A liquid injection device for a button steel shell battery

Abstract

The application discloses a kind of liquid injection equipment of button steel shell battery, including rack, be equipped with feed conveying line, feeding robot, feeding weighing station, feeding buffer robot, battery buffer station, battery taking manipulator, multiple battery tray transfer mechanism, multiple liquid injection mechanism, multiple battery liquid injection port deviation rectification mechanism, unloading buffer station, unloading weighing robot, unloading weighing station, unloading robot, discharge conveying line and NG conveying line;Each described battery tray transfer mechanism corresponds one described liquid injection mechanism and one battery liquid injection port deviation rectification mechanism;The application adopts camera detection mechanism to add DD motor deviation rectification mechanism to realize the deviation rectification of button steel shell battery liquid injection port, can be deviated according to the different offset of each battery, can be deviated within the circumferential range of 360 degrees.Multiple liquid injection mechanism and deviation rectification mechanism are used, carrying is completed by battery taking manipulator, can reduce liquid injection waiting time and deviation rectification waiting time, and battery liquid injection efficiency is high.

Description

Technical Field

[0001] This invention relates to equipment for manufacturing button batteries, and particularly to an electrolyte filling device for button steel-cased batteries. Background Technology

[0002] Currently, lithium-ion batteries are developing rapidly, and their production has increased significantly. To improve production efficiency, lithium battery manufacturing is becoming increasingly automated. Electrolyte injection is a crucial step in lithium battery production, involving the injection of electrolyte into the battery through injection holes to complete the process. In the injection of button cell steel-cased batteries, the position of the injection holes needs to be aligned. Therefore, the efficiency and effectiveness of the hole alignment device in the injection machine are particularly important for the entire injection process.

[0003] Currently, existing electrolyte injection hole correction devices generally use a probe and a rotary cylinder. Chinese invention patent application number 201910135412.9 describes a method where a probe is pressed against the cell surface to determine the injection hole position. When the injection hole is not in the correct position, a robotic arm grips the cell and rotates it 180 degrees using a rotary cylinder to reverse the cell's orientation. However, this correction method can only adjust the orientation of the cell between two different directions and cannot correct for individual cells with varying degrees of misalignment. For example, it cannot correct cells with an offset angle within 180 degrees or greater than 180 degrees. Furthermore, using a probe for detection can easily scratch the cell surface. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide a liquid injection device for button steel-cased batteries.

[0005] The objective of this invention is achieved through the following technical solution: a liquid injection device for button steel-cased batteries, comprising a frame, wherein the frame is equipped with a feeding conveyor line, a feeding robot, a feeding weighing station, a feeding buffer robot, a cell buffer station, a cell picking robot, multiple cell tray transfer mechanisms, multiple liquid injection mechanisms, multiple cell liquid injection port correction mechanisms, a discharging buffer station, a discharging weighing robot, a discharging weighing station, a discharging robot, a discharging conveyor line, and an NG conveyor line; each cell tray transfer mechanism corresponds to one of the liquid injection mechanisms and one cell liquid injection port correction mechanism;

[0006] The loading robot picks up multiple battery cells at once from the loading position of the feeding conveyor line and places them on the loading and weighing station. The loading and weighing station is equipped with multiple weighers, each weighing one battery cell. The loading and buffering robot picks up multiple battery cells at once from the loading and weighing station and places them on the battery cell buffering station. The battery cell buffering station is equipped with a battery cell buffer tray and a first servo conveying module for controlling the movement of the battery cell buffer tray. Each battery cell buffer tray can hold multiple battery cells. The battery cell picking robot picks up multiple battery cells at once from the battery cell buffering station and places them on the battery cell tray transfer mechanism. The battery cell tray transfer mechanism moves the battery cell tray to the position of the battery cell injection port correction mechanism to correct any misalignment of the injection port. For correction, after the electrolyte injection port on the battery cell tray is corrected, the battery cell tray transfer mechanism controls the battery cell tray to move to the position of the electrolyte injection mechanism for electrolyte injection. After the electrolyte injection is completed, the battery cell tray transfer mechanism transfers the battery cell tray to the loading position. The battery cell picking robot takes out the electrolyte-injected battery cell from the battery cell tray and transports it to the unloading buffer station. The unloading weighing robot picks up multiple battery cells at once from the unloading buffer station and places them on the unloading weighing station for weighing. The unloading weighing station is equipped with multiple weighing devices, each weighing one battery cell. The unloading robot takes out qualified battery cells from the unloading weighing station and places them on the discharge conveyor line, while defective battery cells are placed on the NG conveyor line for collection.

[0007] As an improvement to the electrolyte filling device for the button steel-cased battery of the present invention, the electrolyte filling port correction mechanism includes a correction bracket, on which a correction mounting side plate is provided. One side of the correction mounting side plate is provided with a CCD camera detection mechanism, and the other side is provided with a DD motor correction mechanism. The battery cell tray transfer mechanism moves the battery cell tray directly below the CCD camera detection mechanism. The CCD camera detection mechanism takes pictures of the positions of the electrolyte filling ports of the four battery cells and sends the position information of the battery cell electrolyte filling ports to the DD motor correction mechanism. The DD motor correction mechanism corrects the electrolyte filling port offset angle detected by the CCD camera detection mechanism.

[0008] As an improvement to the liquid injection device for the button steel-cased battery of the present invention, the CCD camera detection mechanism takes pictures in the following way;

[0009] The CCD camera detection mechanism selects two odd-numbered rows as a group or two even-numbered rows as a group for taking pictures. Each odd-numbered or even-numbered row contains two battery cells. The CCD camera detection mechanism takes pictures of two odd-numbered rows and then two even-numbered rows, and so on. The CCD camera detection mechanism can acquire images of multiple battery cells at one time by taking pictures at staggered intervals. If the pictures are not taken at staggered intervals, it is not possible to take pictures of multiple battery cells at the same time. This method of image acquisition is because the battery cells are relatively small and the spacing between the battery cells is small when they are arranged.

[0010] The correction method of the DD motor correction mechanism is as follows;

[0011] The DD motor correction mechanism selects two odd-numbered rows as a group or two even-numbered rows as a group for correction. Each odd-numbered row or even-numbered row has two battery cells. Each time the DD motor correction mechanism corrects, it selects two odd-numbered rows for correction and then selects two even-numbered rows for correction, and so on.

[0012] As an improvement to the liquid injection device for the button steel-cased battery of the present invention, the DD motor correction mechanism includes a first Z-axis servo module, a first lifting mounting plate controlled by the first Z-axis servo module, a plurality of DD motors spaced apart on the first lifting mounting plate, each of the DD motors controlling a suction cup to pick up the battery cell, and the first lifting mounting plate being slidably connected to the first Z-axis mounting plate via a slide rail and a slider.

[0013] The CCD camera detection mechanism includes a second Z-axis servo module, a second lifting mounting plate controlled by the second Z-axis servo module, a plurality of CCD cameras spaced apart on the second lifting mounting plate, and the second lifting mounting plate is slidably connected to the second Z-axis mounting plate via slide rails and sliders.

[0014] As an improvement to the liquid injection device for the button steel-cased battery of the present invention, the correction mounting side plate is provided with two positioning mechanisms on one side of the DD motor correction mechanism, and the two positioning mechanisms are respectively located on both sides of the DD motor correction mechanism.

[0015] The positioning mechanism includes a positioning cylinder mounting plate, on which a positioning cylinder is provided. The piston rod end of the positioning cylinder is provided with a positioning plate. The positioning plate is slidably connected to a fixed plate via a slide rail and a slider. One end of the fixed plate is fixed to the positioning cylinder mounting plate.

[0016] As an improvement to the liquid injection device for the button steel-cased battery of the present invention, the liquid injection mechanism includes a liquid injection bracket, on which a liquid injection cup mechanism and a lifting servo drive for controlling the lifting and lowering of the liquid injection cup mechanism are provided.

[0017] The liquid injection cup mechanism includes a liquid injection cup mounting plate, on which are provided two rows of liquid injection cups and two rows of cup lid assemblies. Both rows of cup lid assemblies are controlled to move back and forth by multiple cup lid control cylinders. During air tightness testing, the cup lid control cylinders control the cup lid assemblies to move to the position of the cup mouth and cover the cup mouth. Testing gas is injected into the liquid injection cup for air tightness testing. After the air tightness test is completed, a vacuum test is performed. After the vacuum test is completed, the cup lid control cylinders control the cup lids to open, the vacuum in the liquid injection cup is broken, and the electrolyte in the liquid injection cup flows into the battery cell under normal pressure.

[0018] The two ends of the injection cup mounting plate are connected to the two sides of the injection bracket via slide rails and sliders, respectively.

[0019] As an improvement to the liquid injection device for the button steel-cased battery of the present invention, the liquid injection bracket is further provided with a cell tray limiting mechanism. The cell tray limiting mechanism includes a limiting cylinder mounting bracket, a limiting cylinder is provided on the limiting cylinder mounting bracket, a limiting plate is provided at the piston rod end of the limiting cylinder, a connecting plate is provided on the limiting plate, and the connecting plate is connected to the limiting cylinder mounting bracket through a slide rail and a slider.

[0020] As an improvement to the liquid filling device for the button steel-cased battery of the present invention, the cup cover assembly includes a cup cover mounting plate and a cup cover abutting plate. A plurality of cup cover connecting screws are arranged at intervals on the cup cover mounting plate. Each cup cover connecting screw is provided with a spring. Each cup cover connecting screw has a cup cover at its bottom. When the cup cover is not covering the liquid filling cup, the cup cover abuts against the cup cover abutting plate. When the cup cover is moved away from the cup cover abutting plate by the control cylinder, the cup cover is pushed down by the spring and covers the mouth of the liquid filling cup.

[0021] As an improvement to the electrolyte injection device for the button steel-cased battery of the present invention, the cell tray transfer mechanism includes a transverse servo module and a transfer base plate controlled by the transverse servo module. The transfer base plate is provided with a transverse adjustment guide rail and a transverse adjustment screw. The transverse adjustment screw is connected to a fixture plate through a screw nut. The fixture plate is connected to the transverse adjustment guide rail through a slider. Rotating the transverse adjustment screw can adjust the transverse position of the fixture plate. Two rows of guide rail seats are arranged at intervals on the fixture plate. Each guide rail seat is slidably connected to a battery positioning seat. One end of each guide rail seat is provided with a screw seat. Each screw seat is provided with an adjusting screw. One end of the adjusting screw is connected to the battery positioning seat.

[0022] Two sets of through-beam sensors are provided at both ends of the fixture plate. Each battery positioning seat has a limiting tip at one end. When the limiting tip of the battery positioning seat is sensed by the through-beam sensor, it indicates that the position of the battery positioning seat is not flush with the other battery positioning seats.

[0023] Each of the battery positioning seats is provided with at least one battery positioning slot.

[0024] As an improvement to the electrolyte injection device for the button steel-cased battery of the present invention, the cell-collecting robot includes an X-axis servo module and a Z-axis servo module. The X-axis servo module controls the movement of the Z-axis servo module, and the Z-axis servo module controls the movement of a material-collecting lifting plate. The material-collecting lifting plate is provided with multiple cell-collecting suction cups spaced apart.

[0025] The beneficial effects of this invention are as follows: This invention uses a CCD camera detection mechanism combined with a DD motor correction mechanism to correct the offset of the electrolyte filling port of the button steel-cased battery. It can correct the offset according to the different offset of each cell, and can achieve correction within a 360-degree circumferential range. It can correct multiple cells simultaneously, with high correction efficiency and high precision. Moreover, this invention can achieve fully automated loading and unloading. It uses multiple electrolyte filling mechanisms and multiple correction mechanisms, and the cell handling is completed by a robotic arm, which can reduce the waiting time for electrolyte filling and correction, and greatly improve the efficiency of electrolyte filling of the cells. Attached Figure Description

[0026] Figure 1 This is a top view of the present invention;

[0027] Figure 2 This is a perspective view of the battery cell injection port correction mechanism of the present invention;

[0028] Figure 3 This is a side view of the battery cell injection port correction mechanism of the present invention;

[0029] Figure 4 This is a perspective view of the liquid injection mechanism of the present invention;

[0030] Figure 5 This is a front view of the injection mechanism of the present invention;

[0031] Figure 6 This is a perspective view of the injection cup mechanism of the present invention;

[0032] Figure 7 This is a perspective view of the battery cell tray transfer mechanism of the present invention;

[0033] Figure 8 This is a top view of the battery cell tray transfer mechanism of the present invention;

[0034] Figure 9 This is a schematic diagram of the fixture plate structure of the battery cell tray transfer mechanism of the present invention;

[0035] Figure 10 This is a perspective view of the present invention after the frame has been removed. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0038] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0039] like Figures 1-10 As shown, a liquid injection device for button steel-cased batteries includes a frame 1, on which are mounted a feeding conveyor line 2, a loading robot 3, a loading and weighing station 4, a loading buffer robot 5, a cell buffer station 6, a cell picking robot 7, multiple cell tray transfer mechanisms 8, multiple liquid injection mechanisms 9, multiple cell liquid injection port correction mechanisms 10, a discharge buffer station 11, a discharge weighing robot 12, a discharge weighing station 13, a discharge robot 14, a discharge conveyor line 15, and an NG conveyor line 16; each cell tray transfer mechanism 8 corresponds to one liquid injection mechanism 9 and one cell liquid injection port correction mechanism 10;

[0040] The loading robot 3 picks up multiple battery cells at once from the loading position of the feeding conveyor line 2 and places them on the loading and weighing station 4. The loading and weighing station 4 is equipped with four weighing devices, each weighing one battery cell. The loading and buffering robot 5 picks up four battery cells at once from the loading and weighing station 4 and places them on the battery cell buffering station 6. The battery cell buffering station 6 is equipped with a battery cell buffering tray and a first servo conveying module for controlling the movement of the battery cell buffering tray. The first servo conveying module includes a module profile, on which a servo motor and a transmission screw are mounted. The servo motor is connected to the transmission screw through a coupling, and the transmission screw is connected to the battery cell buffering tray through a screw nut. Each battery cell buffering tray can hold multiple battery cells, which are placed in two rows with spacing. The battery cell picking robot 7 picks up four battery cells at once from the battery cell buffering station 6 and places them on the battery cell tray transfer mechanism 8. After the battery cell tray is full, the battery cell tray transfer mechanism 8 controls the electric... The cell tray moves, and the cell tray transfer mechanism 8 moves the cell tray to the position of the cell injection port correction mechanism 10 to correct the misalignment of the cell injection port. After the cell injection port on the cell tray is corrected, the cell tray transfer mechanism 8 controls the cell tray to move to the position of the injection mechanism 9 for injection. After the cell injection 9 is completed, the cell tray transfer mechanism 8 transfers the cell tray to the loading position. The cell picking robot 7 takes the injected cells from the cell tray and transports them to the unloading buffer station 11. The unloading weighing robot 12 picks up multiple cells at once from the unloading weighing station 11 and places the cells in the unloading weighing station 13 for weighing. The unloading weighing station 13 is equipped with 4 weighing devices, each weighing one cell. The unloading robot 14 takes up qualified cells from the unloading weighing station 13 and places them in the discharge conveyor line 15. Defective cells are placed in the NG conveyor line 16 for collection.

[0041] Preferably, the cell injection port correction mechanism 10 includes a correction bracket 101, on which a correction mounting side plate 102 is provided. One side of the correction mounting side plate 102 is provided with a CCD camera detection mechanism 103, and the other side is provided with a DD motor correction mechanism 104. The cell tray transfer mechanism 8 moves the cell tray to directly below the CCD camera detection mechanism 103. The CCD camera detection mechanism 103 takes pictures of the injection port positions of the four cells and sends the cell injection port position information to the DD motor correction mechanism 104. The DD motor correction mechanism 104 corrects the cell injection port offset angle detected by the CCD camera detection mechanism 103.

[0042] Preferably, the CCD camera inspection mechanism 103 takes pictures in the following manner;

[0043] The CCD camera inspection mechanism 103 selects two rows of odd-numbered rows as a group or two rows of even-numbered rows as a group for taking pictures. Each row of odd-numbered rows or even-numbered rows contains two battery cells. The CCD camera inspection mechanism 103 takes pictures of two rows of odd-numbered rows and then takes pictures of two rows of even-numbered rows, and so on. The CCD camera inspection mechanism 103 can acquire images of multiple battery cells at one time by taking pictures at staggered intervals. If the pictures are not taken at staggered intervals, it is not possible to take pictures of multiple battery cells at the same time. This method of image acquisition is because the battery cells are relatively small and the spacing between the battery cells is small when they are arranged.

[0044] The correction method of the DD motor correction mechanism 104 is as follows;

[0045] The DD motor correction mechanism 104 selects two odd-numbered rows as a group or two even-numbered rows as a group for correction. Each odd-numbered row or even-numbered row has two cells. Each time the DD motor correction mechanism 104 corrects, it selects two odd-numbered rows for correction and then selects two even-numbered rows for correction, and so on.

[0046] Preferably, the DD motor correction mechanism 104 includes a first Z-axis servo module 1041, a first lifting mounting plate 1042 controlled by the first Z-axis servo module 1041, a plurality of DD motors 1043 spaced apart on the first lifting mounting plate 1042, each DD motor 1043 controlling a suction cup 1044 to pick up the battery cell, and the first lifting mounting plate 1042 is slidably connected to the first Z-axis mounting plate 1041 through a slide rail and a slider.

[0047] The CCD camera detection mechanism 103 includes a second Z-axis servo module 1031 and a second lifting mounting plate 1032 controlled by the second Z-axis servo module 1031. Multiple CCD cameras 1033 are spaced apart on the second lifting mounting plate 1032. The second lifting mounting plate 1032 is slidably connected to the second Z-axis mounting plate 1031 via slide rails and sliders.

[0048] Preferably, the side plate 102 for correcting the alignment is located on one side of the DD motor correction mechanism 104 and is further provided with two positioning mechanisms 105, which are located on both sides of the DD motor correction mechanism 104.

[0049] The positioning mechanism 105 includes a positioning cylinder mounting plate 1051, a positioning cylinder 1052 is provided on the positioning cylinder mounting plate 1051, a positioning plate 1053 is provided at the piston rod end of the positioning cylinder 1052, the positioning plate 1053 is slidably connected to the fixed plate 1054 through a slide rail and a slider, and one end of the fixed plate 1054 is fixed to the positioning cylinder mounting plate 1051.

[0050] Preferably, the liquid injection mechanism 9 includes a liquid injection bracket 91, on which a liquid injection cup mechanism 92 and a lifting servo drive 93 for controlling the lifting and lowering of the liquid injection cup mechanism 92 are provided; it also includes a liquid injection buffer cup, which is controlled by a lifting cylinder. The liquid injection buffer cup is mounted on a lifting plate, and the number of liquid injection buffer cups is the same as the number of liquid injection cups. The liquid injection buffer cups are connected to the electrolyte tank 17 through pipes.

[0051] The liquid injection cup mechanism 92 includes a liquid injection cup mounting plate 921, on which two rows of liquid injection cups 922 and two rows of cup cover assemblies 923 are provided. Both rows of cup cover assemblies 923 are controlled to move back and forth by multiple cup cover control cylinders 924. During air tightness testing, the cup cover control cylinders 924 control the cup cover assemblies 923 to move to the position of the cup mouth and cover the cup mouth. Test gas is injected into the liquid injection cup 922 for air tightness testing. After the air tightness test is completed, a vacuum test is performed. After the vacuum test is completed, the cup cover control cylinders 924 control the cup cover to open, the liquid injection cup 922 breaks the vacuum, and the electrolyte in the liquid injection cup 922 flows into the battery cell under normal pressure.

[0052] The two ends of the injection cup mounting plate 924 are connected to the two sides of the injection bracket 91 via slide rails and sliders, respectively.

[0053] Preferably, the liquid injection bracket 91 is further provided with a cell tray limiting mechanism 94. The cell tray limiting mechanism 94 includes a limiting cylinder mounting bracket 941, a limiting cylinder 942 is provided on the limiting cylinder mounting bracket 941, a limiting plate 943 is provided on the piston rod end of the limiting cylinder 942, and a connecting plate 944 is provided on the limiting plate 943. The connecting plate 944 is connected to the limiting cylinder mounting bracket 941 through a slide rail and a slider.

[0054] Preferably, the cup lid assembly 923 includes a cup lid mounting plate 9231 and a cup lid abutting plate 9232. The cup lid mounting plate 9231 is provided with a plurality of cup lid connecting screws 9233 arranged at intervals. Each cup lid connecting screw 9233 is provided with a spring 9235. Each cup lid connecting screw 9233 has a cup lid 9234 at its bottom. When the cup lid 9234 is not covering the liquid filling cup 922, the cup lid 9234 abuts against the cup lid abutting plate 9232. When the cup lid is moved away from the cup lid abutting plate 9232 by the control cylinder, the cup lid 9234 is pushed down by the spring 9235 and covers the mouth of the liquid filling cup 922.

[0055] Preferably, the battery cell tray transfer mechanism 8 includes a transverse servo module 81 and a transfer base plate 82 controlled by the transverse servo module. The transfer base plate 82 is provided with a transverse adjustment guide rail 83 and a transverse adjustment screw 84. The transverse adjustment screw 84 is connected to the fixture plate 85 through a screw nut. The fixture plate 85 is connected to the transverse adjustment guide rail 83 through a slider. Rotating the transverse adjustment screw 84 can adjust the transverse position of the fixture plate 85. Two rows of guide rail seats 86 are arranged at intervals on the fixture plate 85. Each guide rail seat 86 is slidably connected to a battery positioning seat 87. Each guide rail seat 86 is provided with a screw seat 88 at one end. Each screw seat 88 is provided with an adjusting screw 89. One end of the adjusting screw 89 is connected to the battery positioning seat 87.

[0056] Two sets of through-beam sensors 80 are provided at both ends of the fixture plate 85. Each battery positioning seat 87 has a limiting tip 801 at one end. When the limiting tip 801 of the battery positioning seat 87 is sensed by the through-beam sensor 80, it indicates that the position of the battery positioning seat 87 is not flush with other battery positioning seats 87.

[0057] Each battery positioning seat 87 is provided with at least one battery positioning slot 802.

[0058] Preferably, the battery cell harvesting robot 7 includes an X-axis servo module (not shown) and a Z-axis servo module (not shown). The X-axis servo module controls the movement of the Z-axis servo module, which in turn controls the movement of a material-harvesting lifting plate. Four battery cell suction cups (not shown) are spaced apart on the material-harvesting lifting plate. Both the X-axis and Z-axis servo modules include module profiles, on which servo motors and lead screws are mounted. The servo motors are connected to the lead screws via couplings. The lead screws on the X-axis servo module are connected to the Z-axis servo module via lead screw nuts, and the lead screws on the Z-axis servo module are connected to the material-harvesting lifting plate via lead screw nuts.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and structure of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid injection apparatus for a coin-type steel can battery, comprising a frame, characterized in that, The rack is provided with a feeding conveying line, a feeding robot, a feeding and weighing station, a feeding buffer robot, an electric core buffer station, an electric core taking manipulator, a plurality of electric core tray transfer mechanisms, a plurality of liquid injection mechanisms, a plurality of electric core liquid injection port deviation correction mechanisms, a discharging buffer station, a discharging and weighing robot, a discharging and weighing station, a discharging robot, a discharging conveying line and an NG conveying line; each electric core tray transfer mechanism corresponds to one liquid injection mechanism and one electric core liquid injection port deviation correction mechanism; The feeding robot takes a plurality of electric cores from the feeding position of the feeding conveying line at one time and places them on the feeding and weighing station, the feeding and weighing station is provided with a plurality of weighters, each weighter weighs one electric core, the feeding buffer robot takes a plurality of electric cores from the feeding and weighing station at one time and places them on the electric core buffer station, the electric core buffer station is provided with an electric core buffer tray and a first servo conveying module for controlling the movement of the electric core buffer tray, each electric core buffer tray can store a plurality of electric cores, the electric core taking manipulator takes a plurality of electric cores from the electric core buffer station at one time and places them on the electric core tray transfer mechanism, the electric core tray transfer mechanism moves the electric core tray to the position of the electric core liquid injection port deviation correction mechanism to correct the deviation of the electric core liquid injection port, the electric core liquid injection port of the electric core on the electric core tray is corrected, and then the electric core tray is moved to the position of the liquid injection mechanism by the electric core tray transfer mechanism for liquid injection, after the liquid injection of the electric core is completed, the electric core tray is moved to the feeding position by the electric core tray transfer mechanism, the electric core taking manipulator takes the liquid-injected electric core from the electric core tray and carries it to the discharging buffer station, the discharging and weighing robot takes a plurality of electric cores from the discharging buffer station at one time and places them on the discharging and weighing station for weighing, the discharging and weighing station is provided with a plurality of weighters, each weighter weighs one electric core, the discharging robot takes the qualified product electric core from the discharging and weighing station and places it on the discharging conveying line, and the unqualified product electric core is placed on the NG conveying line for collection; The electric core liquid injection port deviation correction mechanism comprises a deviation correction bracket, the deviation correction bracket is provided with a deviation correction mounting side plate, one side of the deviation correction mounting side plate is provided with a CCD camera detection mechanism, and the other side is provided with a DD motor deviation correction mechanism, the electric core tray transfer mechanism moves the electric core tray to the position directly below the CCD camera detection mechanism, the CCD camera detection mechanism detects the positions of the liquid injection ports of the four electric cores by photographing, and sends the position information of the electric core liquid injection port to the DD motor deviation correction mechanism, and the DD motor deviation correction mechanism corrects the deviation of the electric core liquid injection port according to the deviation angle detected by the CCD camera detection mechanism.

2. The liquid injecting apparatus of the button-type steel shell battery according to claim 1, wherein The photographing mode of the CCD camera detection mechanism is as follows: The CCD camera detection mechanism selects two odd rows as a group or two even rows as a group for photographing, each odd row or even row has two electric cores, the CCD camera detection mechanism selects two odd rows for photographing and then selects two even rows for photographing each time, and so on. The deviation correction mode of the DD motor deviation correction mechanism is as follows: The DD motor deviation correction mechanism selects two odd rows or two even rows as a group for deviation correction, and each odd row or even row has two battery cells. The DD motor deviation correction mechanism selects two odd rows for deviation correction and then selects two even rows for deviation correction, and so on.

3. The liquid injecting apparatus of the button-type steel shell battery according to claim 1, wherein The DD motor deviation correction mechanism includes a first Z-axis servo module, a first lifting mounting plate controlled by the first Z-axis servo module to lift, a plurality of DD motors arranged at intervals on the first lifting mounting plate, each of the DD motors controlling a suction cup to suck a battery cell, and the first lifting mounting plate being slidably connected to a first Z-axis mounting plate through a sliding rail and a sliding block. The CCD camera detection mechanism includes a second Z-axis servo module, a second lifting mounting plate controlled by the second Z-axis servo module to lift, a plurality of CCD cameras arranged at intervals on the second lifting mounting plate, and the second lifting mounting plate being slidably connected to a second Z-axis mounting plate through a sliding rail and a sliding block.

4. The liquid injecting apparatus of the button steel shell battery according to claim 1, wherein The deviation correction mounting side plate on one side of the DD motor deviation correction mechanism is further provided with two positioning mechanisms, and the two positioning mechanisms are respectively located on the two sides of the DD motor deviation correction mechanism. The positioning mechanism includes a positioning cylinder mounting plate, a positioning cylinder arranged on the positioning cylinder mounting plate, a positioning plate arranged at the end of the piston rod of the positioning cylinder, and the positioning plate being slidably connected to a fixed plate through a sliding rail and a sliding block, and one end of the fixed plate being fixed to the positioning cylinder mounting plate.

5. The liquid injecting apparatus of the button-type steel shell battery according to claim 1, wherein The liquid injection mechanism includes a liquid injection support, a liquid injection cup mechanism arranged on the liquid injection support, and a lifting servo drive for controlling the lifting of the liquid injection cup mechanism. The liquid injection cup mechanism includes a liquid injection cup mounting plate, two rows of liquid injection cups and two rows of cup cover assemblies arranged on the liquid injection cup mounting plate, and the two rows of cup cover assemblies being controlled to move forward and backward by a plurality of cup cover control cylinders. During the gas tightness detection, the cup cover control cylinders control the cup cover assemblies to move to the position of the cup mouth and cover the cup mouth, and the detection gas is injected into the liquid injection cup for gas tightness detection. After the gas tightness detection is completed, vacuum detection is performed, and after the vacuum detection is completed, the cup cover control cylinders control the cup cover to open, the liquid injection cup breaks the vacuum, and the electrolyte in the liquid injection cup flows into the battery cell under normal pressure. Both ends of the liquid injection cup mounting plate are connected to the two sides of the liquid injection support through a sliding rail and a sliding block.

6. The liquid injecting apparatus of the button steel shell battery according to claim 5, wherein The liquid injection support is further provided with a battery cell tray limiting mechanism, the battery cell tray limiting mechanism includes a limiting cylinder mounting support, a limiting cylinder arranged on the limiting cylinder mounting support, a limiting plate arranged at the end of the piston rod of the limiting cylinder, a connecting plate arranged on the limiting plate, and the connecting plate being connected to the limiting cylinder mounting support through a sliding rail and a sliding block.

7. The liquid injecting apparatus of the button steel shell battery according to claim 5, wherein The cup cover assembly comprises a cup cover mounting plate and a cup cover abutting plate, a plurality of cup cover connecting screws are arranged on the cup cover mounting plate at intervals, a spring is arranged on each cup cover connecting screw, and a cup cover is arranged at the bottom of each cup cover connecting screw.

8. The liquid injecting apparatus of the button steel shell battery according to claim 1, wherein, The cell tray transfer mechanism comprises a horizontal transfer servo module and a transfer base plate controlled to move by the horizontal transfer servo module, the transfer base plate is provided with a horizontal adjustment guide rail and a horizontal adjustment screw, the horizontal adjustment screw is connected to a jig plate through a screw nut, the jig plate is connected to the horizontal adjustment guide rail through a sliding block, the horizontal position of the jig plate can be adjusted by rotating the horizontal adjustment screw, two rows of guide rail seats are arranged on the jig plate at intervals, one battery positioning seat is slidably connected to each guide rail seat, a screw seat is arranged at one end of each guide rail seat, and an adjusting screw is arranged in each screw seat, one end of the adjusting screw is connected to the battery positioning seat. Two groups of opposite sensors are arranged at the two ends of the jig plate, and a limiting tip is arranged at one end of each battery positioning seat. At least one battery positioning groove is arranged on each battery positioning seat.

9. The liquid injecting apparatus of the button steel shell battery according to claim 1, wherein, The cell taking manipulator comprises an X-axis servo module and a Z-axis servo module, the X-axis servo module controls the movement of the Z-axis servo module, the Z-axis servo module controls the movement of a taking lifting plate, and a plurality of cell taking suction cups are arranged on the taking lifting plate at intervals.

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