Suction nozzle for docking a filling opening

Abstract

The utility model discloses a kind of suction nozzles for butt joint liquid injection hole, including suction nozzle body, suction passage is vertically penetrated and arranged on the suction nozzle body, the upper end of the suction nozzle body is connected with liquid injection pipeline or negative pressure formation air extraction pipeline, lower end butt joint liquid injection hole;The lower end of the suction passage is equipped with first annular extension, and the upper end is equipped with second annular extension end face, the first annular extension extends to the center direction of the suction passage and is upwardly inclined to be arranged, and the second annular extension end face extends to the outside of the suction passage and is downwardly inclined to be arranged.The utility model of a kind of suction nozzles for butt joint liquid injection hole, by the upper end of the suction passage is set second annular extension end face, lower end is set first annular extension, to be used for double restriction residual electrolyte in suction passage drops downward, avoid having electrolyte from suction nozzle place drop on battery cover plate.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a suction nozzle for connecting to a liquid injection hole. Background Technology

[0002] During the battery electrolyte filling process, after the electrolyte is injected into the battery and the filling nozzle is removed from the filling hole, a small amount of residual electrolyte in the nozzle will drip onto the vicinity of the filling hole on the battery cover. During the negative pressure formation process, when the suction nozzle is connected to the filling hole to extract gas from the battery, a small amount of electrolyte will also be drawn to the suction nozzle; and when the negative pressure formation process is completed and the suction nozzle is removed from the filling hole, a small amount of residual electrolyte in the nozzle will also drip onto the vicinity of the filling hole on the battery cover.

[0003] The electrolyte dripping near the injection hole absorbs moisture from the air and undergoes a hydrolysis reaction, generating corrosive substances (such as hydrogen fluoride). This corrodes the metal material of the battery cover (plain aluminum sheet), the insulating varnish, and the surrounding plastic parts, damaging the insulation and structural integrity of the battery cover. Utility Model Content

[0004] To address the aforementioned deficiencies in the existing technology, this utility model provides a suction nozzle for connecting to the injection hole. By providing a second annular extended end face at the upper end of the suction channel and a first annular extended portion at the lower end, it serves to doubly restrict the downward dripping of residual electrolyte within the suction channel, preventing electrolyte from dripping from the suction nozzle onto the battery cover.

[0005] The technical solution of this utility model to solve the above problems is: to provide a suction nozzle for connecting to an injection hole, including a suction nozzle body, a suction channel vertically extending through the suction nozzle body, the upper end of the suction nozzle body being connected to an injection pipe or a negative pressure gas extraction pipe, and the lower end connecting to the injection hole; the lower end of the suction channel is provided with a first annular extension and the upper end is provided with a second annular extension end face, the first annular extension extending towards the center of the suction channel and inclined upward, and the second annular extension end face extending towards the outside of the suction channel and inclined downward.

[0006] Furthermore, the suction nozzle body includes a sealing part and an insertion part that are integrally connected to each other. The lower end of the suction channel extends to the lower end face of the insertion part and the upper end extends to the upper end face of the sealing part. The insertion part is used to insert into the liquid injection hole or to abut against and seal the upper end face of the liquid injection hole. When the insertion part is inserted into the liquid injection hole, the sealing part abuts against the battery cover plate where the liquid injection hole is located and seals the upper end face of the liquid injection hole.

[0007] Furthermore, the second annular extended end face is disposed at the upper end face of the sealing part, and a vertical extension is also disposed at the upper end face of the sealing part. The vertical extension is disposed around the second annular extended end face, and the vertical extension and the second annular extended end face cooperate to form a sinking storage area capable of retaining electrolyte.

[0008] Furthermore, it also includes an intermediate step portion, which is disposed at the junction of the insertion portion and the sealing portion, and the lower end face of the sealing portion is configured as a first abutting sealing end face surrounding the intermediate step portion.

[0009] Furthermore, a first sealing ring is provided at the first abutting sealing end face.

[0010] Furthermore, the lower end face of the intermediate step portion is configured as a second abutting and sealing end face surrounding the insertion portion.

[0011] Furthermore, a second sealing ring is provided at the second abutting sealing end face.

[0012] Furthermore, the sealing part, the intermediate step part, and the insertion part are all configured as cylinders, and their diameters decrease sequentially; the suction channel is configured as a cylindrical channel.

[0013] Furthermore, a third sealing ring is provided at the lower end face of the insertion part.

[0014] The beneficial effects of this utility model are: 1. A second annular extension end face is provided at the upper end of the suction channel. The second annular extension end face cooperates with the vertical extension to form a sinking storage area, which is used to retain residual electrolyte that slides down from the wall of the liquid injection pipe or the pipe wall of the negative pressure gas extraction pipe, so as to prevent electrolyte from sliding down from the corresponding pipe wall into the suction channel and dripping out from the lower end of the suction channel.

[0015] The lower end of the suction channel is provided with a first annular extension. The first annular extension cooperates with the inner wall of the suction channel to form a reservoir for storing a very small amount of electrolyte. This prevents electrolyte remaining on the inner wall of the suction channel from dripping directly downwards. At the same time, it can also form a second leak-proof isolation structure below the sinking storage area to prevent residual electrolyte from splashing out from the sinking storage area and sliding down the inner wall of the suction channel.

[0016] 2. When the suction nozzle comes into contact with the injection hole, its insertion end is used to insert into the injection hole, and its sealing end's first contact sealing end face, in conjunction with the first sealing ring, can press tightly against the upper end face of the injection hole to ensure that the suction nozzle and the injection hole can be sealed and connected to ensure the injection effect or negative pressure suction effect.

[0017] 3. When performing liquid injection or negative pressure formation on certain special test batteries with relatively large length, width, or diameter of the terminals and relatively small overall size (small terminal spacing, liquid injection holes located between terminals, and low diameter of the liquid injection holes), if the first contact sealing end face is blocked and limited by the terminals and cannot contact the battery cover, a relatively small intermediate step portion can be used to contact and seal the liquid injection hole to further meet the laboratory battery liquid injection and negative pressure formation test requirements. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the suction nozzle in this embodiment; Figure 2 This is a cross-sectional view of the suction nozzle in this embodiment; Figure 3 This is a schematic diagram of the structure of the suction nozzle and the injection holes of small, medium and large diameters in this embodiment. 1-Suction nozzle body, 2-Suction channel, 3-First annular extension, 4-Second annular extension end face, 5-First sealing ring, 6-Second sealing ring, 7-Third sealing ring; 11-Sealing part, 12-Insert part, 13-Vertical extension part, 14-Intermediate step part, 15-First abutting sealing end face, 16-Second abutting sealing end face. Detailed Implementation

[0020] 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 are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that terms such as "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The following is based on Figures 1-3 The technical solution of this utility model is described in detail.

[0024] Please see Figure 1 , Figure 2 A specific embodiment of the present invention provides a suction nozzle for connecting to an injection hole, comprising a suction nozzle body 1, a suction channel 2 vertically extending through the center of the suction nozzle body 1, the upper end of the suction nozzle body 1 being connected to an injection pipe or a negative pressure gas extraction pipe, and the lower end connecting to an injection hole; the lower end of the suction channel 2 is provided with a first annular extension 3, and the upper end is provided with a second annular extension end face 4, the first annular extension 3 extending towards the center of the suction channel 2 and inclined upward, and the second annular extension end face 4 extending outward towards the suction channel 2 and inclined downward.

[0025] For details, please refer to Figure 2 ,by Figure 2 Taking the orientation shown as an example, in this embodiment, the suction nozzle body 1 includes a sealing part 11, a middle step part 14, and an insertion part 12 that are integrally connected from top to bottom. The sealing part 11, the middle step part 14, and the insertion part 12 are all cylinders. The suction channel 2 is also a cylindrical channel. The lower end of the suction channel 2 extends to the lower end face of the insertion part 12, and the upper end extends to the upper end face of the sealing part 11.

[0026] In addition, the second annular extension end face 4 is provided at the upper end face of the sealing part 11, and the upper end face of the sealing part 11 is also provided with a vertical extension part 13. The vertical extension part 13 is arranged around the second annular extension end face 4, and the vertical extension part 13 and the second annular extension end face 4 cooperate to form a sinking storage area that can retain electrolyte.

[0027] Meanwhile, the lower end face of the sealing part 11 is configured as a first abutting sealing end face 15 surrounding the intermediate step part 14, and the lower end face of the intermediate step part 14 is configured as a second abutting sealing end face 16 surrounding the insertion part 12; a first sealing ring 5 is provided at the first abutting sealing end face 15, a second sealing ring 6 is provided at the second abutting sealing end face 16, and a third sealing ring 7 is provided at the lower end face of the insertion part 12.

[0028] In this embodiment, the first sealing ring 5, the second sealing ring 6, and the third sealing ring 7 are all sealing gaskets, all made of wear-resistant rubber.

[0029] Correspondingly, the working method and principle of a suction nozzle used for docking with the injection hole in this embodiment are as follows: First, a second annular extended end face 4 is provided at the upper end of the suction channel 2. The second annular extended end face 4 cooperates with the vertical extension 13 to form a sinking storage area, which is used to retain residual electrolyte that slides down from the wall of the liquid injection pipe or the pipe wall of the negative pressure forming the air extraction pipe, so as to prevent electrolyte from sliding down from the corresponding pipe wall into the suction channel 2 and dripping out from the lower end of the suction channel 2.

[0030] The lower end of the suction channel 2 is provided with a first annular extension 3. The first annular extension 3 cooperates with the inner wall of the suction channel 2 to form a structure for storing a very small amount of electrolyte, so as to prevent the electrolyte remaining on the inner wall of the suction channel 2 from dripping directly downwards. At the same time, it can also form a second leak-proof isolation structure below the sinking storage area to prevent residual electrolyte from splashing out from the sinking storage area and sliding down the inner wall of the suction channel 2.

[0031] Second, please refer to Figure 3 (Left) Taking the injection of liquid into the battery as an example, when the battery clamp holds the corresponding battery that needs to be injected, it will also press the suction nozzle of this embodiment against the injection hole of the battery. The injection pipe passes through the clamping plate of the battery clamp to seal and communicate with the suction nozzle.

[0032] In this regard, since the diameter of the insertion part 12 is relatively small, if the diameter of the injection hole is still smaller than the diameter of the insertion part 12, the suction nozzle can be directly pressed against the injection hole to inject electrolyte into the corresponding battery.

[0033] At this time, the lower end of the insertion part 12 is sealed against the battery cover body around the injection hole by the third sealing ring 7, which can limit the leakage of electrolyte from the abutment gap between the lower end face of the insertion part 12 and the battery cover.

[0034] It should be noted that the above scenario typically only occurs in battery R&D and testing environments, and the battery with the extremely small injection holes usually only has a few, so the battery can be vacuum-filled using the above method. In actual production, there are usually no batteries with injection hole diameters smaller than the diameter of the insertion part 12 that require mass production. If such batteries do exist, the above injection method will not be considered.

[0035] Additionally, please see Figure 3 (in the middle) If the diameter of the injection hole is greater than the diameter of the insertion part 12 but less than the diameter of the intermediate step part 14, the insertion part 12 can be inserted downward into the injection hole, and the second abutting sealing end face 16 of the intermediate step part 14 can be pressed against the upper surface of the battery cover body around the injection hole to inject the corresponding battery.

[0036] At this time, the second abutting sealing end face 16 is sealed to the battery cover body around the injection hole by the second sealing ring 6. Especially when the insertion part 12 has been inserted into the injection hole, it can effectively limit the leakage of electrolyte from the abutting gap between the second abutting sealing end face 16 and the battery cover.

[0037] It should be noted that in this embodiment, the diameter of the intermediate step portion 14 is smaller than the diameter of the sealing portion 11. This is to address certain special batteries that are characterized by having both positive and negative terminals located on the battery cover, and having relatively large length, width, or diameter dimensions. This results in the injection hole being very close to the positive and negative terminals. The sealing portion 11, which originally had a larger diameter, may be blocked by the positive and negative terminals, thus failing to abut against the battery cover and seal the end face of the injection hole. In this case, the intermediate step portion 14, which has a smaller diameter, can be used to seal the injection hole.

[0038] Similarly, these special types of batteries usually only exist in laboratories, where the purpose of increasing the size of the terminals is to test the battery's extreme charge and discharge performance.

[0039] Furthermore, please refer to Figure 3 (Right) If the diameter of the injection hole is greater than the diameter of the insertion part 12 and the diameter of the intermediate step part 14, but smaller than the diameter of the sealing part 11, then the insertion part 12 and the intermediate step part 14 can be inserted downward into the injection hole, so that the first abutting sealing end face 15 of the sealing part 11 abuts against the upper surface of the battery cover body around the injection hole, so as to inject the corresponding battery.

[0040] At this time, the first abutting sealing end face 15 is sealed to the battery cover body around the injection hole by the first sealing ring 5. Especially when the insertion part 12 and the middle step part 14 have been inserted into the injection hole, it can better limit the leakage of electrolyte from the abutting gap between the second abutting sealing end face 16 and the battery cover.

[0041] It should be noted here that: Figure 3 The scenario shown on the right is a relatively conventional application scenario. It can be applied to actual production or in the laboratory for technicians to fill batteries with electrolyte.

[0042] Moreover, as long as the diameter of the injection hole is not less than the diameter of the intermediate step portion 14 and not greater than the diameter of the sealing portion 11, it can maintain a sealed connection with this embodiment to realize the injection operation of the battery.

[0043] The above methods and working principles also apply to the negative pressure formation and extraction process, so they will not be elaborated further.

[0044] Anything not mentioned above applies to existing technologies.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A suction nozzle for connecting to an injection port, characterized in that, Includes a suction nozzle body (1), on which a suction channel (2) is vertically opened. The upper end of the suction nozzle body (1) is connected to a liquid injection pipe or a negative pressure gas extraction pipe, and the lower end is connected to a liquid injection hole. The lower end of the suction channel (2) is provided with a first annular extension (3), and the upper end is provided with a second annular extension end face (4). The first annular extension (3) extends toward the center of the suction channel (2) and is inclined upward. The second annular extension end face (4) extends toward the outside of the suction channel (2) and is inclined downward.

2. The suction nozzle as described in claim 1, characterized in that, The suction nozzle body (1) includes a sealing part (11) and an insertion part (12) that are integrally connected to each other. The lower end of the suction channel (2) extends to the lower end face of the insertion part (12) and the upper end extends to the upper end face of the sealing part (11). The insertion part (12) is used to insert into the liquid injection hole or to abut against and seal the upper end face of the liquid injection hole. When the insertion part (12) is inserted into the liquid injection hole, the sealing part (11) abuts against the battery cover plate where the liquid injection hole is located and seals the upper end face of the liquid injection hole.

3. The suction nozzle as described in claim 2, characterized in that, The second annular extension end face (4) is disposed at the upper end face of the sealing part (11), and a vertical extension part (13) is also disposed at the upper end face of the sealing part (11). The vertical extension part (13) is disposed around the second annular extension end face (4), and the vertical extension part (13) and the second annular extension end face (4) cooperate to form a sinking storage area that can retain electrolyte.

4. The suction nozzle as described in claim 2, characterized in that, It also includes an intermediate step portion (14), which is disposed at the junction of the insertion portion (12) and the sealing portion (11), and the lower end face of the sealing portion (11) is configured as a first abutting sealing end face (15) surrounding the intermediate step portion (14).

5. The suction nozzle as described in claim 4, characterized in that, A first sealing ring (5) is provided at the first abutting sealing end face (15).

6. The suction nozzle as described in claim 4, characterized in that, The lower end face of the intermediate step portion (14) is configured as a second abutting sealing end face (16) surrounding the insertion portion (12).

7. The suction nozzle as described in claim 6, characterized in that, A second sealing ring (6) is provided at the second abutting sealing end face (16).

8. The suction nozzle as described in claim 4, characterized in that, The sealing part (11), the intermediate step part (14), and the insertion part (12) are all configured as cylinders, and their diameters decrease sequentially; the suction channel (2) is configured as a cylindrical channel.

9. The suction nozzle as described in claim 2, characterized in that, A third sealing ring (7) is provided at the lower end face of the insertion part (12).

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