An encapsulation device and an encapsulation method for lithium battery production

Abstract

The present invention discloses a packaging device and a packaging method for lithium battery production, belonging to the technical field of lithium battery production; it includes a workbench, a placement table is rotatably installed on the workbench, a hydraulic rod is fixedly installed in the workbench, the output end of the hydraulic rod is fixedly connected with a first connecting plate, and the first connecting plate is rotatably connected with a pressure cylinder. During the packaging process of the present invention, under the action of the hydraulic rod and the pressure cylinder, a continuous pressure can be formed on the packaging area of the outer shell. While the effect is stable, after the packaging operation is completed, the motor can be started to drive the hammer head to move up and down. The hammer head and the outer shell are in intermittent contact, which can form a hammering effect on the outer shell and facilitate subsequent detection. During this process, under the action of the first pressure sensor, a simple detection of the outer shell surface can also be carried out, achieving multiple benefits with one action.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production, and particularly relates to a packaging device and a packaging method for lithium battery production. Background Art

[0002] A lithium battery is a type of battery with lithium metal or lithium alloy as the positive / negative electrode material and using a non-aqueous electrolyte solution. It is a power source that is currently widely used. In the processing of lithium batteries, especially in the last step of the welding process, the packaging operation of the battery shell is mainly completed by resistance welding. Using the method of resistance welding for processing has high productivity, small deformation of the welded parts, and is easy to automate;

[0003] However, in the actual processing process, during the resistance welding process, it is mainly pressed manually, which is time-consuming and laborious. Sometimes, if not careful, the pressing force is too large, which will cause damage to the lithium battery. And after the packaging operation is completed, it is necessary to use manual methods to detect the packaging effect. Using the naked eye for detection, the detection effect is average, and it cannot detect whether there is a soft connection phenomenon at the packaging position. At the same time, after the detection is completed, it is also necessary to use manual methods to use tools such as sandpaper to frictionally process the relatively protruding parts during packaging, which is very troublesome as a whole. Therefore, a packaging device and a packaging method for lithium battery production are provided. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and a packaging device and a packaging method for lithium battery production are proposed.

[0005] The present invention adopts the following technical solutions:

[0006] A packaging device for lithium battery production, including a workbench, a placement table is rotatably installed on the workbench, a hydraulic rod is fixedly installed inside the workbench, the output end of the hydraulic rod is fixedly connected to a first connecting plate, the first connecting plate is rotatably connected to a pressure cylinder, a first detection component for detecting the firmness after the lithium battery is packaged is installed on the upper side of the workbench. The first detection component includes a ninth connecting plate fixedly installed on the outside of the pressure cylinder. A plurality of rotating cylinders are rotatably connected inside the ninth connecting plate. A second threaded rod is threadedly connected inside each rotating cylinder. The second threaded rod slidably penetrates through the ninth connecting plate. A hammer head is slidably connected to the lower side of the second threaded rod. A second spring is fixedly connected between the hammer head and the second threaded rod. A first pressure sensor is also fixedly connected between the hammer head and the second threaded rod. A control component for controlling the reciprocating movement of the hammer head is installed on the lower side of the first connecting plate.

[0007] Preferably, the control component includes a motor rotatably installed in the workbench. A rotating shaft is fixedly installed at the output end of the motor. A second gear is fixedly connected to the outer side of the pressure cylinder. A first gear is rotatably connected to the lower side of the first connecting plate. The rotating shaft penetrates through the first connecting plate and is slidably connected to the first gear. The first gear meshes with the second gear. A fixed cover is rotatably connected to the lower side of the second gear. The fixed cover is fixedly connected to the first connecting plate through a fourth connecting rod. A plurality of arc-shaped racks are fixedly connected inside the fixed cover. A toothed ring is fixedly connected to the outer side of each rotating cylinder. The number of toothed rings corresponds to that of the arc-shaped racks. The upper side of the second threaded rod is rotatably connected to the second connecting plate. A first spring is fixedly connected to the upper side of the second connecting plate. One end of the first spring away from the second connecting plate is fixedly connected to a connecting rod. The connecting rod is slidably connected to the fixed cover.

[0008] Preferably, a second detection component for detecting the encapsulation weld seam is installed on the outer side of the fixed cover. The second detection component includes a fixed frame fixedly installed on the side wall of the fixed cover. Two first sliding plates are slidably connected inside the fixed frame. A third spring is fixedly connected between the two first sliding plates and the fixed frame. A square rod is slidably connected to the side walls of the two first sliding plates. One end of the square rod is fixedly connected to a fourth connecting plate. A fourth spring is fixedly connected between the fourth connecting plate and the first sliding plate. A detection rod is fixedly connected to the outer side of the fourth connecting plate. A third connecting plate is fixedly connected to the other side of the square rod. A second pressure sensor is fixedly connected between the third connecting plate and the first sliding plate.

[0009] Preferably, an impact component is installed inside the fixed frame. The impact component includes a second sliding plate slidably installed inside the fixed frame. A fifth spring is fixedly connected between the second sliding plate and the fixed frame. A fifth connecting plate is fixedly connected to the lower side of the second sliding plate. A second connecting rod is slidably connected to the lower side of the fifth connecting plate. A third connecting rod is fixedly connected to the upper side of the second connecting rod. A sixth connecting plate is fixedly connected to the upper side of the third connecting rod. A sixth spring is fixedly connected between the sixth connecting plate and the fifth connecting plate. A round rod is fixedly connected to the lower side of the second connecting rod. A frustum is fixedly connected to the outer side of each second threaded rod.

[0010] Preferably, an elimination component for eliminating a relatively thick weld seam is installed on the outer side of the fifth connecting plate. The elimination component includes sandpaper fixedly sleeved on the outer side of the round rod. An electric push rod is fixedly connected to the side wall of the second sliding plate. A push plate is fixedly connected to the output end of the electric push rod. A seventh connecting plate is slidably connected to the upper side of the sixth connecting plate. An eighth connecting plate is fixedly connected to the lower side of the seventh connecting plate. A seventh spring is fixedly connected between the eighth connecting plate and the sixth connecting plate. A collar is fixedly connected to the outer side of each frustum. A moving ring is slidably connected to the outer sides of the collars together. A button is fixedly connected to the side wall of the third connecting plate.

[0011] Preferably, the rotating shaft is drivingly connected to the placing table through a pulley assembly.

[0012] Preferably, a conductive sheet is fixedly connected to the upper side of the placing table, and two placing frames are fixedly installed on the front side of the workbench. Electric welding pens are placed in both of the two placing frames.

[0013] Preferably, a clamping assembly is installed on the upper side of the workbench. The clamping assembly includes a first threaded rod rotatably installed in the workbench. Two threaded rings are threadedly connected to the outer side of the first threaded rod. The upper sides of the two threaded rings are fixedly connected to a first connecting rod. The first connecting rod is slidably connected to the workbench. The upper side of the first connecting rod is fixedly connected to an arc-shaped clamping plate.

[0014] A packaging method for a packaging device used in lithium battery production includes the following steps:

[0015] S1. Place the outer shell on the placing table and put the battery cell into the outer shell.

[0016] S2. Seal the outer shell.

[0017] S3. Start the first pressure sensor to make the pressure cylinder abut against the outer shell.

[0018] S4. Start resistance welding.

[0019] S5. After welding is completed, remove the packaged lithium battery.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. First, during the packaging process, under the action of the hydraulic rod and the pressure cylinder, a continuous pressure can be formed on the packaging area of the outer shell. While the effect is stable, after the packaging operation is completed, the motor can be started to drive the hammer head to move up and down. The hammer head intermittently contacts the outer shell, which can form a knocking effect on the outer shell and facilitate subsequent detection. During this process, under the action of the first pressure sensor, a simple detection of the outer shell surface can also be performed, achieving multiple benefits at once.

[0022] 2. Second, under the action of the second pressure sensor, if the magnitude of the electrical signal emitted by the second pressure sensor has been within a reasonable range, it indicates that the welding condition is good. If the magnitude of the electrical signal emitted by the second pressure sensor is high and low, it indicates that the welding quality is poor, thereby completing a simple detection of the welding position of the outer shell.

[0023] 3. Then, during the above working process, the round rod can form an impact effect on the welding area on the outer side of the outer shell. Through the impact of the round rod, the solder with a general connection effect in the welding area on the outer side of the outer shell can be effectively cleaned, and the detection effect of the second pressure sensor can be improved.

[0024] 4. Finally, when poor welding quality is detected, the round rod can be driven to move the sandpaper up and down. When the paper abuts against the welding area on the outer side of the housing, a frictional effect on the welding area on the outer side of the housing will be formed, and then a frictional cleaning effect on the protrusions in the welding area on the outer side of the housing can be formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a packaging device for lithium battery production proposed by the present invention;

[0026] Figure 2 is a schematic structural diagram of a clamping assembly in a packaging device for lithium battery production proposed by the present invention;

[0027] Figure 3 is a schematic connection diagram of gear one and gear two in a packaging device for lithium battery production proposed by the present invention;

[0028] Figure 4 is a schematic connection diagram of gear one and gear two at another angle in a packaging device for lithium battery production proposed by the present invention;

[0029] Figure 5 is a schematic internal connection diagram of a fixed cover in a packaging device for lithium battery production proposed by the present invention;

[0030] Figure 6 is a schematic connection diagram of a rotating cylinder and a second threaded rod in a packaging device for lithium battery production proposed by the present invention;

[0031] Figure 7 is a schematic unfolded connection diagram of a rotating cylinder, a second threaded rod, and a hammer head in a packaging device for lithium battery production proposed by the present invention;

[0032] Figure 8 is a schematic bottom view connection diagram of a fixed frame and a moving ring in a packaging device for lithium battery production proposed by the present invention;

[0033] Figure 9 is a schematic connection diagram of a fixed frame and a moving ring in a packaging device for lithium battery production proposed by the present invention;

[0034] Figure 10 is a schematic connection diagram of a fixed frame and a first slide plate in a packaging device for lithium battery production proposed by the present invention;

[0035] Figure 11 is a schematic structural diagram of a second slide plate in a packaging device for lithium battery production proposed by the present invention;

[0036] Figure 12 is Figure 11 an enlarged structural view of part A in

[0037] In the figure: 1 workbench, 2 placement table, 3 arc-shaped clamping plate, 4 first threaded rod, 5 threaded ring, 6 hydraulic rod, 7 first connecting plate, 8 second gear, 9 pressure cylinder, 10 motor, 11 rotating shaft, 12 first gear, 13 pulley assembly, 14 fixed cover, 15 hammer head, 16 fixed frame, 17 arc-shaped rack, 18 toothed ring, 19 first spring, 20 rotating cylinder, 21 second threaded rod, 22 second connecting plate, 23 frustum, 24 fixed ring, 25 first pressure sensor, 26 second spring, 27 moving ring, 28 second sliding plate, 29 first sliding plate, 30 round rod, 31 third spring, 32 detection rod, 33 square rod, 34 third connecting plate, 35 button, 36 fourth connecting plate, 37 fourth spring, 38 second pressure sensor, 39 fifth spring, 40 fifth connecting plate, 41 second connecting rod, 42 third connecting rod, 43 sixth connecting plate, 44 electric push rod, 45 push plate, 46 sixth spring, 47 seventh connecting plate, 48 eighth connecting plate, 49 seventh spring, 50 fourth connecting rod, 51 ninth connecting plate. Specific implementation manner

[0038] Refer to Figures 1 - 12 , a packaging device for lithium battery production, including a workbench 1. An illuminating lamp is fixedly installed on the upper side inside the workbench 1. A placement table 2 is rotatably installed on the workbench 1. A conductive sheet is fixedly connected to the upper side of the placement table 2. Two placement frames are fixedly installed on the front side of the workbench 1. Electric welding pens are placed in both of the two placement frames. A clamping assembly is further installed on the upper side of the workbench 1. The clamping assembly includes a first threaded rod 4 rotatably installed inside the workbench 1. Two threaded rings 5 are threadedly connected to the outer side of the first threaded rod 4. A first connecting rod is fixedly connected to the upper sides of the two threaded rings 5. The first connecting rod is slidably connected to the workbench 1. An arc-shaped clamping plate 3 is fixedly connected to the upper side of the first connecting rod. A hydraulic rod 6 is fixedly installed inside the workbench 1. The output end of the hydraulic rod 6 is fixedly connected to a first connecting plate 7. A pressure cylinder 9 is rotatably connected to the lower side of the first connecting plate 7;

[0039] First, the pressure cylinder 9 is located above the placement table 2 and is opposite to the placement table 2. Moreover, both the conductive sheet and the electric welding pen are electrically connected to the workbench 1 through wires. Secondly, when lithium batteries need to be encapsulated, first place the outer shell on the conductive sheet above the placement table 2. Since the thread directions on both sides of the first threaded rod 4 are opposite, and the threaded ring 5, the first connecting rod, and the arc-shaped clamping plate 3 are fixedly connected, rotating the first threaded rod 4 will cause the arc-shaped clamping plates 3 to move towards each other until they abut against the outer shell, thereby completing the clamping and fixing operation of the outer shell. Immediately afterwards, perform the placement operations in sequence. After the placement operations are completed, start the hydraulic rod 6. The hydraulic rod 6 drives the first connecting plate 7 and the pressure cylinder 9 to move downward. When the pressure cylinder 9 abuts against the outer shell, continue to start the pressure cylinder 9 until the pressure cylinder 9 can apply a certain pressure to the outer shell. Then, turn off the hydraulic rod 6. Since the hydraulic rod 6 has a self-locking function, even if the hydraulic rod 6 is turned off, the force exerted by the pressure cylinder 9 on the outer shell will not change. Immediately afterwards, start resistance welding. Pick up the electric welding pen and move the electric welding pen to the corresponding working position. Start the electric welding pen through the workbench 1 to form a closed circuit among the electric welding pen, the outer shell, and the conductive sheet, and start the welding operation. After the welding operation is completed, rotate the first threaded rod 4 again to disconnect the arc-shaped clamping plates 3 from the outer shell, and then take out the encapsulated lithium battery to finally complete the encapsulation work of the lithium battery. During the above processing process, the lighting lamp can be started to play a certain auxiliary effect on the processing process. The above are all prior arts and will not be elaborated further;

[0040] On the upper side of the workbench 1, a first detection component for detecting the firmness after the lithium battery is encapsulated is installed. The first detection component includes a connecting plate nine 51 fixedly installed on the outer side of the pressure cylinder 9. A plurality of rotating cylinders 20 are rotatably connected inside the connecting plate nine 51. A second threaded rod 21 is threadedly connected inside each rotating cylinder 20. The second threaded rod 21 slidably penetrates through the connecting plate nine 51. A hammer head 15 is slidably connected to the lower side of the second threaded rod 21. A second spring 26 is fixedly connected between the hammer head 15 and the second threaded rod 21. A first pressure sensor 25 is also fixedly connected between the hammer head 15 and the second threaded rod 21. A control component for controlling the reciprocating movement of the hammer head 15 is installed on the lower side of the connecting plate one 7. The control component includes a motor 10 rotatably installed inside the workbench 1. The output end of the motor 10 is fixedly installed with a rotating shaft 11. A second gear 8 is fixedly connected to the outer side of the pressure cylinder 9. A first gear 12 is rotatably connected to the lower side of the connecting plate one 7. The rotating shaft 11 penetrates through the connecting plate one 7 and is slidably connected to the first gear 12. The first gear 12 and the second gear 8 are meshed with each other. A fixed cover 14 is rotatably connected to the lower side of the second gear 8. The fixed cover 14 is fixedly connected to the connecting plate one 7 through a fourth connecting rod 50. A plurality of arc-shaped racks 17 are fixedly connected inside the fixed cover 14. A toothed ring 18 is fixedly connected to the outer side of each rotating cylinder 20. The number of toothed rings 18 is opposite to that of the arc-shaped racks 17. The upper side of the second threaded rod 21 is rotatably connected to a connecting plate two 22. A first spring 19 is fixedly connected to the upper side of the connecting plate two 22. One end of the first spring 19 far from the connecting plate two 22 is fixedly connected to a connecting rod. The connecting rod is slidably connected to the fixed cover 14;

[0041] First, the pressure sensor 25 is a component that can sense pressure signals and convert them into electrical signals, which belongs to the prior art. Second, before the resistance welding operation, the position of the pressure cylinder 9 is adjusted by the hydraulic rod 6 so that the pressure cylinder 9 can exert pressure on the outer shell. Then, after the resistance welding operation is completed, the motor 10 is started. The motor 10 drives the rotating shaft 11 to rotate. The rotating shaft 11 drives the pressure cylinder 9 to rotate through the first gear 12 and the second gear 8. At the same time, the rotating shaft 11 also drives the placement table 2 to rotate through the pulley assembly 13. Under the dual action of the placement table 2 and the pressure cylinder 9, the lithium battery is driven to rotate. At the same time, since the fixed cover 14 is fixedly connected to the connecting plate 7 through the fourth connecting rod 50, the arc-shaped rack 17 fixedly connected to the fixed cover 14 is in a fixed state. At this time, the pressure cylinder 9 drives the ninth connecting plate 51 to rotate. The ninth connecting plate 51 drives the rotating cylinder 20 connected by rotation to rotate around the pressure cylinder 9. During this process, when the toothed ring 18 meshes with the arc-shaped rack 17, since the arc-shaped rack 17 is in a stationary state, the toothed ring 18 rotates. The toothed ring 18 drives the rotating cylinder 20 to rotate. Since the second threaded rod 21 is threadedly connected to the rotating cylinder 20 and the second threaded rod 21 is slidably connected to the ninth connecting plate 51, the rotating second threaded rod 21 will move upward or downward relative to the ninth connecting plate 51. Taking the downward movement of the second threaded rod 21 as an example, the second threaded rod 21 drives the second connecting plate 22 to move downward. The second connecting plate 22 stretches the first spring 19. At the same time, the second threaded rod 21 also drives the hammer head 15 to move downward through the second spring 26. When the hammer head 15 abuts against the outer shell, a certain force will be applied to the outer shell. At the same time, the pressure sensor 25 emits a corresponding electrical signal. When the connection between the arc-shaped rack 17 and the toothed ring 18 is disconnected, the toothed ring 18 loses the acting force of the arc-shaped rack 17. At this time, under the action of the stretched first spring 19, the second threaded rod 21 moves upward as a whole. The second threaded rod 21 drives the hammer head 15 to move upward. The connection between the hammer head 15 and the outer shell is disconnected until the toothed ring 18 meshes with the arc-shaped rack 17 again. Eventually, the hammer head 15 can form a knocking effect on the outer shell;

[0042] In the above working process, when the pressure sensor 25 emits an electrical signal, the magnitudes of the electrical signals emitted by all the pressure sensors 25 can be compared. If the magnitudes of the electrical signals emitted by all the pressure sensors 25 are the same or differ slightly, it indicates that the unevenness on the surface of the outer shell is small, and the deformation amount of the outer shell after resistance welding is small. Thus, a simple detection of the outer shell surface is completed. And in cooperation with the knocking of the hammer head 15, if during the detection process, the electrical signal emitted by the pressure sensor 25 suddenly changes, it indicates that the welding condition of the outer shell is average. Thus, various different detections of the outer shell are completed.

[0043] A second detection component for detecting the encapsulation weld seam is installed outside the fixed cover 14. The second detection component includes a fixed frame 16 fixedly installed on the side wall of the fixed cover 14. Two first slide plates 29 are slidably connected in the fixed frame 16. A third spring 31 is fixedly connected between the two first slide plates 29 and the fixed frame 16. A square rod 33 is slidably connected to the side walls of the two first slide plates 29. One end of the square rod 33 is fixedly connected to a fourth connecting plate 36. A fourth spring 37 is fixedly connected between the fourth connecting plate 36 and the first slide plate 29. A detection rod 32 is fixedly connected to the outside of the fourth connecting plate 36. A third connecting plate 34 is fixedly connected to the other side of the square rod 33. A second pressure sensor 38 is fixedly connected between the third connecting plate 34 and the first slide plate 29;

[0044] First, the function, structure, and principle of the second pressure sensor 38 are the same as those of the first pressure sensor 25, so no redundant elaboration will be made. Second, in the initial state, the detection rod 32 abuts against the side wall of the housing. After the resistance welding of the housing is completed, the detection rod 32 abuts against the welding area on the outside of the housing. When the housing rotates, the detection rod 32 always abuts against the welding area, and the third spring 31 is in a stretched state, and the fourth spring 37 is in a compressed state. The second pressure sensor 38 emits an electrical signal. During this process, the magnitude of the electrical signal emitted by the second pressure sensor 38 can be observed. If the magnitude of the electrical signal emitted by the second pressure sensor 38 always remains within a reasonable range, it indicates that the welding condition is good. If the magnitude of the electrical signal emitted by the second pressure sensor 38 fluctuates, it indicates that the welding quality is poor and the solder distribution is unreasonable.

[0045] An impact component is installed in the fixed frame 16. The impact component includes a second slide plate 28 slidably installed in the fixed frame 16. A fifth spring 39 is fixedly connected between the second slide plate 28 and the fixed frame 16. A fifth connecting plate 40 is fixedly connected to the lower side of the second slide plate 28. A second connecting rod 41 is slidably connected to the lower side of the fifth connecting plate 40. A third connecting rod 42 is fixedly connected to the upper side of the second connecting rod 41. A sixth connecting plate 43 is fixedly connected to the upper side of the third connecting rod 42. A sixth spring 46 is fixedly connected between the sixth connecting plate 43 and the fifth connecting plate 40. A round rod 30 is fixedly connected to the lower side of the second connecting rod 41. A frustum 23 is fixedly connected to the outside of each second threaded rod 21. The contact surfaces of the frustum 23 and the fifth connecting plate 40 are smooth;

[0046] First, in the initial state, the round rod 30 abuts against the welding area on the outside of the housing, and the fifth spring 39 is in a stretched state. During the up and down movement of the second threaded rod 21, the frustum 23 moves up and down following the second threaded rod 21. When the frustum 23 abuts against the fifth connecting plate 40, Figure 11From the perspective of [description], since the fixed frame 16 and the second slide plate 28 are connected for left-right sliding, when the frustum 23 abuts against the fifth connecting plate 40, it will cause the fifth connecting plate 40 to move to the right. The fifth connecting plate 40 drives the second slide plate 28 to move to the right, and the second slide plate 28 further stretches the fifth spring 39. At the same time, the fifth connecting plate 40 will also drive the round rod 30 to move to the right through the second connecting rod 41. The round rod 30 disconnects from the welding area on the outer side of the housing until the frustum 23 disconnects from the fifth connecting plate 40. At this time, under the action of the fifth spring 39, the second slide plate 28, the fifth connecting plate 40, the second connecting rod 41, and the round rod 30 as a whole move quickly to the left until the round rod 30 abuts against the welding area on the outer side of the housing, thereby forming an impact effect on the welding area on the outer side of the housing. Through the impact of the round rod 30, the solder with a general connection effect in the welding area on the outer side of the housing can be effectively cleaned. When using the second pressure sensor 38 for detection, especially in the initial period of time, the electrical signal emitted by the second pressure sensor 38 can be ignored. After a period of time, by analyzing the electrical signal emitted by the second pressure sensor 38, the accuracy of the detection result can be ensured.

[0047] An elimination component for eliminating thicker weld seams is installed on the outer side of the fifth connecting plate 40. The elimination component includes sandpaper fixedly sleeved on the outer side of the round rod 30. The side wall of the second slide plate 28 is fixedly connected with an electric push rod 44. The output end of the electric push rod 44 is fixedly connected with a push plate 45. The upper side of the sixth connecting plate 43 is slidably connected with a seventh connecting plate 47. The lower side of the seventh connecting plate 47 is fixedly connected with an eighth connecting plate 48. A seventh spring 49 is fixedly connected between the eighth connecting plate 48 and the sixth connecting plate 43. A collar is fixedly connected to the outer side of each frustum 23. A moving ring 27 is slidably connected to the outer sides of the collars together. A button 35 is fixedly connected to the side wall of the third connecting plate 34;

[0048] First, the button 35 is the same as the switch structure, function, and principle in real life, and the button 35 is electrically connected to the electric push rod 44 through a wire. When the two buttons 35 are in contact with each other, the electric push rod 44 is in the off state, and the push plate 45 does not contact the connecting plate seven 47. When the two buttons 35 are in the start state, the electric push rod 44 will drive the push plate 45 to move leftward. The push plate 45 contacts the connecting plate seven 47 and drives the connecting plate seven 47 to move leftward. The connecting plate seven 47 drives the connecting plate eight 48 to move leftward. The connecting plate eight 48 stretches the spring seven 49. The connecting plate eight 48 will move into the up-and-down movement area of the moving ring 27, that is, the moving ring 27 that moves up and down with the frustum 23 and the collar will contact the connecting plate seven 47. The connecting plate seven 47 moves up and down under the dual action of the moving ring 27 and the spring six 46. During the working process of the round rod 30, the round rod 30 is in an intermittent contact state with the welding area on the outer side of the housing. The up-and-down moving round rod 30 drives the sandpaper to move up and down. When the sandpaper contacts the welding area on the outer side of the housing, it will form a frictional effect on the welding area on the outer side of the housing, and thus can form a frictional cleaning effect on the protrusions in the welding area on the outer side of the housing.

[0049] A packaging method for a lithium battery production packaging device, comprising the following steps:

[0050] S1. Place the housing on the placement table 2 and put the battery cell into the housing;

[0051] S2. Seal the housing;

[0052] S3. Start the pressure sensor one 25 to make the pressure cylinder 9 contact the housing;

[0053] S4. Start resistance welding;

[0054] S5. After welding is completed, remove the packaged lithium battery.

[0055] In the present invention, when the encapsulation operation of the lithium battery is required, first place the outer shell on the conductive sheet on the upper side of the placement table 2. Since the thread directions on both sides of the first threaded rod 4 are opposite, and the threaded ring 5, the first connecting rod, and the arc-shaped clamping plate 3 are fixedly connected, rotating the first threaded rod 4 will cause the arc-shaped clamping plates 3 to move towards each other until they abut against the outer shell, thereby completing the clamping and fixing operation of the outer shell. Immediately afterwards, perform the placement operation in sequence. After the placement operation is completed, start the hydraulic rod 6. The hydraulic rod 6 drives the first connecting plate 7 and the pressure cylinder 9 to move downward. When the pressure cylinder 9 abuts against the outer shell, continue to start the pressure cylinder 9 until the pressure cylinder 9 can exert a certain pressure on the outer shell. Then, turn off the hydraulic rod 6. Since the hydraulic rod 6 has a self-locking function, even if the hydraulic rod 6 is turned off, the acting force of the pressure cylinder 9 on the outer shell will not change. Immediately afterwards, start the resistance welding. Take the electric welding pen and move the electric welding pen to the corresponding working position. Start the electric welding pen through the workbench 1 to form a closed circuit among the electric welding pen, the outer shell, and the conductive sheet, and start the welding operation. After the welding operation is completed, rotate the first threaded rod 4 again to disconnect the arc-shaped clamping plates 3 from the outer shell, and then take out the encapsulated lithium battery to finally complete the encapsulation work of the lithium battery. During the above processing process, the lighting lamp can be started to play a certain auxiliary effect on the processing process. The above are all prior arts and will not be elaborated further;

[0056] After the resistance welding operation is completed, the motor 10 is started. The motor 10 drives the rotating shaft 11 to rotate. The rotating shaft 11 drives the pressure cylinder 9 to rotate through the first gear 12 and the second gear 8. At the same time, the rotating shaft 11 also drives the placing table 2 to rotate through the pulley assembly 13. Under the dual action of the placing table 2 and the pressure cylinder 9, the lithium battery is driven to rotate. At the same time, since the fixed cover 14 is fixedly connected to the connecting plate 7 through the fourth connecting rod 50, the arc-shaped rack 17 fixedly connected to the fixed cover 14 is in a fixed state. At this time, the pressure cylinder 9 drives the ninth connecting plate 51 to rotate, and the ninth connecting plate drives the rotating cylinder 20 connected by rotation to rotate around the pressure cylinder 9. During this process, when the toothed ring 18 meshes with the arc-shaped rack 17, since the arc-shaped rack 17 is in a stationary state, the toothed ring 18 rotates. The toothed ring 18 drives the rotating cylinder 20 to rotate. Since the second threaded rod 21 is threadedly connected to the rotating cylinder 20 and the second threaded rod 21 is slidably connected to the ninth connecting plate 51, the rotating second threaded rod 21 will move upward or downward relative to the ninth connecting plate 51. Taking the downward movement of the second threaded rod 21 as an example, the second threaded rod 21 drives the second connecting plate 22 to move downward. The second connecting plate 22 stretches the first spring 19. At the same time, the second threaded rod 21 also drives the hammer head 15 to move downward through the second spring 26. When the hammer head 15 abuts against the housing, a certain force is exerted on the housing. At the same time, the first pressure sensor 25 emits a corresponding electrical signal. When the connection between the arc-shaped rack 17 and the toothed ring 18 is disconnected, the toothed ring 18 loses the acting force of the arc-shaped rack 17. At this time, under the action of the stretched first spring 19, the second threaded rod 21 moves upward as a whole. The second threaded rod 21 drives the hammer head 15 to move upward. The connection between the hammer head 15 and the housing is disconnected until the toothed ring 18 meshes with the arc-shaped rack 17 again. Eventually, the hammer head 15 can form a knocking effect on the housing;

[0057] During the above working process, when the first pressure sensor 25 emits an electrical signal, the magnitudes of the electrical signals emitted by all the first pressure sensors 25 can be compared. If the magnitudes of the electrical signals emitted by all the first pressure sensors 25 are the same or differ slightly, it indicates that the unevenness on the surface of the housing is small, and the deformation amount of the housing after resistance welding is small. Thus, a simple detection of the housing surface is completed. And in cooperation with the knocking of the hammer head 15, if the electrical signal emitted by the first pressure sensor 25 suddenly changes during the detection process, it indicates that the welding condition of the housing is average. Thus, various different detections of the housing are completed;

[0058] In the initial state, the detection rod 32 abuts against the side wall of the outer shell. After the resistance welding of the outer shell is completed, the detection rod 32 abuts against the welding area on the outer side of the outer shell. When the outer shell rotates, the detection rod 32 always abuts against the welding area, and the third spring 31 is in a stretched state, and the fourth spring 37 is in a compressed state. The second pressure sensor 38 emits an electrical signal. During this process, the magnitude of the electrical signal emitted by the second pressure sensor 38 can be observed. If the magnitude of the electrical signal emitted by the second pressure sensor 38 has been within a reasonable range, it indicates that the welding condition is good. If the magnitude of the electrical signal emitted by the second pressure sensor 38 fluctuates greatly, it indicates that the welding quality is poor and the solder distribution is unreasonable;

[0059] During the up and down movement of the second threaded rod 21, the frustum 23 moves up and down following the second threaded rod 21. When the frustum 23 abuts against the fifth connecting plate 40, from Figure 11 the perspective of, since the fixed frame 16 and the second sliding plate 28 are connected by left and right sliding, when the frustum 23 abuts against the fifth connecting plate 40, it will cause the fifth connecting plate 40 to move to the right. The fifth connecting plate 40 drives the second sliding plate 28 to move to the right, and the second sliding plate 28 further stretches the fifth spring 39. At the same time, the fifth connecting plate 40 also drives the round rod 30 to move to the right through the second connecting rod 41. The round rod 30 disconnects from the welding area on the outer side of the outer shell until the frustum 23 disconnects from the fifth connecting plate 40. At this time, under the action of the fifth spring 39, the second sliding plate 28, the fifth connecting plate 40, the second connecting rod 41, and the round rod 30 as a whole quickly move to the left until the round rod 30 abuts against the welding area on the outer side of the outer shell, thereby forming an impact effect on the welding area on the outer side of the outer shell. Through the impact of the round rod 30, the solder with a general connection effect in the welding area on the outer side of the outer shell can be effectively cleaned. When using the second pressure sensor 38 for detection, especially in the initial period of time, the electrical signal emitted by the second pressure sensor 38 can be ignored. After a period of time, the electrical signal emitted by the second pressure sensor 38 is analyzed, and thus the accuracy of the detection result can be ensured;

[0060] During the operation of the round rod 30, the welding area between the round rod 30 and the outer side of the housing is in an intermittent contact state. When the welding area on the outer side of the housing is uneven, the two connecting plates 34 will not be parallel, that is, the button 35 is in a disconnected state. The electric push rod 44 will drive the push plate 45 to move leftward. The push plate 45 abuts against the seventh connecting plate 47 and drives the seventh connecting plate 47 to move leftward. The seventh connecting plate 47 drives the eighth connecting plate 48 to move leftward. The eighth connecting plate 48 stretches the seventh spring 49. The eighth connecting plate 48 will move into the vertical movement area of the moving ring 27, that is, the moving ring 27 that moves up and down with the conical platform 23 and the collar will abut against the seventh connecting plate 47. The seventh connecting plate 47 moves up and down under the dual action of the moving ring 27 and the sixth spring 46. During the operation of the round rod 30, the welding area between the round rod 30 and the outer side of the housing is in an intermittent contact state. The round rod 30 moving up and down drives the sandpaper to move up and down. When the sandpaper abuts against the welding area on the outer side of the housing, it will form a friction effect on the welding area on the outer side of the housing, and thus can form a friction cleaning effect on the protrusions on the welding area on the outer side of the housing.

Claims

1. An encapsulation device for lithium battery production, including a workbench (1), characterized in that, The workbench (1) is rotatably installed with a placement table (2). A hydraulic rod (6) is fixedly installed inside the workbench (1). The output end of the hydraulic rod (6) is fixedly connected to a first connecting plate (7). The first connecting plate (7) is rotatably connected to a pressure cylinder (9). A first detection component for detecting the firmness after lithium battery packaging is installed on the upper side of the workbench (1). The first detection component includes a ninth connecting plate (51) fixedly installed on the outer side of the pressure cylinder (9). A plurality of rotating cylinders (20) are rotatably connected inside the ninth connecting plate (51). A second threaded rod (21) is threadedly connected inside each rotating cylinder (20). The second threaded rod (21) slidably penetrates through the ninth connecting plate (51). A hammer head (15) is slidably connected to the lower side of the second threaded rod (21). A second spring (26) is fixedly connected between the hammer head (15) and the second threaded rod (21). A first pressure sensor (25) is also fixedly connected between the hammer head (15) and the second threaded rod (21). A control component for controlling the reciprocating movement of the hammer head (15) is installed on the lower side of the first connecting plate (7). The control component includes a motor (10) rotatably installed inside the workbench (1). The output end of the motor (10) is fixedly installed with a rotating shaft (11). A second gear (8) is fixedly connected to the outer side of the pressure cylinder (9). A first gear (12) is rotatably connected to the lower side of the first connecting plate (7). The rotating shaft (11) penetrates through the first connecting plate (7) and is slidably connected to the first gear (12). The first gear (12) meshes with the second gear (8). A fixed cover (14) is rotatably connected to the lower side of the second gear (8). The fixed cover (14) is fixedly connected to the first connecting plate (7) through a fourth connecting rod (50). A plurality of arc-shaped racks (17) are fixedly connected inside the fixed cover (14). A tooth ring (18) is fixedly connected to the outer side of each rotating cylinder (20). The number of tooth rings (18) is opposite to that of the arc-shaped racks (17). The upper side of the second threaded rod (21) is rotatably connected to a second connecting plate (22). A first spring (19) is fixedly connected to the upper side of the second connecting plate (22). One end of the first spring (19) far away from the second connecting plate (22) is fixedly connected to a connecting rod. The connecting rod is slidably connected to the fixed cover (14).

2. The encapsulation device for lithium battery production according to claim 1, characterized in that, A second detection component for detecting the package weld is installed on the outer side of the fixed cover (14), and the second detection component includes a fixed frame (16) fixedly installed on the side wall of the fixed cover (14), two slide plates (29) are slidably connected in the fixed frame (16), a spring (31) is fixedly connected between the two slide plates (29) and the fixed frame (16), a square rod (33) is slidably connected to the side walls of the two slide plates (29), one end of the square rod (33) is fixedly connected to a connecting plate (36), a spring (37) is fixedly connected between the connecting plate (36) and the slide plate (29), a detection rod (32) is fixedly connected to the outer side of the connecting plate (36), a connecting plate (34) is fixedly connected to the other side of the square rod (33), and a pressure sensor (38) is fixedly connected between the connecting plate (34) and the slide plate (29).

3. An encapsulation device for lithium battery production according to claim 2, characterized in that, An impact assembly is installed in the fixed frame (16), and the impact assembly includes a slide plate 2 (28) slidably installed in the fixed frame (16), a spring 5 (39) fixedly connected between the slide plate 2 (28) and the fixed frame (16), a connecting plate 5 (40) fixedly connected to the lower side of the slide plate 2 (28), a connecting rod 2 (41) slidably connected to the lower side of the connecting plate 5 (40), a connecting rod 3 (42) fixedly connected to the upper side of the connecting rod 2 (41), a connecting plate 6 (43) fixedly connected to the upper side of the connecting rod 3 (42), a spring 6 (46) fixedly connected between the connecting plate 6 (43) and the connecting plate 5 (40), a round rod (30) fixedly connected to the lower side of the connecting rod 2 (41), and a round table (23) fixedly connected to the outer side of each of the threaded rods 2 (21).

4. An encapsulation device for lithium battery production according to claim 3, characterized in that, The outer side of the connecting plate five (40) is equipped with an elimination component for eliminating thicker welds, and the elimination component includes sandpaper fixedly sleeved on the outer side of the round rod (30). The side wall of the slide plate two (28) is fixedly connected to an electric push rod (44), and the output end of the electric push rod (44) is fixedly connected to a push plate (45). The upper side of the connecting plate six (43) is slidably connected to the connecting plate seven (47), and the lower side of the connecting plate seven (47) is fixedly connected to the connecting plate eight (48). A spring seven (49) is fixedly connected between the connecting plate eight (48) and the connecting plate six (43). The outer side of each of the frustums (23) is fixedly connected to a ring, and the outer sides of the rings are slidably connected to a movable ring (27). The side wall of the connecting plate three (34) is fixedly connected to a button (35).

5. The encapsulation device for lithium battery production according to claim 4, characterized in that, The rotating shaft (11) is connected to the placement table (2) through a pulley assembly (13).

6. The encapsulation device for lithium battery production according to claim 5, wherein, A conductive sheet is fixedly connected to the upper side of the placement table (2), and two placement frames are fixedly installed on the front side of the workbench (1), with welding pens placed in both placement frames.

7. An encapsulation device for lithium battery production according to claim 6, characterized in that, A clamping assembly is installed on the upper side of the workbench (1). The clamping assembly includes a first threaded rod (4) rotatably installed in the workbench (1). Two threaded rings (5) are threadedly connected to the outer side of the first threaded rod (4). A first connecting rod is fixedly connected to the upper sides of the two threaded rings (5). The first connecting rod is slidably connected to the workbench (1). An arc-shaped clamping plate (3) is fixedly connected to the upper side of the first connecting rod.

8. A packaging method for the packaging equipment used in the production of lithium batteries according to claim 7, characterized in that, It includes the following steps: S1. Place the outer shell on the placement table (2) and put the battery cell into the outer shell. S2. Seal the outer shell. S3. Start the first pressure sensor (25) to make the pressure cylinder (9) abut against the outer shell. S4. Start resistance welding. S5. After welding is completed, remove the encapsulated lithium battery.

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