Lithium battery liquid injection device and vacuum glove box thereof

Abstract

The utility model provides a lithium battery liquid injection device and a vacuum glove box thereof, which comprise a liquid injection device body, the lower side of the liquid injection device body is fixedly connected with a liquid injection pipe, one side of the liquid injection device body is fixedly connected with a fixed box, the inner side of the fixed box is fixedly connected with a fixed plate, and the upper side of the fixed box is provided with a limiting mechanism. And a transposition mechanism is arranged on the inner side of the fixed box. The lithium battery limiting device has the advantages that the production efficiency is improved by shortening the time for limiting a lithium battery without liquid injection, the two limiting blocks are close to each other by rotating the bidirectional screw rod, and the lithium battery is limited after the two limiting blocks are close to a certain distance, and when liquid injection of one lithium battery is completed, the lithium battery can be fixed through rotation of the position changing plate, and the lithium battery can be fixed through rotation of the position changing plate. The position of the lithium battery which is not filled with liquid and the position of the lithium battery which is filled with the liquid are exchanged, and then when the lithium battery which is not filled with the liquid is filled with the liquid, the lithium battery which is filled with the liquid is taken down, so that the liquid filling efficiency of the lithium battery is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery liquid injection, and particularly relates to a lithium battery liquid injection device and a vacuum glove box thereof. Background Art

[0002] Lithium battery liquid injection refers to the operation of injecting electrolyte into the lithium battery during the manufacturing process of the lithium battery. Liquid injection is one of the key steps in lithium battery manufacturing, which ensures that the positive and negative electrode materials inside the lithium battery are in full contact with the electrolyte, thereby realizing the normal charge and discharge reaction of the lithium battery.

[0003] A liquid injection device for lithium battery production disclosed in the authorized announcement number CN218569175U includes a liquid injection device main body and a positioning device. The liquid injection device main body is provided with a liquid injection cavity, and the upper top wall of the liquid injection cavity is provided with a plurality of liquid injection tubes; the positioning device is installed in the liquid injection cavity and is arranged corresponding to the liquid injection tubes. The positioning device includes a bottom plate, and a plurality of positioning grooves are provided on the bottom plate. The number of positioning grooves is equal to the number of liquid injection tubes. A connecting part is threadedly connected in the positioning groove. The connecting part is hollow inside. A positioning column is fixedly connected to the connecting part. An inner disc is arranged in the positioning column. A cavity and a plurality of negative pressure holes are arranged in the inner disc. The cavity is communicated with the outside through the negative pressure holes. Through the setting of corresponding mechanisms, the utility model is used for positioning the un-injected lithium battery, reducing the calibration times of the staff for positioning the un-injected lithium battery, not only can reduce the workload of the staff, but also can improve the liquid injection efficiency of the lithium battery, thereby ensuring the overall production process of the lithium battery.

[0004] Through the use of a negative pressure pump, the above technical solution realizes the limiting and positioning of the un-injected lithium battery, reducing the deviation of the un-injected lithium battery. However, when injecting liquid into the lithium battery, the above technical solution needs to limit the un-injected lithium battery, and remove it after the liquid injection is completed, and then limit and inject liquid into the new un-injected lithium battery again. This makes the staff have a low efficiency when injecting liquid into the lithium battery, and a large amount of time will be consumed when reciprocally limiting and releasing the limit of the lithium battery, thereby reducing the production efficiency. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a lithium battery liquid injection device, which has the advantage of increasing the production efficiency by reducing the time for limiting the un-injected lithium battery, and solves the problems raised in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A lithium battery liquid injection device, comprising a liquid injection device body. A liquid injection pipe is fixedly connected to the lower side of the liquid injection device body. A fixed box is fixedly connected to one side of the liquid injection device body. A fixing plate is fixedly connected to the inner side of the fixed box. A position-changing mechanism is arranged inside the fixed box. The position-changing mechanism includes a servo motor fixedly connected to the inner side of the fixed box. The servo motor is arranged below the fixing plate. The output shaft of the servo motor penetrates through the fixing plate. A first rotating rod and a second rotating rod are rotatably connected to the upper side of the fixing plate. Position-changing plates are fixedly connected to the upper sides of the first rotating rod and the second rotating rod.

[0008] As a preferred solution of this embodiment, the upper ends of the first rotating rod and the second rotating rod both penetrate through the fixed box, and the outer sides of the first rotating rod and the second rotating rod are rotatably connected to the liquid injection device body.

[0009] As a preferred solution of this embodiment, the output shaft of the servo motor is fixedly connected to the lower end of the first rotating rod through a coupling. Gears are fixedly connected to the outer sides of the first rotating rod and the second rotating rod, and an internal tooth rack is in transmission connection with the outer sides of the two gears.

[0010] As a preferred solution of this embodiment, a limiting mechanism is arranged on the upper side of the fixed box. There are multiple limiting mechanisms, and the multiple limiting mechanisms are respectively and evenly arranged on the upper sides of the two position-changing plates.

[0011] As a preferred solution of this embodiment, the limiting mechanism includes fixing blocks fixedly connected to the upper side of the position-changing plate. There are two fixing blocks. A bidirectional screw rod is rotatably connected between the two fixing blocks, and one end of the bidirectional screw rod penetrates through one of the fixing blocks. A first moving block and a second moving block are threadedly connected to the outer side of the bidirectional screw rod.

[0012] As a preferred solution of this embodiment, both the first moving block and the second moving block are slidably connected to the upper side of the position-changing plate, and limiting blocks are arranged on one side of both the first moving block and the second moving block.

[0013] As a preferred solution of this embodiment, clamping grooves are formed on one side of both the first moving block and the second moving block. Clamping blocks are fixedly connected to the outer sides of the two limiting blocks, and the clamping blocks are movably clamped inside the clamping grooves.

[0014] As a preferred solution of this embodiment, a limiting groove is formed on the upper side of the position-changing plate. Sliding blocks are fixedly connected to the lower sides of both the second moving block and the first moving block, and both sliding blocks are slidably connected inside the limiting groove.

[0015] As a preferred solution of this embodiment, a reinforcing ring block is fixedly connected to the inner side of the fixed box. There are two reinforcing ring blocks, and the two reinforcing ring blocks are respectively arranged on the outer sides of the first rotating rod and the second rotating rod. The first rotating rod and the second rotating rod are both rotatably connected to the two reinforcing ring blocks.

[0016] As a preferred solution of this embodiment, rubber layers are fixedly connected to the inner sides of the two limiting blocks. A reinforcing block is fixedly connected to the inner side of the fixed box, and the upper side of the reinforcing block is fixedly connected to the fixing plate.

[0017] An embodiment of the present invention also provides a vacuum glove box, which includes a glove box body and a transition chamber. The transition chamber is fixedly connected to one side of the glove box body, and also includes the lithium battery filling device described above. The lithium battery filling device is arranged inside the glove box body.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention has the advantage of increasing production efficiency by reducing the time for limiting the non-filled lithium batteries. During actual use, by rotating the bidirectional screw, the two limiting blocks approach each other, and when they approach a certain distance, the lithium batteries are limited. When one of the lithium batteries is filled, the position of the non-filled lithium battery and the filled lithium battery can be interchanged by rotating the transposition plate. After that, when filling the non-filled lithium battery, the filled lithium battery is removed, and a new lithium battery is installed for storage, thereby reducing the time required for limiting the lithium batteries and greatly improving the filling efficiency of the lithium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the lithium battery filling device of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the transposition plate in the embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the first cross-sectional structure of the fixed box in the embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the second cross-sectional structure of the fixed box in the embodiment of the present invention;

[0024] Figure 5 For the present invention Figure 4 The enlarged schematic diagram of part A;

[0025] Figure 6 It is a schematic diagram of the structure of the gear and the internal gear rack in the embodiment of the present invention;

[0026] Figure 7 This is a schematic cross-sectional structure diagram of the clamping block in the embodiment of the present utility model.

[0027] As shown in the figure: 1. Main body of the liquid injection device; 2. Liquid injection pipe; 3. Fixed box; 4. Transposition mechanism; 41. Servo motor; 42. First rotating rod; 43. Second rotating rod; 44. Gear; 45. Internal tooth rack; 46. Transposition plate; 5. Limiting mechanism; 51. Fixed block; 52. Bidirectional screw; 53. First moving block; 54. Second moving block; 55. Limiting block; 6. Fixed plate; 7. Reinforcing ring block; 81. Limiting groove; 82. Slide block; 9. Reinforcing block; 10. Rubber layer; 111. Card slot; 112. Clamping block. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0029] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0030] Example 1 :

[0031] Please refer to Figures 1 to 7As shown in the figure, an embodiment of the present utility model provides a lithium battery liquid injection device, which specifically includes a liquid injection device body 1. A liquid injection pipe 2 is fixedly connected to the lower side of the liquid injection device body 1, and a fixed box 3 is fixedly connected to one side of the liquid injection device body 1. A fixing plate 6 is fixedly connected to the inner side of the fixed box 3. The liquid injection device body 1 can connect the liquid injection pipe 2 and the fixed box 3, and the liquid injection pipe 2 can cooperate with the liquid injection device body 1 to achieve the liquid injection effect of the lithium battery liquid. At the same time, the liquid injection device body 1 is a prior art in this field, so it will not be elaborated here. The fixed box 3 can install the fixing plate 6, and the fixing plate 6 can divide the inner side of the fixed box 3 into upper and lower chambers. A limiting mechanism 5 is arranged on the upper side of the fixed box 3, and a position-changing mechanism 4 is arranged inside the fixed box 3. The limiting mechanism 5 can effectively limit the un-injected lithium battery, thereby increasing the stability of the lithium battery during liquid injection. The position-changing mechanism 4 can effectively drive the un-injected lithium battery and the injected lithium battery to exchange positions, so that when the staff injects the lithium battery, they can limit the additional un-injected lithium battery, thereby reducing the time consumed for limiting the un-injected lithium battery.

[0032] Please refer to Figures 1 to 6As shown in the figure, the position-changing mechanism 4 specifically includes a servo motor 41 fixedly connected to the inner side of the fixed box 3. The servo motor 41 is arranged on the lower side of the fixed plate 6. The output shaft of the servo motor 41 penetrates through the fixed plate 6. A first rotating rod 42 and a second rotating rod 43 are rotatably connected to the upper side of the fixed plate 6. The fixed box 3 can install and fix the servo motor 41. At the same time, the fixed box 3 can connect the first rotating rod 42 and the second rotating rod 43 through the fixed plate 6, and enable the first rotating rod 42 and the second rotating rod 43 to rotate smoothly on the upper side of the fixed plate 6. The upper ends of the first rotating rod 42 and the second rotating rod 43 both penetrate through the fixed box 3, and the outer sides of the first rotating rod 42 and the second rotating rod 43 are both rotatably connected to the injection device body 1. The output shaft of the servo motor 41 is fixedly connected to the lower end of the first rotating rod 42 through a coupling. When the servo motor 41 operates, it can drive the first rotating rod 42 to rotate through its connection with the first rotating rod 42. In addition, gears 44 are fixedly connected to the outer sides of the first rotating rod 42 and the second rotating rod 43. An internal gear rack 45 is connected to the outer sides of the two gears 44 in a transmission manner. Position-changing plates 46 are fixedly connected to the upper sides of the first rotating rod 42 and the second rotating rod 43. The internal gear rack 45 can smoothly drive the two gears 44 to rotate. Thus, when the gear 44 connected to the outer side of the first rotating rod 42 rotates following the first rotating rod 42, the gear 44 on the outer side of the first rotating rod 42 can drive the second rotating rod 43 and the gear 44 on the outer side of the second rotating rod 43 to rotate together through the transmission of the internal gear rack 45. When the first rotating rod 42 and the second rotating rod 43 rotate, they can drive the two position-changing plates 46 to rotate together. The upper sides of the position-changing plates 46 can be used to place the lithium batteries being injected and the lithium batteries not yet injected. Thus, through the rotation of the position-changing plates 46, the positions of the two lithium batteries are interchanged, thereby improving the efficiency of the lithium batteries during injection.

[0033] Please refer to Figures 1 to 7 As shown in the figure, a limiting mechanism 5 is arranged on the upper side of the fixed box 3. In this embodiment, multiple (specifically four) limiting mechanisms 5 are arranged. The multiple limiting mechanisms 5 are respectively and evenly arranged on the upper sides of the two position-changing plates 46, and the structures of the multiple limiting mechanisms 5 are the same. Therefore, the principles of the multiple limiting mechanisms 5 are the same, and no further elaboration will be made here.

[0034] The limiting mechanism 5 specifically includes fixing blocks 51 fixedly connected to the upper side of the transposition plate 46, and there are two fixing blocks 51. A bidirectional screw 52 is rotatably connected between the two fixing blocks 51, and one end of the bidirectional screw 52 penetrates through one of the fixing blocks 51. The transposition plate 46 can connect the bidirectional screw 52 through the fixing blocks 51, so that the bidirectional screw 52 can rotate smoothly. One end of the bidirectional screw 52 penetrates through one of the fixing blocks 51, making it convenient and handy for the staff to rotate the bidirectional screw 52 when needed. The outer side of the bidirectional screw 52 is threadedly connected with a first moving block 53 and a second moving block 54. Both the first moving block 53 and the second moving block 54 are slidably connected to the upper side of the transposition plate 46. A limiting block 55 is provided on one side of each of the first moving block 53 and the second moving block 54, and the two limiting blocks 55 are of the same size. The bidirectional screw 52 can connect the first moving block 53 and the second moving block 54, and the fixing blocks 51 can limit the first moving block 53 and the second moving block 54. At the same time, the threads on both sides of the bidirectional screw 52 are opposite, which enables the bidirectional screw 52 to drive the first moving block 53 and the second moving block 54 to rotate towards each other smoothly when rotating. When the first moving block 53 and the second moving block 54 move, they will also drive the two limiting blocks 55 to move closer to each other. When the two limiting blocks 55 move a certain distance, the unliquid-injected lithium battery can be limited, reducing the possibility of the lithium battery shaking and shifting during liquid injection. At the same time, the two limiting blocks 55 are of the same size, enabling the two limiting blocks 55 to limit the lithium battery smoothly and not easily causing the situation that the lithium battery cannot be stably limited due to different sizes.

[0035] Please refer to Figure 7 As shown, a clamping groove 111 is formed on one side of each of the first moving block 53 and the second moving block 54. A clamping block 112 is fixedly connected to the outer side of each of the two limiting blocks 55. The clamping block 112 is movably clamped inside the clamping groove 111. The first moving block 53 and the second moving block 54 can play a role in installing and connecting the limiting block 55 through the connection relationship between the clamping block 112 and the clamping groove 111. The setting of the clamping groove 111 and the clamping block 112 enables the staff to replace the limiting block 55 appropriately according to the specifications of the lithium battery, thereby increasing the range of lithium batteries that the limiting block 55 can adapt to.

[0036] Please refer to Figure 5As shown, a limiting groove 81 is formed on the upper side of the transposition plate 46. Sliders 82 are fixedly connected to the lower sides of the second moving block 54 and the first moving block 53 respectively. Both sliders 82 are slidably connected to the inside of the limiting groove 81. The transposition plate 46 can limit the two sliders 82 through the limiting groove 81. Since the two limiting grooves 81 are respectively connected to the first moving block 53 and the second moving block 54, when the second moving block 54 and the first moving block 53 move, they will also be limited by the limiting groove 81, thereby further improving the stability of the second moving block 54 and the first moving block 53 during movement.

[0037] Please refer to Figure 3 As shown, a reinforcing ring block 7 is fixedly connected to the inside of the fixed box 3, and there are two reinforcing ring blocks 7. The two reinforcing ring blocks 7 are respectively arranged on the outer sides of the first rotating rod 42 and the second rotating rod 43, and the first rotating rod 42 and the second rotating rod 43 are rotatably connected to the two reinforcing ring blocks 7 respectively. The fixed box 3 can install and fix the two reinforcing ring blocks 7, and the two reinforcing ring blocks 7 can respectively limit the first rotating rod 42 and the second rotating rod 43, thereby increasing the stability of the first rotating rod 42 and the second rotating rod 43 during rotation.

[0038] Please refer to Figure 3 and Figure 4 As shown, rubber layers 10 are fixedly connected to the inner sides of the two limiting blocks 55. A reinforcing block 9 is fixedly connected to the inside of the fixed box 3, and the upper side of the reinforcing block 9 is fixedly connected to the fixing plate 6. There are multiple reinforcing blocks 9. The setting of the rubber layers 10 can increase the friction between the limiting blocks 55 and the lithium battery, making the limiting blocks 55 more stable when limiting and clamping the lithium battery, thereby further improving the stability of the lithium battery during liquid injection. At the same time, the setting of the reinforcing blocks 9 can reinforce the fixing plate 6, making the fixing plate 6 not prone to tilting and shaking during use.

[0039] The specific working process of this embodiment is as follows: When the present utility model is in use, the manipulator can place two un-injected lithium batteries on the upper side of the transposition plate 46, and after placement, rotate the bidirectional screw 52. When the bidirectional screw 52 rotates, it will drive the two limit blocks 55 to move towards each other through the first moving block 53 and the second moving block 54. When the two limit blocks 55 move a certain distance, the clamping of the lithium batteries can be achieved. Then, the staff can inject liquid into one of the lithium batteries through the liquid injection pipe 2. After one of the lithium batteries is injected with liquid, the staff can start the servo motor 41. Through the operation of the servo motor 41, drive the first rotating rod 42 and the gear 44 outside the first rotating rod 42 to rotate, and through the transmission of the internal tooth rack 45, drive the second rotating rod 43 and the two transposition plates 46 to rotate together. When the transposition plate 46 rotates, it will successfully swap the positions of the lithium battery after liquid injection and the un-injected lithium battery. At this time, the staff can continue to inject liquid into the other lithium battery, and at the same time remove the lithium battery after liquid injection. After removal, install a new un-injected lithium battery, and then perform the operation of repeatedly rotating and transposing, so as to effectively reduce the time consumed in limiting the lithium battery and greatly improve the efficiency of the lithium battery during liquid injection.

[0040] Example 2 :

[0041] On the basis of Embodiment 1, this embodiment further provides a vacuum glove box, which includes a glove box body and a transition chamber. The transition chamber is fixedly connected to one side of the glove box body, and also includes the lithium battery liquid injection device in Embodiment 1. The lithium battery liquid injection device is arranged inside the glove box body. Because lithium metal has high oxidizability to water vapor and oxygen, by placing the lithium battery liquid injection device in the vacuum glove box, the vacuum glove box completely isolates the environment inside and outside the box. Before injecting liquid into the lithium battery, first evacuate the entire glove box to completely remove the air inside the box and reduce the water and oxygen content to below 0.1 ppm, and then fill it with inert gas before performing the liquid injection work.

[0042] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A lithium battery injection device, comprising an injection device body (1), characterized in that: The lower side of the liquid injection device body (1) is fixedly connected to a liquid injection pipe (2); one side of the liquid injection device body (1) is fixedly connected to a fixed box (3); the inner side of the fixed box (3) is fixedly connected to a fixed plate (6); the inner side of the fixed box (3) is provided with a shifting mechanism (4); the shifting mechanism (4) comprises a servo motor (41) fixedly connected to the inner side of the fixed box (3); the servo motor (41) is provided on the lower side of the fixed plate (6); the output shaft of the servo motor (41) passes through the fixed plate (6); the upper side of the fixed plate (6) is rotatably connected to a first rotating rod (42) and a second rotating rod (43); the upper sides of the first rotating rod (42) and the second rotating rod (43) are both fixedly connected to a shifting plate (46).

2. The lithium battery injection device according to claim 1, characterized in that: The upper ends of the first rotating rod (42) and the second rotating rod (43) both pass through the fixed box (3), and the outer sides of the first rotating rod (42) and the second rotating rod (43) are both rotatably connected to the liquid injection device body (1).

3. The lithium battery injection device according to claim 1, characterized in that: The output shaft of the servo motor (41) is fixedly connected to the lower end of the first rotating rod (42) through a coupling, and the outer sides of the first rotating rod (42) and the second rotating rod (43) are fixedly connected with gears (44), and the outer sides of the two gears (44) are transmission-connected with internal gear racks (45).

4. The lithium battery injection device according to claim 1, characterized in that: A limiting mechanism (5) is arranged on the upper side of the fixed box (3), and a plurality of the limiting mechanisms (5) are arranged. The plurality of limiting mechanisms (5) are evenly arranged on the upper sides of the two transposition plates (46).

5. The lithium battery injection device according to claim 4, characterized in that: The limiting mechanism (5) comprises a fixed block (51) fixedly connected to the upper side of the shifting plate (46), two fixed blocks (51) are provided, a bidirectional screw rod (52) is rotatably connected between the two fixed blocks (51), one end of the bidirectional screw rod (52) passes through one of the fixed blocks (51), and the outer side of the bidirectional screw rod (52) is threadedly connected to a first moving block (53) and a second moving block (54).

6. The lithium battery liquid injection device according to claim 5, characterized in that: The first moving block (53) and the second moving block (54) are both slidably connected to the upper side of the transposition plate (46), and a limiting block (55) is provided on one side of the first moving block (53) and the second moving block (54).

7. The lithium battery injection device according to claim 6, characterized in that: A clamping slot (111) is provided on one side of the first moving block (53) and the second moving block (54); a clamping block (112) is fixedly connected to the outer sides of the two limit blocks (55); and the clamping block (112) is movably clamped on the inner side of the clamping slot (111).

8. The lithium battery injection device according to claim 5, characterized in that: A limiting groove (81) is provided on the upper side of the shifting plate (46), and a sliding block (82) is fixedly connected to the lower side of the second moving block (54) and the first moving block (53), and the two sliding blocks (82) are slidably connected to the inner side of the limiting groove (81).

9. The lithium battery injection device according to claim 1, characterized in that: A reinforcement ring block (7) is fixedly connected to the inner side of the fixed box (3), and two reinforcement ring blocks (7) are provided. The two reinforcement ring blocks (7) are respectively arranged on the outer sides of the first rotating rod (42) and the second rotating rod (43).

10. The lithium battery injection device according to claim 6, characterized in that: The inner sides of the two limit blocks (55) are fixedly connected with a rubber layer (10), the inner side of the fixed box (3) is fixedly connected with a reinforcement block (9), and the upper side of the reinforcement block (9) is fixedly connected to the fixed plate (6).

11. A vacuum glove box, comprising a glove box body and a transition chamber, wherein the transition chamber is fixedly connected to one side of the glove box body, characterized in that: It also includes the lithium battery injection device according to any one of claims 1 to 9, wherein the lithium battery injection device is arranged in the glove box body.

Images