Square lithium battery liquid injection and discharge carrying device

Abstract

This invention relates to the technical field of battery transfer equipment, and in particular to a square lithium battery filling and discharging conveying device, which includes a moving unit, a lifting unit on the moving unit, a clamping unit at the lower end of the lifting unit, and a lithium battery storage unit at the lower part of the clamping unit. During the clamping process of the square lithium battery outer packaging, air is blown out through the first and second exhaust ports to keep the square lithium battery outer packaging in an upright position, facilitating subsequent clamping. During the clamping process, after the rubber pad descends and blocks the first exhaust port, the second exhaust port will spray a stronger airflow to ensure that the square lithium battery outer packaging bag is more concentrated and easier to clamp. When the square lithium battery outer packaging bag is clamped by the grippers and rubber pads, due to inertia, when the square lithium battery is thrown out, the two rubber pads will clamp the outer packaging more tightly, reducing the risk of it being thrown out.

Description

Technical Field

[0001] This invention relates to the technical field of battery transfer equipment, and in particular to a square lithium battery liquid filling and discharging handling device. Background Technology

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloys as both positive and negative electrode materials and a non-aqueous electrolyte solution. Lithium batteries can be broadly classified into two categories: lithium metal batteries and lithium-ion batteries. Lithium metal batteries typically use manganese dioxide as the positive electrode material, metallic lithium or its alloys as the negative electrode material, and a non-aqueous electrolyte solution. Lithium-ion batteries, on the other hand, typically use lithium alloy metal oxides as the positive electrode material, graphite as the negative electrode material, and a non-aqueous electrolyte solution. Lithium-ion batteries do not contain metallic lithium and are rechargeable. Pouch batteries are a type of lithium-ion battery. Pouch batteries consist of a liquid lithium-ion battery encased in a polymer shell. Pouch batteries are lightweight and highly safe. Because the polymer shell often uses aluminum-plastic film as the packaging material, the overall weight is relatively light. Furthermore, in the event of a safety hazard, a pouch battery will only swell and crack, not explode, thus offering higher safety.

[0003] A Chinese patent application number CN202411656164.X discloses an automatic feeding device for secondary sealing of square soft-pack lithium batteries, comprising: a pallet conveying plane for conveying battery pallets; a pallet output plane for outputting empty pallets; a transfer device; a picking device; a flipping and clamping device; and a shoveling device; wherein the end of the pallet conveying plane is adjacent to the beginning of the pallet output plane; the transfer device is used to transfer empty battery pallets; the picking device is located near the end of the pallet conveying plane and is used to remove batteries from the pallets; the flipping and clamping device is located near the picking device.

[0004] Square lithium batteries are usually packaged in soft film. Therefore, the outer packaging bag of square lithium batteries is easily damaged during the gripping process. At the same time, during the gripping and transportation process, due to inertia, if the grip is not tight, the square lithium battery and the outer packaging bag can easily be thrown away and detached from the gripper. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a square lithium battery liquid filling and discharging conveying device.

[0006] The square lithium battery liquid filling and discharging conveying device of the present invention includes a moving unit, a lifting unit is provided on the moving unit, a clamping unit is provided at the lower end of the lifting unit, and a lithium battery storage unit is provided at the lower part of the clamping unit. A gripping unit for gripping lithium batteries includes grippers with rubber pads at the ends of the grippers. A lithium battery storage unit for storing lithium batteries after liquid filling is completed includes a placement mold, a clamping groove on the placement mold, a placement groove in the lower middle part of the clamping groove, a first vent in the clamping groove, and a second vent in the placement groove.

[0007] Preferably, the moving unit includes two limiting rails, each with a slider slidably mounted thereon, and each slider has a mounting plate mounted thereon.

[0008] Preferably, a drive motor is provided at the side end of the limiting track, a drive wheel is provided at the output end of the drive motor, a vertical plate is provided at the end of the limiting track away from the drive motor, a driven wheel is rotatably provided on the vertical plate, a conveyor belt is provided between the drive wheel and the driven wheel, a fixing block is provided on the mounting plate, and the conveyor belt passes through the fixing block and is fixed thereto.

[0009] Preferably, the lifting unit includes a lifting plate, on which two first limiting rods are provided, and on the mounting plate are two corresponding first limiting sleeves. The first limiting rods move up and down within the first limiting sleeves, and mounting brackets are provided at the upper ends of the two first limiting rods.

[0010] Preferably, the mounting frame is provided with a first lifting motor, the output end of the first lifting motor is provided with a screw, the mounting plate is provided with a threaded sleeve, the screw and the threaded sleeve are engaged, and the lower end of the screw is rotatably engaged with the lifting plate.

[0011] Preferably, a cylinder is provided at the lower end of the lifting plate, the output end of the cylinder passes through the lifting plate, a telescopic rod is provided at the output end of the cylinder, a connecting plate is provided at the upper end of the telescopic rod, two second limiting rods are provided at the lower end of the connecting plate, two second limiting sleeves are also provided on the lifting plate, the second limiting rods pass through the second limiting sleeves, a horizontal plate is also provided at the lower end of the two second limiting rods, and the clamping unit is provided at the lower end of the horizontal plate.

[0012] Preferably, the clamping unit further includes a mounting block, on which a first air passage and a second air passage are provided. A piston is provided in the second air passage. Limiting rings are provided at both the upper and lower ends of the second air passage. The upper end of the second air passage is connected to the first air passage. An extension rod is provided at the lower end of the piston.

[0013] Preferably, the lower end of the mounting block is provided with a U-shaped groove, the gripper is located in the U-shaped groove, the lower end of the extension rod is rotatably connected to one side of the gripper, an auxiliary rod is provided in the U-shaped groove, and a groove matching the auxiliary rod is provided on the gripper.

[0014] Preferably, connectors are provided on both sides of the mounting block, and the connectors are connected to external air pipes.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting up rubber pads, a first exhaust port, and a second exhaust port, air is blown out through the first and second exhaust ports during the clamping process of the square lithium battery outer packaging to keep the outer packaging of the square lithium battery in an upright position, facilitating subsequent clamping. During the clamping process, after the rubber pad descends and blocks the first exhaust port, the second exhaust port will spray a stronger airflow to ensure that the outer packaging bag of the square lithium battery is more concentrated and easier to clamp. When the outer packaging bag of the square lithium battery is clamped by the grippers and rubber pads, due to the inertia, when the square lithium battery is thrown out, the two rubber pads will clamp the outer packaging more tightly, reducing the risk of it being thrown out and improving the stability of the equipment in transferring and discharging square lithium batteries. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the moving unit of the present invention; Figure 3 This is a schematic diagram of the clamping unit and lifting unit of the present invention; Figure 4 This is a schematic diagram of the gripping unit of the present invention; Figure 5 This is the invention Figure 4 A magnified schematic diagram of the local structure at point A; Figure 6 This is a side view of the mounting block of the present invention; Figure 7 This is a schematic diagram of the structure of the lithium battery storage unit of the present invention; Figure 8 This is the invention Figure 7 A magnified schematic diagram of the structure at point B in the middle.

[0017] Reference numerals: 1. Moving unit; 2. Lifting unit; 3. Clamping unit; 4. Lithium battery storage unit; 101. Limiting track; 102. Slider; 103. Mounting plate; 104. Drive motor; 105. Drive wheel; 106. Vertical plate; 107. Driven wheel; 108. Conveyor belt; 109. Fixing block; 201. Lifting plate; 202. First limiting rod; 203. First limiting sleeve; 204. Mounting bracket; 205. First lifting motor; 206. Screw; 207. Threaded sleeve; 208. Cylinder; 209. 1. Telescopic rod; 210. Connecting plate; 211. Second limiting rod; 212. Second limiting sleeve; 213. Horizontal plate; 301. Gripper; 302. Rubber pad; 303. Mounting block; 304. First air passage; 305. Second air passage; 306. Piston; 307. Limiting ring; 308. Extension rod; 309. U-shaped groove; 310. Auxiliary rod; 311. Groove; 312. Connector; 401. Placement mold; 402. Clamping groove; 403. Placement groove; 404. First exhaust port; 405. Second exhaust port. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0019] Example 1 like Figures 1 to 7 As shown, this invention discloses a square lithium battery liquid injection and discharge conveying device, including a moving unit 1, a lifting unit 2 on the moving unit 1, a clamping unit 3 at the lower end of the lifting unit 2, and a lithium battery storage unit 4 at the lower part of the clamping unit 3. The entire device is installed on a supporting facility, and the device needs to be used in conjunction with the supporting facility. The moving unit 1 and the lifting unit 2 can adjust the clamping unit 3 horizontally and vertically. After the square lithium battery is liquid injected, it will enter the lithium battery storage unit 4 for temporary storage, and then be clamped by the clamping unit 3. After the clamping unit 3 has clamped the battery, the moving unit 1 and the lifting unit 2 work together to transport the lithium battery to the designated position of the next process.

[0020] The moving unit 1 includes a limiting rail 101, and there are two limiting rails 101. A slider 102 is slidably mounted on each of the two limiting rails 101. A mounting plate 103 is mounted on each of the two sliders 102. The limiting rails 101 are mounted on the matching facilities. The sliders 102 can move laterally along the limiting rails 101, thereby adjusting the lateral position of the mounting plate 103.

[0021] A drive motor 104 is provided on the side of the limiting track 101, and a drive wheel 105 is provided at the output end of the drive motor 104. A vertical plate 106 is provided at the end of the limiting track 101 away from the drive motor 104. A driven wheel 107 is rotatably mounted on the vertical plate 106. A conveyor belt 108 is provided between the drive wheel 105 and the driven wheel 107. A fixing block 109 is provided on the mounting plate 103. The conveyor belt 108 passes through the fixing block 109 and is fixed thereto. After the drive motor 104 is started, the output end of the drive motor 104 drives the drive wheel 105 to rotate. The rotation of the drive wheel 105 will drive the rotation of the conveyor belt 108. During the rotation of the conveyor belt 108, it cooperates with the fixing block 109, thereby driving the movement of the mounting plate 103. The lateral movement of the mounting plate 103 is controlled by the drive motor 104, making the movement of the mounting plate 103 more convenient and controllable.

[0022] The lifting unit 2 includes a lifting plate 201, on which two first limiting rods 202 are provided. Two corresponding first limiting sleeves 203 are provided on the mounting plate 103. The first limiting rods 202 move up and down within the first limiting sleeves 203. A mounting bracket 204 is provided at the upper end of the two first limiting rods 202. A first lifting motor 205 is provided on the mounting bracket 204. A screw 206 is provided at the output end of the first lifting motor 205. A threaded sleeve 207 is provided on the mounting plate 103. The screw 206 engages with the threaded sleeve 207. The lower end of the screw 206 rotates with the lifting plate 201, activating the first limiting rod 202. A lifting motor 205 drives the screw 206 to rotate. During the rotation of the screw 206, it engages with the threaded sleeve 207, causing the first lifting motor 205 and the threaded sleeve 207 to move relative to each other. The first lifting motor 205 is mounted on the mounting bracket 204, and the threaded sleeve 207 is located on the mounting plate 103. Therefore, the mounting plate 103 and the mounting bracket 204 are relatively displaced. During the relative displacement, the first limiting rod 202 and the first limiting sleeve 203 match and limit each other, making the relative displacement of the mounting plate 103 and the mounting bracket 204 more stable.

[0023] A cylinder 208 is provided at the lower end of the lifting plate 201. The output end of the cylinder 208 passes through the lifting plate 201. A telescopic rod 209 is provided at the output end of the cylinder 208. A connecting plate 210 is provided at the upper end of the telescopic rod 209. Two second limiting rods 211 are provided at the lower end of the connecting plate 210. Two second limiting sleeves 212 are also provided on the lifting plate 201. The second limiting rods 211 pass through the second limiting sleeves 212. A horizontal plate 213 is provided at the lower end of the two second limiting rods 211. The clamping unit 3 is located at the lower end of the horizontal plate 213. When the cylinder 208 is activated, the output end of the cylinder 208 drives the telescopic rod 209 to move, thereby causing the connecting plate 210 to rise and fall. During the rising and falling process of the connecting plate 210, the second limiting rods 211 match and limit the movement of the second limiting sleeves 212. When the connecting plate 210 rises and falls, it will drive the horizontal plate 213 to rise and fall through the second limiting rods 211, thereby realizing the vertical position adjustment of the clamping unit 3.

[0024] The gripping unit 3 includes a gripper 301 and a mounting block 303. The mounting block 303 has a first air passage 304 and a second air passage 305. A piston 306 is disposed within the second air passage 305. Limit rings 307 are provided at both the upper and lower ends of the second air passage 305. The upper end of the second air passage 305 communicates with the first air passage 304. An extension rod 308 is provided at the lower end of the piston 306. A U-shaped groove 309 is provided at the lower end of the mounting block 303. The gripper 301 is located within the U-shaped groove 309. The lower end of the extension rod 308 is rotatably connected to one side of the gripper 301. An auxiliary rod 310 is disposed within the U-shaped groove 309. A groove 311 matching the auxiliary rod 310 is provided on the gripper 301. The mounting block 301... 3. Connectors 312 are also provided on both sides. Connectors 312 are connected to external air pipes. When the external air pump delivers air into the first air passage 304 through the air pipe, the air pressure in the first air passage 304 rises. The air pressure in the first air passage 304 acts on the piston 306 in the second air passage 305, causing the piston 306 to move downward. When the piston 306 moves downward, it will drive the extension rod 308 to descend. When the extension rod 308 descends, it will cause the two grippers 301 to open. Conversely, when the external air pump draws air from the first air passage 304 through the air pipe, the air pressure in the first air passage 304 drops, causing the piston 306 to move upward, thereby causing the extension rod 308 to rise and the two grippers 301 to close and clamp.

[0025] The lithium battery storage unit 4 includes a placement mold 401, a clamping groove 402 on the placement mold 401, and a placement groove 403 in the lower middle part of the clamping groove 402. After the square lithium battery is processed by liquid injection, the square lithium battery is covered with a bag and then sent into the placement groove 403 of the lithium battery storage unit 4.

[0026] During the use of this invention, after the square lithium battery is filled with liquid, the square lithium battery is covered with a bag and then sent into the placement slot 403 in the lithium battery storage unit 4.

[0027] Start the drive motor 104. The output of the drive motor 104 drives the drive wheel 105 to rotate. The rotation of the drive wheel 105 drives the conveyor belt 108 to rotate. During the rotation of the conveyor belt 108, it cooperates with the fixed block 109, thereby driving the mounting plate 103 to move.

[0028] The first lifting motor 205 is started, and its output drives the screw 206 to rotate. During the rotation of the screw 206, it engages with the threaded sleeve 207, causing the first lifting motor 205 and the threaded sleeve 207 to move relative to each other. The first lifting motor 205 is mounted on the mounting bracket 204, and the threaded sleeve 207 is located on the mounting plate 103. Therefore, the mounting plate 103 and the mounting bracket 204 are displaced relative to each other, thereby adjusting the longitudinal position of the clamping unit 3 and allowing it to enter the clamping slot 402. Then, the external air pump is started, and the air pipe draws air into the first air passage 304, causing the piston 306 to move upward. When the piston 306 moves upward, the two grippers 301 perform a clamping action. After the grippers 301 clamp the packaging bag of the square lithium battery, the clamping unit 3 is moved to the placement area of ​​the square lithium battery through the cooperation of the first lifting motor 205 and the drive motor 104.

[0029] When placing the square lithium battery, the cylinder 208 is activated. The output end of the cylinder 208 drives the telescopic rod 209 to move, thereby raising and lowering the connecting plate 210. During the raising and lowering process, the second limiting rod 211 matches and limits the second limiting sleeve 212. When the connecting plate 210 is raised and lowered, the second limiting rod 211 will drive the horizontal plate 213 to rise and fall. At the same time, the first lifting motor 205 and the drive motor 104 are activated, so that the two rows of clamping units 3 are placed row by row.

[0030] Example 2 Based on the above-described embodiment 1, a square lithium battery filling and discharging conveying device is used. During operation, the outer packaging bag of the square lithium battery is typically wrapped in soft film. Therefore, the gripper 301 can easily damage the outer packaging bag during gripping. Furthermore, during the gripping and transportation process, due to inertia, if the gripping is not tight, the square lithium battery along with its outer packaging bag can easily be thrown off and detach from the gripper 301. Therefore, the following technical solution is proposed: like Figures 1 to 8As shown, a rubber pad 302 is provided at the end of the gripper 301. During the gripping process of the gripper 301 on the outer packaging bag of the square lithium battery, the rubber pad 302 provides cushioning. On the one hand, it can reduce damage to the outer packaging bag. On the other hand, during the movement, due to the shape limitation of the rubber pad 302, when the outer packaging bag is thrown outward, the two rubber pads 302 will squeeze the outer packaging bag more tightly, thereby reducing the risk of the square lithium battery and the packaging bag being thrown out during the movement.

[0031] The clamping slot 402 is provided with a first exhaust port 404, and the placement slot 403 is provided with a second exhaust port 405. An external air pipe is connected to the first exhaust port 404 and the second exhaust port 405. The external air pipe will continuously supply air, and the first exhaust port 404 and the second exhaust port 405 will continuously blow air upward. Under the action of the air, the outer packaging bag of the square lithium battery can be kept in a vertical position, which makes it convenient for the gripper 301 and the rubber pad 302 to clamp it.

[0032] During use, the external air pipe continuously supplies air to the first exhaust port 404 and the second exhaust port 405. The first exhaust port 404 and the second exhaust port 405 continuously blow air upwards. Under the action of the air, the outer packaging bag of the square lithium battery can be kept in an upright state, which makes it convenient for the gripper 301 and the rubber pad 302 to grip it.

[0033] During the process of gripping the outer packaging of the square lithium battery by the gripping unit 3 descending, as the gripper 301 and the rubber pad 302 descend, the rubber pad 302 gradually blocks the first exhaust port 404. After the first exhaust port 404 is blocked, the airflow ejected from the second exhaust port 405 will be strengthened, thereby making the upper part of the outer packaging bag of the square lithium battery more concentrated, which is convenient for subsequent gripping.

[0034] When the two grippers 301 approach each other, the two rubber pads 302 squeeze and grip the outer packaging bag of the square lithium battery. During the transfer process, the rubber pads 302 help reduce damage to the outer packaging bag of the square lithium battery. At the same time, when the outer packaging bag is gripped and moved, due to inertia, when the outer packaging bag is thrown out, the two rubber pads 302 squeeze the outer packaging bag even tighter, thereby reducing the risk of the square lithium battery and its packaging bag being thrown out during the movement, making the transfer and discharge of the square lithium battery by the equipment more stable.

[0035] The main function achieved by this invention is as follows: By setting up a rubber pad 302, a first exhaust port 404, and a second exhaust port 405, during the clamping process of the outer packaging of the square lithium battery, air is blown out through the first exhaust port 404 and the second exhaust port 405 to keep the outer packaging of the square lithium battery in an upright position, which facilitates subsequent clamping. During the clamping process, after the rubber pad 302 descends and blocks the first exhaust port 404, the second exhaust port 405 will spray out a stronger airflow to ensure that the outer packaging bag of the square lithium battery is more concentrated and easier to clamp. When the outer packaging bag of the square lithium battery is clamped by the gripper 301 and the rubber pad 302, due to the inertia, when the square lithium battery is thrown out, the two rubber pads 302 will clamp the outer packaging more tightly, reducing the risk of it being thrown out and improving the stability of the equipment in transferring and discharging the square lithium battery.

[0036] The square lithium battery liquid filling and discharging conveying device of the present invention can be installed, connected or set in a common mechanical manner, and can be implemented as long as it can achieve its beneficial effect.

[0037] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A square lithium battery liquid injection discharge carrying device, comprising a moving unit (1), characterized in that, The moving unit (1) is provided with a lifting unit (2), the lower end of the lifting unit (2) is provided with a clamping unit (3), and the lower part of the clamping unit (3) is provided with a lithium battery storage unit (4). The clamping unit (3) is used to clamp lithium batteries and includes a gripper (301) with a rubber pad (302) at the end of the gripper (301). A lithium battery storage unit (4) is used to store lithium batteries after liquid injection. It includes a placement mold (401), a clamping groove (402) is provided on the placement mold (401), a placement groove (403) is provided in the lower middle part of the clamping groove (402) of the placement mold (401), a first vent (404) is provided in the clamping groove (402), and a second vent (405) is provided in the placement groove (403). During the gripper (301) grips the outer packaging bag of the square lithium battery, the rubber pad (302) provides cushioning. On the one hand, this reduces damage to the outer packaging bag. On the other hand, during the movement, due to the shape limitation of the rubber pad (302), when the outer packaging bag is thrown outward, the two rubber pads (302) will squeeze the outer packaging bag more tightly, thereby reducing the risk of the square lithium battery and its packaging bag being thrown out during the movement. During the process of gripping the outer packaging of the square lithium battery by the gripping unit (3) descending, as the gripper (301) and the rubber pad (302) descend, the rubber pad (302) gradually blocks the first exhaust port (404). After the first exhaust port (404) is blocked, the airflow ejected from the second exhaust port (405) will be strengthened, thereby making the upper part of the outer packaging bag of the square lithium battery more concentrated, which is convenient for subsequent gripping.

2. The square lithium battery liquid injection discharge carrying device according to claim 1, characterized in that, The moving unit (1) includes a limiting rail (101), and there are two limiting rails (101). A slider (102) is slidably arranged on each of the two limiting rails (101), and an mounting plate (103) is arranged on each of the two sliders (102).

3. The square lithium battery electrolyte filling and discharging conveying device as described in claim 2, characterized in that, A drive motor (104) is provided on the side end of the limiting track (101), and a drive wheel (105) is provided at the output end of the drive motor (104). A vertical plate (106) is provided at the end of the limiting track (101) away from the drive motor (104). A driven wheel (107) is rotatably provided on the vertical plate (106). A conveyor belt (108) is provided between the drive wheel (105) and the driven wheel (107). A fixing block (109) is provided on the mounting plate (103). The conveyor belt (108) passes through the fixing block (109) and is fixed thereto.

4. The square lithium battery electrolyte filling and discharging conveying device as described in claim 2, characterized in that, The lifting unit (2) includes a lifting plate (201), on which two first limiting rods (202) are provided, and on the mounting plate (103) two corresponding first limiting sleeves (203) are provided. The first limiting rods (202) move up and down within the first limiting sleeves (203), and the upper ends of the two first limiting rods (202) are provided with mounting brackets (204).

5. The square lithium battery electrolyte filling and discharging conveying device as described in claim 4, characterized in that, The mounting bracket (204) is provided with a first lifting motor (205), the output end of the first lifting motor (205) is provided with a screw (206), the mounting plate (103) is provided with a threaded sleeve (207), the screw (206) cooperates with the threaded sleeve (207), and the lower end of the screw (206) is rotatably engaged with the lifting plate (201).

6. The square lithium battery electrolyte filling and discharging conveying device as described in claim 4, characterized in that, A cylinder (208) is provided at the lower end of the lifting plate (201). The output end of the cylinder (208) passes through the lifting plate (201). A telescopic rod (209) is provided at the output end of the cylinder (208). A connecting plate (210) is provided at the upper end of the telescopic rod (209). Two second limiting rods (211) are provided at the lower end of the connecting plate (210). Two second limiting sleeves (212) are also provided on the lifting plate (201). The second limiting rods (211) pass through the second limiting sleeves (212). A horizontal plate (213) is also provided at the lower end of the two second limiting rods (211). The clamping unit (3) is located at the lower end of the horizontal plate (213).

7. The square lithium battery electrolyte filling and discharging conveying device as described in claim 1, characterized in that, The clamping unit (3) further includes a mounting block (303), on which a first air passage (304) and a second air passage (305) are provided. A piston (306) is provided in the second air passage (305). Limiting rings (307) are provided at both the upper and lower ends of the second air passage (305). The upper end of the second air passage (305) is connected to the first air passage (304). An extension rod (308) is provided at the lower end of the piston (306).

8. The square lithium battery electrolyte filling and discharging conveying device as described in claim 7, characterized in that, The lower end of the mounting block (303) is provided with a U-shaped groove (309), the gripper (301) is located in the U-shaped groove (309), the lower end of the extension rod (308) is rotatably connected to one side of the gripper (301), an auxiliary rod (310) is provided in the U-shaped groove (309), and a groove (311) matching the auxiliary rod (310) is provided on the gripper (301).

9. The square lithium battery electrolyte filling and discharging conveying device as described in claim 7, characterized in that, The mounting block (303) is also provided with connectors (312) on both sides, and the connectors (312) are connected to the external air pipe.

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