A battery core stacking machine with rotary wheel feeding and a battery core stacking method

Abstract

The present invention discloses a battery cell stacking machine and a battery cell stacking method with a rotary wheel feeding method, wherein the stacking device includes two electrode sheet feeding devices, a stacking platform, and a diaphragm conveying device. The two electrode sheet feeding devices are respectively a positive electrode sheet feeding device and a negative electrode sheet feeding device, the positive electrode sheet feeding device and the negative electrode sheet feeding device are respectively arranged on both sides of the diaphragm conveying device, and the stacking platform is arranged between the positive electrode sheet feeding device and the negative electrode sheet feeding device; the positive electrode sheet feeding device and the negative electrode sheet feeding device each include a rotating frame, a rotary drive mechanism, and at least two storage seats, the storage seats are arranged at equal intervals along the rotation direction of the rotating frame, and each storage seat is provided with a fixing component; and a tray loading mechanism is also included. During the continuous stacking process of the battery cell electrode sheets, a separation tray is located between two adjacent stacked battery cells. The present invention effectively improves the stacking speed and accuracy of the electrode sheets and has good stability, thereby greatly improving the quality and production efficiency of the battery cell products.

Description

Technical Field

[0001] The present invention relates to a stacking device for producing battery cells, and in particular to a battery cell stacking machine with rotary feeding and a battery cell stacking method. Background Art

[0002] Lithium batteries, with their environmentally friendly nature, strong adaptability to ambient temperatures, and long service life, are currently widely used in automobiles, energy storage systems, consumer electronics, and other products, such as hydropower, thermal, wind, and solar power plants, as well as power tools, electric bicycles, electric motorcycles, electric vehicles, military equipment, and aerospace. Laminated lithium batteries are a key application for automotive lithium batteries.

[0003] A laminated lithium battery is a lithium battery manufactured using a lamination process. The lamination process involves alternately laminating multiple positive and negative electrodes and pairing diaphragms between the positive and negative electrodes. After compression bonding and subsequent circuit processing, a laminated battery cell is formed. Depending on the size of the battery cell, the corresponding positive and negative electrodes are of different sizes. A connection end called a tab extends from the side of each electrode. In a laminated battery cell, all the tabs of the positive electrodes are overlapped and welded together to form a positive terminal, and all the tabs of the negative electrodes are overlapped and welded together to form a negative terminal. Currently, there are many process methods in the battery cell lamination industry. Usually, the positive and negative electrodes are alternately transported to the diaphragm through a electrode feeding mechanism, and the action of the diaphragm folding mechanism is coordinated to achieve the stacking of hundreds of electrodes. However, due to the large number of stacked electrodes, the stacking process is completed by alternating the positive and negative electrodes, which is extremely inefficient and time-consuming, and is not conducive to the efficient production of battery cells. Therefore, the speed of cell stacking production is the main bottleneck of the entire production process. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a battery cell stacking machine with a rotary wheel feeding, which effectively improves the stacking speed and accuracy of the electrode sheets and has good stability, thereby greatly improving the quality of battery cell products and production efficiency.

[0005] Another object of the present invention is to provide a battery cell stacking method with rotary feeding.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A battery cell stacking machine with a rotary feeding mechanism is characterized in that it comprises two oppositely arranged electrode sheet feeding devices, a stacking platform for stacking electrode sheets, and a diaphragm conveying device for conveying diaphragms, wherein the two electrode sheet feeding devices are respectively a positive electrode sheet feeding device and a negative electrode sheet feeding device, the positive electrode sheet feeding device and the negative electrode sheet feeding device are respectively arranged on both sides of the diaphragm conveying device, and the stacking platform is arranged between the positive electrode sheet feeding device and the negative electrode sheet feeding device; wherein,

[0008] The positive electrode sheet feeding device and the negative electrode sheet feeding device each include a rotating frame, a rotary drive mechanism for driving the rotating frame to rotate intermittently, and at least two storage seats provided on the rotating frame and used to load the electrode sheets, wherein the storage seats are arranged at equal intervals along the rotation direction of the rotating frame, and each storage seat is provided with a fixing assembly for fixing or loosening the electrode sheet; the positive electrode sheet feeding device and the negative electrode sheet feeding device are further provided with a telescopic drive mechanism for driving the rotating frame or the storage seats on the rotating frame to move closer to or away from the stacking table, thereby placing the electrode sheet on the stacking table;

[0009] The diaphragm conveying device includes a rotating roller, a release driving mechanism for driving the rotating roller to rotate to release the diaphragm, and a diaphragm laying mechanism for pushing the diaphragm to be folded and laid on the laminating table in a reciprocating Z-shaped trajectory;

[0010] The stacking table is vertically slidably mounted on a frame, and a vertical driving mechanism is provided on the frame for driving the stacking table to slide vertically so that the stacked electrode sheets sink downward. The stacking table is provided with a clamping device for clamping the diaphragm and the electrode sheets when laying the diaphragm and the electrode sheets. When the positive electrode sheet feeding device or the negative electrode sheet feeding device lays a electrode sheet, the clamping device clamps the electrode sheet and one end of the diaphragm, making it easier for the diaphragm laying mechanism to subsequently lay the next layer of diaphragm to achieve alternating stacking of positive and negative electrode sheets between the diaphragms.

[0011] It also includes a tray loading mechanism for feeding a separation tray onto the stacking table after the pole pieces of a single battery cell are stacked. During the continuous stacking process of the battery cell pole pieces, the separation tray is located between two adjacent stacked battery cells.

[0012] The working principle of the above-mentioned rotary feeding battery cell stacking machine is:

[0013] The other side of the positive electrode sheet feeding device and the negative electrode sheet feeding device (the side opposite to the laminating table) is provided with an electrode sheet loading station, and the positive electrode sheets and negative electrode sheets to be laminated are transported to the storage seats of the rotating racks of the positive electrode sheet feeding device and the negative electrode sheet feeding device respectively by means of a manipulator or a conveyor belt; the diaphragm conveying device is arranged above the laminating table, and during the laminating process, the release drive mechanism drives the rotating roller to rotate to realize the release of the diaphragm, and the diaphragm to be laminated is transported from top to bottom in the vertical direction, and the starting end of the diaphragm is It is fixed to one side of the stacking table by a clamping device (the working principle in this article takes the starting end of the diaphragm fixed on the side of the stacking table close to the negative electrode sheet feeding device as an example. Obviously, the starting end of the diaphragm can also be fixed on the side of the stacking table close to the positive electrode sheet feeding device). During the processing, the vertical drive mechanism drives the stacking table to move downward intermittently. The rotation of the rotating roller, the reciprocating folding of the diaphragm and the downward movement of the stacking table are all coordinated with the positive electrode sheet feeding device and the negative electrode sheet feeding device, thereby realizing intermittent and efficient stacking processing.

[0014] First, the diaphragm laying mechanism lays the diaphragm from the side of the stacking table close to the negative electrode sheet feeding device to the side close to the positive electrode sheet feeding device, and the release drive mechanism cooperates to drive the rotating roller to rotate to realize the release of the diaphragm, so that the diaphragm is laid on the stacking table under the action of the diaphragm laying mechanism, waiting for the negative electrode sheet to be stacked.

[0015] Then, driven by the rotary drive mechanism, the rotating frames of the positive electrode sheet feeding device and the negative electrode sheet feeding device rotate intermittently. When the storage seat without electrode sheets rotates to the loading station, the positive electrode sheets and negative electrode sheets to be stacked are transported to the storage seats of the corresponding rotating frames; when the storage seat loaded with negative electrode sheets on the rotating frame of the negative electrode sheet feeding device rotates to one side of the stacking platform, the telescopic drive mechanism drives the entire rotating frame or drives the storage seat loaded with negative electrode sheets to move to the side close to the stacking platform alone. When the storage seat drives the negative electrode sheets to move After moving to the top of the diaphragm on the stacking table, the clamping device clamps the negative electrode sheet and the diaphragm laid on the stacking table on the side close to the positive electrode sheet feeding device, and drives the storage seat to retract separately under the drive of the telescopic drive mechanism, thereby completing the stacking of the negative electrode sheet on the diaphragm; then, the rotary drive mechanism drives the negative electrode sheet feeding device to continue to rotate one grid, so that the next storage seat loaded with negative electrode sheets corresponds to the stacking table, and the empty storage seat is rotated to the loading station, and the negative electrode sheet of the empty storage seat is loaded while waiting for the positive electrode sheet to be stacked.

[0016] Next, the diaphragm laying mechanism drives the diaphragm to be laid from the side close to the positive electrode sheet feeding device to the side close to the negative electrode sheet feeding device, that is, it is folded and laid in a "Z"-shaped trajectory, so that the diaphragm is laid on the top of the aforementioned superimposed negative electrode sheet. During the laying process, the release drive mechanism cooperates to drive the rotating roller to release the diaphragm of a specified length.

[0017] After completing the stacking of a negative electrode sheet and the laying of the diaphragm, the telescopic drive mechanism of the positive electrode sheet feeding device drives the rotating frame or the storage seat loaded with positive electrode sheets and corresponding to the stacking platform to move toward the stacking platform, so that the storage seat and the positive electrode sheet are located on the top surface of the diaphragm. At this time, the positive electrode sheet and diaphragm that have just been stacked and all the electrode sheets and diaphragms that have been stacked before are clamped together by the clamping device to ensure that the position is fixed, and the storage seat is driven by the telescopic drive mechanism to retract alone, so that the positive electrode sheet is stacked on the diaphragm; then, the rotary drive mechanism drives the positive electrode sheet feeding device to continue rotating one grid, so that the next storage seat loaded with positive electrode sheets corresponds to the stacking platform, and the empty storage seat is rotated to the loading station, and the positive electrode sheet of the empty storage seat is loaded while waiting for the next negative electrode sheet to be stacked.

[0018] In this way, the diaphragm laying mechanism is used to realize the rapid reversing and folding laying of the diaphragm, and the alternating extension and contraction of the positive electrode sheet feeding device and the negative electrode sheet feeding device are combined to feed the electrode sheets. At the same time, the diaphragm is released by the diaphragm conveying device and the stacking table is lowered. The battery cell electrode sheets are stacked efficiently, accurately and stably in a rotating manner.

[0019] During the stacking process of battery cell electrodes, after completing the stacking of a single battery cell electrode, the tray loading mechanism transports a partition tray to the stacking table. The partition tray can be one or more. Before and after placing the partition tray, the diaphragm laying mechanism lays the diaphragm normally in the same way as when placing the positive and negative electrodes, that is, the partition tray is also located between the laid diaphragms. The purpose of laying the above-mentioned partition tray is: on the one hand, it can realize the continuous stacking of battery cell electrodes without pausing in the middle, which greatly improves production efficiency. Specifically, after completing the stacking of a battery cell electrode, there is no need to pause to take out the battery cell, but continue stacking after placing the partition tray. After completing the stacking of several battery cell electrodes, the vertical drive mechanism can be used to drive the stacking table to move downward, driving the multiple battery cells that have been stacked to move downward. At this time, the partition tray under the battery cells being stacked can temporarily replace the stacking table as a support base for stacking. At this time, an external mechanism can be set to support the partition tray, which drives the partition tray to move downward to cooperate with the stacking action of the electrodes; and the several battery cells that have been stacked as the stacking table descends can be taken out, packaged, etc. through other mechanisms. After the action is completed, the stacking table rises to the stacking position and resumes its role as a support base for stacking. The role of the seat is to remove a single battery cell without pausing during the stacking process, thereby significantly improving production efficiency; on the other hand, by arranging a partition tray between two adjacent battery cells, the diaphragm between the two adjacent battery cells can be divided at the partition tray, so that no damage is caused to the nearby pole pieces. For example, the diaphragm can be cut at the end of the partition tray by laser cutting or tool cutting, thereby eliminating the risk of damage to the adjacent pole pieces during cutting; thirdly, by arranging a partition tray, since the partition tray is also arranged between the diaphragms, a certain length of diaphragm can be stored at both ends of the battery cell. Therefore, after taking out the partition tray, for the battery cell that needs to be wrapped with a diaphragm, the diaphragm stored at both ends can be used for wrapping, which cleverly realizes the reservation of diaphragms at both ends of the battery cell, and by arranging different numbers of partition trays, diaphragms of different lengths can be reserved.

[0020] In a preferred embodiment of the present invention, the tray loading mechanism adopts a positive electrode sheet feeding device and / or a negative electrode sheet feeding device.

[0021] According to a preferred embodiment of the present invention, electrode loading devices are provided behind the positive electrode feeding device and the negative electrode feeding device along the moving direction of the positive electrode and the negative electrode; wherein, the electrode loading device includes an electrode feeding mechanism and an electrode conveying mechanism, and the electrode feeding mechanism is arranged behind the electrode conveying mechanism; the electrode feeding mechanism includes an electrode storage table for storing multiple electrode sheets to be superimposed, a suction component for sucking the electrode sheets, and a transport drive mechanism for driving the suction component to transfer between the electrode storage table and the electrode conveying mechanism, the suction component includes a plurality of vacuum suction cups, and the plurality of vacuum suction cups are connected to the vacuum equipment; the electrode conveying mechanism includes a transmission belt and a transmission drive mechanism for driving the conveyor belt to operate, one end of the conveyor belt is docked with the electrode storage table, and the other end of the conveyor belt is docked with the storage seat of the electrode feeding device.

[0022] Preferably, the pole piece conveying mechanism is provided with two groups, namely the first pole piece conveying mechanism and the second pole piece conveying mechanism; along the moving direction of the pole piece, the first pole piece conveying mechanism is arranged behind the second pole piece conveying mechanism; the frame is provided with an adjustment drive mechanism for driving the second pole piece conveying mechanism to move perpendicular to the moving direction of the pole piece.

[0023] According to a preferred embodiment of the present invention, the fixing assembly on the storage seat includes a plurality of vacuum adsorption components, and the plurality of vacuum adsorption components are connected to a vacuum device.

[0024] In a preferred embodiment of the present invention, the clamping device includes two groups of telescopic clamping mechanisms, which are respectively arranged on the other two opposite sides of the stacking table; wherein each of the telescopic clamping mechanisms includes a clamping member and a clamping drive mechanism that drives the clamping member to move to clamp or loosen the pole pieces and diaphragms on the stacking table.

[0025] Preferably, the clamping drive mechanism includes a telescopic rod, a telescopic power source for driving the telescopic rod to telescopically move, a power block and a motion block, and the telescopic rod is arranged obliquely downward along the telescopic direction of the telescopic rod; the telescopic power source is fixed on the frame, the power block is slidably arranged on the frame, the power block is fixedly connected to the telescopic rod, the motion block is slidably connected to the telescopic rod and a limit block is provided in front of the motion block for limiting the extreme position of the motion block moving forward, the motion block is provided in front of the power block, and an elastic element is provided between the power block and the motion block; the clamping piece can be vertically slidably arranged on the motion block, and the clamping piece and the power block are rotatably connected to each other through a connecting rod.

[0026] Preferably, a vertical guide module is provided on the moving block, and the vertical guide module includes a guide rail and a slider. The slider is fixedly connected to the moving block, and the guide rail is cooperatively connected to the slider and fixedly connected to the pressing member.

[0027] Preferably, the clamping member includes a pressing plate and a connecting rod, the pressing plate extends in the horizontal direction, one end of the connecting rod is connected to the rear end of the pressing plate, the other end of the connecting rod extends downward, and the connecting rod is fixedly connected to the guide rail; a connecting plate extending downward is provided on the power block, one end of the connecting rod is rotatably connected to the lower end of the connecting rod, and the other end of the connecting rod is rotatably connected to the lower end of the connecting plate.

[0028] A high-efficiency battery cell lamination method, characterized by comprising the following steps:

[0029] (1) The diaphragm laying mechanism lays the diaphragm from one side of the lamination table to the other side, and the release drive mechanism cooperates with the driving roller to rotate to realize the release of the diaphragm, so that the diaphragm is laid on the lamination table under the action of the diaphragm laying mechanism, waiting for the lamination of the pole pieces;

[0030] (2) The rotary drive mechanism drives the rotating frame of the positive electrode sheet feeding device or the negative electrode sheet feeding device to rotate, so that the electrode sheets on the storage seat correspond to the stacking table; the telescopic drive mechanism drives the rotating frame or the storage seat to extend close to the stacking table, so that the storage seat and the electrode sheets move to the top of the diaphragm of the stacking table, and at this time the clamping device clamps the diaphragm and the electrode sheets on the top of the diaphragm; the telescopic drive mechanism drives the rotating frame or the storage seat to retract separately from the stacking table, so that the storage seat and the electrode sheets on the diaphragm are separated; then the rotary drive mechanism drives the rotating frame of the positive electrode sheet feeding device or the negative electrode sheet feeding device to rotate one grid, so that the next storage seat loaded with electrode sheets corresponds to the stacking table, waiting for the next electrode sheet to be stacked; at the same time, the unloaded storage seat corresponds to the electrode sheet loading station, and the electrode sheets are loaded;

[0031] (3) The diaphragm laying mechanism lays the next layer of diaphragm on the electrode sheet that has just been laminated; the vertical drive mechanism drives the lamination table to move downward so that the lamination table corresponds to the electrode sheet on the storage seat of the negative electrode sheet feeding device or the positive electrode sheet feeding device;

[0032] (4) The rotary drive mechanism drives the rotating frame of the negative electrode sheet feeding device or the positive electrode sheet feeding device to rotate, so that the electrode sheets on the storage seat correspond to the stacking table; the telescopic drive mechanism drives the rotating frame or the storage seat to extend close to the stacking table, so that the storage seat and the electrode sheets move to the top of the diaphragm of the stacking table, and at this time, the clamping device clamps the diaphragm, the electrode sheets on the top of the diaphragm, and all the electrode sheets and diaphragms that have been stacked before; the telescopic drive mechanism drives the rotating frame or the storage seat to retract separately from the stacking table, so that the storage seat and the electrode sheets on the diaphragm are separated; then the rotary drive mechanism drives the rotating frame of the negative electrode sheet feeding device or the positive electrode sheet feeding device to rotate one grid, so that the next storage seat loaded with electrode sheets corresponds to the stacking table, waiting for the next electrode sheet stacking; at the same time, the unloaded storage seat corresponds to the electrode sheet loading station to load the electrode sheets;

[0033] (5) Repeat steps (1) to (4) until a specified number of positive and negative electrode sheets are stacked to form a battery cell;

[0034] (6) The tray loading mechanism lays a partition tray on top of the diaphragm of the battery cell;

[0035] (7) Repeat steps (5) to (6) to achieve continuous and efficient processing and production of multiple battery cells.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The present invention utilizes a rotating frame to realize rotary pole piece loading and pole piece stacking, and intermittent action, which effectively improves the pole piece loading speed and stacking speed, and significantly improves the production and processing efficiency; and, by adopting the intermittent stacking action, the accuracy of pole piece loading and stacking is effectively guaranteed, thereby improving the production quality of the battery cell.

[0038] 2. The present invention adopts a diaphragm laying mechanism to lay the released diaphragm on the stacking table in a Z-shaped reciprocating folding manner. The diaphragm is laid in advance to facilitate the rapid and accurate stacking of the pole pieces. The stacking stability is greatly improved, and the stacking processing efficiency and stacking accuracy are significantly improved.

[0039] 3. A separation tray is laid between two adjacent battery cells through the tray loading mechanism. On the one hand, the battery cell electrodes can be continuously stacked without pausing in the middle, which greatly improves production efficiency. In the existing technology, after the electrode stacking of a battery cell is completed, it is necessary to pause to cut and remove the diaphragm, which takes a lot of production auxiliary time and is a key factor in low production efficiency. Specifically, in the present invention, after completing the stacking of a battery cell electrode, there is no need to pause to take out the battery cell, but to continue stacking after placing a partition tray. After completing the stacking of several battery cell electrode sheets, the vertical drive mechanism can be used to drive the stacking table to move downward, driving the multiple battery cells that have been stacked to move downward. At this time, the partition tray under the stacking battery cells can temporarily replace the stacking table as a support base for the stacking. At this time, an external mechanism can be set to support the partition tray, and the external mechanism drives the partition tray to move downward to cooperate with the stacking action of the electrode sheets; and the several battery cells that have been stacked and are lowered with the stacking table can be taken out, packaged, etc. through other mechanisms. After the action is completed, the stacking table rises to the stacking position and resumes its role as a stacking support base, so that there is no need to pause to take out a single battery cell during the stacking process, which significantly improves production efficiency. On the other hand, by setting a partition tray between two adjacent battery cells, the diaphragm between the two adjacent battery cells can be divided at the partition tray, so as not to cause damage to the nearby pole pieces. For example, the diaphragm can be cut at the end of the partition tray by laser cutting or knife cutting, thereby eliminating the risk of damaging the adjacent pole pieces during cutting. Thirdly, by setting a partition tray, since the partition tray is also set between the diaphragms, a certain length of diaphragm can be stored at both ends of the battery cell. Therefore, after removing the partition tray, for the battery cell that needs to be wrapped with a diaphragm, the diaphragm stored at both ends can be used for wrapping, which cleverly realizes the reservation of diaphragms at both ends of the battery cell. Moreover, by setting different numbers of partition trays, diaphragms of different lengths can be reserved. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1-Figure 2 This is a schematic structural diagram of a first specific embodiment of a battery core stacking machine with a rotary feeding mechanism according to the present invention, wherein: Figure 1 For the main view, Figure 2 It is a three-dimensional picture.

[0041] Figure 3-Figure 4 It is a structural diagram of the positive electrode sheet feeding device, the negative electrode sheet feeding device, the clamping device, the stacking table and the supporting and transferring mechanism, wherein: Figure 3 For the main view, Figure 4 It is a three-dimensional picture.

[0042] Figure 5-Figure 6 It is a structural diagram of the clamping device, stacking table and supporting transfer mechanism, in which: Figure 5 For a three-dimensional image, Figure 6 This is a three-dimensional image without the battery cells and separator tray.

[0043] Figure 7-Figure 9 It is a structural diagram of the clamping device, wherein: Figure 7 For a three-dimensional image, Figure 8 This is the main view of the telescopic pressing mechanism. Figure 9 It is a three-dimensional diagram of the telescopic pressing mechanism.

[0044] Figure 10-12 Schematic diagram of the structure of the positive electrode sheet feeding device (or negative electrode sheet feeding device), wherein: Figure 10 It is a first-person perspective stereogram. Figure 11 For the second perspective stereogram, Figure 12 A perspective view of the rotating frame.

[0045] Figure 13-14 This is a structural diagram of a second specific embodiment of the battery core stacking machine with a rotary wheel feeder of the present invention, wherein: Figure 13 This is a schematic diagram before the pole pieces are stacked. Figure 14 Schematic diagram of the pole pieces when superimposed. DETAILED DESCRIPTION

[0046] The present invention will be further described below with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.

[0047] Example 1

[0048] See also Figures 1-12 The battery cell stacking machine with a rotary feeding method in this embodiment includes two oppositely arranged electrode feeding devices, a stacking table 4 for stacking electrode sheets, and a diaphragm conveying device 3 for conveying diaphragms. The two electrode feeding devices are a positive electrode feeding device 1 and a negative electrode feeding device 2, respectively. The positive electrode feeding device 1 and the negative electrode feeding device 2 are respectively arranged on both sides of the diaphragm conveying device 3, and the stacking table 4 is arranged between the positive electrode feeding device 1 and the negative electrode feeding device 2.

[0049] See also Figure 1-Figure 4 、 Figure 10-12 The positive electrode sheet feeding device 1 and the negative electrode sheet feeding device 2 both include a rotating frame, a rotating drive mechanism 13 for driving the rotating frame to rotate intermittently, and at least two storage seats 12 arranged on the rotating frame and used to load the electrode sheets. The storage seats 12 are arranged at equal intervals along the rotation direction of the rotating frame, and each storage seat 12 is provided with a fixing component for fixing or loosening the electrode sheet; the positive electrode sheet feeding device 1 and the negative electrode sheet feeding device 2 are also provided with a telescopic drive mechanism 6 for driving the rotating frame or driving the storage seats 12 on the rotating frame to extend and retract in the radial direction to approach or move away from the stacking table 4 to place the electrode sheet on the stacking table 4.

[0050] See also Figure 1-Figure 2 The diaphragm conveying device 3 includes a rotating roller, a release driving mechanism for driving the rotating roller to rotate to release the diaphragm, and a diaphragm laying mechanism for pushing the diaphragm to be folded and laid on the lamination table 4 in a Z-shaped trajectory.

[0051] See also Figures 1-6 The stacking table 4 can be vertically slidably arranged on the frame, and the frame is provided with a vertical driving mechanism 7 for driving the stacking table 4 to slide in the vertical direction so that the stacked electrodes sink downward; the stacking table 4 is provided with a clamping device 14 for clamping the diaphragm and the electrode when laying the diaphragm and the electrode. When the positive electrode feeding device 1 or the negative electrode feeding device 2 lays a electrode, the clamping device 14 clamps the electrode and one end of the diaphragm, so that the diaphragm laying mechanism can easily lay the next layer of diaphragm to realize the alternating stacking of positive and negative electrode sheets between the diaphragms.

[0052] The rotary feeding battery cell stacking machine of this embodiment also includes a tray loading mechanism for feeding a partition tray 15 onto the stacking table 4 after the electrode sheets of a single battery cell are stacked. During the continuous stacking process of the battery cell electrodes, the partition tray 15 is located between two adjacent stacked battery cells.

[0053] See also Figure 1-Figure 2 、 Figure 10-11 The tray loading mechanism uses the positive electrode sheet feeding device 1 and / or the negative electrode sheet feeding device 2. In other words, the positive electrode sheet feeding device 1 and / or the negative electrode sheet feeding device 2 can also serve as the loading mechanism for the separation tray 15. When the positive electrode sheet feeding device 1 and / or the negative electrode sheet feeding device 2 are taking materials, they take the separation tray 15 when it is needed and place it on the stacking table 4 in a similar manner to conveying the electrode sheets. This eliminates the need for an additional separate tray loading mechanism, which helps simplify the equipment structure.

[0054] In this embodiment, the diaphragm laying mechanism includes an oscillating roller group and an oscillating drive mechanism that drives the oscillating roller group to oscillate. The oscillating roller group is positioned above the laminating table 4. The starting end of the diaphragm is released from the rotating rollers, passes through the oscillating roller group, and reaches the laminating table 4. Preferably, the diaphragm conveying device 3 also includes a correction mechanism and a tensioning mechanism. Along the conveying direction of the diaphragm, the diaphragm sequentially passes through the correction mechanism, the tensioning mechanism, and the diaphragm laying mechanism before reaching the laminating table 4. The provision of the correction mechanism and the tensioning mechanism facilitates improving the accuracy of diaphragm conveying and ensuring appropriate tension, ensuring accurate superposition of the diaphragm and the electrode, and improving production quality. Furthermore, the diaphragm laying mechanism in this embodiment can refer to the film laying device in the prior art.

[0055] See also Figure 1-Figure 2 、 Figure 10-11, along the moving direction of the positive electrode sheet and the negative electrode sheet, the rear of the positive electrode sheet feeding device 1 and the negative electrode sheet feeding device 2 are both provided with electrode loading devices; wherein, the electrode loading device includes an electrode sheet feeding mechanism and an electrode sheet conveying mechanism, and the electrode sheet feeding mechanism is arranged behind the electrode sheet conveying mechanism; the electrode sheet feeding mechanism includes an electrode sheet storage table 32 for storing multiple electrode sheets to be superimposed, a suction component 31 for sucking the electrode sheets, and a transport drive mechanism for driving the suction component 31 to transfer between the electrode sheet storage table 32 and the electrode sheet conveying mechanism, the suction component 31 includes multiple vacuum suction cups, and the multiple vacuum suction cups are connected to the vacuum equipment; the electrode conveying mechanism includes a transmission belt and a transmission drive mechanism for driving the conveyor belt to operate, one end of the conveyor belt is docked with the electrode sheet storage table 32, and the other end of the conveyor belt is docked with the storage seat 12 of the electrode feeding device. In this embodiment, each electrode sheet feeding device includes two electrode sheet storage tables 32 and two suction components 31, thereby enabling suction and transport of two electrode sheets at a time, reducing the number of suction component operations and improving handling efficiency. Alternatively, a electrode sheet storage table 32 and a storage table for a separator tray 15 may be provided to allow for the timely transport of the separator tray 15 according to the needs of the lamination process, thereby enabling the positive electrode sheet feeding device 1 and the negative electrode sheet feeding device 2 to load the separator tray 15.

[0056] See also Figure 1-Figure 2 、 Figure 10-11 The electrode sheet conveying mechanism comprises two groups, namely a first electrode sheet conveying mechanism 33 and a second electrode sheet conveying mechanism 34. The first electrode sheet conveying mechanism 33 is arranged behind the second electrode sheet conveying mechanism 34 along the direction of movement of the electrode sheet. An adjustment drive mechanism 35 is provided on the frame for driving the second electrode sheet conveying mechanism 34 to move perpendicularly to the direction of movement of the electrode sheet. By adjusting the setting of the drive mechanism 35, the lateral direction (perpendicular to the direction of movement of the electrode sheet) of the second electrode sheet conveying mechanism 34 is adjusted, so that the electrode sheet can enter the storage seat 12 of the electrode sheet feeding device in a more precise position, thereby effectively improving the accuracy of electrode sheet superposition.

[0057] See also Figure 1-Figure 2 、 Figure 10-11 Furthermore, a cleaning module and a double-surface inspection module can be provided on the first electrode sheet conveying mechanism 33 to clean and inspect the quality of the electrodes on the first electrode sheet conveying mechanism 33, so as to promptly detect and remove unqualified electrode sheet products. At the same time, an OCR visual inspection is provided at the corresponding position of the second electrode sheet conveying mechanism 34 to detect the position of the electrodes on the second electrode sheet conveying mechanism 34, and the position of the second electrode sheet conveying mechanism 34 is adjusted by adjusting the driving mechanism 35 to improve the loading accuracy.

[0058] See also Figure 1-Figure 2 、 Figure 10-11The fixing assembly on the storage seat 12 includes multiple vacuum suction members connected to a vacuum device. Using vacuum suction to fix the electrode piece offers a simple structure, high precision, and good stability. Furthermore, during the electrode piece stacking process, the vacuum suction members can back-blow gas, thereby increasing the force required to release the electrode piece, allowing the electrode piece to be more accurately attached to the diaphragm, improving stacking accuracy and ensuring that the electrode piece can be separated from the storage seat 12.

[0059] See also Figure 5-Figure 9 The clamping device 14 includes two sets of telescopic pressing mechanisms, which are respectively arranged on the other two opposite sides of the stacking table 4; wherein each of the telescopic pressing mechanisms includes a pressing member and a pressing drive mechanism that drives the pressing member to move to tighten or loosen the pole pieces and diaphragms on the stacking table 4.

[0060] See also Figure 7-Figure 9 The clamping drive mechanism includes a telescopic rod 30, a telescopic power source 19 for driving the telescopic rod 30 to telescope, a power block 20 and a motion block 22. Along the telescopic direction of the telescopic rod 30, the telescopic rod 30 is tilted downward; the telescopic power source 19 is fixed on the frame, and the power block 20 is slidably arranged on the frame. The power block 20 is fixedly connected to the telescopic rod 30, and the motion block 22 is slidably connected to the telescopic rod 30 and a limit block 29 is provided in front of the motion block 22 for limiting the extreme position of the motion block 22 moving forward. The motion block 22 is arranged in front of the power block 20, and an elastic element 21 is provided between the power block 20 and the motion block 22; the pressing member can be vertically slidably arranged on the motion block 22, and the pressing member and the power block 20 are rotatably connected to each other through a connecting rod 23.

[0061] See also Figure 7-Figure 9 The motion block 22 is provided with a vertical guide module 27, which includes a guide rail and a slider. The slider is fixedly connected to the motion block 22, and the guide rail is engaged with the slider and fixedly connected to the pressing member. The provision of the vertical guide module 27 improves the sliding stability of the pressing member and limits its sliding direction, ensuring that the pressing member slides up and down under the action of the connecting rod 23.

[0062] See also Figure 7-Figure 9The pressing member includes a pressing plate 26 and a connecting rod 24. The pressing plate 26 is extended in the horizontal direction. One end of the connecting rod 24 is connected to the rear end of the pressing plate 26. The other end of the connecting rod 24 is extended downward. The connecting rod 24 is fixedly connected to the guide rail; a connecting plate 25 extending downward is provided on the power block 20. One end of the connecting rod 23 is rotatably connected to the lower end of the connecting rod 24. The other end of the connecting rod 23 is rotatably connected to the lower end of the connecting plate 25. The lower end of the connecting rod 24 is lower than the lower end of the connecting plate 25. In this embodiment, the telescopic power source 19 is a pneumatic cylinder, and the telescopic rod 30 is the power rod of the pneumatic cylinder. Furthermore, the pneumatic cylinder is provided with two guide rods 28 extending forward, with the telescopic rod 30 positioned between the two guide rods 28. The power block 20 is fixedly connected to the two guide rods 28, which are slidably connected to the cylinder body. The cylinder body is provided with guide holes for guiding the guide rods 28. The motion block 22 is provided with a guide sleeve, and the guide rods 28 are arranged in conjunction with the guide sleeve. The elastic element 21 is a spring that is freely mounted on the guide rods 28, and the limit block 29 is disposed at the front end of the guide rod 28.

[0063] When it is necessary to clamp the diaphragm and pole piece on the lamination table 4, the telescopic power source 19 drives the telescopic rod 30 to extend and retract forward, so that the power block 20 moves forward and downward together with the telescopic rod 30. During the movement, the guide rod 28 plays a guiding role, and the power block 20 pushes the moving block 22 to move forward and downward through the elastic element 21, thereby realizing the rapid approach of the clamping piece to the lamination table 4; when the moving block 22 slides to the limit block 29 at the front end of the guide rod 28, the moving block 22 cannot continue to slide forward and downward along the guide rod 28. At this time, since the telescopic power source 19 drives the telescopic rod 30 to continue to extend forward, while driving the power block 20 to move forward and downward, the elastic element 21 is compressed, and the clamping piece is driven to move vertically downward through the connecting rod 23, finally realizing the clamping of the diaphragm and pole piece on the lamination table 4. During the entire clamping process, the pressing member first moves forward and downward, quickly approaching the lamination table 4, and then performs a vertical downward pressing and compacting action. These two actions are performed continuously, quickly and efficiently, and the vertical downward pressing force is always maintained during the pressing process, which is stable and reliable, and is conducive to maintaining the position accuracy of the diaphragm and electrode. At the same time, when the pressing member's pressing plate 26 moves vertically downward to perform the pressing action, the power block 20 needs to overcome the elastic force of the elastic element 21 when moving forward, thereby achieving flexible pressing, avoiding rigid contact and collision between the pressing plate 26 and the diaphragm and electrode, and is conducive to protecting the completed laminated electrode and diaphragm. Similarly, when it is necessary to release the electrode and diaphragm on the lamination table 4, the telescopic power source 19 drives the telescopic rod 30 to retract, and all components move in reverse, so that the pressing member's pressing plate 26 first moves vertically upward to leave the diaphragm and electrode, and then retracts backward and upward, which also has the advantages of continuous action and protection of the electrode and diaphragm.

[0064] See also Figure 10-12 In this embodiment, the telescopic drive mechanism 6 in the positive electrode sheet feeding device 1 and the negative electrode sheet feeding device 2 drives the rotating frame to perform telescopic movement. The overall telescopic movement of the rotating frame is beneficial to simplifying the structure of the rotating frame, facilitating control, and improving movement accuracy and stacking accuracy.

[0065] See also Figures 1-6 In addition, the vertical drive mechanism 7 in this embodiment is arranged below the stacking platform 4. Specifically, the vertical drive mechanism 7 includes a mounting plate and a power source arranged at the bottom of the mounting plate. The stacking platform 4 is arranged above the mounting plate. A vertical guide mechanism is provided between the bottom of the stacking platform 4 and the mounting plate. The vertical guide mechanism includes a guide rod and a guide sleeve. The telescopic rod 30 of the power source passes through the mounting plate and is connected to the bottom of the stacking platform 4.

[0066] See also Figure 10-12In addition, the rotating frame in this embodiment includes two oppositely arranged rotating wheels 5 and a connecting rod 36 arranged between the two rotating wheels 5; the two rotating circumferential surfaces are provided with gear teeth that cooperate with the gears, and the rotating drive mechanism 13 includes a power source (motor) and a driving gear, and the driving gear is connected to the rotating wheels 5 to realize the rotation drive of the entire rotating frame. In this embodiment, four storage seats 12 are provided on the rotating frame, and the two sides of the storage seats 12 are respectively fixedly connected to the inner side surfaces of the two rotating wheels 5. The telescopic drive mechanism 6 includes a motor and two sets of screw transmission mechanisms. The two rotating wheels 5 are rotatably connected to the mounting frame. The bottom of the mounting frame is fixedly connected to the sliders of the two sets of screw transmission mechanisms. The motor is connected to the two screw transmission mechanisms through a belt transmission mechanism to realize power transmission.

[0067] See also Figures 1-12 The working principle of the battery core stacking machine with a rotary feeding mechanism in this embodiment is as follows:

[0068] The other side of the positive electrode sheet feeding device 1 and the negative electrode sheet feeding device 2 (the side opposite to the laminating table 4) is provided with an electrode sheet loading station, and the positive electrode sheets and negative electrode sheets to be laminated are transported to the storage seat 12 of the rotating frame of the positive electrode sheet feeding device 1 and the negative electrode sheet feeding device 2 respectively by means of a manipulator or a conveyor belt; the diaphragm conveying device 3 is arranged above the laminating table 4. During the laminating process, the release drive mechanism drives the rotating roller to rotate to realize the release of the diaphragm, and the diaphragm to be laminated is transported from top to bottom in the vertical direction, and the starting end of the diaphragm passes through The clamping device 14 is fixed on one side of the stacking table 4 (the working principle in this case is to take the starting end of the diaphragm fixed on the side of the stacking table 4 close to the negative electrode sheet feeding device 2 as an example. Obviously, the starting end of the diaphragm can also be fixed on the side of the stacking table 4 close to the positive electrode sheet feeding device 1). During the processing, the vertical drive mechanism 7 drives the stacking table 4 to move downward intermittently. The rotation of the rotating roller, the reciprocating folding of the diaphragm and the downward movement of the stacking table 4 are all coordinated with the positive electrode sheet feeding device 1 and the negative electrode sheet feeding device 2, thereby realizing intermittent and efficient stacking processing.

[0069] First, the diaphragm laying mechanism lays the diaphragm from the side of the stacking table 4 close to the negative electrode sheet feeding device 2 to the side close to the positive electrode sheet feeding device 1, and the release drive mechanism cooperates to drive the rotating roller to rotate to realize the release of the diaphragm, so that the diaphragm is laid on the stacking table 4 under the action of the diaphragm laying mechanism, waiting for the stacking of the negative electrode sheet.

[0070] Then, driven by the rotary drive mechanism 13, the rotating frames of the positive electrode sheet feeding device 1 and the negative electrode sheet feeding device 2 rotate intermittently. When the storage seat 12 without electrode sheets rotates to the loading station, the positive electrode sheets and negative electrode sheets to be stacked are transported to the storage seat 12 of the corresponding rotating frame; when the storage seat 12 loaded with negative electrode sheets on the rotating frame of the negative electrode sheet feeding device 2 rotates to one side of the stacking platform 4, the telescopic drive mechanism 6 drives the entire rotating frame or drives the storage seat 12 loaded with negative electrode sheets to move to the side close to the stacking platform 4. When the storage seat 12 drives the negative electrode sheets to move After moving to the top of the diaphragm on the stacking table 4, the clamping device 14 clamps the negative electrode sheet and the diaphragm laid on the stacking table 4 on the side close to the positive electrode sheet feeding device 1, and drives the storage seat 12 to retract separately under the drive of the telescopic drive mechanism 6, thereby completing the stacking of the negative electrode sheet on the diaphragm; then, the rotary drive mechanism 13 drives the negative electrode sheet feeding device 2 to continue to rotate one grid, so that the next storage seat 12 loaded with negative electrode sheets corresponds to the stacking table 4, and the empty storage seat 12 is rotated to the loading station, and the negative electrode sheet is loaded on the empty storage seat 12 while waiting for the positive electrode sheet to be stacked.

[0071] Next, the diaphragm laying mechanism drives the diaphragm to be laid from the side close to the positive electrode sheet feeding device 1 to the side close to the negative electrode sheet feeding device 2, that is, the diaphragm is laid in a reverse folding and laying manner in a "Z"-shaped trajectory, so that the diaphragm is laid on the top of the aforementioned superimposed negative electrode sheet. During the laying process, the release drive mechanism cooperates to drive the rotating roller to release the diaphragm of a specified length.

[0072] After completing the stacking of a negative electrode sheet and the laying of the diaphragm, the telescopic drive mechanism 6 of the positive electrode sheet feeding device 1 drives the rotating frame or the storage seat 12 loaded with positive electrode sheets and corresponding to the stacking platform 4 to move toward the stacking platform 4, so that the storage seat 12 and the positive electrode sheet are located on the top surface of the diaphragm. At this time, the positive electrode sheet and diaphragm that have just been stacked and all the electrode sheets and diaphragms that have been stacked before are clamped together by the clamping device 14 to ensure that the position is fixed, and the storage seat 12 is retracted alone under the drive of the telescopic drive mechanism 6, so that the positive electrode sheet is stacked on the diaphragm; immediately afterwards, the rotating drive mechanism 13 drives the positive electrode sheet feeding device 1 to continue to rotate one grid, so that the next storage seat 12 loaded with positive electrode sheets corresponds to the stacking platform 4, and the empty storage seat 12 is rotated to the loading station, and the positive electrode sheet is loaded on the empty storage seat 12 while waiting for the next negative electrode sheet to be stacked.

[0073] In this way, the diaphragm laying mechanism is used to realize the rapid reversing and folding laying of the diaphragm, and the alternating extension and contraction of the positive electrode feeding device 1 and the negative electrode feeding device 2 are combined to feed the electrode sheets. At the same time, the diaphragm is released by the diaphragm conveying device 3 and the descending movement of the stacking table 4. The battery cell electrode sheets are stacked efficiently, accurately and stably in a rotating manner.

[0074] During the stacking process of the battery cell electrodes, after the stacking of a single battery cell electrode is completed, the tray loading mechanism transports the partition tray 15 to the stacking table 4. The partition tray 15 can be one or more. Before and after placing the partition tray 15, the diaphragm laying mechanism lays the diaphragm normally in the same way as when placing the positive and negative electrodes, that is, the partition tray 15 is also located between the laid diaphragms. The purpose of laying the above-mentioned partition tray 15 is: on the one hand, it can realize the continuous stacking of battery cell electrodes without pausing in the middle, which greatly improves production efficiency. Specifically, after completing the stacking of a battery cell electrode, there is no need to pause to take out the battery cell, but to place the partition tray 15 and continue stacking. After completing the stacking of several battery cell electrodes, the vertical drive mechanism 7 can be used to drive the stacking table 4 to move downward, and the multiple battery cells that have been stacked can be driven downward. At this time, the partition tray 15 under the battery cells being stacked can temporarily replace the stacking table 4 as a support base for stacking. At this time, an external mechanism can be set to support the partition tray 15, and the external mechanism drives the partition tray 15 to move downward to cooperate with the stacking action of the electrodes; and the several battery cells that have been stacked that are lowered with the stacking table 4 can be taken out, packaged, etc. through other mechanisms. After the action is completed, the stacking table 4 rises to the stacking position and resumes its role as a stacking support. The role of the base is that there is no need to pause to remove a single battery cell during the stacking process, which significantly improves production efficiency; on the other hand, by arranging a partition tray 15 between two adjacent battery cells, the diaphragm between the two adjacent battery cells can be divided at the partition tray 15, so that no damage is caused to the nearby pole pieces. For example, the diaphragm can be cut at the end of the partition tray 15 by laser cutting or tool cutting, thereby eliminating the risk of damage to the adjacent pole pieces during cutting; thirdly, by arranging the partition tray 15, since the partition tray 15 is also arranged between the diaphragms, a certain length of diaphragm can be stored at both ends of the battery cell. Therefore, after taking out the partition tray 15, for the battery cell that needs to be wrapped with a diaphragm, the diaphragm stored at both ends can be used for wrapping, which cleverly realizes the reservation of diaphragms at both ends of the battery cell, and by arranging different numbers of partition trays 15, diaphragms of different lengths can be reserved.

[0075] Furthermore, in order to support the separation tray 15 and transfer the stacked cells, this embodiment specifically discloses a support and transfer mechanism. Specifically, the support and transfer mechanism of this embodiment includes a transfer drive mechanism 8 that drives the stacking table 4 to move laterally, a support member 16, a support drive mechanism 18 that drives the support member 16 to extend and retract to support or release the separation tray 15, and a lifting drive mechanism 17 that drives the support member 16 to rise and fall. Two guide plates 11 are arranged opposite each other on the frame, and the stacking table 4 is arranged between the two guide plates 11. The power output member of the vertical drive mechanism 7 is connected to the bottom of the stacking table 4, and the transfer drive mechanism 8 is fixedly connected to the bracket of the vertical drive mechanism 7. When it is necessary to transfer the battery cells that have completed lamination without affecting the current lamination processing, the lifting drive mechanism 17 drives the supporting member 16 to move up and down to the corresponding separation tray 15, and drives the supporting member 16 to extend through the supporting drive mechanism 18 to support the separation tray 15 at that height, and then the vertical drive mechanism 7 drives the lamination table 4 to descend, so that all the battery cells below the supporting member 16 descend together with the lamination table 4 and are separated from the materials undergoing lamination above; then, the transfer drive mechanism 8 drives the vertical drive mechanism 7, the lamination table 4 and the battery cells to move horizontally, staggered with the pole pieces and diaphragms being laminated, and the battery cells are recycled on one side of the lamination station; after the battery cells are removed, the transfer drive mechanism 8 and the vertical drive mechanism 7 drive the lamination table 4 to reset, and the supporting drive mechanism 18 drives the supporting member 16 to retract, so that the separation tray 15 that is supporting the lamination processing material falls back onto the lamination table 4 to continue the lamination processing. In addition, a clamping mechanism 10 is provided on one side of the lamination station, through which the transferred and laminated battery cells are taken out. Of course, other taking-out devices such as a robot can also be used.

[0076] See also Figures 1-12 The high-efficiency battery cell stacking method of this embodiment includes the following steps:

[0077] (1) The diaphragm laying mechanism lays the diaphragm from one side of the lamination table 4 to the other side, and the release drive mechanism cooperates with the driving roller to rotate to realize the release of the diaphragm, so that the diaphragm is laid on the lamination table 4 under the action of the diaphragm laying mechanism, waiting for the lamination of the pole pieces;

[0078] (2) The rotary drive mechanism 13 drives the rotary frame of the positive electrode feeding device 1 or the negative electrode feeding device 2 to rotate, so that the electrode on the storage seat 12 corresponds to the stacking table 4; the telescopic drive mechanism 6 drives the rotary frame or the storage seat 12 to extend close to the stacking table 4, so that the storage seat 12 and the electrode move to the top of the diaphragm of the stacking table 4, and at this time the clamping device 14 clamps the diaphragm and the electrode on the top of the diaphragm; the telescopic drive mechanism 6 drives the rotary frame or the storage seat 12 to retract alone away from the stacking table 4, so that the storage seat 12 is separated from the electrode on the diaphragm; then the rotary drive mechanism 13 drives the rotary frame of the positive electrode feeding device 1 or the negative electrode feeding device 2 to rotate one grid, so that the next storage seat 12 loaded with electrode corresponds to the stacking table 4, waiting for the next electrode stacking; at the same time, the unloaded storage seat 12 corresponds to the electrode loading station to load the electrode;

[0079] (3) The diaphragm laying mechanism lays the next layer of diaphragm on the electrode sheet that has just been laminated; the vertical drive mechanism 7 drives the lamination table 4 to move downward so that the lamination table 4 corresponds to the electrode sheet on the storage seat 12 of the negative electrode sheet feeding device 2 or the positive electrode sheet feeding device 1;

[0080] (4) The rotary drive mechanism 13 drives the rotating frame of the negative electrode sheet feeding device 2 or the positive electrode sheet feeding device 1 to rotate, so that the electrode on the storage seat 12 corresponds to the stacking table 4; the telescopic drive mechanism 6 drives the rotating frame or the storage seat 12 to extend close to the stacking table 4, so that the storage seat 12 and the electrode move to the top of the diaphragm of the stacking table 4, at this time, the clamping device 14 clamps the diaphragm, the electrode on the top of the diaphragm, and all the electrode and diaphragms that have been stacked before; the telescopic drive mechanism 6 drives the rotating frame or the storage seat 12 to retract alone away from the stacking table 4, so that the storage seat 12 is separated from the electrode on the diaphragm; then the rotary drive mechanism 13 drives the rotating frame of the negative electrode sheet feeding device 2 or the positive electrode sheet feeding device 1 to rotate one grid, so that the next storage seat 12 loaded with electrode corresponds to the stacking table 4, waiting for the next electrode stacking; at the same time, the unloaded storage seat 12 corresponds to the electrode loading station to load the electrode;

[0081] (5) Repeat steps (1) to (4) until a specified number of positive and negative electrode sheets are stacked to form a battery cell;

[0082] (6) The tray loading mechanism lays a separation tray 15 on top of the diaphragm of the battery cell;

[0083] (7) Repeat steps (5) to (6) to achieve continuous and efficient processing and production of multiple battery cells.

[0084] Example 2

[0085] See also Figure 13-14The difference between this embodiment and embodiment 1 is that the rotating wheel 37 of the rotating frame is arranged in a polygonal shape. For example, the rotating wheel 37 is arranged in an equihexagonal shape, and six storage seats are correspondingly arranged on the rotating frame, and each storage seat is arranged one by one on the side 38 of the rotating wheel 37; at the same time, one end of each side 38 of the equihexagonal rotating wheel 37 is rotatably connected to the rotating wheel 37, and the other end can swing left and right. The telescopic driving mechanism in this embodiment is a rotating driving mechanism, and each side 38 corresponds to a rotating driving mechanism, which is used to separately drive each side 38 to rotate to realize the swing of the storage seat on the side 38.

[0086] During operation, in order to allow the wheel 37 sufficient rotation space during the electrode loading process, a lifting drive mechanism 39 is provided on the electrode loading device 40. During loading, the electrode is lifted upward so that the storage seat on the hexagonal wheel 37 can absorb the electrode. During the stacking process, after the diaphragm is laid on the stacking table 4, the rotating drive mechanism on the side 38 of the wheel 37 corresponding to the stacking table 4 drives the side 38 to rotate outward, causing the storage seat on the side 38 to swing outward, so that the electrode on the storage seat is transferred from the wheel 37 by swinging and stacked on the diaphragm on the stacking table 4, thereby completing the electrode stacking; finally, the rotating drive mechanism drives the side 38 to reset, and the rotating drive mechanism drives the wheel 37 to rotate one grid, so that continuous wheel 37-style electrode stacking can be carried out.

[0087] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A battery core stacking machine with a rotary feeding mechanism, characterized in that: It includes two electrode sheet feeding devices arranged opposite to each other, a stacking platform for stacking electrode sheets, and a diaphragm conveying device for conveying diaphragms. The two electrode sheet feeding devices are respectively a positive electrode sheet feeding device and a negative electrode sheet feeding device. The positive electrode sheet feeding device and the negative electrode sheet feeding device are respectively arranged on both sides of the diaphragm conveying device, and the stacking platform is arranged between the positive electrode sheet feeding device and the negative electrode sheet feeding device; wherein, The positive electrode sheet feeding device and the negative electrode sheet feeding device each include a rotating frame, a rotary drive mechanism for driving the rotating frame to rotate intermittently, and at least two storage seats provided on the rotating frame and used to load the electrode sheets, wherein the storage seats are arranged at equal intervals along the rotation direction of the rotating frame, and each storage seat is provided with a fixing assembly for fixing or loosening the electrode sheet; the positive electrode sheet feeding device and the negative electrode sheet feeding device are further provided with a telescopic drive mechanism for driving the rotating frame or the storage seats on the rotating frame to move closer to or away from the stacking table, thereby placing the electrode sheet on the stacking table; The diaphragm conveying device includes a rotating roller, a release driving mechanism for driving the rotating roller to rotate to release the diaphragm, and a diaphragm laying mechanism for pushing the diaphragm to be folded and laid on the laminating table in a reciprocating Z-shaped trajectory; The stacking table is vertically slidably mounted on a frame, and a vertical driving mechanism is provided on the frame for driving the stacking table to slide vertically so that the stacked electrode sheets sink downward. The stacking table is provided with a clamping device for clamping the diaphragm and the electrode sheets when laying the diaphragm and the electrode sheets. When the positive electrode sheet feeding device or the negative electrode sheet feeding device lays a electrode sheet, the clamping device clamps the electrode sheet and one end of the diaphragm, making it easier for the diaphragm laying mechanism to subsequently lay the next layer of diaphragm to achieve alternating stacking of positive and negative electrode sheets between the diaphragms. It also includes a tray loading mechanism for feeding a separation tray onto the stacking table after the pole pieces of a single battery cell are stacked. During the continuous stacking process of the battery cell pole pieces, the separation tray is located between two adjacent stacked battery cells.

2. The battery core stacking machine with a rotary feeding according to claim 1, characterized in that: The tray loading mechanism adopts a positive electrode sheet feeding device and / or a negative electrode sheet feeding device.

3. The battery core stacking machine with a rotary feeding according to claim 1, characterized in that: Along the moving direction of the positive electrode sheet and the negative electrode sheet, an electrode loading device is provided behind the positive electrode sheet feeding device and the negative electrode sheet feeding device; wherein, the electrode loading device includes an electrode sheet feeding mechanism and an electrode sheet conveying mechanism, and the electrode sheet feeding mechanism is arranged behind the electrode sheet conveying mechanism; the electrode sheet feeding mechanism includes an electrode sheet storage table for storing multiple electrode sheets to be superimposed, a suction component for sucking the electrode sheets, and a transport drive mechanism for driving the suction component to transfer between the electrode sheet storage table and the electrode sheet conveying mechanism, the suction component includes multiple vacuum suction cups, and the multiple vacuum suction cups are connected to the vacuum equipment; the electrode conveying mechanism includes a transmission belt and a transmission drive mechanism for driving the conveyor belt to operate, one end of the conveyor belt is docked with the electrode sheet storage table, and the other end of the conveyor belt is docked with the storage seat of the electrode feeding device.

4. The battery core stacking machine with a rotary wheel feeding according to claim 3, characterized in that: The pole piece conveying mechanism is provided with two groups, namely the first pole piece conveying mechanism and the second pole piece conveying mechanism; along the moving direction of the pole piece, the first pole piece conveying mechanism is arranged behind the second pole piece conveying mechanism; the frame is provided with an adjustment drive mechanism for driving the second pole piece conveying mechanism to move perpendicular to the moving direction of the pole piece.

5. The battery core stacking machine with a rotary wheel feeding according to claim 1, characterized in that: The fixing assembly on the storage seat includes a plurality of vacuum adsorption components, and the plurality of vacuum adsorption components are connected to the vacuum equipment.

6. The battery core stacking machine with a rotary wheel feeding according to claim 1, characterized in that: The clamping device includes two sets of telescopic pressing mechanisms, which are respectively arranged on the other two opposite sides of the stacking table; wherein each of the telescopic pressing mechanisms includes a pressing member and a pressing drive mechanism that drives the pressing member to move to tighten or loosen the pole pieces and diaphragms on the stacking table.

7. The battery core stacking machine with a rotary wheel feeding according to claim 6, characterized in that: The clamping drive mechanism includes a telescopic rod, a telescopic power source for driving the telescopic rod to telescopically move, a power block and a motion block. The telescopic rod is arranged obliquely downward along the telescopic direction of the telescopic rod; the telescopic power source is fixed on the frame, the power block is slidably arranged on the frame, the power block is fixedly connected to the telescopic rod, the motion block is slidably connected to the telescopic rod and a limit block is provided in front of the motion block for limiting the extreme position of the motion block moving forward, the motion block is arranged in front of the power block, and an elastic element is provided between the power block and the motion block; the clamping piece can be vertically slidably arranged on the motion block, and the clamping piece and the power block are rotatably connected to each other through a connecting rod.

8. The battery core stacking machine with a rotary wheel feeding according to claim 7, characterized in that: The motion block is provided with a vertical guide module, which includes a guide rail and a slider. The slider is fixedly connected to the motion block, and the guide rail is cooperatively connected to the slider and fixedly connected to the pressing member.

9. The battery core stacking machine with a rotary wheel feeding according to claim 8, characterized in that: The clamping member includes a pressing plate and a connecting rod, the pressing plate extends in the horizontal direction, one end of the connecting rod is connected to the rear end of the pressing plate, the other end of the connecting rod extends downward, and the connecting rod is fixedly connected to the guide rail; a connecting plate extending downward is provided on the power block, one end of the connecting rod is rotatably connected to the lower end of the connecting rod, and the other end of the connecting rod is rotatably connected to the lower end of the connecting plate.

10. A method for stacking battery cells using the battery cell stacking machine with rotary feeding according to any one of claims 2 to 9, characterized in that: The following steps are involved: (1) The diaphragm laying mechanism lays the diaphragm from one side of the lamination table to the other side, and the release drive mechanism cooperates with the driving roller to rotate to realize the release of the diaphragm, so that the diaphragm is laid on the lamination table under the action of the diaphragm laying mechanism, waiting for the lamination of the pole pieces; (2) The rotary drive mechanism drives the rotating frame of the positive electrode feeding device or the negative electrode feeding device to rotate, so that the electrode on the storage seat corresponds to the stacking table; the telescopic drive mechanism drives the rotating frame or the storage seat to extend close to the stacking table, so that the storage seat and the electrode move to the top of the diaphragm of the stacking table, and at this time the clamping device clamps the diaphragm and the electrode on the top of the diaphragm; the telescopic drive mechanism drives the rotating frame or the storage seat to retract separately from the stacking table, so that the storage seat and the electrode on the diaphragm are separated; then the rotary drive mechanism drives the rotating frame of the positive electrode feeding device or the negative electrode feeding device to rotate one grid, so that the next storage seat loaded with electrode corresponds to the stacking table, waiting for the next electrode stacking; at the same time, the unloaded storage seat corresponds to the electrode loading station, and the electrode is loaded; (3) The diaphragm laying mechanism lays the next layer of diaphragm on the electrode sheet that has just been laminated; the vertical drive mechanism drives the lamination table to move downward so that the lamination table corresponds to the electrode sheet on the storage seat of the negative electrode sheet feeding device or the positive electrode sheet feeding device; (4) The rotary drive mechanism drives the rotating frame of the negative electrode sheet feeding device or the positive electrode sheet feeding device to rotate, so that the electrode sheet on the storage seat corresponds to the stacking table; the telescopic drive mechanism drives the rotating frame or the storage seat to extend close to the stacking table, so that the storage seat and the electrode sheet move to the top of the diaphragm of the stacking table, at this time, the clamping device clamps the diaphragm, the electrode sheet on the top of the diaphragm, and all the electrode sheets and diaphragms that have been stacked before; the telescopic drive mechanism drives the rotating frame or the storage seat to retract separately from the stacking table, so that the storage seat and the electrode sheet on the diaphragm are separated; then the rotary drive mechanism drives the rotating frame of the negative electrode sheet feeding device or the positive electrode sheet feeding device to rotate one grid, so that the next storage seat loaded with electrode sheets corresponds to the stacking table, waiting for the next electrode sheet stacking; at the same time, the unloaded storage seat corresponds to the electrode sheet loading station, and the electrode sheet is loaded; (5) Repeat steps (1) to (4) until a specified number of positive and negative electrode sheets are stacked to form a battery cell. (6) The tray loading mechanism lays a partition tray on top of the diaphragm of the battery cell; (7) Repeat steps (5) to (6) to achieve continuous and efficient processing and production of multiple battery cells.

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