Fully automatic liquid injection machine

Abstract

This invention relates to a fully automatic liquid injection machine, comprising a battery loading mechanism and a battery unloading mechanism. A clamp conveyor line is located at the front of both the loading and unloading mechanisms. The clamp conveyor line is composed of multiple bidirectional conveying modules spliced ​​together in a rectangular loop. A liquid injection station is located at the rear left end of the clamp conveyor line, and the liquid injection station is equipped with a liquid injection mechanism located above the liquid injection clamp. Several stationary stations are located on both the front and inner sides of the clamp conveyor line. Each stationary station is equipped with a first unidirectional conveying module for longitudinally conveying the liquid injection clamp. A stationary mechanism is located directly above the first unidirectional conveying module. By utilizing multiple bidirectional conveying modules to form a loop-shaped clamp conveyor line, and by setting multiple stationary stations on both the inner and front sides of the clamp conveyor line, not only is production capacity increased, but the clamp conveyor line can also continue to transport batteries even when they are stationary at a stationary station or when a stationary station malfunctions, effectively reducing the logistics time of the liquid injection clamp and improving work efficiency.

Description

Technical fields: This invention relates to a fully automatic liquid injection machine. Background technology: With continuous social development and technological progress, automated production has become a trend, gradually replacing traditional manual labor and injecting new momentum into the sustainable development of enterprises. Therefore, battery manufacturers also need to keep pace with the times, actively promote technological transformation and upgrading, and vigorously develop automated production to improve their "intelligent manufacturing" level and achieve sustainable development.

[0003] The electrolyte filling process is a crucial step in the production of square aluminum-cased lithium batteries. Currently, the electrolyte filling process for square aluminum-cased lithium batteries requires loading and pre-weighing of the batteries; after electrolyte filling, post-weighing and unloading are also necessary. How to more rationally configure the various components to improve the level of mechanization and automation of the entire electrolyte filling process is a technical problem that the company's R&D personnel need to solve.

[0004] Currently, the basic forms of liquid filling machines on the market are linear or rotary types. In this type of structure, each station is arranged sequentially. When a station malfunctions and needs maintenance, all stations need to be stopped, affecting work efficiency. Moreover, after the battery is filled with liquid, it needs to be transported sequentially to the negative pressure station and the positive pressure station for settling (or sequentially to the positive pressure station and the negative pressure station). However, since the settling time is relatively long, the battery is transported to the next station only after the settling time of one station is completed. This greatly increases the battery logistics time and reduces work efficiency. Summary of the Invention: The present invention addresses the problems existing in the prior art, namely, the technical problem to be solved by the present invention is to provide a fully automatic liquid injection machine with a reasonable design and improved work efficiency.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a fully automatic liquid injection machine, comprising a battery feeding mechanism and a battery unloading mechanism distributed on the left and right sides. The front side of the battery feeding mechanism and the battery unloading mechanism is provided with a clamp conveyor line for conveying the liquid injection clamp. The clamp conveyor line is composed of multiple bidirectional conveying modules spliced ​​together in a rectangular ring shape. The rear left end of the clamp conveyor line is provided with a liquid injection station. The liquid injection station is provided with a liquid injection mechanism located above the liquid injection clamp. The front and inner sides of the clamp conveyor line are provided with several horizontally arranged stationary stations. Each stationary station is provided with a first unidirectional conveying module for conveying the liquid injection clamp longitudinally. The stationary mechanism is located directly above the first unidirectional conveying module.

[0007] Furthermore, the liquid injection fixture includes a sealed cavity for encapsulating the battery. A mating seat plate is fixed above the sealed cavity. A liquid injection cup is vertically inserted through the mating seat plate. The lower end of the liquid injection cup extends into the sealed cavity and corresponds to the position of the liquid injection port of the battery. The liquid injection seat plate is pressed above the liquid injection cup. The liquid injection seat plate has a liquid injection hole and a vacuum suction hole that communicate with the liquid injection cup. The mating seat plate has a positive pressure air hole and a negative pressure air hole, which are respectively connected to the inside of the sealed cavity through pipes.

[0008] Furthermore, the sealing cavity includes an upper sealing cavity and a lower sealing cavity connected by a quick-locking mechanism. The top perimeter of the upper sealing cavity is connected to the bottom surface of the mating seat plate by a vertical connecting rod. The interior of the lower sealing cavity is provided with several relatively independent battery compartments arranged in a matrix, and each battery compartment has several battery slots along its length.

[0009] Furthermore, each battery compartment has a liquid injection plate fixed on the top surface of the mating plate. Each liquid injection plate has several liquid injection holes arranged side by side along its length. The positions of the liquid injection holes correspond to the positions of the battery slots. There is a liquid injection cup between the liquid injection hole and the battery slot. Each liquid injection hole has a vacuum suction hole on its side.

[0010] Furthermore, the bidirectional conveying module includes a conveying base A, the upper end of which is provided with a pair of transverse conveying roller groups distributed in front and rear, and between the pair of transverse conveying roller groups is a pair of longitudinal conveying roller groups A distributed in left and right, and the pair of longitudinal conveying roller groups A is driven to rise and fall by a lifting mechanism; the first unidirectional conveying module includes a conveying base B, the upper end of which is provided with a pair of longitudinal conveying roller groups B distributed in left and right.

[0011] Furthermore, the lifting mechanism includes a lifting frame, which is driven to move vertically by a cam assembly located below it; a pair of longitudinal conveying rollers are installed at the upper end of the lifting frame; the cam assembly includes a pair of front and rear distributed cam plates, which are driven to move laterally by a power assembly; a pair of left and right distributed lifting rods are provided above the cam plates, the top of the lifting rods is fixedly connected to the bottom of the lifting frame, and rollers are installed at the lower end of the lifting rods; the left and right ends of the cam plates are respectively provided with lifting inclined surfaces corresponding to the positions of the lifting rods, and the upper and lower ends of the lifting inclined surfaces are respectively connected to an upper plane and a lower plane; the rollers roll along the upper plane, the lifting inclined surfaces, and the lower plane.

[0012] Furthermore, the liquid injection mechanism includes a lifting plate, the bottom surface of which is provided with vacuum nozzles corresponding to the positions of each vacuum suction hole, and the top surface of which is provided with liquid injection mechanisms corresponding to the positions of each liquid injection hole. One liquid injection hole corresponds to one liquid injection mechanism. The liquid injection mechanism includes a constant flow pump, the inlet of which is connected to the electrolyte storage tank, and the outlet of which is connected to the liquid injection valve.

[0013] Furthermore, the top surface of the mating seat plate is provided with an annular sealing groove, and the liquid injection seat plate, positive pressure air hole and negative pressure air hole are all located inside the sealing groove; the stationary mechanism includes a liftable sealing plate, and a positive pressure air pipe and a negative pressure air pipe are connected to the sealing plate, and the positive pressure air pipe and the negative pressure air pipe correspond to the positions of the positive pressure air hole and the negative pressure air hole, respectively.

[0014] Furthermore, the clamp conveyor line has an opening at the middle of its rear end, and a clamp disassembly and assembly mechanism located above the liquid injection clamp is provided at the opening of the clamp conveyor line. A clamp assembly station connected to the battery feeding mechanism is provided between the clamp disassembly and assembly mechanism and the liquid injection station. A clamp disassembly station connected to the battery unloading mechanism is provided on the right side of the clamp disassembly and assembly mechanism. A pair of left and right connecting plates are fixed at both the front and rear ends of the top of the mating base plate. The connecting plates are provided with connecting holes for cooperating with the locking mechanism at the stationary station. The clamp disassembly and assembly mechanism includes a moving base driven by a transverse moving mechanism to move between the clamp assembly station and the clamp disassembly station. A lifting cylinder is installed in the middle of the bottom surface of the moving base. The cylinder rod of the lifting cylinder extends downward and is equipped with a disassembly and assembly lifting base. The top surface of the disassembly and assembly lifting base is provided with a pneumatic clamping clamp corresponding to the position of the connecting plate. The actuating end of the pneumatic clamping clamp is used to pass through the connecting hole and clamp upward.

[0015] Furthermore, the rear sides of the fixture assembly station and the fixture disassembly station are respectively provided with a second unidirectional conveying module and a third unidirectional conveying module for longitudinally conveying the liquid injection fixture; the battery loading mechanism includes, from left to right, an incoming conveyor belt, a loading barcode testing module, a loading weighing module, a loading buffer conveyor mechanism, and a loading NG buffer conveyor mechanism. Batteries conveyed from left to right by the incoming conveyor belt are sequentially moved by the loading robot to the loading barcode testing module and the loading weighing module. The loading robot moves the batteries weighed by the loading weighing module to the loading buffer conveyor mechanism or the loading NG buffer conveyor mechanism. Batteries conveyed from back to front by the loading buffer conveyor mechanism are loaded... The material handling robot moves to the liquid injection fixture on the second one-way conveying module; the battery unloading mechanism includes, from left to right, a loading barcode scanning test module, an unloading weighing module, an unloading buffer conveying mechanism, an unloading NG buffer conveying mechanism, and an unloading pull belt. The batteries inside the liquid injection fixture on the third one-way conveying module are moved to the unloading barcode scanning test module by the unloading robot. The batteries on the unloading barcode scanning test module are moved sequentially to the unloading weighing module, the unloading buffer conveying mechanism, or the unloading NG buffer conveying mechanism by the unloading robot. The batteries output from the unloading buffer conveying mechanism from front to back are output by the unloading pull belt. A battery liquid injection port wiping mechanism is provided above the unloading buffer conveying mechanism.

[0016] Compared with the prior art, the present invention has the following advantages: The present invention has a reasonable structural design, which uses multiple bidirectional conveying modules to form a ring-shaped fixture conveying line. Multiple stationary positions are set on the inner and front sides of the fixture conveying line, which not only improves production capacity, but also ensures that the fixture conveying line can still transport batteries normally when they are stationary or when a stationary position malfunctions. This effectively reduces the logistics time of the liquid injection fixture and improves work efficiency. Attached image description: Figure 1 This is a schematic diagram of the layout structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the workflow of an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the liquid injection clamp in an embodiment of the present invention; Figure 4 This is a schematic diagram of the front cross-sectional structure of the injection clamp in an embodiment of the present invention; Figure 5 This is a top view schematic diagram of the liquid injection clamp in an embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the upper sealing cavity and the mating seat plate in an embodiment of the present invention; Figure 7 This is a three-dimensional structural diagram of the lower sealing cavity in an embodiment of the present invention; Figure 8This is a three-dimensional structural diagram of the mating seat plate in an embodiment of the present invention; Figure 9 This is a three-dimensional structural diagram of the injection cup in an embodiment of the present invention; Figure 10 This is a side view of the structure at the injection station in an embodiment of the present invention; Figure 11 This is a side view of the structure at the stationary workstation in an embodiment of the present invention; Figure 12 This is a schematic diagram of the main structure at the stationary workstation in an embodiment of the present invention; Figure 13 This is a three-dimensional structural diagram of the bidirectional transmission module in an embodiment of the present invention; Figure 14 This is a top view schematic diagram of the bidirectional transmission module in an embodiment of the present invention; Figure 15 This is a schematic diagram of the internal structure of the bidirectional transmission module in an embodiment of the present invention. Figure 1 ; Figure 16 This is a schematic diagram of the internal structure of the bidirectional transmission module in an embodiment of the present invention. Figure 2 ; Figure 17 This is a schematic diagram of the internal structure of the conveying base A in an embodiment of the present invention; Figure 18 This is a three-dimensional structural diagram of the cam plate in an embodiment of the present invention; Figure 19 This is a top view schematic diagram of the structure of several bidirectional transmission modules spliced ​​together in an embodiment of the present invention; Figure 20 This is a schematic diagram of the fixture assembly / disassembly mechanism and the fixture assembly station and fixture disassembly station; Figure 21 yes Figure 20 Enlarged view of point D in the image; Figure 22 This is a three-dimensional structural diagram of the clamp disassembly and assembly mechanism in an embodiment of the present invention; Figure 23 This is a front view schematic diagram of the clamp disassembly and assembly mechanism in an embodiment of the present invention.

[0018] Figure 1 middle: 101-Battery loading mechanism; 102-Battery unloading mechanism; 103-Clamp conveyor line; 104-Bidirectional conveyor module; 105-Injection station; 106-Stationary station; 107-First unidirectional conveyor module; 108-Clamp assembly / disassembly mechanism; 109-Clamp assembly station; 121-Clamp disassembly station; 122-Second unidirectional conveyor module; 123-Third unidirectional conveyor module; 124-Incoming material conveyor belt; 125-Loading barcode scanning and testing module; 126-Loading weighing module; 127-Loading buffer conveyor mechanism; 128-Loading NG buffer conveyor mechanism ; 129-Loading robot; 130-Filling robot; 131-Unloading barcode scanning test module; 132-Unloading weighing module; 133-Unloading buffer conveyor mechanism; 134-Unloading NG buffer conveyor mechanism; 135-Discharge pull belt; 136-Discharge robot; 137-Unloading robot; 138-Battery filling port wiping mechanism; 139-Injection mechanism; 140-Stationary mechanism; 141-Horizontal movement mechanism; 142-Moving seat; 143-Lifting cylinder; 144-Disassembly and assembly lifting seat; 145-Second pneumatic clamping clamp; 146-Negative pressure extraction tube.

[0019] Figure 3-12 middle: 01-Sealed cavity; 02-Battery; 03-Matching seat plate; 04-Injection cup; 05-Injection seat plate; 06-Injection hole; 07-Vacuum suction hole; 08-Positive pressure vent; 09-Negative pressure vent; 010-Pipe; 011-Upper sealed cavity; 012-Lower sealed cavity; 013-Battery compartment; 014-Battery slot; 015-Elastic base plate; 016-First positioning pin; 017-Positioning socket; 018- Positioning hole; 019-Quick lock; 020-Vertical connecting rod; 021-Mounting hole; 022-Annular flange; 023-Sealing ring; 024-Sealing groove; 025-Connecting plate; 026-Connecting hole; 027-Positive pressure air pipe; 028-First pneumatic clamping clamp; 029-Lifting plate; 030-Vacuum nozzle; 031-Constant flow pump; 032-Injection valve; 033-Sealing plate; 034-Negative pressure air pipe; Figure 13-19 middle: 11-Conveying base A; 12-Transverse conveying roller assembly; 13-Vertical conveying roller assembly A; 14-Transverse through groove; 15-Lifting frame; 16-Cam plate; 17-Lifting top rod; 18-Roller; 19-Recess; 110-Lifting inclined plane; 111-Upper plane; 112-Lower plane; 113-Arc surface; 114-Transverse cylinder; 115-Transverse guide rail; 116-Vertical connecting rod; 117-Guide hole; 118-Vertical guide rod; 119-Positioning cylinder; 120-Second positioning pin. Detailed implementation method: The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0022] like Figures 1-19 As shown, the present invention discloses a fully automatic liquid injection machine, including a battery feeding mechanism 101 and a battery unloading mechanism 102 distributed on the left and right sides. The battery feeding mechanism 101 and the battery unloading mechanism 102 are provided with a clamp conveying line 103 for conveying the liquid injection clamp on the front side. The battery is placed inside the liquid injection clamp. The clamp conveying line 103 is composed of multiple bidirectional conveying modules 104 spliced ​​together in a rectangular ring shape. The clamp conveying line 103 conveys the liquid injection clamp in a rectangular ring shape. A liquid injection station 105 is provided at the rear of the left end of the clamp conveying line 103. The liquid injection station 105 is provided with a liquid injection mechanism 139 located above the liquid injection clamp. The clamp conveying line 103 is provided with several horizontally arranged station 106 on the front and inner sides. Each station 106 is provided with a first unidirectional conveying module 107 for conveying the liquid injection clamp in the longitudinal direction. A station 140 is provided directly above the first unidirectional conveying module 107.

[0023] During operation, the battery loading mechanism 101 transports the batteries 02 to be injected with electrolyte to the electrolyte injection fixture on the fixture conveyor line 103. The fixture conveyor line 103 first transports the electrolyte injection fixture to the electrolyte injection station 105, where the electrolyte injection mechanism 1039 performs electrolyte injection on the batteries in the fixture. After the electrolyte injection is completed, the fixture conveyor line 103 transports the electrolyte injection fixture to its front end, where it can be transported to any stationing station 106 using the first one-way conveyor module 103. At the stationing station 106, the stationing mechanism 140 applies positive and negative pressure to the batteries in the fixture for stationing. After stationing, the electrolyte injection fixture is transported back to the fixture conveyor line 103 using the first one-way conveyor module 107, and then transported to the battery unloading mechanism 102. The battery unloading mechanism removes the injected batteries from the fixture. The clamp conveyor line is composed of multiple bidirectional conveying modules in a ring shape. Multiple stationary positions are set on the inner and front sides of the clamp conveyor line. This not only increases production capacity, but also ensures that the clamp conveyor line can still transport batteries normally when they are stationary or when a stationary position malfunctions. This effectively reduces the logistics time of the liquid injection clamps and improves work efficiency.

[0024] In this embodiment, as Figure 3-9 As shown, the liquid injection fixture includes a sealed cavity 01 for encapsulating the battery 02. A mating seat plate 03 is fixed above the sealed cavity 01. A liquid injection cup 04 is vertically inserted through the mating seat plate 03. The lower end of the liquid injection cup 04 extends into the sealed cavity 1 and corresponds to the position of the liquid injection port of the battery. A liquid injection seat plate 05 is pressed above the liquid injection cup 04. The liquid injection seat plate 05 is fixed to the top surface of the mating seat plate 01. The liquid injection seat plate 05 has a liquid injection hole 06 and a vacuum suction hole 07 that communicate with the liquid injection cup 04. The mating seat plate 03 has a positive pressure air hole 08 and a negative pressure air hole 09. The positive pressure air hole 08 and the negative pressure air hole 09 are respectively connected to the inside of the sealed cavity 01 through pipes 010. During operation, the mounting plate has injection holes and vacuum suction holes, which can be easily adapted to the injection station. The vacuum suction holes are used to cooperate with the vacuuming mechanism of the injection station to vacuum the injection cup and battery for injection. The injection holes cooperate with the injection mechanism of the injection empty position, and the injection mechanism injects the battery through the injection holes and injection cup. The positive pressure vents and negative pressure vents on the mounting plate are used to cooperate with the static placement position to create a positive pressure environment or a negative pressure environment inside the sealed cavity, which facilitates positive pressure static placement or negative pressure static placement of the battery.

[0025] In this embodiment, the sealing cavity is cuboid in shape and includes an upper sealing cavity 011 and a lower sealing cavity 012 that are detachably connected by a quick-locking mechanism. Both the upper sealing cavity 011 and the lower sealing cavity 012 are groove-shaped. The lower sealing cavity 012 has a plurality of battery compartments 013 arranged in a matrix inside. The plurality of battery compartments 013 are separated by horizontal and vertical partitions to achieve relative independence. Each battery compartment 013 has a plurality of battery slots 014 along its length to facilitate vertical insertion of batteries.

[0026] In this embodiment, a liquid injection plate 05 is fixed to the top surface of the mating plate 03 at the corresponding position of each battery compartment. That is, there are several liquid injection plates 05 arranged in a matrix. Each liquid injection plate 05 has several liquid injection holes 06 arranged side-by-side along its length. The positions of the several liquid injection holes 06 correspond to the positions of several battery slots. A liquid injection cup is located between the corresponding liquid injection hole and the battery slot. A vacuum suction hole 07 is located beside each liquid injection hole 06. That is, each battery slot corresponds to one liquid injection cup, and one liquid injection cup corresponds to one liquid injection hole and one vacuum suction hole. Furthermore, the lower end of the liquid injection cup is connected to the liquid injection port of the battery via a liquid injection nozzle.

[0027] In this embodiment, the bottom of the battery slot 014 is provided with an elastic base plate 15 to eliminate the problem of poor sealing between the upper and lower sealing cavities caused by height error.

[0028] In this embodiment, the upper sealing cavity 011 covers the upper end of the lower sealing cavity 012. The front and rear sides of the upper sealing cavity 11 are each provided with a pair of first positioning pins 016 distributed to the left and right. The front and rear sides of the lower sealing cavity 012 are each provided with a pair of positioning sockets 017. The positions of the pair of positioning sockets 017 correspond to the positions of the pair of first positioning pins 016. The positioning sockets 017 are provided with positioning holes 018 that cooperate with the first positioning pins 016. When the upper sealing cavity 11 covers the lower sealing cavity 012, the positioning pins 016 are inserted into the positioning holes 018, achieving accurate positioning of the upper and lower sealing cavities. Furthermore, to ensure a secure connection between the upper and lower sealing cavities and prevent loosening from affecting the seal, a pair of quick-locking buckles 019 distributed to the front and rear are provided on both the left and right sides of the sealing cavity. That is, the left ends of the upper sealing cavity 011 and the lower sealing cavity 012, and the right ends of the upper sealing cavity 011 and the lower sealing cavity 012 are connected by quick-locking buckles 019. It should be noted that quick-lock is an existing mature product, also known as bolt-type quick clamp, quick clamp lock, etc. Its specific structure and working principle will not be repeated here.

[0029] In this embodiment, the top periphery of the upper sealing cavity 011 is connected to the bottom surface of the mating seat plate 03 via a vertical connecting rod 020.

[0030] In this embodiment, a mounting hole 021 is provided on the mating seat plate 03 at a position corresponding to the position of the injection cup 04, which facilitates the passage of the injection cup. The mounting hole is a stepped hole. An annular flange 022 is provided on the upper outer peripheral side of the injection cup 04. The annular flange 022 is located above the stepped surface of the mounting hole 021. A sealing ring 023 is fitted on the outer end of the annular flange 022. The sealing ring 023 is pressed onto the stepped surface of the mounting hole 021 by the injection seat plate 05. By pressing the sealing ring down by the injection seat plate, a good sealing effect can be achieved on the upper edge of the injection cup.

[0031] In this embodiment, the top surface of the mating seat plate 03 is provided with an annular sealing groove 24, and the liquid injection seat plate 05, the positive pressure air hole 08, and the negative pressure air hole 09 are all located inside the sealing groove 024. Figure 11 , 12 As shown, the stationary mechanism 104 includes a liftable sealing plate 033. A positive pressure air pipe 027 and a negative pressure air pipe 034 are connected to the sealing plate 033, and the positive pressure air pipe 027 and negative pressure air pipe 034 correspond to the positions of the positive pressure air hole 08 and the negative pressure air hole 09, respectively. When the injection clamp is in the stationary position, the sealing plate of the stationary position is vertically aligned with the mating seat plate. The annular sealing strip on the bottom surface of the sealing plate is embedded in the sealing groove on the top surface of the mating seat plate, achieving a seal.

[0032] In this embodiment, the sealing plate 033 is driven to move vertically upwards by a stationary lifting cylinder located above it. Locking mechanisms are provided at both the left and right ends of the top of the sealing plate 033, and a ring-shaped sealing strip is provided on the bottom surface of the sealing plate. A pair of L-shaped connecting plates 025, distributed to the left and right, are fixed at both the front and rear ends of the top of the mating seat plate 03. The connecting plates 025 have connecting holes 026 for engaging with the locking mechanisms. Preferably, the locking mechanism is a first pneumatic clamp 028. The actuating end of the first pneumatic clamp 028 passes through the connecting hole and clamps upwards, achieving a tight fit between the sealing plate and the mating seat plate. It should be noted that the first pneumatic clamp is a mature existing product, and its specific structure and working principle will not be described in detail here. During the settling process, the liquid injection clamp is located below the sealing plate 033 at the settling station. The sealing plate 033 moves downward and aligns with the mating seat plate 03. The annular sealing strip on the bottom surface of the sealing plate is embedded in the sealing groove on the top surface of the mating seat plate. Then, the actuating end of the pneumatic clamping clamp 028 on the top surface of the sealing plate passes through the connecting hole and clamps upward, achieving a tight fit between the sealing plate 033 and the mating seat plate 03. Afterward, the positive pressure air pipe 027 inputs positive pressure into the sealing cavity through the positive pressure air hole, or the negative pressure air pipe 034 draws the inside of the sealing cavity into negative pressure through the negative pressure air hole, allowing the battery to be settling in either a positive or negative pressure environment. In other words, a single settling station can perform both positive and negative pressure settling without the need to transfer the liquid injection clamp, reducing battery logistics time and improving work efficiency.

[0033] In this embodiment, as Figure 10 As shown, the liquid injection mechanism 140 includes a lifting plate 029, which is driven to rise and fall vertically by a liquid injection lifting cylinder located above it. The bottom surface of the lifting plate 029 is provided with vacuum nozzles 030 corresponding to the positions of each vacuum suction hole. The top surface of the lifting plate 029 is provided with liquid injection mechanisms corresponding to the positions of each liquid injection hole, with one liquid injection hole corresponding to one liquid injection mechanism. The liquid injection mechanism includes a constant flow pump 031, the inlet of which is connected to an electrolyte storage tank. The outlet of 31 is connected to the injection valve 032, which adopts a ceramic valve core (the structure disclosed in CN202122851953.7). During injection, the lifting plate 029 moves downward and approaches the mating seat plate 03. The injection valve mates with the injection hole, and the vacuum nozzle 030 mates with the vacuum suction hole 07. The vacuum nozzle 030 first evacuates the injection cup and battery through the vacuum suction hole. Then the injection valve opens and delivers electrolyte to the injection cup. The electrolyte is then input from the battery's injection port through the injection cup.

[0034] This liquid injection fixture features a mating seat plate above the sealed cavity, which has liquid injection holes and vacuum suction holes, making it easy to match with the liquid injection station for liquid injection. The positive pressure air holes and negative pressure air holes on the mating seat plate can be matched with the static placement station, facilitating positive or negative pressure static placement after liquid injection. This allows for continuous use of the battery liquid injection and static placement processes without the need to install or remove the battery, making it convenient to use and improving production efficiency.

[0035] In this embodiment, as Figure 13-19 As shown, the bidirectional conveying module includes a conveying base A11. The upper end of the conveying base A11 is provided with a pair of horizontally distributed conveying roller sets 12, positioned front to back. Between the pair of horizontally distributed conveying roller sets 12 are a pair of vertically distributed conveying roller sets A13, positioned left to right. The vertically distributed conveying roller sets A13 are perpendicular to the horizontally distributed conveying roller sets 12. The pair of vertically distributed conveying roller sets A13 are driven to rise and fall vertically by a lifting mechanism. During operation, the pair of horizontally distributed conveying roller sets 12 convey the injection clamp horizontally. At this time, the pair of vertically distributed conveying roller sets A13 are positioned below the pair of horizontally distributed conveying roller sets 12 under the drive of the lifting mechanism. When it is necessary to change the direction of the injection clamp to 90 degrees, the lifting mechanism drives the pair of vertically distributed conveying roller sets A13 to rise until they contact the injection clamp, and then the injection clamp is conveyed vertically.

[0036] Preferably, the conveying base A11 has a rectangular groove shape, and the upper end of the conveying base A11 is provided with a transverse through groove 14. A pair of transverse conveying roller sets 12 are provided on the front and rear side walls of the transverse through groove 14; a pair of longitudinal conveying roller sets A13 are respectively provided at the left and right ends of the transverse through groove 14.

[0037] In this embodiment, the structure of the first unidirectional conveying module is similar to that of the bidirectional conveying module, except that it lacks the transverse conveying roller group. Specifically, it includes a conveying base B, and the upper end of the conveying base B is provided with a pair of longitudinal conveying roller groups B distributed on the left and right.

[0038] In this embodiment, the lifting mechanism includes a groove-shaped lifting frame 15, which is driven to move vertically by a cam assembly located below it; a pair of longitudinal conveying roller groups A13 are installed on the upper left and right sides of the lifting frame 15. Furthermore, the cam assembly includes a pair of cam plates 16 distributed front and rear, the cam plates 16 being arranged laterally. The pair of cam plates 16 are driven to move laterally by a power assembly. Above the cam plates 16 are a pair of lifting rods 17 distributed left and right. The top of the lifting rods 17 is fixedly connected to the bottom of the lifting frame 15, and a roller 18 is installed at the lower end of the lifting rods 17. The left and right ends of the cam plates 16 have recessed portions 19 that are respectively recessed downwards. The right end of the recess 19 is provided with a lifting ramp 110 corresponding to the position of the lifting rod 17. The lifting ramp 110 is lower at the left end and higher at the right end. The upper section of the lifting ramp 110 is connected to an upper plane 111, and the lower end is connected to a lower plane 112. When the power assembly drives the pair of cam plates 16 to move laterally, the roller 18 rolls along the upper plane 111, the lifting ramp 110, and the lower plane 112.

[0039] In this embodiment, the upper plane 111 and the lifting ramp 110, and the lower plane 112 and the lifting ramp 110 are both transitioned by the arc surface 113.

[0040] In this embodiment, the power assembly is installed at the inner bottom of the conveying base A11. The power assembly includes a transverse cylinder 114 disposed between a pair of cam plates 16 and a pair of transverse guide rails 115 disposed parallel to the front and rear sides of the transverse cylinder 114. A longitudinal connecting rod 116 is fixed to the end of the cylinder rod of the transverse cylinder 114. The longitudinal connecting rod 116 is fixed between the pair of cam plates 16. The pair of cam plates 16 are respectively mounted on the sliders of the pair of transverse guide rails 115. During operation, the transverse cylinder 114 drives the pair of cam plates 16 to move along the transverse guide rails 115 through the longitudinal connecting rod 116, thereby realizing the rolling of the roller along the upper plane, the lifting inclined plane and the lower plane, and thus realizing the lifting of the lifting frame.

[0041] When the cam assembly is in operation: Initially, a pair of transverse conveying roller sets 12 convey the injection clamp, and a pair of longitudinal conveying roller sets A13 are located below the pair of transverse conveying roller sets 12, with the roller 18 positioned at the lower plane 112. When it is necessary to change the direction of the injection clamp by 90 degrees, the longitudinal connecting rod 116 driven by the transverse cylinder 114 moves laterally to the left. The longitudinal connecting rod 116 drives a pair of cam plates 16 to move to the left along the transverse guide rail 115, at which point the roller 18 rolls from the lower plane 112 to... The roller 18 rolls upward along the lifting ramp 110, and the roller 18 drives the lifting frame 15 to move upward through the lifting rod 17, thereby realizing the vertical rise of a pair of longitudinal conveying roller sets A13. When the roller 8 rolls to the upper plane 111, the roller 18, the lifting frame 15, and the pair of longitudinal conveying roller sets 13 stop rising. The pair of longitudinal conveying roller sets A13 contact the bottom of the injection clamp, and the pair of longitudinal conveying roller sets A13 convey the injection clamp longitudinally, realizing a 90-degree reversal of conveying. When it is necessary to lower the pair of longitudinal conveying roller sets 13, the transverse cylinder 114 drives a pair of cam plates 16 to move from left to right. At this time, the roller 18 moves from the upper plane 111 to the lifting ramp 110, and moves downward along the lifting ramp 110 to the lower plane 112.

[0042] In this embodiment, the bottom of the lifting frame 15 is provided with guide holes 117 that extend vertically around its perimeter; the inner bottom of the conveying base A11 is fixed with vertical guide rods 18 corresponding to the positions of the guide holes 117, and the vertical guide rods 118 slide through the guide holes 117. By setting the vertical guide rods and guide holes, the lifting frame can be guided when it moves vertically up and down.

[0043] In this embodiment, a pair of positioning cylinders 119, arranged front to back, are fixed to the inner bottom of the conveying base A1. The positioning cylinders 119 are vertically arranged, and a second positioning pin 120 is fixed to the telescopic end of the positioning cylinder 119 for engaging with the positioning hole at the bottom of the injection clamp. When the injection clamp needs to be conveyed 90 degrees, the positioning cylinder drives the second positioning pin to extend upward and engage with the positioning hole at the bottom of the injection clamp to position the injection clamp; then a pair of longitudinal conveying rollers move upward.

[0044] In this embodiment, the transverse conveyor roller group 12 includes multiple transverse conveyor rollers evenly distributed along the transverse direction, and the multiple transverse conveyor rollers 12 are driven and linked by a servo motor through a chain mechanism; the longitudinal conveyor roller group A13 includes multiple longitudinal conveyor rollers evenly distributed along the longitudinal direction, and the multiple longitudinal conveyor rollers are also driven and linked by a separate servo motor through a chain mechanism. It should be noted that the structure of multiple conveyor rollers distributed side by side and driven and linked by a motor through a chain is prior art, similar to the driving method of existing roller conveyors, and will not be repeated here.

[0045] This bidirectional conveying module uses a pair of transverse conveying rollers to convey the liquid injection clamp laterally. When the liquid injection clamp needs to be reversed to 90 degrees, the lifting mechanism drives a pair of longitudinal conveying rollers to rise and contact the liquid injection clamp, and then conveys the liquid injection clamp longitudinally. The overall structure is simple and compact, operates smoothly and reliably, and reduces space occupation.

[0046] In this embodiment, the clamp conveyor line 103 has an opening at the middle of its rear end, and a clamp disassembly / assembly mechanism 108 is provided at the rear end opening of the clamp conveyor line, located above the liquid injection clamp. Since the liquid injection clamp is a split structure consisting of upper and lower parts, the clamp disassembly / assembly mechanism is used to assemble or disassemble the liquid injection clamp; a clamp assembly station 109 connected to the battery feeding mechanism 101 is provided between the clamp disassembly / assembly mechanism 108 and the liquid injection station 105; a clamp disassembly station 121 connected to the battery unloading machine 102 is provided on the right side of the clamp disassembly / assembly mechanism 108. Figure 20-23As shown, the fixture disassembly and assembly machine 108 includes a movable seat 142 driven by a transverse moving mechanism 141 to move between the fixture assembly station 109 and the fixture disassembly station 121. A lifting cylinder 143 is installed in the middle of the bottom surface of the movable seat 142. The cylinder rod of the lifting cylinder 143 extends downward and is equipped with a disassembly and assembly lifting seat 144. The structure of the disassembly and assembly lifting seat is the same as that of the sealing plate 033. The top surface of the disassembly and assembly lifting seat 144 is provided with a second pneumatic clamping clamp 145 corresponding to the position of the connecting plate. The actuating end of the second pneumatic clamping clamp 145 is used to pass through the connecting hole and clamp upward (the connection structure here is the same as the connection structure of the first pneumatic clamping clamp and the connecting plate), so as to connect the disassembly and assembly lifting seat with the sealing plate. During operation, the battery feeding mechanism places the battery to be injected into the lower half (lower sealing cavity) of the injection fixture and transports it to the fixture assembly station. The lifting cylinder 143 of the fixture disassembly and assembly mechanism 108 drives the disassembly and assembly lifting seat 144 to move downward and connect with the top surface of the mating seat plate 03. The actuating end of the second pneumatic clamping clamp 145 locks the connecting plate on the top surface of the mating seat plate. Then, the disassembly and assembly lifting seat 144 drives the upper part of the injection fixture (including the mating seat plate and the upper sealing cavity) to move upward. Then, the lateral movement mechanism 141 drives the upper part of the injection fixture to move to the fixture assembly station 109. At the fixture assembly station 109, the upper and lower sealing cavities of the injection fixture are connected by the quick lock 019 to realize the assembly of the injection fixture. After the battery is filled with electrolyte, the clamp conveyor line 103 transports the filling clamp to the clamp disassembly station 121. The lateral movement mechanism 141 drives the disassembly lifting plate 144 to move to the clamp disassembly station 121. The lifting cylinder 143 drives the disassembly lifting seat 144 to move downward and connect with the top surface of the mating seat plate 03. The second pneumatic clamping clamp 145 engages with the connecting plate on the top surface of the mating seat plate 03. Then, the quick lock of the filling clamp is released, so that the upper and lower sealing cavities of the filling clamp are in a state that can be separated. After that, the disassembly lifting seat drives the upper part of the filling clamp (including the mating seat plate and the upper sealing cavity) to move upward, realizing the separation of the filling clamp. The battery unloading mechanism outputs the battery after electrolyte filling from the lower sealing cavity of the filling clamp.

[0047] In this embodiment, the disassembly and assembly lifting seat 144 is connected to a negative pressure suction pipe 146. When the disassembly and assembly lifting seat 144 is vertically aligned with the mating seat plate 03, the negative pressure suction pipe 146 is connected to the liquid injection cup through the liquid injection hole to apply negative pressure to the liquid injection cup and prevent residual liquid from dripping onto the battery when the liquid injection clamp is separated.

[0048] In this embodiment, the fixture assembly station 109 and the fixture disassembly station 121 are respectively provided with a second unidirectional conveying module 122 and a third unidirectional conveying module 123 for longitudinally conveying the liquid injection fixture. The structures of the second and third unidirectional conveying modules are the same as those of the first unidirectional conveying module. The second unidirectional conveying module 122 is connected to the bidirectional conveying module 104 at the fixture assembly station 109. Before operation, the lower sealing cavity of the liquid injection fixture is placed in the second unidirectional conveying module 1022. After the battery loading mechanism 101 loads the battery to be injected into the lower sealing cavity of the liquid injection fixture, the second unidirectional conveying module 122 will convey the liquid injection fixture longitudinally forward to the bidirectional conveying module 104 at the fixture assembly station 109. After the liquid injection fixture is disassembled at the fixture disassembly station 121, the bidirectional conveying module 104 at the fixture disassembly station 121 conveys the lower sealing cavity of the liquid injection fixture longitudinally backward to the third unidirectional conveying module 123, and the battery unloading mechanism takes out the battery after liquid injection from the lower sealing cavity of the liquid injection fixture.

[0049] In this embodiment, the battery feeding mechanism 101 includes, from left to right, an incoming conveyor belt 124, a feeding barcode scanning and testing module 125, a feeding weighing module 126, a feeding buffer conveyor 127, and a feeding NG buffer conveyor 128. The incoming conveyor belt 124 transports the batteries to be injected from left to right. The batteries are first moved to the feeding barcode scanning and testing module 125 by the feeding robot 129. The feeding barcode scanning and testing module 125 scans the batteries and performs Hi-pot testing. After that, the feeding robot 129 moves the batteries after scanning and Hi-pot testing. The battery is weighed by the loading and weighing module 126 before being injected with electrolyte. After weighing, if the battery is qualified, the loading robot 129 moves it to the loading buffer conveying mechanism 127; if the battery is unqualified, the loading robot 129 moves it to the NG buffer conveying mechanism 128. The loading buffer conveying mechanism 127 is located to the left of the second unidirectional conveying module 122. The battery conveyed from back to front by the loading buffer conveying mechanism 127 is moved by the loading robot 130 to the lower sealed cavity of the electrolyte injection fixture on the second unidirectional conveying module 122.

[0050] In this embodiment, the battery unloading mechanism 102 includes, from left to right, a loading barcode scanning test module 131, an unloading weighing module 132, an unloading buffer conveyor mechanism 133, an unloading NG buffer conveyor mechanism 134, and an unloading pull belt 135. The battery inside the lower sealed cavity of the liquid injection fixture on the third unidirectional conveying module 123 is moved to the unloading barcode scanning test module 131 by the unloading robot 136. The unloading barcode scanning test module 131 scans the battery and performs a Hi-pot test. Afterwards, the unloading robot 136 performs the barcode scanning and Hi-pot test. The batteries are then moved to the unloading and weighing module 132, which weighs the batteries after they have been filled with electrolyte. If the batteries are qualified, the unloading robot 136 moves them to the unloading buffer conveyor 133; if the batteries are unqualified, the unloading robot 136 moves them to the NG buffer conveyor 134. The batteries output from the unloading buffer conveyor 133 are output through the discharge pull belt 135. Above the unloading buffer conveyor 133 is a battery electrolyte inlet wiping mechanism 138, which wipes the electrolyte inlet of the batteries.

[0051] The working method of this fully automatic liquid injection machine is as follows: (1) The feeding conveyor belt 124 transports the batteries to be injected from left to right. The batteries to be injected are first moved to the feeding barcode testing module 125 by the feeding robot 129. The feeding barcode testing module 125 scans the barcode and performs Hi-pot testing on the batteries. Then the feeding robot 129 moves the batteries to be injected after barcode scanning and Hi-pot testing to the feeding weighing module 126. The feeding weighing module 126 weighs the batteries to be injected before injection. After weighing, if the batteries are qualified, the feeding robot 129 moves them to the feeding buffer conveying mechanism 127. If the batteries are unqualified, the feeding robot 129 moves them to the feeding NG buffer conveying mechanism 128 for discharge. The batteries to be injected transported from back to front by the feeding buffer conveying mechanism 127 are moved to the lower sealed cavity of the injection fixture on the second unidirectional conveying module 122 by the loading robot 130, thus realizing the feeding of the batteries to be injected. (2) The second unidirectional conveying module 122 conveys the lower part of the injection fixture (i.e., the lower sealing cavity) longitudinally forward to the bidirectional conveying module at the fixture assembly station 109, so that the lower part of the injection fixture is located on the fixture conveying line; then the lifting cylinder 143 of the fixture disassembly and assembly mechanism 108 drives the disassembly and assembly lifting seat to move downward and connect with the top surface of the mating seat plate 03, and the second pneumatic clamping clamp 145 engages with the connecting plate on the top surface of the mating seat plate 03. Then the disassembly and assembly lifting seat 144 drives the upper part of the injection fixture (including the mating seat plate and the upper sealing cavity) to move upward; then the transverse moving mechanism 141 drives the upper part of the injection fixture to move to the fixture assembly station 109, and connects the upper and lower sealing cavities of the injection fixture at the fixture assembly station 109 through the quick lock 019 to realize the assembly of the injection fixture; (3) The clamp conveyor line 103 conveys the liquid injection clamp from right to left to the liquid injection station 105. The lifting plate 019 of the liquid injection mechanism 139 moves down and approaches the mating seat plate 03. The liquid injection valve is matched with the liquid injection hole, and the vacuum nozzle 030 is matched with the vacuum suction hole 7. The vacuum nozzle 030 first evacuates the liquid injection cup and the battery through the vacuum suction hole. Then the liquid injection valve opens and delivers electrolyte to the liquid injection cup. Then the electrolyte is input from the liquid injection port of the battery through the liquid injection cup to realize the liquid injection operation. (4) After the liquid injection is completed, the clamp conveyor line 103 first conveys the liquid injection clamp from back to front, and then from left to right; when the liquid injection clamp is directly opposite a certain station 106, the pair of longitudinal conveying rollers A13 of the bidirectional conveying module 104 pushes upward and contacts the bottom of the liquid injection clamp. The pair of longitudinal conveying rollers A13 conveys the liquid injection clamp longitudinally to the first unidirectional conveying module 107 at the station 105, so that the liquid injection clamp moves to the station. At this time, the liquid injection clamp is located below the sealing plate of the station mechanism. (5) The sealing plate 033 of the stationary mechanism 140 moves downward and is in contact with the mating seat plate 03. The ring-shaped sealing strip on the bottom surface of the sealing plate is embedded in the sealing groove on the top surface of the mating seat plate. Then, the actuating end of the pneumatic clamping clamp 028 on the top surface of the sealing plate passes through the connecting hole and clamps upward, so that the sealing plate 033 and the mating seat plate 03 are tightly fitted. After that, the positive pressure air pipe 027 inputs positive pressure into the sealing cavity through the positive pressure air hole, or the negative pressure air pipe 034 draws the inside of the sealing cavity into negative pressure through the negative pressure air hole, so that the battery is stationary in a positive pressure environment or a negative pressure environment. That is, a stationary station can perform positive pressure stationary or negative pressure stationary. (6) After the settling is completed, the first one-way conveying module 107 at the settling station 106 will convey the liquid injection clamp back to the clamp conveying line 103 along the longitudinal direction. Then the clamp conveying line 103 will first convey the liquid injection clamp from left to right, then from front to back, and finally from right to left to the clamp disassembly station 121. At the clamp disassembly station, negative pressure is applied to the liquid injection cup to prevent the residual pages from dripping onto the battery. (7) The lateral moving mechanism 141 drives the disassembly and assembly lifting seat 144 to move to the fixture disassembly station 121. The lifting cylinder 143 drives the disassembly and assembly lifting seat 144 to move downward and connect with the top surface of the mating seat plate 03. The second pneumatic clamping clamp 145 engages with the connecting plate on the top surface of the mating seat plate 03. Then, negative pressure is drawn on the injection cup, and the quick clamp of the injection fixture is released so that the upper and lower sealing cavities of the injection fixture are in a state that can be separated. After that, the disassembly and assembly lifting seat 144 drives the upper part of the injection fixture (including the mating seat plate and the upper sealing cavity) to move upward, thereby realizing the separation of the injection fixture. (8) The bidirectional conveying module 104 of the fixture disassembly station 121 conveys the lower part of the liquid injection fixture from front to back to the third unidirectional conveying module 123. The unloading robot 136 moves the liquid-injected battery in the lower part of the liquid injection fixture on the third unidirectional conveying module 126 to the unloading barcode testing module 131. The unloading barcode testing module 131 scans the barcode and performs Hi-pot testing on the liquid-injected battery. Then, the unloading robot 137 moves the liquid-injected battery after barcode scanning and Hi-pot testing to... The unloading and weighing module 132 weighs the batteries after they have been injected with electrolyte. If the batteries are qualified, the unloading robot 137 moves them to the unloading buffer conveyor 133. If the batteries are unqualified, the unloading robot 137 moves them to the unloading NG buffer conveyor 134. The unloading buffer conveyor 133 outputs the injected batteries from front to back through the discharge pull belt 135 from left to right. The battery injection port wiping mechanism 138 wipes the injection port of the injected batteries. (9) After the battery is filled with electrolyte, the sealing nails and glue nails are tested.

[0052] If this invention discloses or relates to mutually fixedly connected components or structural parts, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).

[0053] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0054] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A fully automatic battery filling machine, comprising a battery feeding mechanism and a battery unloading mechanism distributed on the left and right sides, characterized in that: The battery feeding mechanism and battery unloading mechanism are equipped with a clamp conveyor line for conveying the liquid injection clamps on the front side. The clamp conveyor line is composed of multiple bidirectional conveying modules spliced ​​together in a rectangular ring shape. A liquid injection station is provided at the rear left end of the clamp conveyor line. The liquid injection station is equipped with a liquid injection mechanism located above the liquid injection clamp. Several stationary stations are provided on the front and inner sides of the clamp conveyor line, arranged side by side in the transverse direction. Each stationary station is equipped with a first unidirectional conveying module for conveying the liquid injection clamps in the longitudinal direction. A stationary mechanism is provided directly above the first unidirectional conveying module. The liquid injection fixture includes a sealed cavity for encapsulating the battery. A mating seat plate is fixed above the sealed cavity. A liquid injection cup is vertically inserted through the mating seat plate. The lower end of the liquid injection cup extends into the sealed cavity and corresponds to the position of the liquid injection port of the battery. The liquid injection seat plate is pressed above the liquid injection cup. The liquid injection seat plate has a liquid injection hole and a vacuum suction hole that communicate with the liquid injection cup. The mating seat plate also has a positive pressure air hole and a negative pressure air hole, which are respectively connected to the inside of the sealed cavity through pipes. The bidirectional conveying module includes a conveying base A, with a pair of transverse conveying roller groups distributed in front and back at the upper end of the conveying base A, and a pair of longitudinal conveying roller groups A distributed in left and right between the pair of transverse conveying roller groups, and the pair of longitudinal conveying roller groups A being driven to rise and fall by a lifting mechanism; the first unidirectional conveying module includes a conveying base B, with a pair of longitudinal conveying roller groups B distributed in left and right at the upper end of the conveying base B. The top surface of the mating seat plate is provided with an annular sealing groove, and the liquid injection seat plate, positive pressure air hole and negative pressure air hole are all located inside the sealing groove; the stationary mechanism includes a liftable sealing plate, and a positive pressure air pipe and a negative pressure air pipe are connected to the sealing plate, and the positive pressure air pipe and the negative pressure air pipe correspond to the positions of the positive pressure air hole and the negative pressure air hole, respectively.

2. The fully automatic liquid injection machine according to claim 1, characterized in that: The sealing cavity includes an upper sealing cavity and a lower sealing cavity connected by a quick-locking mechanism. The top perimeter of the upper sealing cavity is connected to the bottom surface of the mating seat plate by a vertical connecting rod. The lower sealing cavity contains several relatively independent battery compartments arranged in a matrix. Each battery compartment has several battery slots along its length.

3. The fully automatic liquid injection machine according to claim 2, characterized in that: The top surface of the mating plate is fixed with a liquid injection plate at the corresponding position of each battery compartment. Each liquid injection plate has several liquid injection holes arranged side by side along its length. The positions of the several liquid injection holes correspond to the positions of several battery slots. There is a liquid injection cup between the liquid injection hole and the battery slot. There is a vacuum suction hole on the side of each liquid injection hole.

4. The fully automatic liquid injection machine according to claim 1, characterized in that: The lifting mechanism includes a lifting frame, which is driven to move vertically by a cam assembly located below it; a pair of longitudinal conveying rollers are installed at the upper end of the lifting frame; the cam assembly includes a pair of front and rear distributed cam plates, which are driven to move laterally by a power assembly; a pair of left and right distributed lifting rods are provided above the cam plates, the top of the lifting rods is fixedly connected to the bottom of the lifting frame, and rollers are installed at the lower end of the lifting rods; the left and right ends of the cam plates are respectively provided with lifting inclined surfaces corresponding to the positions of the lifting rods, and the upper and lower ends of the lifting inclined surfaces are respectively connected to an upper plane and a lower plane; the rollers roll along the upper plane, the lifting inclined surfaces, and the lower plane.

5. The fully automatic liquid injection machine according to claim 1, characterized in that: The liquid injection mechanism includes a lifting plate. The bottom surface of the lifting plate is provided with vacuum nozzles corresponding to the positions of each vacuum suction hole. The top surface of the lifting plate is provided with liquid injection mechanisms corresponding to the positions of each liquid injection hole. One liquid injection hole corresponds to one liquid injection mechanism. The liquid injection mechanism includes a constant flow pump. The inlet of the constant flow pump is connected to the electrolyte storage tank, and the outlet of the constant flow pump is connected to the liquid injection valve.

6. The fully automatic liquid injection machine according to claim 1, characterized in that: The clamp conveyor line has an opening at the middle of its rear end. A clamp disassembly / assembly mechanism is located above the liquid injection clamp at the rear opening of the clamp conveyor line. A clamp assembly station, connected to the battery loading mechanism, is located between the clamp disassembly / assembly mechanism and the liquid injection station. A clamp disassembly / assembly station, connected to the battery unloading mechanism, is located on the right side of the clamp disassembly / assembly mechanism. A pair of left- and right-distributed connecting plates are fixed to the front and rear ends of the top of the mating base plate. Connecting holes are provided on the connecting plates for engaging with the locking mechanism at the stationary position. The clamp disassembly / assembly mechanism includes a movable seat driven by a lateral moving mechanism to move between the clamp assembly station and the clamp disassembly / assembly station. A lifting cylinder is installed in the middle of the bottom surface of the movable seat. The cylinder rod of the lifting cylinder extends downwards and is equipped with a disassembly / assembly lifting seat. A pneumatic clamping clamp, corresponding to the position of the connecting plate, is provided on the top surface of the disassembly / assembly lifting seat. The actuating end of the pneumatic clamping clamp is used to pass through the connecting hole and clamp upwards.

7. The fully automatic liquid injection machine according to claim 6, characterized in that: The fixture assembly station and fixture disassembly station are respectively equipped with a second unidirectional conveying module and a third unidirectional conveying module for longitudinally conveying the liquid injection fixtures. The battery loading mechanism includes, from left to right, an incoming conveyor belt, a loading barcode testing module, a loading weighing module, a loading buffer conveyor, and a loading NG buffer conveyor. Batteries conveyed from left to right by the incoming conveyor belt are sequentially moved to the loading barcode testing module and the loading weighing module by the loading robot. The loading robot moves the batteries weighed by the loading weighing module to the loading buffer conveyor or the loading NG buffer conveyor. Batteries conveyed from back to front by the loading buffer conveyor are loaded by a loading machine. The robotic arm moves into the liquid injection fixture on the second unidirectional conveying module; the battery unloading mechanism includes, from left to right, a loading barcode scanning test module, an unloading weighing module, an unloading buffer conveying mechanism, an unloading NG buffer conveying mechanism, and an unloading pull belt. The batteries inside the liquid injection fixture on the third unidirectional conveying module are moved to the unloading barcode scanning test module by the unloading robotic arm. The batteries on the unloading barcode scanning test module are moved sequentially to the unloading weighing module, the unloading buffer conveying mechanism, or the unloading NG buffer conveying mechanism by the unloading robotic arm. The batteries output from the unloading buffer conveying mechanism from front to back are output by the unloading pull belt. A battery liquid injection port wiping mechanism is provided above the unloading buffer conveying mechanism.

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