Battery cell liquid injection production line

Abstract

The utility model relates to the technical field of lithium battery production, in particular to a battery cell liquid injection production line, which comprises a battery cell feeding detection device, a liquid injection device, a liquid injection device and a liquid injection device, the flaring mechanism is used for flaring the battery cell; the liquid injection mechanism is used for injecting liquid into the battery cell; the vacuum packaging device is used for carrying out vacuumizing treatment and packaging treatment on the battery cell after liquid injection; the primary battery cell liquid injection weighing device is used for detecting the weight of the battery cell before liquid injection; the secondary battery cell liquid injection weighing device is used for detecting the weight of the battery cell after liquid injection; the battery cell tray loading and unloading device is used for carrying out tray loading and unloading treatment on the packaged battery cells; and the conveying device is used for sequentially conveying the battery cells from the battery cell feeding and detecting device to the primary battery cell liquid injection and weighing device, the flaring mechanism, the liquid injection mechanism, the vacuum packaging device, the secondary battery cell liquid injection and weighing device and the battery cell tray loading and discharging device. The liquid injection production line has the effect of improving the automation degree and the production efficiency of the liquid injection production line.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lithium battery production, especially to a battery cell liquid injection production line. BACKGROUND

[0002] Lithium battery is a kind of chemical battery, specifically, it is the battery using non-aqueous electrolyte solution with lithium metal or lithium alloy as negative electrode material, lithium battery electrolyte in which is the carrier of ion transmission in battery, electrolyte plays the role of conducting electron between lithium battery positive and negative, is the guarantee that lithium ion battery obtains high voltage, high specific energy etc., and lithium battery liquid injection process is the key technology in lithium battery manufacturing process, and the quality and service life of lithium battery are directly affected by the good and bad of liquid injection process;

[0003] In the prior art, the battery cell liquid injection production line usually includes flaring, liquid injection, vacuum packaging and other processes, and most of the processes in the battery cell liquid injection production line on the market need to be carried out independently, and manual intervention is required between each process, which requires higher operation of the operator, resulting in instability and low automation, and the quality of lithium battery products cannot be ensured, and the production efficiency is low, how to involve a full-automatic battery cell liquid injection production line, which integrates each process automatically to improve the production efficiency of lithium battery, so that the technical problem urgently needed to be solved by enterprise R&D personnel. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the present application provides a battery cell liquid injection production line.

[0005] The above utility model object of the present application is realized by the following technical scheme:

[0006] The battery cell loading detection device loads and removes unqualified battery cells;

[0007] The flaring mechanism is used for flaring the battery cell;

[0008] The liquid injection mechanism is used for liquid injection in the battery cell;

[0009] The vacuum packaging device performs vacuum treatment and packaging treatment on the battery cell after liquid injection;

[0010] The first battery cell liquid injection weighing device detects the weight of the battery cell before liquid injection;

[0011] The second battery cell liquid injection weighing device detects the weight of the battery cell after liquid injection;

[0012] The battery cell tray loading and discharging device performs tray loading and discharging treatment on the packaged battery cell;

[0013] A conveying device is arranged to sequentially convey the battery cell from the battery cell feeding detection device to the first battery cell liquid injection and weighing device, the flaring mechanism, the liquid injection mechanism, the vacuum packaging device, the second battery cell liquid injection and weighing device, and the battery cell tray loading and discharging device.

[0014] By using the above technical solution, under the action of the battery cell feeding detection device, the battery cell can be detected and unqualified battery cells can be removed while feeding the battery cell, thereby improving the production quality of the lithium battery. Then, the first battery cell liquid injection and weighing device is used to weigh the battery cell before liquid injection. Then, the flaring mechanism is used to flare the battery cell. Then, the liquid injection mechanism is used to inject liquid into the flared battery cell. Then, the vacuum packaging device is used to perform vacuum treatment and packaging treatment on the battery cell after liquid injection. Under the vacuum condition, the gas and impurities inside the battery cell are effectively removed. Then, the second battery cell liquid injection and weighing device is used to weigh the battery cell after liquid injection, so as to timely check the liquid injection quality. Finally, the battery cell tray loading and discharging device is used to perform the automatic tray loading and discharging processes, thereby completing the production of the lithium battery. By arranging the conveying device, the battery cell feeding detection, first weighing, flaring, liquid injection, vacuum packaging, and second weighing processes can be integrated to form a seamless battery cell liquid injection production line, thereby improving the automation degree and production efficiency of the liquid injection production line, reducing the dependence on manual work, and ensuring the quality and consistency of the lithium battery product.

[0015] In a preferred example, the battery cell feeding detection device can further include a feeding conveying belt, and the feeding conveying belt is provided with a plurality of work area regions for placing the battery cells along a conveying direction.

[0016] A detection device is arranged on the feeding side of the feeding conveying belt and is used to detect the battery cells on each work area region one by one and record the information of the work area region where the unqualified battery cell is located.

[0017] An unqualified battery cell collection mechanism is controlled connected to the detection device and is used to transfer the unqualified battery cell out of the feeding conveying belt.

[0018] A battery cell supplement mechanism is controlled connected to the detection device. After the unqualified battery cell collection mechanism transfers the unqualified battery cell out of the feeding conveying belt, the battery cell supplement mechanism is used to continuously transfer the previously qualified battery cell to the work area region where the unqualified battery cell is located.

[0019] By adopting the above technical scheme, during work, the feeding conveying belt continuously moves to drive the battery cell on each work area from the feeding side to the discharging side, during which the detection equipment records the detection result of each battery cell and marks the information of the unqualified battery cell and the work area where the unqualified battery cell is located, then the defective collection mechanism removes the unqualified battery cell from the feeding conveying belt according to the work area information marked by the detection equipment, and then the battery cell supplement mechanism transfers the battery cell that has been previously detected to be qualified on the feeding conveying belt to the vacant work area due to the removal of the unqualified battery cell, so as to ensure that the work area on the subsequent feeding conveying belt always has a qualified battery cell, and the vacant work area due to the transfer of the battery cell by the battery cell supplement mechanism can continuously return to the feeding side of the feeding conveying belt under the conveying action of the feeding conveying belt to wait for feeding, so that the same number of qualified battery cells can be output to the primary battery cell liquid injection and weighing device at all times, so that the feeding process is more smooth, the production efficiency and production quality of the lithium battery are improved, and manual intervention is not required during work, and the degree of automation is high.

[0020] In a preferred example, the defective collection mechanism includes a defective collection box, a first grabbing assembly and a first double-shaft moving device. The defective collection box is open at the top and is arranged on one side of the feeding conveying belt. The first grabbing assembly is connected to the first double-shaft moving device and is used to grab the unqualified battery cell on the feeding conveying belt. The first double-shaft moving device is used to drive the first grabbing assembly to move horizontally and vertically. The battery cell supplement mechanism includes a second grabbing assembly and a second double-shaft moving device. The second grabbing assembly is connected to the second double-shaft moving device and is used to grab the qualified battery cell on the feeding conveying belt. The second double-shaft moving device is used to drive the second grabbing assembly to move horizontally and vertically.

[0021] By adopting the above technical scheme, when an unqualified battery cell is detected, the first double-shaft moving device is started and drives the first grabbing assembly to move until the first grabbing assembly takes the corresponding battery cell, and then moves to above the defective collection box to drop it into the defective collection box, thereby completing the collection of the unqualified battery cell. After the defective collection mechanism removes the unqualified battery cell, the second double-shaft moving device is started and drives the second grabbing assembly to move to the qualified battery cell in sequence before the unqualified battery cell according to the record of the detection equipment, grabs the qualified battery cell and moves it to the vacant work area that needs to be supplemented, and then resets, so as to complete the supplement of the qualified battery cell.

[0022] In a preferred example, the primary battery cell liquid injection and weighing device and the secondary battery cell liquid injection and weighing device each include a weighing workbench. A plurality of weighing sensors are arranged on the weighing workbench. Each weighing sensor is provided with a weighing seat for placing a battery cell. The weighing sensor is used to detect the weight of the battery cell in the weighing seat.

[0023] By adopting the above technical scheme, when the conveying device conveys the battery cell to the weighing seat, the weighing sensor can immediately detect the weight of the battery cell and feed back the data, thereby facilitating the subsequent liquid injection process or tray loading process.

[0024] In a preferred example, the application can be further configured as follows: the flaring mechanism comprises a first pre-flaring assembly, a flaring base, and a flaring piece, the first pre-flaring assembly is used for pre-flaring the battery bag of the battery cell, the flaring piece is vertically slidingly arranged in the flaring base, the size of the flaring piece gradually increases from bottom to top, and the flaring base is vertically fixedly installed with a second electric cylinder, the second electric cylinder is used for driving the flaring piece to vertically slide.

[0025] The liquid injection mechanism comprises a second pre-flaring assembly, a liquid injection base, a liquid injection piece, a liquid storage tank, a first liquid pump, and a third electric cylinder, the second pre-flaring assembly is used for grabbing opposite sides of the battery bag of the battery cell to keep the opening state of the battery bag of the battery cell, the liquid injection piece is vertically slidingly arranged in the liquid injection base, the third electric cylinder is vertically installed in the liquid injection base and is used for driving the liquid injection piece to vertically move, the liquid storage tank is internally provided with electrolyte, and the liquid storage tank and the first liquid pump are both arranged on one side of the liquid injection base, one end of the first liquid pump is connected to the liquid injection piece through a liquid conveying pipe, and the other end of the first liquid pump is connected to the liquid storage tank through a liquid conveying pipe.

[0026] By adopting the above technical scheme, in the flaring mechanism, under the action of the first pre-flaring assembly, the battery bag of the battery cell can be pre-flared, which preliminarily prepares for the formal flaring operation of the flaring mechanism, plays a guiding role, and reduces the elastic resetting phenomenon of the battery bag after formal flaring, after the battery bag completes the pre-flaring process, the flaring piece vertically moves under the action of the second electric cylinder until it enters the battery bag to complete the flaring process, and since the size of the flaring piece gradually increases from bottom to top, the flaring piece can easily enter the inside of the battery bag, and the possibility of damaging the battery bag can be reduced, after flaring, the battery cell is conveyed to the liquid injection mechanism, in the liquid injection mechanism, the second pre-flaring assembly keeps the battery bag of the battery cell in an open state by grabbing opposite sides of the battery bag, thereby avoiding the opening of the battery bag from being reduced due to elastic resetting, at the same time, the liquid injection piece vertically moves under the action of the third electric cylinder until it enters the battery bag, and then the first liquid pump is started to pump the electrolyte in the liquid storage tank into the liquid injection piece through the liquid conveying pipe, so as to enter the inside of the battery bag of the battery cell, thereby completing liquid injection, and achieving an accurate and efficient liquid injection process and reducing the risk of liquid leakage.

[0027] In a preferred embodiment, this application can be further configured such that: both the first pre-expansion component and the second pre-expansion component include two opposing mounting seats and a pre-expansion drive component. The two mounting seats are horizontally slidably disposed on the flaring mechanism or the liquid injection mechanism. Each mounting seat is horizontally provided with a second suction cup. The second suction cup is connected to an external air pump. When the battery cell is located between the two mounting seats, the two second suction cups are respectively used to abut against the opposite sides of the battery cell bag. The pre-expansion drive component is used to drive the two opposing mounting seats to move towards or away from each other.

[0028] By adopting the above technical solution, when the battery cell moves to the flaring mechanism, the pre-expansion drive assembly is activated to drive the two opposing mounting seats to move towards each other, so that the second suction cups located on the two mounting seats move close to the opposite sides of the battery cell pouch until they abut. Then, with the help of an external air pump, the second suction cups generate a continuous suction force on the battery pouch. The pre-expansion drive assembly then drives the two mounting seats to move away from each other, and the battery pouch opens under the pull of the second suction cups on both sides, so as to realize the pre-expansion operation of the battery pouch by the first pre-expansion assembly. Then, the flaring mechanism completes the formal flaring of the battery pouch. When the battery cell moves to the liquid injection mechanism, the pre-expansion drive assembly is activated to drive the two opposing mounting seats to move towards each other, so that the second suction cups located on the two mounting seats move close to the opposite sides of the battery cell pouch until they abut. Then, with the help of an external air pump, the second suction cups generate a continuous suction force on the battery pouch, so that the battery cell pouch always remains in the flared state, which can avoid leakage caused by the opening shrinking due to the elastic reset of the battery pouch during the liquid injection process.

[0029] In a preferred embodiment, the present application may be further configured such that the vacuum sealing device includes a primary vacuuming mechanism and a secondary vacuuming and sealing mechanism. The primary vacuuming mechanism is used to perform preliminary vacuuming treatment on the inside of the battery cell bag and place the battery cell in a vacuum environment for static placement. The secondary vacuuming and sealing mechanism is used to perform secondary vacuuming treatment and sealing treatment on the battery cell bag after the primary vacuuming mechanism in a vacuum environment.

[0030] By adopting the above technical solution, in the primary vacuuming mechanism, the battery bag of the battery cell can undergo preliminary vacuuming to remove most of the air and impurities inside the battery bag. Simultaneously, the battery cell is placed in a vacuum environment for settling. During this settling stage, the gas inside the battery cell is further discharged, and the internal pressure gradually stabilizes, preparing for subsequent secondary vacuuming and sealing. This ensures the quality of the subsequent sealing process and improves the consistency of mass-produced battery cells. After the primary vacuuming and settling, the battery cell is transported to the secondary vacuuming and sealing mechanism. In this mechanism, the battery bag undergoes a secondary vacuuming process to ensure that the vacuum level inside the battery bag meets the standard before sealing, forming the finished battery cell. The secondary vacuuming and sealing mechanism removes excess gas and impurities from the battery cell and integrates the vacuuming and sealing processes into the same mechanism, allowing the battery cell to be sealed simultaneously in a vacuum environment. This improves the integration of processes and equipment, thereby increasing the production efficiency of lithium batteries.

[0031] In a preferred embodiment, this application can be further configured as follows: the secondary vacuum sealing mechanism includes a vertically arranged second mounting frame, a second vacuum cylinder, and a second vacuum chamber. The second vacuum cylinder is vertically mounted on the second mounting frame. The top of the second vacuum chamber is fixedly connected to the piston rod of the second vacuum cylinder. There is a closed position on the moving path of the second vacuum chamber. When the second vacuum chamber is in the closed position, and the conveying device delivers the battery cell directly below the second vacuum chamber, a closed cavity is formed between the second vacuum chamber and the conveying device. The second vacuum chamber has a second air extraction port. The second air extraction port is connected to an external air pump. The second vacuum chamber is equipped with several sealing modules corresponding to the number of battery cells. Each sealing module includes a lifting cylinder, a lifting and hot-pressing linkage assembly, and two hot-pressing sealing blocks arranged opposite each other. The lifting cylinder is vertically installed and passes through the top of the second vacuum cylinder. Both hot-pressing sealing blocks are connected to the lifting cylinder and are equipped with heating elements inside. The heating elements are used to heat the hot-pressing sealing blocks. The lifting and hot-pressing linkage assembly is connected to the lifting cylinder and drives the two hot-pressing sealing blocks to move towards or away from each other when the lifting cylinder drives the piston rod to move the two hot-pressing sealing blocks downward or upward.

[0032] By adopting the above technical solution, the piston rod driven by the second vacuum cylinder is controlled to lift and lower the second vacuum chamber, forming a closed cavity in conjunction with the conveying device. This allows the battery cells to be in a stable and controlled environment, further improving the accuracy and consistency of vacuuming. Then, an external air pump further evacuates the closed cavity through the second air intake port. After the second vacuum chamber forms a closed cavity and completes the secondary vacuuming process, the lifting cylinder drives two opposing hot-pressing sealing blocks to move downwards towards the battery cell bag on the workstation. At the same time, the lifting hot-pressing linkage component drives the two hot-pressing sealing blocks to move towards each other until they abut against the opposite sides of the battery cell bag. Then, the hot-pressing sealing blocks are heated by heating elements to complete the hot-pressing sealing operation of the battery cell bag. By setting the lifting hot-pressing linkage component, the two opposing hot-pressing sealing blocks can perform synchronous dual-axis movement, improving the sealing efficiency of the battery cell bag.

[0033] In a preferred embodiment, the present application may be further configured as follows: the lifting and hot-pressing linkage assembly includes a lifting moving frame and a connecting plate, both of which are fixedly connected to the piston rod of the lifting cylinder. The connecting plate has two symmetrical and inclined second strip-shaped sliding holes, and a second slider is slidably disposed in the second strip-shaped sliding holes. The two hot-pressing sealing blocks are respectively fixedly connected to the two second sliders and are slidably connected to the lifting moving frame.

[0034] By adopting the above technical solution, when the piston rod driven by the lifting cylinder moves downward, it will drive the lifting moving frame and the connecting plate to move downward synchronously. At this time, the connecting plate abuts against the second slider located in the second strip-shaped sliding hole. Since the second strip-shaped sliding hole is inclined, the second slider will generate horizontal displacement synchronously during the downward movement, so as to drive the hot-press sealing block fixedly connected to it to generate horizontal displacement synchronously on the lifting moving frame, thereby realizing the synchronous lifting and horizontal movement of the hot-press sealing block and improving the sealing efficiency of the battery cell.

[0035] In a preferred embodiment, this application can be further configured as follows: the battery cell loading and unloading device includes an empty tray conveyor belt, a full tray conveyor belt, a tray switching mechanism, and a battery cell stacking mechanism. The empty tray conveyor belt has a dismantling mechanism on its feed side, which is used to split the tray stack into individual trays and transfer the trays to the feed side of the empty tray conveyor belt. The empty tray conveyor belt is used to transport the trays one by one to the tray switching mechanism. The tray switching mechanism is located between the empty tray conveyor belt and the full tray conveyor belt and is used to transfer the trays from the empty tray conveyor belt to the feed side of the full tray conveyor belt. The battery cell stacking mechanism is located on the full tray conveyor belt and is used to stack finished battery cells into the trays. The full tray conveyor belt has a stacking mechanism on its discharge side, which is used to stack the stacked trays to form a tray pile. The full tray conveyor belt is used to sequentially transport the trays to the battery cell stacking mechanism and the stacking mechanism.

[0036] By adopting the above technical solution, during operation, empty material trays are stacked on the feeding side of the empty tray conveyor belt. The disassembly mechanism can disassemble the stack of empty material trays into individual material trays, which are then transported one by one to the material tray switching mechanism via the empty tray conveyor belt. The material tray switching mechanism is responsible for conveying the empty material trays from the empty tray conveyor belt to the full tray conveyor belt, and then conveying the empty trays sequentially to the cell stacking mechanism and the tray stacking mechanism via the full tray conveyor belt. During this process, the cell stacking mechanism is responsible for accurately stacking the processed cells from the conveying device into the empty trays, and the tray stacking mechanism is responsible for stacking the material trays filled with cells. After forming the material tray stack, it is conveyed to the discharge side via the full tray conveyor belt to complete the discharge. The disassembly, loading, stacking and transfer processes are integrated into one, and the processes are smooth and efficient, requiring no manual intervention, reducing human error, ensuring the neat arrangement of cells and material trays, and improving the overall production efficiency of lithium batteries.

[0037] In summary, this application includes at least one of the following beneficial technical effects:

[0038] 1. With the help of the cell loading and inspection device, the cells can be inspected and unqualified cells can be removed while the cells are being loaded, thus improving the production quality of lithium batteries. Then, a primary cell liquid injection weighing device weighs the cells before liquid injection, followed by a flaring mechanism to flare the cells, and then a liquid injection mechanism to inject the flared cells. A vacuum sealing device performs vacuuming and sealing on the injected cells, effectively removing gas and impurities under vacuum conditions. A secondary cell liquid injection weighing device weighs the sealed cells after liquid injection to verify the quality of the liquid injection. Finally, a cell tray loading and unloading device automatically loads and unloads the cells, completing the entire lithium battery production process. Furthermore, by setting up a conveying device, the various processes of cell loading and inspection, primary weighing, flaring, liquid injection, vacuum sealing, and secondary weighing can be integrated to form a seamless cell liquid injection production line. This improves the automation level and production efficiency of the liquid injection production line, reduces reliance on manual labor, and ensures the quality and consistency of lithium battery products.

[0039] 2. During cell testing, the feeding conveyor belt moves continuously to transport cells from the infeed side to the discharge side at each workstation. During this process, the testing equipment records the test results of each cell and marks the information of the unqualified cells and their respective workstations. Subsequently, the defect collection mechanism removes the unqualified cells from the feeding conveyor belt according to the workstation information marked by the testing equipment. Immediately afterwards, the cell replenishment mechanism transfers the previously qualified cells from the feeding conveyor belt to the workstations vacated due to the removal of unqualified cells, ensuring that the workstations on the subsequent feeding conveyor belt always have qualified cells. The workstations vacated after the cell replenishment mechanism transfers cells can continuously return to the infeed side of the feeding conveyor belt under the conveying action of the feeding conveyor belt to wait for feeding, thus always outputting the same number of qualified cells to the primary cell liquid filling and weighing device. This makes the feeding process smoother, improves the production efficiency and quality of lithium batteries, and requires no manual intervention during operation, resulting in a high degree of automation.

[0040] 3. By setting up a weighing stand that can vertically discharge cells, the space occupied by traditional flat weighing can be reduced. In the same area, more cells can be weighed, thereby improving weighing efficiency. Furthermore, by combining it with a vertical placement mechanism, the cells can be turned into a vertical position before the transfer mechanism picks them up, i.e. before the cells are weighed. This eliminates the need to turn them again before subsequent electrolyte injection, ensuring that the cells remain in a vertical position throughout the weighing and electrolyte injection process. This simplifies the transfer process, improves battery production efficiency, and optimizes the production line layout and process.

[0041] 4. During the flaring and electrolyte injection processes, the battery bag of the cell can be pre-flared under the action of the first pre-flaring component in the flaring mechanism. This pre-flaring prepares the battery bag for the subsequent formal flaring operation, guiding it and reducing the elastic reset phenomenon of the battery bag after formal flaring. After the battery bag completes the pre-flaring process, the flaring component moves vertically under the action of the second electric cylinder until it enters the battery bag, completing the flaring process. Furthermore, because the size of the flaring component gradually increases from bottom to top, it facilitates the entry of the flaring component into the battery bag and reduces damage. To minimize the risk of damage to the battery bag, after the flaring process is completed, the battery cell is transported to the liquid injection mechanism. In the liquid injection mechanism, the second pre-expansion component grips the opposite sides of the battery cell bag to keep the battery cell bag open, preventing the opening from shrinking due to elastic reset. At the same time, the liquid injection component moves vertically under the action of the third electric cylinder until it enters the battery bag. Then, the first liquid pump is activated to pump the electrolyte in the storage tank through the delivery pipe into the liquid injection component, thereby entering the battery cell bag and completing the liquid injection process. This ensures a precise and efficient liquid injection process and reduces the risk of leakage.

[0042] 5. During the vacuum sealing process, the battery cell pouch undergoes preliminary vacuuming in the primary vacuuming mechanism to remove most of the air and impurities. Simultaneously, the battery cell is placed in a vacuum environment for settling. During this settling phase, the internal gas is further expelled and the internal pressure gradually stabilizes, preparing for subsequent secondary vacuuming and sealing. This ensures the quality of the subsequent sealing process and improves the consistency of mass-produced battery cells. After the primary vacuuming and settling, the battery cell is transported to the secondary vacuuming and sealing mechanism. In this mechanism, the battery cell pouch undergoes a second vacuuming process to ensure the vacuum level meets the standards before sealing, forming the finished battery cell. The secondary vacuuming and sealing mechanism removes excess gas and impurities from the battery cell and integrates the vacuuming and sealing processes into a single mechanism. This allows the battery cell to be sealed simultaneously in a vacuum environment, improving the integration of processes and equipment, thereby increasing the production efficiency of lithium batteries.

[0043] 6. During the tray loading and unloading process, empty trays are stacked on the feed side of the empty tray conveyor belt. The tray dismantling mechanism can dismantle the stack of empty trays into individual trays, which are then transported one by one to the tray switching mechanism via the empty tray conveyor belt. The tray switching mechanism is responsible for transporting the empty trays from the empty tray conveyor belt to the full tray conveyor belt, and then transporting the empty trays sequentially to the cell stacking mechanism and the tray stacking mechanism via the full tray conveyor belt. During this process, the cell stacking mechanism is responsible for accurately stacking the processed cells from the conveyor device into the empty trays, and the tray stacking mechanism is responsible for stacking the trays filled with cells. After forming the tray stack, the trays are transported to the discharge side via the full tray conveyor belt to complete the discharge. The tray dismantling, tray loading, stacking, and transfer processes are integrated into one, with smooth and efficient processes. No manual intervention is required in between, reducing human error and ensuring the neat arrangement of cells and trays, thereby improving the overall production efficiency of lithium batteries. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall structure of the cell liquid injection production line in one embodiment of this application;

[0045] Figure 2 This is another overall structural schematic diagram of the cell liquid injection production line in one embodiment of this application;

[0046] Figure 3 This is a schematic diagram of the structure of a cell feeding and detection device in one embodiment of this application;

[0047] Figure 4 yes Figure 3 A magnified view of part A in the middle;

[0048] Figure 5 yes Figure 3 A magnified view of part B in the middle section;

[0049] Figure 6 This is a schematic diagram of the structure of the first alignment block and the first driving mechanism in one embodiment of this application;

[0050] Figure 7 This is a schematic diagram of the structure of the second alignment block and the second driving mechanism in one embodiment of this application;

[0051] Figure 8 This is a schematic diagram of the structure of a primary cell liquid injection weighing device in one embodiment of this application;

[0052] Figure 9 This is a schematic diagram of the assembly of the weighing stand and the battery cell in a vertical position according to one embodiment of this application;

[0053] Figure 10 This is a schematic diagram of the vertical placement mechanism in one embodiment of this application;

[0054] Figure 11 yesFigure 8 A magnified view of part C in the middle;

[0055] Figure 12 This is a schematic diagram of the flaring mechanism and the liquid injection mechanism in one embodiment of this application;

[0056] Figure 13 This is a schematic diagram of the flaring mechanism in one embodiment of this application;

[0057] Figure 14 This is another structural schematic diagram of the flaring mechanism in one embodiment of this application;

[0058] Figure 15 This is a schematic diagram of the liquid injection mechanism in one embodiment of this application;

[0059] Figure 16 This is a schematic diagram of the structure of a vacuum sealing device in one embodiment of this application;

[0060] Figure 17 This is a schematic diagram of the structure of a primary vacuuming mechanism in one embodiment of this application;

[0061] Figure 18 This is a schematic diagram of the overall structure of the secondary vacuum sealing mechanism in one embodiment of this application;

[0062] Figure 19 This is a schematic diagram of the secondary vacuum sealing mechanism after removing the second vacuum chamber in one embodiment of this application;

[0063] Figure 20 This is a schematic diagram of the sealing module in one embodiment of this application;

[0064] Figure 21 This is a schematic diagram of the overall structure of the cell loading and unloading device in one embodiment of this application;

[0065] Figure 22 This is another overall structural schematic diagram of the cell loading and unloading device in one embodiment of this application;

[0066] Figure 23 yes Figure 21 A magnified view of part D in the middle.

[0067] Reference numerals: 1. Battery cell loading and testing device; 2. Vacuum sealing device; 3. Primary battery cell liquid injection weighing device; 4. Secondary battery cell liquid injection weighing device; 5. Battery cell tray unloading device; 6. First transfer mechanism; 7. Circular track module; 8. Second transfer mechanism; 9. Flat placement mechanism; 10. Unloading conveyor belt;

[0068] A1. Feeding conveyor belt; A2. Workstation area; A21. Baffle; A22. Alignment plate; A3. Detection equipment; A4. Defect collection mechanism; A41. Defect collection box; A42. First gripping assembly; A43. First dual-axis moving device; A5. Battery cell replenishment mechanism; A51. Second gripping assembly; A52. Second dual-axis moving device; A6. Alignment mechanism; A61. First alignment block; A62. Second alignment block; A63. First drive mechanism; A64. Second drive mechanism; A7. Infrared sensor;

[0069] B2, Vertical placement mechanism; B21, Vertical lifting plate; B22, First drive assembly; B23, Vertical rotation shaft; B24, Vertical mounting plate; B25, First suction cup; B26, Second drive assembly; B261, Transmission gear; B262, Transmission rack; B3, Weighing workbench; B4, Transfer mechanism; B41, Transfer frame; B42, Dual-axis moving module; B421, Linear module; B422, Transfer mounting plate; B423, Guide rail; B43, Pneumatic finger; B5, Weighing sensor; B6, Weighing base; B61, Base plate; B62, Support plate; B63, End plate; B64, Side sealing groove; B65, Electrode groove;

[0070] C1, Working plate; C2, Flaring mechanism; C21, Flaring machine base; C22, Flaring component; C23, Second electric cylinder; C3, Liquid injection mechanism; C31, Liquid injection machine base; C32, Liquid injection component; C33, Liquid storage tank; C34, Third electric cylinder; C35, Buffer replenishment tank; C36, Collection box; C37, Moving plate; C38, Second cylinder; C5, Workstation base; C6, First pre-expansion assembly; C61, Mounting base; C62, Pre-expansion drive assembly; C63, Connector; C64, First strip sliding hole; C65, Second slider; C66, First electric cylinder; C67, Second suction cup; C7, Second pre-expansion assembly; C8, Lifting plate; C9, First cylinder;

[0071] D2, Primary vacuuming mechanism; D21, First mounting bracket; D22, First vacuuming cylinder; D23, First vacuuming chamber; D24, First air extraction port; D3, Secondary vacuuming and sealing mechanism; D31, Second mounting bracket; D32, Second vacuuming cylinder; D33, Second vacuuming chamber; D34, Second air extraction port; D35, Sealing module; D351, Lifting cylinder; D352, Lifting and hot-pressing linkage assembly; D3521, Lifting moving frame; D3522, Connecting plate; D3523, Second strip-shaped sliding hole; D3524, Second slider; D353, Hot-pressing sealing block; D6, Guide rail;

[0072] E1. Empty tray conveyor belt; E2. Full tray conveyor belt; E3. Tray switching mechanism; E31. Dual-axis moving module; E311. Linear module; E312. Transfer frame; E313. Tray switching cylinder; E32. Clamping assembly; E321. Clamping mounting plate; E322. Push clamping cylinder; E323. Third L-shaped clamping plate; E4. Cell stacking mechanism; E5. Tray removal mechanism; E51. First transverse support assembly; E511. First transverse cylinder; E512. First L-shaped clamping plate; E52. First vertical support assembly; E5 21. First vertical cylinder; E522. First vertical support plate; E53. First baffle assembly; E531. Limiting L-shaped component; E532. Limiting port; E6. Stacking mechanism; E61. Second horizontal support assembly; E611. Second horizontal cylinder; E612. Second L-shaped clamping plate; E62. Second vertical support assembly; E621. Second vertical cylinder; E622. Second vertical support plate; E63. Second baffle assembly; E631. Baffle cylinder; E632. Discharge baffle; E7. Third vertical cylinder; E8. Stacking baffle. Detailed Implementation

[0073] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of this application, including various details to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0074] It should be noted that the terms "first," "second," etc., used in this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with this disclosure.

[0075] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article, unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.

[0076] The following description, with reference to the accompanying drawings, describes a battery cell liquid injection production line of this application.

[0077] like Figure 1 and Figure 2As shown, the battery cell electrolyte injection production line includes a battery cell feeding and inspection device 1, a flaring mechanism C2, an electrolyte injection mechanism C3, a vacuum sealing device 2, a primary battery cell electrolyte injection weighing device 3, a secondary battery cell electrolyte injection weighing device 4, a battery cell tray unloading device 5, and a conveying device. The battery cell feeding and inspection device 1 feeds the battery cells and removes defective cells; the flaring mechanism C2 flares the battery cells; the electrolyte injection mechanism C3 injects electrolyte into the battery cells; and the vacuum sealing device 2 performs vacuuming and sealing treatment on the electrolyte-injected battery cells. The primary cell liquid filling and weighing device 3 detects the weight of the cell before liquid filling, the secondary cell liquid filling and weighing device 4 detects the weight of the cell after liquid filling, and the cell tray loading and unloading device 5 performs tray loading and unloading processing on the packaged cells. The conveying device sequentially conveys the cells from the cell loading and detection device 1 to the primary cell liquid filling and weighing device 3, the flaring mechanism C2, the liquid filling mechanism C3, the vacuum sealing device 2, the secondary cell liquid filling and weighing device 4, and the cell tray loading and unloading device 5. During operation, under the action of the cell loading and detection device 1, it can complete the process... While the cells are being fed into the production line, they are inspected and unqualified cells are removed to improve the production quality of lithium batteries. Then, a primary cell filling and weighing device 3 weighs the cells before filling. Next, a flaring mechanism C2 flares the cells, and a filling mechanism C3 fills the flared cells. A vacuum sealing device 2 then vacuums and seals the filled cells, effectively removing gases and impurities under vacuum conditions. A secondary cell filling and weighing device 4 weighs the sealed cells after filling to verify the filling quality. Finally, a cell traying and unloading device 5 automatically trays and unloads the cells, completing the entire lithium battery production process. By incorporating a conveyor system, the various processes—cell feeding and inspection, primary weighing, flaring, filling, vacuum sealing, and secondary weighing—can be integrated to form a seamless cell filling production line. This improves the automation and efficiency of the filling production line, reduces reliance on manual labor, and ensures the quality and consistency of lithium battery products.

[0078] In this embodiment, the conveying device includes a vertical placement mechanism B2, a first transfer mechanism 6, a circular track module 7, a second transfer mechanism 8, a horizontal placement mechanism 9, and a discharge conveyor belt 10 arranged sequentially along the conveying path. The vertical placement mechanism B2 is located on the discharge side of the battery cell loading and detection device 1 and is used to change the battery cells in the horizontal position to the vertical position. The first transfer mechanism 6 is located on the primary battery cell liquid injection weighing device 3. The first transfer mechanism 6 is used to transport the battery cells picked up by the vertical placement mechanism to the primary battery cell liquid injection weighing device 3, and to transport the battery cells after the first weighing from the primary battery cell liquid injection weighing device 3 to the circular track module 7. Several working plates C1 are slidably installed on the circular track module 7. The work plate C1 is equipped with several vertically placed workstations C5. The circular track module 7 is used to drive several work plates C1 to transport several battery cells to the flaring mechanism C2, the liquid injection mechanism C3 and the vacuum sealing device 2 in sequence. The second transfer mechanism 8 is set on the secondary battery cell liquid injection weighing device 4. The second transfer mechanism 8 is used to transport the battery cells that have been sealed by the vacuum sealing device 2 to the flat placement mechanism 9. The flat placement mechanism 9 is set on the feeding side of the unloading conveyor belt 10 and is used to place the battery cells picked up by the second transfer mechanism 8 onto the unloading conveyor belt 10. The unloading conveyor belt 10 is used to transport the battery cells to the battery cell tray unloading device 5 for tray unloading processing.

[0079] Preferably, such as Figure 3 As shown, the battery cell loading and inspection device 1 includes a loading conveyor belt A1, several workstation areas A2 for placing battery cells arranged along the conveying direction of the loading conveyor belt A1, and a testing device A3, a defective collection mechanism A4, and a battery cell replenishment mechanism A5 arranged sequentially along the conveying direction of the loading conveyor belt A1. The testing device A3 is located on the feeding side of the loading conveyor belt A1 and is used to inspect each battery cell in each workstation area A2 and record the information of the workstation area A2 where the defective battery cell is located. The defective collection mechanism A4 is controlled and connected to the testing device A3 and is used to transfer the defective battery cell out of the loading conveyor belt A1. The battery cell replenishment mechanism A5 is controlled and connected to the testing device A3. After the defective collection mechanism A4 transfers the defective battery cell out of the loading conveyor belt A1, the battery cell replenishment mechanism A5 is used to continuously transfer the previously qualified battery cell to the workstation area A2 where the defective battery cell is located.

[0080] Among them, such as Figure 3 and Figure 8As shown, the vertical placement mechanism B2 and the first transfer mechanism 6 in the above-mentioned conveying device are located between the battery cell loading and testing device 1 and the primary battery cell liquid filling and weighing device 3. The vertical placement mechanism B2 and the first transfer mechanism 6 work together to simultaneously output several consecutive workstation areas A2. During operation, the loading conveyor belt A1 moves continuously to transport the battery cells in each workstation area A2 from the feeding side to the discharging side. During this period, the testing device A3 records the testing results of each battery cell and marks the information of the unqualified battery cells and their respective workstation area A2. Subsequently, the defective collection mechanism A4 removes the unqualified battery cells from the loading conveyor belt A1 according to the workstation area A2 information marked by the testing device A3. Then, the battery cell replenishment machine... According to the information of station area A2 marked by the testing equipment A3, the mechanism A5 transfers the previously tested and qualified battery cells on the feeding conveyor belt A1 to the station area A2 that is vacant due to the removal of unqualified battery cells. This ensures that station area A2 on the subsequent feeding conveyor belt A1 always has qualified battery cells. The station area A2 vacant after the battery cell replenishment mechanism A5 transfers the battery cells can continuously return to the feeding side of the feeding conveyor belt A1 under the conveying action of the feeding conveyor belt A1 to wait for feeding. This allows the vertical placement mechanism B2 and the first transfer mechanism 6 to always output the same number of qualified battery cells, making the feeding process smoother, improving the production efficiency and quality of lithium batteries, and requiring no manual intervention during operation, with a high degree of automation.

[0081] Specifically, such as Figure 10As shown, the vertical lifting mechanism B2 includes a vertical lifting plate B21 and a first drive assembly B22 for driving the vertical movement of the vertical lifting plate B21. The first drive assembly B22 can be a linear drive device such as a cylinder or electric cylinder; no limitation is made here. The vertical lifting plate B21 is rotatably mounted with a vertical rotating shaft B23. Several vertical mounting plates B24 are arranged axially on the vertical rotating shaft B23. A first suction cup B25 is mounted on each vertical mounting plate B24, connected to an external air pump (not shown) and used to contact the battery cell. The vertical lifting plate B21 is equipped with a second drive assembly B26 for driving the vertical rotating shaft B23 to rotate. During operation, the second drive assembly B26 first drives the vertical rotating shaft B23, causing the vertical mounting plates B24 to rotate, thereby driving the first suction cups B24 to rotate. 25 rotates to be directly above the feeding conveyor belt A1. After the feeding conveyor belt A1 conveys the battery cell to the vertical placement mechanism B2, the first drive component B22 drives the vertical placement lifting plate B21 to move vertically, so as to drive the first suction cup B25 to descend to the battery cell until it touches the battery cell. At this time, the external air pump starts, so that the first suction cup B25 forms a negative pressure to adsorb the battery cell and complete the picking operation. Then the first drive component B22 starts and drives the vertical placement lifting plate B21 to rise vertically, so that the battery cell rises with the vertical placement lifting plate B21, leaving the original position until it rises to a certain height. Then the second drive component B26 starts to drive the vertical placement rotating shaft B23 to rotate, so that the battery cell gradually changes from a horizontal state to a vertical state and waits for the handover of the first transfer mechanism 6, thereby realizing the process of changing the battery cell from a horizontal state to a vertical state.

[0082] The second drive assembly B26 includes a transmission gear B261, a transmission rack B262, and a cylinder. The transmission gear B261 is coaxially and fixedly connected to the vertical rotating shaft B23. The end of the transmission rack B262 is fixedly connected to the piston rod of the cylinder and meshes with the transmission gear B261. The cylinder is mounted on the vertical lifting plate B21. When the battery cell needs to be rotated, the cylinder drives the piston rod to move the transmission rack B262 linearly. At the same time, under the meshing action of the transmission rack B262 and the transmission gear B261, the transmission gear B261 drives the vertical rotating shaft B23 to rotate, thereby realizing the rotation of the battery cell. The precise meshing of the transmission rack B262 and the transmission gear B261 can improve the accuracy of the battery cell rotation, providing a guarantee for subsequent transfer and weighing processes.

[0083] like Figure 8As shown, the first transfer mechanism 6 includes a transfer frame B41, a dual-axis moving module B42, and a pneumatic finger B43. The dual-axis moving module B42 is mounted on the transfer frame B41, and the pneumatic finger B43 is vertically mounted on the dual-axis moving module B42. The dual-axis moving module B42 is used to drive the pneumatic finger B43 to perform vertical and lateral displacement between the vertical placement mechanism B2, the weighing seat B6, and the liquid injection mechanism C3. The pneumatic finger B43 is used to grasp the battery cell in the vertical position. After the battery cell completes the change to the vertical position under the action of the vertical placement mechanism B2, the dual-axis moving module B42... 2. The pneumatic finger B43 is first moved laterally to above the battery cell, and then moved vertically to grip the battery cell in its vertical position. Under the action of the dual-axis moving module B42, it is then transferred to the corresponding weighing seat B6 on the weighing workbench B3. After the weighing process is completed, the battery cell, which is still in its vertical position, is gripped and transported to the liquid injection mechanism C3 to complete the subsequent liquid injection process. The pneumatic finger B43 is used as a gripping tool, which can easily grip the battery bag side seal of the battery cell to reduce damage to the battery cell and adapt to the working conditions of the battery cell in its vertical position.

[0084] It should be noted that the structure and working principle of the above-mentioned flat placement mechanism 9 are the same as those of the above-mentioned vertical placement mechanism, and the structure and working principle of the above-mentioned second transfer mechanism 8 are the same as those of the above-mentioned first transfer mechanism 6.

[0085] Specifically, the aforementioned dual-axis moving module B42 includes a linear module B421, a cylinder, and a transfer mounting plate B422. The linear module B421 is mounted on one side of the transfer work frame B41, and a guide rail B423 is provided on the other side of the transfer work frame B41. The transfer mounting plate B422 is slidably disposed between the linear module B421 and the guide rail B423. The cylinder is vertically mounted on the transfer mounting plate B422 so that the linear module B421 can drive the cylinder to make lateral displacement. At the same time, the guide rail B423 can provide guidance for the transfer mounting plate B422 and improve the stability of sliding. The pneumatic finger B43 is fixedly connected to the piston rod of the cylinder so that the cylinder can drive the pneumatic finger B43 to make vertical displacement, thereby realizing the dual-axis movement of the pneumatic finger B43.

[0086] It should also be noted that, such as Figure 3 As shown, in this embodiment, the testing equipment A3 includes a CCD testing mechanism and a barcode scanning mechanism. The CCD testing mechanism is used to test the outer surface of the battery cell, and the barcode scanning mechanism is used to scan and identify the battery cell. When used together, the two can be used to test each battery cell in each work station area A2 and record the information of the work station area A2 where the unqualified battery cell is located. Both the CCD testing mechanism and the barcode scanning mechanism can be commonly used equipment on the market, which will not be described in detail here.

[0087] Specifically, refer to Figures 3 to 7The defective collection mechanism A4 includes a defective collection box A41, a first gripping component A42, and a first dual-axis moving device A43. The defective collection box A41 has an open top and is located on one side of the feeding conveyor belt A1. The first gripping component A42 is connected to the first dual-axis moving device A43 and is used to grip the defective battery cells on the feeding conveyor belt A1. The first dual-axis moving device A43 is used to drive the first gripping component A42 to move laterally and vertically. When a defective battery cell is detected, the first dual-axis moving device A43 starts and drives the first gripping component A42 to move until the first gripping component A42 picks up the corresponding battery cell. Then it moves to the defective collection box A41 and puts the defective battery cell into it, thereby completing the collection of defective battery cells.

[0088] The battery cell replenishment mechanism A5 includes a second gripping component A51 and a second dual-axis moving device A52. The second gripping component A51 is connected to the second dual-axis moving device A52 and is used to grip qualified battery cells on the feeding conveyor belt A1. The second dual-axis moving device A52 is used to drive the second gripping component A51 to perform lateral and vertical displacement. After the defective collection mechanism A4 removes the defective battery cells, the second dual-axis moving device A52 starts and, according to the record of the detection device A3, drives the second gripping component A51 to move to the qualified battery cells that are in sequence before the defective battery cells, grips the qualified battery cells, moves them to the empty workstation area A2 that needs to be replenished, and then resets them to complete the replenishment of qualified battery cells.

[0089] It should be noted that the first dual-axis moving device A43 and the second dual-axis moving device A52 in the above embodiments both include a linear module and a cylinder. The cylinder is slidably mounted on the linear module so that the linear module can drive the cylinder to make lateral displacement, and drive the piston rod of the cylinder to make the first gripping component A42 or the second gripping component A51 to make vertical displacement, thereby realizing the dual-axis displacement of the first gripping component A42 or the second gripping component A51. The linear module and the cylinder can be common equipment on the market. The first gripping component A42 and the second gripping component A51 both include a second suction cup and an air pump (not shown in the figure). The second suction cup is connected to the air pump and moves to the top of the battery cell and abuts against the battery cell to adsorb it, thereby completing the gripping process of the battery cell.

[0090] In addition, a baffle A21 is provided on one side of the feeding conveyor belt A1 along the conveying direction, and several alignment plates A22 are arranged on the feeding conveyor belt A1 along the conveying direction. The length direction of each alignment plate A22 is perpendicular to the length direction of the baffle A21. Several work area A2 is formed between the several alignment plates A22 and the baffle A21. Several work area A2 for the abutment and alignment of power supply cells is formed between the baffle A21 and the several alignment plates A22, which facilitates the abutment and alignment of the battery cells when they are fed at the feeding side of the feeding conveyor belt A1, and improves the consistency of battery cell conveying.

[0091] Furthermore, both the feeding and discharging sides of the feeding conveyor belt A1 are equipped with alignment mechanisms A6. Alignment mechanisms A6 are used to bring the battery cells in the work area A2 to the alignment plate A22 and the baffle A21 respectively, so that the battery cells are aligned. By setting alignment mechanisms A6 on the feeding side of the feeding conveyor belt A1, it is convenient for the testing equipment A3 to accurately test the battery cells and for the defective collection mechanism A4 to transfer unqualified battery cells. Setting alignment mechanisms A6 on the discharging side of the feeding conveyor belt A1 makes it convenient for the battery cell replenishment mechanism A5 to promptly re-align the qualified battery cells after replenishing them and for the output mechanism to accurately output qualified battery cells.

[0092] Specifically, the alignment mechanism A6 includes a first alignment block A61 and a second alignment block A62. The first alignment block A61 is slidably disposed on the feeding conveyor belt A1 along the conveying direction of the feeding conveyor belt A1 and is located between any two adjacent alignment plates A22. The feeding conveyor belt A1 is provided with a first driving mechanism A63. When the battery cell is located between two adjacent alignment plates A22, the first driving mechanism A63 is used to drive the first alignment block A61 to slide so as to abut the battery cell against one of the alignment plates A22. The second alignment plate A22 is slidably disposed on the feeding conveyor belt A1 along the width direction of the feeding conveyor belt A1. A second driving mechanism A64 is provided. When the first alignment block A61 abuts against the battery cell to one of the alignment plates A22, the second driving mechanism A64 drives the second alignment block A62 to abut against the battery cell to the baffle A21. When the battery cell is located between the two alignment plates A22, the first driving mechanism A63 is activated to drive the first alignment block A61 to slide and abut against the battery cell to the alignment plate A22 to complete the initial alignment of one side of the battery cell. Then, the second driving mechanism A64 is activated to drive the second alignment block A62 to slide and abut against the battery cell to the baffle A21 to complete the alignment process of the battery cell, thereby achieving precise positioning of the battery cell.

[0093] It should be noted that the first driving mechanism A63 and the second driving mechanism A64 in the above embodiments both include a lead screw motor and a cylinder. Under the cooperation of the lead screw motor and the cylinder, the first alignment block A61 or the second alignment block A62 can achieve dual-axis movement. That is, during the cell transportation process, the first alignment block A61 or the second alignment block A62 can make way by vertical movement. When cell alignment is required, it can move vertically until it is on the same horizontal plane as the cell, and then move horizontally to abut the cell against the alignment plate A22 to complete the initial alignment. The lead screw motor and the cylinder can be common models available on the market, which will not be elaborated here.

[0094] In addition, in one embodiment, an infrared sensor A7 is provided on each work station area A2 on the feeding conveyor belt A1. The infrared sensor A7, the feeding conveyor belt A1, the detection device A3 and the battery cell replenishment mechanism A5 are all controlled and connected. The infrared sensor A7 is used to detect the battery cells in the work station area A2. By setting the infrared sensor A7, it can cooperate with the battery cell replenishment mechanism A5 to detect the position of the work station area A2 that needs to be replenished with battery cells.

[0095] Preferably, such as Figure 8 and Figure 9 As shown, both the primary battery cell liquid injection weighing device 3 and the secondary battery cell liquid injection weighing device 4 include a weighing worktable B3. Several weighing sensors B5 are arranged on the weighing worktable B3, and each weighing sensor B5 is equipped with a weighing seat B6 for vertically discharging the battery cell. The weighing sensors B5 are used to detect the weight of the battery cell within the weighing seat B6. During operation, the feeding conveyor belt A1 transports the battery cells from the front-end production line to the vertical placement mechanism B2. After the vertical placement mechanism B2 picks up the battery cell and changes it from a flat position to a vertical position, the first transfer mechanism 6 transports the battery cell, still in its vertical position, to the corresponding weighing seat B6 on the weighing worktable B3. At this time, the corresponding weighing sensor B5 immediately detects the weight of the battery cell and... The data is fed back, and then the first transfer mechanism 6 transports the vertically placed battery cell to the liquid injection mechanism C3 for the subsequent liquid injection process. By setting up a weighing stand B6 that can vertically discharge the battery cell, the space occupied by traditional flat weighing can be reduced. In the same area, more battery cells can be weighed, thereby improving weighing efficiency. Furthermore, by combining it with the vertical placement mechanism B2, the battery cell can be turned into a vertical position before the first transfer mechanism 6 picks it up, that is, before the battery cell is weighed, so as to save the need to turn it again before the subsequent liquid injection. This ensures that the battery cell remains in a vertical position throughout the weighing and liquid injection process, thereby simplifying the transfer process, improving the efficiency of battery production, and optimizing the production line layout and process.

[0096] It should be noted that the load cell B5 is a device that converts a mass signal into a measurable electrical signal output. It can convert the gravity acting on the object being measured into a measurable output signal in a certain proportion, thereby realizing the accurate measurement of the object's mass. In this embodiment, it is paired with a weighing stand B6 that can vertically place the battery cell. The weight of the battery cell is obtained by measuring the weight of the weighing stand B6 with the battery cell. The structure and implementation principle of the load cell B5 are common knowledge to those skilled in the art and will not be described in detail here.

[0097] Specifically, such as Figure 9As shown, the weighing stand B6 includes a base plate B61. Several support plates B62 are symmetrically arranged on opposite sides of the base plate B61. End plates B63 are provided at opposite ends of the base plate B61. The base plate B61, support plates B62, and end plates B63 form a weighing slot for vertically placing the power supply core. The base plate B61 has a vertically opening side sealing groove B64 for accommodating the side sealing edge of the power supply core. The end plates B63 have vertically opening tab grooves B65. When the side sealing edge of the power supply core is located in the side sealing groove B64, the tab of the power supply core engages with the tab groove B65. In this assembly, the base plate B61 serves as the basic support for the weighing seat B6, transferring the weight of the battery cell. The symmetrically arranged support plates B62 support the side walls of the battery cell, and together with the end plate B63, they form a complete weighing slot. The weighing slot formed by these three components provides a vertical position for the battery cell. Furthermore, the side sealing slot B64 and the tab slot B65 allow space for the side sealing edge and tab of the battery cell, while preventing the battery cell from being subjected to unnecessary pressure and damage during the weighing process, thus enhancing the protection of the battery cell.

[0098] Furthermore, several pallets B62 are inclinedly arranged on the base plate B61 so that the width of the weighing slot gradually decreases from the outside to the inside. The symmetrical and inclined pallets B62 form a funnel-shaped slot structure. This structure helps the first transfer mechanism 6 to automatically center when picking up the battery cell and placing it into the weighing slot, which facilitates the adjustment of the battery cell position, improves production efficiency, and facilitates the removal of the battery cell.

[0099] Additionally, refer to Figures 12 to 15The flaring mechanism C2 includes a first pre-flaring component C6, a flaring base C21, and a flaring part C22. The flaring part C22 is vertically slidably disposed on the flaring base C21. The first pre-flaring component C6 is used to pre-flare the battery cell bag. The size of the flaring part C22 gradually increases from bottom to top. A second electric cylinder C23 is vertically fixedly installed on the flaring base C21. The second electric cylinder C23 is used to drive the flaring part C22 to slide vertically. After the battery bag completes the pre-flaring process, the flaring part C22 moves vertically under the action of the second electric cylinder C23 until it enters the battery bag to complete the flaring process. Furthermore, since the size of the flaring part C22 gradually increases from bottom to top, it is easier for the flaring part C22 to enter the interior of the battery bag and the possibility of damaging the battery bag can be reduced. The liquid injection mechanism C3 includes a second pre-flaring component C7, a liquid injection base C31, a liquid injection part C32, a liquid storage tank C33, and a first liquid injection part C22. A pump (not shown in the figure) and a third electric cylinder C34, and a second pre-expansion assembly C7 are used to grip the opposite sides of the battery cell bag. The liquid injection component C32 is vertically slidably mounted on the liquid injection machine base C31. The third electric cylinder C34 is vertically mounted on the liquid injection machine base C31 and is used to drive the liquid injection component C32 to move vertically. The storage tank C33 contains electrolyte. The storage tank C33 and the first liquid pump are both located on one side of the liquid injection machine base C31. One end of the first liquid pump is connected to the liquid injection component C32 through a delivery pipe (not shown in the figure), and the other end is connected to the storage tank C33 through a delivery pipe. When the battery cell moves to the liquid injection mechanism C3 through the ring track module 7, the liquid injection component C32 moves vertically under the action of the third electric cylinder C34 until it enters the battery bag. Then, the first liquid pump is started to pump the electrolyte in the storage tank C33 into the liquid injection component C32 through the delivery pipe, thereby entering the battery cell bag and completing the liquid injection.

[0100] The first pre-expansion assembly C6 and the second pre-expansion assembly C7 each include two opposing mounting seats C61 and a pre-expansion drive assembly C62. Both mounting seats C61 are horizontally slidably mounted on the flaring mechanism C2 or the liquid injection mechanism C3. Each mounting seat C61 is horizontally equipped with a second suction cup C67, which is connected to an external air pump. When the battery cell is located between the two mounting seats C61, the two second suction cups C67 are respectively used to abut against the opposite sides of the battery cell pouch. The pre-expansion drive assembly C62 is used to drive the two opposing mounting seats C61 to move towards or away from each other. When the battery cell is vertically placed on the workstation C5 and moves to the flaring mechanism C2, the pre-expansion drive assembly C62 is activated to drive the two opposing mounting seats C61 to move towards each other, causing the second suction cups C67 located on the two mounting seats C61 to move closer to the opposite sides of the battery cell pouch until they abut against it, and then... An external air pump generates a continuous suction force on the battery bag using the second suction cup C67. The pre-expansion drive assembly C62 then drives the two mounting bases C61 to move in opposite directions. The battery bag opens under the pull of the second suction cups C67 on both sides, achieving the pre-expansion operation of the first pre-expansion assembly C6. The final expansion of the battery bag is then completed by the flaring mechanism C2. When the battery cell moves to the liquid injection mechanism C3, the pre-expansion drive assembly C62 is activated, driving the two opposing mounting bases C61 to move towards each other. This causes the second suction cups C67 on the two mounting bases C61 to move closer to the opposite sides of the battery cell bag until they contact the bag. The external air pump then generates a continuous suction force on the second suction cups C67, ensuring that the battery cell bag remains in its expanded state throughout the liquid injection process. This prevents leakage caused by the battery bag's elastic reset leading to a narrowing of the opening.

[0101] In addition, both the flaring mechanism C2 and the liquid injection mechanism C3 are vertically slidably connected to the lifting plate C8. Both mounting seats C61 are installed below the lifting plate C8. Both the flaring mechanism C2 and the liquid injection mechanism C3 are vertically mounted with the first cylinder C9. The piston rod of the first cylinder C9 is fixedly connected to the lifting plate C8. By setting the lifting plate C8, an installation position can be provided for the mounting seat C61. At the same time, the height of the lifting plate C8 can be adjusted by activating the first cylinder C9, thereby driving the mounting seat C61 to move vertically, and then adjusting the height of the second suction cup C67 to make room for the battery cell loading. During the pre-expansion process, in conjunction with the pre-expansion drive component C62, the second suction cup C67 is controlled to move in a dual-axis manner to approach the two sides of the battery bag of the battery cell.

[0102] Specifically, the pre-expansion drive assembly C62 includes a connector C63. The connector C63 has two symmetrically arranged, inclined first strip-shaped sliding holes C64. Each end of one of the two mounting bases C61 is provided with a first slider C65, which slides within the two first strip-shaped sliding holes C64. A first electric cylinder C66 is vertically mounted on the connector C63, and the piston rod of the first electric cylinder C66 is fixedly connected to the connector C63. When the pre-expansion drive assembly C62 is working, the first electric cylinder C66 is activated to drive the piston rod, causing the connector C63 to move vertically. The connector C63 abuts against and drives the first slider C65 in its first strip-shaped sliding hole C64 to slide. Since the two first strip-shaped sliding holes C64 are symmetrical and inclined, the two first sliders C65 move closer or further away from each other along the length direction of the corresponding first strip-shaped sliding hole C64. Both mounting seats C61 are horizontally sliding, so that the two mounting seats C61 can move closer or further away from each other in the horizontal direction, so as to realize the function of the two mounting seats C61 and the second suction cups C67 on both sides moving towards or away from each other.

[0103] Furthermore, the injection mechanism C3 also includes a buffer replenishment tank C35 and a second liquid pump (not shown in the figure). The buffer replenishment tank C35 is located directly above the storage tank C33. The second liquid pump is connected to the buffer replenishment tank C35 and is used to transport electrolyte from the outside to the buffer replenishment tank C35. The buffer replenishment tank C35 is connected to the storage tank C33 directly below it through a delivery pipe. The second liquid pump can pump electrolyte from the outside into the buffer replenishment tank C35 to replenish the electrolyte. Under the action of gravity, the electrolyte inside the buffer replenishment tank C35 gradually flows from the buffer replenishment tank C35 into the storage tank C33 through the delivery pipe, so as to temporarily store the electrolyte and balance the pressure fluctuation during the electrolyte transportation process to a certain extent, thereby improving the stability and reliability of the injection mechanism C3.

[0104] Furthermore, the injection mechanism C3 also includes several collection boxes C36 with top openings and a movable plate C37. Each collection box C36 corresponds to one of the injection components C32 and is mounted on the movable plate C37. The movable plate C37 is slidably mounted on the injection base C31. There are collection positions along the sliding path of the collection boxes C36. When the collection box C36 is in the collection position, it is located directly below the injection component C32. The injection base C31 is equipped with a second cylinder C3 for driving the collection boxes C36 to slide. 8. After the electrolyte injection process is completed, the third electric cylinder C34 drives the electrolyte injection component C32 to move vertically upward away from the battery cell to make way for the moving plate C37 and the collection box C36. During the vertical movement, the leaked electrolyte will drip into the battery cell without leaking out. After making way, the second cylinder C38 drives the moving plate C37 to move the collection box C36 to the collection position. The leaked electrolyte drips into the collection box C36 for collection, thereby avoiding the waste of electrolyte and reducing the possibility of electrolyte splashing onto the site.

[0105] Furthermore, the size of the liquid injection component C32 gradually increases from bottom to top to facilitate the liquid injection component C32 entering the battery bag of the battery cell and to reduce the possibility of damaging the battery bag.

[0106] Reference Figures 16 to 20The vacuum sealing device 2 includes a primary vacuuming mechanism D2 and a secondary vacuuming and sealing mechanism D3. The primary vacuuming mechanism D2 is used to perform preliminary vacuuming treatment inside the battery bag of the battery cell and place the battery cell in a vacuum environment for static placement. The secondary vacuuming and sealing mechanism D3 is used to perform secondary vacuuming treatment and sealing treatment on the battery bag of the battery cell after the treatment by the primary vacuuming mechanism D2 in a vacuum environment. The battery cell is placed on the workstation C5 to ensure the positioning stability of the battery cell during the subsequent vacuuming process. Under the action of the ring track module 7, the battery cell can enter the primary vacuuming mechanism D2 and the secondary vacuuming and sealing mechanism D3 in sequence to complete the vacuuming and sealing processes. In the primary vacuuming mechanism D2, the inside of the battery bag of the battery cell can be preliminarily vacuumed to remove most of the air and impurities inside the battery bag, while placing the battery cell in a vacuum ring. The cells are left to stand in a vacuum environment. During this standing phase, the internal gas is further expelled and the internal pressure gradually stabilizes, preparing for the subsequent secondary vacuuming and sealing. This ensures the quality of the sealing process and improves the consistency of mass-produced cells. After the first vacuuming and standing, the cells are transported to the secondary vacuuming and sealing mechanism D3. In D3, the cell bag undergoes a second vacuuming process to ensure that the vacuum level inside the bag meets the standard before sealing, forming the finished cell. The secondary vacuuming and sealing mechanism D3 removes excess gas and impurities from the cell and integrates the vacuuming and sealing processes into the same mechanism. This allows the cells to be sealed simultaneously in a vacuum environment, improving the integration of processes and equipment, thereby increasing the production efficiency of lithium batteries.

[0107] It should be noted that the circular track module 7 can use conventional conveying equipment on the market, such as electric track modules, belt conveyor modules, etc. The working plate C1 is slidably installed onto the conveying equipment to realize the movement and conveying of the working plate C1.

[0108] Specifically, in this embodiment, the primary vacuuming mechanism D2 includes a vertically arranged first mounting frame D21, a first vacuum cylinder D22, and a first vacuum chamber D23. The first vacuum cylinder D22 is vertically mounted on the first mounting frame D21. The top of the first vacuum chamber D23 is fixedly connected to the piston rod of the first vacuum cylinder D22. There is a closed position on the moving path of the first vacuum chamber D23. When the first vacuum chamber D23 is in the closed position and the working plate C1 is directly below the first vacuum chamber D23, a closed cavity is formed between the first vacuum chamber D23 and the working plate C1. The vacuum chamber D23 has a first air extraction port D24, which is connected to an external air pump. When the circular track module 7 moves the working plate C1 to the first vacuum chamber D23, the piston rod driven by the first vacuum cylinder D22 is controlled to lift the first vacuum chamber D23, so as to form a closed cavity with the working plate C1. This allows the cells in each workstation C5 to be in a stable and controlled environment, which can effectively improve the accuracy and consistency of vacuuming. Then, the external air pump performs vacuuming treatment on the closed cavity through the first air extraction port D24 to remove air and impurities from inside the battery cell bag.

[0109] The secondary vacuum sealing mechanism D3 includes a vertically arranged second mounting frame D31, a second vacuum cylinder D32, and a second vacuum chamber D33. The second vacuum cylinder D32 is vertically mounted on the second mounting frame D31. The top of the second vacuum chamber D33 is fixedly connected to the piston rod of the second vacuum cylinder D32. There is a closed position on the moving path of the second vacuum chamber D33. When the second vacuum chamber D33 is in the closed position and the working plate C1 is directly below the second vacuum chamber D33, a closed cavity is formed between the second vacuum chamber D33 and the working plate C1. The second vacuum chamber D33 has a second air extraction port D34, which is connected to an external air pump. Several sealing modules D35 are arranged inside the second vacuum chamber D33 corresponding to the number of workstations C5. Between the second vacuum chamber D33 and the working plate C1... When forming a closed cavity, the sealing module D35 is used to seal the battery cells and bags on the corresponding workstation C5. When the circular track module 7 moves the work plate C1 to the second vacuum chamber D33, the piston rod driven by the second vacuum cylinder D32 is controlled to lift and lower the second vacuum chamber D33 to cooperate with the work plate C1 to form a closed cavity. This ensures that the battery cells in each workstation C5 are in a stable and controlled environment, further improving the accuracy and consistency of vacuuming. Then, the external air pump further evacuates the closed cavity through the second air extraction port D34, and the sealing process is completed simultaneously by the corresponding sealing module D35 in a vacuum environment. This allows for the sealing of the battery cells and bags while further evacuating in a vacuum environment, improving the integration of processes and equipment, and thus increasing the production efficiency of lithium batteries.

[0110] Specifically, such as Figure 20As shown, the sealing module D35 includes a lifting cylinder D351, a lifting and hot-pressing linkage assembly D352, and two hot-pressing sealing blocks D353 arranged opposite each other. The lifting cylinder D351 is vertically installed and passes through the top of the second vacuum cylinder D32. Both hot-pressing sealing blocks D353 are connected to the lifting cylinder D351 and have heating elements inside. The heating elements are used to heat the hot-pressing sealing blocks D353. The lifting and hot-pressing linkage assembly D352 is connected to the lifting cylinder D351 and drives the two hot-pressing sealing blocks D353 to move towards or away from each other when the lifting cylinder D351 drives the piston rod to move the two hot-pressing sealing blocks D353 downward or upward. The second vacuum chamber D33 and the working plate C1 are shaped... After the cavity is sealed and the secondary vacuuming process is completed, the lifting cylinder D351 drives two opposing hot-press sealing blocks D353 to move downwards towards the battery cell bag on the workstation C5. At the same time, the lifting hot-press linkage component D352 drives the two hot-press sealing blocks D353 to move towards each other until the two hot-press sealing blocks D353 respectively abut against the opposite sides of the battery cell bag. Then, the hot-press sealing blocks D353 are heated by the heating element, thereby completing the hot-press sealing operation of the battery cell bag. By setting the lifting hot-press linkage component D352, the two opposing hot-press sealing blocks D353 can perform dual-axis movement synchronously, which can improve the sealing efficiency of the battery cell bag.

[0111] Preferably, such as Figure 20 As shown, the lifting and hot-pressing linkage assembly D352 includes a lifting moving frame D3521 and a connecting plate D3522. Both the lifting moving frame D3521 and the connecting plate D3522 are fixedly connected to the piston rod of the lifting cylinder D351. The connecting plate D3522 has two symmetrically arranged and inclined second strip-shaped sliding holes D3523. Second sliders D3524 are slidably disposed within the second strip-shaped sliding holes D3523. Two hot-pressing sealing blocks D353 are respectively fixedly connected to the two second sliders D3524 and are also slidably connected to the lifting moving frame D3521. The lifting cylinder D351 drives the piston... When the rod moves downward, it will drive the lifting and moving frame D3521 and the connecting plate D3522 to move downward synchronously. At this time, the connecting plate D3522 abuts against the second slider D3524 located in the second strip-shaped sliding hole D3523. Since the second strip-shaped sliding hole D3523 is inclined, the second slider D3524 will generate horizontal displacement synchronously during the downward movement, so as to drive the hot-press sealing block D353 fixedly connected to it to generate horizontal displacement synchronously on the lifting and moving frame D3521, thereby realizing the synchronous lifting and horizontal movement of the hot-press sealing block D353, improving the sealing efficiency of the battery cell.

[0112] Furthermore, the lifting and moving frame D3521 is equipped with a guide rail D6, and both hot-press sealing blocks D353 are slidably connected to the guide rail D6. By setting the guide rail D6, the hot-press sealing blocks D353 can be guided and their sliding stability can be improved.

[0113] Reference Figures 21 to 23 The battery cell loading and unloading device 5 includes an empty tray conveyor belt E1, a full tray conveyor belt E2, a tray switching mechanism E3, and a battery cell stacking mechanism E4. An unpacking mechanism E5 is provided on the feeding side of the empty tray conveyor belt E1. The unpacking mechanism E5 is used to split the stacked trays into individual trays and transfer the trays to the feeding side of the empty tray conveyor belt E1. The empty tray conveyor belt E1 is used to transport the trays one by one to the tray switching mechanism E3. The tray switching mechanism E3 is located between the empty tray conveyor belt E1 and the full tray conveyor belt E2. A full-disk conveyor belt E2 is located between the full-disk conveyor belts E1 and E2, used to transfer trays from the empty tray conveyor belt E1 to the feed side of the full-disk conveyor belt E2. A cell stacking mechanism E4 is located on the full-disk conveyor belt E2 and used to stack finished cells into the trays. A tray stacking mechanism E6 is located on the discharge side of the full-disk conveyor belt E2, used to stack the stacked trays to form a tray pile. The full-disk conveyor belt E2 sequentially conveys the trays to the cell stacking mechanism E4 and the tray stacking mechanism E6. During operation, empty material trays are stacked on the feed side of the empty tray conveyor belt E1. The disassembly mechanism E5 can disassemble the stack of empty material trays into individual material trays, which are then transported one by one via the empty tray conveyor belt E1 to the material tray switching mechanism E3. The material tray switching mechanism E3 is responsible for transporting the empty material trays from the empty tray conveyor belt E1 to the full tray conveyor belt E2, and then the empty trays are sequentially transported via the full tray conveyor belt E2 to the cell stacking mechanism E4 and the stacking mechanism E6. During this process, the cell stacking mechanism E4 is responsible for accurately stacking the processed cells from the production line into the empty trays, and the stacking mechanism E6 is responsible for stacking the material trays filled with cells. After forming the material tray stack, it is transported to the discharge side via the full tray conveyor belt E2 to complete the discharge. The disassembly, loading, stacking and transfer processes are integrated into one, and the processes are smooth and efficient, requiring no manual intervention, reducing human error, ensuring the neat arrangement of cells and material trays, and improving the overall production efficiency of lithium batteries.

[0114] It should be noted that in this embodiment, both the empty tray conveyor belt E1 and the full tray conveyor belt E2 use two chain conveyor belts. By placing the two sides of the tray on the two chain conveyor belts respectively, it is convenient to transport the tray. At the same time, the two chain conveyor belts can make way for the stacking mechanism and the unpacking mechanism E5, thereby optimizing the equipment space layout.

[0115] Preferably, the unloading mechanism E5 includes a first horizontal support component E51, a first vertical support component E52, and a first blocking component E53. The first vertical support component E52 supports the bottom of the empty tray stack and drives the empty tray stack to move vertically. The first horizontal support component E51 horizontally clamps the trays at the current height of the empty tray stack. The first blocking component E53 blocks the trays inside the feed side of the empty tray conveyor belt E1. When the empty tray stack is placed on the feed side of the empty tray conveyor belt E1, the first blocking component E53 blocks and positions the empty tray stack, facilitating the unloading process. The vertical support component supports... Empty material trays are stacked and moved vertically until they are raised to an appropriate height. At this point, the adjacent trays of the bottom tray in the empty material tray stack are clamped by the horizontal support components and kept stationary. Then, the bottom tray is moved vertically onto the empty tray conveyor belt E1 by the vertical support components, so that the bottom tray can be separated from the empty material tray stack for subsequent conveying, thus completing the tray disassembly process. The coordinated work of the first horizontal support component E51 and the first vertical support component E52 enables the rapid and accurate disassembly of the trays, improves the automation of cell tray loading and unloading, and thus improves the production efficiency of lithium batteries.

[0116] Specifically, the first transverse support assembly E51 includes two symmetrically arranged first transverse cylinders E511, which are respectively located on opposite sides of the empty tray conveyor belt E1. A first L-shaped clamping plate E512 is installed at the piston rod of each first transverse cylinder E511, and the first L-shaped clamping plate E512 is used to abut against the side of the tray and support the bottom of the tray. The first vertical support assembly E52 includes a first vertical cylinder E521 and a first vertical support plate E522. The first vertical cylinder E521 is vertically arranged inside the empty tray conveyor belt E1, and the first vertical support plate E522 is fixedly connected to the piston rod of the first vertical cylinder E521. The first material blocking assembly E53 includes two symmetrically arranged limiting L-shaped members E531, which are respectively located on the empty tray conveyor belt E1. On both sides of the feed port E1, the bottom of the limiting L-shaped component E531 is provided with a limiting port E532. The limiting port E532 and the empty tray conveyor belt E1 form a limiting channel for a single tray to pass through. Among them, two symmetrically arranged first transverse cylinders E511, together with the first L-shaped clamping plate E512, can clamp the side of the tray and support the empty tray stack, ensuring the stability of the tray during the dismantling process. The first vertical support plate E522, together with the first vertical cylinder E521, can lift and support the empty tray stack. The limiting L-shaped component E531, together with its limiting port E532, can ensure that during the dismantling process, only the tray at the bottom of the empty tray stack can pass through the limiting channel, while other trays are blocked by the limiting L-shaped component E531. The structure is ingenious and practical.

[0117] In addition, the pallet stacking mechanism E6 includes a second lateral support component E61, a second vertical support component E62, and a second blocking component E63. The second vertical support component E62 is used to drive the pallet filled with battery cells to move vertically. The second lateral support component E61 is used to laterally clamp the pallet filled with battery cells and stack it at the current height. The second blocking component E63 is used to block the pallets inside the discharge side of the full-pan conveyor belt E2. When the pallet filled with battery cells is conveyed to the pallet stacking mechanism E6 of the full-pan conveyor belt E2, the second blocking component E63 blocks and positions the pallet filled with battery cells to facilitate the stacking process. The second vertical support component E62 supports the pallet and drives the pallet to move vertically until the pallet is fully loaded. The bottom tray of the battery cell stack is placed against the stack to complete the stacking process, and the second vertical support component E62 supports the stack. Then, the second horizontal support component E61 releases its grip on the stack, allowing the second vertical support component E62 to move the stack upward by one tray height. The second horizontal support component E61 then clamps the bottom tray and keeps it stationary to complete the stacking process. Finally, the second blocking component E63 releases its obstruction of the stack to complete the unloading process. The coordinated work of the second horizontal support component E61 and the second vertical support component E62 enables rapid and accurate stacking of the battery cells, improving the automation of battery cell loading and unloading, and thus increasing the production efficiency of lithium batteries.

[0118] Specifically, the second transverse support assembly E61 includes two symmetrically arranged second transverse cylinders E611, which are respectively located on opposite sides of the full-disc conveyor belt E2. A second L-shaped clamping plate E612 is installed at the piston rod of each second transverse cylinder E611, and the second L-shaped clamping plate E612 is used to abut against the side of the material tray and support the bottom of the material tray. The second vertical support assembly E62 includes a second vertical cylinder E621 and a second vertical support plate E622. The second vertical cylinder E621 is vertically arranged inside the full-disc conveyor belt E2, and the second vertical support plate E622 is fixedly connected to the piston rod of the second vertical cylinder E621. The second material blocking assembly E63 includes two symmetrically arranged material blocking cylinders E631. Cylinders E631 are respectively set on opposite sides of the discharge point of the full-disk conveyor belt E2. The piston rod of the blocking cylinder E631 is equipped with a discharge baffle E632. Among them, two symmetrically arranged second transverse cylinders E611, together with the second L-shaped clamping plate E612, can clamp the side of the material tray and support the material tray stack to ensure the stability of the material tray during stacking. The second vertical support plate E622, together with the second vertical cylinder E621, can lift and support the material tray or material tray stack. The blocking cylinder E631, together with the discharge baffle E632, can realize the limiting function of the material tray stack during stacking. After the stacking process is completed, the blocking cylinder E631 can open the discharge baffle E632 to release the limit and complete the discharge process.

[0119] In addition, the tray switching mechanism E3 includes a dual-axis moving module E31 and a clamping component E32 connected to the dual-axis moving module E31. The dual-axis moving module E31 is used to drive the clamping component E32 to perform vertical and lateral displacement between the discharge side of the empty tray conveyor belt E1 and the feed side of the full tray conveyor belt E2. The clamping component E32 is used to clamp both sides of the tray. The combination of the dual-axis moving module E31 and the clamping component E32 enables the transfer of empty trays from the discharge side of the empty tray conveyor belt E1 to the feed side of the full tray conveyor belt E2, which greatly improves the efficiency of tray switching and thus improves the production efficiency of lithium batteries.

[0120] Specifically, the dual-axis moving module E31 includes a linear module E311, a transfer frame E312 connected to the linear module E311, and a tray switching cylinder E313. The linear module E311 is positioned between the empty tray conveyor belt E1 and the full tray conveyor belt E2 and is used to drive the transfer frame E312 to slide. The tray switching cylinder E313 is vertically mounted on the transfer frame E312. The clamping assembly E32 includes a clamping mounting plate E321 and two symmetrically arranged push clamping cylinders E322. The clamping mounting plate E321 is fixedly connected to the piston rod of the tray switching cylinder E313. 22 are respectively set on both sides of the clamping mounting plate E321. The piston rod of the clamping cylinder E322 is equipped with a third L-shaped clamping plate E323. The third L-shaped clamping plate E323 is used to abut against the side of the material tray. The linear module E311, together with the material tray switching cylinder E313, can realize the function of dual-axis drive, so that the transfer frame E312 can drive the clamping component E32 to move to the material tray to be transferred. The third L-shaped clamping plate E323 is driven to move towards each other until it abuts against the side of the material tray by two symmetrically set clamping cylinders E322, which can realize the function of clamping and supporting the material tray.

[0121] In addition, a third vertical cylinder E7 is vertically installed inside the full-disk conveyor belt E2. A stacking baffle E8 is fixedly installed at the piston rod of the third vertical cylinder E7. The stacking baffle E8 is used to block empty material trays. When the cell stacking mechanism E4 is working, the third vertical cylinder E7 is activated to drive the stacking baffle E8 to move vertically, so that the stacking baffle E8 blocks the empty material trays conveyed by the full-disk conveyor belt E2, which facilitates the stable stacking of finished cell stacks on the empty material trays by the cell stacking mechanism E4.

[0122] It should be noted that the battery cell stacking mechanism E4 can be a conventional battery cell stacking mechanism available on the market, such as a combination of a rotary robotic arm and pneumatic fingers, to pick up the finished battery cells one by one from the unloading conveyor belt 10 and place them onto the empty material tray of the full conveyor belt E2, thus achieving battery cell stacking. There are no restrictions here.

[0123] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A battery cell electrolyte injection production line, characterized in that, include: A battery cell loading and testing device (1) is used to load battery cells and remove unqualified battery cells. The flaring mechanism (C2) is used to flare the battery cell. The liquid injection mechanism (C3) is used to inject liquid into the inside of the battery cell; Vacuum sealing device (2), which performs vacuuming and sealing treatment on the battery cell after liquid injection; A primary cell liquid filling weighing device (3) detects the weight of the cell before liquid filling; Secondary cell liquid injection weighing device (4), which detects the weight of the cell after liquid injection; The battery cell loading and unloading device (5) performs loading and unloading processing on the packaged battery cells; The conveying device sequentially conveys the battery cells from the battery cell loading and testing device (1) to the primary battery cell liquid injection weighing device (3), the flaring mechanism (C2), the liquid injection mechanism (C3), the vacuum sealing device (2), the secondary battery cell liquid injection weighing device (4), and the battery cell tray unloading device (5).

2. The cell electrolyte injection production line as described in claim 1, characterized in that, The battery cell loading and testing device (1) includes a loading conveyor belt (A1), and the loading conveyor belt (A1) is provided with a plurality of workstation areas (A2) for placing battery cells along the conveying direction; The testing equipment (A3) is set on the feeding side of the feeding conveyor belt (A1) and is used to test each of the cells in each of the workstation areas (A2) and record the information of the workstation areas (A2) where the unqualified cells are located. A defective collection mechanism (A4), which is controlled and connected to the detection equipment (A3) and is used to transfer defective cells off the feeding conveyor belt (A1); The cell replenishment mechanism (A5), which is controlled and connected to the testing equipment (A3), is used to continuously transfer previously qualified cells to the workstation area (A2) where the unqualified cells are located after the defective collection mechanism (A4) transfers the unqualified cells out of the feeding conveyor belt (A1).

3. The cell electrolyte injection production line as described in claim 2, characterized in that, The defective collection mechanism (A4) includes a defective collection box (A41), a first gripping component (A42), and a first dual-axis moving device (A43). The defective collection box (A41) has an open top and is located on one side of the feeding conveyor belt (A1). The first gripping component (A42) is connected to the first dual-axis moving device (A43) and is used to grip the defective battery cells on the feeding conveyor belt (A1). The first dual-axis moving device (A43) is used to drive the first gripping component (A42) to move laterally and vertically. The battery cell replenishment mechanism (A5) includes a second gripping component (A51) and a second dual-axis moving device (A52). The second gripping component (A51) is connected to the second dual-axis moving device (A52) and is used to grip the qualified battery cells on the feeding conveyor belt (A1). The second dual-axis moving device (A52) is used to drive the second gripping component (A51) to move laterally and vertically.

4. The cell electrolyte injection production line as described in claim 1, characterized in that, Both the primary cell liquid injection weighing device (3) and the secondary cell liquid injection weighing device (4) include a weighing workbench (B3). Several weighing sensors (B5) are arranged on the weighing workbench (B3). Each weighing sensor (B5) is provided with a weighing seat (B6) for placing the cell. The weighing sensor (B5) is used to detect the weight of the cell in the weighing seat (B6).

5. The cell electrolyte injection production line as described in claim 1, characterized in that, The flaring mechanism (C2) includes a first pre-flaring component (C6), a flaring base (C21), and a flaring part (C22). The first pre-flaring component (C6) is used to pre-flare the battery cell bag. The flaring part (C22) is vertically slidably disposed on the flaring base (C21). The size of the flaring part (C22) gradually increases from bottom to top. A second electric cylinder (C23) is vertically fixedly installed on the flaring base (C21). The second electric cylinder (C23) is used to drive the flaring part (C22) to slide vertically. The liquid injection mechanism (C3) includes a second pre-expansion assembly (C7), a liquid injection base (C31), a liquid injection component (C32), a liquid storage tank (C33), a first liquid pump, and a third electric cylinder (C34). The second pre-expansion assembly (C7) is used to grip the opposite sides of the battery cell pouch to keep the battery cell pouch open. The liquid injection component (C32) is vertically slidably disposed on the liquid injection base (C31). The third electric cylinder (C34) is vertically mounted on the liquid injection base (C31) and is used to drive the liquid injection component (C32) to move vertically. The liquid storage tank (C33) contains electrolyte. The liquid storage tank (C33) and the first liquid pump are both disposed on one side of the liquid injection base (C31). One end of the first liquid pump is connected to the liquid injection component (C32) through a liquid infusion pipe, and the other end is connected to the liquid storage tank (C33) through a liquid infusion pipe.

6. The cell electrolyte injection production line as described in claim 5, characterized in that, Both the first pre-expansion assembly (C6) and the second pre-expansion assembly (C7) include two opposing mounting seats (C61) and a pre-expansion drive assembly (C62). The two mounting seats (C61) are horizontally slidably disposed on the flaring mechanism (C2) or the liquid injection mechanism (C3). Each mounting seat (C61) is horizontally provided with a second suction cup (C67). The second suction cup (C67) is connected to an external air pump. When the battery cell is located between the two mounting seats (C61), the two second suction cups (C67) are respectively used to abut against the opposite sides of the battery cell bag. The pre-expansion drive assembly (C62) is used to drive the two opposing mounting seats (C61) to move towards or away from each other.

7. The cell electrolyte injection production line as described in claim 1, characterized in that, The vacuum sealing device (2) includes a primary vacuuming mechanism (D2) and a secondary vacuuming and sealing mechanism (D3). The primary vacuuming mechanism (D2) is used to perform preliminary vacuuming treatment on the inside of the battery cell bag and place the battery cell in a vacuum environment for static treatment. The secondary vacuuming and sealing mechanism (D3) is used to perform secondary vacuuming treatment and sealing treatment on the battery cell bag after the primary vacuuming mechanism (D2) in a vacuum environment.

8. The cell electrolyte injection production line as described in claim 7, characterized in that, The secondary vacuum sealing mechanism (D3) includes a vertically arranged second mounting frame (D31), a second vacuum cylinder (D32), and a second vacuum chamber (D33). The second vacuum cylinder (D32) is vertically mounted on the second mounting frame (D31). The top of the second vacuum chamber (D33) is fixedly connected to the piston rod of the second vacuum cylinder (D32). There is a closed position on the moving path of the second vacuum chamber (D33). When the second vacuum chamber (D33) is in this closed position, and the conveying device delivers the battery cell directly below the second vacuum chamber (D33), a closed cavity is formed between the second vacuum chamber (D33) and the conveying device. The second vacuum chamber (D33) has a second air extraction port (D34), which is connected to an external air pump. The second vacuum chamber (D33) has several sealing modules (D35) inside, corresponding to the number of battery cells. Each sealing module (D35) includes a lifting cylinder (D351), a lifting and hot-pressing linkage assembly (D352), and two hot-pressing sealing blocks (D353) arranged opposite each other. The lifting cylinder (D351) is vertically installed and passes through the top of the second vacuum cylinder (D32). Both hot-pressing sealing blocks (D353) are connected to the lifting cylinder (D351) and have heating elements inside. The heating elements are used to heat the hot-pressing sealing blocks (D353). The lifting and hot-pressing linkage assembly (D352) is connected to the lifting cylinder (D351) and drives the two hot-pressing sealing blocks (D353) to move downward or upward when the lifting cylinder (D351) drives the piston rod to move the two hot-pressing sealing blocks (D353) towards or away from each other.

9. A cell electrolyte injection production line as described in claim 8, characterized in that, The lifting and hot-pressing linkage assembly (D352) includes a lifting moving frame (D3521) and a connecting plate (D3522). Both the lifting moving frame (D3521) and the connecting plate (D3522) are fixedly connected to the piston rod of the lifting cylinder (D351). The connecting plate (D3522) has two symmetrical and inclined second strip-shaped sliding holes (D3523). A second slider (D3524) is slidably disposed in the second strip-shaped sliding hole (D3523). The two hot-pressing sealing blocks (D353) are respectively fixedly connected to the two second sliders (D3524) and are both slidably connected to the lifting moving frame (D3521).

10. A cell electrolyte injection production line as described in claim 1, characterized in that, The cell loading and unloading device (5) includes an empty tray conveyor belt (E1), a full tray conveyor belt (E2), a tray switching mechanism (E3), and a cell stacking mechanism (E4). The empty tray conveyor belt (E1) has a dismantling mechanism (E5) on its feeding side. The dismantling mechanism (E5) is used to split the stacked trays into individual trays and transfer them to the feeding side of the empty tray conveyor belt (E1). The empty tray conveyor belt (E1) is used to transport the trays one by one to the tray switching mechanism (E3). The tray switching mechanism (E3) is located between the empty tray conveyor belt (E1) and the full tray conveyor belt (E2). The full-reel conveyor belt (E2) is used to transfer the material tray from the empty-reel conveyor belt (E1) to the feeding side of the full-reel conveyor belt (E2). The cell stacking mechanism (E4) is disposed on the full-reel conveyor belt (E2) and is used to stack the finished cells into the material tray. The discharge side of the full-reel conveyor belt (E2) is provided with a stacking mechanism (E6), which is used to stack the stacked material trays to form a material tray pile. The full-reel conveyor belt (E2) is used to transport the material trays sequentially to the cell stacking mechanism (E4) and the stacking mechanism (E6).

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