Laminating machine

Abstract

The utility model provides a lamination machine, which relates to the technical field of battery lamination and comprises a lamination device, pole pieces and diaphragms are laminated to form a laminated core, and the cut ends of the diaphragms are positioned on the side edges of the laminated core; the side rubberizing device is used for tightly adhering the cut end of the diaphragm to the side edge of the laminated core; the hot-pressing device is used for performing hot-pressing molding on the laminated core tightly attached to the diaphragm; by arranging a side rubberizing device and a hot pressing device, the side rubberizing device comprises a rubber frame, an adhesive tape disc, a cutter and a rubber clamping head, the side rubberizing device cuts off an adhesive tape of the adhesive tape disc through the cutter and then pulls the adhesive tape to the rubber clamping head, the rubber frame drives the rubber clamping head to move, and the tail end of an unrestrained diaphragm on the side edge of a stacked core is tightly attached through the rubber clamping head, so that the tail end of the diaphragm is prevented from loosening; and the stacked core of the clamping frame is transferred to the hot-pressing device through the hot-pressing feeding and discharging mechanical arm to be subjected to hot-pressing forming, so that the stacked core is smoother, and the tail end of the diaphragm is tightly attached and fixed to the stacked core through the adhesive tape, so that the tail end of the diaphragm does not have the problems of loosening and edge folding when the stacked core is subjected to hot pressing.

Description

Technical Field

[0001] The utility model relates to the technical field of battery lamination, in particular to a lamination machine. Background Art

[0002] The stacking machine is mainly used to stack the positive and negative electrodes of battery cells or battery packs together to complete the stacking assembly of the battery. The positive and negative electrodes are stacked in a certain order and position, and the positive and negative electrodes are accurately positioned by the positioning device. Then, the stacking head will apply a certain pressure to press the positive and negative electrodes tightly to ensure the stability and connectivity of the battery.

[0003] In the prior art, the process sequence generally adopted by the stacking machine is as follows: first, the electrode is loaded through a spring clip, and the electrode is corrected and transported to the stacking table. At the same time, after the diaphragm is unwound, the electrode is stacked with the diaphragm to obtain a stacked core, and the stacked core is subjected to hot pressing / thickness measurement / short circuit test. Finally, the stacked core is unloaded after QR code gluing and weighing. However, during the stacking process, the tail end of the diaphragm is in an unconstrained state after the diaphragm is cut off. If the diaphragm is subjected to the subsequent hot pressing step at this time, the diaphragm is in an unconstrained state and shrinks when heated. When the tail end of the diaphragm is heated and shrunk, looseness and folding problems will occur, thereby causing defects in the process. Utility Model Content

[0004] In order to solve the above technical problems, the utility model solves the problem that the tail end of the diaphragm is in a non-constrained state before the hot pressing step of the stacked core, so as to avoid the problem that the tail end of the diaphragm is loose and folded due to hot pressing. The specific technical solution is as follows:

[0005] A laminating machine comprises a laminating device for laminating pole pieces and diaphragms to form a stacked core, wherein the cut end of the diaphragm is located on the side of the stacked core; a side gluing device for pressing the cut end of the diaphragm against the side of the stacked core; and a hot pressing device for hot pressing the stacked core with the diaphragm in close contact.

[0006] Preferably, the lamination device comprises a lamination table, an unwinding roller and a hot cutter, the diaphragm of the unwinding roller and the pole pieces of the lamination table are cross-laminated to form a stacked core, and the hot cutter is used to cut the diaphragm.

[0007] Preferably, the side adhesive device uses adhesive tape to attach the tail end of the diaphragm to the side of the stacked core.

[0008] Preferably, the side glue sticking device comprises a tape reel, a cutter and a glue clamping head. The cutter cuts the tape of the tape reel and then pulls the tape to the glue clamping head. The tape of the glue clamping head sticks the diaphragm on the side of the stacked core tightly.

[0009] It can be seen from the above technical scheme that the utility model is equipped with a side gluing device and a hot pressing device. The side gluing device includes a glue rack, a tape reel, a cutter and a glue clamping head. The side gluing device cuts the tape of the tape reel by the cutter and pulls it to the glue clamping head. The glue rack drives the glue clamping head to move, and the unconstrained diaphragm tail end on the side of the stacked core is tightly attached by the glue clamping head to avoid loosening of the tail end of the diaphragm. Then, the stacked core of the clamping rack is transferred to the hot pressing device for hot pressing molding by a hot pressing loading and unloading robot, so that the stacked core is flatter. Because the tail end of the diaphragm is tightly fixed to the stacked core by the tape, the tail end of the diaphragm will not become loose or folded due to hot pressing of the stacked core, thereby avoiding defects in process processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0011] Figure 2 It is a schematic diagram of the structure of the side glue device of the utility model.

[0012] In the figure: 10, stacking device; 11, stacking table; 12, unwinding roller; 20, side gluing device; 21, glue rack; 22, tape reel; 23, cutter; 24, glue clamping head; 30, hot pressing device; 40, stacking off-line robot; 50, clip loading device; 60, pole piece handling robot; 70, pole piece correction device; 80, weighing table; 90, clamping frame; 100, hot pressing loading and unloading robot; 110, thickness measurement / short circuit test device; 120, core stacking off-line device; 130, QR code gluing device; 140, maintenance channel. DETAILED DESCRIPTION

[0013] The following is a detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments. Before describing in detail the technical solutions of each embodiment of the present invention, the nouns and terms involved are explained. In this specification, components with the same name or the same number represent similar or identical structures and are only for illustrative purposes.

[0014] like Figure 1 and Figure 2As shown, a laminating machine includes a laminating device 10, a side gluing device 20 and a hot pressing device 30. The laminating device 10 is used to stack the pole piece and the diaphragm to form a stacked core, the cut end of the diaphragm is located on the side of the stacked core, the side gluing device 20 is used to press the cut end of the diaphragm against the side of the stacked core, and the hot pressing device 30 is used to hot press the stacked core with the diaphragm in close contact; wherein the laminating device 10 includes an unwinding roller 12 and a laminating table 11, the laminating table 11 is fixedly mounted on the frame of the laminating machine, the unwinding roller 12 is rotatably mounted on the slider of the laminating table 11, the unwinding roller 12 is provided with a rolled diaphragm, and one side of the diaphragm is sticky, which is convenient for the pole piece and the diaphragm to be pressed. Bonding, the slider of the lamination platform 11 is also rotatably installed with a guide wheel and a slidably installed with a tension wheel. The slider moves back and forth relative to the lamination platform 11, driving the diaphragm and the pole piece in the unwinding roller 12 to stack and form a Z shape. A hot cutter 23 is also provided in the lamination device 10. The hot cutter 23 is rotatably installed on the lamination platform 11. When the pole piece and the diaphragm are stacked, a stacked core is formed. At this time, the hot cutter 23 rotates relative to the lamination platform 11 to cut off the diaphragm. The tail of the cut diaphragm is located on the side of the pole piece. It is preferred to place the cut end of the diaphragm at half the thickness of the pole piece, which can maintain the tension and stability of the diaphragm, and also allow the current to pass through the entire diaphragm evenly. In this way, it can be avoided that the current is excessively concentrated in a certain part due to the different proportions of the tail of the diaphragm, causing uneven local battery reaction and inconsistent capacity.

[0015] As an implementation method in this embodiment, a lamination offline robot 40 and a clamping frame 90 are also arranged between the lamination device 10 and the side gluing device 20. The lamination offline robot 40 is fixedly installed on the frame of the lamination machine, and the clamping frame 90 is fixedly installed on the frame of the lamination machine. The lamination offline robot 40 transfers the stacked core at the lamination table 11 to the clamping frame 90, and positions the stacked core by the clamping claws of the clamping frame 90. The side gluing device 20 includes a glue rack 21, a tape reel 22, a cutter 23 and a glue clamping head 24, wherein the glue rack 21 is installed on the frame of the lamination machine through a slide rail, and the tape reel 22, the cutter 23 and the glue clamping head The heads 24 are all arranged on the glue rack 21 of the side glue sticking device 20. The glue rack 21 can drive the tape reel 22, the cutter 23 and the glue clamping head 24 to move back and forth. The tape reel 22 is rotatably connected to the glue rack 21. The tape reel 22 is used to place the tape. The cutter 23 is slidably connected to the glue rack 21. The cutter 23 is used to cut the tape into sections. The cutter 23 cuts the tape on the tape reel 22 and then pulls it to the glue clamping head 24. The glue clamping head 24 and the glue rack 21 are fixed to each other. The glue rack 21 drives the glue clamping head 24 to move, and fixes the broken edge of the diaphragm on the side of the stacked core tightly through the tape to avoid the diaphragm on the side of the stacked core being in an unconstrained state and easily deviating.

[0016] As an implementation method in this embodiment, the hot pressing device 30 includes a heating plate, and the pressure plate is slidably installed on the frame of the stacking machine. The heating plate hot-presses the stacked cores that are tightly attached to the diaphragm. At the same time, a sensor is also installed on the heating plate, which can detect the pressure and temperature of the heating plate, such as a pressure sensor and a temperature sensor. The heating plate heats and pressurizes the glue between the electrode and the diaphragm to form a bond, and the stacked core is smoother. The sensor detects the temperature and pressure changes of the heating plate in real time to facilitate the subsequent temperature and pressure adjustments required for the stacking.

[0017] As an implementation method in this embodiment, a clip loading device 50 and a pole piece handling robot 60 are also fixedly installed on the frame of the stacking machine. The clip loading device 50 is used to drive the pole piece to realize loading. It is preferred to use a conveyor belt to drive the pole piece to the range of the pole piece handling robot 60 to pick up the material. The pole piece handling robot 60 transfers the pole piece at the clip loading device 50 to the stacking table 11 to facilitate the stacking of the pole piece and the diaphragm. At the same time, a pole piece correction device 70 is also arranged between the clip loading device 50 and the stacking device 10. The pole piece correction device 70 includes a correction table fixedly installed on the frame of the stacking machine. The pole piece handling robot 60 transfers the clip The pole piece of the feeding device 50 is first transferred to the correction table of the pole piece correction device 70, and the pole piece correction device 70 corrects the pole piece to ensure that the pole piece and the stacking table 11 are flush with each other. Among them, the pole piece correction device 70 can adopt one of mechanical correction, visual correction, laser correction and automatic correction, all of which belong to the prior art. The pole piece handling robot 60 preferably adopts a double-motor linear motor. The two movers at one end of the double-motor linear motor can transfer the pole piece at the clip feeding device 50 to the correction table, and the two movers at the other end of the double-motor linear motor transfer the pole piece that has been corrected on the correction table to the stacking table 11 to supply the pole piece for the stacking work.

[0018] As an implementation method in this embodiment, it also includes a detection device, wherein the detection device includes a thickness measurement / short circuit test device 110 and a weighing platform 80. The thickness measurement / short circuit test device 110 and the sensor or instrument used for weighing are fixedly installed on the frame of the stacking machine. The thickness measurement / short circuit test device 110 can use one of a thickness measurement sensor, a laser thickness gauge, and an ultrasonic thickness gauge to detect the thickness of the stacked core completed by hot pressing; the short circuit detection can use a four-wire tester or a resistance tester to detect the stacked core, and detect the short circuit of the stacked core by applying voltage or current; the weighing platform 80 can use a weighing sensor to detect the stacked core; the detected data can be transmitted to an external controller through wires to facilitate data processing and collection.

[0019] As an implementation method in this embodiment, a core stacking off-line device 120 and a two-dimensional code gluing device 130 fixedly mounted on the stacking machine frame are also provided. The core stacking off-line device 120 is used to remove the stacked cores that have been inspected, and it includes NG waste discharge, which is used to discard the unqualified or high-unqualified cores to achieve classification. The two-dimensional code gluing device 130 is used to paste the printed two-dimensional code label to the battery stack; it also includes a hot pressing loading and unloading manipulator 100 fixedly mounted on the stacking machine frame, and a hot pressing loading and unloading machine The hand 100 drives the core stack to be transported through the side gluing device 20, that is, the cut part of the diaphragm is located on the side of the electrode and is fixed with tape. The hot pressing loading and unloading robot 100 drives the core stack to pass through the hot pressing device 30, the thickness measurement / short circuit testing device 110, the QR code gluing device 130 and the weighing platform 80 in sequence, and finally transports the tested core stack to the core stack offline device 120; a maintenance channel 140 is also provided on the stacking machine, which can be used to maintain the frequently maintained positions. The above belongs to the prior art and will not be repeated here.

[0020] When the utility model is working, the pole piece is loaded through the spring clip loading device 50, and the pole piece is transferred to the correction table of the pole piece correction device 70 by the pole piece handling robot 60. After the pole piece is corrected by the pole piece correction device 70, the pole piece is transferred to the stacking table 11 by the pole piece handling robot 60 again. The slider and the unwinding roller 12 of the stacking device 10 drive the pole piece and the diaphragm to form a Z-shaped stack. After the stacking is completed, the hot cutter 23 is rotated so that after the diaphragm is cut, the cut end of the diaphragm is located at the side of the pole piece. The stacking off-line robot 40 transfers the stacked core after the diaphragm is cut to the clamping frame 90, and the clamping frame 90 clamps and fixes the stacked core. The side glue device 20 uses the cutter 23 to cut the tape of the tape reel 22 After cutting, it is pulled to the glue clamping head 24, and the unconstrained tail end of the diaphragm on the side of the core stack is pressed tightly by the glue clamping head 24 to prevent the tail end of the diaphragm from being loose. Secondly, the core stack of the clamping frame 90 is transferred to the hot pressing device 30 for hot pressing molding by the hot pressing loading and unloading robot 100, so that the core stack is flatter. Because the tail end of the diaphragm is tightly fixed to the core stack by tape, the tail end of the diaphragm will not be loose or folded due to hot pressing of the core stack, thereby avoiding defects in process processing. Finally, the hot pressing loading and unloading robot 100 drives the hot-pressed core stack to be tested in turn by the thickness measurement / short circuit test device 110, the weighing platform 80, the QR code gluing device 130 and the core stack unloading device 120, and the molded core stack is inspected, coded and unloaded.

[0021] The above-described embodiments are merely descriptions of preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A lamination machine, characterized in that: include: A lamination device (10) for laminating the pole pieces and the diaphragms to form a stacked core, wherein the cut end of the diaphragms is located at the side of the stacked core; A side gluing device (20) is used to closely adhere the cut end of the diaphragm to the side edge of the stacked core; A hot pressing device (30) is used to hot press the core stack with the diaphragm in close contact.

2. The laminating machine according to claim 1, characterized in that: The lamination device (10) comprises a lamination platform (11), an unwinding roller (12) and a hot cutter (23); the diaphragm of the unwinding roller (12) and the pole piece of the lamination platform (11) are cross-laminated to form a stacked core, and the hot cutter (23) is used to cut the diaphragm.

3. The laminating machine according to claim 2, characterized in that: It also includes a lamination off-line robot (40), which transfers the stacked cores on the lamination platform (11) to the side gluing device (20).

4. The laminating machine according to claim 1, characterized in that: The side adhesive device (20) uses adhesive tape to attach the tail end of the diaphragm to the side of the stacked core.

5. The laminating machine according to claim 1 or 4, characterized in that: The side adhesive bonding device (20) comprises an adhesive tape reel (22), a cutter (23) and an adhesive clamping head (24); the cutter (23) cuts the adhesive tape on the adhesive tape reel (22) and then pulls the tape to the adhesive clamping head (24); the adhesive tape at the adhesive clamping head (24) tightly bonds the diaphragm on the side of the stacked core.

6. The laminating machine according to claim 1, characterized in that: The hot pressing device (30) comprises a heating plate, and the heating plate hot presses the stacked cores tightly attached to the diaphragm to form a bond by glue.

7. The laminating machine according to claim 1, characterized in that: It also includes a detection device arranged after the hot pressing device (30), and the detection device includes at least one of thickness measurement, short circuit and weighing.

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