Liquid injection equipment for soft package battery

Abstract

The invention discloses soft package battery liquid injection equipment, which comprises a clamp, a push-pull mechanism, a turntable, a turntable driving mechanism and a liquid injection device, the turntable driving mechanism drives the turntable to rotate around the central axis of the turntable, one side of the turntable is provided with a liquid injection station, and the other side of the turntable is provided with a loading and unloading station; the clamps are uniformly arranged on the turntable around the central axis of the turntable; the liquid injection device is arranged on the liquid injection station so as to inject liquid into the soft package battery on the clamp; and the push-pull mechanism is arranged on one side of the liquid injection station to drive the clamping plate of the clamp to move, so that the clamping plate moves back and forth between clamping the soft package battery and loosening the soft package battery, and further flaps the soft package battery. According to the liquid injection equipment for the soft package battery, the battery air bag can be clamped and loosened in the liquid injection process of the battery, electrolyte descending is accelerated, the infiltration effect is improved, a battery cell is prevented from being polluted by overflowed liquid, and the liquid injection quality of the battery is guaranteed.

Description

Technical Field

[0001] This invention relates to a battery production equipment, and more particularly to a liquid injection equipment for pouch batteries. Background Technology

[0002] Electrolyte injection is a crucial step in lithium battery production. Currently, it involves automatically injecting electrolyte into the battery cell using injection equipment. After the cell is fully immersed, subsequent formation and charging / discharging processes are performed to achieve the desired functionality. However, in the current process of injecting electrolyte into consumer-grade pouch batteries, the battery needs to be clamped to maintain its position. This clamping can cause the injected electrolyte to remain above the air bag, preventing it from flowing down into the battery body. Alternatively, after injection, the air bag may still contain numerous air bubbles. This not only affects the immersion effect but also leads to overfilling of the air bag with electrolyte, causing overflow and contamination of the battery cell. This negatively impacts the equipment's packaging performance, ultimately affecting the battery's quality and appearance. Summary of the Invention

[0003] The purpose of this invention is to provide a soft-pack battery electrolyte filling device that can clamp and loosen the battery air bag during the battery electrolyte filling process, accelerate the descent of electrolyte, improve the wetting effect, avoid overflow and contamination of the battery cell, and ensure the quality of battery electrolyte filling.

[0004] To achieve the above objectives, the present invention provides a soft-pack battery electrolyte injection device, including a clamp, a push-pull mechanism, a turntable, a turntable drive mechanism, and an injection device. The turntable drive mechanism drives the turntable to rotate around its central axis. One side of the turntable is provided with an injection station, and the other side of the turntable is provided with a loading and unloading station. The clamp is evenly arranged on the turntable around the central axis of the turntable. The injection device is disposed at the injection station to inject electrolyte into the soft-pack batteries on the clamp. The push-pull mechanism is disposed on one side of the injection station to drive the clamping plate of the clamp to move, so that the clamping plate moves back and forth between clamping and releasing the soft-pack battery, thereby tapping the soft-pack battery. Compared to existing technologies, this invention, by incorporating a push-pull mechanism, drives the clamping plates of the fixture to move back and forth between clamping and releasing the pouch battery. This taps the pouch battery, loosening its bottom body and causing it to vibrate. This vibration expels air bubbles from the bottom body, accelerates the descent of the electrolyte, and allows the electrolyte to effectively fill the bottom body, significantly improving the wetting effect. Furthermore, after each metered electrolyte injection, the bottom body is completely filled with electrolyte, preventing electrolyte overflow and contamination of the battery cell, thus ensuring the quality of the battery electrolyte injection.

[0005] Preferably, the clamp includes a frame, a first clamping plate, and a second clamping plate. The first and second clamping plates are movably disposed within the frame, forming an accommodating area for the pouch battery. By using the first and second clamping plates to hold the pouch battery, the pouch battery can be accurately positioned. Furthermore, the push-pull mechanism drives the two clamping plates, achieving both loosening and clamping of the pouch battery. This facilitates loading and unloading operations and also allows for tapping the pouch battery to accelerate the electrolyte injection process.

[0006] Specifically, the push-pull mechanism has a first output end and a second output end. The first output end is connected to the first clamping plate, and the second output end is connected to the second clamping plate. The output directions of the first and second output ends are opposite, so as to drive the first and second clamping plates to move in opposite directions. Since the movement directions of the first and second clamping plates are opposite, by setting the first and second output ends, the movement of the two clamping plates can be controlled independently, thereby achieving the purpose of clamping or releasing the soft-pack battery.

[0007] Specifically, support rods are provided on both sides of the frame, and the ends of the first and second clamping plates are slidably fitted onto the support rods. The support rods can both provide support for the first and second clamping plates and serve as sliding guides for them.

[0008] Specifically, the clamp further includes a first return spring and a second return spring. The first return spring is disposed between the frame and the first clamping plate to provide an elastic force for the first clamping plate to clamp the pouch battery. The second return spring is disposed between the frame and the second clamping plate to provide an elastic force for the second clamping plate to clamp the pouch battery. By utilizing the first and second return springs, the first and second clamping plates can automatically clamp the pouch battery, thereby reducing the number of driving devices, simplifying the equipment structure, and making control simpler and more convenient.

[0009] Specifically, the first clamping plate is provided with a pull rod, which is connected to the first output end; the second clamping plate is provided with a push rod, which is connected to the second output end. The pull rod and push rod facilitate connection with the push-pull mechanism to transmit driving force to the clamping plates within the fixture, thereby enabling the movement of the clamping plates.

[0010] Specifically, the frame includes a support bracket, a tray at its bottom, an adjusting screw on the support bracket, and a nut on the tray, all threadedly connected to the adjusting screw. By installing a support bracket on the frame and an adjusting screw on the support bracket, the tray can be connected to the adjusting screw, allowing the height of the tray relative to the frame to be adjusted. This makes the clamp suitable for pouch batteries of different sizes, improving the applicability of the device.

[0011] Specifically, the push-pull mechanism includes a frame, a lifting cylinder, a lifting frame, a first cylinder, a second cylinder, and a connector. The lifting cylinder is mounted on the frame and its output end is connected to the lifting frame to drive the lifting frame to move up and down. The first cylinder and the second cylinder are respectively mounted on the lifting frame. The output end of the first cylinder is connected to the connector, which forms the first output end and can be engaged with the pull rod when it rises to its highest point. The output end of the second cylinder forms the second output end and can be engaged with the push rod when it rises to its highest point. By using the lifting cylinder to drive the lifting frame to rise or fall, the first cylinder, the second cylinder, and the connector can rise and fall synchronously to achieve accurate alignment and connection with the clamp.

[0012] Specifically, the end of the pull rod has a T-shaped head, and the connecting head has a T-shaped groove that runs vertically through the rod. When the connecting head rises to its highest point, the T-shaped head enters the T-shaped groove, connecting the connecting head to the T-shaped head. By providing a T-shaped groove on the connecting head, the connecting head can automatically connect to the pull rod when rising, thereby achieving axial tension on the pull rod and ensuring that the push-pull mechanism effectively drives the pull rod.

[0013] Preferably, the turntable has concentrically arranged driven gears, and the turntable drive mechanism includes a servo motor, a reduction mechanism, and a drive gear. The output end of the servo motor is connected to the input end of the reduction mechanism, and the output end of the reduction mechanism is connected to the drive gear. The drive gear meshes with the driven gear. By using a servo motor to drive the turntable, the turntable can achieve step-by-step rotation, thereby driving the fixture to different workstations for processing pouch batteries. Attached Figure Description

[0014] Figure 1 This is a perspective view of the liquid injection device for soft-pack batteries of the present invention.

[0015] Figure 2 This is a top view of the soft-pack battery liquid injection device of the present invention.

[0016] Figure 3 This is a side view of the liquid injection device for soft-pack batteries of the present invention.

[0017] Figure 4 This is a bottom-view perspective view of the liquid injection device for soft-pack batteries of the present invention.

[0018] Figure 5 This is a perspective view of the clamp of the soft-pack battery liquid injection device of the present invention.

[0019] Figure 6 This is a top view of the clamp of the soft-pack battery liquid injection device of the present invention.

[0020] Figure 7 This is a side view of the clamp of the soft-pack battery liquid injection device of the present invention.

[0021] Figure 8 This is a perspective view of the push-pull mechanism of the soft-pack battery liquid injection device of the present invention.

[0022] Figure 9 This is a top view of the push-pull mechanism of the soft-pack battery liquid injection device of the present invention. Detailed Implementation

[0023] To illustrate the technical content, structural features, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0024] Please see Figures 1 to 4 The soft-pack battery liquid injection device 100 of the present invention includes a clamp 1, a push-pull mechanism 2, a turntable 3, a turntable drive mechanism 4, and an injection device 5. The turntable drive mechanism 4 drives the turntable 3 to rotate around its central axis. One side of the turntable 3 is provided with an injection station 101, and the other side of the turntable 3 is provided with a loading / unloading station 102. In this embodiment, the turntable 3 has four stations, two of which are the injection station 101 and the loading / unloading station 102, and the other two are stationary stations 103. The four stations are evenly arranged around the center of the turntable 3. The loading / unloading station 102 is also provided with a clamp switch device 6, which can drive the clamping plate on the clamp 1 to move, thereby clamping or releasing the soft-pack battery 200. In this embodiment, the clamp switch device 6 can adopt the same structure as the push-pull mechanism 2 to release the soft-pack battery 200. The four clamps 1 are evenly arranged on the turntable 3 around the central axis of the turntable 3. The liquid injection device 5 is disposed on the liquid injection station 101 to inject liquid into the soft-pack battery 200 on the clamp 1; the push-pull mechanism 2 is disposed on one side of the liquid injection station 101 to drive the clamping plate of the clamp 1 to move, so that the clamping plate moves back and forth between clamping the soft-pack battery 200 and releasing the soft-pack battery 200, thereby tapping the soft-pack battery 200. Specifically, as follows: Please see Figures 5 to 7The clamp 1 includes a frame 11, a first clamping plate 12, and a second clamping plate 13. The frame 11 has a cuboid structure and an opening on its upper side. The first clamping plate 12 and the second clamping plate 13 are movably disposed within the frame 11, forming an accommodating area 1a for accommodating the pouch battery 200 between them. The push-pull mechanism 2 is connected to the first clamping plate 12 and the second clamping plate 13 to drive them to move synchronously in opposite directions. By setting the first clamping plate 12 and the second clamping plate 13, the pouch battery 200 is clamped, thereby enabling accurate positioning of the pouch battery 200. Furthermore, by combining the push-pull mechanism 2 with the two clamping plates, the pouch battery 200 can be loosened and clamped, which facilitates loading and unloading operations and also allows for tapping the pouch battery 200 to accelerate the liquid injection speed. Support rods 14 are provided on both sides of the frame 11, and the two support rods 14 are arranged in parallel. The two ends of the first clamping plate 12 and the second clamping plate 13 are slidably sleeved on the support rods 14. The support rods 14 can provide support for the first clamping plate 12 and the second clamping plate 13, and can also serve as sliding guides for the first clamping plate 12 and the second clamping plate 13. The clamp 1 also includes a first return spring 15 and a second return spring 16. There are two first return springs 15, which are arranged on the side of the first clamping plate 12 facing away from the receiving area 1a. The first return springs 15 are sleeved on the support rods 14, and the first return springs 15 elastically abut against the frame 11 and the first clamping plate 12 to provide an elastic force for the first clamping plate 12 to clamp the soft pack battery 200. Two second return springs 16 are arranged on the side of the second clamping plate 13 facing away from the receiving area 1a. The second return springs 16 elastically abut against the frame 11 and the second clamping plate 13 to provide an elastic force for the second clamping plate 13 to clamp the pouch battery 200. By using the first return springs 15 and the second return springs 16, the first clamping plate 12 and the second clamping plate 13 can automatically clamp the pouch battery 200, thereby reducing the number of drive devices, simplifying the structure of the device, and making control simpler and more convenient.

[0025] Please see again Figures 5 to 8The push-pull mechanism 2 has a first output end and a second output end. There are two first output ends and one second output end. The first output end is connected to the first clamping plate 12, and the second output end is connected to the second clamping plate 13. The output directions of the first and second output ends are opposite, driving the first clamping plate 12 and the second clamping plate 13 to move in opposite directions. Since the movement directions of the first clamping plate 12 and the second clamping plate are opposite, by setting the first and second output ends, the movement of the two clamping plates can be controlled independently, thereby achieving the purpose of clamping or releasing the soft-pack battery 200. Specifically, the first clamping plate 12 has pull rods 17 perpendicular to the surface of the first clamping plate 12 at both ends on the side facing away from the receiving area 1a. The pull rods 17 freely pass through the frame 11 and extend outwards, connecting to the corresponding first output end on that side. A push rod 18 perpendicular to the surface of the second clamping plate 13 is provided in the middle of the side of the second clamping plate 13 facing away from the receiving area 1a. The push rod 18 is located between the two pull rods 17. The push rod 18 extends freely through the frame 11 and can be connected to the second output end. The pull rod 17 and the push rod 18 are provided to facilitate connection with the push-pull mechanism 2 so as to transmit the driving force to the clamping plate in the clamp 1 to realize the movement of the clamping plate.

[0026] For example Figures 5 to 7 As shown, a bracket 111 is provided inside the frame 11, and the bracket 111 is located in the middle of the frame 11. A support plate 112 is provided at the bottom of the frame 11. An adjusting screw 19 is provided on the bracket 111, and a nut is provided on the support plate 112. The nut is threadedly connected to the adjusting screw 19. The upper end of the adjusting screw 19 protrudes from the surface of the bracket 111 so that the height of the support plate 112 can be adjusted by rotating the screw. By setting the bracket 111 on the frame 11 and setting the adjusting screw 19 on the bracket 111, the support plate 112 is connected to the adjusting screw 19. Thus, the height of the support plate 112 relative to the frame 11 can be adjusted by using the adjusting screw 19, so that the clamp 1 can be used to accommodate soft-pack batteries 200 of different sizes, thereby improving the applicability of the device.

[0027] Please see Figure 5 and Figure 6 In another preferred embodiment, the first clamping plate 12 and the second clamping plate 13 form a set of clamping plates, and two sets of clamping plates are symmetrically arranged on the frame 11, with the two sets of clamping plates located on opposite sides of the bracket 111. Two push-pull mechanisms 2 are provided, each located on one side of the frame 11, to drive the corresponding set of clamping plates. By providing two sets of clamping plates, the clamp 1 can simultaneously accommodate more pouch batteries 200, thereby improving processing efficiency.

[0028] Please see Figures 8 to 9 The push-pull mechanism 2 includes a frame 21, a lifting cylinder 22, a lifting frame 23, a first cylinder 24, a second cylinder 25, and a connector 26. The lifting cylinder 22 is mounted on the frame 21 with its output end facing upward and connected to the lifting frame 23 to drive the lifting frame 23 to rise and fall. The lifting bracket 111 is mounted on the frame 21 via a slide rail and a slider. The first cylinder 24 and the second cylinder 25 are arranged horizontally on the lifting frame 23. There are two first cylinders 24, and the output ends of both first cylinders 24 are connected to the same connecting plate 27. The connecting plate 27 is connected to the connector 26, and there are two connectors 26, located at opposite ends of the same side of the connecting plate 27. The two first cylinders 24 extend and retract synchronously. The connector 26 forms the first output end and can be connected to the pull rod 17 when the lifting frame 23 rises to its highest point. The second cylinder 25 is located between the two first cylinders 24. The output end of the second cylinder 25 extends outward through the connecting plate 27 to form the second output end, and abuts against the push rod 18 when the lifting frame 23 rises to its highest point. By using the lifting cylinder 22 to drive the lifting frame 23 to rise or fall, the first cylinder 24, the second cylinder 25, and the connector 26 can rise and fall synchronously to accurately align and connect with the clamp 1. More specifically, the end of the pull rod 17 has a T-shaped head 171, and the connector 26 has a T-shaped groove 261 that runs vertically through the top and bottom. When the connector 26 rises to its highest point, the T-shaped head 171 enters the T-shaped groove 261, connecting the connector 26 with the T-shaped head 171. By providing a T-slot 261 on the connector 26, the connector 26 can automatically connect with the pull rod 17 when it rises, thereby achieving axial stretching of the pull rod 17 and ensuring that the push-pull mechanism 2 effectively drives the pull rod 17.

[0029] As shown in Figure 4, the turntable 3 is concentrically equipped with driven gears 31. The turntable drive mechanism 4 includes a servo motor, a reduction mechanism, and a drive gear. The output end of the servo motor is connected to the input end of the reduction mechanism, and the output end of the reduction mechanism is connected to the drive gear. The drive gear meshes with the driven gears 31. By using the servo motor to drive the turntable 3, the turntable 3 can achieve step-by-step rotation, thereby driving the fixture 1 to different workstations to process the pouch battery 200.

[0030] Based on the above and in conjunction with the accompanying drawings, the working principle of the soft-pack battery liquid injection device 100 of the present invention will be described in detail below: During liquid injection, the turntable drive mechanism 4 drives the clamp 1 on the turntable 3 to rotate to the loading / unloading station 102. At this time, the clamp switch device 6 loads the clamp 1 on the loading / unloading station 102, so that the clamp 1 holds the soft-pack battery 200. Then, the turntable drive mechanism 4 drives the turntable 3 to rotate 90 degrees, so that the clamp 1 that has just been loaded rotates to the liquid injection station 101. At this time, the liquid injection device 5 injects liquid into the soft-pack battery 200. At the same time, the lifting cylinder 22 on the push-pull mechanism 2 starts, driving the lifting frame 23 to rise. When it rises to the highest point, the lifting cylinder 22 stops running, and the output end of the first cylinder 24 and the output end of the second cylinder 25 are respectively aligned with the pull rod 17 and the push rod 18, and the T-shaped head 171 enters the T-shaped groove 261 of the connector 26, and the two cooperate and connect with each other. At this time, the first cylinder 24 starts and retracts, thereby driving the first clamping plate 12 away from the soft-pack battery 200 via the pull rod 17. Simultaneously, the second cylinder 25 starts and extends, thereby driving the second clamping plate 13 away from the soft-pack battery 200 via the push rod 18, achieving the purpose of releasing the soft-pack battery 200. When the output ends of the first cylinder 24 and the second cylinder 25 move in opposite directions, under the elastic force of the first return spring 15 and the second return spring 16, the first clamping plate 12 and the second clamping plate 13 clamp the soft-pack battery 200 again. By repeatedly controlling the extension and retraction of the first cylinder 24 and the second cylinder 25, the first clamping plate 12 and the second clamping plate 13 continuously switch between clamping and releasing the soft-pack battery 200, thereby achieving the purpose of tapping the soft-pack battery 200. When the soft-pack battery 200 is continuously tapped, the air bubbles in the air bag will be discharged outwards, and the electrolyte can be filled into the cylinder. During the liquid injection process, the loading and unloading station 102 simultaneously loads another clamp 1 on the same station. After the liquid injection is completed, the turntable 3 driving device drives the turntable 3 to rotate 90 degrees, so that the clamp 1 located on the liquid injection station 101 is placed on the stationary station 103, while the other clamp 1 located on the loading and unloading station 102 is transferred to the liquid injection station 101. In this way, continuous liquid injection operations can be achieved.

[0031] Compared with existing technologies, this invention, by setting up a push-pull mechanism 2, drives the clamping plate of the fixture 1 to move back and forth between clamping and releasing the soft-pack battery 200. This allows the soft-pack battery 200 to be tapped, thereby relaxing the bottom body of the soft-pack battery 200. This vibration causes air bubbles to be expelled from the bottom body, accelerating the descent of the electrolyte. The electrolyte can effectively fill the bottom body, significantly improving the wetting effect. Furthermore, after each metered injection, the electrolyte completely fills the bottom body, preventing electrolyte overflow and contamination of the battery cell, thus ensuring the quality of the battery electrolyte injection.

[0032] The structure of the liquid injection device 5 and the clamp switch device 6 involved in the soft-pack battery liquid injection equipment 100 of the present invention is not the focus of protection of this solution, and their specific structures are well known to those skilled in the art, and will not be described in detail here.

[0033] The above-disclosed embodiments 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 scope of the present invention are still within the scope of the present invention.

Claims

1. A liquid injection device for soft-pack batteries, characterized in that: The device includes a clamp, a push-pull mechanism, a turntable, a turntable drive mechanism, and a liquid injection device. The turntable drive mechanism drives the turntable to rotate around its central axis. One side of the turntable has a liquid injection station, and the other side has a loading and unloading station. The clamp is evenly arranged on the turntable around its central axis. The liquid injection device is located at the liquid injection station to inject liquid into the pouch batteries on the clamp. The push-pull mechanism is located on one side of the liquid injection station to drive the clamping plate of the clamp to move, so that the clamping plate moves back and forth between clamping and releasing the pouch batteries, thereby tapping the pouch batteries.

2. The soft-pack battery liquid injection device according to claim 1, characterized in that: The clamp includes a frame, a first clamping plate, and a second clamping plate. The first clamping plate and the second clamping plate are movably disposed within the frame, and a receiving area for accommodating the soft-pack battery is formed between the first clamping plate and the second clamping plate.

3. The soft-pack battery liquid injection device according to claim 2, characterized in that: The push-pull mechanism has a first output end and a second output end. The first output end is connected to the first clamping plate, and the second output end is connected to the second clamping plate. The output directions of the first output end and the second output end are opposite, so as to drive the first clamping plate and the second clamping plate to move in opposite directions.

4. The soft-pack battery liquid injection device according to claim 2, characterized in that: Support rods are provided on both sides of the frame, and the two ends of the first clamping plate and the second clamping plate are slidably fitted onto the support rods.

5. The soft-pack battery electrolyte filling device according to claim 3, characterized in that: The clamp further includes a first return spring and a second return spring. The first return spring is disposed between the frame and the first clamping plate to provide an elastic force for the first clamping plate to clamp the soft-pack battery. The second return spring is disposed between the frame and the second clamping plate to provide an elastic force for the second clamping plate to clamp the soft-pack battery.

6. The soft-pack battery liquid injection device according to claim 3, characterized in that: The first clamping plate is provided with a pull rod, which is connected to the first output end. The second clamping plate is provided with a push rod, which is connected to the second output end.

7. The soft-pack battery electrolyte filling device according to claim 2, characterized in that: The frame is equipped with a bracket, the bottom of the frame is equipped with a support plate, the bracket is equipped with an adjusting screw, the support plate is equipped with a nut, and the nut is threadedly connected to the adjusting screw.

8. The soft-pack battery electrolyte filling device according to claim 6, characterized in that: The push-pull mechanism includes a frame, a lifting cylinder, a lifting frame, a first cylinder, a second cylinder, and a connector. The lifting cylinder is mounted on the frame and its output end is connected to the lifting frame to drive the lifting frame to move up and down. The first cylinder and the second cylinder are respectively mounted on the lifting frame. The output end of the first cylinder is connected to the connector. The connector forms the first output end and can be connected to the pull rod when it rises to the highest point. The output end of the second cylinder forms the second output end and can be connected to the push rod when it rises to the highest point.

9. The soft-pack battery electrolyte filling device according to claim 8, characterized in that: The end of the pull rod has a T-shaped head, and the connector head has a T-shaped groove that runs through the top and bottom. When the connector head rises to its highest point, the T-shaped head enters the T-shaped groove, so that the connector head is connected to the T-shaped head.

10. The soft-pack battery liquid injection device according to claim 1, characterized in that: The turntable is provided with driven gears concentrically. The turntable drive mechanism includes a servo motor, a reduction mechanism and a drive gear. The output end of the servo motor is connected to the input end of the reduction mechanism, and the output end of the reduction mechanism is connected to the drive gear. The drive gear meshes with the driven gear.

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