720, the negative electrode sheet 730 and the separator film 710 to pass through. A feeding device is arranged below each of the first roller body 110 and the second roller body 120, and the end of each feeding device along the conveying direction coincides with the projection of the first roller body 110 or the second roller body 120 in the vertical direction, respectively. The feeding device can be a conveyor belt 200 or a transmission roller, but is not limited to one of them. The driving device 300 is used to drive the first roller body 110 and the second roller body 120 to rotate, and the rotation directions of the first roller body 110 and the second roller body 120 are as shown in the figure. It is worth noting that the rotation directions of the first roller body 110 and the second roller body 120 are not limited to the directions shown in the figure, and the user can set the rotation directions of the first roller body 110 and the second roller body 120 according to the actual feeding direction. The method for driving the first roller body 110 and the second roller body 120 by the driving device 300 can be single-drive control, double-drive synchronous control or double-drive asynchronous control. In synchronous control, the rotation speeds of the first roller body 110 and the second roller body 120 are the same. In asynchronous control, the rotation speeds of the first roller body 110 and the second roller body 120 can be the same or different. By arranging the adsorption device on the first roller body 110 and the second roller body 120, the first roller body 110 and the second roller body 120 will adsorb the positive electrode sheet 720 or the negative electrode sheet 730 conveyed below them when rotating. The method for the first roller body 110 and the second roller body 120 to adsorb the electrode sheet can be negative pressure adsorption or electrostatic adsorption, but is not limited to one of them. When the adsorption method is negative pressure adsorption, a plurality of micro holes are formed on the first roller body 110 and the second roller body 120, and a vacuum pump is arranged on the roller body. The work of the vacuum pump makes the internal air pressure of the roller body less than the external air pressure. When the electrode sheet moves directly below the roller body, it will be adsorbed by the holes on the roller body and move with the roller body. When the adsorption method is electrostatic adsorption, the first roller body 110 and the second roller body 120 are made of insulating materials, and static electricity is generated on the surface of the first roller body 110 and the second roller body 120 before use. When the electrode sheet moves directly below the roller body, it will be adsorbed on the surface of the first roller body 110 or the second roller body 120 under the action of static electricity.

[0034] According to the embodiment of the present invention, the battery cell positive and negative electrode sheet bonding equipment can efficiently bond positive and negative electrode sheets. Specifically, the separator 710 is disposed between the first roller 110 and the second roller 120. The feeding device delivers the positive electrode sheet 720 to the bottom of the second roller 120 and the negative electrode sheet 730 to the bottom of the first roller 110. The first roller 110 and the second roller 120 adsorb the positive electrode sheet 720 or the negative electrode sheet 730 located directly below them under the action of the adsorption device, and drive the positive electrode sheet 720 or the negative electrode sheet 730 to rotate together under the drive of the driving device 300. When the positive electrode sheet 720 or the negative electrode sheet 730 moves between the two rollers with the rollers, the positive electrode sheet 720 or the negative electrode sheet 730 will be pressed onto the separator 710 between the two rollers to complete the bonding of the positive and negative electrode sheets. The fixing methods between the positive and negative electrode sheets and the separator 710 include four types: adhesive, electrostatic, molecular exchange, and degassing, but are not limited to any one of these four. Specifically, when the fixing method between the positive and negative electrode sheets and the separator 710 is adhesive fixing, adhesive is pre-applied to both sides of the separator 710. When the positive electrode sheet 720 or the negative electrode sheet 730 reaches between the two rollers as the rollers rotate, the positive electrode sheet 720 or the negative electrode sheet 730 is pressed onto both sides of the separator 710, thus completing the connection between the positive and negative electrode sheets and the separator 710. After the bonding is completed, the user removes the portion of the separator 710 with the positive and negative electrode sheets attached from between the two rollers, and the first roller 110 or the second roller 120 can then continue to set the positive electrode sheet 720 or the negative electrode sheet 730 onto the separator 710. The first roller 110, the second roller 120, and the feeding device operate continuously, and the transfer and bonding of the positive and negative electrode sheets are carried out simultaneously, efficiently completing the bonding of the positive and negative electrode sheets.

[0035] In some specific embodiments of the present invention, a control device 400 is also included. The first roller 110 and the second roller 120 are movably mounted on the frame. The control device 400 is used to adjust the distance and pressure between the first roller 110 and the second roller 120. For example, as... Figure 2 As shown, the first roller 110 and the second roller 120 are movably mounted on the frame, and the control device 400 is located on both sides of the first roller 110 and the second roller 120. When it is necessary to align positive and negative electrode sheets of different specifications in actual production, the user can adjust the distance and pressure between the two rollers through the control device 400 to ensure the smooth alignment process of the positive and negative electrode sheets.

[0036] In some specific embodiments of the present invention, the first roller 110 and the second roller 120 are of the same size. For example, as... Figure 1 As shown, the roller centers of the first roller 110 and the second roller 120 are arranged on the same horizontal plane, and the diameters of the first roller 110 and the second roller 120 are the same. With the above arrangement, the first roller 110 and the second roller 120 can stably place positive and negative electrode sheets of similar size on both sides of the separator 710.

[0037] In some embodiments of the present application, the first roller body 110 and the second roller body 120 are different in size. For example, as shown in FIG. 1, the roller cores of the first roller body 110 and the second roller body 120 are arranged on the same horizontal plane, and the diameter of the first roller body 110 is greater than that of the second roller body 120. When the positive and negative electrode sheets of a large size difference need to be pasted in actual production, using roller bodies of the same size to adsorb and transfer the positive and negative electrode sheets may cause the roller bodies to fail to normally adsorb the electrode sheets, or the position of the electrode sheets to be offset when the electrode sheets are pasted on the separator 710 by the roller bodies, resulting in a skewed paste. In order to ensure that the roller bodies can normally adsorb the electrode sheets and prevent the electrode sheets from being skewed, the sizes of the first roller body 110 and the second roller body 120 need to be selected according to the actual size of the electrode sheets in actual production. Figure 3

[0038] In some embodiments of the present application, a positioning device 500 is further included, and the positioning device 500 is used to position the electrode sheet close to the first roller body 110 or the second roller body 120. For example, as shown in FIG. 2 and FIG. 3, two positioning devices 500 are arranged at the ends of the two feeding devices along the conveying direction, and are directly below the first roller body 110 and the second roller body 120. By arranging the positioning device 500 in the positive and negative electrode sheet pasting device, the positioning device 500 will first correct the position of the electrode sheet before the electrode sheet is adsorbed by the first roller body 110 or the second roller body 120, effectively improving the position accuracy of the positive and negative electrode sheets of the battery cell and improving the production quality of the electrode sheet raw material of the battery cell. The positioning device 500 can be a mechanical hand positioning mechanism, a friction roller positioning mechanism, a friction wheel positioning mechanism, an air floating positioning mechanism or a CCD visual detection positioning mechanism, but is not limited to one of the five. Figure 1 Figure 3

[0039] In some embodiments of the present application, the positioning device 500 includes a stop block and a correction platform 510, and the correction platform 510 is provided with a plurality of correction bodies 511, and the correction bodies 511 are arranged at an angle to the conveying direction of the feeding device. The stop block is arranged at the edge of the positioning device 500. For example, as shown in FIG. 4 and FIG. 5, the stop block is arranged at the edge of the positioning device 500, and the correction platform 510 is arranged in the middle of the positioning device 500. The correction platform 510 is provided with a plurality of correction bodies 511, and the correction bodies 511 are arranged at an angle to the conveying direction of the feeding device. Figure 4 Figure 5 ​​​​As shown, one end of the positive and negative electrode sheet is provided with a tab, and the inclination direction of the correction body 511 depends on the direction of the tab: when the positive and negative electrode sheets are attached to the separator film 710, the tabs are arranged at the same end, the inclination direction of the correction body 511 is opposite; when the positive and negative electrode sheets are attached to the separator film 710, the tabs are arranged at different ends, the inclination direction of the correction body 511 is the same. The inclined movement of the electrode sheet on the correction body 511 can be orthogonally decomposed into two movements pointing to a pair of adjacent sides of the positioning device 500 and perpendicular to each other, and the two adjacent sides pointed by the orthogonally decomposed movements of the positioning device 500 are respectively provided with the first stop block 520 and the second stop block 530. After the electrode sheet is transported onto the correction platform 510, it will be driven by the correction body 511 to approach the first stop block 520 and the second stop block 530. When the electrode sheet contacts the first stop block 520 and the second stop block 530, the positioning in the positioning device 500 is completed. The angle of the correction body 511 is greater than 0° and less than 90°, so that the electrode sheet can be moved obliquely under the transport action of the correction body 511.

[0040] In some embodiments of the present application, a traction device 600 is further included, which is arranged on the rack and is used to lead the separator film 710 out of the first roller body 110 and the second roller body 120. For example, as shown in Figure 1 and Figure 3 The traction device 600 is arranged above the first roller body 110 and the second roller body 120, and one end of the separator film 710 is connected with the traction device 600. Under the traction of the traction device 600, the separator film 710 raw material can be continuously unwound and continuously pass between the first roller body 110 and the second roller body 120. By arranging the traction device 600 in the positive and negative electrode sheet pair attaching device, the user does not need to manually pull the separator film 710, and the first roller body 110, the second roller body 120, the feeding device and the traction device 600 can continuously press and attach the positive and negative electrode sheets on both sides of the separator film 710 and continuously pull out the separator film 710 with the positive and negative electrode sheets attached, effectively improving the efficiency of the positive and negative electrode sheet pair attaching.

[0041] In some embodiments of the present application, the feeding device is a conveyor belt 200. For example, as shown in Figures 1 to 5 The electrode sheet is transported by the conveyor belt 200 to the positioning device 500, the position is corrected on the positioning device 500, and then transferred to the two sides of the separator film 710 by the first roller body 110 or the second roller body 120. By arranging the conveyor belt 200 in the positive and negative electrode sheet pair attaching device, the electrode sheet can be quickly and accurately transported to the positioning device 500, effectively improving the efficiency of the positive and negative electrode sheet pair attaching.

[0042] According to the method for pasting positive and negative electrode sheets of the second aspect of the present application, the method comprises the following steps: feeding the positive electrode sheet 720 and the negative electrode sheet 730 by the feeding device, so that the negative electrode sheet 730 and the positive electrode sheet 720 are close to the first roller body 110 and the second roller body 120 respectively; rotating the first roller body 110 while sucking the negative electrode sheet 730 close to the first roller body 110, and rotating the second roller body 120 while sucking the positive electrode sheet 720 close to the second roller body 120; rotating the negative electrode sheet 730 and the positive electrode sheet 720 by the first roller body 110 and the second roller body 120 respectively, and pressing the negative electrode sheet 730 and the positive electrode sheet 720 on both sides of the separator film 710 between the two rollers respectively, and leading the separator film 710 with the electrode sheet group pasted out of the two rollers by the traction device 600.

[0043] Through the pasting method, the positive electrode sheet 720 and the negative electrode sheet 730 can be continuously pasted on both sides of the separator film 710 with a certain interval. Specifically, the feeding device, the first roller body 110, the second roller body 120 and the traction device 600 work continuously, the electrode sheet is sucked onto the roller body after being fed below the roller body, and rotates together with the roller body until being pressed on both sides of the separator film 710. The traction device 600 continuously leads the separator film 710, and when the separator film 710 is pasted with the positive electrode sheet 720 and the negative electrode sheet 730 on both sides respectively, the traction device 600 leads this part out of the two rollers, so that the next pair of positive and negative electrode sheets can be smoothly pasted on both sides of the separator film 710. Since the action of the roller body sucking the material, the rotation and the action of the roller body setting the electrode sheet on the separator film 710 are performed simultaneously, compared with the traditional method of taking the electrode sheet by the mechanical hand, the action of the mechanical hand taking the electrode sheet reciprocally is avoided, and the efficiency of pasting the positive and negative electrode sheets of the battery cell is effectively improved. The rotating mode of the first roller body 110 and the second roller body 120 can be continuous rotation or intermittent rotation.

[0044] According to the method for pasting positive and negative electrode sheets of the second aspect of the present application, before the step of "rotating the first roller body 110 while sucking the negative electrode sheet 730 close to the first roller body 110, and rotating the second roller body 120 while sucking the positive electrode sheet 720 close to the second roller body 120", the method further comprises the following steps: feeding the negative electrode sheet 730 and the positive electrode sheet 720 to the positioning device 500 by the feeding device respectively; after the negative electrode sheet 730 and the positive electrode sheet 720 are fed to the positioning device 500, moving obliquely under the drive of the correcting body 511, and contacting the stopper at the edge of the positioning device 500 to complete positioning.

[0045] By the above-mentioned pasting method, before the roll body adsorbs the pole piece, the positioning device 500 first corrects the position of the pole piece located thereon, and then the first roll body 110 or the second roll body 120 adsorbs and transfers the pole piece with the corrected position. The correction process is as follows: after the pole piece reaches the correction platform 510, it is driven by the correction body 511 to move obliquely, and when the pole piece simultaneously contacts the first stop block 520 and the second stop block 530 at the edge of the positioning device 500, the positioning is completed. By setting the correction process in the pasting method, the feeding accuracy of the positive and negative pole pieces can be ensured, and the positioning device 500 is arranged at the end of the feeding device, so that the correction and feeding are performed simultaneously, thereby improving the efficiency of the positive and negative pole pieces of the battery cell.

[0046] Reference will now be made to Figures 1 to 6 A battery cell positive and negative pole piece pasting device and method according to an embodiment of the present application will be described in detail with reference to a specific embodiment. It should be understood that the following description is only exemplary and is not a specific limitation of the invention.

[0047] As Figures 1 to 6 shown, the battery cell positive and negative pole piece pasting device comprises a rack, a first roll body 110, a second roll body 120, an adsorption device, a conveying belt 200, a driving device 300, a control device 400, a positioning device 500, and a traction device 600. The conveying belt 200 is provided with two conveying belts 200, and the two conveying belts 200 are oppositely arranged along the conveying direction thereof. The ends of each conveying belt 200 are respectively provided with a positioning device 500, and the positioning device 500 comprises a correction platform 510, a correction body 511, a first stop block 520, and a second stop block 530. The correction platform 510 is arranged at the end of the conveying direction of the conveying belt 200, and the correction platform 510 is provided with a plurality of correction bodies 511 inclined at a certain angle with respect to the conveying direction of the conveying belt 200. The first stop block 520 and the second stop block 530 are arranged at the edge of the positioning device 500. The first roll body 110 and the second roll body 120 are respectively arranged above the two positioning devices 500, and the roll centers thereof are located on the same horizontal plane. The first roll body 110 and the second roll body 120 are provided with the adsorption device. The control device 400 and the driving device 300 are arranged on one side of the first roll body 110 and the second roll body 120, wherein the control device 400 is used to control the distance and pressure between the two rolls, and the driving device 300 is used to drive the first roll body 110 and the second roll body 120 to rotate. The traction device 600 is arranged above the first roll body 110 and the second roll body 120, and is used to continuously pull the isolation film 710 through the two roll bodies.

[0048] When the positive and negative electrode sheets of the battery cell are attached by the positive and negative electrode sheet attaching device, the positive electrode sheet 720 and the negative electrode sheet 730 are arranged on the two feeding devices respectively, and the separator film 710 is connected to the traction device 600 through the first roller body 110 and the second roller body 120. Then the positive and negative electrode sheet attaching device is started, and the whole device starts to work. The conveyor belt 200 sends the positive electrode sheet 720 to the positioning device 500 below the second roller body 120, and sends the negative electrode sheet 730 to the positioning device 500 below the first roller body. When the electrode sheet reaches the correction platform 510, the correction body 511 drives the electrode sheet to be close to the first stop block 520 and the second stop block 530, and the positioning is completed when the electrode sheet contacts the first stop block 520 and the second stop block 530. The first roller body 110 and the second roller body 120 rotate, and the first roller body 110 adsorbs the positioned negative electrode sheet 730 while rotating, and the second roller body 120 adsorbs the positioned positive electrode sheet 720 while rotating. The positive electrode sheet 720 and the negative electrode sheet 730 are adsorbed to the roller bodies and rotate together with the roller bodies. When the positive electrode sheet 720 and the negative electrode sheet 730 rotate to the space between the two roller bodies, they are attached to the two sides of the separator film 710 and the attaching is completed. The part of the separator film 710 with the attached positive and negative electrode sheets is continuously separated from the two roller bodies under the action of the traction device 600, and the part of the separator film 710 without the attached positive and negative electrode sheets enters the space between the two roller bodies, so as to prepare for the next attaching of the positive and negative electrode sheets.

[0049] According to the positive and negative electrode sheet attaching device of the battery cell, the above effects can be achieved. During the whole attaching process, the feeding, correction, adsorption, attaching and moving out are performed synchronously. Compared with the traditional method of taking the electrode sheet by the mechanical hand, the time of reciprocating movement of the mechanical hand is saved, and the positive and negative electrode sheets can be efficiently and accurately attached to the two sides of the separator film 710.

[0050] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means 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 the application. In the specification, the exemplary description of the above terms does not necessarily mean 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.

[0051] Although the embodiments of the application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. A device for bonding positive and negative electrode sheets of a battery cell, characterized in that, The application relates to a positive and negative electrode sheet pasting device for an electric cell, which comprises the following parts: a rack; a first roller body (110) arranged on the rack; a second roller body (120) arranged on the rack, and the roller cores of the first roller body (110) and the second roller body (120) are arranged on the same plane; a feeding device arranged on the rack, the feeding device is arranged with a plurality of feeding devices, and the feeding device is used for conveying a positive electrode sheet (720) or a negative electrode sheet (730) to be close to the first roller body (110) or the second roller body (120) respectively; a suction device arranged on the first roller body (110) and the second roller body (120); a driving device (300) used for driving the first roller body (110) and the second roller body (120); a control device (400) used for adjusting the distance and pressure between the first roller body (110) and the second roller body (120), and the first roller body (110) and the second roller body (120) are movably arranged on the rack; a positioning device (500) used for positioning the electrode sheet close to the first roller body (110) or the second roller body (120), the positioning device (500) comprises a stopper and a correction platform (510), the correction platform (510) is provided with a plurality of correction bodies (511), the correction bodies (511) are arranged at an angle with the conveying direction of the feeding device, and the stopper is arranged at the edge of the positioning device (500).

2. The electrode sheet pasting device according to claim 1, wherein The first roller body (110) and the second roller body (120) are of the same size.

3. The electrode sheet pasting device according to claim 1, wherein The first roller body (110) and the second roller body (120) are of different sizes.

4. The electrode sheet pasting device according to claim 1, wherein The application further comprises a traction device (600) arranged on the rack, and the traction device (600) is used for leading the isolation film (710) out of the first roller body (110) and the second roller body (120).

5. The electrode tabbing apparatus of claim 1, wherein, The feeding device is a conveying belt (200).

6. A method for positive and negative electrode sheet pair pasting of an electric core, characterized by, The application is applied to the positive and negative electrode sheet pasting device for an electric cell as claimed in any one of claims 1 to 5, and comprises the following steps: the positive electrode sheet (720) and the negative electrode sheet (730) are conveyed by the feeding device, so that the negative electrode sheet (730) and the positive electrode sheet (720) are close to the first roller body (110) and the second roller body (120) respectively; the first roller body (110) rotates while sucking the negative electrode sheet (730) close thereto, and the second roller body (120) rotates while sucking the positive electrode sheet (720) close thereto; the first roller body (110) and the second roller body (120) drive the negative electrode sheet (730) and the positive electrode sheet (720) to rotate respectively, and the negative electrode sheet (730) and the positive electrode sheet (720) are pressed and pasted on the two sides of the isolation film (710) between the two rollers respectively, and the traction device (600) leads the isolation film (710) pasted with the electrode sheet group out of the two rollers.

7. The method of claim 6, wherein the method is characterized by, The step of "the first roller body (110) rotates while sucking the negative electrode sheet (730) close to it, and the second roller body (120) rotates while sucking the positive electrode sheet (720) close to it" further comprises the following steps: The feeding device respectively sends the negative electrode sheet (730) and the positive electrode sheet (720) to the positioning device (500); After the negative electrode sheet (730) and the positive electrode sheet (720) are transported to the positioning device (500), they are driven by the correction body (511) to move obliquely and contact the stopper at the edge of the positioning device (500) to complete positioning.

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