A waste liquid collecting mechanism of a vacuum liquid injection apparatus

Abstract

The utility model relates to battery production technical field especially relates to a kind of waste liquid collecting mechanism of vacuum liquid injection equipment, including liquid receiving box, pivot and drive assembly, wherein, liquid receiving box is located in the inside of injection cavity;Pivot is vertically arranged, and its lower end is fixedly connected with the top of one end of liquid receiving box, and upper end is upwardly through the top of injection cavity;Drive assembly is hinged in the top of injection cavity, and its output end is hinged with the upper end side of pivot, for driving pivot rotation around its axis, to drive liquid receiving box deflect between liquid receiving station and avoiding station, wherein, liquid receiving station is the position of liquid receiving box being located just below injection needle, and avoiding station is the position of liquid receiving box being away from injection needle.The utility model relates to a kind of waste liquid collecting mechanism of vacuum liquid injection equipment aims at solving the technical problem that electrolyte drops into injection cavity after injection needle is pulled out in existing vacuum liquid injection equipment and causes cavity pollution.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to a waste liquid collection mechanism for a vacuum liquid injection equipment. Background Technology

[0002] Pouch lithium batteries are widely used in new energy vehicles, consumer electronics, and energy storage systems due to their advantages such as high energy density, light weight, and customizable shape. In the manufacturing process of pouch lithium batteries, electrolyte injection is one of the key steps, usually carried out in a vacuum environment to ensure that the electrolyte fully wets the electrodes and removes internal air bubbles, thereby improving battery performance and safety.

[0003] Currently, the common method for injecting electrolyte into pouch batteries is to insert an injection needle through the cell's air bag. To accommodate the air bag opening size of different cell models, various air bag opening adjustment and positioning mechanisms have been developed in the prior art. For example, Chinese Invention Patent Publication No. CN109888362B discloses an opening mechanism and method for a pouch battery air bag, which can flexibly adjust the air bag opening according to the cell size, effectively avoiding injection failure or cell damage caused by misaligned injection needle insertion.

[0004] However, in actual injection operations, after the injection needle completes the injection and the air bag is removed, a small amount of electrolyte often remains on the needle tip or outer wall. This residual liquid can easily drip into the injection cavity during the needle lifting process, causing contamination. Utility Model Content

[0005] In view of this, the present invention proposes a waste liquid collection mechanism for a vacuum liquid injection device, which aims to solve the technical problem of residual electrolyte dripping into the injection cavity after the injection needle is pulled out in the existing vacuum liquid injection device, causing cavity contamination.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides a waste liquid collection mechanism for a vacuum liquid injection device, including a receiving box, a rotating shaft, and a drive assembly. The liquid receiving box is located inside the liquid injection cavity; The rotating shaft is vertically arranged, with its lower end fixedly connected to the top of one end of the liquid receiving box, and its upper end extending upward through the top of the liquid injection cavity; The drive assembly is hinged to the top of the injection chamber, and its output end is hinged to the upper side of the rotating shaft. It drives the rotating shaft to rotate around its axis, thereby causing the receiving box to deflect between the receiving position and the avoidance position. The liquid receiving station is the position where the liquid receiving box is located directly below the injection needle, and the avoidance station is the position where the liquid receiving box is away from the injection needle.

[0007] Based on the above technical solutions, preferably, the drive assembly includes a cylinder and a column, wherein, The column is fixed to the top of the injection cavity; The cylinder is horizontally positioned, with its cylinder body hinged to the upper end of the column, and its output shaft hinged to the rotating shaft.

[0008] Based on the above technical solutions, preferably, a hinge support is provided on the upper side of the rotating shaft, wherein, The output shaft end of the cylinder is hinged to the inside of the hinge support.

[0009] Based on the above technical solutions, preferably, the rotating shaft and the injection cavity are rotatably connected by a bearing.

[0010] Based on the above technical solutions, preferably, a clamp is fixed to the top of the liquid receiving box, wherein... The clamp is fixed to the lower end of the rotating shaft.

[0011] Based on the above technical solutions, preferably, the side of the clamp is provided with a U-shaped groove running vertically through it, wherein, The lower end of the rotating shaft is embedded in the U-shaped groove; A tension bolt is provided through the opening of the U-shaped groove. The tension bolt is used to reduce the opening width of the U-shaped groove so as to clamp and fix the rotating shaft in the U-shaped groove.

[0012] Based on the above technical solutions, preferably, the liquid receiving box is provided with a lid on top, wherein... The lid of the box has a collection hole that runs vertically through it. When the liquid receiving box is in the liquid receiving position, the collection hole is located directly below the injection needle.

[0013] Based on the above technical solutions, preferably, the bottom surface of the liquid receiving box is set as an inclined surface, and the inclined surface slopes downward from the side near the collection hole to the side near the rotating shaft.

[0014] Based on the above technical solutions, preferably, it also includes a drainage funnel, a liquid storage tank is provided at the bottom of the inner side of the injection chamber, and a liquid outlet is provided at the bottom of the receiving box. The drainage funnel is fixed to the bottom of the inner side of the injection cavity, with its top funnel opening located directly below the liquid outlet and its bottom outlet located inside the liquid storage tank.

[0015] Based on the above technical solutions, preferably, the liquid outlet extends downward to form a tubular liquid outlet nozzle, wherein, The lower end of the liquid outlet extends into the inside of the funnel opening of the drainage funnel.

[0016] The waste liquid collection mechanism of the vacuum liquid injection device of this utility model has the following advantages over the prior art: (1) By setting up a receiving box, a rotating shaft and a drive assembly, the receiving box can be quickly moved under the injection needle after the injection needle is pulled out, so as to collect the residual electrolyte in time and avoid it dripping into the injection chamber and causing pollution. At the same time, the rotating design ensures that the receiving box can be quickly deflected to an avoidance position when needed, without affecting subsequent operations.

[0017] (2) The U-shaped groove and tension bolts allow for quick assembly and disassembly of the receiving box, facilitating maintenance and cleaning. Furthermore, the position of the receiving box can be adjusted according to actual needs to ensure optimal waste liquid collection.

[0018] (3) By setting a cover with a collection hole on the top of the receiving box, the waste liquid dripping from the injection needle can be guided into the box, and the internal waste liquid can be effectively prevented from splashing out during the deflection of the receiving box. At the same time, the bottom surface of the receiving box adopts a sloped structure that is inclined from the collection hole side to the rotating shaft side, so that the waste liquid is quickly moved away from the collection hole area, further reducing the back splashing of waste liquid from the collection hole and effectively maintaining the cleanliness of the inside of the injection chamber.

[0019] (4) By setting up a drainage funnel, a storage tank and a downward-extending tubular outlet, the waste liquid can be automatically guided and collected when the receiving box is deflected to the discharge position. At the same time, the outlet extends into the drainage funnel to form a partially closed channel, which effectively prevents the waste liquid from splashing or leaking during the discharge process, and ensures that the receiving box remains empty and clean during the subsequent deflection action. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of a vacuum liquid injection device according to the present invention; Figure 2 This is a partial cross-sectional view of the waste liquid collection mechanism of this utility model; Figure 3 This is a partial perspective view of the waste liquid collection mechanism of this utility model; Figure 4 This is a partial perspective view of the drive component of this utility model; Figure 5 This is a partial exploded view of the liquid receiving box of this utility model; In the diagram: 1. Liquid receiving box; 2. Rotating shaft; 3. Drive assembly; 4. Drainage funnel; 5. Liquid injection chamber; 6. Liquid injection needle; 11. Clamp; 12. Tensioning bolt; 13. Box cover; 21. Hinge support; 31. Cylinder; 32. Column; 101. Liquid outlet hole; 102. Liquid outlet nozzle; 501. Liquid storage tank; 1301. Collection hole; 1101. U-shaped groove. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0024] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0028] like Figure 1-5 As shown, the waste liquid collection mechanism of the vacuum liquid injection device of this utility model includes a liquid receiving box 1, a rotating shaft 2, and a drive assembly 3, and the liquid receiving box 1 is disposed inside the liquid injection chamber 5. The rotating shaft 2 is vertically arranged, with its lower end fixedly connected to the top of one end of the liquid receiving box 1, and its upper end extending upward through the top of the liquid injection chamber 5; the drive assembly 3 is hinged to the top of the liquid injection chamber 5, and its output end is hinged to the upper side of the rotating shaft 2, for driving the rotating shaft 2 to rotate around its axis, thereby causing the liquid receiving box 1 to deflect between the liquid receiving position and the avoidance position, wherein the liquid receiving position is the position where the liquid receiving box 1 is located directly below the liquid injection needle 6, and the avoidance position is the position where the liquid receiving box 1 is away from the liquid injection needle 6.

[0029] Before the liquid receiving operation begins, the liquid receiving box 1 is in a clearance position to avoid interfering with the insertion of the injection needle 6 into the battery cell gas bag. After the liquid injection is completed, the injection needle 6 is pulled out of the battery cell gas bag and the battery cell gas bag is moved, the drive component 3 is activated, driving the rotating shaft 2 to rotate around its axis, causing the liquid receiving box 1 to deflect to the liquid receiving position, so as to promptly receive the residual electrolyte dripping from the needle tip or the outer wall, effectively preventing the electrolyte from dripping into the injection cavity 5 and causing contamination.

[0030] After the waste liquid is collected, the drive component 3 is activated again, driving the rotating shaft 2 to rotate in the opposite direction, causing the liquid receiving box 1 to deflect away from the injection needle 6 and return to the avoidance position, providing sufficient space for subsequent processes such as cell transfer and cavity door opening, ensuring the continuity of equipment operation and the smoothness of production rhythm.

[0031] In this embodiment, the drive assembly 3 includes a cylinder 31 and a column 32. The column 32 is fixed to the top of the injection chamber 5; the cylinder 31 is horizontally arranged, with its cylinder body hinged to the upper end of the column 32, and its output shaft hinged to the rotating shaft 2. This arrangement is compact, occupies little space, and the linear thrust of the cylinder 31 is converted into the rotational torque of the rotating shaft 2 through the hinged structure, resulting in rapid response and precise control, ensuring reliable switching of the receiving box 1 between the receiving position and the avoidance position. The drive assembly 3 uses the cylinder 31 as the actuator, and its drive control technology is a mature existing technology, which will not be described in detail here.

[0032] To enhance connection stability, a hinge support 21 is provided on the upper side of the rotating shaft 2, and the output shaft end of the cylinder 31 is hinged to the inner side of the hinge support 21. When the cylinder 31 is activated, its output end pushes the hinge support 21 to deflect around the rotating shaft 2, thereby driving the rotating shaft 2 to rotate. At the same time, the cylinder body of the cylinder 31 swings synchronously around the column 32 as the fulcrum, adapting to the angle changes during the deflection process, avoiding mechanism jamming or stress concentration, and improving the overall smoothness and durability of operation.

[0033] In this embodiment, the rotating shaft 2 is rotatably connected to the top of the liquid injection chamber 5 through a bearing, which significantly reduces the rotational resistance, makes the deflection action of the liquid receiving box 1 smoother and quieter, reduces mechanical wear, extends the service life of the equipment, and is conducive to long-term stable operation in a vacuum environment.

[0034] Furthermore, the connection between the rotating shaft 2 and the liquid receiving box 1 is achieved through a clamp 11, namely: a clamp 11 is fixed to the top of the liquid receiving box 1, and the clamp 11 is clamped and fixed to the lower end of the rotating shaft 2. This structure facilitates modular assembly and subsequent maintenance and replacement.

[0035] Specifically, a U-shaped groove 1101 is vertically through the side of the clamp 11, and the lower end of the rotating shaft 2 is embedded in the U-shaped groove 1101. A tensioning bolt 12 is inserted through the opening of the U-shaped groove 1101. The tensioning bolt 12 consists of a bolt and a nut. The bolt passes through both sides of the clamp 11, and the nut is tightened at the end of the bolt. When the lower end of the rotating shaft 2 is placed into the U-shaped groove 1101, tightening the nut will cause the two sides of the opening of the U-shaped groove 1101 to close inward, thereby reducing the opening width and firmly clamping the rotating shaft 2 in the U-shaped groove 1101.

[0036] This clamping structure not only supports the quick disassembly and assembly of the liquid receiving box 1 for easy cleaning or replacement, but also allows for fine adjustment of the initial angle of the liquid receiving box 1 by adjusting the clamping force or installation position. This ensures that when the box is in the liquid receiving position, the collection hole 1301 on the cover 13 is precisely aligned with the injection needle 6, thereby maximizing the waste liquid collection efficiency and preventing leakage.

[0037] In this embodiment, the cover 13 has a through-hole 1301. When the receiving box 1 is in the receiving position, the collecting hole 1301 is located directly below the injection needle 6. The waste liquid dripping after the injection needle 6 is pulled out falls into the receiving box 1 through the collecting hole 1301. The cover 13 covers the top of the receiving box 1, which not only provides a directional channel for the waste liquid, but also effectively shields the internal liquid when the receiving box 1 is deflected to the avoidance position, preventing the waste liquid from splashing out due to shaking, thereby maintaining the cleanliness and operational safety of the injection chamber 5.

[0038] Furthermore, the bottom surface of the liquid receiving box 1 is designed as an inclined surface, which slopes downward from the side near the collection hole 1301 to the side near the rotating shaft 2. This allows the waste liquid falling into the liquid receiving box 1 to flow rapidly to the side of the rotating shaft 2 away from the collection hole 1301 under the action of gravity, thus preventing the waste liquid from accumulating near the collection hole 1301. This significantly reduces the back splashing of waste liquid from the collection hole 1301 and further improves the cleanliness of the cavity.

[0039] Based on the above structure, the waste liquid collection mechanism of the vacuum liquid injection device of this utility model further includes a drainage funnel 4, a liquid storage tank 501 is provided at the bottom of the inner side of the injection chamber 5, and a liquid outlet 101 is provided at the bottom of the receiving box 1. The drainage funnel 4 is fixed to the bottom of the inner side of the injection chamber 5, with its top funnel opening located directly below the liquid outlet 101, and its bottom outlet located inside the liquid storage tank 501. The liquid outlet 101 extends downward to form a tubular liquid outlet 102, the lower end of which extends into the inner side of the funnel opening of the drainage funnel 4.

[0040] In this design, the diameter of the funnel opening at the top of the drainage funnel 4 is larger than the diameter of the outlet nozzle 102, and the funnel opening is coaxially arranged with the rotating shaft 2. The outlet hole 101 is located close to the rotating shaft 2. This ensures that as the receiving box 1 deflects around the rotating shaft 2, the movement trajectory of the outlet nozzle 102 is a small-radius arc centered on the rotating shaft 2. Since the funnel opening of the drainage funnel 4 is coaxial with the rotating shaft 2, and its opening size is sufficient to cover this movement trajectory, the lower end of the outlet nozzle 102 is always within the inner range of the funnel opening of the drainage funnel 4, regardless of whether the receiving box 1 is in the receiving position or the avoidance position.

[0041] In this structural layout, the waste liquid dripping from the injection needle 6 after it is withdrawn falls into the receiving box 1 through the collection hole 1301 on the box cover 13, and then flows into the drainage funnel 4 below through the outlet 102, finally collecting in the storage tank 501, realizing real-time guidance and continuous discharge of waste liquid. Since the outlet 102 always extends into the drainage funnel 4, the two form a partially closed guiding channel, effectively preventing the waste liquid from splashing, dripping, or contacting the inner wall of the injection cavity 5 during flow, ensuring that the waste liquid is completely guided into the storage tank 501. At the same time, there is no waste liquid accumulation inside the receiving box 1, and it remains empty and clean during subsequent deflection actions, significantly improving the automation level and maintenance convenience of the equipment.

[0042] The method of using the waste liquid collection mechanism of the vacuum liquid injection equipment of this utility model is as follows: Before the injection begins, the receiving box 1 is in a clearance position, i.e., away from the injection needle 6, to avoid interfering with the injection operation. After the injection is completed, the drive assembly 3 is activated, driving the rotating shaft 2 to rotate, causing the receiving box 1 to deflect from the clearance position to the receiving position, i.e., directly below the injection needle 6. At this time, the waste liquid dripping after the injection needle 6 is pulled out falls into the receiving box 1 through the collection hole 1301 on the box cover 13. This waste liquid then enters the drainage funnel 4 through the outlet hole 101 and outlet nozzle 102 at the bottom of the receiving box 1, and then enters the storage tank 501 for centralized storage. After the waste liquid is collected, the drive assembly 3 is activated again, driving the rotating shaft 2 to rotate in the opposite direction, causing the receiving box 1 to deflect away from the clearance position.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste liquid collection mechanism for a vacuum liquid injection device, characterized in that: It includes a liquid receiving box (1), a rotating shaft (2), and a drive assembly (3), wherein, The liquid receiving box (1) is located inside the liquid injection cavity (5); The rotating shaft (2) is vertically arranged, with its lower end fixedly connected to the top of one end of the liquid receiving box (1), and its upper end extending upward through the top of the liquid injection cavity (5); The drive assembly (3) is hinged to the top of the injection chamber (5), and its output end is hinged to the upper side of the rotating shaft (2) to drive the rotating shaft (2) to rotate around its axis, thereby causing the receiving box (1) to deflect between the receiving position and the avoidance position. The liquid receiving station is the position where the liquid receiving box (1) is located directly below the injection needle (6), and the avoidance station is the position where the liquid receiving box (1) is far away from the injection needle (6).

2. The waste liquid collection mechanism of a vacuum liquid injection device as described in claim 1, characterized in that: The drive assembly (3) includes a cylinder (31) and a column (32), wherein, The column (32) is fixed to the top of the injection cavity (5); The cylinder (31) is horizontally arranged, its cylinder body is hinged to the upper end of the column (32), and its output shaft is hinged to the rotating shaft (2).

3. The waste liquid collection mechanism of a vacuum liquid injection device as described in claim 2, characterized in that: The upper side of the rotating shaft (2) is provided with a hinge support (21), wherein, The output shaft end of the cylinder (31) is hinged to the inside of the hinge support (21).

4. The waste liquid collection mechanism of a vacuum liquid injection device as described in claim 1, characterized in that: The rotating shaft (2) and the injection chamber (5) are rotatably connected by bearings.

5. The waste liquid collection mechanism of a vacuum liquid injection device as described in claim 1, characterized in that: The liquid receiving box (1) is fixed with a clamp (11) on top, wherein, The clamp (11) is clamped and fixed to the lower end of the rotating shaft (2).

6. The waste liquid collection mechanism of a vacuum liquid injection device as described in claim 5, characterized in that: The clamp (11) has a U-shaped groove (1101) that runs vertically through its side. The lower end of the rotating shaft (2) is embedded in the U-shaped groove (1101); A tension bolt (12) is provided through the opening of the U-shaped groove (1101). The tension bolt (12) is used to reduce the opening width of the U-shaped groove (1101) so as to clamp and fix the rotating shaft (2) in the U-shaped groove (1101).

7. The waste liquid collection mechanism of a vacuum liquid injection device as described in claim 1, characterized in that: The liquid receiving box (1) is provided with a box cover (13) on the top, wherein, The box cover (13) has a collection hole (1301) that runs vertically through it. When the liquid receiving box (1) is in the liquid receiving position, the collection hole (1301) is located directly below the injection needle (6).

8. The waste liquid collection mechanism of a vacuum liquid injection device as described in claim 7, characterized in that: The bottom surface of the liquid receiving box (1) is set as an inclined surface, which slopes downward from the side near the collection hole (1301) to the side near the rotating shaft (2).

9. A waste liquid collection mechanism for a vacuum liquid injection device as described in any one of claims 1-8, characterized in that: It also includes a drainage funnel (4), a liquid storage tank (501) is provided at the bottom of the inner side of the injection chamber (5), and a liquid outlet hole (101) is provided at the bottom of the receiving box (1). The drainage funnel (4) is fixed to the bottom of the inner side of the injection cavity (5), with its top funnel opening located directly below the liquid outlet (101) and its bottom outlet located inside the liquid storage tank (501).

10. The waste liquid collection mechanism of a vacuum liquid injection device as described in claim 9, characterized in that: The liquid outlet (101) extends downward to form a tubular liquid outlet nozzle (102), wherein, The lower end of the liquid outlet (102) extends into the inside of the funnel opening of the drainage funnel (4).

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