Automatic liquid injection device and method for soft package lithium battery

Abstract

The invention relates to the technical field of battery processing, and particularly discloses an automatic liquid injection device and method for a soft package lithium battery, and the automatic liquid injection device comprises a placement seat movably arranged at the top of a machine table, limiting mechanisms arranged in the placement seat at intervals, and a drainage mechanism arranged at the top of the placement seat and used for guiding electrolyte to flow, by means of the fixing assembly and the supporting assembly of the limiting mechanism, the bottom of the soft-package lithium battery can be conveniently supported while the soft-package lithium battery is conveniently clamped from the two sides, the limiting stability of the soft-package lithium battery is improved, subsequent liquid injection use is facilitated, and the use safety of the soft-package lithium battery is improved. And the position of the limiting mechanism is conveniently adjusted through the driving assembly so as to be suitable for the soft package lithium batteries with different sizes, the electrolyte dripping from the liquid injection head is drained and collected through the drainage mechanism, the electrolyte is prevented from falling on the limiting mechanism, the liquid injection environment is conveniently maintained, and meanwhile, the waste of the electrolyte is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery processing, and in particular to an automatic liquid injection device and method for soft-pack lithium batteries. Background Art

[0002] Soft-pack lithium battery is a lithium-ion battery encapsulated with an aluminum-plastic composite film. It has the advantages of light weight, low mold cost, and high safety. The structure of the soft-pack lithium battery includes a positive electrode, a negative electrode, an electrolyte, and a separator. It has high puncture resistance and thermal insurance. When the soft-pack lithium battery is produced or recycled, it is necessary to inject electrolyte into the soft-pack lithium battery to ensure normal use of the battery.

[0003] An automatic liquid filling device for soft-pack lithium batteries with publication number CN117748065B has the following problem raised in its background technology: when injecting electrolyte into the interior of a lithium battery shell, since there is a certain distance between the liquid filling head and the lower inner wall of the lithium battery shell, when the electrolyte falls to the lower inner wall of the battery shell, the electrolyte will collide with the lower inner wall of the lithium battery shell, which may cause part of the electrolyte to splash to the outside of the lithium battery and part of it to splash to the position of the sealing plate above the lithium battery shell, affecting the subsequent sealing of the sealing plate.

[0004] Based on the existing technology, there are the following problems:

[0005] In the prior art, soft-pack lithium batteries usually use aluminum-plastic composite films as their outer shells. This material is relatively soft and can provide a certain degree of deformation without breaking, thus having a thermal insurance effect. The existing soft-pack lithium battery injection device usually only fixes the soft-pack lithium battery that needs to be injected by clamping, and then injects the soft-pack lithium battery through the injection mechanism. However, as the electrolyte is continuously injected, the weight of the soft-pack lithium battery increases, so it is necessary to ensure the clamping force to ensure the stability of the soft-pack lithium battery, thereby avoiding affecting the injection use. However, in order to cause the soft-pack lithium battery to deform, thereby affecting the amount of stored and discharged electrolyte, the prior art is not convenient for clamping the soft-pack lithium battery. At the same time, the bottom of the soft-pack lithium battery is supported. Although the existing soft-pack lithium battery injection device can support the bottom of the soft-pack lithium battery, it is not convenient for soft-pack lithium batteries of different sizes to be used. After the injection is completed, the injection mechanism usually drips electrolyte onto the fixing mechanism. Long-term injection use affects the injection environment. Referring to the above application documents, although it reduces the splashing of electrolyte by adjusting the height between the injection head and the soft-pack lithium battery, it is not suitable for soft-pack lithium batteries of different sizes, and it is not convenient to drain the electrolyte dripping from the injection head. There are certain shortcomings. In order to solve the above problems, an automatic injection device and method for soft-pack lithium batteries are proposed. Summary of the invention

[0006] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides an automatic liquid injection device and method for soft-pack lithium batteries, which are convenient for supporting the bottom of the soft-pack lithium battery while clamping the soft-pack lithium battery, and are convenient for using soft-pack lithium batteries of different sizes. After the liquid injection is completed, the electrolyte dripping from the liquid injection mechanism is drained to prevent it from falling on the fixing mechanism, so as to avoid affecting the long-term liquid injection use.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic liquid injection device for soft-pack lithium batteries, comprising a machine platform and a frame fixedly arranged on the top of the machine platform, and also comprising a placement seat movably arranged on the top of the machine platform, a limiting mechanism arranged in intervals in the placement seat and used to fix the soft-pack lithium battery, and a drainage mechanism arranged on the top of the placement seat for guiding the flow of electrolyte, wherein the top of the frame is provided with a liquid injection mechanism extending to the inside of the frame, and the limiting mechanism comprises:

[0008] The movable seat is movably arranged in the placement seat and is symmetrically arranged. The sides of the movable seats close to each other are all designed in an arc shape to limit the soft-pack lithium battery from both sides of the soft-pack lithium battery. The sides of the movable seats close to each other are provided with a fixing component for fixing the soft-pack lithium battery, and the fixing component includes:

[0009] The limiting plate is movably arranged on the inner side of the moving seat, and the first electromagnet and the second electromagnet are fixedly arranged on the side where the limiting plate and the moving seat are close to each other, respectively. The first electromagnet, the second electromagnet and the limiting plate are all designed in an arc shape. The bottom of the moving seat is provided with a supporting assembly which is linked with the limiting plate and is used to support the bottom of the soft-pack lithium battery. The supporting assembly includes:

[0010] The support plate is movably arranged at the bottom of the movable seat. When the support plate approaches the soft-pack lithium battery along with the limiting plate, the side of the support plate close to each other is located on the inner side of the limiting plate.

[0011] Further, the support assembly comprises:

[0012] The first support seat is fixedly arranged at the bottom of the movable seat, the outer side of the first support seat is sleeved with a first support rod extending to the inner side of the first support seat, one end of the first support rod located on the inner side of the first support seat is fixedly connected to the outer side of the support plate, and the support plate is designed in an arc shape;

[0013] The second support seat is fixedly arranged at the bottom of the limiting plate, and the lower end of the side wall of the second support seat is sleeved on the side wall of the first support rod;

[0014] A first limiting ring is fixedly sleeved on the side wall of the first support rod and is located outside the first support seat, so that the first limiting ring cooperates with the first support seat stopper, thereby limiting the first support rod from being separated from the first support seat;

[0015] The second limiting ring is arranged between the first support seat and the second support seat, and the inner wall of the second limiting ring is fixedly sleeved on the side wall of the first support rod, so that the limiting plate drives the second limiting ring and the first support rod to move through the second support seat, thereby driving the support plate to move. The side wall of the first support rod and the first spring is sleeved between the second support seat and the support plate, so that there is space for the second support seat to move between the second support seat and the support plate, and the support plate has a tendency to move toward the inside of the limiting plate.

[0016] Furthermore, the support assembly further comprises:

[0017] The second support rod is sleeved on the outer side of the first support seat and extends to the inner side of the first support seat. The side wall of one end of the second support rod located on the outer side of the first support seat is sleeved with a support frame, and the support frame is fixedly connected to the outer side of the first support seat. The side wall of one end of the second support rod located on the inner side of the support frame is fixedly sleeved with a third limiting ring, and the side wall of the second support rod is sleeved with a second spring between the support frame and the third limiting ring;

[0018] The third support rod is fixedly arranged on one side of the second support seat close to the first support seat, and the side wall of the third support rod is sleeved in the second support rod. The third support rod is provided with a groove for sleeved the second support rod.

[0019] Furthermore, the support assembly further comprises:

[0020] The tooth grooves are arranged horizontally and are opened at the bottom of the second support rod;

[0021] A first gear is disposed between the first support rod and the second support rod and meshes with the tooth groove. A second gear is meshed on a side of the first gear close to the support plate, and the first gear drives the second gear to perform an accelerated motion. The first gear and the second gear are both rotatably connected to the inner side of the first support seat through a mounting frame;

[0022] The shift rod is fixed at the bottom of the second gear. The top of the first support rod is provided with a shift slot. The bottom inner wall of the shift slot is fixed with a shift block. The bottom of the shift rod extends into the shift slot and is located on the side of the shift block close to the support plate.

[0023] Furthermore, the fixing assembly further comprises:

[0024] The connecting plate is fixedly arranged on both sides of the outer side of the limiting plate, and the inner side of the connecting plate is vertically aligned with the inner side of the limiting plate. The outer side of the connecting plate is fixedly provided with a guide rod, and the side wall of the end of the guide rod away from the connecting plate is fixedly provided with a fourth limiting ring;

[0025] The guide groove is arranged on both sides of the inner side of the movable seat. The guide rod and the fourth limiting ring are both sleeved in the guide groove, and the fourth limiting ring cooperates with the guide groove stopper to limit the guide rod from being separated from the guide groove.

[0026] Furthermore, the top of the placement seat is provided with placement slots arranged at intervals, and the movable seats are all located in the placement slots;

[0027] A workbench is fixedly provided on the top of the machine, the front end of the top of the workbench is designed to be concave, and a conveyor is provided at the concave part of the workbench, an electric slide rail symmetrically arranged with the center point of the workbench is fixedly provided on the top of the workbench, an extension plate is fixedly provided on the back of the placement seat, and the sliding end of the electric slide rail is fixedly connected to the bottom of the extension plate so that the placement seat can move to the top of the conveyor, a mounting seat is fixedly provided on the side wall of the placement seat, and a driving assembly for driving the moving seats to move closer to or away from each other is provided on the top of the mounting seat, and the driving assembly includes:

[0028] The servo motor is fixedly arranged on the top of the mounting seat, the inner side wall of the placement slot is provided with a slide slot, a slider is placed inside the slide slot, and the sides of the sliders close to each other are respectively fixedly connected to the two sides of the moving seat;

[0029] A threaded rod is rotatably arranged on the side wall of the placement seat and extends into the slide groove. A side wall at one end of the threaded rod located in the slide groove is provided with a bidirectional threaded groove arranged at intervals and is threadedly connected to the slider to drive the symmetrically arranged moving seats to move closer to or away from each other. The two threaded rods in the same placement slot are connected by a first transmission mechanism, and one of the threaded rods in the spaced placement slots is connected by a second transmission mechanism, and the output shaft of the servo motor is connected by one of the threaded rods.

[0030] Furthermore, the drainage mechanism includes:

[0031] The base is fixed on the top of the mounting base, and a first electric push rod is fixedly provided inside the base, and a telescopic shaft of the first electric push rod extends to the top of the base, and a lifting plate is fixedly provided on the telescopic shaft of the first electric push rod, and a flow guide seat arranged at intervals and extending to the top of the placement seat is fixedly provided on the top of the lifting plate, a flow guide groove is opened on the top of the flow guide seat, and the depth of the flow guide groove gradually increases from the side close to the lifting plate to the side away from the lifting plate, a flow guide pipe connected to the flow guide groove is fixedly provided on the side of the flow guide seat away from the lifting plate, and a flow guide component arranged at intervals is provided on the top of the flow guide seat.

[0032] Further, the flow guide assembly includes:

[0033] A first connecting block is fixedly arranged on the inner wall of the guide groove, a connecting rod is fixedly arranged on the inner side of the first connecting block, a connecting ring is sleeved on the side wall of the connecting rod, a guide plate is fixedly arranged on the lower end of the connecting ring away from the first connecting block, and the guide plate is designed in a semi-ring shape, a second connecting block is fixedly arranged on the end of the connecting rod away from the first connecting block, so that the second connecting block cooperates with the connecting ring stopper, thereby limiting the connection ring from being separated from the connecting rod, and a third spring is sleeved on the side wall of the connecting rod and located between the first connecting block and the connecting ring;

[0034] The guide groove is arranged on the side wall of the connecting ring and is located on the inner side of the guide plate.

[0035] Further, the liquid injection mechanism comprises:

[0036] The second electric push rod is fixed on the top of the frame and extends to the inner side of the frame. The telescopic shaft of the second electric push rod is fixed with a plate body, and the bottom of the plate body is fixed with injection heads arranged at intervals.

[0037] The present invention also provides a method for using the automatic liquid injection device for a soft-pack lithium battery. The method uses the automatic liquid injection device for a soft-pack lithium battery, and comprises the following steps:

[0038] S1: The soft-pack lithium battery to be injected with electrolyte is limited by a limiting mechanism, and then the soft-pack lithium battery is injected with electrolyte by an injection mechanism;

[0039] S2: After the injection is completed, the injection mechanism is away from the soft-pack lithium battery. At this time, the electrolyte dripping from the injection mechanism is drained through the drainage mechanism.

[0040] The present invention provides a soft-pack lithium battery automatic liquid injection device and method. Compared with the prior art, it has the following beneficial effects:

[0041] 1. The present invention uses a fixing component and a supporting component of a limiting mechanism to facilitate clamping the soft-pack lithium battery from both sides and supporting the bottom of the soft-pack lithium battery, thereby improving the stability of the soft-pack lithium battery limitation and facilitating subsequent liquid injection. The position of the limiting mechanism can be adjusted through a driving component to be suitable for soft-pack lithium batteries of different sizes. The electrolyte dripping from the injection head is drained and collected through a drainage mechanism to prevent the electrolyte from falling on the limiting mechanism, thereby maintaining the injection environment and reducing the waste of electrolyte.

[0042] 2. The present invention simultaneously clamps and supports the soft-pack lithium battery through the fixing assembly and the supporting assembly, which is convenient for the actual limited use of the soft-pack lithium battery, thereby improving the efficiency of the lithium battery injection processing, and is convenient for the simultaneous cancellation of the clamping and support of the soft-pack lithium battery, further improving the efficiency of the soft-pack lithium battery processing.

[0043] 3. The present invention enables the first gear to drive the second gear to accelerate the rotation when the limit plate cancels the clamping of the soft-pack lithium battery, so that the support plate moves a longer distance than the limit plate, so that the support plate is located at the bottom of the limit plate, so that the soft-pack lithium battery can be transported downward along the limit plate without affecting the next clamping and supporting use of the soft-pack lithium battery.

[0044] 4. The present invention adjusts the position of the movable seat through the driving component, which is convenient for the limiting mechanism to clamp and support soft-pack lithium batteries of different sizes. The driving component is also convenient for linkage adjustment of the movement of multiple limiting mechanisms arranged at intervals, so as to facilitate actual adjustment and use, so that the injection head is located at the center of the symmetrically arranged movable seat, so that the injection head can always stably inject liquid into the soft-pack lithium battery and into soft-pack lithium batteries of different sizes.

[0045] 5. The present invention drains and collects the electrolyte dripping from the injection head through a drainage mechanism, so as to collect the electrolyte, avoid the electrolyte affecting the injection environment, and reduce the waste of electrolyte. The height and position of the guide plate can be easily adjusted through the first electric push rod and the third spring, so that the height and position of the guide plate can be adapted to soft-pack lithium batteries of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a schematic diagram of the overall structure of the automatic liquid injection device for soft-pack lithium batteries of the present invention;

[0047] Figure 2 It is a schematic diagram of the structure of the conveyor, workbench, electric slide rail, extension plate and placement seat of the present invention;

[0048] Figure 3 It is a schematic diagram of the structure of the drainage mechanism, the placement seat, the mounting seat, the driving assembly and the limiting mechanism of the present invention;

[0049] Figure 4 It is a schematic diagram of the drainage mechanism structure of the present invention;

[0050] Figure 5 For the present invention Figure 4 A is a schematic diagram of the enlarged structure of the middle part;

[0051] Figure 6 It is a schematic diagram of the cross-sectional structure of the guide plate of the present invention;

[0052] Figure 7 It is a schematic diagram of the structure of the driving assembly, the placement seat and the placement slot of the present invention;

[0053] Figure 8 It is a schematic diagram of the structure of the driving assembly and the limiting mechanism of the present invention;

[0054] Fig. 9 It is a schematic diagram of the structure of the limiting mechanism of the present invention;

[0055] Fig.10 It is a schematic cross-sectional structural diagram of the mobile seat of the present invention;

[0056] Fig.11 It is a schematic diagram of the exploded structure of the fixing assembly of the present invention;

[0057] Fig.12 It is a schematic diagram of the support assembly and the limiting plate structure of the present invention;

[0058] Fig.13 It is a schematic diagram of the support assembly structure of the present invention;

[0059] Fig.14 It is a schematic diagram of the cross-sectional structure of the first support rod and the second support rod of the present invention;

[0060] Fig.15 It is a schematic diagram of the tooth groove and the second support rod structure of the present invention;

[0061] Fig.16 It is a schematic diagram of the structure of the liquid injection mechanism of the present invention.

[0062] The reference numerals involved in the above drawings are: 1, machine; 2, workbench; 3, placement seat; 4, electric slide rail; 5, conveyor; 6, limit mechanism; 7, drainage mechanism; 8, injection mechanism; 9, frame; 10, extension plate; 11, mounting seat; 12, drive assembly; 13, placement slot;

[0063] 61. Moving seat; 62. Fixing assembly; 63. Support assembly;

[0064] 621, limit plate; 622, second electromagnet; 623, guide groove; 624, fourth limit ring; 625, first electromagnet; 626, connecting plate;

[0065] 631, support plate; 632, first support rod; 633, second support seat; 634, third support rod; 635, second support rod; 636, first support seat; 637, support frame; 638, first limiting ring; 639, second limiting ring; 6391, first gear; 6392, shifting groove; 6393, shifting block; 6394, shifting rod; 6395, second gear; 6396, tooth groove; 6397, third limiting ring;

[0066] 71. lifting plate; 72. first electric push rod; 73. base; 74. guide groove; 75. guide assembly; 76. guide seat; 77. guide pipe;

[0067] 751, guide plate; 752, second connecting block; 753, connecting ring; 754, connecting rod; 755, first connecting block; 756, guide flow groove;

[0068] 81. Second electric push rod; 82. Liquid injection head;

[0069] 121. threaded rod; 122. servo motor; 123. second transmission mechanism; 124. first transmission mechanism. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Fig. 9 and Fig.10 , an automatic liquid injection device for soft-pack lithium batteries, comprising a machine platform 1 and a frame 9 fixedly arranged on the top of the machine platform 1, and also comprising a placement seat 3 movably arranged on the top of the machine platform 1, a limiting mechanism 6 arranged in intervals in the placement seat 3 and used to fix the soft-pack lithium battery, and a drainage mechanism 7 arranged on the top of the placement seat 3 for guiding the flow of electrolyte, a liquid injection mechanism 8 extending to the inside of the frame 9 is arranged on the top of the frame 9, and the limiting mechanism 6 includes:

[0072] The movable seat 61 is movably disposed in the placement seat 3 and is symmetrically arranged. The sides of the movable seats 61 that are close to each other are all arc-shaped to limit the soft-pack lithium battery from both sides of the soft-pack lithium battery. The sides of the movable seats 61 that are close to each other are provided with a fixing component 62 for fixing the soft-pack lithium battery;

[0073] See also Fig.11 , the fixing assembly 62 comprises:

[0074] The limiting plate 621 is movably arranged on the inner side of the movable seat 61. The first electromagnet 625 and the second electromagnet 622 are fixedly arranged on the side where the limiting plate 621 and the movable seat 61 are close to each other. The first electromagnet 625, the second electromagnet 622 and the limiting plate 621 are all designed in an arc shape. The bottom of the movable seat 61 is provided with a supporting assembly 63 which is linked with the limiting plate 621 and is used to support the bottom of the soft-pack lithium battery;

[0075] The fixing assembly 62 further includes:

[0076] The connecting plate 626 is fixedly arranged on both sides of the outer side of the limiting plate 621, and the inner side of the connecting plate 626 is vertically aligned with the inner side of the limiting plate 621. The outer side of the connecting plate 626 is fixedly provided with a guide rod, and the side wall of the end of the guide rod away from the connecting plate 626 is fixedly sleeved with a fourth limiting ring 624;

[0077] The guide groove 623 is provided on both sides of the inner side of the movable seat 61 . The guide rod and the fourth limiting ring 624 are both sleeved in the guide groove 623 , and the fourth limiting ring 624 cooperates with the guide groove 623 stopper to limit the guide rod from being separated from the guide groove 623 .

[0078] In a specific implementation, the first electromagnet 625 and the second electromagnet 622 are energized to generate a repulsive force on the side where the first electromagnet 625 and the second electromagnet 622 are close to each other, thereby pushing the first electromagnet 625 and the limit plate 621 to move through the repulsive force, so that the limit plate 621 clamps and limits the outer side of the soft-pack lithium battery, and cooperates with the support assembly 63 to support the bottom of the soft-pack lithium battery, so as to facilitate the subsequent injection of electrolyte into the soft-pack lithium battery through the injection mechanism 8;

[0079] When it is necessary to remove the soft-pack lithium battery after liquid injection from the placement seat 3, the first electromagnet 625 and the second electromagnet 622 are energized to generate suction force on the side where the first electromagnet 625 and the second electromagnet 622 are close to each other, so as to drive the limit plate 621 away from the soft-pack lithium battery, and cooperate with the support assembly 63 to make the support assembly 63 cancel the support for the bottom of the soft-pack lithium battery, so as to facilitate the soft-pack lithium battery after liquid injection to fall onto the conveyor 5 along the placement slot 13;

[0080] The suction or repulsion generated by the first electromagnet 625 and the second electromagnet 622 on the side close to each other can be adjusted by the direction of the current, etc. This is a prior art and will not be described in detail here;

[0081] When the first electromagnet 625 moves, it drives the connecting plate 626 and the guide rod to move, so that the guide rod and the fourth limiting ring 624 move along the guide groove 623, thereby limiting the movement of the first electromagnet 625 and the limiting plate 621 to improve the stability of limiting the soft-pack lithium battery.

[0082] See also Fig.12 , Fig.13 , Fig.14 and Fig.15 , the support assembly 63 comprises:

[0083] The support plate 631 is movably disposed at the bottom of the movable seat 61 . When the support plate 631 approaches the soft-pack lithium battery along with the limiting plate 621 , the side of the support plate 631 that approaches each other is located on the inner side of the limiting plate 621 .

[0084] The support assembly 63 comprises:

[0085] The first support seat 636 is fixedly arranged at the bottom of the movable seat 61. The outer side of the first support seat 636 is sleeved with a first support rod 632 extending to the inner side of the first support seat 636. One end of the first support rod 632 located on the inner side of the first support seat 636 is fixedly connected to the outer side of the support plate 631. The support plate 631 is designed to be arc-shaped.

[0086] The second support seat 633 is fixedly disposed at the bottom of the limiting plate 621, and the lower end of the side wall of the second support seat 633 is sleeved on the side wall of the first support rod 632;

[0087] The first limiting ring 638 is fixedly sleeved on the side wall of the first support rod 632 and is located on the outer side of the first support seat 636, so that the first limiting ring 638 and the first support seat 636 are stopped and matched, thereby limiting the separation of the first support rod 632 and the first support seat 636;

[0088] The second limiting ring 639 is arranged between the first support seat 636 and the second support seat 633, and the inner wall of the second limiting ring 639 is fixedly sleeved on the side wall of the first support rod 632, so that the limiting plate 621 drives the second limiting ring 639 and the first support rod 632 to move through the second support seat 633, thereby driving the support plate 631 to move, and the side wall of the first support rod 632 and located between the second support seat 633 and the support plate 631 are sleeved with a first spring, so that there is space for the second support seat 633 to move between the second support seat 633 and the support plate 631, and the support plate 631 has a tendency to move toward the inner side of the limiting plate 621.

[0089] The support assembly 63 further includes:

[0090] The second support rod 635 is sleeved on the outer side of the first support seat 636 and extends to the inner side of the first support seat 636. A support frame 637 is sleeved on the side wall of one end of the second support rod 635 located on the outer side of the first support seat 636, and the support frame 637 is fixedly connected to the outer side of the first support seat 636. A third limiting ring 6397 is fixedly sleeved on the side wall of one end of the second support rod 635 located on the inner side of the support frame 637. A second spring is sleeved between the side wall of the second support rod 635 and the support frame 637 and the third limiting ring 6397.

[0091] The third support rod 634 is fixedly disposed on one side of the second support seat 633 close to the first support seat 636 , and the side wall of the third support rod 634 is sleeved in the second support rod 635 . The third support rod 634 is provided with a groove for sleeved the second support rod 635 .

[0092] The support assembly 63 further includes:

[0093] The tooth grooves 6396 are arranged horizontally and are opened at the bottom of the second support rod 635;

[0094] The first gear 6391 is disposed between the first support rod 632 and the second support rod 635 and meshes with the tooth groove 6396. The second gear 6395 is meshed with the first gear 6391 on one side close to the support plate 631, and the first gear 6391 drives the second gear 6395 to accelerate. The first gear 6391 and the second gear 6395 are both rotatably connected to the inner side of the first support seat 636 through the mounting frame;

[0095] The shift rod 6394 is fixed at the bottom of the second gear 6395. The top of the first support rod 632 is provided with a shift groove 6392. The bottom inner wall of the shift groove 6392 is fixed with a shift block 6393. The bottom of the shift rod 6394 extends into the shift groove 6392 and is located on the side of the shift block 6393 close to the support plate 631.

[0096] In a specific implementation, when the limiting plates 621 are close to each other to clamp and limit the soft-pack lithium battery, the limiting plates 621 drive the second support seat 633 to move, thereby squeezing the first spring, so that the support plate 631 extends to the inner side of the limiting plate 621 under the elastic support of the first spring, thereby supporting the soft-pack lithium battery from the bottom, improving the stability of the soft-pack lithium battery, and facilitating the subsequent liquid injection;

[0097] When the limiting plates 621 move away from each other to cancel the clamping limit of the soft-pack lithium battery, the limiting plates 621 drive the second support seat 633 to move in the opposite direction, so as to drive the first support rod 632 and the support plate 631 to move in the opposite direction through the second limiting ring 639. Since in this state, the limiting plates 621 and the support plates 631 move synchronously, the support plate 631 is always located on the inner side of the limiting plates 621, thereby affecting the downward conveying of the soft-pack lithium battery. For this reason, when the second support seat 633 moves in the opposite direction, the second support rod 635 is squeezed to compress the second spring to move, and the second support rod 635 moves through the tooth groove 639. 396 drives the first gear 6391 to rotate. Since the first gear 6391 drives the second gear 6395 to accelerate the rotation, the second gear 6395 rotates at a larger angle than the first gear 6391, so that the second gear 6395 drives the lever 6394 to move along the lever groove 6392 to squeeze the lever block 6393 to drive the first support rod 632 and the support plate 631 to move. Under the action of the first spring, the support plate 631 has a certain movement space, so that the support plate 631 is located at the bottom of the limit plate 621, so that the soft-pack lithium battery can be transported downward along the limit plate 621;

[0098] When clamping the soft-pack lithium battery next time, the limiting plates 621 move closer to each other, driving the second support seat 633, the first spring and the supporting plate 631 to move closer to the soft-pack lithium battery. At this time, the third limiting ring 6397 and the second supporting rod 635 are pushed back to their original positions under the action of the second spring, so that the lever 6394 is reset to facilitate the next use;

[0099] By making the supporting plate 631, the limiting plate 621 and the side of the movable seat 61 close to each other all have an arc-shaped design to fit the cylindrical shape of the soft-pack lithium battery, it is convenient for actual clamping and supporting use;

[0100] The first gear 6391 drives the second gear 6395 to accelerate the rotation, which can be adjusted by adjusting the transmission ratio of the first gear 6391 and the second gear 6395. This is a prior art and will not be described in detail here.

[0101] The third support rod 634 is sleeved in the second support rod 635 to limit the third support rod 634, thereby improving the stability of the movement of the third support rod 634, thereby improving the stability of the rotation of the transmission lever 6394, and does not affect the second support seat 633 to drive the second support rod 635 to move.

[0102] See also Figure 1 , Figure 2 , Figure 3 ,and Figure 7 The top of the placement seat 3 is provided with placement slots 13 arranged at intervals, and the movable seats 61 are all located in the placement slots 13;

[0103] A workbench 2 is fixedly provided on the top of the machine 1. The front end of the top of the workbench 2 is designed to be concave, and a conveyor 5 is provided at the concave part of the workbench 2. An electric slide rail 4 symmetrically arranged with the center point of the workbench 2 is fixedly provided on the top of the workbench 2. An extension plate 10 is fixedly provided on the back of the placement seat 3. The sliding end of the electric slide rail 4 is fixedly connected to the bottom of the extension plate 10 so that the placement seat 3 can move to the top of the conveyor 5. A mounting seat 11 is fixedly provided on the side wall of the placement seat 3. A driving component 12 for driving the moving seats 61 to move closer to or away from each other is provided on the top of the mounting seat 11.

[0104] See also Figure 7 and Figure 8 , the driving assembly 12 comprises:

[0105] The servo motor 122 is fixedly mounted on the top of the mounting seat 11. A slide groove is provided on the inner side wall of the through slot 13. A slider is placed inside the slide groove. The sides of the sliders close to each other are fixedly connected to the two sides of the moving seat 61 respectively.

[0106] The threaded rod 121 is rotatably arranged on the side wall of the placement seat 3 and extends into the slide groove. A side wall at one end of the threaded rod 121 located in the slide groove is provided with a bidirectional threaded groove arranged at intervals, and is threadedly connected to the slider to drive the symmetrically arranged moving seats 61 to move closer to or away from each other. The two threaded rods 121 in the same placement slot 13 are transmission connected by a first transmission mechanism 124, and one of the threaded rods 121 in the spaced placement slots 13 is transmission connected by a second transmission mechanism 123, and the output shaft of the servo motor 122 is transmission connected to one of the threaded rods 121.

[0107] The output shaft of the servo motor 122 is fixed with a rotating shaft through a coupling, and the rotating shaft drives one of the threaded rods 121 to rotate through a bevel gear, and the threaded rod 121 drives a threaded rod 121 in the placement slot 13 arranged at intervals to rotate through the second transmission mechanism 123. Therefore, a threaded rod 121 in the placement slot 13 drives another threaded rod 121 in the placement slot 13 to rotate through the first transmission mechanism 124, so that the threaded rod 121 rotates synchronously, so as to synchronously adjust the position of the limit mechanism 6 arranged at intervals. The first transmission mechanism 124 and the second transmission mechanism 123 can adopt the transmission method of transmission gears and chains. This is the existing technology and will not be elaborated here.

[0108] See also Fig.16 , the injection mechanism 8 comprises:

[0109] The second electric push rod 81 is fixed on the top of the frame 9 and extends to the inner side of the frame 9. The telescopic shaft of the second electric push rod 81 is fixed with a plate body, and the bottom of the plate body is fixed with injection heads 82 arranged at intervals.

[0110] In a specific implementation, after the limiting mechanism 6 has completed the limiting of the soft-pack lithium battery, an external pipeline is formed through the injection head 82, so that the electrolyte and the like flow into the injection head 82 along the pipeline, and the height of the injection head 82 is adjusted by the second electric push rod 81, so that the injection head 82 enters the soft-pack lithium battery to inject liquid into the soft-pack lithium battery;

[0111] The number of infusion heads and the limiting mechanism 6 is set correspondingly to facilitate actual injection, which depends on the actual design and will not be described in detail here. The injection head 82 is located at the center of the symmetrically arranged movable seat 61, so that after the position of the movable seat 61 is adjusted, its center position remains unchanged, so that the injection head 82 can always stably inject liquid into the soft-pack lithium battery and the soft-pack lithium batteries of different sizes;

[0112] The placement seat 3 and the limiting mechanism 6 are driven to move by the electric slide rail 4 to facilitate the adjustment of the position of the placement seat 3. When the injection mechanism 8 injects liquid for the first time, liquid is injected into the soft-pack lithium battery on the side of the placement seat 3 close to the conveyor 5, so that after the injection is completed, the soft-pack lithium battery with liquid injection is moved to the top of the conveyor 5, and the placement seat 3 is gradually moved away from the soft-pack lithium battery on the side of the conveyor 5 to the bottom of the injection mechanism 8, so as to facilitate the circulation of liquid injection. The extension plate 10 facilitates the placement seat 3 to be moved to the top of the conveyor 5, so as to facilitate the transportation of the soft-pack lithium battery with liquid injection.

[0113] Example 2: Please refer to Figure 4 , Figure 5 and Figure 6 The technical solution of this embodiment is different from that of the first embodiment in that the drainage mechanism 7 includes:

[0114] The base 73 is fixed on the top of the mounting base 11, and a first electric push rod 72 is fixedly provided inside the base 73. The telescopic axis of the first electric push rod 72 extends to the top of the base 73, and a lifting plate 71 is fixedly provided on the telescopic axis of the first electric push rod 72. A flow guide seat 76 arranged at intervals and extending to the top of the placement seat 3 is fixedly provided on the top of the lifting plate 71. A flow guide groove 74 is opened on the top of the flow guide seat 76, and the depth of the flow guide groove 74 gradually increases from the side close to the lifting plate 71 to the side away from the lifting plate 71. A flow guide pipe 77 connected to the flow guide groove 74 is fixedly provided on the side of the flow guide seat 76 away from the lifting plate 71, and a flow guide component 75 arranged at intervals is provided on the top of the flow guide seat 76.

[0115] The flow guide assembly 75 includes:

[0116] A first connecting block 755 is fixedly arranged on the inner wall of the guide groove 74, a connecting rod 754 is fixedly arranged on the inner side of the first connecting block 755, a connecting ring 753 is sleeved on the side wall of the connecting rod 754, a guide plate 751 is fixedly arranged on the lower end of the connecting ring 753 away from the first connecting block 755, and the guide plate 751 is designed in a semi-annular shape, a second connecting block 752 is fixedly arranged on the end of the connecting rod 754 away from the first connecting block 755, so that the second connecting block 752 cooperates with the connecting ring 753 to stop, thereby limiting the connection ring 753 from being separated from the connecting rod 754, and a third spring is sleeved on the side wall of the connecting rod 754 and located between the first connecting block 755 and the connecting ring 753;

[0117] The flow guide groove 756 is formed on the side wall of the connecting ring 753 and is located on the inner side of the flow guide plate 751 .

[0118] In a specific implementation, after the injection mechanism 8 completes the injection, the placement seat 3 approaches the conveyor 5. At this time, the electrolyte dripped from the injection head 82 falls into the guide plate 751 to receive the electrolyte, so as to prevent the electrolyte from falling on the limiting mechanism 6, etc., and the electrolyte entering the guide plate 751 flows through the guide groove 756 to the guide groove 74 at the top of the guide seat 76. Since the bottom inner wall of the guide groove 74 is inclined, the electrolyte flows to the guide pipe 77, so that the external pipe of the guide pipe 77 can collect the electrolyte, so as to prevent the electrolyte from affecting the injection environment and reduce the waste of the electrolyte.

[0119] The height of the lifting plate 71 and the guide seat 76 is adjusted by the first electric push rod 72, and the connecting ring 753 and the guide plate 751 are elastically supported by setting a third spring so that the guide plate 751 has a certain moving space, so that the height and position of the guide plate 751 can adapt to soft-pack lithium batteries of different sizes.

[0120] The embodiment of the present invention also provides a method for using the automatic liquid injection device for a soft-pack lithium battery, using an automatic liquid injection device for a soft-pack lithium battery, the method comprising the following steps:

[0121] S1: The soft-pack lithium battery to be injected with electrolyte is limited by the limiting mechanism 6, and then the soft-pack lithium battery is injected with electrolyte by the injection mechanism 8;

[0122] S2: After the injection is completed, the injection mechanism 8 is away from the soft-pack lithium battery. At this time, the electrolyte dripping from the injection mechanism 8 is drained by the drainage mechanism 7 to prevent the electrolyte dripping from the injection mechanism 8 from falling on the limiting mechanism 6 and the placement seat 3, so as to maintain the cleanliness of the injection environment and facilitate long-term injection use;

[0123] After the injection is completed, the placement seat 3 is driven by the electric slide rail 4 to approach the conveyor 5, so that the soft-pack lithium battery that has been injected is located at the top of the conveyor 5. Then, the clamping of the soft-pack lithium battery and the support at the bottom are cancelled by the fixing component 62, so that the soft-pack lithium battery that has been injected falls on the conveyor 5. Usually, a tray for storing soft-pack lithium batteries is placed on the conveyor 5. This is a prior art, which is not shown in the figure and will not be described here. The soft-pack lithium battery that has been injected falls from the bottom of the placement seat 3 to the conveyor 5 for transportation. In this process, the soft-pack lithium battery that has not been injected moves to the bottom of the injection mechanism 8 for the next injection, thereby performing cyclic injection and improving the injection efficiency.

[0124] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0125] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0126] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic liquid injection device for soft-pack lithium batteries, comprising a machine platform and a frame fixed on the top of the machine platform, characterized in that: It also includes a placement seat movably arranged on the top of the machine, a limiting mechanism arranged in intervals in the placement seat and used to fix the soft-pack lithium battery, and a drainage mechanism arranged on the top of the placement seat to guide the flow of electrolyte. The top of the frame is provided with a liquid injection mechanism extending to the inside of the frame, and the limiting mechanism includes: The movable seat is movably arranged in the placement seat and is symmetrically arranged. The sides of the movable seats close to each other are all designed in an arc shape to limit the soft-pack lithium battery from both sides of the soft-pack lithium battery. The sides of the movable seats close to each other are provided with a fixing component for fixing the soft-pack lithium battery, and the fixing component includes: The limiting plate is movably arranged on the inner side of the moving seat, and the first electromagnet and the second electromagnet are fixedly arranged on the side where the limiting plate and the moving seat are close to each other, respectively. The first electromagnet, the second electromagnet and the limiting plate are all designed in an arc shape. The bottom of the moving seat is provided with a supporting assembly which is linked with the limiting plate and is used to support the bottom of the soft-pack lithium battery. The supporting assembly includes: The support plate is movably arranged at the bottom of the movable seat. When the support plate approaches the soft-pack lithium battery along with the limiting plate, the side of the support plate close to each other is located on the inner side of the limiting plate.

2. The automatic liquid injection device for soft-pack lithium batteries according to claim 1, characterized in that: The support assembly comprises: The first support seat is fixedly arranged at the bottom of the movable seat, the outer side of the first support seat is sleeved with a first support rod extending to the inner side of the first support seat, one end of the first support rod located on the inner side of the first support seat is fixedly connected to the outer side of the support plate, and the support plate is designed in an arc shape; The second support seat is fixedly arranged at the bottom of the limiting plate, and the lower end of the side wall of the second support seat is sleeved on the side wall of the first support rod; A first limiting ring is fixedly sleeved on the side wall of the first support rod and is located outside the first support seat, so that the first limiting ring cooperates with the first support seat stopper, thereby limiting the first support rod from being separated from the first support seat; The second limiting ring is arranged between the first support seat and the second support seat, and the inner wall of the second limiting ring is fixedly sleeved on the side wall of the first support rod, so that the limiting plate drives the second limiting ring and the first support rod to move through the second support seat, thereby driving the support plate to move. The side wall of the first support rod and the first spring is sleeved between the second support seat and the support plate, so that there is space for the second support seat to move between the second support seat and the support plate, and the support plate has a tendency to move toward the inside of the limiting plate.

3. The automatic liquid injection device for soft-pack lithium batteries according to claim 2, characterized in that: The support assembly also includes: The second support rod is sleeved on the outer side of the first support seat and extends to the inner side of the first support seat. The side wall of one end of the second support rod located on the outer side of the first support seat is sleeved with a support frame, and the support frame is fixedly connected to the outer side of the first support seat. The side wall of one end of the second support rod located on the inner side of the support frame is fixedly sleeved with a third limiting ring, and the side wall of the second support rod is sleeved with a second spring between the support frame and the third limiting ring; The third support rod is fixedly arranged on one side of the second support seat close to the first support seat, and the side wall of the third support rod is sleeved in the second support rod. The third support rod is provided with a groove for sleeved the second support rod.

4. The automatic liquid injection device for soft-pack lithium batteries according to claim 3, characterized in that: The support assembly also includes: The tooth grooves are arranged horizontally and are opened at the bottom of the second support rod; A first gear is disposed between the first support rod and the second support rod and meshes with the tooth groove. A second gear is meshed on a side of the first gear close to the support plate, and the first gear drives the second gear to perform an accelerated motion. The first gear and the second gear are both rotatably connected to the inner side of the first support seat through a mounting frame; The shift rod is fixed at the bottom of the second gear. The top of the first support rod is provided with a shift slot. The bottom inner wall of the shift slot is fixed with a shift block. The bottom of the shift rod extends into the shift slot and is located on the side of the shift block close to the support plate.

5. The automatic liquid injection device for soft-pack lithium batteries according to claim 1, characterized in that: The fixing assembly also includes: The connecting plate is fixedly arranged on both sides of the outer side of the limiting plate, and the inner side of the connecting plate is vertically aligned with the inner side of the limiting plate. The outer side of the connecting plate is fixedly provided with a guide rod, and the side wall of the end of the guide rod away from the connecting plate is fixedly provided with a fourth limiting ring; The guide groove is arranged on both sides of the inner side of the movable seat. The guide rod and the fourth limiting ring are both sleeved in the guide groove, and the fourth limiting ring cooperates with the guide groove stopper to limit the guide rod from being separated from the guide groove.

6. The automatic liquid injection device for soft-pack lithium batteries according to claim 1, characterized in that: The top of the placement seat is provided with placement slots arranged at intervals, and the movable seats are all located in the placement slots; A workbench is fixedly provided on the top of the machine, the front end of the top of the workbench is designed to be concave, and a conveyor is provided at the concave part of the workbench, an electric slide rail symmetrically arranged with the center point of the workbench is fixedly provided on the top of the workbench, an extension plate is fixedly provided on the back of the placement seat, and the sliding end of the electric slide rail is fixedly connected to the bottom of the extension plate so that the placement seat can move to the top of the conveyor, a mounting seat is fixedly provided on the side wall of the placement seat, and a driving assembly for driving the moving seats to move closer to or away from each other is provided on the top of the mounting seat, and the driving assembly includes: The servo motor is fixedly arranged on the top of the mounting seat, the inner side wall of the placement slot is provided with a slide slot, a slider is placed inside the slide slot, and the sides of the sliders close to each other are respectively fixedly connected to the two sides of the moving seat; A threaded rod is rotatably arranged on the side wall of the placement seat and extends into the slide groove. A side wall at one end of the threaded rod located in the slide groove is provided with a bidirectional threaded groove arranged at intervals and is threadedly connected to the slider to drive the symmetrically arranged moving seats to move closer to or away from each other. The two threaded rods in the same placement slot are connected by a first transmission mechanism, and one of the threaded rods in the spaced placement slots is connected by a second transmission mechanism, and the output shaft of the servo motor is connected by one of the threaded rods.

7. The automatic liquid injection device for soft-pack lithium batteries according to claim 1, characterized in that: Drainage agencies include: The base is fixed on the top of the mounting base, and a first electric push rod is fixedly provided inside the base, and a telescopic shaft of the first electric push rod extends to the top of the base, and a lifting plate is fixedly provided on the telescopic shaft of the first electric push rod, and a flow guide seat arranged at intervals and extending to the top of the placement seat is fixedly provided on the top of the lifting plate, a flow guide groove is opened on the top of the flow guide seat, and the depth of the flow guide groove gradually increases from the side close to the lifting plate to the side away from the lifting plate, a flow guide pipe connected to the flow guide groove is fixedly provided on the side of the flow guide seat away from the lifting plate, and a flow guide component arranged at intervals is provided on the top of the flow guide seat.

8. The automatic liquid injection device for soft-pack lithium batteries according to claim 7, characterized in that: The flow guide assembly comprises: A first connecting block is fixedly arranged on the inner wall of the guide groove, a connecting rod is fixedly arranged on the inner side of the first connecting block, a connecting ring is sleeved on the side wall of the connecting rod, a guide plate is fixedly arranged on the lower end of the connecting ring away from the first connecting block, and the guide plate is designed in a semi-ring shape, a second connecting block is fixedly arranged on the end of the connecting rod away from the first connecting block, so that the second connecting block cooperates with the connecting ring stopper, thereby limiting the connection ring from being separated from the connecting rod, and a third spring is sleeved on the side wall of the connecting rod and located between the first connecting block and the connecting ring; The guide groove is arranged on the side wall of the connecting ring and is located on the inner side of the guide plate.

9. The automatic liquid injection device for soft-pack lithium batteries according to claim 1, characterized in that: The liquid injection mechanism comprises: The second electric push rod is fixed on the top of the frame and extends to the inner side of the frame. The telescopic shaft of the second electric push rod is fixed with a plate body, and the bottom of the plate body is fixed with injection heads arranged at intervals.

10. A method for using a soft-pack lithium battery automatic liquid injection device, characterized in that: Using the automatic liquid injection device for soft-pack lithium batteries according to any one of claims 1 to 9, the method The following steps are involved: S1: The soft-pack lithium battery to be injected with electrolyte is limited by a limiting mechanism, and then the soft-pack lithium battery is injected with electrolyte by an injection mechanism; S2: After the injection is completed, the injection mechanism is away from the soft-pack lithium battery. At this time, the electrolyte dripping from the injection mechanism is drained through the drainage mechanism.

Images