Liquid injection device for lithium battery production

Abstract

The invention belongs to the field of lithium battery production equipment, and particularly relates to a liquid injection device for lithium battery production, which comprises a rack, one side of the upper end of the rack is fixedly connected with a frame body, the two ends of one side of the frame body are fixedly connected with sliding rods I, the sliding rods I are slidably connected with a lifting plate, one side of the lower end surface of the lifting plate is fixedly connected with a limiting plate, and the limiting plate is fixedly connected with the limiting plate. A plurality of sliding blocks are connected to the limiting plate in a sliding mode, an adjusting column is fixedly connected to one side of each sliding block, and a liquid injection head is fixedly connected to one end of each adjusting column. By utilizing the filling mechanism for the gap of the liquid injection disc, when the liquid injection head completes one-time liquid injection, the liquid injection head and the liquid injection disc generate relative displacement and are aligned with the other row of lithium batteries, the gap between the two rows of lithium batteries can be filled through the liquid collection plate and the extension plate, so that the phenomenon that the liquid injection head and the liquid injection disc generate relative displacement and the liquid injection head is aligned with the other row of lithium batteries is avoided; and the residual electrolyte at the end part of the liquid injection head drops to the surface of the liquid injection disc.

Description

Technical Field

[0001] The invention belongs to the field of lithium battery production equipment, in particular to a liquid injection device for lithium battery production. Background Art

[0002] Lithium batteries are batteries that use lithium alloy metal oxides as positive electrode materials, graphite as negative electrode materials, and non-aqueous electrolytes. During the production process of lithium batteries, the electrolyte needs to be filled inside the lithium battery to ensure the normal charge and discharge performance of the battery.

[0003] In the prior art, lithium batteries that need to be injected are usually arranged in multiple rows and placed on an injection tray at equal intervals, and the injection tray is placed on a conveyor belt, which is driven by the conveyor belt to move the injection tray, and the lithium batteries in each row are injected in turn using an injection head. Although this method can improve the injection efficiency, since each row of lithium batteries has a gap, when a row of lithium batteries is injected and the injection tray is driven to move so that the injection head is aimed at the next row of lithium batteries, the liquid outlet of the injection head will be aimed at the gap between the two rows of lithium batteries for a period of time. Under normal circumstances, there will be residual electrolyte at the end of the injection head after each injection. When the liquid outlet of the injection head is aimed at the gap between the two rows of lithium batteries, the electrolyte may drip onto the injection tray, which will not only easily cause the injection tray to be contaminated and affect subsequent use, but also lead to waste of electrolyte. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the present invention proposes a liquid injection device for lithium battery production.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a liquid injection device for lithium battery production, comprising a frame, a conveyor belt is arranged on the frame, a frame body is fixedly connected to one side of the upper end of the frame, two ends of one side of the frame body are fixedly connected to a slide bar, a lifting plate is slidably connected to the slide bar, a limit plate is fixedly connected to one side of the lower end surface of the lifting plate, a plurality of sliders are slidably connected to the limit plate, an adjusting column is fixedly connected to one side of the slider, and a liquid injection head is fixedly connected to one end of the adjusting column, and a liquid injection plate gap filling mechanism is also arranged on the frame to prevent electrolyte from dripping onto the liquid injection plate; The liquid injection plate gap filling mechanism includes a slot plate 1 slidably connected to one side of the upper end of the frame, a lifting rod is slidably connected to the slot of the slot plate 1, a slot plate 2 is rotatably provided at one end of the lifting rod, a liquid collecting plate is fixedly connected to the lower end of the slot plate 2, and extension plates are inserted and slidably connected on both sides of the liquid collecting plate.

[0006] Preferably, a liquid storage tank is fixedly connected to one side of the upper end surface of the lifting plate, and a front end side of the liquid storage tank is connected and fixedly connected to a pump body, a liquid outlet end of the pump body is connected to a long tube, one side of the long tube is connected to multiple branch pipes, one end of the branch pipe is connected to a liquid injection head, and a solenoid valve is provided on the liquid injection head.

[0007] Preferably, one side of the lifting plate is slidably connected to a slide rod three, the lower end of the slide rod three is fixedly connected to a bevel plate, a plurality of bevel grooves are provided on the bevel plate, the adjusting column passes through the bevel groove on the bevel plate and is slidably connected thereto, one side of the upper end surface of the lifting plate is fixedly connected to an electric push rod, and the piston end of the electric push rod is fixedly connected to one side of the bevel plate.

[0008] Preferably, the frame is also provided with an auxiliary displacement mechanism for clamping the liquid injection tray; The auxiliary displacement mechanism comprises a displacement frame slidably connected to one side of the upper end of the frame, two ends of the displacement frame are fixedly connected to a second slide bar, and both sides of the second slide bar are slidably connected to a clamping plate.

[0009] Preferably, one end of the frame is threadedly connected with a threaded rod 2, both ends of the threaded rod 2 are rotatably set on the frame, one side of the upper end of the frame is fixedly connected with a motor 2, the output end of the motor 2 is fixedly connected to one end of the threaded rod 2, two ends of the displacement frame are rotatably provided with a bidirectional threaded rod 1, both sides of the bidirectional threaded rod 1 are threadedly connected to the clamping plate, one side of the displacement frame is fixedly connected with a motor 3, and the output end of the motor 3 is fixedly connected to one end of the bidirectional threaded rod 1.

[0010] Preferably, a threaded rod 1 is threadedly connected to one side of the lifting plate, both ends of the threaded rod 1 are rotatably arranged on the frame, a motor 1 is fixedly connected to one side of the upper end surface of the frame, and the output end of the motor 1 is fixedly connected to one end of the threaded rod 1.

[0011] Preferably, a threaded rod three is threadedly connected to one side of a lower end of the slot plate, and both ends of the threaded rod three are rotatably set on the frame, a motor four is fixedly connected to one side of the upper end of the frame, and the output end of the motor four is fixedly connected to one end of the threaded rod three, and one end of the lifting rod is threadedly connected to the threaded rod four, and both ends of the threaded rod four are rotatably set on the slot plate one, and the upper end of the slot plate one is fixedly connected to the motor five, and the output end of the motor five is fixedly connected to one end of the threaded rod four.

[0012] Preferably, one end of the lifting rod is fixedly connected to a motor eight, and an output end of the motor eight is fixedly connected to one side of the slot plate two.

[0013] Preferably, both sides of one end of the slot plate 2 are rotatably provided with a slide rod, one side of the extension plate is fixedly connected to a guide column, the guide column passes through the slide groove of the slide rod and is slidably connected thereto, one end of the slide rod is fixedly connected to a gear, the two gears are meshed with each other, one side of the lower end of the slot plate 2 is fixedly connected to a motor 7, and the output end of the motor 7 is fixedly connected to one end of the slide rod.

[0014] Preferably, a fixing rod is slidably connected to the sliding groove on the upper side of the groove plate 2, and a plate body is slidably connected to both sides of the fixing rod, and a bidirectional threaded rod 2 is threadedly connected to one side of the upper end of the plate body, and both ends of the bidirectional threaded rod 2 are rotatably set on the fixing rod, and one end of the fixing rod is fixedly connected to a motor 9, and the output end of the motor 9 is fixedly connected to one end of the bidirectional threaded rod 2, and a threaded rod 5 is threadedly connected to one side of the fixing rod, and both ends of the threaded rod 5 are rotatably set on the groove plate 2, and the upper end of the groove plate 2 is fixedly connected to a motor 6, and the output end of the motor 6 is fixedly connected to one end of the threaded rod 5.

[0015] The beneficial effects of the present invention are as follows: 1. The liquid injection device for lithium battery production described in the present invention can adjust the spacing of the liquid injection heads according to the spacing between each row of adjacent lithium batteries to ensure that each liquid injection head is aligned with the lithium battery, thereby being able to adapt to different usage requirements and improving the liquid injection efficiency.

[0016] 2. The liquid injection device for lithium battery production described in the present invention utilizes a liquid injection tray gap filling mechanism. Whenever the liquid injection head completes a liquid injection, and the liquid injection head and the liquid injection tray are relatively displaced and aligned with another row of lithium batteries, the gap between the two rows of lithium batteries can be filled through the liquid collecting plate and the extension plate, thereby avoiding the situation where the electrolyte remaining at the end of the liquid injection head drips onto the surface of the liquid injection tray due to the relative displacement between the liquid injection head and the liquid injection tray, thereby ensuring the cleanliness of the liquid injection tray and facilitating subsequent use. In addition, a collection container can be placed at the end of the liquid collecting plate to drive the liquid collecting plate to tilt, and the electrolyte on the liquid collecting plate will flow along the liquid collecting plate. The electrolyte is then recycled and stored in the reservoir so that it can be reused and stored in the reservoir when the electrolyte is recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 1. It is a schematic diagram of the three-dimensional structure of the displacement frame; Figure 3 It is a schematic diagram of a three-dimensional structure of a slot plate; Figure 4 yes Figure 3 A partial enlarged view of the middle part; Figure 5 It is a schematic diagram of the three-dimensional structure of the slot plate at two locations; Figure 6 1. It is a schematic diagram of the three-dimensional structure at the liquid collecting plate; Figure 7 It is a schematic diagram of the three-dimensional structure at the fixed rod; Figure 8 It is a schematic diagram of the three-dimensional structure at the injection head; Fig. 9 It is a schematic diagram of the three-dimensional structure of the liquid storage tank; Fig.10 It is a schematic diagram of the three-dimensional structure at the limiting plate.

[0019] In the figure: 1, conveyor belt; 2, frame; 3, frame body; 4, motor 1; 5, threaded rod 1; 6, slide rod 1; 7, lifting plate; 8, liquid storage tank; 9, displacement frame; 10, threaded rod 2; 11, motor 2; 12, motor 3; 13, two-way threaded rod 1; 14, slide rod 2; 15, clamping plate; 16, threaded rod 3; 17, motor 4; 18, slot plate 1; 19, threaded rod 4; 20, motor 5; 21, lifting rod; 22, plate body; 23, pump body; 24, long tube; 25, branch pipe; 26, slide rod three; 27, electric push rod; 28, inclined slot plate; 29, injection head; 30, limit plate; 31, slider; 32, motor six; 33, threaded rod five; 34, fixed rod; 35, extension plate; 36, motor seven; 37, gear; 38, slide rod; 39, guide column; 40, liquid collecting plate; 41, motor eight; 42, two-way threaded rod two; 43, motor nine; 44, adjustment column; 45, slot plate two. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Please refer to Figure 1-Figure 10The present invention provides a technical solution: a liquid injection device for lithium battery production, comprising a frame 2, a conveyor belt 1 is arranged on the frame 2, a frame body 3 is fixedly connected to one side of the upper end of the frame 2, a slide bar 6 is fixedly connected to both ends of one side of the frame body 3, a lifting plate 7 is slidably connected to the slide bar 6, a limit plate 30 is fixedly connected to one side of the lower end surface of the lifting plate 7, a plurality of sliders 31 are slidably connected to the limit plate 30, an adjusting column 44 is fixedly connected to one side of the slider 31, and a liquid injection head 29 is fixedly connected to one end of the adjusting column 44, and a liquid injection plate gap filling mechanism for preventing electrolyte from dripping onto the liquid injection plate is also arranged on the frame 2; The gap filling mechanism of the liquid injection tray includes a groove plate 18 slidably connected to one side of the upper end of the frame 2, and a lifting rod 21 is slidably connected to the groove of the groove plate 18. A groove plate 2 45 is rotatably provided at one end of the lifting rod 21. The lower end of the groove plate 2 45 is fixedly connected to a liquid collecting plate 40, and extension plates 35 are inserted and slidably connected on both sides of the liquid collecting plate 40.

[0022] In this embodiment, Figure 1-Figure 2 , Figure 8-Figure 10 As shown, a liquid storage tank 8 is fixedly connected to one side of the upper end surface of the lifting plate 7, and a pump body 23 is connected and fixedly connected to one side of the front end of the liquid storage tank 8. A long tube 24 is connected to the liquid outlet end of the pump body 23, and a plurality of branch pipes 25 are connected to one side of the long tube 24. One end of the branch pipe 25 is connected to a liquid injection head 29, and a solenoid valve is provided on the liquid injection head 29.

[0023] A slide rod 3 26 is slidably connected to one side of the lifting plate 7, and a chute plate 28 is fixedly connected to the lower end of the slide rod 3 26. The chute plate 28 is provided with multiple chute grooves. The adjusting column 44 passes through the chute grooves on the chute plate 28 and is slidably connected thereto. An electric push rod 27 is fixedly connected to one side of the upper end surface of the lifting plate 7, and the piston end of the electric push rod 27 is fixedly connected to one side of the chute plate 28.

[0024] The frame 2 is also provided with an auxiliary displacement mechanism for clamping the liquid injection tray; The auxiliary displacement mechanism comprises a displacement frame 9 slidably connected to one side of the upper end of the frame 2 , two ends of the displacement frame 9 are fixedly connected to a second slide bar 14 , and both sides of the second slide bar 14 are slidably connected to a clamping plate 15 .

[0025] A threaded rod 2 10 is threadedly connected to one end of the frame 2, and both ends of the threaded rod 2 10 are rotatably set on the frame 2. A motor 2 11 is fixedly connected to one side of the upper end of the frame 2, and the output end of the motor 2 11 is fixedly connected to one end of the threaded rod 2 10. A bidirectional threaded rod 13 is rotatably set at both ends of the displacement frame 9, and both sides of the bidirectional threaded rod 13 are threadedly connected to the clamping plate 15. A motor 3 12 is fixedly connected to one side of the displacement frame 9, and the output end of the motor 3 12 is fixedly connected to one end of the bidirectional threaded rod 13.

[0026] A threaded rod 5 is threadedly connected to one side of the lifting plate 7, and both ends of the threaded rod 5 are rotatably arranged on the frame body 3. A motor 4 is fixedly connected to one side of the upper end surface of the frame body 3, and the output end of the motor 4 is fixedly connected to one end of the threaded rod 5.

[0027] Specifically, a liquid injection tray equipped with multiple lithium batteries is placed on the conveyor belt 1, and the conveyor belt 1 drives the liquid injection tray to move. When one side of the liquid injection tray is between the two clamping plates 15, the motor 3 12 is used to drive the bidirectional threaded rod 13 to rotate, so that the two clamping plates 15 are close to each other to clamp the liquid injection tray, so that the liquid injection tray is fixed and is in the center of the conveyor belt 1, and the lithium batteries in the middle of each row are aligned with the liquid injection head 29 in the middle, and then according to the spacing between each row of adjacent lithium batteries on the liquid injection tray, the electric push rod 27 is used to drive the inclined slot plate 28 to rise and fall. Since the adjustment column 44 passes through the inclined slot on the inclined slot plate 28, when the inclined slot plate 28 moves up and down, the adjustment column 44 will also move accordingly, so that the sliders 31 except the middle part can slide on the limit plate 30 at the same time, so that the distances between the multiple liquid injection heads 29 change equally, and the branch pipe 25 part is a hose, which can adapt to this change until the spacing between adjacent liquid injection heads 29 is equal to the relative spacing. The spacing of adjacent lithium batteries, and then according to the number of lithium batteries in a row, if the number of lithium batteries is less than the number of injection heads 29, the solenoid valve on the injection head 29 that is not aligned with the lithium battery is closed, and then the motor 4 drives the threaded rod 5 to rotate to make the lifting plate 7 drop, so that multiple injection heads 29 extend into the lithium battery, and then the pump body 23 is used to extract the electrolyte in the liquid storage tank 8, and inject it into the lithium battery after passing through the long tube 24, the branch pipe 25, and the injection head 29, and then the injection plate is driven to move intermittently, so that the electrolyte can be injected into each row of lithium batteries. At the same time, the motor 2 11 drives the threaded rod 2 10 to rotate, so that the splint 15 and the injection plate move synchronously to ensure the stability of the injection plate, so that the spacing of the injection heads 29 can be adjusted according to the spacing of each row of adjacent lithium batteries to ensure that each injection head is aligned with the lithium battery, thereby adapting to different usage requirements and improving the injection efficiency.

[0028] In this embodiment, Figure 2-Figure 7 As shown, a threaded rod three 16 is threadedly connected to one side of the lower end of the slot plate 18, and both ends of the threaded rod three 16 are rotatably set on the frame 2. A motor four 17 is fixedly connected to one side of the upper end of the frame 2, and the output end of the motor four 17 is fixedly connected to one end of the threaded rod three 16. A lifting rod 21 is threadedly connected to one end of the threaded rod four 19, and both ends of the threaded rod four 19 are rotatably set on the slot plate 18. A motor five 20 is fixedly connected to the upper end of the slot plate 18, and the output end of the motor five 20 is fixedly connected to one end of the threaded rod four 19.

[0029] One end of the lifting rod 21 is fixedly connected to a motor 8 41 , and an output end of the motor 8 41 is fixedly connected to one side of the slot plate 2 45 .

[0030] Slide rods 38 are rotatably provided on both sides of one end of the slot plate 2 45, a guide column 39 is fixedly connected to one side of the extension plate 35, the guide column 39 passes through the slide slot of the slide rod 38 and is slidably connected thereto, a gear 37 is fixedly connected to one end of the slide rod 38, the two gears 37 are meshed with each other, a motor 7 36 is fixedly connected to one side of the lower end of the slot plate 2 45, and the output end of the motor 7 36 is fixedly connected to one end of the slide rod 38.

[0031] A fixing rod 34 is slidably connected to the sliding groove on the upper side of the groove plate 245, and the plate body 22 is slidably connected to both sides of the fixing rod 34. A bidirectional threaded rod 242 is threadedly connected to one side of the upper end of the plate body 22, and both ends of the bidirectional threaded rod 242 are rotatably set on the fixing rod 34, and a motor 9 43 is fixedly connected to one end of the fixing rod 34, and the output end of the motor 9 43 is fixedly connected to one end of the bidirectional threaded rod 242, and a threaded rod 5 33 is threadedly connected to one side of the fixing rod 34, and both ends of the threaded rod 5 33 are rotatably set on the groove plate 245, and a motor 6 32 is fixedly connected to the upper end of the groove plate 245, and the output end of the motor 6 32 is fixedly connected to one end of the threaded rod 5 33.

[0032] Specifically, in the prior art, the lithium batteries that need to be injected are usually arranged in multiple rows and placed on an injection tray at equal intervals, and the injection tray is placed on a conveyor belt 1, which drives the injection tray to move, and uses an injection head 29 to inject liquid into each row of lithium batteries in turn. Although this method can improve the injection efficiency, since each row of lithium batteries has a gap, when a row of lithium batteries is injected and the injection tray is driven to move so that the injection head 29 is aligned with the next row of lithium batteries, the liquid outlet of the injection head 29 will be aligned with the gap between the two rows of lithium batteries for a period of time. Under normal circumstances, there will be residual electrolyte at the end of the injection head 29 every time the injection is completed. When the liquid outlet of the injection head 29 is aligned with the gap between the two rows of lithium batteries, these electrolytes may drip onto the injection tray, which not only easily causes the injection tray to be contaminated and affects subsequent use, but also leads to waste of electrolyte; Therefore, in order to avoid the above problems, when the present embodiment is in use, when a row of lithium batteries is aligned with the injection head 29, the motor 5 20 drives the threaded rod 4 19 to rotate, so that the lifting rod 21 is lowered, and the liquid collecting plate 40 is placed in the middle between the two rows of lithium batteries, and then the motor 7 36 drives the slide rod 38 and the gear 37 to rotate, so that the slide rods 38 on both sides rotate in different directions at the same time, so that the extension plate 35 slides on the liquid collecting plate 40 until the end of the extension plate 35 is in contact with the upper edges of the two rows of lithium batteries. When the injection of a row of lithium batteries is completed and the injection tray continues to move, the groove plate 18 will also be synchronously displaced under the action of the motor 4 17 driving the threaded rod 3 16 to rotate. During the movement of the injection head 29 from the top of one row of lithium batteries to the top of another row of lithium batteries, even if there is electrolyte from the injection The end of the liquid head 29 drips, and it will only drip onto the extension plate 35 and the liquid collecting plate 40, and will not drip onto the liquid injection tray. Then, the above operation is repeated. After each row of lithium batteries is filled, the liquid injection head 29 rises, the liquid collecting plate 40 moves upward, and is placed between the other two rows of lithium batteries again. This avoids the situation where the electrolyte remaining at the end of the liquid injection head 29 drips onto the surface of the liquid injection tray due to the relative displacement between the liquid injection head 29 and the liquid injection tray, thereby ensuring the cleanliness of the liquid injection tray for subsequent use. In addition, a collection container can be placed at the end of the liquid collecting plate 40, and the liquid collecting plate 40 can be rotated by the motor 8 41 to tilt it. Then, the electrolyte on the liquid collecting plate 40 will slide along the angle of the liquid collecting plate 40 into the collection container, thereby realizing the recovery of the electrolyte and avoiding the waste of the electrolyte. Although the above method can prevent the electrolyte from falling onto the injection tray, when the injection head 29 and the injection tray are relatively displaced, the end of the injection head 29 will still be aligned with the side where the upper edges of the two rows of lithium batteries are close to each other, and the electrolyte may remain there, which also affects the cleanliness of the lithium battery surface and causes waste of electrolyte. Therefore, in order to avoid this situation, each time the injection head 29 completes an injection and the injection head 29 is aligned with another row of lithium batteries, the motor 6 32 drives the threaded rod 5 33 to descend, so that the plate 22 descends to a position where the bottom is flush with the upper edge of the lithium battery, and then the motor 9 43 drives the two-way The threaded rod 42 rotates in such a way that the plates 22 on both sides slide and approach each other at the same time. Since the initial positions of the two plates 22 are on both sides of the extension plate 35, when the two plates 22 approach each other, they will form a scraping action with the upper edges of the lithium batteries on both sides of the liquid collecting plate 40, and the electrolyte on the upper edges of the lithium batteries will be scraped onto the liquid collecting plate 40, thereby realizing another recovery of the electrolyte and avoiding the situation in which, when the injection head 29 and the injection tray are relatively displaced, the end of the injection head 29 is aligned with the side where the upper edges of the two rows of lithium batteries are close to each other, causing the electrolyte to remain there, affecting the cleanliness of the surface of the lithium batteries and causing waste of electrolyte.

[0033] Working principle: Place the injection tray with multiple lithium batteries on the conveyor belt 1, and the conveyor belt 1 drives the injection tray to move. When one side of the injection tray is between the two clamps 15, the motor 3 12 is used to drive the bidirectional threaded rod 13 to rotate, so that the two clamps 15 are close to each other to clamp the injection tray, so that the injection tray can be fixed and located in the center of the conveyor belt 1, and the lithium batteries in the middle of each row are aligned with the injection head 29 in the middle, and then according to the spacing of each row of adjacent lithium batteries on the injection tray, the electric push rod 27 is used to drive the inclined slot plate 28 to rise and fall. Since the adjustment column 44 passes through the inclined slot on the inclined slot plate 28, when the inclined slot plate 28 moves up and down, the adjustment column 44 will also move accordingly, so that the sliders 31 except the middle part can slide on the limit plate 30 at the same time, so that multiple injection heads The distance between the two ends of the lithium battery 29 changes equally, and the branch pipe 25 is a hose that can adapt to this change until the spacing between adjacent injection heads 29 is equal to the spacing between adjacent lithium batteries. Then, according to the number of lithium batteries in a row, if the number of lithium batteries is less than the number of injection heads 29, the solenoid valve on the injection head 29 that is not aligned with the lithium battery is closed, and then the motor 14 drives the threaded rod 15 to rotate, so that the lifting plate 7 is lowered, and multiple injection heads 29 are extended into the lithium battery. Then, the pump body 23 is used to extract the electrolyte in the liquid storage tank 8, and inject it into the lithium battery after passing through the long tube 24, the branch pipe 25, and the injection head 29. Then, the injection plate is driven to move intermittently, so that the electrolyte is injected into each row of lithium batteries. At the same time, the motor 11 drives the threaded rod 10 By rotating, the clamping plate 15 and the liquid injection tray move synchronously to ensure the stability of the liquid injection tray, so that the spacing of the liquid injection heads 29 can be adjusted according to the spacing between each row of adjacent lithium batteries to ensure that each liquid injection head is aligned with the lithium batteries, thereby adapting to different usage requirements and improving the liquid injection efficiency. When a row of lithium batteries is aligned with the liquid injection heads 29, the motor 5 20 drives the threaded rod 4 19 to rotate, so that the lifting rod 21 descends, so that the liquid collecting plate 40 is placed in the middle between the two rows of lithium batteries, and then the motor 7 36 drives the slide rod 38 and the gear 37 to rotate, so that the slide rods 38 on both sides rotate in different directions at the same time, so that the extension plate 35 slides on the liquid collecting plate 40 until the end of the extension plate 35 fits with the upper edges of the two rows of lithium batteries. When the lithium battery filling is completed and the filling tray continues to move, the groove plate 18 will also be synchronously displaced under the action of the motor 4 17 driving the threaded rod 3 16 to rotate. During the movement of the filling head 29 from above one row of lithium batteries to above another row of lithium batteries, even if electrolyte drips from the end of the filling head 29, it will only drip onto the extension plate 35 and the liquid collecting plate 40, and will not drip onto the filling tray. Then repeat the above operation. After each row of lithium batteries is filled, the filling head 29 rises, the liquid collecting plate 40 moves upward, and is placed between the other two rows of lithium batteries again, thereby avoiding the situation where the electrolyte remaining at the end of the filling head 29 drips onto the surface of the filling tray due to the relative displacement between the filling head 29 and the filling tray, thereby ensuring the cleanliness of the filling tray and facilitating subsequent use.A collecting container can be placed at the end of the collecting plate 40, and the collecting plate 40 can be rotated by the motor 8 41 to be tilted, so that the electrolyte on the collecting plate 40 will slide along the angle of the collecting plate 40 into the collecting container, thereby realizing the recovery of the electrolyte and avoiding the waste of the electrolyte. Although the above method can prevent the electrolyte from falling onto the liquid injection tray, when the liquid injection head 29 and the liquid injection tray are relatively displaced, the end of the liquid injection head 29 will still be aligned with the side where the upper edges of the two rows of lithium batteries are close to each other, and the electrolyte may remain there, which also affects the cleanliness of the lithium battery surface and also causes the waste of electrolyte. Therefore, in order to avoid this situation, each time the liquid injection head 29 completes a liquid injection and the liquid injection head 29 is aligned with another row of lithium batteries, the motor 6 32 drives the screw The threaded rod 5 33 descends, causing the plate 22 to descend to a position where the bottom is flush with the upper edge of the lithium battery, and then the motor 9 43 drives the two-way threaded rod 2 42 to rotate, so that the plates 22 on both sides slide simultaneously and approach each other. Since the initial positions of the two plates 22 are on both sides of the extension plate 35, when the two plates 22 approach each other, they will form a scraping with the upper edges of the lithium batteries on both sides of the liquid collecting plate 40, and scrape the electrolyte on the upper edge of the lithium battery onto the liquid collecting plate 40, thereby realizing another recovery of the electrolyte, and avoiding the situation that when the injection head 29 and the injection tray are relatively displaced, the end of the injection head 29 is aligned with the side where the upper edges of the two rows of lithium batteries are close to each other, resulting in the electrolyte remaining there, affecting the cleanliness of the lithium battery surface and causing the electrolyte waste.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A liquid injection device for lithium battery production, comprising a frame (2), characterized in that: The frame (2) is provided with a conveyor belt (1), one side of the upper end of the frame (2) is fixedly connected to a frame body (3), both ends of one side of the frame body (3) are fixedly connected to a slide bar (6), the slide bar (6) is slidably connected to a lifting plate (7), one side of the lower end surface of the lifting plate (7) is fixedly connected to a limit plate (30), a plurality of slide blocks (31) are slidably connected to the limit plate (30), one side of the slide block (31) is fixedly connected to an adjustment column (44), one end of the adjustment column (44) is fixedly connected to a liquid injection head (29), and the frame (2) is also provided with a liquid injection plate gap filling mechanism for preventing electrolyte from dripping onto the liquid injection plate; The liquid injection plate gap filling mechanism comprises a slot plate 1 (18) slidably connected to one side of the upper end of the frame (2); a lifting rod (21) is slidably connected to the slot of the slot plate 1 (18); a slot plate 2 (45) is rotatably provided at one end of the lifting rod (21); a liquid collecting plate (40) is fixedly connected to the lower end of the slot plate 2 (45); and extension plates (35) are inserted and slidably connected to both sides of the liquid collecting plate (40).

2. A liquid injection device for lithium battery production according to claim 1, characterized in that: A liquid storage tank (8) is fixedly connected to one side of the upper end surface of the lifting plate (7); a front end of the liquid storage tank (8) is connected to and fixedly connected to a pump body (23); a liquid outlet end of the pump body (23) is connected to a long tube (24); one side of the long tube (24) is connected to a plurality of branch tubes (25); one end of the branch tube (25) is connected to a liquid injection head (29); and a solenoid valve is provided on the liquid injection head (29).

3. A liquid injection device for lithium battery production according to claim 1, characterized in that: One side of the lifting plate (7) is slidably connected to a slide rod three (26), the lower end of the slide rod three (26) is fixedly connected to an inclined slot plate (28), a plurality of inclined slots are provided on the inclined slot plate (28), the adjustment column (44) passes through the inclined slots on the inclined slot plate (28) and is slidably connected thereto, one side of the upper end surface of the lifting plate (7) is fixedly connected to an electric push rod (27), the piston end of the electric push rod (27) is fixedly connected to one side of the inclined slot plate (28).

4. A liquid injection device for lithium battery production according to claim 1, characterized in that: The frame (2) is also provided with an auxiliary displacement mechanism for clamping the liquid injection tray; The auxiliary displacement mechanism comprises a displacement frame (9) slidably connected to one side of the upper end of the frame (2), two ends of the displacement frame (9) are fixedly connected to a second slide bar (14), and both sides of the second slide bar (14) are slidably connected to a clamping plate (15).

5. A liquid injection device for lithium battery production according to claim 4, characterized in that: One end of the frame (2) is threadedly connected to a second threaded rod (10), and both ends of the second threaded rod (10) are rotatably arranged on the frame (2). One side of the upper end of the frame (2) is fixedly connected to a second motor (11), and the output end of the second motor (11) is fixedly connected to one end of the second threaded rod (10). Two ends of the displacement frame (9) are rotatably provided with a first bidirectional threaded rod (13), and both sides of the first bidirectional threaded rod (13) are threadedly connected to a clamping plate (15). One side of the displacement frame (9) is fixedly connected to a third motor (12), and the output end of the third motor (12) is fixedly connected to one end of the first bidirectional threaded rod (13).

6. A liquid injection device for lithium battery production according to claim 5, characterized in that: One side of the lifting plate (7) is threadedly connected to a threaded rod (5), both ends of the threaded rod (5) are rotatably arranged on the frame (3), one side of the upper end surface of the frame (3) is fixedly connected to a motor (4), and the output end of the motor (4) is fixedly connected to one end of the threaded rod (5).

7. A liquid injection device for lithium battery production according to claim 1, characterized in that: One side of the lower end of the slot plate one (18) is threadedly connected to a threaded rod three (16), and both ends of the threaded rod three (16) are rotatably arranged on the frame (2). One side of the upper end of the frame (2) is fixedly connected to a motor four (17), and the output end of the motor four (17) is fixedly connected to one end of the threaded rod three (16). One end of the lifting rod (21) is threadedly connected to a threaded rod four (19), and both ends of the threaded rod four (19) are rotatably arranged on the slot plate one (18). The upper end of the slot plate one (18) is fixedly connected to a motor five (20), and the output end of the motor five (20) is fixedly connected to one end of the threaded rod four (19).

8. A liquid injection device for lithium battery production according to claim 1, characterized in that: One end of the lifting rod (21) is fixedly connected to a motor eight (41), and an output end of the motor eight (41) is fixedly connected to one side of the slot plate two (45).

9. A liquid injection device for lithium battery production according to claim 1, characterized in that: A slide rod (38) is rotatably provided on both sides of one end of the second slot plate (45); a guide column (39) is fixedly connected to one side of the extension plate (35); the guide column (39) passes through the slide groove of the slide rod (38) and is slidably connected thereto; a gear (37) is fixedly connected to one end of the slide rod (38); the two gears (37) are meshed with each other; a motor (36) is fixedly connected to one side of the lower end of the second slot plate (45); an output end of the motor (36) is fixedly connected to one end of the slide rod (38).

10. A liquid injection device for lithium battery production according to claim 1, characterized in that: A fixing rod (34) is slidably connected to the upper sliding groove of the groove plate 2 (45), and both sides of the fixing rod (34) are slidably connected to the plate body (22). One side of the upper end of the plate body (22) is threadedly connected to the bidirectional threaded rod 2 (42), and both ends of the bidirectional threaded rod 2 (42) are rotatably arranged on the fixing rod (34). One end of the fixing rod (34) is fixedly connected to the motor 9 (43), and the output end of the motor 9 (43) is fixedly connected to one end of the bidirectional threaded rod 2 (42). One side of the fixing rod (34) is threadedly connected to the threaded rod 5 (33), and both ends of the threaded rod 5 (33) are rotatably arranged on the groove plate 2 (45). The upper end of the groove plate 2 (45) is fixedly connected to the motor 6 (32), and the output end of the motor 6 (32) is fixedly connected to one end of the threaded rod 5 (33).

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