Liquid injection device

Abstract

The utility model provides a liquid injection device, relates to the field of battery production technology appliances, and aims to solve the problem that after electrolyte is injected into a battery cell, the electrolyte is easy to drop around to cause damage to the battery cell and other structures to a certain extent. The utility model provides a liquid injection device. The liquid injection device comprises a protection head and a liquid injection piece, the protection head comprises a main body part and a protection part, a first channel is formed in the main body part, openings are formed in the two ends of the main body part, the opening of the first end of the main body part communicates with the first channel, the protection part is connected with the main body part, and the protection part can elastically deform to close or open the opening of the second end of the main body part; the liquid injection end of the liquid injection part can be inserted into the first channel and ejects the protection part to open the opening of the second end of the main body part, and when the liquid injection part retreats, the protection part closes the opening of the second end of the main body part.

Description

Technical Field

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

[0002] The electrolyte in a lithium-ion battery is the carrier for ion transport within the battery, and it is generally composed of lithium salts and organic solvents. The electrolyte acts as a conductor of ions between the positive and negative electrodes of a lithium-ion battery, ensuring the battery's advantages such as high voltage and high specific energy.

[0003] Electrolytes are generally prepared from high-purity organic solvents, lithium electrolytes, and necessary additives under specific conditions and in specific proportions. The electrolyte injection process requires an injection machine. Existing injection machines have open-type injection nozzles, which leave electrolyte residue on the inner wall during use. This residue drips as the nozzle moves, damaging the battery cells and affecting the equipment's operating environment.

[0004] Therefore, there is an urgent need to provide a liquid injection device to address the problems existing in the prior art to some extent. Utility Model Content

[0005] The purpose of this invention is to provide a liquid injection device to solve, to a certain extent, the problem that after electrolyte is injected into the battery cell, the electrolyte tends to drip everywhere, causing damage to the battery cell and other structures.

[0006] This utility model provides a liquid injection device, including a protective head and a liquid injection component. The protective head includes a main body and a protective part. The main body has a first channel, and both ends of the main body have openings. The opening at the first end of the main body is connected to the first channel. The protective part is connected to the main body and can elastically deform to close or open the opening at the second end of the main body. The liquid injection component's injection end can be inserted into the first channel and push open the protective part to open the opening at the second end of the main body. When the liquid injection component is withdrawn, the protective part closes the opening at the second end of the main body.

[0007] The injection component includes a guide sleeve and an injection needle. The guide sleeve has a second channel. The first end of the main body is connected to one end of the guide sleeve. The first channel is connected to the second channel, and the first channel and the second channel are located on the same axis.

[0008] Specifically, a snap-fit ​​portion is formed at one end of the guide sleeve connected to the main body, and a mating portion is formed on the protective head corresponding to the position of the snap-fit ​​portion. The snap-fit ​​portion and the mating portion cooperate to make the protective head and the guide sleeve detachably connected.

[0009] Furthermore, the diameter of the second channel is larger than the outer diameter of the injection needle.

[0010] In the closed state, the protective part and the main body form a cone-shaped protective head.

[0011] Specifically, the protective part includes a plurality of protective plates, which are arranged circumferentially along the main body, and the plurality of protective plates are conical when the opening is closed.

[0012] Furthermore, the first channel includes a first segment and a second segment, the diameter of the first segment is smaller than the diameter of the second segment, and the diameter of the first segment is adapted to the diameter of the guide sleeve, while the diameter of the second segment is adapted to the diameter of the injection needle.

[0013] Furthermore, an extension is formed at the end of the guide sleeve away from the snap-fit ​​portion, and the extension is arranged circumferentially along the guide sleeve.

[0014] Furthermore, an injection channel is formed along the axial direction of the injection needle, and the injection channel extends through both ends of the injection needle.

[0015] Furthermore, the end of the injection needle inserted into the guide sleeve is tapered.

[0016] Compared with the prior art, the liquid injection device provided by this utility model has the following advantages:

[0017] The liquid injection device provided by this utility model includes a protective head and a liquid injection component. The protective head includes a main body and a protective part. The main body has a first channel and openings at both ends. The opening at the first end of the main body is connected to the first channel. The protective part is connected to the main body and can elastically deform to close or open the opening at the second end of the main body. The liquid injection end of the liquid injection component can be inserted into the first channel and push open the protective part to open the opening at the second end of the main body. When the liquid injection component is withdrawn, the protective part closes the opening at the second end of the main body.

[0018] As can be seen from this analysis, the opening formed at the first end of the main body allows the injection end of the injection component to be inserted into the first channel. Since the opening at the second end of the main body in this application is also connected to the first channel, the injection end can be used to open the protective part by further inserting the injection component, thereby realizing the injection action.

[0019] After the liquid injection is completed, the injection component is withdrawn, and the protective part returns to its initial closed state under the action of the rebound force until the injection end of the injection component is completely separated from the protective part. That is, this application uses the thrust of the injection end of the injection component to open the protective part. When the injection end is completely separated from the protective part, the protective part loses the thrust and abutment of the injection end, and under the action of the rebound force, it closes the second end opening, thereby achieving the purpose of preventing dripping. Attached Figure Description

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

[0021] Figure 1 A cross-sectional view of the liquid injection device provided in an embodiment of this utility model;

[0022] Figure 2 This is a first-view structural schematic diagram of the protective head in the liquid injection device provided in an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the liquid injection device provided in an embodiment of the present invention;

[0024] Figure 4 This is a structural schematic diagram of the protective head in the liquid injection device provided in an embodiment of the present invention from a second perspective.

[0025] In the diagram: 1-protective head; 101-main body; 1011-first channel; 1012-fitting part; 1013-first section; 1014-second section; 102-protective part; 1021-protective plate; 2-guide sleeve; 201-second channel; 202-clamping part; 203-extension part; 3-injection needle; 301-injection channel. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing the 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 utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" 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.

[0030] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0031] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” may be used herein to describe the relationship between one element and another as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also the different orientations of the device during use or operation.

[0032] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0033] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0034] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have various constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis that they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0035] like Figures 1-4 As shown, this utility model provides a liquid injection device, including a protective head 1 and a liquid injection component; the protective head 1 includes a main body 101 and a protective part 102. The main body 101 forms a first channel 1011, and both ends of the main body 101 have openings. The opening at the first end of the main body 101 is connected to the first channel 1011. The protective part 102 is connected to the main body 101, and the protective part 102 can elastically deform to close or open the opening at the second end of the main body 101; the liquid injection end of the liquid injection component can be inserted into the first channel 1011 and push open the protective part 102 to open the opening at the second end of the main body 101. When the liquid injection component is withdrawn, the protective part 102 closes the opening at the second end of the main body 101.

[0036] Compared with the prior art, the liquid injection device provided by this utility model has the following advantages:

[0037] The liquid injection device provided by this utility model allows the liquid injection end of the liquid injection component to be inserted into the first channel 1011 through the opening formed at the first end of the main body 101. Since the opening at the second end of the main body 101 in this application is also connected to the first channel 1011, the protective part 102 can be opened by further inserting the liquid injection component, thereby realizing the liquid injection action.

[0038] After the liquid injection is completed, the injection component is withdrawn, and the protective part 102 returns to its initial closed state under the action of the rebound force until the injection end of the injection component is completely separated from the protective part 102. That is, this application uses the thrust of the injection end of the injection component to open the protective part 102. When the injection end is completely separated from the protective part 102, the protective part 102 loses the thrust and abutment of the injection end, and under the action of the rebound force, it achieves the closure of the second end opening, thereby achieving the purpose of preventing dripping.

[0039] It should be further explained here that the automatic rebound closing or opening of the second end of the main body 101 of the protective part 102 in this application can be made of elastic material. Under non-stressed conditions, it is in a naturally closed state. When the liquid injection end comes into contact with the opening of the protective part 102 and continues to move forward, it can push the protective part 102 open to realize liquid injection. When the liquid injection part is withdrawn, the protective part 102 automatically closes under the action of the rebound force to achieve the purpose of preventing dripping.

[0040] Optionally, such as Figure 1 As shown, the liquid injection component in this application includes a guide sleeve 2 and a liquid injection needle 3. The guide sleeve 2 forms a second channel 201. The first end of the main body 101 is connected to one end of the guide sleeve 2. The first channel 1011 is connected to the second channel 201, and the first channel 1011 and the second channel 201 are located on the same axis.

[0041] The guide sleeve 2 provides guidance for the insertion of the injection needle 3, thereby preventing the tip of the injection needle 3 from deviating and colliding with other parts of the main body 101, which would cause damage to the tip.

[0042] Optionally, such as Figure 1 As shown in the figure, in this application, the end of the guide sleeve 2 connected to the main body 101 has a snap-fit ​​portion 202, and the protective head 1 has a mating portion 1012 at the position corresponding to the snap-fit ​​portion 202. The snap-fit ​​portion 202 and the mating portion 1012 cooperate to make the protective head 1 and the guide sleeve 2 detachably connected.

[0043] In use, first insert one end of the guide sleeve 2 into the opening at the first end of the main body 101, so that the snap-fit ​​part 202 at the end of the guide sleeve 2 snaps into the mating part 1012 formed inside the protective head 1, thereby achieving a stable connection between the guide sleeve 2 and the protective head 1. Then insert the liquid injection component into the second channel 201 of the guide sleeve 2 until it protrudes from the protective part 102.

[0044] It is understood that the diameter of the second channel 201 in this application is larger than the outer diameter of the injection needle 3. Since the second channel 201 needs to allow the injection needle 3 to pass through smoothly and play a guiding role, the diameter of the second channel 201 in this application needs to be larger than the outer diameter of the injection needle 3 so that the injection needle 3 can be inserted. The diameter of the second channel 201 is only slightly larger than the outer diameter of the injection needle 3, so as to avoid the injection needle 3 from shaking significantly in the second channel 201 and causing the tip of the injection needle 3 to be damaged.

[0045] Optionally, such as Figure 1 As shown, in the closed state, the protective part 102 and the main body 101 form a conical protective head 1, which can match the tip of the injection needle 3 to a certain extent and ensure the leak-proof effect.

[0046] Optionally, such as Figures 1-4 As shown, the protective part 102 in this application includes a plurality of protective plates 1021, which are arranged circumferentially along the main body 101, and the plurality of protective plates 1021 are conical when the opening is closed.

[0047] Preferably, there are four protective plates 1021 in this application, which are distributed circumferentially along the main body 101. The protective plates 1021 have a triangular structure, so that they can form a cone shape after being closed by the four protective plates 1021, thereby improving the anti-drip effect on the injection needle 3.

[0048] Optionally, such as Figure 2 Combination Figure 4 As shown, the first channel 1011 in this application includes a first segment 1013 and a second segment 1014. The diameter of the first segment 1013 is larger than the diameter of the second segment 1014, and the diameter of the first segment 1013 is adapted to the diameter of the guide sleeve 2. The diameter of the second segment 1014 is adapted to the diameter of the injection needle 3.

[0049] The mating part 1012 described above is formed within the first segment 1013, and the mating part 1012 is arranged along the circumference of the first segment 1013 to form an annular groove structure. Correspondingly, the diameter of the annular groove is larger than the diameter of the first segment 1013, so that the snap-fit ​​part 202 of the guide sleeve 2 can be embedded in the annular groove to realize the detachable connection between the guide sleeve 2 and the main body 101.

[0050] The second segment 1014 formed can guide the injection needle 3. That is, the injection needle 3 is first guided by the second channel 201 of the guide sleeve 2 and moves towards the main body 101. After the injection needle 3 passes through the guide sleeve 2, it directly enters the second segment 1014 of the first channel 1011, so that it can continue to obtain guiding force, so that the injection needle 3 continues to move towards the protective part 102 until the protective part 102 is pushed open to realize the protrusion of the injection needle 3.

[0051] Optionally, such as Figure 1 As shown, in this application, the guide sleeve 2 has an extension 203 formed at the end away from the snap-fit ​​portion 202, and the extension 203 is arranged along the circumference of the guide sleeve 2.

[0052] The extension 203 formed by the guide sleeve 2, and the extension 203 arranged along the circumference of the guide sleeve 2, can form a gripping and limiting structure. That is, the extension 203 makes it convenient for the operator to grip the guide sleeve 2, thereby making it convenient for the operator to operate the injection needle 3, improving operating efficiency and convenience.

[0053] It is understood that in this application, an injection channel 301 is formed along the axial direction of the injection needle 3, and the injection channel 301 extends through both ends of the injection needle 3, thereby enabling the injection of electrolyte.

[0054] Preferably, such as Figure 1 As shown, in this application, the end of the injection needle 3 inserted into the guide sleeve 2 is tapered, which reduces the diameter of the insertion end, making it easier to insert into the guide sleeve 2 and facilitating the operator's work.

[0055] 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 liquid injection device characterized by comprising: The protective head (1) comprises a main body (101) and a protection part (102), the main body (101) is formed with a first channel (1011), both ends of the main body (101) are formed with an opening, and the opening of the first end of the main body (101) is communicated with the first channel (1011), the protection part (102) is connected with the main body (101), and the protection part (102) can elastically deform to close or open the opening of the second end of the main body (101). The liquid injection end of the liquid injection part can be inserted into the first channel (1011) and open the opening of the second end of the main body (101) by pushing the protection part (102), and when the liquid injection part is withdrawn, the protection part (102) closes the opening of the second end of the main body (101). The liquid injection part comprises a guide sleeve (2) and a liquid injection needle (3), the guide sleeve (2) is formed with a second channel (201), the first end of the main body (101) is connected with one end of the guide sleeve (2), the first channel (1011) is communicated with the second channel (201), and the first channel (1011) and the second channel (201) are located on the same axis.

2. The liquid injection apparatus according to claim 1, wherein The end of the guide sleeve (2) connected with the main body (101) is formed with a clamping part (202), the protection head (1) is formed with a matching part (1012) corresponding to the position of the clamping part (202), the clamping part (202) and the matching part (1012) are matched, so that the protection head (1) and the guide sleeve (2) are detachably connected.

3. The liquid injection device according to claim 2, wherein The diameter of the second channel (201) is greater than the outer diameter of the liquid injection needle (3).

4. The liquid injection apparatus according to claim 2, wherein The protection part (102) and the main body (101) form the protection head (1) in a conical shape in the closed state.

5. The liquid injection apparatus according to claim 1, wherein The protection part (102) comprises a plurality of protection plates (1021), a plurality of the protection plates (1021) are arranged along the circumference of the main body (101), and a plurality of the protection plates (1021) are conical when closing the opening.

6. The liquid injection apparatus according to claim 5, wherein The first channel (1011) comprises a first section (1013) and a second section (1014), the diameter of the first section (1013) is smaller than the diameter of the second section (1014), the diameter of the first section (1013) is matched with the diameter of the guide sleeve (2), and the diameter of the second section (1014) is matched with the diameter of the liquid injection needle (3).

7. The liquid injection apparatus according to claim 2, wherein The end of the guide sleeve (2) away from the clamping part (202) is formed with an extension part (203), and the extension part (203) is arranged along the circumference of the guide sleeve (2).

8. The liquid injection apparatus according to claim 3, wherein A liquid injection channel (301) is formed along the axial direction of the liquid injection needle (3), and the liquid injection channel (301) penetrates both ends of the liquid injection needle (3).

9. The liquid injection apparatus according to claim 2, wherein The end of the liquid injection needle (3) inserted into the guide sleeve (2) is conical.

10. The liquid injection apparatus according to claim 2, wherein ​

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