Isobaric injection machine

Abstract

This invention discloses an isobaric liquid injection machine, comprising a feeding conveyor, a circulating transfer device, a discharging conveyor, and a three-moving manipulator. The feeding conveyor is used to input lithium battery casings; the circulating transfer device is used to circulate and transport isobaric fixtures capable of loading lithium battery casings; the circulating transfer device is sequentially equipped with a fixture residual liquid cleaning device, a vacuum liquid injection device, and multiple positive and negative pressure supply devices. The fixture residual liquid cleaning device can separate or merge the upper and lower cavities of the isobaric fixture, push the lower cavity to the loading / unloading station, and clean residual liquid from the upper cavity; the discharging conveyor is arranged in a straight line with the feeding conveyor and is used to output the liquid-injected lithium batteries; the three-moving manipulator is located between the feeding and discharging conveyors and between the circulating transfer device and the loading / unloading station. This isobaric liquid injection machine has the advantages of compact and reasonable layout, small footprint, fully automatic production, high production efficiency, good liquid injection effect, and low production cost.

Description

Technical Field

[0001] This invention relates to a lithium battery filling machine, and more particularly to an isobaric filling machine. Background Technology

[0002] The rise of the new energy industry has driven the development of lithium batteries, leading to rapid upgrades in lithium battery manufacturing equipment. Lithium battery electrolyte filling is a crucial step in lithium battery production, and the electrolyte settling process is an important component of lithium battery electrolyte filling equipment. However, existing lithium battery electrolyte filling machines generally suffer from drawbacks such as unreasonable layout, large footprint, and semi-automatic operation, resulting in low battery production efficiency and high costs. These shortcomings limit further equipment development. Furthermore, existing differential pressure electrolyte filling machines, which utilize pressure difference, suffer from low electrolyte absorption efficiency, poor wetting effect, and easy deformation of the casing, affecting battery quality. Meanwhile, existing bell-type isobaric electrolyte filling machines are bulky, structurally heavy, and expensive; the entire clamping unit relies on RGV trolleys for battery movement, resulting in high costs. Summary of the Invention

[0003] The purpose of this invention is to provide an isobaric liquid injection machine with a compact and reasonable layout, small footprint, fully automatic production, high production efficiency, good liquid injection effect, and low production cost.

[0004] To achieve the above objectives, the isobaric injection machine provided by the present invention includes a feeding conveying device, a circulating transfer device, a discharging conveying device, and a three-moving sub-manipulator. The feeding conveying device is used to input lithium battery casings; and the feeding conveying device is sequentially equipped with a first barcode scanning device and a first weighing device along the conveying direction. The first barcode scanning device scans and records the graphic code on the lithium battery casing; the first weighing device weighs the lithium battery casing; the circulating transfer device is used to circulate and transport isobaric clamps capable of loading lithium battery casings; and the circulating transfer device is sequentially equipped with... The device includes a fixture residual liquid cleaning device, a vacuum injection device, and multiple positive and negative pressure supply devices. The fixture residual liquid cleaning device can separate or combine the upper and lower cavities of the isobaric fixture, push the lower cavity to the loading and unloading station, and clean residual liquid from the upper cavity. The vacuum injection device is located above the circulating transfer device and can vacuum inject liquid into the lithium battery casings within the isobaric fixture. The positive and negative pressure supply devices are located above the circulating transfer device and can simultaneously apply positive or negative pressure to the inside and outside of the injected lithium battery within the isobaric fixture. The process involves a stationary loading and unloading system. The unloading conveyor and the loading conveyor are arranged in a straight line for outputting lithium batteries after electrolyte injection. The unloading conveyor is sequentially equipped with a second barcode scanner, a second weighing device, a electrolyte replenishment device, and a pin insertion device along the conveying direction. The second barcode scanner scans and records the graphic code on the lithium battery casing. The second weighing device weighs the lithium battery casing. The electrolyte replenishment device replenishes electrolyte to lithium batteries that fail to meet the weight requirements. The pin insertion device inserts pins into the electrolyte injection port of the lithium battery. The three-wheeled robotic arm is mounted on the loading conveyor. The three-moving manipulator is positioned between the unloading conveyor and the circulating transfer device and the loading / unloading station; the first moving manipulator is used to transfer the lithium battery casing on the loading conveyor to the lower cavity located at the loading / unloading station; the second moving manipulator is used to transfer the lithium battery in the lower cavity of the loading / unloading station to the unloading conveyor; the third moving manipulator is used to transfer lithium batteries that fail to meet the weighing requirements between the weighing device and the liquid replenishment device.

[0005] Compared with existing technologies, this invention achieves automatic feeding and unloading of lithium batteries by arranging a feeding and unloading conveyor in a straight line. The feeding conveyor is equipped with a first scanning device and a first weighing device in sequence, while the unloading conveyor is equipped with a second scanning device, a second weighing device, a liquid replenishment device, and a pin insertion device in sequence. Furthermore, during unloading, defective lithium batteries can be automatically replenished with liquid and pinned. In addition, a circulating transfer device is provided, on which a fixture residual liquid cleaning device, a vacuum liquid injection device, and multiple positive and negative pressure supply devices are sequentially arranged. This allows for cleaning of the fixtures and vacuum liquid injection and positive and negative pressure settling of the lithium batteries. The U-shaped flow pattern of the circulating transfer device avoids excessively long production lines, effectively utilizes the horizontal and vertical space of the production workshop, and improves the compactness and rationality of the equipment structure and layout. Furthermore, by installing a three-moving robotic arm between the feeding conveyor, the unloading conveyor, and the circulating transfer device, the first robotic arm enables automatic feeding of lithium battery casings between the feeding conveyor and the circulating transfer device, the second robotic arm enables automatic unloading of lithium batteries between the unloading conveyor and the circulating transfer device, and the third robotic arm enables the transfer of lithium batteries between the weighing device and the liquid replenishment device. The three robotic arms can work synchronously without interfering with each other, thus achieving fully automated production without the need for manual operation, greatly improving work efficiency. Moreover, the use of isobaric clamps and positive and negative pressure supply devices for isobaric liquid injection and isobaric settling of lithium batteries results in excellent liquid injection performance, which is beneficial to reducing overall production costs.

[0006] Preferably, the isobaric liquid injection machine further includes a wiping device disposed between the liquid replenishment device and the pin insertion device to remove residual liquid near the lithium battery injection port. By providing the wiping device, the lithium battery injection port can be automatically cleaned before material feeding, preventing residual liquid from contaminating the next process.

[0007] Specifically, the wiping device includes a wet wiping mechanism and a dry wiping mechanism arranged in sequence. The wet wiping mechanism is used to absorb most of the residual liquid, and the dry wiping mechanism is used to dry the residual liquid at the lithium battery filling port.

[0008] Specifically, the wiping device includes a cleaning liquid dripping mechanism disposed before the wet wiping mechanism, which drips cleaning liquid onto the residual liquid to dilute or dissolve the residual liquid.

[0009] Preferably, a voltage testing device is also provided between the first scanning device and the first weighing device. The voltage testing device is used to perform leakage current testing on the lithium battery. This ensures that the lithium battery meets quality standards before electrolyte filling and improves the yield rate after electrolyte filling.

[0010] Preferably, a first defective station is provided on one side of the first weighing device, where the first moving robot arm can transfer the lithium battery casings that fail the weighing test to the first defective station; a second defective station is provided on one side of the second weighing device, where the third moving robot arm can transfer the lithium batteries that fail the weighing test to the second defective station. By setting the first and second defective stations, lithium batteries that fail before loading and lithium batteries that fail after liquid filling can be removed, thereby improving the product yield.

[0011] Preferably, the circulating transfer device is equipped with a locking drive device and an unlocking drive device. The locking drive device is located before the vacuum injection device and locks the upper and lower cavities of the isobaric fixture. The unlocking drive device is located on the circulating transfer device and after the last positive and negative pressure supply device, and unlocks the upper and lower cavities of the isobaric fixture. Since the upper and lower cavities of the isobaric fixture are separable, the sealing performance of the isobaric fixture is highly required before injection. Therefore, by setting the locking drive device, the stability of the connection between the upper and lower cavities can be ensured, thereby maintaining the sealing performance of the isobaric fixture. Similarly, by setting the unlocking drive device, the isobaric fixture can be automatically unlocked, ensuring that the upper and lower cavities can be separated.

[0012] Preferably, the fixture residual liquid cleaning device includes an upper chamber cleaning device and a lower chamber liquid receiving device. The upper chamber cleaning device includes a fixed bracket, a lifting bracket, a lifting drive mechanism, a docking mechanism, and a moving drive mechanism. The lifting bracket is slidably mounted on the fixed bracket and has a first engaging member at its lower end that can engage with the engaging groove of the upper chamber of the isobaric fixture. The lifting drive mechanism is mounted on the fixed bracket and its output end is connected to the lifting bracket to drive the lifting bracket to move up and down. The moving drive mechanism is mounted on the fixed bracket. The upper output end is connected to the docking mechanism to drive the docking mechanism to communicate with the air port of the upper cavity of the isobaric fixture; the lower cavity liquid receiving device includes a base, a translational push-pull mechanism, a lifting mechanism, and a liquid receiving mechanism. The translational push-pull mechanism is disposed on the base and its telescopic end is provided with a second engaging member that can engage with the engaging groove of the lower cavity of the isobaric fixture; the liquid receiving mechanism is disposed at the output end of the lifting mechanism and the lifting mechanism is disposed at the telescopic end of the translational push-pull mechanism to push the liquid receiving mechanism to communicate with the upper cavity of the isobaric fixture. By setting a lifting bracket and providing a first engaging member at the lower end of the lifting bracket, and providing an engaging groove on the upper cavity of the isobaric fixture, the upper cavity of the isobaric fixture can automatically connect with the lifting bracket through the engaging groove when it moves close to the upper cavity cleaning device. Then, the lifting drive mechanism drives the lifting bracket to rise and fall, thereby separating the upper cavity from the lower cavity. Furthermore, by installing a docking mechanism and a moving drive mechanism on the fixed bracket, the moving drive mechanism drives the docking mechanism closer to the upper cavity, allowing it to dock with the interior of the upper cavity. Therefore, by introducing cleaning fluid or high-pressure gas into the docking mechanism, the upper cavity can be cleaned. Simultaneously, a lifting mechanism and a liquid receiving mechanism are installed on the liquid receiving device in the lower cavity. The lifting mechanism pushes the liquid receiving device to dock with the upper cavity, thus receiving residual liquid in the upper cavity and preventing leakage that could contaminate other lithium batteries, ensuring reliable and safe cleaning. In addition, by installing a translational push-pull mechanism and a second engaging component, and an engaging groove on one side of the lower cavity, the lower cavity automatically engages with the second engaging component when it moves closer to the liquid receiving device, achieving connection. Then, the translational push-pull mechanism pushes the lower cavity to move, allowing it to enter the loading / unloading station for loading and unloading while the upper cavity is being cleaned, avoiding waiting time, effectively saving time, and improving production efficiency. The entire fixture residual liquid cleaning device can automatically divide and close the chambers, automatically clean, and automatically receive materials, with a high degree of automation and high production efficiency.

[0013] Specifically, the lifting bracket includes two pairs of connecting rods and a connecting frame symmetrically arranged on both sides of the fixed bracket. The connecting rods are slidably sleeved on the sliding sleeves of the fixed bracket. The lower end of the connecting rod is provided with the first engaging member. When the isobaric clamp moves towards the upper cavity cleaning device, the engaging groove of the upper cavity engages with the first engaging member. This allows the lifting bracket to have multiple connection points when connected to the upper cavity, ensuring the stability and reliability of the connection.

[0014] Specifically, the lower cavity liquid receiving device further includes a pushing mechanism, which is disposed at the telescopic end of the translational push-pull mechanism, and the output end of the pushing mechanism is connected to the lifting mechanism. The pushing direction of the pushing mechanism is the same as the telescopic direction of the translational push-pull mechanism. By providing the pushing mechanism, when the lower cavity separates from the upper cavity and moves away from below the upper cavity, the lifting mechanism can be moved to below the upper cavity, thereby facilitating the lifting mechanism to push the liquid receiving mechanism to dock with the upper cavity. Attached Figure Description

[0015] Figure 1 This is a perspective view of the isobaric liquid injection machine of the present invention.

[0016] Figure 2 This is a schematic diagram showing the arrangement of the various devices in the isobaric injection machine of the present invention.

[0017] Figure 3 This is a structural diagram of the three-moving manipulator of the isobaric injection machine of the present invention.

[0018] Figure 4 This is a perspective view of the clamp residual liquid cleaning device of the isobaric liquid injection machine of the present invention.

[0019] Figure 5 This is a front view of the clamp residual liquid cleaning device of the isobaric liquid injection machine of the present invention.

[0020] Figure 6 This is a side view of the clamp residual liquid cleaning device of the isobaric liquid injection machine of the present invention.

[0021] Figure 7 This is a structural diagram of the upper chamber cleaning device of the clamp residual liquid cleaning device of the isobaric liquid injection machine of the present invention.

[0022] Figure 8 This is a structural diagram of the liquid receiving device in the lower chamber of the clamp residual liquid cleaning device of the isobaric liquid injection machine of the present invention.

[0023] Figure 9 This is a structural diagram of the isobaric clamp of the isobaric injection machine of the present invention.

[0024] Figure 10 This is a side view of the isobaric clamp of the isobaric injection machine of the present invention.

[0025] Figure 11 This is a diagram showing the state of the upper and lower chambers of the isobaric liquid injection machine of the present invention when they are separated. Detailed Implementation

[0026] To illustrate the technical content, structural features, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0027] like Figures 1 to 3As shown, the isobaric injection machine 100 of the present invention includes a feeding conveying device 1, a circulating transfer device 2, a discharging conveying device 3, and a three-moving manipulator 4. The feeding conveying device 1 is used to input lithium battery casings; and the feeding conveying device 1 is sequentially provided with a first barcode scanning device 11 and a first weighing device 12 along the conveying direction. The first barcode scanning device 11 scans and records the graphic code on the lithium battery casing; the first weighing device 12 weighs the lithium battery casing; the circulating transfer device 2 is used to circulate and convey the isobaric fixture 200 that can load the lithium battery casing, and the circulating transfer device 2 is in a U-shape conveying pattern; and the circulating transfer device 2 is sequentially provided with... The device includes a fixture residual liquid cleaning device 21, a vacuum injection device 22, and multiple positive and negative pressure supply devices 23. The fixture residual liquid cleaning device 21 can separate or combine the upper cavity 210 and lower cavity 220 of the isobaric fixture 200, and can push the lower cavity 220 to the loading / unloading station 101, and can clean the residual liquid in the upper cavity 210. The vacuum injection device 22 is located above the circulation transfer device 2 and can vacuum inject liquid into the lithium battery casing inside the isobaric fixture 200. The positive and negative pressure supply devices 23 are located above the circulation transfer device 2 and can simultaneously supply liquid to the inside and outside of the injected lithium battery inside the isobaric fixture 200. The lithium batteries are placed under positive or negative pressure for static storage. The unloading conveyor 3 and the loading conveyor 1 are arranged in a straight line for outputting the lithium batteries after liquid injection. The unloading conveyor 3 is equipped with a second scanning device 31, a second weighing device 32, a liquid replenishment device 33, and a pin insertion device 34 in sequence along the conveying direction. The second scanning device 31 scans and records the graphic code on the lithium battery casing. The second weighing device 32 weighs the lithium battery casing. The liquid replenishment device 33 replenishes the liquid for lithium batteries that fail to meet the weight requirements. The pin insertion device 34 inserts a pin into the liquid injection port of the lithium battery. The three-moving sub-manipulator 4 is located between the loading conveyor 1 and the loading conveyor 2. The material feeding conveyor 3 is located between the circulating transfer device 2 and the loading / unloading station 101; the first moving manipulator 41 of the three-moving manipulator 4 is used to transfer the lithium battery casing on the loading conveyor 1 to the lower cavity 220 located in the loading / unloading station 101; the second moving manipulator 42 of the three-moving manipulator 4 is used to transfer the lithium battery located in the lower cavity 220 of the loading / unloading station 101 to the material feeding conveyor 3; the third moving manipulator 43 of the three-moving manipulator 4 is used to transfer the lithium battery that fails to meet the weighing requirements between the weighing device and the liquid replenishment device 33.

[0028] Please see again Figure 2 A voltage testing device 13 is also provided between the first scanning device 11 and the first weighing device 12. The voltage testing device 13 is used to perform leakage current testing on the lithium battery. This ensures that the lithium battery meets quality standards before electrolyte filling and improves the yield rate after electrolyte filling.

[0029] Please see again Figure 2 The first weighing device 12 has a first defective station 14 on one side, where the first moving robot 41 can transfer the lithium battery casings that fail the weighing test to the first defective station 14. The second weighing device 32 has a second defective station 35 on one side, where the third moving robot 43 can transfer the lithium batteries that fail the weighing test to the second defective station 35. By setting the first defective station 14 and the second defective station 35, lithium batteries that fail before loading and lithium batteries that fail after liquid filling can be removed, thereby improving the product yield.

[0030] Please see again Figure 2 The isobaric liquid injection machine 100 further includes a wiping device 36, which is disposed between the liquid replenishment device 33 and the pin insertion device 34 to remove residual liquid near the lithium battery injection port. Specifically, the wiping device 36 includes a dripping cleaning liquid mechanism 361, a wet wiping mechanism 362, and a dry wiping mechanism 363 arranged sequentially. The dripping cleaning liquid mechanism 361 drips cleaning liquid onto the residual liquid to dilute or dissolve it. The wet wiping mechanism 362 absorbs most of the residual liquid, and the dry wiping mechanism 363 dries the residual liquid at the lithium battery injection port. By providing the wiping device 36, the lithium battery injection port can be automatically cleaned before material feeding, preventing residual liquid from contaminating the next process.

[0031] Please see Figure 2 The circulating transfer device 2 is equipped with a locking drive device 24 and an unlocking drive device 25. The locking drive device 24 is located before the vacuum injection device 22 and locks the upper cavity 210 and lower cavity 220 of the isobaric clamp 200. The unlocking drive device 25 is located on the circulating transfer device 2 and after the last positive and negative pressure supply device 23, and unlocks the upper cavity 210 and lower cavity 220 of the isobaric clamp 200. Since the upper cavity 210 and lower cavity 220 of the isobaric clamp 200 are separable, the sealing performance of the isobaric clamp 200 is highly required before injection. Therefore, by setting the locking drive device 24, the stability of the connection between the upper cavity 210 and the lower cavity 220 can be ensured, thereby maintaining the sealing performance of the isobaric clamp 200. Similarly, by setting the unlocking drive device 25, the isobaric clamp 200 can be automatically unlocked, ensuring that the upper cavity 210 and lower cavity 220 can be separated.

[0032] Please see Figures 4 to 11The clamp residual liquid cleaning device 21 includes an upper cavity cleaning device 211 and a lower cavity liquid receiving device 212. The upper cavity cleaning device 211 includes a fixed bracket 2111, a lifting bracket 2112, a lifting drive mechanism 2113, a docking mechanism 2114, and a moving drive mechanism 2115. The lifting bracket 2112 is slidably disposed on the fixed bracket 2111 and has a first engaging member 2112c at its lower end that can engage with the engaging groove 210a of the upper cavity 210 of the isobaric clamp 200. The first engaging member 2112c has a T-shaped structure, and the engaging groove 210a has a T-shaped groove. The lifting drive mechanism 2113 is mounted on the fixed bracket 2111 and its output end is connected to the lifting bracket 2112 to drive the lifting bracket 2112 to rise and fall; the moving drive mechanism 2115 is mounted on the fixed bracket 2111 and its output end is connected to the docking mechanism 2114 to drive the docking mechanism 2114 to communicate with the air port of the upper cavity 210 of the isobaric clamp 200; the lower cavity liquid receiving device 212 includes a base 2121, a translational push-pull mechanism 2122, a lifting mechanism 2123, and a liquid receiving mechanism 2124. The translational push-pull mechanism 2122 is disposed on the base 2121 and its telescopic end is provided with a second engaging member 2122d that can engage with the engaging groove 220a of the lower cavity 220 of the isobaric clamp 200. The second engaging member 2122d has a T-shaped structure and the engaging groove 220a has a T-shaped groove. The liquid receiving mechanism 2124 is disposed at the output end of the lifting mechanism 2123 and the lifting mechanism 2123 is disposed at the telescopic end of the translational push-pull mechanism 2122 to push the liquid receiving mechanism 2124 to communicate with the upper cavity 210 of the isobaric clamp 200. By setting a lifting bracket 2112 and a first engaging member 2112c at the lower end of the lifting bracket 2112, and an engaging groove 210a on the upper cavity 210 of the isobaric clamp 200, the upper cavity 210 of the isobaric clamp 200 can automatically connect with the lifting bracket 2112 through the engaging groove 210a when it moves closer to the upper cavity cleaning device 211. Then, the lifting drive mechanism 2113 drives the lifting bracket 2112 to rise and fall, thereby separating the upper cavity 210 from the lower cavity 220. Furthermore, by setting a docking mechanism 2114 and a moving drive mechanism 2115 on the fixed bracket 2111, the moving drive mechanism 2115 drives the docking mechanism 2114 closer to the upper cavity 210, thereby docking with the inside of the upper cavity 210. Therefore, by introducing cleaning fluid or high-pressure gas into the docking mechanism 2114, the upper cavity 210 can be cleaned.Meanwhile, a lifting mechanism 2123 and a liquid receiving mechanism 2124 are provided on the lower cavity liquid receiving device 212. The lifting mechanism 2123 pushes the liquid receiving mechanism 2124 to dock with the upper cavity 210, thus receiving residual liquid in the upper cavity 210, preventing residual liquid leakage and contamination of other lithium batteries, and ensuring reliable and safe cleaning. In addition, by providing a translational push-pull mechanism 2122 and a second engaging member 2122d, an engaging groove 220a is provided on one side of the lower cavity 220, so that when the lower cavity 220 moves close to the lower cavity liquid receiving device 212, it can automatically engage with the second engaging member 2122d to achieve connection. Then, the translational push-pull mechanism 2122 pushes the lower cavity 220 to translate, so that the lower cavity 220 can enter the loading and unloading station 101 for loading and unloading while the upper cavity 210 is being cleaned, avoiding waiting, effectively saving time, and improving production efficiency. The entire fixture residual liquid cleaning device 21 can automatically divide and close the chambers, automatically clean, and automatically receive materials, with a high degree of automation and high production efficiency.

[0033] For example Figure 7 and Figure 11 As shown, the lifting bracket 2112 includes two pairs of connecting rods 2112a and a connecting frame 2112b symmetrically arranged on both sides of the fixed bracket 2111. The connecting rods 2112a are slidably sleeved on the sliding sleeves 2112d of the fixed bracket 2111. The lower end of the connecting rod 2112a is provided with the first engaging member 2112c. When the isobaric clamp 200 moves toward the upper cavity cleaning device 211, the engaging groove 210a of the upper cavity 210 engages with the first engaging member 2112c. This allows the lifting bracket 2112 to have multiple connection points when connected to the upper cavity 210, ensuring the stability and reliability of the connection.

[0034] For example Figure 7 As shown, the lifting drive mechanism 2113 includes a lifting motor 2113a, a lead screw 2113b, and a slider 2113c. The lifting motor 2113a is mounted on the fixed bracket 2111 and its output end is connected to the lead screw 2113b. The lead screw 2113b is threadedly connected to the slider 2113c. The slider 2113c is connected to the connecting frame 2112b of the lifting bracket 2112.

[0035] For example Figure 7As shown, the docking mechanism 2114 includes a docking block 2114a and an air nozzle 2114b. The docking block 2114a is connected to the output end of the moving drive mechanism 2115. The docking block 2114a is connected to a high-pressure blowing device or a cleaning fluid delivery device. The high-pressure blowing device or the cleaning fluid delivery device can introduce high-pressure gas into the docking block 2114a to blow out residual liquid from the upper cavity 210 or introduce cleaning fluid to clean the inside of the upper cavity 210. The air nozzle 2114b is located on the lower side of the docking block 2114a and is connected to the docking block 2114a. The air nozzle 2114b can be connected to the air port of the upper cavity 210 of the isobaric clamp 200. By setting the docking block 2114a, multiple air nozzles 2114b can be installed on the docking block 2114a simultaneously. Therefore, only one docking block 2114a needs to be driven to drive multiple air nozzles 2114b at the same time. Thus, when the upper cavity 210 has multiple injection chambers, these chambers can be cleaned simultaneously, greatly improving cleaning efficiency and production efficiency. Specifically, a guide rod 2114c extends upward from the upper side of the docking block 2114a, and a guide sleeve 2114d is provided on the fixed bracket 2111. The guide rod 2114c is slidably inserted into the guide sleeve 2114d. The cooperation between the guide rod 2114c and the guide sleeve 2114d ensures the stability of the lifting and lowering of the docking block 2114a, thereby ensuring docking accuracy and preventing leakage.

[0036] Please see Figure 8 The translational push-pull mechanism 2122 includes a translational drive mechanism 2122a, a first sliding platform 2122b, and a push-pull rod 2122c. The first sliding platform 2122b is slidably disposed on the base 2121. The output end of the translational drive mechanism 2122a is connected to the first sliding platform 2122b. The translational drive mechanism 2122a is driven by a motor to move a lead screw nut. The push-pull rod 2122c is disposed at the front end of the first sliding platform 2122b, and the front end of the push-pull rod 2122c is provided with a second engaging member 2122d.

[0037] For example Figure 8As shown, the lower chamber liquid receiving device 212 further includes a pushing mechanism 2125. The pushing mechanism 2125 is disposed at the telescopic end of the translational push-pull mechanism 2122, and the output end of the pushing mechanism 2125 is connected to the lifting mechanism 2123. The pushing direction of the pushing mechanism 2125 is the same as the telescopic direction of the translational push-pull mechanism 2122. The pushing mechanism 2125 is a cylinder. By setting the pushing mechanism 2125, when the lower chamber 220 separates from the upper chamber 210 and moves away from below the upper chamber 210, the lifting mechanism 2123 can be moved to below the upper chamber 210, thereby facilitating the lifting mechanism 2123 to push the liquid receiving mechanism 2124 to dock with the upper chamber 210.

[0038] For example Figure 8 As shown, the lifting mechanism 2123 includes a sliding block 2123a, a lifting cylinder 2123b, and a connecting block 2123c. The sliding block 2123a is slidably disposed on the telescopic end of the translational push-pull mechanism 2122. The lifting cylinder 2123b is fixed on the sliding block 2123a, and its output end extends upward and is connected to the connecting block 2123c. The connecting block 2123c is connected to the liquid receiving mechanism 2124.

[0039] For example Figure 8 As shown, the liquid receiving mechanism 2124 includes a connector 2124a and a connecting nozzle 2124b. The connector 2124a is disposed at the output end of the lifting mechanism 2123, and the connecting nozzle 2124b is disposed on the connector 2124a and communicates with the connector 2124a.

[0040] When the clamp residual liquid cleaning device 21 is in operation, the lifting drive mechanism 2113 activates and drives the lifting bracket 2112, which in turn drives the upper cavity 210 to rise and move away from the lower cavity 220, separating the upper cavity 210 from the lower cavity 220. Simultaneously, the translational push-pull mechanism 2122 pushes the lower cavity 220 forward and into the loading / unloading station 101, allowing the lithium battery to be loaded into the lower cavity 220. Furthermore, the pushing mechanism 2125 pushes the lifting mechanism 2123 forward, positioning it below the upper cavity 210. At this point, after the upper cavity 210 reaches its highest point, the moving drive mechanism 2115 drives the docking mechanism 2114 downward to dock with the upper end of the upper cavity 210, while the lifting mechanism 2123 drives the liquid receiving mechanism 2124 upward to dock with the lower end of the upper cavity 210. At this point, cleaning fluid or high-pressure gas can be injected into the upper cavity 210 through the docking mechanism 2114 to flush out the residual liquid in the upper cavity 210 and allow it to flow into the liquid receiving mechanism 2124. The liquid receiving mechanism 2124 then outputs the residual liquid through a storage tank connected to the outside. When the upper cavity 210 is cleaned and the lower cavity 220 is filled, the liquid receiving mechanism 2124 and the docking mechanism 2114 leave the upper cavity 210, and the pushing mechanism 2125 pushes the lifting mechanism 2123 and the liquid receiving mechanism 2124 away from below the upper cavity 210. The translational push-pull mechanism 2122 drives the lower cavity 220 to move below the upper cavity 210. Then, the lifting drive mechanism 2113 drives the upper cavity 210 to move downwards closer to the lower cavity 220. Finally, the upper cavity 210 and the lower cavity 220 close together to seal the lithium battery inside.

[0041] In summary and in combination Figure 2 The working principle of the isobaric injection machine 100 of the present invention is described below:

[0042] During operation, the feeding and conveying device 1 transports the lithium battery casings forward, and the first scanning device 11 scans the graphic code on the surface of the lithium battery casings and records the information in the system. Then, the voltage testing device 13 performs a voltage test on the lithium battery casings. Next, the first moving robot arm 41 transfers the lithium battery casings to the first weighing device 12 for weighing. When the voltage test and weighing of the lithium battery casings are qualified, the first moving robot arm 41 transfers the lithium battery casings to the lower cavity 220, which is waiting at the loading / unloading station 101. When at least one of the voltage test and weighing of the lithium battery casings is unqualified, the first moving robot arm 41 transfers the lithium battery casings to the first unqualified station 14. When the lower cavity 220 is full of lithium battery casings, the clamp residual liquid cleaning device 21 pulls the lower cavity 220 back below the upper cavity 210 and drives the cleaned upper cavity 210 to close with the lower cavity 220. Then, the circulating transfer device 2 moves the isobaric clamp 200 a certain distance, positioning it on the locking drive device 24. The locking drive device 24 then locks the upper cavity 210 and the lower cavity 220 together. Afterward, the circulating transfer device 2 moves the isobaric clamp 200 below the vacuum detection device 26. The vacuum detection device performs a vacuum test on the inside of the isobaric clamp 200. Once the test is passed, the circulating transfer device 2 moves the isobaric clamp 200 below the vacuum injection device 22, which injects liquid into the lithium battery casing inside the isobaric clamp 200. Afterward, the circulating transfer device 2 moves the isobaric clamp 200 to the positive and negative pressure supply device 23, which simultaneously supplies positive or negative pressure to the inside of the isobaric clamp 200 and the inside of the lithium battery to allow the lithium battery to settle at an isobaric pressure. Accordingly, the circulating transfer device 2 drives the isobaric clamp 200 to a plurality of positive and negative pressure supply devices 23 for resting. Finally, the isobaric clamp 200 reaches the unlocking drive device 25, which locks the upper cavity 210 and lower cavity 220 of the isobaric clamp 200. Afterward, the circulating transfer device 2 drives the isobaric clamp 200 back to the clamp residual liquid cleaning device 21. The clamp residual liquid cleaning device 21 separates the upper cavity 210 and lower cavity 220, cleans the upper cavity 210, and transports the lower cavity 220 to the loading / unloading station 101. At this time, the second moving robot 42 transfers the lithium battery located at the loading / unloading station 101 to the unloading conveyor 3. The unloading conveyor 3 drives the lithium battery to move in the unloading direction. During the unloading process, the lithium battery passes through the second scanning device 31, which scans the graphic code of the lithium battery and records the information to the system. Then, the third moving manipulator 43 transfers the lithium battery to the second weighing device 32 for weighing.If the weighing is qualified, the third moving robot 43 transfers the lithium battery to the unloading conveyor 3 for further unloading. If the weighed weight is lower than the normal weight of a lithium battery, the third moving robot 43 transfers the lithium battery to the replenishing device 33. After the replenishing device 33 replenishes the lithium battery with electrolyte, the third moving robot 43 transfers the lithium battery to the second weighing device 32 for weighing, until the lithium battery is qualified. If the weighed weight is higher than the normal weight of a lithium battery, the third moving robot 43 transfers the lithium battery to the second unqualified station 35. Afterwards, the lithium battery passes through the dripping cleaning liquid mechanism 361, which drips cleaning liquid onto the lithium battery's filling port. Then, the wet wiping mechanism 362 wipes away the cleaning liquid and residual liquid, followed by the dry wiping mechanism 363 drying the residual liquid at the lithium battery's filling port. Finally, the pin insertion device inserts a pin into the lithium battery's filling port to seal it and prevent electrolyte leakage. Finally, a CCD device is used to check if the lithium battery pins are correct. If they are incorrect, another robotic arm removes the lithium battery and places it on another defective station. If they are correct, the battery is unloaded.

[0043] Compared with the prior art, this invention achieves automatic feeding and unloading of lithium batteries by arranging the feeding conveyor 1 and unloading conveyor 3 in a straight line. The feeding conveyor 1 is equipped with a first scanning device 11 and a first weighing device 12, while the unloading conveyor 3 is equipped with a second scanning device 31, a second weighing device 32, a liquid replenishment device 33, and a pin insertion device 34. Furthermore, during unloading, unqualified lithium batteries can be automatically replenished with liquid and pinned. In addition, a circulating transfer device 2 is provided, on which a fixture residual liquid cleaning device 21, a vacuum liquid injection device 22, and multiple positive and negative pressure supply devices 23 are sequentially arranged. This allows for cleaning of the fixtures and vacuum liquid injection and positive and negative pressure settling of the lithium batteries. The U-shaped flow pattern of the circulating transfer device 2 avoids excessively long production lines, effectively utilizes the horizontal and vertical space of the production workshop, and improves the compactness and rationality of the equipment structure and layout. Furthermore, by installing a three-moving robot 4 between the feeding conveyor 1, the unloading conveyor 3, and the circulating transfer device 2, the first moving robot 41 enables automatic feeding of lithium battery casings between the feeding conveyor 1 and the circulating transfer device 2, the second moving robot 42 enables automatic unloading of lithium batteries between the unloading conveyor 3 and the circulating transfer device 2, and the third moving robot 43 enables the transfer of lithium batteries between the weighing device and the liquid replenishment device 33. The three moving robots can work synchronously without interfering with each other, thus achieving fully automated production without the need for manual operation, greatly improving work efficiency. Moreover, the use of the isobaric clamp 200 and the positive and negative pressure supply device 23 for isobaric liquid injection and isobaric static setting of lithium batteries results in excellent liquid injection effect, which is beneficial to reducing production costs overall.

[0044] The structures of other components involved in the isobaric injection machine 100 of this invention are well known to those skilled in the art and will not be described in detail here.

[0045] The above-disclosed examples are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention shall still fall within the scope of the present invention.

Claims

1. An isobaric liquid injection machine, characterized in that, include: A feeding and conveying device is used to input lithium battery casings; and the feeding and conveying device is provided with a first barcode scanning device and a first weighing device in sequence along the conveying direction. The first barcode scanning device scans and records the graphic code on the lithium battery casing; the first weighing device weighs the lithium battery casing. A circulating transfer device is used for circulatingly conveying isobaric fixtures capable of loading lithium battery casings. The circulating transfer device is sequentially equipped with a fixture residual liquid cleaning device, a vacuum injection device, and multiple positive and negative pressure supply devices. The fixture residual liquid cleaning device can separate or combine the upper and lower cavities of the isobaric fixture, push the lower cavity to the loading / unloading station, and clean residual liquid from the upper cavity. The vacuum injection device is located above the circulating transfer device and can vacuum-inject lithium battery casings into the isobaric fixture. The positive and negative pressure supply devices are located above the circulating transfer device and can simultaneously introduce positive or negative pressure into the interior and exterior of the injected lithium batteries within the isobaric fixture for settling. The unloading conveyor is arranged in a straight line with the loading conveyor and is used to output the lithium batteries after liquid injection. The unloading conveyor is equipped with a second barcode scanning device, a second weighing device, a liquid replenishment device, and a pin insertion device in sequence along the conveying direction. The second barcode scanning device scans and records the graphic code on the lithium battery casing; the second weighing device weighs the lithium battery casing; the liquid replenishment device replenishes liquid for lithium batteries that fail to meet the weight requirements; and the pin insertion device inserts a pin into the liquid injection port of the lithium battery. A three-moving robotic arm is positioned between the loading conveyor and the unloading conveyor, and between the circulating transfer device and the loading / unloading station. The first moving part of the three-moving robotic arm is used to transfer lithium battery casings from the loading conveyor to the lower cavity located at the loading / unloading station. The second moving part of the three-moving robotic arm is used to transfer lithium batteries located in the lower cavity of the loading / unloading station to the unloading conveyor. The third moving part of the three-moving robotic arm is used to transfer lithium batteries that fail to meet the weighing requirements between the weighing device and the liquid replenishment device. The clamp residual liquid cleaning device includes an upper chamber cleaning device and a lower chamber liquid receiving device. The upper chamber cleaning device includes a fixed bracket, a lifting bracket, a lifting drive mechanism, a docking mechanism, and a moving drive mechanism. The lifting bracket is slidably mounted on the fixed bracket and has a first engaging member at its lower end that can engage with the engaging groove of the upper chamber of the isobaric clamp. The first engaging member has a T-shaped structure, and the engaging groove of the upper chamber of the isobaric clamp is a T-shaped groove. The lifting drive mechanism is mounted on the fixed bracket and its output end is connected to the lifting bracket to drive the lifting bracket to move up and down. The moving drive mechanism is mounted on the fixed bracket and... The output end is connected to the docking mechanism to drive the docking mechanism to communicate with the air port of the upper cavity of the isobaric fixture; the lower cavity liquid receiving device includes a base, a translational push-pull mechanism, a lifting mechanism and a liquid receiving mechanism, the translational push-pull mechanism is disposed on the base and the telescopic end is provided with a second engaging member that can engage with the engaging groove of the lower cavity of the isobaric fixture; the second engaging member has a T-shaped structure and the engaging groove of the lower cavity of the isobaric fixture has a T-shaped groove; the liquid receiving mechanism is disposed at the output end of the lifting mechanism and the lifting mechanism is disposed at the telescopic end of the translational push-pull mechanism to push the liquid receiving mechanism to communicate with the upper cavity of the isobaric fixture.

2. The isobaric injection machine as described in claim 1, characterized in that: The isobaric liquid injection machine also includes a wiping device, which is disposed between the liquid replenishment device and the pin insertion device to remove residual liquid near the lithium battery injection port.

3. The isobaric injection machine as described in claim 2, characterized in that: The wiping device includes a wet wiping mechanism and a dry wiping mechanism arranged in sequence. The wet wiping mechanism is used to absorb most of the residual liquid, and the dry wiping mechanism is used to dry the residual liquid at the lithium battery filling port.

4. The isobaric injection machine as described in claim 3, characterized in that: The wiping device includes a cleaning liquid dripping mechanism disposed before the wet wiping mechanism, which drips cleaning liquid onto the residual liquid to dilute or dissolve the residual liquid.

5. The isobaric injection machine as described in claim 1, characterized in that: A voltage testing device is also provided between the first scanning device and the first weighing device, which is used to perform leakage current testing on the lithium battery.

6. The isobaric injection machine as described in claim 1, characterized in that: The first weighing device has a first defective station on one side, and the first moving robot can transfer the lithium battery casing that fails to meet the weight requirements to the first defective station; the second weighing device has a second defective station on one side, and the third moving robot can transfer the lithium battery that fails to meet the weight requirements to the second defective station.

7. The isobaric injection machine as described in claim 1, characterized in that: The circulating transfer device is equipped with a locking drive device and an unlocking drive device. The locking drive device is located before the vacuum injection device and locks the upper and lower cavities of the isobaric fixture. The unlocking drive device is located on the circulating transfer device and after the last positive and negative pressure supply device and unlocks the upper and lower cavities of the isobaric fixture.

8. The isobaric injection machine as described in claim 1, characterized in that: The lifting bracket includes two pairs of connecting rods and a connecting frame symmetrically arranged on both sides of the fixed bracket. The connecting rods are slidably sleeved on the sliding sleeve of the fixed bracket. The lower end of the connecting rod is provided with the first engaging member. When the isobaric clamp moves toward the upper cavity cleaning device, the engaging groove of the upper cavity engages with the first engaging member.

9. The isobaric injection machine as described in claim 1, characterized in that: The lower cavity liquid receiving device also includes a pushing mechanism, which is located at the telescopic end of the translational push-pull mechanism, and the output end of the pushing mechanism is connected to the lifting mechanism. The pushing direction of the pushing mechanism is the same as the telescopic direction of the translational push-pull mechanism.

Images