A feeding device for a semi-automatic winding machine for lithium battery electrodes

Abstract

The present invention discloses a feeding device of a semi-automatic winding machine for lithium battery electrodes, including a placement slot, a support plate, a winding device, a guide plate and a feeding mechanism. The placement slot is fixed on the side elevation of the frame, and the support plate is respectively arranged on both sides of the bottom surface of one end of the placement slot through a support plate lifting mechanism. The winding device includes a winding motor, an active suction cylinder, a driven suction cylinder, a conveyor belt and a suction port. A guide plate is arranged below, and a feeding mechanism is arranged below the guide plate, including a gear motor, a gear, a rack and a feeding suction strip. The rack is fixedly installed below the feeding suction strip. There is a slide groove in the middle of the guide plate, and the feeding suction strip is embedded in the slide groove. The present invention uses a roller-type winding device with a suction port to adsorb the pole piece for unloading, and then the gear rack mechanism drives the suction strip to adsorb the pole piece and send it to the pressure roller. The whole device has a simple structure and a small volume, and can replace manual feeding, greatly improving work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery winding, and in particular to a feeding device of a semi-automatic winding machine for lithium battery electrodes. Background Art

[0002] Lithium-ion batteries are mainly composed of four parts: positive electrode, negative electrode, non-aqueous electrolyte and separator. In the manufacturing process of lithium batteries, the middle process is mainly to complete the molding of the battery. The main process flow includes sheet making, pole piece winding, die cutting, cell winding molding and lamination molding. For the cell winding molding process, semi-automatic winding machines are commonly used. Semi-automatic winding machines are special production equipment for round lithium battery cells. They are used to alternately wind the single-piece positive and negative pole pieces with two layers of continuous separators in turn and bond them with tape to form a cell. Its characteristics are that it is suitable for a wide range of products, simple operation, high winding accuracy, good cost performance, and is particularly suitable for large-scale production of lithium battery cells.

[0003] The semi-automatic winding machines currently on the market can automatically wind, automatically change needles, automatically stick termination tapes and automatically unload materials, but they need to manually load the electrodes. Each machine requires an operator. The diaphragm is installed in the machine, and then the positive and negative electrodes are manually placed. The two hands press the two electrodes respectively, and then the foot steps on the switch to start automatic winding. This winding method is fast and beautiful, but the labor intensity is still very high. Summary of the invention

[0004] The purpose of the present invention is to improve the existing semi-automatic winding machine, solve the problem of high labor intensity, add a feeding device for the semi-automatic winding machine of lithium battery electrodes, and automatically transport the pole pieces into the winding machine through the machine, which greatly reduces the settings of operators.

[0005] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0006] A feeding device of a semi-automatic winding machine for lithium battery electrodes, comprising a frame, a positive electrode feeding device, an upper diaphragm feeding mechanism, a negative electrode feeding device, a lower diaphragm feeding mechanism, a pressing roller and a winding machine, wherein the positive electrode feeding device, the upper diaphragm feeding mechanism, the negative electrode feeding device and the lower diaphragm feeding mechanism are sequentially installed on the side elevation of the frame from top to bottom;

[0007] The positive electrode feeding device and the negative electrode feeding device have the same structure, including a placement slot, a support plate, a winding device, a guide plate and a feeding mechanism. The placement slot is fixed on the side elevation of the frame and is open at the top and bottom. The support plate is L-shaped and has two pieces, which are respectively arranged on both sides of the bottom surface of one end of the placement slot through a support plate lifting mechanism. The winding device is arranged below the placement slot, including a winding motor, an active suction cylinder, a driven suction cylinder, a conveyor belt and a suction port. The circumferential surfaces of the active suction cylinder and the driven suction cylinder are provided with suction ports, and suction pipelines are arranged inside and connected to an external vacuum pump. The conveyor belt is wrapped around the active suction cylinder and the driven suction cylinder, and the suction port is arranged on the conveyor belt. The outside of the winding device is sealed except for the suction port, and a guide plate is arranged below the winding device.

[0008] A feeding mechanism is provided under the guide plate, and the feeding mechanism includes a gear motor, a gear, a rack and a feeding suction strip. The gear motor is a forward and reverse stepping motor, and the motor output shaft is connected to the gear, and the gear is meshed with the rack. The rack is fixedly installed under the feeding suction strip. A slide groove is provided in the middle of the guide plate, and the feeding suction strip is embedded in the slide groove.

[0009] Preferably, the front end of the feeding suction bar is suspended in the air, and the rear end is fixedly mounted on the rack.

[0010] Preferably, the feeding suction strip is slightly shorter than the pole piece.

[0011] Preferably, limit sensing devices are provided at both ends of the rack.

[0012] Preferably, the support plate lifting mechanism and the gear motor of the positive electrode feeding device and the negative electrode feeding device are both controlled to move synchronously through an external PLC control system.

[0013] Preferably, the winding motor and the vacuum pump are connected to an external PLC control system, and the feeding mechanism completes feeding once and returns to its original position each time the conveyor belt of the winding motor rotates one circle.

[0014] Preferably, the pallet lifting mechanism is a cylinder.

[0015] The present invention uses a roller-type winding device with a suction port to adsorb the pole piece for unloading, and then the gear rack mechanism drives the suction strip to adsorb the pole piece and send it to the pressing roller. The whole device has a simple structure and a small size, can replace manual feeding, and greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of the present invention.

[0017] Figure 2 It is the front view of the present invention.

[0018] Figure 3It is a schematic diagram of the positive electrode feeding device.

[0019] Figure 4 It is a cross-sectional view of the guide plate and the feed suction strip.

[0020] In the figure, 1 is a frame, 2 is a positive electrode feeding device, 3 is an upper diaphragm feeding mechanism, 4 is a negative electrode feeding device, 5 is a lower diaphragm feeding mechanism, 6 is a pressure roller, 21 is a placement groove, 22 is a support plate, 23 is a winding device, 24 is a guide plate, 25 is a feeding mechanism, 221 is a support plate lifting mechanism, 231 is a winding motor, 232 is an active suction cylinder, 233 is a driven suction cylinder, 234 is a conveyor belt, 235 is a suction port, 241 is a slide, 251 is a gear motor, 252 is a gear, 253 is a rack, 254 is a feeding suction strip, 255 is a suction cup, and 256 is a limit sensing device. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but the embodiments of the present invention are not limited thereto.

[0022] Figures 1 to 4 It is a preferred embodiment of the present invention, comprising a frame 1 (only the side elevation is shown in the figure), a positive electrode feeding device 2, an upper diaphragm feeding mechanism 3, a negative electrode feeding device 4, a lower diaphragm feeding mechanism 5, and a pressing roller 6. The positive electrode feeding device 2, the upper diaphragm feeding mechanism 3, the negative electrode feeding device 4 and the lower diaphragm feeding mechanism 5 are sequentially installed on the side elevation of the frame 1 from top to bottom. The positive electrode feeding device 2 conveys the positive electrode sheet A, the negative electrode feeding device 4 conveys the negative electrode sheet, the upper diaphragm feeding mechanism 3 and the lower diaphragm feeding mechanism 5 convey the diaphragm, and the positive electrode sheet, diaphragm, negative electrode sheet and diaphragm are conveyed to the pressing roller 6 in order from top to bottom for pressing. After pressing, they are driven by an external winding machine (not shown in the figure) and wound by the winding machine.

[0023] The positive electrode feeding device 2 and the negative electrode feeding device 4 have the same structure, and both include a placement slot 21, a support plate 22, a winding device 23, a guide plate 24 and a feeding mechanism 25. The placement slot 21 is fixed on the side elevation of the frame 1, and is open at the top and bottom. The support plate 22 is L-shaped and has two pieces, which are respectively arranged on both sides of the bottom surface of one end of the placement slot 21 through a support plate lifting mechanism 221. The support plate lifting mechanism 221 can be a telescopic structure such as a cylinder, a crank slider mechanism or a worm gear mechanism. In this embodiment, a cylinder is used, and a cylinder seat is installed on the end surface of the placement slot 21. The piston rod connects the two support plates 22 to drive the support plates 22 to move up and down. The winding and feeding device 23 is arranged below the placement groove 21, and includes a winding and feeding motor 231, an active suction cylinder 232, a driven suction cylinder 233, a conveyor belt 234 and a suction port 235. Suction ports (not shown in the figure) are provided on the circumferential surfaces of the active suction cylinder 232 and the driven suction cylinder 233, and a suction pipeline is provided inside and connected to an external vacuum pump (not shown in the figure). The conveyor belt 234 is wrapped around the active suction cylinder 232 and the driven suction cylinder 233, and rotates with the active suction cylinder 232. There are multiple suction ports 235, which are arranged on the conveyor belt 234. Except for the suction port 235, the rest of the outer side of the winding and feeding device are sealed. In the initial state, the suction ports 235 are all on the upper conveyor belt 234. A guide plate 24 is provided below the coiling device 23. The electrode A is placed in the placement slot 21. The support plate 22 drives the electrode A to move downward through the support plate lifting mechanism 221 and descends to the top of the coiling device 23. The vacuum pump is started, and the suction port 235 absorbs the lowest electrode A. The motor drives the active suction cylinder 232 to rotate, and the electrode A is transferred to the bottom through the conveyor belt 234. The upper electrode does not move due to friction. The vacuum pump is turned off, the suction port 235 is released, and the electrode A falls onto the guide plate 24, and the support plate 22 rises back to its original position. The diameter of the suction port 235 is smaller than the distance between the two support plates 22.

[0024] The guide plate 24 is fixed on the frame 1, and a feeding mechanism 25 is provided below. The feeding mechanism 25 includes a gear motor 251, a gear 252, a rack 253 and a feeding suction strip 254. The gear motor 251 is fixed on the frame 1 and is a forward and reverse stepping motor. The motor output shaft is connected to the gear 252, and the gear 252 is meshed with the rack 253. The rack is fixedly installed below the feeding suction strip 254. There is a chute 241 in the middle of the guide plate 24. The feeding suction strip 254 is embedded in the chute 241 and is driven by the rack 253 to slide in the chute 241. The pole piece A falls from the conveyor belt 234 to the guide plate 24, and the feeding suction strip 254 sucks the pole piece A. The gear motor 251 drives the rack 253 to feed the pole piece A into the pressure roller 6.

[0025] A plurality of suction cups 255 are provided on the feeding suction strip 254, which are connected to an external vacuum pump (not shown in the figure) through a pipeline. The rack 253 and the feeding suction strip 254 are connected by a connecting block, and the connecting block is arranged between the two suction cups 255. As shown in the figure, the front end of the feeding suction strip 254 (the end close to the pressure roller 6) is suspended in the air, and the rear end is fixedly mounted on the rack 253. In the initial state, the gear 252 is located in the middle of the rack 253. After the pole piece A falls, the gear rotates to drive the rack forward. In order to ensure that the pole piece is delivered to the pressure roller 6 without obstacles, the feeding suction strip 254 is slightly shorter than the pole piece A.

[0026] The rack 253 is provided with limit sensing devices 256 at both ends. When the rack 253 moves forward and backward until the gear 252 hits the limit sensing device 256, the gear motor 251 stops rotating. The pallet lifting mechanism 221 and the gear motor 251 of the positive electrode feeding device 2 and the negative electrode feeding device 4 are controlled by the external PLC control system to synchronize the actions, ensuring that the positive electrode sheet and the negative electrode sheet are simultaneously fed into the pressing roller 6 for pressing. The winding motor 231 and the vacuum pump are also connected to the external PLC control system. By adjusting the motor speed, it is ensured that the feeding mechanism 25 completes one feeding and returns to its position every time the conveyor belt 234 rotates one circle.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A feeding device for a semi-automatic winding machine for lithium battery electrodes, characterized in that: It comprises a frame, a positive electrode feeding device, an upper diaphragm feeding mechanism, a negative electrode feeding device, a lower diaphragm feeding mechanism, a pressing roller and a winding machine, wherein the positive electrode feeding device, the upper diaphragm feeding mechanism, the negative electrode feeding device and the lower diaphragm feeding mechanism are sequentially installed on the side elevation of the frame from top to bottom; The positive electrode feeding device and the negative electrode feeding device have the same structure, including a placement slot, a support plate, a winding device, a guide plate and a feeding mechanism. The placement slot is fixed on the side elevation of the frame and is open at the top and bottom. The support plate is L-shaped and has two pieces, which are respectively arranged on both sides of the bottom surface of one end of the placement slot through a support plate lifting mechanism. The winding device is arranged below the placement slot, including a winding motor, an active suction cylinder, a driven suction cylinder, a conveyor belt and a suction port. The circumferential surfaces of the active suction cylinder and the driven suction cylinder are provided with suction ports, and suction pipelines are arranged inside and connected to an external vacuum pump. The conveyor belt is wrapped around the active suction cylinder and the driven suction cylinder, and the suction port is arranged on the conveyor belt. The outside of the winding device is sealed except for the suction port, and a guide plate is arranged below the winding device. A feeding mechanism is provided below the guide plate, and the feeding mechanism includes a gear motor, a gear, a rack and a feeding suction strip. The gear motor is a forward and reverse stepping motor, and the motor output shaft is connected to the gear, and the gear is meshed with the rack. The rack is fixedly installed below the feeding suction strip. A slide groove is provided in the middle of the guide plate, and the feeding suction strip is embedded in the slide groove. The front end of the feeding suction bar is suspended in the air, and the rear end is fixedly mounted on the rack; Limit sensing devices are provided at both ends of the rack.

2. The feeding device of the semi-automatic winding machine for lithium battery electrodes according to claim 1, characterized in that: The feeding suction strip is slightly shorter than the pole piece.

3. The feeding device of the semi-automatic winding machine for lithium battery electrodes according to claim 1 is characterized in that: The support plate lifting mechanism and the gear motor of the positive electrode feeding device and the negative electrode feeding device are both controlled to move synchronously through an external PLC control system.

4. The feeding device of the semi-automatic winding machine for lithium battery electrodes according to claim 1, characterized in that: The winding motor and the vacuum pump are connected to an external PLC control system. Each time the conveyor belt of the winding motor rotates one circle, the feeding mechanism completes one feeding and returns to its position.

5. The feeding device of the semi-automatic winding machine for lithium battery electrodes according to claim 1, characterized in that: The support plate lifting mechanism is a cylinder.

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