A lithium battery cell forming apparatus and method

Abstract

The application discloses a lithium battery cell forming equipment and method. The lithium battery cell forming equipment comprises a rack, a pasting device, a suction device, first feeding devices, a laminating device, a second feeding device and a pulling device. The pasting device comprises a first roller body, a second roller body and a first driving device. The suction device is arranged on the roller body. The ends of the two first feeding devices in the feeding direction correspond to the first roller body and the second roller body respectively. The laminating device comprises a receiving cavity. The second feeding device is arranged above the pasting device, and the end of the feeding direction is opposite to the receiving cavity. The pulling device is arranged between the second feeding device and the laminating device. According to the lithium battery cell forming equipment, the equipment structure is simple, and the lithium battery cell can be efficiently formed. According to the lithium battery cell forming method, the steps in the method are carried out at the same time, and the lithium battery cell can be efficiently formed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery, and particularly to a lithium battery cell forming device and method. BACKGROUND

[0002] Based on the development trend of lithium battery, the cell forming process plays an important role. The positive sheet, the isolation film and the negative sheet are alternately stacked together to complete the forming of the lithium battery cell. At present, the cell forming method is mainly divided into two types of winding type and stacking type. In the stacking type forming process, the mechanical hand is generally used to grab the positive and negative sheets and the isolation film, and then the positive sheet, the isolation film, the negative sheet and the isolation film are alternately stacked together in this order to complete the stacking of the cell. However, this forming method has low efficiency, and the reciprocating movement of the mechanical hand for feeding and the correction of the position of the sheet need a certain time, and the mechanical hand may cause the sheet to drop powder or be damaged when grabbing the sheet, which affects the quality of the product after forming. SUMMARY

[0003] The present application aims to solve one of the technical problems existing in the prior art. To this end, the present application provides a lithium battery cell forming device, which has a simple structure and can efficiently and stably form a lithium battery cell.

[0004] The present application also provides a lithium battery cell forming method.

[0005] According to the lithium battery cell forming device of the first aspect of the present application, the device comprises a rack, a lamination device, a suction device, a first feeding device, a stacking device and a pulling device. The lamination device comprises a first roller body, a second roller body and a first driving device. The first roller body and the second roller body are arranged on the rack and have their roller centers arranged on the same plane. The first driving device is drivingly connected with the first roller body and the second roller body. The suction device is arranged on the first roller body and the second roller body. The first feeding device is arranged to transport the positive sheet or the negative sheet close to the first roller body or the second roller body. The stacking device comprises a receiving cavity for stacking and receiving the completed cell. The second feeding device is arranged to guide the cell stacking raw material out of the first roller body and the second roller body and transport the cell stacking raw material to the stacking device. The end of the second feeding device is opposite to the top of the receiving cavity. The pulling device is arranged on the rack and between the stacking device and the second feeding device.

[0006] The lithium battery cell forming device has at least the following technical effects: the positive plate and the negative plate are respectively close to the first roller body and the second roller body under the conveying of the different first feeding devices, then the first roller body and the second roller body adsorb and transfer the positive plate or the negative plate close to the first roller body and the second roller body to the separator between the two rollers to form a cell stack raw material, the second feeding device feeds out the cell stack raw material above the receiving cavity while guiding the cell stack raw material out of the two rollers, after the cell stack raw material is fed out, the pulling device grabs the first end of the cell stack raw material, the second feeding device continues to feed, the part of the cell stack raw material with the plate is fed out and then enters the receiving cavity, and the part of the cell stack raw material with the separator is pressed below, at this time, the pulling device is released, the part of the cell stack raw material with the plate stacks the part of the cell stack raw material with the separator below, the first layer of the lithium battery cell is completed, the first feeding device continues to feed, the part of the cell stack raw material with the plate and the part of the cell stack raw material with the separator are alternately fed out and automatically completed to stack when entering the receiving cavity, and the cell stack raw material is stacked for several layers, and then the stacking of a group of lithium battery cells is completed. In the lithium battery cell forming device, the conveying, transferring and attaching of the plate and the conveying and stacking of the cell stack raw material are simultaneously performed, so that the lithium battery cell can be efficiently and stably formed.

[0007] According to some embodiments of the present application, the positioning device is arranged to position the plate close to the first roller body or the second roller body.

[0008] According to some embodiments of the present application, the control device is arranged to adjust the distance and the pressure between the first roller body and the second roller body.

[0009] According to some embodiments of the present application, the bottom surface of the receiving cavity forms an angle a with the horizontal plane, and the second feeding device comprises a feeding platform, and the feeding platform forms an angle b with the bottom surface of the receiving cavity.

[0010] According to some embodiments of the present application, the stacking device comprises a first baffle, a second baffle, a receiving plate, a second driving device and a third driving device, the receiving plate is arranged between the first baffle and the second baffle and surrounded by the first baffle and the second baffle to form the receiving cavity, the second driving device is drivingly connected with the receiving plate, and the third driving device is drivingly connected with the second baffle.

[0011] According to some embodiments of the present application, the air knife is arranged on the rack.

[0012] According to some embodiments of the present application, a cutting device is further included and arranged on the frame.

[0013] According to the method for forming a lithium battery cell according to the second aspect of the embodiments of the present application, the steps include: feeding the positive electrode sheet and the negative electrode sheet by the first feeding device, so that the negative electrode sheet and the positive electrode sheet are close to the first roller body and the second roller body respectively; rotating the first roller body while sucking the negative electrode sheet close to the first roller body, and rotating the second roller body while sucking the positive electrode sheet close to the second roller body; rotating the negative electrode sheet and the positive electrode sheet by the first roller body and the second roller body respectively, and pressing the negative electrode sheet and the positive electrode sheet on both sides of the isolation film between the two rollers to form an electrode stack raw material, and guiding the electrode stack raw material out of the two rollers by the second feeding device; and feeding the electrode stack raw material into the stacking device by the second feeding device to complete the stacking.

[0014] According to the method for forming a lithium battery cell according to the embodiments of the present application, the following technical effects are achieved: the feeding of the positive electrode sheet and the negative electrode sheet, the positioning of the positive electrode sheet and the negative electrode sheet, the pressing of the positive electrode sheet and the negative electrode sheet, the feeding of the electrode stack raw material, and the stacking of the electrode stack raw material are simultaneously performed, and the user only needs to pre-set the positive electrode sheet, the negative electrode sheet, and the isolation film in the lithium battery cell forming device, and the formation of the lithium battery cell is continuously performed, and the production efficiency is higher than that of the traditional method for forming a lithium battery cell.

[0015] According to some embodiments of the present application, before the step of "rotating the first roller body while sucking the negative electrode sheet close to the first roller body, and rotating the second roller body while sucking the positive electrode sheet close to the second roller body", the following steps are further included: feeding the negative electrode sheet and the positive electrode sheet to the positioning device by the first feeding device respectively; and after the negative electrode sheet and the positive electrode sheet are fed to the positioning device, moving obliquely under the driving of the correcting body, and contacting the stopper at the edge of the positioning device to complete the positioning.

[0016] According to some embodiments of the present application, the second feeding device feeds the cell lamination raw material into the lamination device, including the following steps: the second feeding device feeds the cell lamination raw material above the lamination device; the pulling device grabs the head of the fed cell lamination raw material, and drives it to move to the front of the lamination device, the head of the cell lamination raw material being the part of the isolation film in the cell lamination raw material; the second feeding device continues to feed, and the part of the cell lamination raw material with the pole piece is fed and falls into the lamination device, the pulling device releases the head of the cell lamination raw material, and the part of the cell lamination raw material with the pole piece pulls the part of the isolation film in the cell lamination raw material flat and stacks above the part of the isolation film in the cell lamination raw material; the second feeding device continues to feed, and the part of the isolation film in the cell lamination raw material and the part of the cell lamination raw material with the pole piece are alternately fed, and the part of the isolation film in the cell lamination raw material previously fed is pulled flat and stacked above the part of the isolation film in the cell lamination raw material; the second feeding device continues to feed until the lamination of a group of cells is completed.

[0017] According to some embodiments of the present application, the second feeding device feeds the cell lamination raw material above the lamination device, including: the second feeding device is inclinedly arranged and feeds the cell lamination raw material above the inclinedly arranged lamination device at a certain angle.

[0018] Additional aspects and advantages of the present application will be given in part in the following description, some will become apparent from the following description, or will be understood by those skilled in the art through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description given below, combined with the accompanying drawings, in which:

[0020] Figure 1 is a structural schematic diagram of a lithium battery cell forming equipment according to an embodiment of the present application;

[0021] Figure 2 is a top view of a pasting device according to an embodiment of the present application;

[0022] Figure 3 is a structural schematic diagram of a positioning device according to an embodiment of the present application;

[0023] Figure 4 is a structural schematic diagram of another positioning device according to an embodiment of the present application;

[0024] Figure 5 is a structural schematic diagram of a pulling device of a lithium battery cell forming equipment according to an embodiment of the present application when working;

[0025] Figure 6is a structure schematic diagram of a first layer of laminated sheets when the lithium battery cell forming equipment according to the embodiment of the present application is in operation;

[0026] Figure 7 is a structure schematic diagram of the air knife of the lithium battery cell forming equipment according to the embodiment of the present application when in operation;

[0027] Figure 8 is a structure schematic diagram of a last layer of laminated sheets when the lithium battery cell forming equipment according to the embodiment of the present application is in operation;

[0028] Figure 9 is a structure schematic diagram of the material taking device and the cutting device of the lithium battery cell forming equipment according to the embodiment of the present application when in operation;

[0029] Figure 10 is a structure schematic diagram of the smoothing device of the lithium battery cell forming equipment according to the embodiment of the present application when in operation;

[0030] Figure 11 is a structure schematic diagram of the cell laminated sheet raw material according to the embodiment of the present application;

[0031] Figure 12 is a structure schematic diagram of the lithium battery cell laminated sheet according to the embodiment of the present application.

[0032] Reference signs:

[0033] The device 100, the first roller body 110, the second roller body 120, the first driving device 130, the control device 140, the first feeding device 200, the positioning device 300, the first stop block 310, the second stop block 320, the correction platform 330, the correction body 331, the laminated sheet device 400, the first baffle 410, the second baffle 420, the material collecting plate 430, the second driving device 440, the third driving device 450, the second feeding device 500, the pulling device 600, the air knife 700, the material taking device 810, the smoothing device 820, the cutting device 900, the lithium battery cell laminated sheet 1000, the separator film 1010, the positive electrode sheet 1020, and the negative electrode sheet 1030. DETAILED DESCRIPTION

[0034] 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 signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0035] 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 purpose of facilitating the description of 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.

[0036] In the description of the present application, if the first, second is described for the purpose of distinguishing technical features, it cannot be understood as indicating or implying the relative importance of the technical features indicated or implying the number of technical features indicated or implying the sequence of technical features indicated.

[0037] 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.

[0038] The following refers to Figures 1 to 12 The present application discloses a lithium battery cell forming device.

[0039] For example, as Figure 1 and Figure 2 shown, the lithium battery cell forming device according to the embodiment of the present application comprises a rack, a pasting device 100, the pasting device 100 comprising a first roller body 110, a second roller body 120 and a first driving device 130, the first roller body 110 and the second roller body 120 are both arranged on the rack and the roller cores are arranged on the same plane, the first driving device 130 is drivingly connected with the first roller body 110 and the second roller body 120, a suction device, the suction device being arranged on the first roller body 110 and the second roller body 120, a first feeding device 200, the first feeding device 200 being provided with a plurality of first feeding devices 200, the first feeding device 200 being used for conveying the positive plate 1020 or the negative plate 1030 to be close to the first roller body 110 or the second roller body 120, a laminating device 400, the laminating device 400 comprising a receiving cavity, the receiving cavity being used for laminating and receiving the completed cell, a second feeding device 500, the second feeding device 500 being used for leading the cell laminating raw material out of the first roller body 110 and the second roller body 120, and conveying the cell laminating raw material to the laminating device 400, the end of the conveying direction of the second feeding device 500 being opposite to the top of the receiving cavity, a pulling device 600, the pulling device 600 being arranged on the rack, the pulling device 600 being arranged between the laminating device 400 and the second feeding device 500.

[0040] For example, as Figure 1 and Figure 2As shown, the lithium battery cell forming equipment comprises a rack, a pasting device 100, a suction device, a first feeding device 200, a laminating device 400, a second feeding device 500 and a pulling device 600. The pasting device 100, the first feeding device 200, the laminating device 400 and the second feeding device 500 are arranged on the rack. The pasting device 100 comprises a first roller body 110, a second roller body 120 and a first driving device 130. The roller cores of the first roller body 110 and the second roller body 120 are arranged on the same horizontal plane. The suction device is arranged on the first roller body 110 and the second roller body 120. The sizes of the first roller body 110 and the second roller body 120 are determined according to the sizes of the pole pieces to be transferred. Users can select the sizes of the first roller body 110 and the second roller body 120 according to actual production needs. The first roller body 110 and the second roller body 120 rotate under the action of the first driving device 130 and suck and drive the pole pieces to rotate together in the process of rotation. The first roller body 110 rotates counterclockwise and the second roller body 120 rotates clockwise. It is worth noting that the rotating directions of the first roller body 110 and the second roller body 120 are not limited to the directions shown in the figure. Users can set the rotating directions of the roller bodies according to the feeding directions in actual production. The driving mode of the first driving device 130 includes single motor driving, double motor synchronous driving and double motor asynchronous driving. Users can select the driving modes of the first roller body 110 and the second roller body 120 according to actual production needs. The suction device can be a negative pressure suction device or an electrostatic suction device, but is not limited to one of them. When the suction device is a negative pressure suction device, a plurality of small through 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 vacuum pump works to make the internal air pressure of the roller body less than the external air pressure. When the pole piece moves directly below the roller body, it will be sucked by the through holes on the roller body and move together with the roller body. When the suction device is an electrostatic suction device, the first roller body 110 and the second roller body 120 are made of insulating materials. Before use, the electrostatic suction device generates static electricity on the surface of the first roller body 110 and the second roller body 120. When the pole piece approaches the roller body, it will be attracted to the surface of the first roller body 110 or the second roller body 120 under the action of static electricity.The first roller body 110 and the second roller body 120 are closely arranged, only leaving a gap between the two rollers for the isolation film 1010, the positive electrode sheet 1020 and the negative electrode sheet 1030 to pass through; the first feeding device 200 is provided with two, and the ends of the conveying direction are respectively opposite to the lower sides of the first roller body 110 and the second roller body 120, and the positive electrode sheet 1020 and the negative electrode sheet 1030 are respectively moved to the lower sides of the first roller body 110 and the second roller body 120 under the conveying action of the two first feeding devices 200, and the first feeding device 200 can be a conveyor belt or a conveyor roller, but is not limited to one of the two; the second feeding device 500 is arranged above the first roller body 110 and the second roller body 120, and is used to lead out the formed battery core stack raw material from the device 100, and the end of the conveying direction of the second feeding device 500 is opposite to the upper side of the stacking device 400, and the second feeding device 500 can be a conveyor belt or a conveyor roller, but is not limited to one of the two; the stacking device 400 is arranged behind the device 100, the size of the receiving cavity in the stacking device 400 is matched with the size of the positive and negative electrode sheet group, and when the part of the battery core stack raw material with the electrode sheet is entered into the receiving cavity, the positioning is automatically completed; the pulling device 600 is arranged between the first feeding device 200 and the stacking device 400, and the battery core stack raw material is grabbed before and after the stacking, and the pulling device 600 can be in the form of electrostatic adsorption or vacuum adsorption, but is not limited to one of the two.

[0041] According to the lithium battery cell forming device, the process of forming the lithium battery cell is as follows: the lithium battery cell forming device is started, and each device in the lithium battery cell forming device starts to work, the user first passes the isolation film 1010 between the first roller body 110 and the second roller body 120 to connect the second feeding device 500, then respectively puts the positive plate 1020 and the negative plate 1030 into the two first feeding devices 200, and the positive plate 1020 and the negative plate 1030 reach the lower side of the first roller body 110 and the second roller body 120 under the conveying of the first feeding device 200, then the positive plate 1020 and the negative plate 1030 are respectively adsorbed by the first roller body 110 and the second roller body 120 under the action of the adsorption device, the first roller body 110 and the second roller body 120 drive the positive plate 1020 and the negative plate 1030 to rotate together, when the positive plate 1020 and the negative plate 1030 rotate with the roller body to the position between the two rollers, the isolation film 1010 is arranged to pass through the position between the two rollers, and the cell stack raw material is formed, the cell stack raw material after forming leaves the position between the two rollers under the traction of the second feeding device 500, when the second feeding device 500 sends out the first end of the cell stack raw material above the storage cavity, the pulling device 600 grabs the first end of the cell stack raw material, at this time, the second feeding device 500 continues to feed, the part of the cell stack raw material with the plate is sent out, the pulling device 600 is released, the part of the cell stack raw material with the plate pulls the part of the isolation film in the cell stack raw material and stacks below, the second feeding device 500 continues to feed, the part of the cell stack raw material with the plate and the part of the isolation film in the cell stack raw material are alternately sent out, and the stacking is automatically completed when entering the stack device 400, and the cell stack raw material is stacked for several layers to complete the stacking of the lithium battery cell. Since each process in the device is carried out at the same time, the forming efficiency of the lithium battery cell is greatly improved; and when the cell is stacked, the storage cavity also positions the plate group, effectively ensures the accuracy of the plate during pasting and stacking, and improves the product quality of the lithium battery cell.

[0042] In some embodiments of the application, a positioning device 300 is further included, which is used to position the plate close to the first roller body 110 or the second roller body 120. Figure 3 and Figure 4As shown, the positioning device 300 is provided with two, respectively arranged below the first roller body 110 and the second roller body 120, and the ends of the two first feeding devices 200 are respectively connected with the two positioning devices 300. After the pole piece is transported to the positioning device 300 by the first feeding device 200, the positioning is completed on the positioning device 300, and then the pole piece is adsorbed by the roller body. The positioning device 300 comprises a stop block and a correction platform 330, the correction platform 330 is provided with a plurality of correction bodies 331, the correction bodies 331 are arranged at an angle with the transport direction of the first feeding device 200, and the stop block is arranged at the edge of the positioning device 300. For example, as shown in Figure 4 and Figure 5 As shown, one end of the positive and negative pole piece is provided with a tab, and the inclination direction of the correction body 331 is determined according to the direction of the tab: when the positive and negative pole pieces are attached to the isolation film 1010, the tabs are arranged at the same end, the inclination direction of the correction body 331 is opposite; when the positive and negative pole pieces are attached to the isolation film 1010, the tabs are arranged at different ends, the inclination direction of the correction body 331 is the same. The oblique movement of the pole piece on the correction body 311 can be orthogonally decomposed into two movements perpendicular to each other and pointing to a pair of adjacent edges of the positioning device 300, and the two adjacent edges pointed by the orthogonally decomposed movements of the positioning device 300 are respectively provided with a first stop block 310 and a second stop block 320. After the pole piece is transported to the correction platform 330, it will move towards the first stop block 310 and the second stop block 320 under the drive of the correction body 331. When the pole piece contacts the first stop block 310 and the second stop block 320, the positioning in the positioning device 300 is completed. The angle of the correction body 331 is greater than 0° and less than 90°, so as to ensure that the pole piece can move obliquely under the transport action of the correction body 331. It is worth noting that the above is only one of the embodiments of the positioning device 300, and the positioning device 300 can also be a mechanical hand positioning mechanism, a friction roller type positioning mechanism, a friction wheel type positioning mechanism, an air floating type positioning mechanism or a CCD visual detection positioning mechanism, but is not limited to one of the five. By arranging the positioning device 300 in the lithium battery cell forming equipment, the pole piece is positioned by the positioning device 300 before being attached, only the pole piece with completed positioning can be adsorbed and transferred by the roller body for pressing and attaching, so as to ensure the position accuracy of the pole piece when being attached, and effectively improve the forming quality of the lithium battery cell.

[0043] In some specific embodiments of the present application, the attaching device 100 further comprises a control device 140, the first roller body 110 and the second roller body 120 are movably arranged on the rack, and the control device 140 is used for adjusting the distance and pressure between the first roller body 110 and the second roller body 120. For example, as shown in Figure 2As 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 140 to ensure the smooth alignment process of the positive and negative electrode sheets.

[0044] In some specific embodiments of the present invention, the bottom surface of the receiving cavity forms an angle α with the horizontal plane, and the second feeding device 500 includes a feeding platform, which forms an angle β with the bottom surface of the receiving cavity. For example, as Figure 1 As shown, when the second feeding device 500 and the stacking device 400 are horizontally arranged, the forming quality of the battery cell stack is relatively low. When the electrode group size is small, the portion of the battery cell stack material with the electrode attached may not be able to smoothly flatten the separator portion of the previously fed battery cell stack material when it is fed out. At this time, by tilting the second feeding device 500 and the stacking device 400 at a certain angle, the forming quality of the battery cell stack can be effectively improved. Specifically, the portion of the battery cell stack material with the electrode attached is first fed out at a certain angle, and after one end contacts the receiving cavity, it is deflected at a certain angle to complete one layer of stacking. Compared with the horizontally arranged second feeding device 500 and stacking device 400, the tilted second feeding device 500 and stacking device 400 require a smaller deflection angle during the feeding and stacking process of the battery cell stack material with the electrode attached, and the stacking process is more stable. When lithium battery forming and stacking equipment needs to stack cell stacking materials of different specifications, users can adjust the angles α and β to adapt to the production needs of different cell stacking materials.

[0045] In some specific embodiments of the present invention, the stacking device 400 includes a first baffle 410, a second baffle 420, a receiving plate 430, and a second driving device 440. The receiving plate 430 is disposed between the first baffle 410 and the second baffle 420, and the first baffle 410 and the second baffle 420 enclose each other to form a receiving cavity. The second driving device 440 is drivenly connected to the receiving plate 430. For example, Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the first baffle 410, the second baffle 420 and the receiving plate 430 are mutually enclosed to form a receiving cavity, and the size of the receiving cavity is matched with the size of the pole piece group. After the part of the raw material of the cell stack with the pole piece enters the receiving cavity from the feeding device, the first baffle 410 and the second baffle 420 will play a positioning role on this part, so that it will not be deviated in position in the receiving cavity. The second driving device 440 is a lead screw transmission mechanism, which includes a motor and a lead screw. The lead screw is connected with the receiving plate 430. When the motor drives the lead screw to rotate, the receiving plate 430 will rise or fall according to the direction of the rotation of the lead screw. It is worth noting that the lead screw transmission mechanism is only one of the embodiments of the second driving device 440, and the embodiment of the second driving device 440 is not limited to this. By setting the first baffle 410, the second baffle 420 and the receiving plate 430 in the stacking device 400, and making them mutually enclosed to form a receiving cavity matched with the size of the pole piece group, the part of the raw material of the cell stack with the pole piece can be positioned, so that it can be accurately stacked when it falls into the stacking device 400 each time, and a large positional deviation will not occur, thereby effectively improving the product quality of the cell stack finished product. By setting the second driving device 440 drivingly connected with the receiving plate 430 in the stacking device 400, the second driving device 440 will drive the receiving plate 430 to fall a stroke each time after stacking, so that the part of the raw material of the cell stack with the pole piece will be at the same height each time when it falls into the stacking device 400, thereby making the cell stacking process more stable.

[0046] In further embodiments of the present application, the stacking device 400 further comprises a third driving device 450 drivingly connected with the second baffle 420. For example, as shown in Figure 1 and Figure 9 The third driving device 450 is a pneumatic cylinder, and the second baffle 420 is connected with the output end of the pneumatic cylinder. Under the driving of the pneumatic cylinder, the second baffle 420 can make reciprocating motion up and down. It is worth noting that the pneumatic cylinder is only one of the embodiments of the third driving device 450, and the embodiment of the third driving device 450 is not limited to this. By setting the third driving device 450 drivingly connected with the second baffle 420 in the stacking device 400, when the cell stacking is completed, the third driving device 450 drives the second baffle 420 to fall, so that the user can easily take out the formed cell stack from the side of the stacking device 400. After the cell stack is taken out, the third driving device 450 drives the second baffle 420 to rise again, so that the lithium battery cell forming equipment can continue to stack the next cell.

[0047] In some specific embodiments of the present application, a wind knife 700 is further included, which is arranged on the rack, and the air outlet direction of the wind knife 700 points between the stacking device 400 and the second feeding device 500. For example, as shown in Figure 1 andFigure 7 As shown in the drawings, the air knife 700 is arranged between the second feeding device 500 and the laminating device 400, and is arranged opposite to the pulling device 600. When the second feeding device 500 has a high conveying speed and the battery cell forming speed is high, the part of the separator film in the battery cell laminating raw material may be stacked together during the process of being sent to the laminating device 400, thereby affecting the product quality. At this time, by arranging the air knife 700 in the lithium battery cell forming laminating equipment, the movement state of the part of the separator film in the battery cell laminating raw material can be controlled. Specifically, when the air knife 700 is working, the part of the separator film in the battery cell laminating raw material will be blown to the direction where the pulling assembly is arranged, and when the part of the battery cell laminating raw material with the pole piece is sent out, the part of the separator film in the battery cell laminating raw material will be flattened and laminated below. By arranging the air knife 700 in the lithium battery cell forming laminating equipment, the part of the separator film in the battery cell laminating raw material can be effectively prevented from being stacked during the laminating process, and the production quality of the product is improved.

[0048] In some embodiments of the present application, a material taking device 810 is further included, the material taking device 810 is arranged on the rack, and the material taking device 810 is used to grasp the completed lithium battery cell laminating sheet 1000. For example, as shown in Figure 1 and Figure 9 The material taking device 810 is arranged behind the second baffle 420, and the material taking device 810 can be a mechanical hand, but is not limited to this. When the second baffle 420 is lowered, the material taking device 810 can extend into the laminating device 400 to take out the lithium battery cell laminating sheet 1000. By arranging the material taking device 810 in the lithium battery cell forming equipment, the completed lithium battery cell laminating sheet 1000 can be quickly taken out by the material taking device 810 after the battery cell laminating, and the production efficiency of the lithium battery cell laminating sheet 1000 is effectively improved.

[0049] In some embodiments of the present application, a flattening device 820 is further included, the flattening device 820 is arranged on the rack, and the flattening device 820 is used to attach the excess separator film 1010 to the lithium battery cell laminating sheet 1000. For example, as shown in Figure 1 and Figure 10 The flattening device 820 is arranged below the material taking device 810. After the user separates the lithium battery cell laminating sheet 1000 from the battery cell laminating raw material, the flattening device 820 attaches the excess separator film 1010 to the surface of the lithium battery cell laminating sheet 1000, and the production efficiency and production quality of the lithium battery cell laminating sheet 1000 are effectively improved.

[0050] In some embodiments of the present application, a cutting device 900 is further included, the cutting device 900 is arranged on the rack, and the cutting device 900 is arranged above the laminating device 400. For example, as shown in Figure 1 and Figure 9As shown, the cutting device 900 is arranged above the laminating device 400. When the cell laminating raw material is long enough to stack multiple groups of lithium battery cell laminates 1000, the cell laminating raw material needs to be cut after each group of lithium battery cell laminates 1000 is stacked to prepare for the next group of lithium battery cell laminates. By arranging the cutting device 900 in the lithium battery cell forming device, the cutting device 900 can automatically cut the cell laminating raw material to separate the lithium battery cell laminates 1000 after each group of lithium battery cell laminates 1000 is completed, effectively improving the production efficiency of the lithium battery cell forming device. Specifically, after a group of lithium battery cell laminates 1000 is completed, the second baffle 420 is lowered first, the taking device 810 grabs the lithium battery cell laminates 1000 and moves backward, the second feeding device 500 continues to feed the part of the separator film in the cell laminating raw material, the pulling device 600 moves to grab the part of the separator film in the cell laminating raw material, the cutting device 900 moves downward to cut the cell laminating raw material, so that the lithium battery cell laminates 1000 are separated from the cell laminating raw material, after the cutting is completed, the cutting device 900, the receiving plate 430 and the second stopper 320 are reset, the pulling device 600 grabs the cell laminating raw material and is reset, ready for the next group of lithium battery cell laminates 1000. The cutting method of the cutting device 900 includes hot melting cutting, laser cutting and mechanical cutting, but is not limited to one of the three.

[0051] According to the lithium battery cell forming method of the second embodiment of the present application, the method comprises the following steps: feeding the positive plate 1020 and the negative plate 1030 by the first feeding device 200, so that the negative plate 1030 and the positive plate 1020 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 plate 1030 close to the first roller body 110, and rotating the second roller body 120 while sucking the positive plate 1020 close to the second roller body 120; rotating the first roller body 110 and the second roller body 120 to drive the negative plate 1030 and the positive plate 1020 to rotate respectively, and pressing the negative plate 1020 and the positive plate 1030 on both sides of the separator film 1010 between the two rollers to form a cell laminating raw material, and guiding the cell laminating raw material out of the two rollers by the second feeding device 500; and feeding the cell laminating raw material into the laminating device 400 to complete the lamination.

[0052] According to the above forming method, the efficiency and quality of the lithium battery cell forming are effectively improved. Specifically, the feeding of the positive plate and the negative plate, the lamination of the positive plate and the negative plate, the feeding of the cell laminating raw material and the stacking of the cell laminating raw material are performed simultaneously, and the user only needs to pre-set the positive plate, the negative plate and the separator film 1010 in the lithium battery cell forming device, and the forming of the lithium battery cell will be continuously performed, which is more efficient than the traditional lithium battery cell forming device.

[0053] According to the second aspect of the present application, the method for forming a lithium battery cell further comprises the following steps before the step of "the first roller body 110 rotates and sucks the negative electrode sheet 1030 close to it, and the second roller body 120 rotates and sucks the positive electrode sheet 1020 close to it": the first feeding device 200 feeds the negative electrode sheet 1030 and the positive electrode sheet 1020 to the positioning device 300 respectively; and after the negative electrode sheet 1030 and the positive electrode sheet 1020 are fed to the positioning device 300, they are moved obliquely under the drive of the correction body 331 and are positioned by contacting the stoppers at the edges of the positioning device 300.

[0054] According to the above forming method, the positioning device 300 corrects the position of the electrode sheet on it before the electrode sheet is sucked by the first roller body 110 or the second roller body 120. The correction process is as follows: after the electrode sheet reaches the positioning device 300, it is moved obliquely under the drive of the correction body 331, and when the electrode sheet contacts the first stopper 310 and the second stopper 320 at the edges of the positioning device 300 at the same time, the positioning is completed. The setting of the correction process in the lamination method can ensure the feeding accuracy of the positive and negative electrode sheets, and the positioning device 300 is arranged at the end of the first feeding device 200, so that the correction and feeding are performed simultaneously, thereby improving the efficiency of the lamination of the positive and negative electrode sheets of the cell.

[0055] According to the second aspect of the present application, the method for forming a lithium battery cell further comprises the following steps before the step of "the first roller body 110 rotates and sucks the negative electrode sheet 1030 close to it, and the second roller body 120 rotates and sucks the positive electrode sheet 1020 close to it": the first feeding device 200 feeds the negative electrode sheet 1030 and the positive electrode sheet 1020 to the positioning device 300 respectively; and after the negative electrode sheet 1030 and the positive electrode sheet 1020 are fed to the positioning device 300, they are moved obliquely under the drive of the correction body 331 and are positioned by contacting the stoppers at the edges of the positioning device 300.

[0056] Through the above forming method, the automatic lamination of the battery cell can be efficiently and accurately completed. By arranging the second feeding device 500 and the lamination device 400, and the pulling device 600 arranged therebetween, after the second feeding device 500 sends out the battery cell lamination raw material, the battery cell lamination raw material will fall into the receiving cavity to complete the automatic lamination of the battery cell. The feeding process and the lamination process are simultaneously performed, so that the battery cell forming lamination can be efficiently performed.

[0057] According to the second aspect of the embodiment of the present application, the forming method of the lithium battery cell, the "second feeding device 500 sends out the battery cell lamination raw material above the lamination device 400" includes that the second feeding device 500 is arranged obliquely and sends out the battery cell lamination raw material above the obliquely arranged lamination device 400 at a certain angle.

[0058] Through the above forming method, the second feeding device 500 and the lamination device 400 are arranged obliquely, so that the battery cell lamination raw material can be sent out at a certain angle and automatically laminated in the receiving cavity, the angle of deflection of the battery cell lamination raw material during the feeding and lamination process is reduced, and the forming quality of the lithium battery cell lamination 1000 is improved.

[0059] The following refers to Figures 1 to 12 The forming equipment of the lithium battery cell and the forming method thereof according to the embodiment of the present application are described in detail with a specific embodiment. It is worth understanding that the following description is only exemplary and is not a specific limitation of the invention.

[0060] As Figures 1 to 12As shown, the lithium battery cell forming equipment includes a rack, a pasting device 100, a suction device, a positioning device 300, a laminating device 400, a first feeding device 200, a second feeding device 500, a pulling device 600, an air knife 700, a material taking device 810, a flattening device 820 and a cutting device 900. The rack serves as the skeleton of the lithium battery cell forming equipment, and each device in the lithium battery forming equipment is arranged on the rack. The pasting device 100 includes a first roller body 110, a second roller body 120 and a first driving device 130. The first roller body 110 and the second roller body 120 are arranged side by side, with only a gap for the separator 1010 and the positive and negative electrode sheets to pass through in between. The first roller body 110 and the second roller body 120 are drivingly connected with the first driving device 130, and the suction device is arranged on the first roller body 110 and the second roller body 120; the positioning device 300 is provided with two, and is arranged below the first roller body 110 and the second roller body 120 respectively. The positioning device 300 includes a first stop block 310, a second stop block 320 and a correction platform 330. The first stop block 310 and the second stop block 320 are arranged at the edges of the positioning device 300. The correction platform 330 is provided with a plurality of correction bodies 331 inclined to the conveying direction of the first feeding device 200. The first feeding device 200 is provided with two, and the ends of the conveying directions of the two first feeding devices 200 are connected with the two positioning devices 300 respectively; the laminating device 400 includes a first baffle 410, a second baffle 420, a material collecting plate 430, a second driving device 440 and a third driving device 450. The first baffle 410, the second baffle 420 and the material collecting plate 430 form a receiving cavity. The bottom surface of the receiving cavity has an included angle α with the horizontal plane. The second driving device 440 is drivingly connected with the material collecting plate 430, and the third driving device 450 is drivingly connected with the second baffle 420; the second feeding device 500 is arranged above the laminating device 400, and the end of the conveying direction of the second feeding device 500 is opposite to the top of the receiving cavity. The feeding platform of the second feeding device 500 has an included angle β with the bottom of the receiving cavity; the pulling device 600 is arranged between the first feeding device 200 and the laminating device 400; the air knife 700 is arranged between the first feeding device 200 and the laminating device 400 and opposite to the pulling device 600; the cutting device 900 is arranged above the laminating device 400; the material taking device 810 and the flattening device 820 are arranged behind the laminating device 400.

[0061] The method for forming the lithium battery cell is as follows: first, the user sets the positive electrode sheet 1020 and the negative electrode sheet 1030 on the two first feeding devices 200 respectively, the first feeding devices 200 feed the positive electrode sheet 1020 and the negative electrode sheet 1030 to the corresponding positioning devices 300 respectively, the positive and negative electrode sheets move obliquely under the conveying action of the correction body 331 after entering the correction platform 330, until they contact the first stop block 310 and the second stop block 320 at the edge of the positioning device 300, the positioning is completed, the first roller body 110 and the second roller body 120 adsorb the positioned electrode sheet under the action of the adsorption device, and drive it to rotate together, when the positive electrode sheet 1020 and the negative electrode sheet 1030 rotate to between the two rollers with the roller body, they are pressed and pasted on the separator 1010 to form the cell stack raw material, the cell stack raw material is led out between the first roller body 110 and the second roller body 120 under the traction of the second feeding device 500. When the first end of the cell stack raw material is sent out by the second feeding device 500, the pulling device 600 moves and grabs the first end of the cell stack raw material, and then pulls the first end of the cell stack raw material to the back of the first baffle 410, the second feeding device 500 continues to feed, the part of the cell stack raw material with the electrode sheet is sent out at a certain angle and enters the storage cavity, when the part of the cell stack raw material with the electrode sheet enters the storage cavity, it will pull the part of the cell stack raw material with the separator previously sent out and press it below, at this time the pulling device 600 releases the grabbing, the part of the cell stack raw material with the electrode sheet will stack the part of the cell stack raw material with the separator below, and the first layer of the lithium battery cell is completed; the second feeding device 500 continues to feed, the part of the cell stack raw material with the electrode sheet and the part of the cell stack raw material with the separator are sent out alternately, when the part of the cell stack raw material with the separator is sent out, the air knife 700 works, so that the part of the cell stack raw material with the separator has a tendency to move towards the pulling device 600, preventing the part of the cell stack raw material with the separator from stacking together, the part of the cell stack raw material with the electrode sheet is sent out and falls into the storage cavity automatically, and it will pull the part of the cell stack raw material with the separator previously sent out and stack it below, the storage plate 430 will descend one stroke under the drive of the second driving device 440 every time the cell stack raw material is stacked in the storage cavity, after the cell stack raw material is stacked for several layers, the stacking of one group of lithium battery cells is completed. At this time, the second baffle 420 descends under the drive of the third driving device 450, the taking device 810 extends into the stacking device 400 to grab the lithium battery cell stack 1000, the pulling device 600 adsorbs the part of the cell stack raw material with the separator, and the cutting device 900 descends to cut off the connection between the cell stack raw material and the lithium battery cell stack 1000. After the connection is cut off, the taking device 810 takes out the lithium battery cell stack 1000, the smoothing device 820 pastes the excess separator 1010 on the surface of the lithium battery cell stack 1000, and the formation of the lithium battery cell is completed.After the lithium battery cell is taken out, the pulling device 600, the cutting device 900, the flattening device 820 and the taking device 810 are reset, so as to prepare for the next lithium battery cell forming.

[0062] According to the lithium battery cell forming equipment, the positioning device 300 can correct the position of the positive and negative electrode sheets before the positive and negative electrode sheets are attached to each other, so as to improve the quality of the cell lamination raw material. When the cell lamination raw material enters the receiving cavity for lamination, the receiving cavity can position the part of the cell lamination raw material to which the electrode sheet is attached, so as to ensure the lamination accuracy of the cell lamination raw material and effectively improve the quality of the lithium battery cell forming. During the lamination process, the wind knife 700 works to make the part of the isolation film in the cell lamination raw material have a tendency to move towards the pulling device 600, so as to avoid that the parts of the isolation film in the cell lamination raw material are stacked together during the high-speed lamination of the lithium battery cell, thereby affecting the forming quality of the lithium battery cell. After each lamination, the receiving plate 430 is lowered by one stroke under the driving of the second driving device 440, so that the part of the cell lamination raw material to which the electrode sheet is attached is at the same height each time when entering the receiving cavity, thereby ensuring the smooth operation of the lamination process. After the lamination is completed, the second baffle 420 is lowered under the driving of the third driving device 450, and the pulling device 600, the cutting device 900, the taking device 810 and the flattening device 820 are cooperatively actuated to take out the lithium battery cell lamination 1000, cut off the connection between the lithium battery cell lamination 1000 and the cell lamination raw material, and attach the excess isolation film 1010 to the surface of the lithium battery cell, thereby improving the forming quality of the lithium battery cell. The various processes in the lithium battery cell forming equipment are simultaneously performed, so as to realize the efficient forming of the lithium battery cell.

[0063] In the description of the present 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 present application. In the present 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.

[0064] Although the embodiments of the present 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 spirits of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A lithium battery cell forming apparatus, characterized by, The application relates to a battery electrode laminating device. The battery electrode laminating device comprises a rack, a laminating device (100) comprising a first roller body (110), a second roller body (120) and a first driving device (130), the first roller body (110) and the second roller body (120) are arranged on the rack and the roller cores are arranged on the same plane, the first driving device (130) is drivingly connected with the first roller body (110) and the second roller body (120), an adsorbing device arranged on the first roller body (110) and the second roller body (120), a plurality of first feeding devices (200) for feeding positive electrode sheets (1020) or negative electrode sheets (1030) close to the first roller body (110) or the second roller body (120) respectively, a laminating device (400) comprising a receiving cavity for laminating and receiving a completed battery cell, a second feeding device (500) for leading battery cell laminating raw materials out of the first roller body (110) and the second roller body (120) and conveying the battery cell laminating raw materials to the laminating device (400), the end of the conveying direction of the second feeding device (500) is above the higher side of the receiving cavity, a pulling device (600) arranged on the rack, the pulling device (600) is arranged between the laminating device (400) and the second feeding device (500), the pulling device (600) is used for moving and grabbing the head end of the battery cell laminating raw materials and dragging the head end of the battery cell laminating raw materials to move below the second feeding device (500), wherein the head end of the battery cell laminating raw materials is the part of the isolation film in the battery cell laminating raw materials, an angle alpha is formed between the bottom surface of the receiving cavity and the horizontal plane, the second feeding device (500) comprises a feeding platform, and an angle beta is formed between the feeding platform and the bottom surface of the receiving cavity. The battery electrode laminating device further comprises a positioning device (300) for positioning the electrode sheet close to the first roller body (110) or the second roller body (120). The laminating device (100) further comprises a control device (140), the first roller body (110) and the second roller body (120) are movably arranged on the rack, and the control device (140) is used for adjusting the distance and the pressure between the first roller body (110) and the second roller body (120). ​ ​ ​ ​ ​ 2. The lithium battery cell forming apparatus of claim 1, wherein, ​ 3. The lithium battery cell forming apparatus of claim 1, wherein, ​ 4. The lithium battery cell forming apparatus of claim 1, wherein, The lamination device (400) comprises a first baffle (410), a second baffle (420), a material collecting plate (430), a second driving device (440) and a third driving device (450), the material collecting plate (430) is arranged between the first baffle (410) and the second baffle (420), and the first baffle (410) and the second baffle (420) are mutually enclosed to form the receiving cavity, the second driving device (440) is drivingly connected with the material collecting plate (430), and the third driving device (450) is drivingly connected with the second baffle (420).

5. The lithium battery cell forming apparatus of claim 1, wherein, Further comprising a wind knife (700), the wind knife (700) is arranged on the rack, and the air outlet direction of the wind knife (700) points to between the lamination device (400) and the second feeding device (500).

6. The lithium battery cell forming apparatus of claim 1, wherein, Further comprising a cutting device (900), the cutting device (900) is arranged on the rack, and the cutting device (900) is arranged above the lamination device (400).

7. A method of forming a lithium battery cell, the method comprising: The application is applied to the lithium battery cell forming equipment as claimed in any one of claims 1 to 6, comprising the following steps: The positive electrode sheet (1020) and the negative electrode sheet (1030) are transported by the first feeding device (200), so that the negative electrode sheet (1030) and the positive electrode sheet (1020) are respectively close to the first roller body (110) and the second roller body (120); The first roller body (110) rotates while sucking the negative electrode sheet (1030) close thereto, and the second roller body (120) rotates while sucking the positive electrode sheet (1020) close thereto; The first roller body (110) and the second roller body (120) drive the negative electrode sheet (1030) and the positive electrode sheet (1020) to rotate respectively, and press the negative electrode sheet (1030) and the positive electrode sheet (1020) on both sides of the isolation film (1010) between the two rollers to form a cell lamination raw material, and the second feeding device (500) leads out the cell lamination raw material between the two rollers; The second feeding device (500) sends the cell lamination raw material into the lamination device (400) to complete lamination.

8. The lithium battery cell forming method according to claim 7, characterized in that, Before the step of "the first roller body (110) rotates while sucking the negative electrode sheet (1030) close thereto, and the second roller body (120) rotates while sucking the positive electrode sheet (1020) close thereto", the following steps are further included: The first feeding device (200) respectively sends the negative electrode sheet (1030) and the positive electrode sheet (1020) to the positioning device (300); After the negative electrode sheet (1030) and the positive electrode sheet (1020) are transported to the positioning device (300), they are driven by the correction body (331) to move obliquely and contact the stop block at the edge of the positioning device (300) to complete positioning.

9. The lithium battery cell forming method according to claim 7, characterized in that, The step of "the second feeding device (500) sends the cell lamination raw material into the lamination device (400) to complete lamination" comprises the following steps: The second feeding device (500) sends the cell lamination raw material above the lamination device (400); The pulling device (600) grabs the first end of the sent-out battery cell lamination raw material and drives it to move to the front of the lamination device (400), and the first end of the battery cell lamination raw material is the part of the isolation film in the battery cell lamination raw material; The second feeding device (500) continues to feed, and the part of the battery cell lamination raw material with the pole piece is sent out and falls into the lamination device (400), the pulling device (600) releases the first end of the battery cell lamination raw material, and the part of the battery cell lamination raw material with the pole piece pulls the part of the isolation film in the battery cell lamination raw material flat and stacks above the part of the isolation film in the battery cell lamination raw material; The second feeding device (500) continues to feed, and the part of the battery cell lamination raw material with the pole piece is sent out and falls into the lamination device (400), the pulling device (600) releases the first end of the battery cell lamination raw material, and the part of the battery cell lamination raw material with the pole piece pulls the part of the isolation film in the battery cell lamination raw material flat and stacks above the part of the isolation film in the battery cell lamination raw material; The second feeding device (500) continues to feed, and the part of the battery cell lamination raw material with the pole piece is sent out and falls into the lamination device (400), the pulling device (600) releases the first end of the battery cell lamination raw material, and the part of the battery cell lamination raw material with the pole piece pulls the part of the isolation film in the battery cell lamination raw material flat and stacks above the part of the isolation film in the battery cell lamination raw material; 10. The method of claim 9, wherein the lithium battery cell is formed by, The second feeding device (500) continues to feed until the lamination of a group of battery cells is completed. The second feeding device (500) sends the battery cell lamination raw material above the lamination device (400) includes that the second feeding device (500) is obliquely arranged and sends the battery cell lamination raw material above the obliquely arranged lamination device (400) at a certain angle.

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