Lithium battery liquid injection machine and liquid injection device

Abstract

The invention relates to a lithium battery liquid injection machine and a liquid injection device, and belongs to the technical field of lithium battery liquid injection, the lithium battery liquid injection machine comprises a liquid injection machine body, the liquid injection machine body comprises a sliding frame, the outer wall of the liquid injection machine body is in sliding connection with the sliding frame, the outer wall of the sliding frame is in lifting connection with a lifting plate, and the outer wall of the lifting plate is in sliding connection with a sliding block; the top of the sliding block is fixedly connected with a liquid storage box, and the outer wall of the liquid storage box is fixedly connected with a first electric push rod. After liquid injection of a lithium battery is completed, in order to prevent the situation that the surface cleanliness of the liquid injection machine is reduced due to liquid leakage at the end of the liquid injection spray pipe, when a connecting plate ascends to drive the liquid injection spray pipe to ascend for recycling, a connecting rod is driven to slide along the inner wall of a first limiting groove, and through rotation of a swing rod, the surface cleanliness of the liquid injection machine is improved. And meanwhile, the sliding rod is driven to synchronously slide along the inner walls of the second limiting groove and the sliding groove, and meanwhile, the protection block is driven to stretch out, so that the inclined protection block moves to the position below the spraying pipe, and the effect of effectively stopping the spraying pipe from receiving materials is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery liquid injection, and in particular, to a lithium battery liquid injection machine and a liquid injection device. Background Art

[0002] When a lithium-ion battery is working normally, the negative electrode terminal led out by the negative electrode current collector and the positive electrode terminal led out by the positive electrode current collector form an electronic path with the external circuit, and lithium ions in the electrolyte and the positive and negative electrode active substances form an ionic path. The electronic path and the ionic path together form a loop to achieve the purpose of normal operation. When processing a lithium battery, a liquid injection device is required to assemble the lithium battery.

[0003] In the prior art, a lithium battery liquid injection machine and a liquid injection device with a publication number of CN118645779B, a liquid injection device, includes a housing, a nozzle, and a conveyor belt. The housing is fixedly arranged, and a first cavity with variable volume is provided inside the housing. The nozzle is rotatably arranged on the housing around a preset axis, and the nozzle is communicated with the first cavity. The conveyor belt is located below the nozzle, and a plurality of lithium battery housings are arranged on the conveyor belt along its moving direction. The nozzle has a second state. In the second state, the nozzle faces the rear side of the moving direction of the lithium battery housing on the conveyor belt, and the nozzle is located above the preset axis. The electrolyte sprayed by the nozzle presents a parabolic shape. When the electrolyte passes through the highest point of the parabola, the electrolyte changes from a continuous water column shape to an intermittent water droplet shape, reducing the amount of electrolyte leakage caused by replacing the lithium battery housing while the nozzle does not stop working, and improving the liquid injection efficiency.

[0004] However, when the above-mentioned lithium battery liquid injection machine is in use, although the leakage amount of the nozzle can be effectively controlled, after the nozzle is used, the synchronous protection effect for spraying storage and shielding is not high, resulting in the situation that the surface of the nozzle will have dripping, reducing the surface cleanliness of the liquid injection machine. Moreover, when injecting liquid for spraying, the alignment accuracy between the part to be injected with liquid of the lithium battery and the nozzle is not high, reducing the alignment accuracy between the nozzle and the liquid injection interface of the lithium battery, which does not meet the usage requirements of people. Therefore, we propose a lithium battery liquid injection machine and a liquid injection device. Summary of the Invention

[0005] To solve the problems mentioned in the above background, the present invention provides a lithium battery liquid injection machine and a liquid injection device to solve the problems of low synchronous protection effect for spraying storage and shielding and low linkage positioning effect for the docking part between the nozzle and the lithium battery mentioned in the above background technology.

[0006] To achieve the above technical objectives, the technical solutions adopted by the present invention are as follows: A lithium battery liquid injection device, including a liquid injection body, the liquid injection body includes a sliding frame, the outer wall of the liquid injection body is slidably connected with a sliding frame, the outer wall of the sliding frame is connected with a lifting plate in a lifting manner, the outer wall of the lifting plate is slidably connected with a sliding block, the top of the sliding block is fixedly connected with a liquid storage box, the outer wall of the liquid storage box is fixedly connected with a first electric push rod, one end of the first electric push rod is fixedly connected with a connecting plate, the outer wall of the liquid storage box is fixedly connected with a connecting hose, and one end of the connecting hose is fixedly connected with a liquid injection nozzle fixedly connected to the bottom of the connecting plate; The liquid injection body further includes: A protection mechanism, arranged at the bottom of the liquid injection nozzle, for preventing the liquid injection nozzle from dripping electrolyte; A positioning mechanism, arranged on one side of the protection mechanism, for improving the accuracy of the liquid injection position when the liquid injection nozzle descends; A variable pitch mechanism, arranged on the outer wall of the sliding frame; A fixing mechanism, arranged on the outer wall of the liquid injection body; The protection mechanism includes a protection block, the bottom of the connecting plate is fixedly connected with a connecting rod, the outer wall of the connecting rod is slidably connected with a swing rod rotatably connected to the outer wall of the sliding block, the outer wall of the swing rod is slidably connected with a sliding rod slidably connected to the bottom of the sliding block, and the end of the sliding rod is detachably connected with a protection block located on one side of the liquid injection nozzle.

[0007] Preferably, a first limiting groove is opened at the connecting part of the outer wall of the swing rod and the connecting rod, a second limiting groove is opened at the connecting part of the outer wall of the swing rod and the sliding rod, a sliding groove is opened at the connecting part of the bottom of the sliding block and the sliding rod, two groups of connecting rods and swing rods are provided, and the position distributions of the two groups of connecting rods and swing rods are symmetrical about the central axis of the connecting plate. The position distributions of the first limiting groove and the second limiting groove are equidistantly distributed about the rotation center of the swing rod. The protection block is arranged in an inclined shape, and the protection block and the sliding rod are detachably connected by bolts.

[0008] Preferably, the sliding rod forms a sliding structure with the swing rod and the second limiting groove and the sliding groove, and the swing rod forms a rotating structure with the connecting rod and the first limiting groove and the sliding block.

[0009] Preferably, the positioning mechanism includes a positioning block, the side wall of the connecting plate is fixedly connected with an adapter rod, the outer wall of the sliding rod is fixedly connected with an adapter plate, the outer wall of the adapter plate is rotatably connected with a rotating rod, one end of the rotating rod is rotatably connected with a positioning block, the outer wall of the positioning block is fixedly connected with a telescopic rod, and the end of the telescopic rod is fixedly connected with an adapter block slidably connected to the outer wall of the adapter rod. A reciprocating groove is opened at the connecting part of the outer wall of the adapter rod and the adapter block.

[0010] Preferably, a rotating structure is formed between the rotating rod and the positioning block through the connecting plate. There are two groups of rotating rods, and the positions of the two groups of rotating rods are symmetric about the central axis of the connecting plate. A telescopic structure is formed between the positioning block and the telescopic rod through the rotating rod. The outer wall contour of the positioning block is arc-shaped. There are two groups of positioning blocks, and the positions of the two groups of positioning blocks are symmetric about the central axis of the liquid injection nozzle. The connecting block is embedded and slides on the inner wall of the reciprocating groove.

[0011] Preferably, the variable pitch mechanism includes a variable pitch slider. A first servo motor is fixedly connected to the top of the sliding frame. The output end of the first servo motor is fixedly connected to a first threaded rod rotatably connected to the outer wall of the sliding frame. A lifting groove is formed at the connecting part of the inner side wall of the sliding frame and the lifting plate. The end of the sliding block is fixedly connected to a variable pitch slider slidably connected to the outer wall of the sliding frame. A connecting groove is formed at the connecting part of the outer wall of the lifting plate and the sliding block. The outer wall of the variable pitch slider is slidably connected to a limiting rod fixedly connected to the outer wall of the sliding frame. A lithium battery main body is placed on the outer wall of the liquid injection body below the liquid injection nozzle. A second servo motor is fixedly connected to the outer wall of the liquid injection body. The output end of the second servo motor is fixedly connected to a second threaded rod threadedly connected to the outer wall of the sliding frame.

[0012] Preferably, the fixing mechanism includes a clamping plate. A second electric push rod is fixedly connected to the bottom of the liquid injection body. One end of the second electric push rod is fixedly connected to a lifting box slidably connected to the bottom of the liquid injection body. A telescopic groove is formed at the connecting part of the bottom of the liquid injection body and the lifting box. A third servo motor is fixedly connected to the outer wall of the lifting box. The output end of the third servo motor is fixedly connected to a third threaded rod rotatably connected to the inner wall of the lifting box. The outer wall of the third threaded rod is threadedly connected to a clamping plate slidably connected to the outer wall of the liquid injection body. A centering groove is formed at the connecting part of the outer wall of the lifting box and the clamping plate. A slot is formed at the connecting part of the outer wall of the liquid injection body and the clamping plate.

[0013] Preferably, a lifting structure is formed between the lifting box and the telescopic groove through the second electric push rod. The lifting boxes are arranged in a linear arrangement. A sliding structure is formed between the clamping plate and the centering groove through the third threaded rod. There are two groups of third threaded rods, and the rotation directions of the two groups of third threaded rods are opposite. The inner wall contour of the slot is larger than the outer wall contour of the clamping plate, and the clamping plate and the third threaded rod are arranged in a one-to-one correspondence.

[0014] A lithium battery liquid injection machine includes the above-mentioned lithium battery liquid injection device, and also includes a machine body, the machine body is fixedly arranged on the ground, and a shell is fixedly installed on the machine body.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. After the lithium battery is filled with liquid, in order to prevent liquid leakage at the end of the liquid injection nozzle from reducing the surface cleanliness of the liquid injection machine, when the connecting plate rises and drives the liquid injection nozzle to rise and retract, the connecting rod is driven to slide along the inner wall of the first limiting groove, and through the rotation of the swing rod, the sliding rod is driven to slide synchronously along the inner walls of the second limiting groove and the sliding groove. At the same time, the protective block is driven to perform an extending movement, so that the inclined protective block moves below the nozzle, achieving the effect of effectively blocking the receiving of materials by the nozzle.

[0016] 2. When the liquid injection nozzle of the present invention injects liquid into the lithium battery, in order to improve the docking accuracy of the nozzle with the lithium battery interface when descending, when the connecting plate descends, the connecting block is driven to slide along the inner wall of the reciprocating groove, so that the connecting block remains in place. At the same time, the rotation of the swing rod drives the connecting plate fixedly connected to the sliding rod to perform a synchronous telescopic movement. The movement of the connecting plate drives the positioning block fixedly connected to the telescopic rod to perform a centering slide, improving the docking accuracy of the liquid injection nozzle with the lithium battery interface when descending, and improving the quality and efficiency of lithium battery processing.

[0017] 3. When the present invention performs liquid injection processing on lithium batteries at different positions, in order to improve the synchronous pitch-changing effect of the liquid injection nozzle, the first servo motor is turned on, and through the rotation of the first threaded rod, the lifting plate is driven to slide along the inner wall of the lifting groove. The sliding of the lifting plate, through the limiting action of the connecting groove, drives the pitch-changing slider fixedly connected to the sliding block to perform a pitch-changing slide along the outer wall of the limiting rod, so that the distance between the liquid injection nozzles is synchronously adjusted, playing a role in improving the flexible liquid injection movement of the liquid injection machine for lithium batteries of different sizes.

[0018] 4. When it is necessary to perform liquid injection processing on lithium batteries of different sizes, in order to improve the stability of placing lithium batteries of different sizes on the liquid injection machine, the second electric push rod is turned on, driving the lifting box to slide along the inner wall of the telescopic groove, and the third servo motor is turned on. Through the rotation of the third threaded rod, the clamping plate is driven to slide along the inner wall of the centering groove, and under the centering movement of the clamping plate, the stability of processing lithium batteries of different sizes during the liquid injection process is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic side view structure diagram of the present invention; Figure 3 is a schematic rear view structure diagram of the present invention; Figure 4 is a schematic bottom view structure diagram of the present invention; Figure 5 is a schematic diagram of the internal structure of the lifting box of the present invention; Figure 6 is a schematic diagram of the connection structure between the pitch-changing slider and the limiting rod of the present invention; Figure 7 Schematic diagram of the connection structure between the connecting rod and the swing rod of the present invention; Figure 8 Schematic diagram of the connection structure between the swing rod and the sliding rod of the present invention; Figure 9 Schematic diagram of the connection structure between the connecting plate and the sliding rod of the present invention; Figure 10 Schematic diagram of the position distribution structure of the clamping blocks of the present invention; Figure 11 For the present invention Figure 8 Enlarged structure diagram at position A in

[0020] The reference numerals in the drawings are: Liquid injection body; 2. Sliding frame; 3. Lifting plate; 4. Sliding block; 5. Liquid storage box; 6. First electric push rod; 7. Connecting plate; 8. Connecting hose; 9. Liquid injection nozzle; 10. Protection mechanism; 1001. Connecting rod; 1002. Swing rod; 1003. First limiting groove; 1004. Sliding rod; 1005. Second limiting groove; 1006. Chute; 1007. Protection block; 11. Positioning mechanism; 1101. Connecting rod; 1102. Connecting plate; 1103. Rotating rod; 1104. Positioning block; 1105. Expansion rod; 1106. Connecting block; 1107. Reciprocating groove; 12. Variable distance mechanism; 1201. First servo motor; 1202. First threaded rod; 1203. Lifting groove; 1204. Variable distance slider; 1205. Connecting groove; 1206. Limiting rod; 13. Lithium battery main body; 14. Second servo motor; 15. Second threaded rod; 16. Fixing mechanism; 1601. Second electric push rod; 1602. Lifting box; 1603. Telescopic groove; 1604. Third servo motor; 1605. Third threaded rod; 1606. Clamping plate; 1607. Centering groove; 1608. Slot. Detailed implementation manners

[0021] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention as follows. Embodiment

[0022] Please refer to Figures 1 to 11, this embodiment provides a lithium battery liquid injection machine and a liquid injection device, including a liquid injection machine body 1. The liquid injection machine body 1 includes a sliding frame 2. The outer wall of the liquid injection machine body 1 is slidably connected with the sliding frame 2. The outer wall of the sliding frame 2 is connected with a lifting plate 3 in a lifting manner. The outer wall of the lifting plate 3 is slidably connected with a sliding block 4. The top of the sliding block 4 is fixedly connected with a liquid storage box 5. The outer wall of the liquid storage box 5 is fixedly connected with a first electric push rod 6. One end of the first electric push rod 6 is fixedly connected with a connecting plate 7. The outer wall of the liquid storage box 5 is fixedly connected with a connecting hose 8. One end of the connecting hose 8 is fixedly connected with a liquid injection nozzle 9 fixedly connected to the bottom of the connecting plate 7. Embodiment

[0023] Based on Embodiment 1, a protection mechanism 10 is further disclosed.

[0024] As Figures 7 - 11 shown, the liquid injection machine body 1 further includes: A protection mechanism 10, arranged at the bottom of the liquid injection nozzle 9, for preventing the liquid injection nozzle 9 from dripping electrolyte; A positioning mechanism 11, arranged on one side of the protection mechanism 10, for improving the accuracy of the descending liquid injection position of the liquid injection nozzle 9; A variable pitch mechanism 12, arranged on the outer wall of the sliding frame 2; The protection mechanism 10 includes a protection block 1007. The bottom of the connecting plate 7 is fixedly connected with a connecting rod 1001. The outer wall of the connecting rod 1001 is slidably connected with a swing rod 1002 rotatably connected to the outer wall of the sliding block 4. The outer wall of the swing rod 1002 is slidably connected with a sliding rod 1004 slidably connected to the bottom of the sliding block 4. The end of the sliding rod 1004 is detachably connected with a protection block 1007 located on one side of the liquid injection nozzle 9.

[0025] As Figure 11 shown, a first limiting groove 1003 is provided at the connecting part of the outer wall of the swing rod 1002 and the connecting rod 1001. A second limiting groove 1005 is provided at the connecting part of the outer wall of the swing rod 1002 and the sliding rod 1004. A sliding groove 1006 is provided at the connecting part of the bottom of the sliding block 4 and the sliding rod 1004. Both the connecting rod 1001 and the swing rod 1002 are provided with two groups. The position distributions of the two groups of connecting rods 1001 and swing rods 1002 are symmetrical about the central axis of the connecting plate 7. The position distributions of the first limiting groove 1003 and the second limiting groove 1005 are equidistant from the rotation center of the swing rod 1002, which is beneficial to improving the sliding stability of the sliding rod 1004 by arranging two groups of connecting rods 1001 and swing rods 1002 with position distributions symmetrical about the central axis of the connecting plate 7.

[0026] As Figure 9As shown, a sliding structure is formed between the sliding rod 1004, the swing rod 1002, the second limiting groove 1005 and the sliding groove 1006. A rotating structure is formed between the swing rod 1002, the connecting rod 1001, the first limiting groove 1003 and the sliding block 4, which is conducive to the sliding of the connecting rod 1001 along the inner wall of the first limiting groove 1003, driving the swing rod 1002 to rotate along the outer wall of the sliding block 4, playing a role in driving the sliding rod 1004 to slide conveniently. It is beneficial to the rotation of the swing rod 1002, driving the sliding rod 1004 to slide synchronously along the inner walls of the second limiting groove 1005 and the sliding groove 1006, achieving the effect of driving the protective block 1007 to expand and contract and slide synchronously.

[0027] As Figure 10 shown, the protective block 1007 is arranged in an inclined shape, and the protective block 1007 and the sliding rod 1004 are detachably connected by bolts. The inclined arrangement of the protective block 1007 enables the inclined protective block 1007 to move below the injection nozzle, achieving the effect of effectively blocking the received material for the injection nozzle.

[0028] As Figures 10 to 11 shown, the positioning mechanism 11 includes a positioning block 1104. A connecting rod 1101 is fixedly connected to the side wall of the connecting plate 7. A connecting plate 1102 is fixedly connected to the outer wall of the sliding rod 1004. A rotating rod 1103 is rotatably connected to the outer wall of the connecting plate 1102. One end of the rotating rod 1103 is rotatably connected to the positioning block 1104. A telescopic rod 1105 is fixedly connected to the outer wall of the positioning block 1104. The end of the telescopic rod 1105 is fixedly connected to a connecting block 1106 that is slidably connected to the outer wall of the connecting rod 1101. A reciprocating groove 1107 is formed at the connecting part between the outer wall of the connecting rod 1101 and the connecting block 1106. By setting the positioning block 1104, when the injection nozzle 9 injects liquid into the lithium battery, in order to improve the docking accuracy between the injection nozzle and the lithium battery interface when the injection nozzle descends, when the connecting plate 7 descends, it will drive the connecting block 1106 to slide along the inner wall of the reciprocating groove 1107, making the connecting block 1106 keep its position unchanged. At the same time, the rotation of the swing rod 1002 drives the connecting plate 1102 fixedly connected to the sliding rod 1004 to expand and contract synchronously. The movement of the connecting plate 1102 drives the positioning block 1104 fixedly connected to the telescopic rod 1105 to perform centering sliding, improving the docking accuracy between the injection nozzle 9 and the lithium battery interface when the injection nozzle descends, and improving the quality and efficiency of lithium battery processing.

[0029] As Figures 9 to 11As shown in the figure, a rotating structure is formed between the rotating rod 1103, the connecting plate 1102 and the positioning block 1104. There are two groups of rotating rods 1103, and the position distributions of the two groups of rotating rods 1103 are symmetrical about the central axis of the connecting plate 1102. A telescopic structure is formed between the positioning block 1104, the rotating rod 1103 and the telescopic rod 1105. The outer wall contour of the positioning block 1104 is arc-shaped. There are two groups of positioning blocks 1104, and the position distributions of the two groups of positioning blocks 1104 are symmetrical about the central axis of the liquid injection nozzle 9. The connecting block 1106 is embedded and slides on the inner wall of the reciprocating groove 1107, which is beneficial to the movement of the connecting plate 1102 to drive the rotating rod 1103 to rotate conveniently through the connection of the positioning block 1104, and plays a role in driving the two groups of positioning blocks 1104 to slide relatively.

[0030] As Figures 3 to 6 shown in the figure, the variable pitch mechanism 12 includes a variable pitch slider 1204. A first servo motor 1201 is fixedly connected to the top of the sliding frame 2. The output end of the first servo motor 1201 is fixedly connected to a first threaded rod 1202 that is rotatably connected to the outer wall of the sliding frame 2. A lifting groove 1203 is opened at the connection part between the inner side wall of the sliding frame 2 and the lifting plate 3. The end of the sliding block 4 is fixedly connected to a variable pitch slider 1204 that is slidably connected to the outer wall of the sliding frame 2. A connection groove 1205 is opened at the connection part between the outer wall of the lifting plate 3 and the sliding block 4. The outer wall of the variable pitch slider 1204 is slidably connected to a limiting rod 1206 that is fixedly connected to the outer wall of the sliding frame 2. A lithium battery main body 13 is placed on the outer wall of the liquid injection machine body 1 below the liquid injection nozzle 9. A second servo motor 14 is fixedly connected to the outer wall of the liquid injection machine body 1. The output end of the second servo motor 14 is fixedly connected to a second threaded rod 15 that is threadedly connected to the outer wall of the sliding frame 2. By setting the variable pitch slider 1204, when injecting liquid into lithium batteries at different positions, in order to improve the synchronous variable pitch effect of the liquid injection nozzle 9, the first servo motor 1201 is turned on. Through the rotation of the first threaded rod 1202, the lifting plate 3 is driven to slide along the inner wall of the lifting groove 1203. The sliding of the lifting plate 3 drives the variable pitch slider 1204 fixedly connected to the sliding block 4 to slide variably along the outer wall of the limiting rod 1206 through the limiting action of the connection groove 1205, so that the distance between the liquid injection nozzles 9 is adjusted synchronously, playing a role in improving the flexible liquid injection movement of the liquid injection machine for lithium batteries of different sizes.

[0031] As Figure 6As shown in the figure, a lifting structure is formed between the lifting plate 3 and the lifting groove 1203 through the first threaded rod 1202. A variable pitch structure is formed between the variable pitch slider 1204 and the limiting rod 1206 through the lifting plate 3 and the connecting groove 1205. The variable pitch slider 1204 is integrally connected to the sliding block 4, which is beneficial to the rotation of the first threaded rod 1202, driving the lifting plate 3 to slide along the inner wall of the lifting groove 1203, playing a role in driving the variable pitch sliding of the sliding block 4. It is beneficial to the sliding of the lifting plate 3 to drive the variable pitch slider 1204 to slide along the inner wall of the limiting rod 1206 through the limiting effect of the connecting groove 1205, playing a role in improving the flexible liquid injection movement of the liquid injection machine for lithium batteries of different sizes.

[0032] As Figures 4 to 5 shown, The fixing mechanism 16 is arranged on the outer wall of the liquid injection machine body 1; The fixing mechanism 16 includes a clamping plate 1606. A second electric push rod 1601 is fixedly connected to the bottom of the liquid injection machine body 1. One end of the second electric push rod 1601 is fixedly connected to a lifting box 1602 that is slidably connected to the bottom of the liquid injection machine body 1. A telescopic groove 1603 is opened at the connection part between the bottom of the liquid injection machine body 1 and the lifting box 1602. A third servo motor 1604 is fixedly connected to the outer wall of the lifting box 1602. The output end of the third servo motor 1604 is fixedly connected to a third threaded rod 1605 that is rotatably connected to the inner wall of the lifting box 1602. The outer wall of the third threaded rod 1605 is threadedly connected to a clamping plate 1606 that is slidably connected to the outer wall of the liquid injection machine body 1. An alignment groove 1607 is opened at the connection part between the outer wall of the lifting box 1602 and the clamping plate 1606. A slot 1608 is opened at the connection part between the outer wall of the liquid injection machine body 1 and the clamping plate 1606. By setting the clamping plate 1606, when it is necessary to perform liquid injection processing on lithium batteries of different sizes, in order to improve the stability of placing lithium batteries of different sizes on the liquid injection machine, the second electric push rod 1601 is opened to drive the lifting box 1602 to slide along the inner wall of the telescopic groove 1603, and the third servo motor 1604 is opened to drive the clamping plate 1606 to slide along the inner wall of the alignment groove 1607 through the rotation of the third threaded rod 1605. Under the centering movement of the clamping plate 1606, the stability of processing different-sized lithium batteries during liquid injection is improved.

[0033] As Figure 4 shown, a lifting structure is formed between the lifting box 1602 and the telescopic groove 1603 through the second electric push rod 1601. The lifting boxes 1602 are arranged in a linear arrangement, which is beneficial to the drive of the second electric push rod 1601 to drive the lifting box 1602 to slide along the inner wall of the telescopic groove 1603, playing a role in conveniently adjusting the use state of the clamping plate 1606.

[0034] As Figure 5As shown in the figure, the clamping plate 1606 forms a sliding structure with the centering groove 1607 through the third threaded rod 1605. There are two groups of the third threaded rods 1605, and the rotation directions of the two groups of the third threaded rods 1605 are opposite. The inner wall contour of the slot 1608 is larger than the outer wall contour of the clamping plate 1606, and the clamping plate 1606 and the third threaded rod 1605 are arranged in a one-to-one correspondence, which is beneficial to the rotation of the third threaded rod 1605, driving the clamping plate 1606 to slide along the inner wall of the centering groove 1607, and improving the stability of the processing of lithium batteries with different sizes during the liquid injection process.

[0035] A lithium battery liquid injection machine includes a lithium battery liquid injection device in the above-mentioned embodiment, and further includes a machine body which is fixedly arranged on the ground, and a housing is fixedly installed on the machine body.

[0036] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the technical content disclosed above within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A lithium battery injection device, comprising an injection body (1), characterized in that: The liquid injection body (1) comprises a sliding frame (2), the outer wall of the liquid injection body (1) is slidably connected to the sliding frame (2), the outer wall of the sliding frame (2) is lifted and lowered connected to a lifting plate (3), the outer wall of the lifting plate (3) is slidably connected to a sliding block (4), the top of the sliding block (4) is fixedly connected to a liquid storage box (5), the outer wall of the liquid storage box (5) is fixedly connected to a first electric push rod (6), one end of the first electric push rod (6) is fixedly connected to a connecting plate (7), the outer wall of the liquid storage box (5) is fixedly connected to a connecting hose (8), and one end of the connecting hose (8) is fixedly connected to a liquid injection nozzle (9) fixedly connected to the bottom of the connecting plate (7); The liquid injection body (1) further comprises: A protection mechanism (10) is arranged at the bottom of the liquid injection nozzle (9) and is used to prevent the liquid injection nozzle (9) from leaking electrolyte; A positioning mechanism (11) is arranged on one side of the protection mechanism (10) and is used to improve the accuracy of the lowering injection position of the injection nozzle (9); A pitch-changing mechanism (12) is arranged on the outer wall of the sliding frame (2); A fixing mechanism (16) is arranged on the outer wall of the liquid injection body (1); The protection mechanism (10) comprises a protection block (1007), a connection rod (1001) fixedly connected to the bottom of the connection plate (7), a swing rod (1002) rotatably connected to the outer wall of the sliding block (4) on the outer wall of the connection rod (1001), a sliding rod (1004) slidably connected to the bottom of the sliding block (4) on the outer wall of the swing rod (1002), and a protection block (1007) located on one side of the liquid injection nozzle (9) detachably connected to the end of the sliding rod (1004).

2. A lithium battery injection device according to claim 1, characterized in that: A first limiting groove (1003) is provided at a connection position between the outer wall of the swing rod (1002) and the connecting rod (1001), a second limiting groove (1005) is provided at a connection position between the outer wall of the swing rod (1002) and the sliding rod (1004), a sliding groove (1006) is provided at a connection position between the bottom of the sliding block (4) and the sliding rod (1004), two groups of connecting rods (1001) and swing rods (1002) are provided, the positions of the two groups of connecting rods (1001) and swing rods (1002) are symmetrical about the central axis of the connecting plate (7), the positions of the first limiting groove (1003) and the second limiting groove (1005) are equidistant about the rotation center of the swing rod (1002), the protective block (1007) is arranged in an inclined shape, and the protective block (1007) and the sliding rod (1004) are detachably connected by bolts.

3. A lithium battery injection device according to claim 2, characterized in that: The sliding rod (1004) forms a sliding structure through the swing rod (1002) and the second limiting groove (1005) and the sliding groove (1006), and the swing rod (1002) forms a rotating structure through the connecting rod (1001) and the first limiting groove (1003) and the sliding block (4).

4. A lithium battery injection device according to claim 1, characterized in that: The positioning mechanism (11) comprises a positioning block (1104); a connecting rod (1101) is fixedly connected to the side wall of the connecting plate (7); the outer wall of the sliding rod (1004) is fixedly connected to the connecting plate (1102); the outer wall of the connecting plate (1102) is rotatably connected to the rotating rod (1103); one end of the rotating rod (1103) is rotatably connected to the positioning block (1104); the outer wall of the positioning block (1104) is fixedly connected to the telescopic rod (1105); the end of the telescopic rod (1105) is fixedly connected to the connecting block (1106) slidably connected to the outer wall of the connecting rod (1101); and a reciprocating groove (1107) is provided at the connection portion between the outer wall of the connecting rod (1101) and the connecting block (1106).

5. A lithium battery liquid injection device according to claim 4, characterized in that: The rotating rod (1103) forms a rotating structure between the connecting plate (1102) and the positioning block (1104); two groups of rotating rods (1103) are provided; the positions of the two groups of rotating rods (1103) are symmetrical about the central axis of the connecting plate (1102); the positioning block (1104) forms a telescopic structure between the rotating rod (1103) and the telescopic rod (1105); the outer wall profile of the positioning block (1104) is in an arc shape; two groups of positioning blocks (1104) are provided; the positions of the two groups of positioning blocks (1104) are symmetrical about the central axis of the liquid injection nozzle (9); and the connecting block (1106) is embedded in the inner wall of the reciprocating groove (1107) to slide.

6. A lithium battery liquid injection device according to claim 1, characterized in that: The pitch-changing mechanism (12) comprises a pitch-changing slider (1204); a first servo motor (1201) is fixedly connected to the top of the sliding frame (2); an output end of the first servo motor (1201) is fixedly connected to a first threaded rod (1202) rotatably connected to the outer wall of the sliding frame (2); a lifting groove (1203) is provided at a connection portion between the inner wall of the sliding frame (2) and the lifting plate (3); an end of the sliding block (4) is fixedly connected to the pitch-changing slider (1204) slidably connected to the outer wall of the sliding frame (2); and the lifting plate ( A connection groove (1205) is provided at a connection portion between the outer wall of the variable pitch slider (1204) and the sliding block (4); the outer wall of the variable pitch slider (1204) is slidably connected to a limit rod (1206) fixedly connected to the outer wall of the sliding frame (2); a lithium battery body (13) located below the liquid injection nozzle (9) is placed on the outer wall of the liquid injection body (1); a second servo motor (14) is fixedly connected to the outer wall of the liquid injection body (1); and an output end of the second servo motor (14) is fixedly connected to a second threaded rod (15) threadedly connected to the outer wall of the sliding frame (2).

7. A lithium battery liquid injection device according to claim 6, characterized in that: The lifting plate (3) forms a lifting structure through the first threaded rod (1202) and the lifting slot (1203); the variable pitch slider (1204) forms a variable pitch structure through the lifting plate (3) and the connecting slot (1205) and the limiting rod (1206); and the variable pitch slider (1204) and the sliding block (4) are integrally connected.

8. A lithium battery injection device according to claim 1, characterized in that: The fixing mechanism (16) comprises a clamping plate (1606); a second electric push rod (1601) is fixedly connected to the bottom of the liquid injection body (1); one end of the second electric push rod (1601) is fixedly connected to a lifting box (1602) which is slidably connected to the bottom of the liquid injection body (1); a telescopic groove (1603) is provided at the connection portion between the bottom of the liquid injection body (1) and the lifting box (1602); a third servo motor (1604) is fixedly connected to the outer wall of the lifting box (1602); and the third servo motor (1604) is fixedly connected to the outer wall of the lifting box (1602). The output end of the motor (1604) is fixedly connected to a third threaded rod (1605) rotatably connected to the inner wall of the lifting box (1602); the outer wall of the third threaded rod (1605) is threadedly connected to a clamping plate (1606) slidably connected to the outer wall of the liquid injection body (1); a centering groove (1607) is provided at the connection point between the outer wall of the lifting box (1602) and the clamping plate (1606); and a slot (1608) is provided at the connection point between the outer wall of the liquid injection body (1) and the clamping plate (1606).

9. A lithium battery liquid injection device according to claim 8, characterized in that: The lifting box (1602) forms a lifting structure through the second electric push rod (1601) and the telescopic slot (1603), the lifting boxes (1602) are arranged in a straight line, the clamping plate (1606) forms a sliding structure through the third threaded rod (1605) and the centering slot (1607), the third threaded rod (1605) is provided with two groups, the two groups of third threaded rods (1605) rotate in opposite directions, the inner wall profile of the slot (1608) is larger than the outer wall profile of the clamping plate (1606), and the clamping plate (1606) and the third threaded rod (1605) are arranged in a one-to-one correspondence.

10. A lithium battery filling machine, characterized in that , including a lithium battery liquid injection device as described in any one of claims 1 to 9, and also including a body, the body is fixedly arranged on the ground, and the shell is fixedly installed on the body.

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