A liquid injection device for lithium battery production

Abstract

The present invention belongs to the field of lithium battery production equipment, and specifically relates to a liquid injection device for lithium battery production, including a frame. One side of the upper end of the frame is fixedly connected with a frame body. Both ends of one side of the frame body are fixedly connected with a first slide bar. The first slide bar is slidably connected with a lifting plate. One side of the lower end surface of the lifting plate is fixedly connected with a limiting plate. A plurality of sliders are slidably connected to the limiting plate. One side of the slider is fixedly connected with an adjusting column. One end of the adjusting column is fixedly connected with a liquid injection head. The present invention utilizes a liquid injection tray gap filling mechanism. Whenever the liquid injection head completes one liquid injection, and the liquid injection head and the liquid injection tray have a relative displacement and are 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, avoiding the situation that 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.

Description

Technical Field

[0001] The present invention belongs to the field of lithium battery production equipment, and specifically relates to a liquid injection device for lithium battery production. Background Art

[0002] A lithium battery uses a lithium alloy metal oxide as the positive electrode material and graphite as the negative electrode material, and uses a non-aqueous electrolyte. During the production process of a lithium battery, it is necessary to fill the inside of the lithium battery with electrolyte to ensure the normal charge and discharge performance of the battery.

[0003] In the prior art, lithium batteries to be injected with liquid are usually arranged in multiple rows at equal intervals on a liquid injection tray, and the liquid injection tray is placed on a conveyor belt. The conveyor belt drives the liquid injection tray to move, and a liquid injection head is used to inject liquid into each row of lithium batteries in turn. Although the injection efficiency can be improved in this way, since there are gaps between each row of lithium batteries, when a row of lithium batteries is injected with liquid and the liquid injection head is aligned with the next row of lithium batteries by driving the liquid injection tray to move, the liquid outlet end of the liquid injection head will be aligned with the gap between the two rows of lithium batteries for a period of time. Usually, there is residual electrolyte at the end of the liquid injection head every time it completes an injection. When the liquid outlet end of the liquid injection head is aligned with the gap between the two rows of lithium batteries, this electrolyte may drip onto the liquid injection tray, which not only easily causes the liquid injection tray to be contaminated and affects subsequent use, but also causes 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 proposed in the background art, 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 problems is: a liquid injection device for lithium battery production, including a frame, a conveyor belt is arranged on the frame, one side of the upper end of the frame is fixedly connected with a frame body, both ends of one side of the frame body are fixedly connected with a first sliding rod, the first sliding rod is slidably connected with a lifting plate, one side of the lower end surface of the lifting plate is fixedly connected with a limiting plate, a plurality of sliders are slidably connected on the limiting plate, one side of the slider is fixedly connected with an adjusting column, one end of the adjusting column is fixedly connected with a liquid injection head, and a liquid injection tray gap filling mechanism for preventing electrolyte from dripping onto the liquid injection tray is also arranged on the frame;

[0006] The liquid injection tray gap filling mechanism includes a first groove plate slidably connected to one side of the upper end of the frame, a lifting rod is slidably connected to the chute of the first groove plate, one end of the lifting rod is rotatably provided with a second groove plate, a liquid collecting plate is fixedly connected to the lower end of the second groove plate, and extension plates are inserted and slidably connected to both sides of the liquid collecting plate.

[0007] Preferably, one side of the upper end surface of the lifting plate is fixedly connected with a liquid storage tank. One side of the front end of the liquid storage tank is communicated with and fixedly connected with a pump body. The liquid outlet end of the pump body is communicated with a long pipe. A plurality of branch pipes are communicated with one side of the long pipe. One end of each branch pipe is communicated with an injection head, and an electromagnetic valve is arranged on the injection head.

[0008] Preferably, a third sliding rod is slidably connected to one side of the lifting plate. The lower end of the third sliding rod is fixedly connected with an inclined groove plate. A plurality of inclined grooves are arranged on the inclined groove plate. The adjusting column passes through the inclined grooves on the inclined groove plate and is slidably connected therewith. One side of the upper end surface of the lifting plate is fixedly connected with an electric push rod, and the piston end of the electric push rod is fixedly connected with one side of the inclined groove plate.

[0009] Preferably, an auxiliary displacement mechanism for clamping the injection tray is further arranged on the frame;

[0010] The auxiliary displacement mechanism includes a displacement frame slidably connected to one side of the upper end of the frame. Two sliding rods are fixedly connected to both ends of the displacement frame, and clamping plates are slidably connected to both sides of the two sliding rods.

[0011] Preferably, a second threaded rod is threadedly connected to one end of the frame. Both ends of the second threaded rod are rotatably arranged on the frame. A second motor is fixedly connected to one side of the upper end of the frame, and the output end of the second motor is fixedly connected to one end of the second threaded rod. A first bidirectional threaded rod is rotatably arranged at both ends of the displacement frame. Both sides of the first bidirectional threaded rod are threadedly connected with the clamping plates. A third motor is fixedly connected to one side of the displacement frame, and the output end of the third motor is fixedly connected to one end of the first bidirectional threaded rod.

[0012] Preferably, a first threaded rod is threadedly connected to one side of the lifting plate. Both ends of the first threaded rod are rotatably arranged on the frame body. A first motor is fixedly connected to one side of the upper end surface of the frame body, and the output end of the first motor is fixedly connected to one end of the first threaded rod.

[0013] Preferably, a third threaded rod is threadedly connected to one side of the lower end of the first groove plate. Both ends of the third threaded rod are rotatably arranged on the frame. A fourth motor is fixedly connected to one side of the upper end of the frame, and the output end of the fourth motor is fixedly connected to one end of the third threaded rod. One end of the lifting rod is threadedly connected with a fourth threaded rod. Both ends of the fourth threaded rod are rotatably arranged on the first groove plate. A fifth motor is fixedly connected to the upper end of the first groove plate, and the output end of the fifth motor is fixedly connected to one end of the fourth threaded rod.

[0014] Preferably, an eighth motor is fixedly connected to one end of the lifting rod, and the output end of the eighth motor is fixedly connected to one side of the second groove plate.

[0015] Preferably, sliding groove rods are rotatably arranged on both sides of one end of the second groove plate. A guiding column is fixedly connected to one side of the extension plate. The guiding column passes through the sliding groove of the sliding groove rod and is slidably connected thereto. A gear is fixedly connected to one end of the sliding groove rod. The two gears are meshed with each other. A seventh motor is fixedly connected to one side of the lower end of the second groove plate. The output end of the seventh motor is fixedly connected to one end of the sliding groove rod.

[0016] Preferably, a fixing rod is slidably connected to the sliding groove on the upper side of the second groove plate. Plate bodies are slidably connected to both sides of the fixing rod. A second bidirectional threaded rod is threadedly connected to one side of the upper end of the plate body. Both ends of the second bidirectional threaded rod are rotatably arranged on the fixing rod. A ninth motor is fixedly connected to one end of the fixing rod. The output end of the ninth motor is fixedly connected to one end of the second bidirectional threaded rod. A fifth threaded rod is threadedly connected to one side of the fixing rod. Both ends of the fifth threaded rod are rotatably arranged on the second groove plate. A sixth motor is fixedly connected to the upper end of the second groove plate. The output end of the sixth motor is fixedly connected to one end of the fifth threaded rod.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. For the liquid injection device for lithium battery production of the present invention, the distance between the liquid injection heads can be adjusted according to the distance between adjacent lithium batteries in each row, ensuring that each liquid injection head is aligned with the lithium battery, thereby adapting to different usage requirements and improving the liquid injection efficiency.

[0019] 2. For the liquid injection device for lithium battery production of the present invention, by using the liquid injection disc gap filling mechanism, whenever a liquid injection head completes a liquid injection, and the liquid injection head and the liquid injection disc have a relative displacement and are 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, avoiding the situation that the electrolyte remaining at the end of the liquid injection head drips onto the surface of the liquid injection disc due to the relative displacement between the liquid injection head and the liquid injection disc, ensuring the cleanliness of the liquid injection disc and facilitating subsequent use. Moreover, a collection container can be placed at the end of the liquid collecting plate, and the liquid collecting plate is driven to be inclined, and the electrolyte on the liquid collecting plate will slide down along the included angle of the liquid collecting plate into the collection container, realizing the recovery of the electrolyte and avoiding the waste of the electrolyte. Furthermore, whenever a liquid injection head completes a liquid injection and is aligned with another row of lithium batteries, the upper edges of the lithium batteries on both sides of the liquid collecting plate can be scraped by the two plate bodies, and the electrolyte on the upper edges of the lithium batteries is scraped onto the liquid collecting plate, thereby realizing another recovery of the electrolyte and avoiding the situation that when the liquid injection head and the liquid injection disc have a relative displacement, the end of the liquid injection head is aligned with the side where the upper edges of the two rows of lithium batteries are close to each other, resulting in electrolyte residue here, affecting the cleanliness of the surface of the lithium battery and causing waste of the electrolyte. Description of the Drawings

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a schematic three-dimensional structure diagram of the present invention;

[0022] Figure 2 It is a schematic three-dimensional structure diagram at the displacement frame;

[0023] Figure 3 It is a schematic three-dimensional structure diagram at the first groove plate;

[0024] Figure 4 It is Figure 3 The partial enlarged view at position A in

[0025] Figure 5 It is a schematic three-dimensional structure diagram at the second groove plate;

[0026] Figure 6 It is a schematic three-dimensional structure diagram at the liquid collection plate;

[0027] Figure 7 It is a schematic three-dimensional structure diagram at the fixed rod;

[0028] Figure 8 It is a schematic three-dimensional structure diagram at the liquid injection head;

[0029] Figure 9 It is a schematic three-dimensional structure diagram at the liquid storage tank;

[0030] Figure 10 It is a schematic three-dimensional structure diagram at the limit plate.

[0031] In the figure: 1, conveyor belt; 2, frame; 3, frame body; 4, motor one; 5, first threaded rod; 6, first slide rod; 7, lifting plate; 8, liquid storage tank; 9, displacement frame; 10, second threaded rod; 11, motor two; 12, motor three; 13, first bidirectional threaded rod; 14, second slide rod; 15, clamping plate; 16, third threaded rod; 17, motor four; 18, first groove plate; 19, fourth threaded rod; 20, motor five; 21, lifting rod; 22, plate body; 23, pump body; 24, long pipe; 25, branch pipe; 26, third slide rod; 27, electric push rod; 28, inclined groove plate; 29, liquid injection head; 30, limit plate; 31, slider; 32, motor six; 33, fifth threaded rod; 34, fixed rod; 35, extension plate; 36, motor seven; 37, gear; 38, chute rod; 39, guide post; 40, liquid collection plate; 41, motor eight; 42, second bidirectional threaded rod; 43, motor nine; 44, adjusting post; 45, second groove plate. Specific embodiments

[0032] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the scope of protection of the present invention.

[0033] Please refer to Figures 1 - 10 For this, the present invention provides a technical solution: a liquid injection device for lithium battery production, including a frame 2, on which a conveyor belt 1 is arranged. One side of the upper end of the frame 2 is fixedly connected with a frame body 3. At both ends of one side of the frame body 3, a first sliding rod 6 is fixedly connected. The first sliding rod 6 is slidably connected with a lifting plate 7. One side of the lower end surface of the lifting plate 7 is fixedly connected with a limiting plate 30. A plurality of sliders 31 are slidably connected on the limiting plate 30. One side of the slider 31 is fixedly connected with an adjusting column 44. One end of the adjusting column 44 is fixedly connected with a liquid injection head 29. The frame 2 is also provided with a liquid injection tray gap filling mechanism for preventing electrolyte from dripping onto the liquid injection tray.

[0034] The liquid injection tray gap filling mechanism includes a first groove plate 18 slidably connected to one side of the upper end of the frame 2. A lifting rod 21 is slidably connected at the chute of the first groove plate 18. One end of the lifting rod 21 is rotatably provided with a second groove plate 45. A liquid collecting plate 40 is fixedly connected to the lower end of the second groove plate 45. Extension plates 35 are inserted and slidably connected to both sides of the liquid collecting plate 40.

[0035] In this embodiment, as Figures 1 - 2 、 Figures 8 - 10 shown, one side of the upper end surface of the lifting plate 7 is fixedly connected with a liquid storage tank 8. One side of the front end of the liquid storage tank 8 is communicated and fixedly connected with a pump body 23. The liquid outlet end of the pump body 23 is communicated with a long pipe 24. A plurality of branch pipes 25 are communicated on one side of the long pipe 24. One end of the branch pipe 25 is communicated with the liquid injection head 29. An electromagnetic valve is arranged on the liquid injection head 29.

[0036] A third sliding rod 26 is slidably connected to one side of the lifting plate 7. The lower end of the third sliding rod 26 is fixedly connected with an inclined groove plate 28. A plurality of inclined grooves are arranged on the inclined groove plate 28. The adjusting column 44 passes through the inclined grooves on the inclined groove plate 28 and is slidably connected therewith. One side of the upper end surface of the lifting plate 7 is fixedly connected with an electric push rod 27. The piston end of the electric push rod 27 is fixedly connected with one side of the inclined groove plate 28.

[0037] The frame 2 is also provided with an auxiliary displacement mechanism for clamping the liquid injection tray.

[0038] The auxiliary displacement mechanism includes a displacement frame 9 slidably connected to one side of the upper end of the frame 2. Both ends of the displacement frame 9 are fixedly connected with second sliding rods 14. Clamping plates 15 are slidably connected to both sides of the second sliding rods 14.

[0039] One end of the frame 2 is threadedly connected with a second threaded rod 10. 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 with a second motor 11. The output end of the second motor 11 is fixedly connected with one end of the second threaded rod 10. Both ends of the displacement frame 9 are rotatably provided with a first bidirectional threaded rod 13. Both sides of the first bidirectional threaded rod 13 are threadedly connected with the clamping plates 15. One side of the displacement frame 9 is fixedly connected with a third motor 12. The output end of the third motor 12 is fixedly connected with one end of the first bidirectional threaded rod 13.

[0040] One side of the lifting plate 7 is threadedly connected with a first threaded rod 5. Both ends of the first threaded rod 5 are rotatably arranged on the frame body 3. One side of the upper end surface of the frame body 3 is fixedly connected with a first motor 4, and the output end of the first motor 4 is fixedly connected with one end of the first threaded rod 5.

[0041] Specifically, place the liquid injection tray containing multiple lithium batteries on the conveyor belt 1. The conveyor belt 1 drives the liquid injection tray to move. When one side of the liquid injection tray is between two clamping plates 15, use the third motor 12 to drive the first bidirectional threaded rod 13 to rotate, so that the two clamping plates 15 approach each other to clamp the liquid injection tray, and the liquid injection tray can be fixed and is in the middle position of the conveyor belt 1. And the lithium batteries in the middle of each row are aligned with the middle liquid injection heads 29. Then, according to the distance between adjacent lithium batteries on the liquid injection tray, use the electric push rod 27 to drive the inclined groove plate 28 to lift. Since the adjusting column 44 passes through the inclined groove on the inclined groove plate 28, when the inclined groove plate 28 moves up and down, the adjusting column 44 will also move accordingly. Thus, the sliders 31 except those in the middle can slide on the limiting plate 30 at the same time, so that the distance between multiple liquid injection heads 29 changes equally. And part of the branch pipe 25 is a flexible pipe, which can adapt to this change until the distance between adjacent liquid injection heads 29 is equal to the distance between adjacent lithium batteries. Then, according to the number of lithium batteries in one row, if the number of lithium batteries is less than the number of liquid injection heads 29, close the solenoid valves on the liquid injection heads 29 that are not aligned with the lithium batteries. Then, by driving the first threaded rod 5 to rotate through the first motor 4, the lifting plate 7 descends, so that multiple liquid injection heads 29 extend into the lithium batteries. Then, use the pump body 23 to pump out the electrolyte in the liquid storage tank 8, and inject it into the lithium batteries through the long pipe 24, the branch pipe 25, and the liquid injection heads 29. Then, drive the liquid injection tray to move intermittently, so that the electrolyte can be injected into each row of lithium batteries. At the same time, by driving the second threaded rod 10 to rotate through the second motor 11, the clamping plates 15 move synchronously with the liquid injection tray to ensure the stability of the liquid injection tray. Thus, the distance between the liquid injection heads 29 can be adjusted according to the distance between adjacent lithium batteries in each row to ensure that each liquid injection head is aligned with the lithium battery, and further can adapt to different use requirements and improve the liquid injection efficiency.

[0042] In this embodiment, as Figures 2 - 7 shown, one side of the lower end of the first groove plate 18 is threadedly connected with a third threaded rod 16. Both ends of the third threaded rod 16 are rotatably arranged on the frame 2. One side of the upper end of the frame 2 is fixedly connected with a fourth motor 17, and the output end of the fourth motor 17 is fixedly connected with one end of the third threaded rod 16. One end of the lifting rod 21 is threadedly connected with a fourth threaded rod 19. Both ends of the fourth threaded rod 19 are rotatably arranged on the first groove plate 18. The upper end of the first groove plate 18 is fixedly connected with a fifth motor 20, and the output end of the fifth motor 20 is fixedly connected with one end of the fourth threaded rod 19.

[0043] One end of the lifting rod 21 is fixedly connected with an eighth motor 41, and the output end of the eighth motor 41 is fixedly connected with one side of the second groove plate 45.

[0044] On both sides of one end of the second channel plate 45, chute rods 38 are rotatably arranged. On one side of the extension plate 35, a guide post 39 is fixedly connected. The guide post 39 passes through the chute of the chute rod 38 and is slidably connected thereto. One end of the chute rod 38 is fixedly connected with a gear 37. The two gears 37 are meshed with each other. On one side of the lower end of the second channel plate 45, a seventh motor 36 is fixedly connected. The output end of the seventh motor 36 is fixedly connected with one end of the chute rod 38.

[0045] A fixed rod 34 is slidably connected to the upper chute of the second channel plate 45. On both sides of the fixed rod 34, plate bodies 22 are slidably connected. On one side of the upper end of the plate body 22, a second bidirectional threaded rod 42 is threadedly connected. Both ends of the second bidirectional threaded rod 42 are rotatably arranged on the fixed rod 34. One end of the fixed rod 34 is fixedly connected with a ninth motor 43. The output end of the ninth motor 43 is fixedly connected with one end of the second bidirectional threaded rod 42. On one side of the fixed rod 34, a fifth threaded rod 33 is threadedly connected. Both ends of the fifth threaded rod 33 are rotatably arranged on the second channel plate 45. On the upper end of the second channel plate 45, a sixth motor 32 is fixedly connected. The output end of the sixth motor 32 is fixedly connected with one end of the fifth threaded rod 33.

[0046] Specifically, in the prior art, lithium batteries that need to be filled with liquid are usually arranged in multiple rows at equal intervals on a filling tray, and the filling tray is placed on the conveyor belt 1. The conveyor belt 1 drives the filling tray to move, and the filling head 29 is used to fill each row of lithium batteries in turn. Although the filling efficiency can be improved in this way, however, since there are gaps between each row of lithium batteries, when a row of lithium batteries is filled and the filling head 29 is aligned with the next row of lithium batteries by driving the filling tray to move, the liquid outlet end of the filling head 29 will be aligned with the gap between two rows of lithium batteries for a period of time. Usually, there will be residual electrolyte at the end of the filling head 29 every time it completes a filling. When the liquid outlet end of the filling head 29 is aligned with the gap between two rows of lithium batteries, this electrolyte may drip onto the filling tray, which not only easily causes the filling tray to be contaminated and affects subsequent use, but also causes waste of the electrolyte;

[0047] Therefore, to avoid the above problems, during the use of this embodiment, when a row of lithium batteries is aligned with the liquid injection head 29, the lifting rod 21 is lowered by driving the rotation of the threaded rod four 19 by the fifth motor 20, so that the liquid collecting plate 40 is placed between two rows of lithium batteries in a centered manner. Then, by driving the rotation of the chute rod 38 and the gear 37 by the seventh motor 36, the chute rods 38 on both sides rotate simultaneously and in different directions, so that the extension plate 35 slides on the liquid collecting plate 40 until the end of the extension plate 35 fits the upper edge of the two rows of lithium batteries. When a row of lithium batteries is filled with liquid and the liquid injection tray continues to move, the first chute plate 18 will also be displaced synchronously under the action of driving the rotation of the threaded rod three 16 by the fourth motor 17. During the movement of the liquid injection head 29 from above one row of lithium batteries to above another row of lithium batteries, even if the electrolyte drips from the end of the liquid injection head 29, it will only drip onto the extension plate 35 and the liquid collecting plate 40, rather than onto the liquid injection tray. Then, repeat the above operation. After each row of lithium batteries is filled with liquid, the liquid injection head 29 rises, the liquid collecting plate 40 moves upward and out, and is placed between another two rows of lithium batteries again, thus avoiding the situation that 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, ensuring the cleanliness of the liquid injection tray and facilitating subsequent use. And, a collection container can be placed at the end of the liquid collecting plate 40, and by driving the rotation of the liquid collecting plate 40 by the eighth motor 41 to make it tilt, the electrolyte on the liquid collecting plate 40 will slide down along the angle of the liquid collecting plate 40 into the collection container, realizing the recycling of the electrolyte and avoiding the waste of the electrolyte;

[0048] Although the above method can avoid the electrolyte from falling onto the liquid injection tray, however, when the liquid injection head 29 and the liquid injection tray have relative displacement, 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, so the electrolyte may remain here, which also affects the cleanliness of the surface of the lithium battery and causes waste of the electrolyte. Therefore, to avoid this situation, whenever the liquid injection head 29 completes one liquid injection and the liquid injection head 29 is aligned with another row of lithium batteries, the threaded rod five 33 is lowered by driving the sixth motor 32, so that the plate body 22 is lowered to a position flush with the upper edge of the lithium battery at the bottom. Then, by driving the rotation of the bidirectional threaded rod two 42 by the ninth motor 43, the two plate bodies 22 slide simultaneously and approach each other. Since the initial positions of the two plate bodies 22 are on both sides of the extension plate 35, when the two plate bodies 22 approach each other, they will scrape the upper edges of the lithium batteries on both sides of the liquid collecting plate 40, scraping the electrolyte on the upper edge of the lithium battery onto the liquid collecting plate 40, thus realizing another recycling of the electrolyte and avoiding the situation that when the liquid injection head 29 and the liquid injection tray have relative displacement, due to the end of the liquid injection head 29 being aligned with the side where the upper edges of the two rows of lithium batteries are close to each other, the electrolyte remains here, affecting the cleanliness of the surface of the lithium battery and causing waste of the electrolyte.

[0049] Working principle: Place the liquid injection tray equipped with multiple lithium batteries on the conveyor belt 1. 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 three 12 drives the bidirectional threaded rod one 13 to rotate, making the two clamping plates 15 approach each other to clamp the liquid injection tray, so that the liquid injection tray can be fixed and is in the center position of the conveyor belt 1, and the lithium batteries in the middle of each row are aligned with the liquid injection heads 29 in the middle. Then, according to the distance between adjacent lithium batteries in each row on the liquid injection tray, the electric push rod 27 drives the inclined groove plate 28 to rise and fall. Since the adjusting column 44 passes through the inclined groove on the inclined groove plate 28, when the inclined groove plate 28 moves up and down, the adjusting column 44 will also move accordingly, so that the sliders 31 except those in the middle can slide on the limiting plate 30 at the same time, making the distance between multiple liquid injection heads 29 change equally, and the branch pipe 25 is partially a flexible hose, which can adapt to this change until the distance between adjacent liquid injection heads 29 is equal to the distance 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 liquid injection heads 29, close the solenoid valve on the liquid injection head 29 that is not aligned with the lithium battery, and then drive the threaded rod one 5 to rotate by the motor one 4, so that the lifting plate 7 descends, making multiple liquid injection heads 29 extend into the lithium batteries. Then, use the pump body 23 to pump out the electrolyte in the liquid storage tank 8, and inject it into the lithium batteries through the long pipe 24, branch pipe 25, and liquid injection head 29. Then, drive the liquid injection tray to move intermittently, so that the electrolyte can be injected into each row of lithium batteries. At the same time, drive the threaded rod two 10 to rotate by the motor two 11, so that the clamping plate 15 moves synchronously with the liquid injection tray to ensure the stability of the liquid injection tray. Thus, the distance between the liquid injection heads 29 can be adjusted according to the distance between adjacent lithium batteries in each row to ensure that each liquid injection head is aligned with the lithium battery, and further can adapt to different usage requirements, improving the liquid injection efficiency. When a row of lithium batteries is aligned with the liquid injection heads 29, drive the threaded rod four 19 to rotate by the motor five 20, so that the lifting rod 21 descends, making the liquid collection plate 40 be placed between two rows of lithium batteries in a centered manner. Then, drive the chute rod 38 and the gear 37 to rotate by the motor seven 36, so that the two chute rods 38 on both sides rotate in different directions at the same time, making the extension plate 35 slide on the liquid collection plate 40 until the end of the extension plate 35 fits the upper edge of the two rows of lithium batteries. When a row of lithium batteries is finished with liquid injection and the liquid injection tray continues to move, the chute plate one 18 will also move synchronously under the drive of the motor four 17 driving the threaded rod three 16. During the period when the liquid injection head 29 moves from above one row of lithium batteries to above another row of lithium batteries, even if the electrolyte drips from the end of the liquid injection head 29, it will only drip onto the extension plate 35 and the liquid collection plate 40, and will not drip onto the liquid injection tray. Then, repeat the above operations. After each row of lithium batteries is finished with liquid injection, the liquid injection head 29 rises, the liquid collection plate 40 moves up and out, and is placed between two other rows of lithium batteries again, thus avoiding the situation that 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, ensuring the cleanliness of the liquid injection tray and facilitating subsequent use. And,A collection container can be placed at the end of the liquid collection plate 40. By driving the liquid collection plate 40 to rotate with the motor eight 41, it is tilted, and the electrolyte on the liquid collection plate 40 will slide down along the angle of the liquid collection plate 40 into the collection container, realizing the recycling 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 have a relative displacement, 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. Then, the electrolyte may remain here, which also affects the cleanliness of the surface of the lithium battery and causes waste of the electrolyte. Therefore, to avoid this situation, every 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 six 32 drives the threaded rod five 33 to descend, so that the plate body 22 descends to a position flush with the upper edge of the lithium battery at the bottom. Then, by driving the double-threaded rod two 42 to rotate with the motor nine 43, the two side plate bodies 22 slide and approach each other simultaneously. Since the initial positions of the two plate bodies 22 are on both sides of the extension plate 35, when the two plate bodies 22 approach each other, they will scrape the upper edges of the lithium batteries on both sides of the liquid collection plate 40, scraping the electrolyte on the upper edges of the lithium batteries onto the liquid collection plate 40, thus realizing another recycling of the electrolyte and avoiding the situation where when the liquid injection head 29 and the liquid injection tray have a relative displacement, the end of the liquid 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 here, affecting the cleanliness of the surface of the lithium battery, and causing waste of the electrolyte.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection device for lithium battery production, comprising a frame (2), characterized in that: A conveyor belt (1) is provided on the frame (2). One side at the upper end of the frame (2) is fixedly connected to a frame body (3). Both ends on one side of the frame body (3) are fixedly connected to a first sliding rod (6). The first sliding rod (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 limiting plate (30). A plurality of sliders (31) are slidably connected to the limiting plate (30). One side of the slider (31) is fixedly connected to an adjusting column (44). One end of the adjusting column (44) is fixedly connected to a liquid injection head (29). A liquid injection tray gap filling mechanism for preventing electrolyte from dripping onto the liquid injection tray is further provided on the frame (2). The liquid injection tray gap filling mechanism includes a first groove plate (18) slidably connected to one side of the upper end of the frame (2). A lifting rod (21) is slidably connected to the chute of the first groove plate (18). One end of the lifting rod (21) is rotatably provided with a second groove plate (45). A liquid collecting plate (40) is fixedly connected to the lower end of the second groove plate (45). Extension plates (35) are inserted and slidably connected to both sides of the liquid collecting plate (40). One side of the lower end of the first groove plate (18) is threadedly connected with a third threaded rod (16). Both ends of the third threaded rod (16) are rotatably provided on the frame (2). A fourth motor (17) is fixedly connected to one side of the upper end of the frame (2). The output end of the fourth motor (17) is fixedly connected to one end of the third threaded rod (16). One end of the lifting rod (21) is threadedly connected with a fourth threaded rod (19). Both ends of the fourth threaded rod (19) are rotatably provided on the first groove plate (18). A fifth motor (20) is fixedly connected to the upper end of the first groove plate (18). The output end of the fifth motor (20) is fixedly connected to one end of the fourth threaded rod (19). One end of the lifting rod (21) is fixedly connected to an eighth motor (41). The output end of the eighth motor (41) is fixedly connected to one side of the second groove plate (45). Chute rods (38) are rotatably provided on both sides of one end of the second groove plate (45). A guide post (39) is fixedly connected to one side of the extension plate (35). The guide post (39) passes through the chute of the chute rod (38) and is slidably connected thereto. One end of the chute rod (38) is fixedly connected to a gear (37). The two gears (37) are meshed with each other. A seventh motor (36) is fixedly connected to one side of the lower end of the second groove plate (45). The output end of the seventh motor (36) is fixedly connected to one end of the chute rod (38). A fixed rod (34) is slidably connected to the upper chute of the second groove plate (45). Plate bodies (22) are slidably connected to both sides of the fixed rod (34). One side of the upper end of the plate body (22) is threadedly connected with a second bidirectional threaded rod (42). Both ends of the second bidirectional threaded rod (42) are rotatably provided on the fixed rod (34). A ninth motor (43) is fixedly connected to one end of the fixed rod (34). The output end of the ninth motor (43) is fixedly connected to one end of the second bidirectional threaded rod (42). One side of the fixed rod (34) is threadedly connected with a fifth threaded rod (33). Both ends of the fifth threaded rod (33) are rotatably provided on the second groove plate (45). A sixth motor (32) is fixedly connected to the upper end of the second groove plate (45). The output end of the sixth motor (32) is fixedly connected to one end of the fifth threaded rod (33).

2. The liquid injection device for lithium battery production according to claim 1, wherein: One side of the upper end surface of the lifting plate (7) is fixedly connected with a liquid storage tank (8). One side of the front end of the liquid storage tank (8) is communicated and fixedly connected with a pump body (23). The liquid outlet end of the pump body (23) is communicated with a long pipe (24). A plurality of branch pipes (25) are communicated with one side of the long pipe (24). One end of the branch pipe (25) is communicated with an injection head (29). An electromagnetic valve is arranged on the injection head (29).

3. The 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 the third slide bar (26). The lower end of the third slide bar (26) is fixedly connected to an inclined groove plate (28). A plurality of inclined grooves are provided on the inclined groove plate (28). The adjusting column (44) passes through the inclined grooves on the inclined groove 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 groove plate (28).

4. A liquid injection device for lithium battery production according to claim 1, characterized in that: An auxiliary displacement mechanism for clamping the liquid injection tray is further provided on the frame (2); The auxiliary displacement mechanism includes a displacement frame (9) slidably connected to one side of the upper end of the frame (2). Both ends of the displacement frame (9) are fixedly connected to the second slide bars (14). Clamping plates (15) are slidably connected to both sides of the second slide bars (14).

5. The liquid injection device for lithium battery production according to claim 4, wherein: One end of the frame (2) is threadedly connected to a second threaded rod (10). 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). The output end of the second motor (11) is fixedly connected to one end of the second threaded rod (10). Both ends of the displacement frame (9) are rotatably provided with a first bidirectional threaded rod (13). Both sides of the first bidirectional threaded rod (13) are threadedly connected to the clamping plates (15). One side of the displacement frame (9) is fixedly connected to a third motor (12). The output end of the third motor (12) is fixedly connected to one end of the first bidirectional threaded rod (13).

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

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