Liquid injection device of flexible package lithium battery

Abstract

The utility model relates to the technical field of lithium battery processing, in particular to a liquid injection device of a flexible package lithium battery, which improves the liquid injection continuity, reduces bubbles, prevents a part of electrolyte from splashing to the outside of the lithium battery, receives and collects the electrolyte, and avoids dripping waste. Comprising a base, a vertical cylinder, a top disc, a height adjusting assembly, a liquid injection assembly, a feeding assembly and a bearing assembly, a plurality of fixing lugs are arranged on the base, the vertical cylinder is connected to the middle of the top end of the base, the top disc is connected to the top end of the vertical cylinder, the height adjusting assembly is installed in the vertical cylinder, the liquid injection assembly is installed at the top of the height adjusting assembly, and the feeding assembly is installed on the outer wall of the top disc; a bearing assembly is installed on the side wall of the front end of the vertical cylinder.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery processing, and in particular to a liquid injection device for soft-pack lithium batteries. Background Technology

[0002] With the development trend of lightweighting and intelligentization in the automotive industry, electronics products, and other fields, soft-pack lithium batteries are becoming increasingly important in people's lives. Soft-pack lithium batteries consist of a positive electrode, a negative electrode, electrolyte, separator, and aluminum-plastic film. Among these, the composition and amount of electrolyte are key factors determining battery performance. The accuracy of electrolyte injection is a crucial step in the battery manufacturing process, affecting the overall consistency and safety of the battery. Existing technology announcement CN209607835U discloses an electrolyte injection device for soft-pack lithium batteries, including a cell clamp, an injection device, and a centrifuge. The cell clamp is used to hold the soft-pack lithium battery to be injected; the injection device is detachably fixedly connected to the cell clamp, and during injection, the outlet end of the injection device is connected to the injection port end of the soft-pack lithium battery; the cell clamp is adapted to the centrifuge. However, during the injection process, problems such as air bubbles, electrolyte splashing, and dripping from the injection needle occur. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a liquid injection device for soft-pack lithium batteries that improves the continuity of liquid injection, reduces air bubbles, prevents some electrolyte from splashing onto the outside of the lithium battery, and collects and receives the electrolyte to avoid dripping and waste.

[0004] This utility model discloses a liquid injection device for soft-pack lithium batteries, comprising a base, a vertical cylinder, a top plate, a height adjustment component, an injection component, a feeding component, and a receiving component. The base has multiple fixing ears, and a vertical cylinder is connected to the center of the top of the base. A top plate is connected to the top of the vertical cylinder. The height adjustment component is installed inside the vertical cylinder, and the injection component is installed on top of the height adjustment component. A feeding component is installed on the outer wall of the top plate, and a receiving component is installed on the front side wall of the vertical cylinder. The lithium battery casing to be injected is transported to the feeding component, the lithium battery is placed, and the lithium battery casing is rotated to the injection position. The height adjustment component moves the injection component downwards, injecting electrolyte into the lithium battery casing. As the height adjustment component moves the injection component upwards, air bubbles are reduced, preventing electrolyte from splashing onto the outside of the lithium battery. After injection, the receiving component collects the electrolyte to prevent dripping and waste.

[0005] Preferably, the height adjustment assembly includes a lifting column, a reducer, a forward and reverse motor, a lead screw, a threaded bushing, multiple guide rods, and multiple guide blocks. The lifting column is slidably installed in the middle of the top plate. The interior of the lifting column is hollow, and a threaded bushing is installed on the lower side of the lifting column. The reducer is installed on the lower side of the vertical cylinder, and the input end of the reducer is connected to the output end of the forward and reverse motor. A heat dissipation groove is provided at the lower part of the vertical cylinder. A lead screw is installed at the output end of the reducer, and the threaded bushing is screwed onto the lead screw. A guide groove is axially provided on the inner wall of the vertical cylinder, and a guide rod is installed in the guide groove. Guide blocks are slidably installed on the outer wall of the guide rod, and multiple guide blocks are axially installed on the lower outer wall of the lifting column. When the forward and reverse motor is started, it drives the lead screw to rotate through the reducer. The lead screw and the threaded bushing cooperate to move the lifting column up and down to adjust the height, which facilitates the adjustment of the electrolyte injection position. During electrolyte injection, it moves upward gradually to reduce air bubbles and prevent some electrolyte from splashing onto the outside of the lithium battery. When the lifting column moves up and down, it drives the guide blocks to slide on the guide rods to support and guide the lifting column, ensuring stability.

[0006] Preferably, the feeding assembly includes a feeding tray, a supporting rotating ring, a gear ring, a drive motor, and gears. The feeding tray is located outside the top plate, and multiple placement slots are opened on the top of the feeding tray. A supporting rotating slot is opened on the outer wall of the top plate, and the supporting rotating ring is rotatably installed in the supporting rotating slot. The outer wall of the supporting rotating ring is connected to the inner wall of the feeding tray. A gear ring is installed at the bottom of the feeding tray. The drive motor is installed at the bottom of the top plate through a bracket, and a gear is installed at the output end of the drive motor. The gear meshes with the gear ring. The lithium battery case to be injected is transported to the placement slot above the feeding tray, so that the placement slot initially places the lithium battery case. Then, the drive motor drives the gear to rotate, and the gear drives the feeding tray to rotate through the gear ring. The feeding tray drives the lithium battery case to rotate to the injection position, which improves the continuity of work and helps to improve the injection efficiency.

[0007] Preferably, the electrolyte injection assembly includes an mounting arm, a high-capacity pump, an infusion tube, and an injection needle. The bottom end of the mounting arm is mounted on the top of the lifting column, and the injection needle is mounted on the front end of the mounting arm. The high-capacity pump is mounted on the rear neck of the top end of the mounting arm. The output end of the high-capacity pump is connected to the input end of the injection needle through the infusion tube. A valve is provided on the injection needle. When the bottom of the injection needle approaches the inner wall of the lower part of the lithium battery casing, the external controller then controls the high-capacity pump to draw electrolyte and inject it into the lithium battery casing through the injection needle. This reduces the distance between the injection needle and the inner wall of the lithium battery casing, reducing the problem of splashing when injecting electrolyte into the lithium battery casing.

[0008] Preferably, the receiving component includes a C-shaped column, a receiving ring, a receiving diaphragm, and a collection pipe. The lower part of the C-shaped column is fixedly connected to the front side wall of the vertical cylinder. A receiving ring is installed on the upper part of the C-shaped column, and a receiving diaphragm is installed in the middle of the receiving ring. A crack is provided in the middle of the receiving diaphragm. A collection pipe is installed inside the C-shaped column. During liquid injection, the lifting column drives the injection needle to move downward. The injection needle passes through the crack in the middle of the receiving diaphragm to inject liquid. After the liquid injection is completed, the injection needle moves upward to above the receiving diaphragm. The electrolyte dripping from the injection needle falls onto the receiving diaphragm and is transported and collected through the collection pipe to avoid dripping and waste.

[0009] Preferably, it also includes two electric telescopic rods and two fixed clamping plates. The inner wall of the C-shaped column above the feeding tray is provided with an installation groove. The two electric telescopic rods are respectively installed in the installation groove and the top of the top plate. The telescopic ends of the electric telescopic rods are equipped with fixed clamping plates. After the feeding tray moves the lithium battery case to the liquid injection position, the electric telescopic rods are activated to move the fixed clamping plates to clamp and fix the lithium battery case, which facilitates the liquid injection needle to inject liquid into the lithium battery case.

[0010] Preferably, it also includes multiple diagonal braces and diagonal struts. The multiple diagonal braces are axially and evenly connected to the outer wall of the vertical cylinder, and the other end of the diagonal brace is connected to the top of the base. Diagonal struts are connected between the outer wall of the vertical cylinder and the bottom of the C-shaped column. The multiple diagonal braces can increase the connection strength between the vertical cylinder and the base, while the diagonal struts can support the C-shaped column, enhance the structural stability, and ensure service life.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: the lithium battery case to be injected is transported to the feeding assembly, the lithium battery is placed, and the lithium battery case is rotated to the injection position. The height adjustment assembly drives the injection assembly to move downward, and the electrolyte is injected into the lithium battery case through the injection assembly. As the injection height adjustment assembly drives the injection assembly to move upward, air bubbles are reduced and some electrolyte is prevented from splashing to the outside of the lithium battery. After the injection is completed, the receiving assembly receives and collects the electrolyte to avoid dripping and waste. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the isometric structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the lower three-dimensional structure of this utility model;

[0015] Figure 4 This is a front cross-sectional structural diagram of the present invention;

[0016] Figure 5 This is a schematic diagram of the right-side cross-sectional structure of this utility model;

[0017] The following components are labeled in the attached diagram: 1. Base; 2. Vertical cylinder; 3. Diagonal brace; 4. Lifting column; 5. Reducer; 6. Forward and reverse motor; 7. Lead screw; 8. Threaded bushing; 9. Guide rod; 10. Guide block; 11. Top plate; 12. Mounting arm; 13. High-capacity pump; 14. Infusion tube; 15. Injection needle; 16. Feeding tray; 17. Support swivel; 18. C-shaped column; 19. Receiving ring; 20. Receiving diaphragm; 21. Collection tube; 22. Electric telescopic rod; 23. Fixing clamp; 24. Diagonal brace; 25. Gear ring; 26. Drive motor; 27. Gear. Detailed Implementation

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

[0019] like Figures 1 to 5As shown, the base 1 is provided with multiple fixing ears. A vertical cylinder 2 is connected to the middle of the top of the base 1, and a top plate 11 is connected to the top of the vertical cylinder 2. The lifting column 4 is slidably installed in the middle of the top plate 11. The interior of the lifting column 4 is hollow. A threaded bushing 8 is installed on the lower side of the interior of the lifting column 4. The reducer 5 is installed on the lower side of the interior of the vertical cylinder 2. The input end of the reducer 5 is connected to the output end of the forward and reverse motor 6. A heat dissipation groove is opened at the bottom of the vertical cylinder 2. A lead screw 7 is installed at the output end of the reducer 5. The threaded bushing 8 is screwed onto the lead screw 7. The axial direction of the inner wall of the vertical cylinder 2 is as follows. A guide groove is provided, and a guide rod 9 is installed in the guide groove. A guide block 10 is slidably installed on the outer wall of the guide rod 9. Multiple guide blocks 10 are axially installed on the lower outer wall of the lifting column 4. The feeding tray 16 is located outside the top plate 11. Multiple placement slots are provided on the top of the feeding tray 16. A support rotating groove is provided on the outer wall of the top plate 11. A support rotating ring 17 is rotatably installed in the support rotating groove. The outer wall of the support rotating ring 17 is connected to the inner wall of the feeding tray 16. A toothed ring 25 is installed at the bottom of the feeding tray 16. The drive motor 26 is mounted on the top plate 16 via a bracket. At the bottom of the disc 11, a gear 27 is installed at the output end of the drive motor 26, and the gear 27 meshes with the gear ring 25. The bottom end of the mounting arm 12 is installed at the top of the lifting column 4, and an injection needle 15 is installed at the front end of the mounting arm 12. A high-capacity pump 13 is installed at the rear neck of the top of the mounting arm 12. The output end of the high-capacity pump 13 is connected to the input end of the injection needle 15 through an infusion pipe 14. A valve is provided on the injection needle 15. The lower part of the C-shaped column 18 is fixedly connected to the front side wall of the vertical cylinder 2, and a receiving ring 19 is installed on the upper part of the C-shaped column 18. A receiving diaphragm 20 is installed in the middle of the 19, and a crack is provided in the middle of the receiving diaphragm 20. A collection pipe 21 is installed inside the C-shaped column 18. An installation groove is opened on the inner wall of the C-shaped column 18 above the feeding tray 16. Two electric telescopic rods 22 are respectively installed in the installation groove and the top of the top plate 11. A fixing clamp 23 is installed at the telescopic end of the electric telescopic rod 22. Multiple diagonal rods 3 are axially and evenly connected to the outer wall of the vertical cylinder 2. The other end of the diagonal rod 3 is connected to the top of the base 1. A diagonal brace 24 is connected between the outer wall of the vertical cylinder 2 and the bottom of the C-shaped column 18.

[0020] The lithium battery case to be injected is transported to the placement slot above the loading tray 16, where it is initially placed. Then, the drive motor 26 drives the gear 27 to rotate, which in turn drives the loading tray 16 to rotate via the gear ring 25. The loading tray 16 rotates the lithium battery case to the injection position, improving work continuity and injection efficiency. After the loading tray 16 moves the lithium battery case to the injection position, the electric telescopic rod 22 is activated to move the fixing clamp 23, clamping and fixing the lithium battery case to facilitate injection by the injection needle 15. The forward and reverse motor 6 is activated to drive the lead screw 7 to rotate via the reducer 5. The lead screw 7, in conjunction with the threaded bushing 8, moves the lifting column 4 up and down to adjust the height and injection position. During injection, the column moves upward gradually to reduce air bubbles and prevent electrolyte from splashing onto the outside of the lithium battery. As the lifting column 4 moves up and down, it causes the guide block 10 to slide on the guide rod 9. The lifting column 4 is supported and guided to ensure stability. When the bottom of the injection needle 15 approaches the inner wall of the lithium battery casing, the external controller then controls the start of the Haiba pump 13 to draw electrolyte. The electrolyte is then introduced into the lithium battery casing through the injection needle 15, which reduces the distance between the injection needle 15 and the inner wall of the lithium battery casing, reducing the problem of splashing when the electrolyte is introduced into the lithium battery casing. During injection, the lifting column 4 moves the injection needle 15 downward, and the injection needle 15 passes through the crack in the middle of the receiving diaphragm 20 to inject electrolyte. After injection, the injection needle 15 moves upward above the receiving diaphragm 20. The electrolyte dripping from the injection needle 15 falls onto the receiving diaphragm 20 and is transported and collected through the collection pipe 21 to avoid dripping and waste. Multiple diagonal rods 3 can increase the connection strength between the vertical cylinder 2 and the base 1. At the same time, the diagonal brace 24 can support the C-shaped column 18, enhance structural stability, and ensure service life.

[0021] like Figures 1 to 5As shown, this utility model discloses a liquid injection device for a soft-pack lithium battery. During operation, the lithium battery casing to be injected is transported to the placement slot above the loading tray 16, where the casing is initially placed. Then, the drive motor 26 drives the gear 27 to rotate, which in turn drives the loading tray 16 to rotate via the gear ring 25. The loading tray 16 rotates the lithium battery casing to the injection position. The electric telescopic rod 22 is activated, moving the fixing clamp 23 to clamp and fix the lithium battery casing. The forward and reverse motor 6 is activated, driving the lead screw 7 to rotate via the reducer 5. The lead screw 7, in conjunction with the threaded bushing 8, moves the lifting column 4 up and down, gradually moving upwards during injection. When the injection needle... When the bottom of the injection needle 15 approaches the inner wall of the lithium battery casing, the external controller then activates the hydrostatic pump 13 to extract electrolyte. The electrolyte is then injected into the lithium battery casing through the injection needle 15, reducing the distance between the injection needle 15 and the inner wall of the lithium battery casing and minimizing splashing during electrolyte injection. During injection, the lifting column 4 moves the injection needle 15 downwards, allowing it to pass through the crack in the middle of the receiving diaphragm 20 for injection. After injection, the injection needle 15 moves upwards above the receiving diaphragm 20, and the electrolyte dripping from the injection needle 15 falls onto the receiving diaphragm 20. The electrolyte is then transported and collected through the collection pipe 21, preventing waste from dripping.

[0022] The reducer 5, forward and reverse motor 6, hydraulic pump 13, and drive motor 26 of the liquid injection device for soft-pack lithium batteries of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0023] The above description is only a preferred embodiment of the present utility model. 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 utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A liquid injection device for a soft-pack lithium battery, characterized in that, It includes a base (1), a vertical cylinder (2), a top plate (11), a height adjustment component, a liquid injection component, a feeding component, and a receiving component. The base (1) is provided with multiple fixing ears. The top of the base (1) is connected to the middle of the top of the vertical cylinder (2). The top of the vertical cylinder (2) is connected to the top plate (11). The height adjustment component is installed inside the vertical cylinder (2). The liquid injection component is installed on the top of the height adjustment component. The feeding component is installed on the outer wall of the top plate (11). The receiving component is installed on the front side wall of the vertical cylinder (2).

2. The liquid injection device for a soft-pack lithium battery as described in claim 1, characterized in that, The height adjustment assembly includes a lifting column (4), a reducer (5), a forward and reverse motor (6), a lead screw (7), a threaded bushing (8), multiple guide rods (9), and multiple guide blocks (10). The lifting column (4) is slidably installed in the middle of the top plate (11). The interior of the lifting column (4) is hollow. A threaded bushing (8) is installed on the lower side of the interior of the lifting column (4). The reducer (5) is installed on the lower side of the interior of the vertical cylinder (2). The input end of the reducer (5) is connected to the output end of the forward and reverse motor (6). A heat dissipation groove is provided at the lower part of the vertical cylinder (2). A lead screw (7) is installed at the output end of the reducer (5). The threaded bushing (8) is screwed onto the lead screw (7). A guide groove is axially provided on the inner wall of the vertical cylinder (2). The guide rod (9) is installed in the guide groove. The guide block (10) is slidably installed on the outer wall of the guide rod (9). Multiple guide blocks (10) are axially installed on the lower outer wall of the lifting column (4).

3. The liquid injection device for a soft-pack lithium battery as described in claim 1, characterized in that, The feeding assembly includes a feeding tray (16), a support rotating ring (17), a gear ring (25), a drive motor (26), and a gear (27). The feeding tray (16) is located outside the top plate (11). The top of the feeding tray (16) has multiple placement slots. The outer wall of the top plate (11) has a support rotating slot. The support rotating ring (17) is rotatably installed in the support rotating slot. The outer wall of the support rotating ring (17) is connected to the inner wall of the feeding tray (16). The bottom of the feeding tray (16) is equipped with a gear ring (25). The drive motor (26) is installed at the bottom of the top plate (11) through a bracket. The output end of the drive motor (26) is equipped with a gear (27), which meshes with the gear ring (25).

4. The liquid injection device for a soft-pack lithium battery as described in claim 2, characterized in that, The injection assembly includes an installation arm (12), a high-power pump (13), an infusion tube (14), and an injection needle (15). The bottom end of the installation arm (12) is installed on the top of the lifting column (4), and the injection needle (15) is installed at the front end of the installation arm (12). The high-power pump (13) is installed at the rear neck of the top end of the installation arm (12). The output end of the high-power pump (13) is connected to the input end of the injection needle (15) through the infusion tube (14). A valve is provided on the injection needle (15).

5. The liquid injection device for a soft-pack lithium battery as described in claim 1, characterized in that, The receiving assembly includes a C-shaped column (18), a receiving ring (19), a receiving diaphragm (20), and a collecting pipe (21). The lower part of the C-shaped column (18) is fixedly connected to the front side wall of the vertical cylinder (2). The receiving ring (19) is installed on the upper part of the C-shaped column (18). The receiving diaphragm (20) is installed in the middle of the receiving ring (19). A crack is provided in the middle of the receiving diaphragm (20). The collecting pipe (21) is installed inside the C-shaped column (18).

6. The liquid injection device for a soft-pack lithium battery as described in claim 5, characterized in that, It also includes two electric telescopic rods (22) and two fixed clamps (23). The inner wall of the C-shaped column (18) above the feeding tray (16) is provided with an installation groove. The two electric telescopic rods (22) are respectively installed in the installation groove and the top of the top plate (11). The telescopic end of the electric telescopic rod (22) is equipped with a fixed clamp (23).

7. The liquid injection device for a soft-pack lithium battery as described in claim 5, characterized in that, It also includes multiple diagonal rods (3) and diagonal bracing rods (24). The multiple diagonal rods (3) are axially and evenly connected to the outer wall of the vertical tube (2). The other end of the diagonal rod (3) is connected to the top of the base (1). Diagonal bracing rods (24) are connected between the outer wall of the vertical tube (2) and the bottom of the C-shaped column (18).

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